Another SWT Browser Demo
import java.io.IOException;
import java.io.InputStream;
import java.util.MissingResourceException;
import java.util.ResourceBundle;
import org.eclipse.swt.SWT;
import org.eclipse.swt.SWTError;
import org.eclipse.swt.browser.Browser;
import org.eclipse.swt.browser.CloseWindowListener;
import org.eclipse.swt.browser.LocationEvent;
import org.eclipse.swt.browser.LocationListener;
import org.eclipse.swt.browser.OpenWindowListener;
import org.eclipse.swt.browser.ProgressEvent;
import org.eclipse.swt.browser.ProgressListener;
import org.eclipse.swt.browser.StatusTextEvent;
import org.eclipse.swt.browser.StatusTextListener;
import org.eclipse.swt.browser.TitleEvent;
import org.eclipse.swt.browser.TitleListener;
import org.eclipse.swt.browser.VisibilityWindowListener;
import org.eclipse.swt.browser.WindowEvent;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.ImageData;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.FormAttachment;
import org.eclipse.swt.layout.FormData;
import org.eclipse.swt.layout.FormLayout;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.ProgressBar;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
import org.eclipse.swt.widgets.ToolBar;
import org.eclipse.swt.widgets.ToolItem;
public class SWTBrowserDemo {
int index;
boolean busy;
Image images[];
Image icon = null;
boolean title = false;
Composite parent;
Text locationBar;
Browser browser;
ToolBar toolbar;
Canvas canvas;
ToolItem itemBack, itemForward;
Label status;
ProgressBar progressBar;
SWTError error = null;
static final String[] imageLocations = { "eclipse01.bmp", "eclipse02.bmp",
"eclipse03.bmp", "eclipse04.bmp", "eclipse05.bmp", "eclipse06.bmp",
"eclipse07.bmp", "eclipse08.bmp", "eclipse09.bmp", "eclipse10.bmp",
"eclipse11.bmp", "eclipse12.bmp", };
static final String iconLocation = "document.gif";
public SWTBrowserDemo(Composite parent, boolean top) {
this.parent = parent;
try {
browser = new Browser(parent, SWT.BORDER);
} catch (SWTError e) {
error = e;
/* Browser widget could not be instantiated */
parent.setLayout(new FillLayout());
Label label = new Label(parent, SWT.CENTER | SWT.WRAP);
label.setText(getResourceString("BrowserNotCreated"));
parent.layout(true);
return;
}
initResources();
final Display display = parent.getDisplay();
browser.setData(
"org.eclipse.swt.examples.browserexample.BrowserApplication",
this);
browser.addOpenWindowListener(new OpenWindowListener() {
public void open(WindowEvent event) {
Shell shell = new Shell(display);
if (icon != null)
shell.setImage(icon);
shell.setLayout(new FillLayout());
SWTBrowserDemo app = new SWTBrowserDemo(shell, false);
app.setShellDecoration(icon, true);
event.browser = app.getBrowser();
}
});
if (top) {
browser.setUrl(getResourceString("Startup"));
show(false, null, null, true, true, true, true);
} else {
browser.addVisibilityWindowListener(new VisibilityWindowListener() {
public void hide(WindowEvent e) {
}
public void show(WindowEvent e) {
Browser browser = (Browser) e.widget;
SWTBrowserDemo app = (SWTBrowserDemo) browser
.getData("org.eclipse.swt.examples.browserexample.BrowserApplication");
app.show(true, e.location, e.size, e.addressBar, e.menuBar,
e.statusBar, e.toolBar);
}
});
browser.addCloseWindowListener(new CloseWindowListener() {
public void close(WindowEvent event) {
Browser browser = (Browser) event.widget;
Shell shell = browser.getShell();
shell.close();
}
});
}
}
/**
* Disposes of all resources associated with a particular instance of the
* BrowserApplication.
*/
public void dispose() {
freeResources();
}
/**
* Gets a string from the resource bundle. We don't want to crash because of
* a missing String. Returns the key if not found.
