Java tutorial
/******************************************************************************* * Copyright (c) 2005-2008 Polarion Software. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * Alexander Gurov - Initial API and implementation *******************************************************************************/ package org.eclipse.team.svn.ui.dialog; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.resource.ImageDescriptor; import org.eclipse.jface.resource.JFaceResources; import org.eclipse.jface.window.Window; import org.eclipse.swt.SWT; import org.eclipse.swt.events.DisposeEvent; import org.eclipse.swt.events.DisposeListener; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.graphics.Color; import org.eclipse.swt.graphics.Cursor; import org.eclipse.swt.graphics.Font; import org.eclipse.swt.graphics.FontData; import org.eclipse.swt.graphics.FontMetrics; import org.eclipse.swt.graphics.GC; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Listener; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.ToolBar; import org.eclipse.swt.widgets.ToolItem; import org.eclipse.team.svn.ui.SVNTeamUIPlugin; import org.eclipse.team.svn.ui.panel.IDialogManager; import org.eclipse.team.svn.ui.panel.IDialogPanel; import org.eclipse.team.svn.ui.utility.UIMonitorUtility; import org.eclipse.ui.PlatformUI; /** * Default dialog implementation * * @author Alexander Gurov */ public class DefaultDialog extends MessageDialog implements IDialogManager { public static final int DIALOG_FAILED = -1; public static final int BUTTON_WIDTH = 76; protected Listener keyListener; protected IDialogPanel panel; protected Control infoPanel; protected Font mainLabelFont; protected Label message; protected Label icon; protected Image infoImage; protected Image levelOkImage; protected Image levelWarningImage; protected Image levelErrorImage; protected Composite mainComposite; public DefaultDialog(Shell parentShell, IDialogPanel panel) { super(parentShell, panel.getDialogTitle(), null, null, MessageDialog.NONE, panel.getButtonNames(), 0); this.setShellStyle(this.getShellStyle() | SWT.RESIZE); this.panel = panel; this.levelOkImage = this.findImage("icons/common/level_ok.gif"); //$NON-NLS-1$ this.levelWarningImage = this.findImage("icons/common/level_warning.gif"); //$NON-NLS-1$ this.levelErrorImage = this.findImage("icons/common/level_error.gif"); //$NON-NLS-1$ } public static int convertHeightInCharsToPixels(Control control, int chars) { GC gc = new GC(control); gc.setFont(JFaceResources.getDialogFont()); FontMetrics fontMetrics = gc.getFontMetrics(); gc.dispose(); return fontMetrics.getHeight() * chars; } public static int computeButtonWidth(Button button) { int width = button.computeSize(SWT.DEFAULT, SWT.DEFAULT).x + 6; return Math.max(width, DefaultDialog.BUTTON_WIDTH); } public void setButtonEnabled(int idx, boolean enabled) { this.getButton(idx).setEnabled(enabled); } public boolean isButtonEnabled(int idx) { return this.getButton(idx).getEnabled(); } public void setMessage(int level, String message) { Image img = this.levelOkImage; switch (level) { case IDialogManager.LEVEL_ERROR: { img = this.levelErrorImage; break; } case IDialogManager.LEVEL_WARNING: { img = this.levelWarningImage; break; } } if (message == null) { message = this.panel.getDefaultMessage(); } this.message.setText(message == null ? "" : message); //$NON-NLS-1$ this.icon.setImage(img); } public int open() { try { this.setReturnCode(DefaultDialog.DIALOG_FAILED); return super.open(); } finally { this.dispose(); } } public void forceClose(int buttonID) { if (this.isButtonEnabled(buttonID)) { this.buttonPressed(buttonID); } } protected void dispose() { if (this.panel != null) { this.panel.dispose(); } if (this.mainLabelFont != null) { this.mainLabelFont.dispose(); } if (this.infoImage != null) { this.infoImage.dispose(); } if (this.levelOkImage != null) { this.levelOkImage.dispose(); } if (this.levelWarningImage != null) { this.levelWarningImage.dispose(); } if (this.levelErrorImage != null) { this.levelErrorImage.dispose(); } } protected void buttonPressed(int buttonId) { if (buttonId != IDialogConstants.CANCEL_ID) { this.panel.buttonPressed(buttonId); } super.buttonPressed(buttonId); } protected Control createContents(Composite parent) { GridLayout layout = null; GridData data = null; this.mainComposite = new Composite(parent, SWT.NONE); layout = new GridLayout(); layout.marginHeight = 0; layout.marginWidth = 0; layout.verticalSpacing = 0; this.mainComposite.setLayout(layout); data = new GridData(GridData.FILL_BOTH); this.mainComposite.setLayoutData(data); Dialog.applyDialogFont(this.mainComposite); this.initializeDialogUnits(this.mainComposite); this.infoPanel = this.createInfoPanel(this.mainComposite); this.dialogArea = this.createMainPanel(this.mainComposite); this.createBottomPanel(this.mainComposite); //computing the best size for the dialog Point defaultSize = this.dialogArea.getShell().computeSize(SWT.DEFAULT, SWT.DEFAULT, true); data = (GridData) this.dialogArea.getLayoutData(); int defaultHeightHint = data.heightHint; data.heightHint = this.panel.getPrefferedSize().y; this.dialogArea.setLayoutData(data); Point prefferedSize = this.dialogArea.getShell().computeSize(SWT.DEFAULT, SWT.DEFAULT, true); if (prefferedSize.y < defaultSize.y) { data.heightHint = defaultHeightHint; this.dialogArea.setLayoutData(data); } this.panel.initPanel(this); this.panel.addListeners(); this.panel.postInit(); String hId = this.panel.getHelpId(); if (hId != null) { PlatformUI.getWorkbench().getHelpSystem().setHelp(this.mainComposite, hId); } return this.mainComposite; } public void create() { super.create(); this.getShell().getDisplay().addFilter(SWT.KeyDown, this.keyListener = new Listener() { public void handleEvent(Event event) { if (event.stateMask == SWT.CTRL && event.keyCode == SWT.CR) { DefaultDialog.this.forceClose(IDialogConstants.OK_ID); event.doit = false; } } }); } public boolean close() { if (this.keyListener != null) { this.getShell().getDisplay().removeFilter(SWT.KeyDown, this.keyListener); } // ESC pressed? (ESC handling is hardcoded in SWT and corresponding event is not translated to the user nor as "KeyEvent" nor as "button pressed") if (this.getReturnCode() == Window.CANCEL) { this.panel.buttonPressed(IDialogConstants.CANCEL_ID); } return this.panel.canClose() && super.close(); } protected Control createInfoPanel(Composite parent) { Color bgColor = new Color(null, 255, 255, 255); GridLayout layout = null; GridData data = null; Composite infoPanel = new Composite(parent, SWT.NONE); layout = new GridLayout(); layout.marginHeight = 1; layout.marginWidth = 1; layout.numColumns = 2; infoPanel.setLayout(layout); data = new GridData(GridData.FILL_HORIZONTAL); Point pt = this.panel.getPrefferedSize(); data.widthHint = pt.x; infoPanel.setLayoutData(data); infoPanel.setBackground(bgColor); Composite leftSide = new Composite(infoPanel, SWT.NONE); layout = new GridLayout(); layout.numColumns = 2; layout.horizontalSpacing = 1; leftSide.setLayout(layout); data = new GridData(GridData.FILL_BOTH); leftSide.setLayoutData(data); leftSide.setBackground(bgColor); Label iconLabel = new Label(infoPanel, SWT.NONE); this.infoImage = this.findImage(this.panel.getImagePath()); iconLabel.setImage(this.infoImage); Font defaultFont = JFaceResources.getBannerFont(); FontData[] fData = defaultFont.getFontData(); this.mainLabelFont = new Font(UIMonitorUtility.getDisplay(), fData); Label description = new Label(leftSide, SWT.WRAP); data = new GridData(GridData.FILL_HORIZONTAL); data.horizontalSpan = 