Java tutorial
/******************************************************************************* * Copyright (c) 2000, 2017 IBM Corporation and others. * * This program and the accompanying materials * are made available under the terms of the Eclipse Public License 2.0 * which accompanies this distribution, and is available at * https://www.eclipse.org/legal/epl-2.0/ * * SPDX-License-Identifier: EPL-2.0 * * Contributors: * IBM Corporation - initial API and implementation *******************************************************************************/ package org.eclipse.swt.examples.imageanalyzer; import static org.eclipse.swt.events.SelectionListener.widgetSelectedAdapter; import java.io.InputStream; import java.net.URL; import java.text.MessageFormat; import java.util.ArrayList; import java.util.List; import java.util.ResourceBundle; import org.eclipse.swt.SWT; import org.eclipse.swt.SWTError; import org.eclipse.swt.SWTException; import org.eclipse.swt.custom.StyleRange; import org.eclipse.swt.custom.StyledText; import org.eclipse.swt.events.ControlEvent; import org.eclipse.swt.events.ControlListener; import org.eclipse.swt.events.KeyAdapter; import org.eclipse.swt.events.KeyEvent; import org.eclipse.swt.events.MouseListener; import org.eclipse.swt.events.PaintEvent; import org.eclipse.swt.events.SelectionListener; import org.eclipse.swt.events.ShellListener; import org.eclipse.swt.graphics.Color; import org.eclipse.swt.graphics.Cursor; import org.eclipse.swt.graphics.Font; import org.eclipse.swt.graphics.GC; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.graphics.ImageData; import org.eclipse.swt.graphics.ImageLoader; import org.eclipse.swt.graphics.ImageLoaderEvent; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.graphics.RGB; import org.eclipse.swt.graphics.Rectangle; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.layout.RowLayout; import org.eclipse.swt.printing.PrintDialog; import org.eclipse.swt.printing.Printer; import org.eclipse.swt.printing.PrinterData; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Canvas; import org.eclipse.swt.widgets.Combo; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Dialog; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.FileDialog; import org.eclipse.swt.widgets.Group; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Menu; import org.eclipse.swt.widgets.MenuItem; import org.eclipse.swt.widgets.MessageBox; import org.eclipse.swt.widgets.Sash; import org.eclipse.swt.widgets.ScrollBar; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Text; public class ImageAnalyzer { static ResourceBundle bundle = ResourceBundle.getBundle("examples_images"); Display display; Shell shell; Canvas imageCanvas, paletteCanvas; Label typeLabel, sizeLabel, depthLabel, transparentPixelLabel, timeToLoadLabel, screenSizeLabel, backgroundPixelLabel, locationLabel, disposalMethodLabel, delayTimeLabel, repeatCountLabel, compressionRatioLabel, paletteLabel, dataLabel, statusLabel; Combo backgroundCombo, imageTypeCombo, compressionCombo, scaleXCombo, scaleYCombo, alphaCombo; Button incrementalCheck, transparentCheck, maskCheck, backgroundCheck; Button previousButton, nextButton, animateButton; StyledText dataText; Sash sash; Color whiteColor, blackColor, redColor, greenColor, blueColor, canvasBackground; Font fixedWidthFont; Cursor crossCursor; GC imageCanvasGC; PrinterData printerData; int paletteWidth = 140; // recalculated and used as a width hint int ix = 0, iy = 0, py = 0; // used to scroll the image and palette int compression; // used to modify the compression ratio of the image float xscale = 1, yscale = 1; // used to scale the image int alpha = 255; // used to modify the alpha value of the image boolean incremental = false; // used to incrementally display an image boolean transparent = true; // used to display an image with transparency boolean showMask = false; // used to display an icon mask or transparent image mask boolean showBackground = false; // used to display the background of an animated image boolean animate = false; // used to animate a multi-image file Thread animateThread; // draws animated images Thread incrementalThread; // draws incremental images String lastPath; // used to seed the file dialog String currentName; // the current image file or URL name String fileName; // the current image file ImageLoader loader; // the loader for the current image file ImageData[] imageDataArray; // all image data read from the current file int imageDataIndex; // the index of the current image data ImageData imageData; // the currently-displayed image data Image image; // the currently-displayed image List<ImageLoaderEvent> incrementalEvents; // incremental image events long loadTime = 0; // the time it took to load the current image static final int INDEX_DIGITS = 4; static final int ALPHA_CHARS = 5; static final int ALPHA_CONSTANT = 0; static final int ALPHA_X = 1; static final int ALPHA_Y = 2; static final String[] OPEN_FILTER_EXTENSIONS = new String[] { "*.bmp;*.gif;*.ico;*.jfif;*.jpeg;*.jpg;*.png;*.tif;*.tiff", "*.bmp", "*.gif", "*.ico", "*.jpg;*.jpeg;*.jfif", "*.png", "*.tif;*.tiff" }; static final String[] OPEN_FILTER_NAMES = new String[] { bundle.getString("All_images") + " (bmp, gif, ico, jfif, jpeg, jpg, png, tif, tiff)", "BMP (*.bmp)", "GIF (*.gif)", "ICO (*.ico)", "JPEG (*.jpg, *.jpeg, *.jfif)", "PNG (*.png)", "TIFF (*.tif, *.tiff)" }; static final String[] SAVE_FILTER_EXTENSIONS = new String[] { "*.bmp", "*.bmp", "*.gif", "*.ico", "*.jpg", "*.png", "*.tif", "*.bmp" }; static final String[] SAVE_FILTER_NAMES = new String[] { "Uncompressed BMP (*.bmp)", "RLE Compressed BMP (*.bmp)", "GIF (*.gif)", "ICO (*.ico)", "JPEG (*.jpg)", "PNG (*.png)", "TIFF (*.tif)", "OS/2 BMP (*.bmp)" }; class TextPrompter extends Dialog { String message = ""; String result = null; Shell dialog; Text text; public TextPrompter(Shell parent, int style) { super(parent, style); } public TextPrompter(Shell parent) { this(parent, SWT.APPLICATION_MODAL); } public String getMessage() { return message; } public void setMessage(String string) { message = string; } public String open() { dialog = new Shell(getParent(), getStyle()); dialog.setText(getText()); dialog.setLayout(new GridLayout()); Label label = new Label(dialog, SWT.NONE); label.setText(message); label.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); text = new Text(dialog, SWT.SINGLE | SWT.BORDER); GridData data = new GridData(GridData.FILL_HORIZONTAL); data.widthHint = 300; text.setLayoutData(data); Composite buttons = new Composite(dialog, SWT.NONE); GridLayout grid = new GridLayout(); grid.numColumns = 2; buttons.setLayout(grid); buttons.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_END)); Button ok = new Button(buttons, SWT.PUSH); ok.setText(bundle.getString("OK")); data = new GridData(); data.widthHint = 75; ok.setLayoutData(data); ok.addSelectionListener(widgetSelectedAdapter(e -> { result = text.getText(); dialog.dispose(); })); Button cancel = new Button(buttons, SWT.PUSH); cancel.setText(bundle.getString("Cancel")); data = new GridData(); data.widthHint = 75; cancel.setLayoutData(data); cancel.addSelectionListener(widgetSelectedAdapter(e -> dialog.dispose())); dialog.setDefaultButton(ok); dialog.pack(); dialog.open(); while (!dialog.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } return result; } } public static void main(String[] args) { Display display = new Display(); ImageAnalyzer imageAnalyzer = new ImageAnalyzer(); Shell shell = imageAnalyzer.open(display); while (!shell.isDisposed()) if (!display.readAndDispatch()) display.sleep(); display.dispose(); } public Shell open(Display dpy) { // Create a window and set its title. this.display = dpy; shell = new Shell(display); shell.setText(bundle.getString("Image_analyzer")); // Hook resize and dispose listeners. shell.addControlListener(ControlListener.controlResizedAdapter(e -> resizeShell(e))); shell.addShellListener(ShellListener.shellClosedAdapter(e -> { animate = false; // stop any animation in progress if (animateThread != null) { // wait for the thread to die before disposing the shell. while (animateThread.isAlive()) { if (!display.readAndDispatch()) display.sleep(); } } e.doit = true; })); shell.addDisposeListener(e -> { // Clean up. if (image != null) image.dispose(); whiteColor.dispose(); blackColor.dispose(); redColor.dispose(); greenColor.dispose(); blueColor.dispose(); fixedWidthFont.dispose(); }); // Create colors and fonts. whiteColor = new Color(display, 255, 255, 255); blackColor = new Color(display, 0, 0, 0); redColor = new Color(display, 255, 0, 0); greenColor = new Color(display, 0, 255, 0); blueColor = new Color(display, 0, 0, 255); fixedWidthFont = new Font(display, "courier", 10, 0); crossCursor = display.getSystemCursor(SWT.CURSOR_CROSS); // Add a menu bar and widgets. createMenuBar(); createWidgets(); shell.pack(); // Create a GC for drawing, and hook the listener to dispose it. imageCanvasGC = new GC(imageCanvas); imageCanvas.addDisposeListener(e -> imageCanvasGC.dispose()); // Open the window shell.open(); return shell; } void createWidgets() { // Add the widgets to the shell in a grid layout. GridLayout layout = new GridLayout(); layout.marginHeight = 