*/
static String getResourceString(String key) {
return key;
}
public SWTError getError() {
return error;
}
public Browser getBrowser() {
return browser;
}
public void setShellDecoration(Image icon, boolean title) {
this.icon = icon;
this.title = title;
}
void show(boolean owned, Point location, Point size, boolean addressBar,
boolean menuBar, boolean statusBar, boolean toolBar) {
final Shell shell = browser.getShell();
if (owned) {
if (location != null)
shell.setLocation(location);
if (size != null)
shell.setSize(shell.computeSize(size.x, size.y));
}
FormData data = null;
if (toolBar) {
toolbar = new ToolBar(parent, SWT.NONE);
data = new FormData();
data.top = new FormAttachment(0, 5);
toolbar.setLayoutData(data);
itemBack = new ToolItem(toolbar, SWT.PUSH);
itemBack.setText(getResourceString("Back"));
itemForward = new ToolItem(toolbar, SWT.PUSH);
itemForward.setText(getResourceString("Forward"));
final ToolItem itemStop = new ToolItem(toolbar, SWT.PUSH);
itemStop.setText(getResourceString("Stop"));
final ToolItem itemRefresh = new ToolItem(toolbar, SWT.PUSH);
itemRefresh.setText(getResourceString("Refresh"));
final ToolItem itemGo = new ToolItem(toolbar, SWT.PUSH);
itemGo.setText(getResourceString("Go"));
itemBack.setEnabled(browser.isBackEnabled());
itemForward.setEnabled(browser.isForwardEnabled());
Listener listener = new Listener() {
public void handleEvent(Event event) {
ToolItem item = (ToolItem) event.widget;
if (item == itemBack)
browser.back();
else if (item == itemForward)
browser.forward();
else if (item == itemStop)
browser.stop();
else if (item == itemRefresh)
browser.refresh();
else if (item == itemGo)
browser.setUrl(locationBar.getText());
}
};
itemBack.addListener(SWT.Selection, listener);
itemForward.addListener(SWT.Selection, listener);
itemStop.addListener(SWT.Selection, listener);
itemRefresh.addListener(SWT.Selection, listener);
itemGo.addListener(SWT.Selection, listener);
canvas = new Canvas(parent, SWT.NO_BACKGROUND);
data = new FormData();
data.width = 24;
data.height = 24;
data.top = new FormAttachment(0, 5);
data.right = new FormAttachment(100, -5);
canvas.setLayoutData(data);
final Rectangle rect = images[0].getBounds();
canvas.addListener(SWT.Paint, new Listener() {
public void handleEvent(Event e) {
Point pt = ((Canvas) e.widget).getSize();
e.gc.drawImage(images[index], 0, 0, rect.width,
rect.height, 0, 0, pt.x, pt.y);
}
});
canvas.addListener(SWT.MouseDown, new Listener() {
public void handleEvent(Event e) {
browser.setUrl(getResourceString("Startup"));
}
});
final Display display = parent.getDisplay();
display.asyncExec(new Runnable() {
public void run() {
if (canvas.isDisposed())
return;
if (busy) {
index++;
if (index == images.length)
index = 0;
canvas.redraw();
}
display.timerExec(150, this);
}
});
}
if (addressBar) {
locationBar = new Text(parent, SWT.BORDER);
data = new FormData();
if (toolbar != null) {
data.top = new FormAttachment(toolbar, 0, SWT.TOP);
data.left = new FormAttachment(toolbar, 5, SWT.RIGHT);
data.right = new FormAttachment(canvas, -5, SWT.DEFAULT);
} else {
data.top = new FormAttachment(0, 0);
data.left = new FormAttachment(0, 0);
data.right = new FormAttachment(100, 0);
}
locationBar.setLayoutData(data);
locationBar.addListener(SWT.DefaultSelection, new Listener() {
public void handleEvent(Event e) {
browser.setUrl(locationBar.getText());
}
});
}
if (statusBar) {
status = new Label(parent, SWT.NONE);
progressBar = new ProgressBar(parent, SWT.NONE);
data = new FormData();
data.left = new FormAttachment(0, 5);
data.right = new FormAttachment(progressBar, 0, SWT.DEFAULT);