2; description.setLayoutData(data); String text = this.panel.getDialogDescription(); description.setText(text != null ? text : ""); //$NON-NLS-1$ description.setFont(this.mainLabelFont); description.setBackground(bgColor); this.icon = new Label(leftSide, SWT.NONE); data = new GridData(); data.verticalAlignment = SWT.BEGINNING; this.icon.setLayoutData(data); this.icon.setBackground(bgColor); this.message = new Label(leftSide, SWT.WRAP); data = new GridData(GridData.FILL_BOTH); data.horizontalIndent = 3; this.message.setLayoutData(data); this.message.setBackground(bgColor); this.setMessage(IDialogManager.LEVEL_OK, null); return infoPanel; } protected Control createMainPanel(Composite parent) { GridLayout layout = null; GridData data = null; Composite fullSizePanel = new Composite(parent, SWT.NONE); layout = new GridLayout(); layout.marginHeight = 0; layout.marginWidth = 0; fullSizePanel.setLayout(layout); data = new GridData(GridData.FILL_BOTH); fullSizePanel.setLayoutData(data); Label separator = new Label(fullSizePanel, SWT.HORIZONTAL | SWT.SEPARATOR); separator.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); Composite customPanel = new Composite(fullSizePanel, SWT.NONE); layout = new GridLayout(); layout.marginHeight = 7; layout.marginWidth = 7; customPanel.setLayout(layout); data = new GridData(GridData.FILL_BOTH); Point pt = this.panel.getPrefferedSize(); data.widthHint = pt.x; customPanel.setLayoutData(data); separator = new Label(fullSizePanel, SWT.HORIZONTAL | SWT.SEPARATOR); separator.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); this.panel.createControls(customPanel); return customPanel; } protected Control createBottomPanel(Composite parent) { GridLayout layout = null; GridData data = null; Composite composite = new Composite(parent, SWT.NONE); layout = new GridLayout(); layout.marginHeight = 7; layout.marginWidth = 7; layout.numColumns = 2; layout.horizontalSpacing = 0; composite.setLayout(layout); data = new GridData(GridData.FILL_HORIZONTAL); composite.setLayoutData(data); this.createHelpImageButton(composite); this.buttonBar = this.createButtonPanel(composite); ((GridData) this.buttonBar.getLayoutData()).horizontalIndent = 7; return composite; } protected ToolBar createHelpImageButton(Composite parent) { ToolBar toolBar = new ToolBar(parent, SWT.FLAT | SWT.NO_FOCUS); ((GridLayout) parent.getLayout()).numColumns++; toolBar.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_CENTER)); final Cursor cursor = new Cursor(parent.getDisplay(), SWT.CURSOR_HAND); toolBar.setCursor(cursor); toolBar.addDisposeListener(new DisposeListener() { public void widgetDisposed(DisposeEvent e) { cursor.dispose(); } }); ToolItem item = new ToolItem(toolBar, SWT.NONE); item.setImage(JFaceResources.getImage(DLG_IMG_HELP)); item.setToolTipText(JFaceResources.getString("helpToolTip")); //$NON-NLS-1$ item.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { DefaultDialog.this.mainComposite.notifyListeners(SWT.Help, new Event()); } }); return toolBar; } protected Control createButtonPanel(Composite parent) { GridLayout layout = null; GridData data = null; Composite buttonPanel = new Composite(parent, SWT.NONE); layout = new GridLayout(); layout.marginHeight = 0; layout.marginWidth = 0; buttonPanel.setLayout(layout); data = new GridData(GridData.FILL_HORIZONTAL); data.horizontalAlignment = SWT.RIGHT; buttonPanel.setLayoutData(data); return this.createButtonBar(buttonPanel); } protected Image findImage(String imagePath) { SVNTeamUIPlugin plugin = SVNTeamUIPlugin.instance(); ImageDescriptor descriptor = plugin .getImageDescriptor(imagePath == null ? "icons/wizards/newconnect.gif" : imagePath); //$NON-NLS-1$ if (descriptor == null) { descriptor = ImageDescriptor.getMissingImageDescriptor(); } return descriptor.createImage(); } }