0; layout.numColumns = 2; shell.setLayout(layout); // Add a composite to contain some control widgets across the top. Composite controls = new Composite(shell, SWT.NONE); RowLayout rowLayout = new RowLayout(); rowLayout.marginTop = 5; rowLayout.marginBottom = 5; rowLayout.spacing = 8; controls.setLayout(rowLayout); GridData gridData = new GridData(); gridData.horizontalSpan = 2; controls.setLayoutData(gridData); // Combo to change the background. Group group = new Group(controls, SWT.NONE); group.setLayout(new RowLayout()); group.setText(bundle.getString("Background")); backgroundCombo = new Combo(group, SWT.DROP_DOWN | SWT.READ_ONLY); backgroundCombo.setItems(bundle.getString("None"), bundle.getString("White"), bundle.getString("Black"), bundle.getString("Red"), bundle.getString("Green"), bundle.getString("Blue")); backgroundCombo.select(backgroundCombo.indexOf(bundle.getString("White"))); backgroundCombo.addSelectionListener(widgetSelectedAdapter(event -> changeBackground())); // Combo to change the compression ratio. group = new Group(controls, SWT.NONE); group.setLayout(new GridLayout(3, true)); group.setText(bundle.getString("Save_group")); imageTypeCombo = new Combo(group, SWT.DROP_DOWN | SWT.READ_ONLY); String[] types = { "JPEG", "PNG", "GIF", "ICO", "TIFF", "BMP" }; for (String type : types) { imageTypeCombo.add(type); } imageTypeCombo.select(imageTypeCombo.indexOf("JPEG")); imageTypeCombo.addSelectionListener(widgetSelectedAdapter(event -> { int index = imageTypeCombo.getSelectionIndex(); switch (index) { case 0: compressionCombo.setEnabled(true); compressionRatioLabel.setEnabled(true); if (compressionCombo.getItemCount() == 100) break; compressionCombo.removeAll(); for (int i = 0; i < 100; i++) { compressionCombo.add(String.valueOf(i + 1)); } compressionCombo.select(compressionCombo.indexOf("75")); break; case 1: compressionCombo.setEnabled(true); compressionRatioLabel.setEnabled(true); if (compressionCombo.getItemCount() == 10) break; compressionCombo.removeAll(); for (int i = 0; i < 4; i++) { compressionCombo.add(String.valueOf(i)); } compressionCombo.select(0); break; case 2: case 3: case 4: case 5: compressionCombo.setEnabled(false); compressionRatioLabel.setEnabled(false); break; } })); imageTypeCombo.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false)); compressionRatioLabel = new Label(group, SWT.NONE); compressionRatioLabel.setText(bundle.getString("Compression")); compressionRatioLabel.setLayoutData(new GridData(SWT.CENTER, SWT.CENTER, false, false)); compressionCombo = new Combo(group, SWT.DROP_DOWN | SWT.READ_ONLY); for (int i = 0; i < 100; i++) { compressionCombo.add(String.valueOf(i + 1)); } compressionCombo.select(compressionCombo.indexOf("75")); compressionCombo.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false)); // Combo to change the x scale. String[] values = { "0.1", "0.2", "0.3", "0.4", "0.5", "0.6", "0.7", "0.8", "0.9", "1", "1.1", "1.2", "1.3", "1.4", "1.5", "1.6", "1.7", "1.8", "1.9", "2", "3", "4", "5", "6", "7", "8", "9", "10", }; group = new Group(controls, SWT.NONE); group.setLayout(new RowLayout()); group.setText(bundle.getString("X_scale")); scaleXCombo = new Combo(group, SWT.DROP_DOWN); for (String value : values) { scaleXCombo.add(value); } scaleXCombo.select(scaleXCombo.indexOf("1")); scaleXCombo.addSelectionListener(widgetSelectedAdapter(event -> scaleX())); // Combo to change the y scale. group = new Group(controls, SWT.NONE); group.setLayout(new RowLayout()); group.setText(bundle.getString("Y_scale")); scaleYCombo = new Combo(group, SWT.DROP_DOWN); for (String value : values) { scaleYCombo.add(value); } scaleYCombo.select(scaleYCombo.indexOf("1")); scaleYCombo.addSelectionListener(widgetSelectedAdapter(event -> scaleY())); // Combo to change the alpha value. group = new Group(controls, SWT.NONE); group.setLayout(new RowLayout()); group.setText(bundle.getString("Alpha_K")); alphaCombo = new Combo(group, SWT.DROP_DOWN | SWT.READ_ONLY); for (int i = 0; i <= 255; i += 5) { alphaCombo.add(String.valueOf(i)); } alphaCombo.select(alphaCombo.indexOf("255")); alphaCombo.addSelectionListener(widgetSelectedAdapter(event -> alpha())); // Check box to request incremental display. group = new Group(controls, SWT.NONE); group.setLayout(new RowLayout()); group.setText(bundle.getString("Display")); incrementalCheck = new Button(group, SWT.CHECK); incrementalCheck.setText(bundle.getString("Incremental")); incrementalCheck.setSelection(incremental); incrementalCheck.addSelectionListener( widgetSelectedAdapter(event -> incremental = ((Button) event.widget).getSelection())); // Check box to request transparent display. transparentCheck = new Button(group, SWT.CHECK); transparentCheck.setText(bundle.getString("Transparent")); transparentCheck.setSelection(transparent); transparentCheck.addSelectionListener(widgetSelectedAdapter(event -> { transparent = ((Button) event.widget).getSelection(); if (image != null) { imageCanvas.redraw(); } })); // Check box to request mask display. maskCheck = new Button(group, SWT.CHECK); maskCheck.setText(bundle.getString("Mask")); maskCheck.setSelection(showMask); maskCheck.addSelectionListener(widgetSelectedAdapter(event -> { showMask = ((Button) event.widget).getSelection(); if (image != null) { imageCanvas.redraw(); } })); // Check box to request background display. backgroundCheck = new Button(group, SWT.CHECK); backgroundCheck.setText(bundle.getString("Background")); backgroundCheck.setSelection(showBackground); backgroundCheck.addSelectionListener( widgetSelectedAdapter(event -> showBackground = ((Button) event.widget).getSelection())); // Group the animation buttons. group = new Group(controls, SWT.NONE); group.setLayout(new RowLayout()); group.setText(bundle.getString("Animation")); // Push button to display the previous image in a multi-image file. previousButton = new Button(group, SWT.PUSH); previousButton.setText(bundle.getString("Previous")); previousButton.setEnabled(false); previousButton.addSelectionListener(widgetSelectedAdapter(event -> previous())); // Push button to display the next image in a multi-image file. nextButton = new Button(group, SWT.PUSH); nextButton.setText(bundle.getString("Next")); nextButton.setEnabled(false); nextButton.addSelectionListener(widgetSelectedAdapter(event -> next())); // Push button to toggle animation of a multi-image file. animateButton = new Button(group, SWT.PUSH); animateButton.setText(bundle.getString("Animate")); animateButton.setEnabled(false); animateButton.addSelectionListener(widgetSelectedAdapter(event -> animate())); // Label to show the image file type. typeLabel = new Label(shell, SWT.NONE); typeLabel.setText(bundle.getString("Type_initial")); typeLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Canvas to show the image. imageCanvas = new Canvas(shell, SWT.V_SCROLL | SWT.H_SCROLL | SWT.NO_REDRAW_RESIZE | SWT.NO_BACKGROUND); imageCanvas.setBackground(whiteColor); imageCanvas.setCursor(crossCursor); gridData = new GridData(); gridData.verticalSpan = 15; gridData.horizontalAlignment = GridData.FILL; gridData.verticalAlignment = GridData.FILL; gridData.grabExcessHorizontalSpace = true; gridData.grabExcessVerticalSpace = true; imageCanvas.setLayoutData(gridData); imageCanvas.addPaintListener(event -> { if (image == null) { Rectangle bounds = imageCanvas.getBounds(); event.gc.fillRectangle(0, 0, bounds.width, bounds.height); } else { paintImage(event); } }); imageCanvas.addMouseMoveListener(event -> { if (image != null) { showColorAt(event.x, event.y); } }); // Set up the image canvas scroll bars. ScrollBar horizontal = imageCanvas.getHorizontalBar(); horizontal.setVisible(true); horizontal.setMinimum(0); horizontal.setEnabled(false); horizontal .addSelectionListener(widgetSelectedAdapter(event -> scrollHorizontally((ScrollBar) event.widget))); ScrollBar vertical = imageCanvas.getVerticalBar(); vertical.setVisible(true); vertical.setMinimum(0); vertical.setEnabled(false); vertical.addSelectionListener(widgetSelectedAdapter(event -> scrollVertically((ScrollBar) event.widget))); // Label to show the image size. sizeLabel = new Label(shell, SWT.NONE); sizeLabel.setText(bundle.getString("Size_initial")); sizeLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Label to show the image depth. depthLabel = new Label(shell, SWT.NONE); depthLabel.setText(bundle.getString("Depth_initial")); depthLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Label to show the transparent pixel. transparentPixelLabel = new Label(shell, SWT.NONE); transparentPixelLabel.setText(bundle.getString("Transparent_pixel_initial")); transparentPixelLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Label to show the time to load. timeToLoadLabel = new Label(shell, SWT.NONE); timeToLoadLabel.setText(bundle.getString("Time_to_load_initial")); timeToLoadLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Separate the animation fields from the rest of the fields. Label separator = new Label(shell, SWT.SEPARATOR | SWT.HORIZONTAL); separator.