data.bottom = new FormAttachment(100, -5);
status.setLayoutData(data);
data = new FormData();
data.right = new FormAttachment(100, -5);
data.bottom = new FormAttachment(100, -5);
progressBar.setLayoutData(data);
browser.addStatusTextListener(new StatusTextListener() {
public void changed(StatusTextEvent event) {
status.setText(event.text);
}
});
}
parent.setLayout(new FormLayout());
Control aboveBrowser = toolBar ? (Control) canvas
: (addressBar ? (Control) locationBar : null);
data = new FormData();
data.left = new FormAttachment(0, 0);
data.top = aboveBrowser != null ? new FormAttachment(aboveBrowser, 5,
SWT.DEFAULT) : new FormAttachment(0, 0);
data.right = new FormAttachment(100, 0);
data.bottom = status != null ? new FormAttachment(status, -5,
SWT.DEFAULT) : new FormAttachment(100, 0);
browser.setLayoutData(data);
if (statusBar || toolBar) {
browser.addProgressListener(new ProgressListener() {
public void changed(ProgressEvent event) {
if (event.total == 0)
return;
int ratio = event.current * 100 / event.total;
if (progressBar != null)
progressBar.setSelection(ratio);
busy = event.current != event.total;
if (!busy) {
index = 0;
if (canvas != null)
canvas.redraw();
}
}
public void completed(ProgressEvent event) {
if (progressBar != null)
progressBar.setSelection(0);
busy = false;
index = 0;
if (canvas != null) {
itemBack.setEnabled(browser.isBackEnabled());
itemForward.setEnabled(browser.isForwardEnabled());
canvas.redraw();
}
}
});
}
if (addressBar || statusBar || toolBar) {
browser.addLocationListener(new LocationListener() {
public void changed(LocationEvent event) {
busy = true;
if (event.top && locationBar != null)
locationBar.setText(event.location);
}
public void changing(LocationEvent event) {
}
});
}
if (title) {
browser.addTitleListener(new TitleListener() {
public void changed(TitleEvent event) {
shell.setText(event.title + " - "
+ getResourceString("window.title"));
}
});
}
parent.layout(true);
if (owned)
shell.open();
}
/**
* Grabs input focus.
*/
public void focus() {
if (locationBar != null)
locationBar.setFocus();
else if (browser != null)
browser.setFocus();
else
parent.setFocus();
}
/**
* Frees the resources
*/
void freeResources() {
if (images != null) {
for (int i = 0; i < images.length; ++i) {
final Image image = images[i];
if (image != null)
image.dispose();
}
images = null;
}
}
/**
* Loads the resources
*/
void initResources() {
final Class clazz = this.getClass();
try {
if (images == null) {
images = new Image[imageLocations.length];
for (int i = 0; i < imageLocations.length; ++i) {
InputStream sourceStream = clazz
.getResourceAsStream(imageLocations[i]);
ImageData source = new ImageData(sourceStream);
ImageData mask = source.getTransparencyMask();
images[i] = new Image(null, source, mask);
try {
sourceStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return;
} catch (Throwable t) {
}
String error = "Unable to load resources";
freeResources();
throw new RuntimeException(error);
}
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
shell.setText(getResourceString("window.title"));
InputStream stream = SWTBrowserDemo.class
.getResourceAsStream(iconLocation);
Image icon = new Image(display, stream);
shell.setImage(icon);
try {
stream.close();
} catch (IOException e) {
e.printStackTrace();
}
SWTBrowserDemo app = new SWTBrowserDemo(shell, true);
app.setShellDecoration(icon, true);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
icon.dispose();
app.dispose();
display.dispose();
}
}
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