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Label to show the logical screen size for animation. screenSizeLabel = new Label(shell, SWT.NONE); screenSizeLabel.setText(bundle.getString("Animation_size_initial")); screenSizeLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Label to show the background pixel. backgroundPixelLabel = new Label(shell, SWT.NONE); backgroundPixelLabel.setText(bundle.getString("Background_pixel_initial")); backgroundPixelLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Label to show the image location (x, y). locationLabel = new Label(shell, SWT.NONE); locationLabel.setText(bundle.getString("Image_location_initial")); locationLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Label to show the image disposal method. disposalMethodLabel = new Label(shell, SWT.NONE); disposalMethodLabel.setText(bundle.getString("Disposal_initial")); disposalMethodLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Label to show the image delay time. delayTimeLabel = new Label(shell, SWT.NONE); delayTimeLabel.setText(bundle.getString("Delay_initial")); delayTimeLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Label to show the background pixel. repeatCountLabel = new Label(shell, SWT.NONE); repeatCountLabel.setText(bundle.getString("Repeats_initial")); repeatCountLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Separate the animation fields from the palette. separator = new Label(shell, SWT.SEPARATOR | SWT.HORIZONTAL); separator.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Label to show if the image has a direct or indexed palette. paletteLabel = new Label(shell, SWT.NONE); paletteLabel.setText(bundle.getString("Palette_initial")); paletteLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Canvas to show the image's palette. paletteCanvas = new Canvas(shell, SWT.BORDER | SWT.V_SCROLL | SWT.NO_REDRAW_RESIZE); paletteCanvas.setFont(fixedWidthFont); paletteCanvas.getVerticalBar().setVisible(true); gridData = new GridData(); gridData.horizontalAlignment = GridData.FILL; gridData.verticalAlignment = GridData.FILL; GC gc = new GC(paletteLabel); paletteWidth = gc.stringExtent(bundle.getString("Max_length_string")).x; gc.dispose(); gridData.widthHint = paletteWidth; gridData.heightHint = 16 * 11; // show at least 16 colors paletteCanvas.setLayoutData(gridData); paletteCanvas.addPaintListener(event -> { if (image != null) paintPalette(event); }); // Set up the palette canvas scroll bar. vertical = paletteCanvas.getVerticalBar(); vertical.setVisible(true); vertical.setMinimum(0); vertical.setIncrement(10); vertical.setEnabled(false); vertical.addSelectionListener(widgetSelectedAdapter(event -> scrollPalette((ScrollBar) event.widget))); // Sash to see more of image or image data. sash = new Sash(shell, SWT.HORIZONTAL); gridData = new GridData(); gridData.horizontalSpan = 2; gridData.horizontalAlignment = GridData.FILL; sash.setLayoutData(gridData); sash.addSelectionListener(widgetSelectedAdapter(event -> { if (event.detail != SWT.DRAG) { ((GridData) paletteCanvas.getLayoutData()).heightHint = SWT.DEFAULT; Rectangle paletteCanvasBounds = paletteCanvas.getBounds(); int minY = paletteCanvasBounds.y + 20; Rectangle dataLabelBounds = dataLabel.getBounds(); int maxY = statusLabel.getBounds().y - dataLabelBounds.height - 20; if (event.y > minY && event.y < maxY) { Rectangle oldSash = sash.getBounds(); sash.setBounds(event.x, event.y, event.width, event.height); int diff = event.y - oldSash.y; Rectangle bounds = imageCanvas.getBounds(); imageCanvas.setBounds(bounds.x, bounds.y, bounds.width, bounds.height + diff); bounds = paletteCanvasBounds; paletteCanvas.setBounds(bounds.x, bounds.y, bounds.width, bounds.height + diff); bounds = dataLabelBounds; dataLabel.setBounds(bounds.x, bounds.y + diff, bounds.width, bounds.height); bounds = dataText.getBounds(); dataText.setBounds(bounds.x, bounds.y + diff, bounds.width, bounds.height - diff); //shell.layout(true); } } })); // Label to show data-specific fields. dataLabel = new Label(shell, SWT.NONE); dataLabel.setText(bundle.getString("Pixel_data_initial")); gridData = new GridData(); gridData.horizontalSpan = 2; gridData.horizontalAlignment = GridData.FILL; dataLabel.setLayoutData(gridData); // Text to show a dump of the data. dataText = new StyledText(shell, SWT.BORDER | SWT.MULTI | SWT.READ_ONLY | SWT.V_SCROLL | SWT.H_SCROLL); dataText.setBackground(display.getSystemColor(SWT.COLOR_WIDGET_BACKGROUND)); dataText.setFont(fixedWidthFont); gridData = new GridData(); gridData.horizontalSpan = 2; gridData.horizontalAlignment = GridData.FILL; gridData.verticalAlignment = GridData.FILL; gridData.heightHint = 128; gridData.grabExcessVerticalSpace = true; dataText.setLayoutData(gridData); dataText.addMouseListener(MouseListener.mouseDownAdapter(event -> { if (image != null && event.button == 1) { showColorForData(); } })); dataText.addKeyListener(new KeyAdapter() { @Override public void keyPressed(KeyEvent event) { if (image != null) { showColorForData(); } } }); // Label to show status and cursor location in image. statusLabel = new Label(shell, SWT.NONE); statusLabel.setText(""); gridData = new GridData(); gridData.horizontalSpan = 2; gridData.horizontalAlignment = GridData.FILL; statusLabel.setLayoutData(gridData); } Menu createMenuBar() { // Menu bar. Menu menuBar = new Menu(shell, SWT.BAR); shell.setMenuBar(menuBar); createFileMenu(menuBar); createAlphaMenu(menuBar); return menuBar; } void createFileMenu(Menu menuBar) { // File menu MenuItem item = new MenuItem(menuBar, SWT.CASCADE); item.setText(bundle.getString("File")); Menu fileMenu = new Menu(shell, SWT.DROP_DOWN); item.setMenu(fileMenu); // File -> Open File... item = new MenuItem(fileMenu, SWT.PUSH); item.setText(bundle.getString("OpenFile")); item.setAccelerator(SWT.MOD1 + 'O'); item.addSelectionListener(widgetSelectedAdapter(event -> menuOpenFile())); // File -> Open URL... item = new MenuItem(fileMenu, SWT.PUSH); item.setText(bundle.getString("OpenURL")); item.setAccelerator(SWT.MOD1 + 'U'); item.addSelectionListener(widgetSelectedAdapter(event -> menuOpenURL())); // File -> Reopen item = new MenuItem(fileMenu, SWT.PUSH); item.setText(bundle.getString("Reopen")); item.addSelectionListener(widgetSelectedAdapter(event -> menuReopen())); new MenuItem(fileMenu, SWT.SEPARATOR); // File -> Load File... (natively) item = new MenuItem(fileMenu, SWT.PUSH); item.setText(bundle.getString("LoadFile")); item.setAccelerator(SWT.MOD1 + 'L'); item.addSelectionListener(widgetSelectedAdapter(event -> menuLoad())); new MenuItem(fileMenu, SWT.SEPARATOR); // File -> Save item = new MenuItem(fileMenu, SWT.PUSH); item.setText(bundle.getString("Save")); item.setAccelerator(SWT.MOD1 + 'S'); item.addSelectionListener(widgetSelectedAdapter(event -> menuSave())); // File -> Save As... item = new MenuItem(fileMenu, SWT.PUSH); item.setText(bundle.getString("Save_as")); item.addSelectionListener(widgetSelectedAdapter(event -> menuSaveAs())); // File -> Save Mask As... item = new MenuItem(fileMenu, SWT.PUSH); item.setText(bundle.getString("Save_mask_as")); item.addSelectionListener(widgetSelectedAdapter(event -> menuSaveMaskAs())); new MenuItem(fileMenu, SWT.SEPARATOR); // File -> Print item = new MenuItem(fileMenu, SWT.PUSH); item.setText(bundle.getString("Print")); item.setAccelerator(SWT.MOD1 + 'P'); item.addSelectionListener(widgetSelectedAdapter(event -> menuPrint())); new MenuItem(fileMenu, SWT.SEPARATOR); // File -> Exit item = new MenuItem(fileMenu, SWT.PUSH); item.setText(bundle.getString("Exit")); item.addSelectionListener(widgetSelectedAdapter(event -> shell.close())); } void createAlphaMenu(Menu menuBar) { // Alpha menu MenuItem item = new MenuItem(menuBar, SWT.CASCADE); item.setText(bundle.getString("Alpha")); Menu alphaMenu = new Menu(shell, SWT.DROP_DOWN); item.setMenu(alphaMenu); // Alpha -> K item = new MenuItem(alphaMenu, SWT.PUSH); item.setText("K"); item.addSelectionListener(widgetSelectedAdapter(event -> menuComposeAlpha(ALPHA_CONSTANT))); // Alpha -> (K + x) % 256 item = new MenuItem(alphaMenu, SWT.PUSH); item.setText("(K + x) % 256"); item.addSelectionListener(widgetSelectedAdapter(event -> menuComposeAlpha(ALPHA_X))); // Alpha -> (K + y) % 256 item = new MenuItem(alphaMenu, SWT.PUSH); item.setText("(K + y) % 256"); item.addSelectionListener(widgetSelectedAdapter(event -> menuComposeAlpha(ALPHA_Y))); } void menuComposeAlpha(int alpha_op) { if (image == null) return; animate = false; // stop any animation in progress Cursor waitCursor = display.getSystemCursor(SWT.CURSOR_WAIT); shell.setCursor(waitCursor); imageCanvas.setCursor(waitCursor); try { if (alpha_op == ALPHA_CONSTANT) { imageData.alpha = alpha; } else { imageData.alpha = -1; switch (alpha_op) { case ALPHA_X: for (int y = 0; y < imageData.height; y++) { for (int x = 0; x < imageData.width; x++) { imageData.setAlpha(x, y, (x + alpha) % 256); } } break; case ALPHA_Y: for (int y = 0; y < imageData.height; y++) { for (int x = 0; x < imageData.width; x++) { imageData.setAlpha(x, y, (y + alpha) % 256); } } break; default: break; } } displayImage(imageData); } finally { shell.setCursor(null); imageCanvas.setCursor(crossCursor); } } /* Just use Image(device, filename) to load an image file. */ void menuLoad() { animate = false; // stop any animation in progress // Get the user to choose an image file. FileDialog fileChooser = new FileDialog(shell, SWT.OPEN); if (lastPath != null) fileChooser.setFilterPath(lastPath); fileChooser.setFilterExtensions(OPEN_FILTER_EXTENSIONS); fileChooser.setFilterNames(OPEN_FILTER_NAMES); String filename = fileChooser.open(); lastPath = fileChooser.getFilterPath(); if (filename == null) return; Cursor waitCursor = display.getSystemCursor(SWT.CURSOR_WAIT); shell.setCursor(waitCursor); imageCanvas.setCursor(waitCursor); try { // Read the new image from the chosen file. long startTime = System.currentTimeMillis(); Image newImage = new Image(display, filename); loadTime = System.currentTimeMillis() - startTime; // don't include getImageData in load time imageData = newImage.getImageData(); // Cache the filename. currentName = filename; fileName = filename; // Fill in array and loader data. loader = new ImageLoader(); imageDataArray = new ImageData[] { imageData }; loader.data = imageDataArray; // Display the image. imageDataIndex = 0; displayImage(imageData); } catch (SWTException | SWTError | OutOfMemoryError e) { showErrorDialog(bundle.getString("Loading_lc"), filename, e); } finally { shell.setCursor(null); imageCanvas.setCursor(crossCursor); } } void menuOpenFile() { animate = false; // stop any animation in progress // Get the user to choose an image file. FileDialog fileChooser = new FileDialog(shell, SWT.OPEN); if (lastPath != null) fileChooser.setFilterPath(lastPath); fileChooser.setFilterExtensions(OPEN_FILTER_EXTENSIONS); fileChooser.setFilterNames(OPEN_FILTER_NAMES); String filename = fileChooser.open(); lastPath = fileChooser.getFilterPath(); if (filename == null) return; showFileType(filename); Cursor waitCursor = display.getSystemCursor(SWT.CURSOR_WAIT); shell.setCursor(waitCursor); imageCanvas.setCursor(waitCursor); ImageLoader oldLoader = loader; try { loader = new ImageLoader(); if (incremental) { // Prepare to handle incremental events. loader.addImageLoaderListener(event -> incrementalDataLoaded(event)); incrementalThreadStart(); } // Read the new image(s) from the chosen file. long startTime = System.currentTimeMillis(); imageDataArray = loader.load(filename); loadTime = System.currentTimeMillis() - startTime; if (imageDataArray.length > 0) { // Cache the filename. currentName = filename; fileName = filename; // If there are multiple images in the file (typically GIF) // then enable the Previous, Next and Animate buttons. previousButton.setEnabled(imageDataArray.length > 1); nextButton.setEnabled(imageDataArray.length > 1); animateButton.setEnabled(imageDataArray.length > 1 && loader.logicalScreenWidth > 0 && loader.logicalScreenHeight > 0); // Display the first image in the file. imageDataIndex = 0; displayImage(imageDataArray[imageDataIndex]); } } catch (SWTException | SWTError | OutOfMemoryError e) { showErrorDialog(bundle.getString("Loading_lc"), filename, e); loader = oldLoader; } finally { shell.setCursor(null); imageCanvas.setCursor(crossCursor); } } void menuOpenURL() { animate = false; // stop any animation in progress // Get the user to choose an image URL. TextPrompter textPrompter = new TextPrompter(shell, SWT.APPLICATION_MODAL | SWT.DIALOG_TRIM); textPrompter.setText(bundle.getString("OpenURLDialog")); textPrompter.setMessage(bundle.getString("EnterURL")); String urlname = textPrompter.open(); if (urlname == null) return; Cursor waitCursor = display.getSystemCursor(SWT.CURSOR_WAIT); shell.setCursor(waitCursor); imageCanvas.setCursor(waitCursor); ImageLoader oldLoader = loader; try { URL url = new URL(urlname); try (InputStream stream = url.openStream()) { loader = new ImageLoader(); if (incremental) { // Prepare to handle incremental events. loader.addImageLoaderListener(event -> incrementalDataLoaded(event)); incrementalThreadStart(); } // Read the new image(s) from the chosen URL. long startTime = System.currentTimeMillis(); imageDataArray = loader.load(stream); loadTime = System.currentTimeMillis() - startTime; } if (imageDataArray.length > 0) { currentName = urlname; fileName = null; // If there are multiple images (typically GIF) // then enable the Previous, Next and Animate buttons. previousButton.setEnabled(imageDataArray.length > 1); nextButton.setEnabled(imageDataArray.length > 1); animateButton.setEnabled(imageDataArray.length > 1 && loader.logicalScreenWidth > 0 && loader.logicalScreenHeight > 0); // Display the first image. imageDataIndex = 0; displayImage(imageDataArray[imageDataIndex]); } } catch (Exception | OutOfMemoryError e) { showErrorDialog(bundle.getString("Loading_lc"), urlname, e); loader = oldLoader; } finally { shell.setCursor(null); imageCanvas.setCursor(crossCursor); } } /* * Called to start a thread that draws incremental images * as they are loaded. */ void incrementalThreadStart() { incrementalEvents = new ArrayList<>(); incrementalThread = new Thread("Incremental") { @Override public void run() { // Draw the first ImageData increment. while (incrementalEvents != null) { // Synchronize so we don't try to remove when the vector is null. synchronized (ImageAnalyzer.this) { if (incrementalEvents != null) { if (incrementalEvents.size() > 0) { ImageLoaderEvent event = incrementalEvents.remove(0); if (image != null) image.dispose(); image = new Image(display, event.imageData); imageData = event.imageData; imageCanvasGC.drawImage(image, 0, 0, imageData.width, imageData.height, imageData.x, imageData.y, imageData.width, imageData.height); } else { yield(); } } } } display.wake(); } }; incrementalThread.setDaemon(true); incrementalThread.start(); } /* * Called when incremental image data has been loaded, * for example, for interlaced GIF/PNG or progressive JPEG. */ void incrementalDataLoaded(ImageLoaderEvent event) { // Synchronize so that we do not try to add while // the incremental drawing thread is removing. synchronized (this) { incrementalEvents.add(event); } } void menuSave() { if (image == null) return; animate = false; // stop any animation in progress // If the image file type is unknown, we can't 'Save', // so we have to use 'Save As...'. if (imageData.type == SWT.IMAGE_UNDEFINED || fileName == null) { menuSaveAs(); return; } Cursor waitCursor = display.getSystemCursor(SWT.CURSOR_WAIT); shell.setCursor(waitCursor); imageCanvas.setCursor(waitCursor); try { // Save the current image to the current file. loader.data = new ImageData[] { imageData }; if (imageData.type == SWT.IMAGE_JPEG) loader.compression = compressionCombo.indexOf(compressionCombo.getText()) + 1; if (imageData.type == SWT.IMAGE_PNG) loader.compression = compressionCombo.indexOf(compressionCombo.getText()); loader.save(fileName, imageData.type); } catch (SWTException | SWTError e) { showErrorDialog(bundle.getString("Saving_lc"), fileName, e); } finally { shell.setCursor(null); imageCanvas.setCursor(crossCursor); } } void menuSaveAs() { if (image == null) return; animate = false; // stop any animation in progress // Get the user to choose a file name and type to save. FileDialog fileChooser = new FileDialog(shell, SWT.SAVE); fileChooser.setFilterPath(lastPath); if (fileName != null) { String name = fileName; int nameStart = name.lastIndexOf(java.io.File.separatorChar); if (nameStart > -1) { name = name.substring(nameStart + 1); } fileChooser.setFileName( name.substring(0, name.indexOf(".")) + "." + imageTypeCombo.getText().toLowerCase()); } fileChooser.setFilterExtensions(SAVE_FILTER_EXTENSIONS); fileChooser.setFilterNames(SAVE_FILTER_NAMES); switch (imageTypeCombo.getSelectionIndex()) { case 0: fileChooser.setFilterIndex(4); break; case 1: fileChooser.setFilterIndex(5); break; case 2: fileChooser.setFilterIndex(2); break; case 3: fileChooser.setFilterIndex(3); break; case 4: fileChooser.setFilterIndex(6); break; case 5: fileChooser.setFilterIndex(0); break; } String filename = fileChooser.open(); lastPath = fileChooser.getFilterPath(); if (filename == null) return; // Figure out what file type the user wants saved. int filetype = fileChooser.getFilterIndex(); if (filetype == -1) { /* The platform file dialog does not support user-selectable file filters. * Determine the desired type by looking at the file extension. */ filetype = determineFileType(filename); if (filetype == SWT.IMAGE_UNDEFINED) { MessageBox box = new MessageBox(shell, SWT.ICON_ERROR); box.setMessage(createMsg(bundle.getString("Unknown_extension"), filename.substring(filename.lastIndexOf('.') + 1))); box.open(); return; } } if (new java.io.File(filename).exists()) { MessageBox box = new MessageBox(shell, SWT.ICON_QUESTION | SWT.OK | SWT.CANCEL); box.setMessage(createMsg(bundle.getString("Overwrite"), filename)); if (box.open() == SWT.CANCEL) return; } Cursor waitCursor = display.getSystemCursor(SWT.CURSOR_WAIT); shell.setCursor(waitCursor); imageCanvas.setCursor(waitCursor); try { // Save the current image to the specified file. boolean multi = false; if (loader.data.length > 1) { MessageBox box = new MessageBox(shell, SWT.ICON_QUESTION | SWT.YES | SWT.NO | SWT.CANCEL); box.setMessage(createMsg(bundle.getString("Save_all"), Integer.valueOf(loader.data.length))); int result = box.open(); if (result == SWT.CANCEL) return; if (result == SWT.YES) multi = true; } /* If the image has transparency but the user has transparency turned off, * turn it off in the saved image. */ int transparentPixel = imageData.transparentPixel; if (!multi && transparentPixel != -1 && !transparent) { imageData.transparentPixel = -1; } if (!multi) loader.data = new ImageData[] { imageData }; loader.compression = compressionCombo.indexOf(compressionCombo.getText()); loader.save(filename, filetype); /* Restore the previous transparency setting. */ if (!multi && transparentPixel != -1 && !transparent) { imageData.transparentPixel = transparentPixel; } // Update the shell title and file type label, // and use the new file. fileName = filename; shell.setText(createMsg(bundle.getString("Analyzer_on"), filename)); typeLabel.setText(createMsg(bundle.getString("Type_string"), fileTypeString(filetype))); } catch (SWTException | SWTError e) { showErrorDialog(bundle.getString("Saving_lc"), filename, e); } finally { shell.setCursor(null); imageCanvas.setCursor(crossCursor); } } void menuSaveMaskAs() { if (image == null || !showMask) return; if (imageData.getTransparencyType() == SWT.TRANSPARENCY_NONE) return; animate = false; // stop any animation in progress // Get the user to choose a file name and type to save. FileDialog fileChooser = new FileDialog(shell, SWT.SAVE); fileChooser.setFilterPath(lastPath); if (fileName != null) fileChooser.setFileName(fileName); fileChooser.setFilterExtensions(SAVE_FILTER_EXTENSIONS); fileChooser.setFilterNames(SAVE_FILTER_NAMES); String filename = fileChooser.open(); lastPath = fileChooser.getFilterPath(); if (filename == null) return; // Figure out what file type the user wants saved. int filetype = fileChooser.getFilterIndex(); if (filetype == -1) { /* The platform file dialog does not support user-selectable file filters. * Determine the desired type by looking at the file extension. */ filetype = determineFileType(filename); if (filetype == SWT.IMAGE_UNDEFINED) { MessageBox box = new MessageBox(shell, SWT.ICON_ERROR); box.setMessage(createMsg(bundle.getString("Unknown_extension"), filename.substring(filename.lastIndexOf('.') + 1))); box.open(); return; } } if (new java.io.File(filename).exists()) { MessageBox box = new MessageBox(shell, SWT.ICON_QUESTION | SWT.OK | SWT.CANCEL); box.setMessage(createMsg(bundle.getString("Overwrite"), filename)); if (box.open() == SWT.CANCEL) return; } Cursor waitCursor = display.getSystemCursor(SWT.CURSOR_WAIT); shell.setCursor(waitCursor); imageCanvas.setCursor(waitCursor); try { // Save the mask of the current image to the specified file. ImageData maskImageData = imageData.getTransparencyMask(); loader.data = new ImageData[] { maskImageData }; loader.save(filename, filetype); } catch (SWTException | SWTError e) { showErrorDialog(bundle.getString("Saving_lc"), filename, e); } finally { shell.setCursor(null); imageCanvas.setCursor(crossCursor); } } void menuPrint() { if (image == null) return; try { // Ask the user to specify the printer. PrintDialog dialog = new PrintDialog(shell, SWT.NONE); if (printerData != null) dialog.setPrinterData(printerData); printerData = dialog.open(); if (printerData == null) return; Printer printer = new Printer(printerData); Point screenDPI = display.getDPI(); Point printerDPI = printer.getDPI(); int scaleFactor = printerDPI.x / screenDPI.x; Rectangle trim = printer.computeTrim(0, 0, 0, 0); if (printer.startJob(currentName)) { if (printer.startPage()) { GC gc = new GC(printer); int transparentPixel = imageData.transparentPixel; if (transparentPixel != -1 && !transparent) { imageData.transparentPixel = -1; } Image printerImage = new Image(printer, imageData); gc.drawImage(printerImage, 0, 0, imageData.width, imageData.height, -trim.x, -trim.y, scaleFactor * imageData.width, scaleFactor * imageData.height); if (transparentPixel != -1 && !transparent) { imageData.transparentPixel = transparentPixel; } printerImage.dispose(); gc.dispose(); printer.endPage(); } printer.endJob(); } printer.dispose(); } catch (SWTError e) { MessageBox box = new MessageBox(shell, SWT.ICON_ERROR); box.setMessage(bundle.getString("Printing_error") + e.getMessage()); box.open(); } } void menuReopen() { if (currentName == null) return; animate = false; // stop any animation in progress Cursor waitCursor = display.getSystemCursor(SWT.CURSOR_WAIT); shell.setCursor(waitCursor); imageCanvas.setCursor(waitCursor); try { loader = new ImageLoader(); ImageData[] newImageData; if (fileName == null) { URL url = new URL(currentName); try (InputStream stream = url.openStream()) { long startTime = System.currentTimeMillis(); newImageData = loader.load(stream); loadTime = System.currentTimeMillis() - startTime; } } else { long startTime = System.currentTimeMillis(); newImageData = loader.load(fileName); loadTime = System.currentTimeMillis() - startTime; } imageDataIndex = 0; displayImage(newImageData[imageDataIndex]); } catch (Exception | OutOfMemoryError e) { showErrorDialog(bundle.getString("Reloading_lc"), currentName, e); } finally { shell.setCursor(null); imageCanvas.setCursor(crossCursor); } } void changeBackground() { String background = backgroundCombo.getText(); if (background.equals(bundle.getString("White"))) { imageCanvas.setBackground(whiteColor); } else if (background.equals(bundle.getString("Black"))) { imageCanvas.setBackground(blackColor); } else if (background.equals(bundle.getString("Red"))) { imageCanvas.setBackground(redColor); } else if (background.equals(bundle.getString("Green"))) { imageCanvas.setBackground(greenColor); } else if (background.equals(bundle.getString("Blue"))) { imageCanvas.setBackground(blueColor); } else { imageCanvas.setBackground(null); } } /* * Called when the ScaleX combo selection changes. */ void scaleX() { try { xscale = Float.parseFloat(scaleXCombo.getText()); } catch (NumberFormatException e) { xscale = 1; scaleXCombo.select(scaleXCombo.indexOf("1")); } if (image != null) { resizeScrollBars(); imageCanvas.redraw(); } } /* * Called when the ScaleY combo selection changes. */ void scaleY() { try { yscale = Float.parseFloat(scaleYCombo.getText()); } catch (NumberFormatException e) { yscale = 1; scaleYCombo.select(scaleYCombo.indexOf("1")); } if (image != null) { resizeScrollBars(); imageCanvas.redraw(); } } /* * Called when the Alpha combo selection changes. */ void alpha() { try { alpha = Integer.parseInt(alphaCombo.getText()); } catch (NumberFormatException e) { alphaCombo.select(alphaCombo.indexOf("255")); alpha = 255; } } /* * Called when the mouse moves in the image canvas. * Show the color of the image at the point under the mouse. */ void showColorAt(int mx, int my) { int x = mx - imageData.x - ix; int y = my - imageData.y - iy; showColorForPixel(x, y); } /* * Called when a mouse down or key press is detected * in the data text. Show the color of the pixel at * the caret position in the data text. */ void showColorForData() { int delimiterLength = dataText.getLineDelimiter().length(); int charactersPerLine = 6 + 3 * imageData.bytesPerLine + delimiterLength; int position = dataText.getCaretOffset(); int y = position / charactersPerLine; if ((position - y * charactersPerLine) < 6 || ((y + 1) * charactersPerLine - position) <= delimiterLength) { statusLabel.setText(""); return; } int dataPosition = position - 6 * (y + 1) - delimiterLength * y; int byteNumber = dataPosition / 3; int where = dataPosition - byteNumber * 3; int xByte = byteNumber % imageData.bytesPerLine; int x = -1; int depth = imageData.depth; if (depth == 1) { // 8 pixels per byte (can only show 3 of 8) if (where == 0) x = xByte * 8; if (where == 1) x = xByte * 8 + 3; if (where == 2) x = xByte * 8 + 7; } if (depth == 2) { // 4 pixels per byte (can only show 3 of 4) if (where == 0) x = xByte * 4; if (where == 1) x = xByte * 4 + 1; if (where == 2) x = xByte * 4 + 3; } if (depth == 4) { // 2 pixels per byte if (where == 0) x = xByte * 2; if (where == 1) x = xByte * 2; if (where == 2) x = xByte * 2 + 1; } if (depth == 8) { // 1 byte per pixel x = xByte; } if (depth == 16) { // 2 bytes per pixel x = xByte / 2; } if (depth == 24) { // 3 bytes per pixel x = xByte / 3; } if (depth == 32) { // 4 bytes per pixel x = xByte / 4; } if (x != -1) { showColorForPixel(x, y); } else { statusLabel.setText(""); } } /* * Set the status label to show color information * for the specified pixel in the image. */ void showColorForPixel(int x, int y) { if (x >= 0 && x < imageData.width && y >= 0 && y < imageData.height) { int pixel = imageData.getPixel(x, y); RGB rgb = imageData.palette.getRGB(pixel); boolean hasAlpha = false; int alphaValue = 0; if (imageData.alphaData != null && imageData.alphaData.length > 0) { hasAlpha = true; alphaValue = imageData.getAlpha(x, y); } String rgbMessageFormat = bundle.getString(hasAlpha ? "RGBA" : "RGB"); Object[] rgbArgs = { Integer.toString(rgb.red), Integer.toString(rgb.green), Integer.toString(rgb.blue), Integer.toString(alphaValue) }; Object[] rgbHexArgs = { Integer.toHexString(rgb.red), Integer.toHexString(rgb.green), Integer.toHexString(rgb.blue), Integer.toHexString(alphaValue) }; Object[] args = { Integer.valueOf(x), Integer.valueOf(y), Integer.valueOf(pixel), Integer.toHexString(pixel), createMsg(rgbMessageFormat, rgbArgs), createMsg(rgbMessageFormat, rgbHexArgs), (pixel == imageData.transparentPixel) ? bundle.getString("Color_at_transparent") : "" }; statusLabel.setText(createMsg(bundle.getString("Color_at"), args)); } else { statusLabel.setText(""); } } /* * Called when the Animate button is pressed. */ void animate() { animate = !animate; if (animate && image != null && imageDataArray.length > 1) { animateThread = new Thread(bundle.getString("Animation")) { @Override public void run() { // Pre-animation widget setup. preAnimation(); // Animate. try { animateLoop(); } catch (final SWTException e) { display.syncExec(() -> showErrorDialog( createMsg(bundle.getString("Creating_image"), Integer.valueOf(imageDataIndex + 1)), currentName, e)); } // Post animation widget reset. postAnimation(); } }; animateThread.setDaemon(true); animateThread.start(); } } /* * Loop through all of the images in a multi-image file * and display them one after another. */ void animateLoop() { // Create an off-screen image to draw on, and a GC to draw with. // Both are disposed after the animation. Image offScreenImage = new Image(display, loader.logicalScreenWidth, loader.logicalScreenHeight); GC offScreenImageGC = new GC(offScreenImage); try { // Use syncExec to get the background color of the imageCanvas. display.syncExec(() -> canvasBackground = imageCanvas.getBackground()); // Fill the off-screen image with the background color of the canvas. offScreenImageGC.setBackground(canvasBackground); offScreenImageGC.fillRectangle(0, 0, loader.logicalScreenWidth, loader.logicalScreenHeight); // Draw the current image onto the off-screen image. offScreenImageGC.drawImage(image, 0, 0, imageData.width, imageData.height, imageData.x, imageData.y, imageData.width, imageData.height); int repeatCount = loader.repeatCount; while (animate && (loader.repeatCount == 0 || repeatCount > 0)) { if (imageData.disposalMethod == SWT.DM_FILL_BACKGROUND) { // Fill with the background color before drawing. Color bgColor = null; int backgroundPixel = loader.backgroundPixel; if (showBackground && backgroundPixel != -1) { // Fill with the background color. RGB backgroundRGB = imageData.palette.getRGB(backgroundPixel); bgColor = new Color(null, backgroundRGB); } try { offScreenImageGC.setBackground(bgColor != null ? bgColor : canvasBackground); offScreenImageGC.fillRectangle(imageData.x, imageData.y, imageData.width, imageData.height); } finally { if (bgColor != null) bgColor.dispose(); } } else if (imageData.disposalMethod == SWT.DM_FILL_PREVIOUS) { // Restore the previous image before drawing. offScreenImageGC.drawImage(image, 0, 0, imageData.width, imageData.height, imageData.x, imageData.y, imageData.width, imageData.height); } // Get the next image data. imageDataIndex = (imageDataIndex + 1) % imageDataArray.length; imageData = imageDataArray[imageDataIndex]; image.dispose(); image = new Image(display, imageData); // Draw the new image data. offScreenImageGC.drawImage(image, 0, 0, imageData.width, imageData.height, imageData.x, imageData.y, imageData.width, imageData.height); // Draw the off-screen image to the screen. imageCanvasGC.drawImage(offScreenImage, 0, 0); // Sleep for the specified delay time before drawing again. try { Thread.sleep(visibleDelay(imageData.delayTime * 10)); } catch (InterruptedException e) { } // If we have just drawn the last image in the set, // then decrement the repeat count. if (imageDataIndex == imageDataArray.length - 1) repeatCount--; } } finally { offScreenImage.dispose(); offScreenImageGC.dispose(); } } /* * Pre animation setup. */ void preAnimation() { display.syncExec(() -> { // Change the label of the Animate button to 'Stop'. animateButton.setText(bundle.getString("Stop")); // Disable anything we don't want the user // to select during the animation. previousButton.setEnabled(false); nextButton.setEnabled(false); backgroundCombo.setEnabled(false); scaleXCombo.setEnabled(false); scaleYCombo.setEnabled(false); alphaCombo.setEnabled(false); incrementalCheck.setEnabled(false); transparentCheck.setEnabled(false); maskCheck.setEnabled(false); // leave backgroundCheck enabled // Reset the scale combos and scrollbars. resetScaleCombos(); resetScrollBars(); }); } /* * Post animation reset. */ void postAnimation() { display.syncExec(() -> { // Enable anything we disabled before the animation. previousButton.setEnabled(true); nextButton.setEnabled(true); backgroundCombo.setEnabled(true); scaleXCombo.setEnabled(true); scaleYCombo.setEnabled(true); alphaCombo.setEnabled(true); incrementalCheck.setEnabled(true); transparentCheck.setEnabled(true); maskCheck.setEnabled(true); // Reset the label of the Animate button. animateButton.setText(bundle.getString("Animate")); if (animate) { // If animate is still true, we finished the // full number of repeats. Leave the image as-is. animate = false; } else { // Redisplay the current image and its palette. displayImage(imageDataArray[imageDataIndex]); } }); } /* * Called when the Previous button is pressed. * Display the previous image in a multi-image file. */ void previous() { if (image != null && imageDataArray.length > 1) { if (imageDataIndex == 0) { imageDataIndex = imageDataArray.length; } imageDataIndex = imageDataIndex - 1; displayImage(imageDataArray[imageDataIndex]); } } /* * Called when the Next button is pressed. * Display the next image in a multi-image file. */ void next() { if (image != null && imageDataArray.length > 1) { imageDataIndex = (imageDataIndex + 1) % imageDataArray.length; displayImage(imageDataArray[imageDataIndex]); } } void displayImage(ImageData newImageData) { resetScaleCombos(); if (incremental && incrementalThread != null) { // Tell the incremental thread to stop drawing. synchronized (this) { incrementalEvents = null; } // Wait until the incremental thread is done. while (incrementalThread.isAlive()) { if (!display.readAndDispatch()) display.sleep(); } } // Dispose of the old image, if there was one. if (image != null) image.dispose(); try { // Cache the new image and imageData. image = new Image(display, newImageData); imageData = newImageData; } catch (SWTException e) { showErrorDialog(bundle.getString("Creating_from") + " ", currentName, e); image = null; return; } // Update the widgets with the new image info. String string = createMsg(bundle.getString("Analyzer_on"), currentName); shell.setText(string); if (imageDataArray.length > 1) { string = createMsg(bundle.getString("Type_index"), new Object[] { fileTypeString(imageData.type), Integer.valueOf(imageDataIndex + 1), Integer.valueOf(imageDataArray.length) }); } else { string = createMsg(bundle.getString("Type_string"), fileTypeString(imageData.type)); } typeLabel.setText(string); string = createMsg(bundle.getString("Size_value"), new Object[] { Integer.valueOf(imageData.width), Integer.valueOf(imageData.height) }); sizeLabel.setText(string); string = createMsg(bundle.getString("Depth_value"), new Object[] { Integer.valueOf(imageData.depth), Integer.valueOf(display.getDepth()) }); depthLabel.setText(string); string = createMsg(bundle.getString("Transparent_pixel_value"), pixelInfo(imageData.transparentPixel)); transparentPixelLabel.setText(string); string = createMsg(bundle.getString("Time_to_load_value"), Long.valueOf(loadTime)); timeToLoadLabel.setText(string); string = createMsg(bundle.getString("Animation_size_value"), new Object[] { Integer.valueOf(loader.logicalScreenWidth), Integer.valueOf(loader.logicalScreenHeight) }); screenSizeLabel.setText(string); string = createMsg(bundle.getString("Background_pixel_value"), pixelInfo(loader.backgroundPixel)); backgroundPixelLabel.setText(string); string = createMsg(bundle.getString("Image_location_value"), new Object[] { Integer.valueOf(imageData.x), Integer.valueOf(imageData.y) }); locationLabel.setText(string); string = createMsg(bundle.getString("Disposal_value"), new Object[] { Integer.valueOf(imageData.disposalMethod), disposalString(imageData.disposalMethod) }); disposalMethodLabel.setText(string); int delay = imageData.delayTime * 10; int delayUsed = visibleDelay(delay); if (delay != delayUsed) { string = createMsg(bundle.getString("Delay_value"), new Object[] { Integer.valueOf(delay), Integer.valueOf(delayUsed) }); } else { string = createMsg(bundle.getString("Delay_used"), Integer.valueOf(delay)); } delayTimeLabel.setText(string); if (loader.repeatCount == 0) { string = createMsg(bundle.getString("Repeats_forever"), Integer.valueOf(loader.repeatCount)); } else { string = createMsg(bundle.getString("Repeats_value"), Integer.valueOf(loader.repeatCount)); } repeatCountLabel.setText(string); if (imageData.palette.isDirect) { string = bundle.getString("Palette_direct"); } else { string = createMsg(bundle.getString("Palette_value"), Integer.valueOf(imageData.palette.getRGBs().length)); } paletteLabel.setText(string); string = createMsg(bundle.getString("Pixel_data_value"), new Object[] { Integer.valueOf(imageData.bytesPerLine), Integer.valueOf(imageData.scanlinePad), depthInfo(imageData.depth), (imageData.alphaData != null && imageData.alphaData.length > 0) ? bundle.getString("Scroll_for_alpha") : "" }); dataLabel.setText(string); String data = dataHexDump(dataText.getLineDelimiter()); dataText.setText(data); // bold the first column all the way down int index = 0; while ((index = data.indexOf(':', index + 1)) != -1) { int start = index - INDEX_DIGITS; int length = INDEX_DIGITS; if (Character.isLetter(data.charAt(index - 1))) { start = index - ALPHA_CHARS; length = ALPHA_CHARS; } dataText.setStyleRange( new StyleRange(start, length, dataText.getForeground(), dataText.getBackground(), SWT.BOLD)); } statusLabel.setText(""); // Redraw both canvases. resetScrollBars(); paletteCanvas.redraw(); imageCanvas.redraw(); } void paintImage(PaintEvent event) { GC gc = event.gc; Image paintImage = image; /* If the user wants to see the transparent pixel in its actual color, * then temporarily turn off transparency. */ int transparentPixel = imageData.transparentPixel; if (transparentPixel != -1 && !transparent) { imageData.transparentPixel = -1; paintImage = new Image(display, imageData); } /* Scale the image when drawing, using the user's selected scaling factor. */ int w = Math.round(imageData.width * xscale); int h = Math.round(imageData.height * yscale); /* If any of the background is visible, fill it with the background color. */ Rectangle bounds = imageCanvas.getBounds(); if (imageData.getTransparencyType() != SWT.TRANSPARENCY_NONE) { /* If there is any transparency at all, fill the whole background. */ gc.fillRectangle(0, 0, bounds.width, bounds.height); } else { /* Otherwise, just fill in the backwards L. */ if (ix + w < bounds.width) gc.fillRectangle(ix + w, 0, bounds.width - (ix + w), bounds.height); if (iy + h < bounds.height) gc.fillRectangle(0, iy + h, ix + w, bounds.height - (iy + h)); } /* Draw the image */ gc.drawImage(paintImage, 0, 0, imageData.width, imageData.height, ix + imageData.x, iy + imageData.y, w, h); /* If there is a mask and the user wants to see it, draw it. */ if (showMask && (imageData.getTransparencyType() != SWT.TRANSPARENCY_NONE)) { ImageData maskImageData = imageData.getTransparencyMask(); Image maskImage = new Image(display, maskImageData); gc.drawImage(maskImage, 0, 0, imageData.width, imageData.height, w + 10 + ix + imageData.x, iy + imageData.y, w, h); maskImage.dispose(); } /* If transparency was temporarily disabled, restore it. */ if (transparentPixel != -1 && !transparent) { imageData.transparentPixel = transparentPixel; paintImage.dispose(); } } void paintPalette(PaintEvent event) { GC gc = event.gc; gc.fillRectangle(paletteCanvas.getClientArea()); if (imageData.palette.isDirect) { // For a direct palette, display the masks. int y = py + 10; int xTab = 50; gc.drawString("rMsk", 10, y, true); gc.drawString(toHex4ByteString(imageData.palette.redMask), xTab, y, true); gc.drawString("gMsk", 10, y += 12, true); gc.drawString(toHex4ByteString(imageData.palette.greenMask), xTab, y, true); gc.drawString("bMsk", 10, y += 12, true); gc.drawString(toHex4ByteString(imageData.palette.blueMask), xTab, y, true); gc.drawString("rShf", 10, y += 12, true); gc.drawString(Integer.toString(imageData.palette.redShift), xTab, y, true); gc.drawString("gShf", 10, y += 12, true); gc.drawString(Integer.toString(imageData.palette.greenShift), xTab, y, true); gc.drawString("bShf", 10, y += 12, true); gc.drawString(Integer.toString(imageData.palette.blueShift), xTab, y, true); } else { // For an indexed palette, display the palette colors and indices. RGB[] rgbs = imageData.palette.getRGBs(); if (rgbs != null) { int xTab1 = 40, xTab2 = 100; for (int i = 0; i < rgbs.length; i++) { int y = (i + 1) * 10 + py; gc.drawString(String.valueOf(i), 10, y, true); gc.drawString(toHexByteString(rgbs[i].red) + toHexByteString(rgbs[i].green) + toHexByteString(rgbs[i].blue), xTab1, y, true); Color color = new Color(display, rgbs[i]); gc.setBackground(color); gc.fillRectangle(xTab2, y + 2, 10, 10); color.dispose(); } } } } void resizeShell(ControlEvent event) { if (image == null || shell.isDisposed()) return; resizeScrollBars(); } // Reset the scale combos to 1. void resetScaleCombos() { xscale = 1; yscale = 1; scaleXCombo.select(scaleXCombo.indexOf("1")); scaleYCombo.select(scaleYCombo.indexOf("1")); } // Reset the scroll bars to 0. void resetScrollBars() { if (image == null) return; ix = 0; iy = 0; py = 0; resizeScrollBars(); imageCanvas.getHorizontalBar().setSelection(0); imageCanvas.getVerticalBar().setSelection(0); paletteCanvas.getVerticalBar().setSelection(0); } void resizeScrollBars() { // Set the max and thumb for the image canvas scroll bars. ScrollBar horizontal = imageCanvas.getHorizontalBar(); ScrollBar vertical = imageCanvas.getVerticalBar(); Rectangle canvasBounds = imageCanvas.getClientArea(); int width = Math.round(imageData.width * xscale); if (width > canvasBounds.width) { // The image is wider than the canvas. horizontal.setEnabled(true); horizontal.setMaximum(width); horizontal.setThumb(canvasBounds.width); horizontal.setPageIncrement(canvasBounds.width); } else { // The canvas is wider than the image. horizontal.setEnabled(false); if (ix != 0) { // Make sure the image is completely visible. ix = 0; imageCanvas.redraw(); } } int height = Math.round(imageData.height * yscale); if (height > canvasBounds.height) { // The image is taller than the canvas. vertical.setEnabled(true); vertical.setMaximum(height); vertical.setThumb(canvasBounds.height); vertical.setPageIncrement(canvasBounds.height); } else { // The canvas is taller than the image. vertical.setEnabled(false); if (iy != 0) { // Make sure the image is completely visible. iy = 0; imageCanvas.redraw(); } } // Set the max and thumb for the palette canvas scroll bar. vertical = paletteCanvas.getVerticalBar(); if (imageData.palette.isDirect) { vertical.setEnabled(false); } else { // indexed palette canvasBounds = paletteCanvas.getClientArea(); int paletteHeight = imageData.palette.getRGBs().length * 10 + 20; // 10 pixels each index + 20 for margins. vertical.setEnabled(true); vertical.setMaximum(paletteHeight); vertical.setThumb(canvasBounds.height); vertical.setPageIncrement(canvasBounds.height); } } /* * Called when the image canvas' horizontal scrollbar is selected. */ void scrollHorizontally(ScrollBar scrollBar) { if (image == null) return; Rectangle canvasBounds = imageCanvas.getClientArea(); int width = Math.round(imageData.width * xscale); int height = Math.round(imageData.height * yscale); if (width > canvasBounds.width) { // Only scroll if the image is bigger than the canvas. int x = -scrollBar.getSelection(); if (x + width < canvasBounds.width) { // Don't scroll past the end of the image. x = canvasBounds.width - width; } imageCanvas.scroll(x, iy, ix, iy, width, height, false); ix = x; } } /* * Called when the image canvas' vertical scrollbar is selected. */ void scrollVertically(ScrollBar scrollBar) { if (image == null) return; Rectangle canvasBounds = imageCanvas.getClientArea(); int width = Math.round(imageData.width * xscale); int height = Math.round(imageData.height * yscale); if (height > canvasBounds.height) { // Only scroll if the image is bigger than the canvas. int y = -scrollBar.getSelection(); if (y + height < canvasBounds.height) { // Don't scroll past the end of the image. y = canvasBounds.height - height; } imageCanvas.scroll(ix, y, ix, iy, width, height, false); iy = y; } } /* * Called when the palette canvas' vertical scrollbar is selected. */ void scrollPalette(ScrollBar scrollBar) { if (image == null) return; Rectangle canvasBounds = paletteCanvas.getClientArea(); int paletteHeight = imageData.palette.getRGBs().length * 10 + 20; if (paletteHeight > canvasBounds.height) { // Only scroll if the palette is bigger than the canvas. int y = -scrollBar.getSelection(); if (y + paletteHeight < canvasBounds.height) { // Don't scroll past the end of the palette. y = canvasBounds.height - paletteHeight; } paletteCanvas.scroll(0, y, 0, py, paletteWidth, paletteHeight, false); py = y; } } /* * Return a String containing a line-by-line dump of * the data in the current imageData. The lineDelimiter * parameter must be a string of length 1 or 2. */ String dataHexDump(String lineDelimiter) { final int MAX_DUMP = 1024 * 1024; if (image == null) return ""; boolean truncated = false; char[] dump = null; byte[] alphas = imageData.alphaData; try { int length = imageData.height * (6 + 3 * imageData.bytesPerLine + lineDelimiter.length()); if (alphas != null && alphas.length > 0) { length += imageData.height * (6 + 3 * imageData.width + lineDelimiter.length()) + 6 + lineDelimiter.length(); } dump = new char[length]; } catch (OutOfMemoryError e) { /* Too much data to dump - truncate. */ dump = new char[MAX_DUMP]; truncated = true; } int index = 0; try { for (int i = 0; i < imageData.data.length; i++) { if (i % imageData.bytesPerLine == 0) { int line = i / imageData.bytesPerLine; dump[index++] = Character.forDigit(line / 1000 % 10, 10); dump[index++] = Character.forDigit(line / 100 % 10, 10); dump[index++] = Character.forDigit(line / 10 % 10, 10); dump[index++] = Character.forDigit(line % 10, 10); dump[index++] = ':'; dump[index++] = ' '; } byte b = imageData.data[i]; dump[index++] = Character.forDigit((b & 0xF0) >> 4, 16); dump[index++] = Character.forDigit(b & 0x0F, 16); dump[index++] = ' '; if ((i + 1) % imageData.bytesPerLine == 0) { dump[index++] = lineDelimiter.charAt(0); if (lineDelimiter.length() > 1) { dump[index++] = lineDelimiter.charAt(1); } } } if (alphas != null && alphas.length > 0) { dump[index++] = lineDelimiter.charAt(0); if (lineDelimiter.length() > 1) { dump[index++] = lineDelimiter.charAt(1); } System.arraycopy(new char[] { 'A', 'l', 'p', 'h', 'a', ':' }, 0, dump, index, 6); index += 6; dump[index++] = lineDelimiter.charAt(0); if (lineDelimiter.length() > 1) { dump[index++] = lineDelimiter.charAt(1); } for (int i = 0; i < alphas.length; i++) { if (i % imageData.width == 0) { int line = i / imageData.width; dump[index++] = Character.forDigit(line / 1000 % 10, 10); dump[index++] = Character.forDigit(line / 100 % 10, 10); dump[index++] = Character.forDigit(line / 10 % 10, 10); dump[index++] = Character.forDigit(line % 10, 10); dump[index++] = ':'; dump[index++] = ' '; } byte b = alphas[i]; dump[index++] = Character.forDigit((b & 0xF0) >> 4, 16); dump[index++] = Character.forDigit(b & 0x0F, 16); dump[index++] = ' '; if ((i + 1) % imageData.width == 0) { dump[index++] = lineDelimiter.charAt(0); if (lineDelimiter.length() > 1) { dump[index++] = lineDelimiter.charAt(1); } } } } } catch (IndexOutOfBoundsException e) { } String result = ""; try { result = new String(dump); } catch (OutOfMemoryError e) { /* Too much data to display in the text widget - truncate. */ result = new String(dump, 0, MAX_DUMP); truncated = true; } if (truncated) result += "\n ...data dump truncated at " + MAX_DUMP + "bytes..."; return result; } /* * Open an error dialog displaying the specified information. */ void showErrorDialog(String operation, String filename, Throwable e) { MessageBox box = new MessageBox(shell, SWT.ICON_ERROR); String message = createMsg(bundle.getString("Error"), new String[] { operation, filename }); String errorMessage = ""; if (e != null) { if (e instanceof SWTException) { SWTException swte = (SWTException) e; errorMessage = swte.getMessage(); if (swte.throwable != null) { errorMessage += ":\n" + swte.throwable.toString(); } } else if (e instanceof SWTError) { SWTError swte = (SWTError) e; errorMessage = swte.getMessage(); if (swte.throwable != null) { errorMessage += ":\n" + swte.throwable.toString(); } } else { errorMessage = e.toString(); } } box.setMessage(message + errorMessage); box.open(); } /* * Open a dialog asking the user for more information on the type of BMP file to save. */ int showBMPDialog() { final int[] bmpType = new int[1]; bmpType[0] = SWT.IMAGE_BMP; SelectionListener radioSelected = widgetSelectedAdapter(event -> { Button radio = (Button) event.widget; if (radio.getSelection()) bmpType[0] = ((Integer) radio.getData()).intValue(); }); // need to externalize strings final Shell dialog = new Shell(shell, SWT.DIALOG_TRIM); dialog.setText(bundle.getString("Save_as_type")); dialog.setLayout(new GridLayout()); Label label = new Label(dialog, SWT.NONE); label.setText(bundle.getString("Save_as_type_label")); Button radio = new Button(dialog, SWT.RADIO); radio.setText(bundle.getString("Save_as_type_no_compress")); radio.setSelection(true); radio.setData(Integer.valueOf(SWT.IMAGE_BMP)); radio.addSelectionListener(radioSelected); radio = new Button(dialog, SWT.RADIO); radio.setText(bundle.getString("Save_as_type_rle_compress")); radio.setData(Integer.valueOf(SWT.IMAGE_BMP_RLE)); radio.addSelectionListener(radioSelected); radio = new Button(dialog, SWT.RADIO); radio.setText(bundle.getString("Save_as_type_os2")); radio.setData(Integer.valueOf(SWT.IMAGE_OS2_BMP)); radio.addSelectionListener(radioSelected); label = new Label(dialog, SWT.SEPARATOR | SWT.HORIZONTAL); label.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); Button ok = new Button(dialog, SWT.PUSH); ok.setText(bundle.getString("OK")); GridData data = new GridData(); data.horizontalAlignment = SWT.CENTER; data.widthHint = 75; ok.setLayoutData(data); ok.addSelectionListener(widgetSelectedAdapter(e -> dialog.close())); dialog.pack(); dialog.open(); while (!dialog.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } return bmpType[0]; } /* * Return a String describing how to analyze the bytes * in the hex dump. */ static String depthInfo(int depth) { Object[] args = { Integer.valueOf(depth), "" }; switch (depth) { case 1: args[1] = createMsg(bundle.getString("Multi_pixels"), new Object[] { Integer.valueOf(8), " [01234567]" }); break; case 2: args[1] = createMsg(bundle.getString("Multi_pixels"), new Object[] { Integer.valueOf(4), "[00112233]" }); break; case 4: args[1] = createMsg(bundle.getString("Multi_pixels"), new Object[] { Integer.valueOf(2), "[00001111]" }); break; case 8: args[1] = bundle.getString("One_byte"); break; case 16: args[1] = createMsg(bundle.getString("Multi_bytes"), Integer.valueOf(2)); break; case 24: args[1] = createMsg(bundle.getString("Multi_bytes"), Integer.valueOf(3)); break; case 32: args[1] = createMsg(bundle.getString("Multi_bytes"), Integer.valueOf(4)); break; default: args[1] = bundle.getString("Unsupported_lc"); } return createMsg(bundle.getString("Depth_info"), args); } /* * Return the specified number of milliseconds. * If the specified number of milliseconds is too small * to see a visual change, then return a higher number. */ static int visibleDelay(int ms) { if (ms < 20) return ms + 30; if (ms < 30) return ms + 10; return ms; } /* * Return the specified byte value as a hex string, * preserving leading 0's. */ static String toHexByteString(int i) { if (i <= 0x0f) return "0" + Integer.toHexString(i); return Integer.toHexString(i & 0xff); } /* * Return the specified 4-byte value as a hex string, * preserving leading 0's. * (a bit 'brute force'... should probably use a loop...) */ static String toHex4ByteString(int i) { String hex = Integer.toHexString(i); if (hex.length() == 1) return "0000000" + hex; if (hex.length() == 2) return "000000" + hex; if (hex.length() == 3) return "00000" + hex; if (hex.length() == 4) return "0000" + hex; if (hex.length() == 5) return "000" + hex; if (hex.length() == 6) return "00" + hex; if (hex.length() == 7) return "0" + hex; return hex; } /* * Return a String describing the specified * transparent or background pixel. */ static String pixelInfo(int pixel) { if (pixel == -1) { return pixel + " (" + bundle.getString("None_lc") + ")"; } return pixel + " (0x" + Integer.toHexString(pixel) + ")"; } /* * Return a String describing the specified disposal method. */ static String disposalString(int disposalMethod) { switch (disposalMethod) { case SWT.DM_FILL_NONE: return bundle.getString("None_lc"); case SWT.DM_FILL_BACKGROUND: return bundle.getString("Background_lc"); case SWT.DM_FILL_PREVIOUS: return bundle.getString("Previous_lc"); } return bundle.getString("Unspecified_lc"); } /* * Return a String describing the specified image file type. */ String fileTypeString(int filetype) { if (filetype == SWT.IMAGE_BMP) return "BMP"; if (filetype == SWT.IMAGE_BMP_RLE) return "RLE" + imageData.depth + " BMP"; if (filetype == SWT.IMAGE_OS2_BMP) return "OS/2 BMP"; if (filetype == SWT.IMAGE_GIF) return "GIF"; if (filetype == SWT.IMAGE_ICO) return "ICO"; if (filetype == SWT.IMAGE_JPEG) return "JPEG"; if (filetype == SWT.IMAGE_PNG) return "PNG"; if (filetype == SWT.IMAGE_TIFF) return "TIFF"; return bundle.getString("Unknown_ac"); } /* * Return the specified file's image type, based on its extension. * Note that this is not a very robust way to determine image type, * and it is only to be used in the absence of any better method. */ int determineFileType(String filename) { String ext = filename.substring(filename.lastIndexOf('.') + 1); if (ext.equalsIgnoreCase("bmp")) { return showBMPDialog(); } if (ext.equalsIgnoreCase("gif")) return SWT.IMAGE_GIF; if (ext.equalsIgnoreCase("ico")) return SWT.IMAGE_ICO; if (ext.equalsIgnoreCase("jpg") || ext.equalsIgnoreCase("jpeg") || ext.equalsIgnoreCase("jfif")) return SWT.IMAGE_JPEG; if (ext.equalsIgnoreCase("png")) return SWT.IMAGE_PNG; if (ext.equalsIgnoreCase("tif") || ext.equalsIgnoreCase("tiff")) return SWT.IMAGE_TIFF; return SWT.IMAGE_UNDEFINED; } void showFileType(String filename) { String ext = filename.substring(filename.lastIndexOf('.') + 1); if (ext.equalsIgnoreCase("jpg") || ext.equalsIgnoreCase("jpeg") || ext.equalsIgnoreCase("jfif")) { imageTypeCombo.select(0); compressionCombo.setEnabled(true); compressionRatioLabel.setEnabled(true); if (compressionCombo.getItemCount() == 100) return; compressionCombo.removeAll(); for (int i = 0; i < 100; i++) { compressionCombo.add(String.valueOf(i + 1)); } compressionCombo.select(compressionCombo.indexOf("75")); return; } if (ext.equalsIgnoreCase("png")) { imageTypeCombo.select(1); compressionCombo.setEnabled(true); compressionRatioLabel.setEnabled(true); if (compressionCombo.getItemCount() == 10) return; compressionCombo.removeAll(); for (int i = 0; i < 4; i++) { compressionCombo.add(String.valueOf(i)); } compressionCombo.select(0); return; } if (ext.equalsIgnoreCase("bmp")) { imageTypeCombo.select(5); } if (ext.equalsIgnoreCase("gif")) { imageTypeCombo.select(2); } if (ext.equalsIgnoreCase("ico")) { imageTypeCombo.select(3); } if (ext.equalsIgnoreCase("tif") || ext.equalsIgnoreCase("tiff")) { imageTypeCombo.select(4); } compressionCombo.setEnabled(false); compressionRatioLabel.setEnabled(false); } static String createMsg(String msg, Object[] args) { MessageFormat formatter = new MessageFormat(msg); return formatter.format(args); } static String createMsg(String msg, Object arg) { MessageFormat formatter = new MessageFormat(msg); return formatter.format(new Object[] { arg }); } }