SWT(JFace) 简易浏览器 制作实现代码第1/2页

BrowserExample.java

复制代码 代码如下:

package swt_jface.demo5;

import java.text.MessageFormat;

import java.util.MissingResourceException;

import org.eclipse.swt.SWT;

import org.eclipse.swt.SWTError;

import org.eclipse.swt.browser.Browser;

import org.ecliwww.devze.compse.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 or编程客栈g.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.Point;

import org.eclipse.swt.graphics.Rectangle;

imHdyisport 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.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 BrowserExample {

//static ResourceBundle resourceBundle = ResourceBundle.getBundle("examples_browser");

int index;

boolean busy;

Image images[];

Text location;

Browser browser;

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 BrowserExample(Composite parent) {

final Display display = parent.getDisplay();

FormLayout layout = new FormLayout();

parent.setLayout(layout);

ToolBar toolbar = new ToolBar(parent, SWT.NONE);

final ToolItem itemBack = new ToolItem(toolbar, SWT.PUSH);

itemBack.setText(getResourceString("Back"));

final ToolItem 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"));

location = new Text(parent, SWT.BORDER);

images = new Image[]{new Image(display, "C:/icons/web/go.gif")};

final Canvas canvas = new Canvas(parent, SWT.NO_BACKGROUND);

final Rectangle rect = images[0].getBounds();

canvas.addListener(SWT.Paint, new Listener() {

public void handleEvent(Event e) {

Point pt = canvas.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"));

}

});

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);

}

});

final Label status = new Label(parent, SWT.NONE);

final ProgressBar progressBar = new ProgressBar(parent, SWT.NONE);

FormData data = new FormData();

data.top = new FormAttachment(0, 5);

toolbar.setLayoutData(data);

data = new FormData();

data.left = new FormAttachment(0, 0);

data.right = new FormAttachment(100, 0);

data.top = new FormAttachment(canvas, 5, SWT.DEFAULT);

data.bottom = new FormAttachment(status, -5, SWT.DEFAULT);

try {

browser = new Browser(parent, SWT.NONE);

browser.setLayoutData(data);

} catch (SWTError e) {

Label label = new Label(parent, SWT.CENTER | SWT.WRAP);

label.setText(getResourceString("BrowserNotCreated"));

label.setLayoutData(data);

}

data = new FormData();

data.width = 24;

data.height = 24;

data.top = new FormAttachment(0, 5);

data.right = new FormAttachment(100, -5);

canvas.setLayoutData(data);

data = new FormData();

data.top = new FormAttachment(toolbar, 0, SWT.TOP); www.devze.com

data.left = new FormAttachment(toolbar, 5, SWT.RIGHT);

data.right = new FormAttachment(canvas, -5, SWT.DEFAULT);

location.setLayoutData(data);

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);

if (browser != null) {

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编程客栈 (item == itemStop) browser.stop();

else if (item == itemRefresh) browser.refresh();

else if (item == itemGo) browser.setUrl(location.getText());

}

};

browser.addLocationListener(new LocationListener() {

public void changed(LocationEvent event) {

busy = true;

if (event.top) location.setText(event.location);

}

public void changing(LocationEvent event) {

}

});

browser.addProgressListener(new ProgressListener() {

public void changed(ProgressEvent event) {

if (event.total == 0) return;

int ratio = event.current * 100 / event.total;

progressBar.setSelection(ratio);

busy = event.current != event.total;

if (!busy) {

index = 0;

canvas.redraw();

}

}

public void completed(ProgressEvent event) {

itemBack.setEnabled(browser.isBackEnabled());

itemForward.setEnabled(browser.isForwardEnabled());

progressBar.setSelection(0);

busy = false;

index = 0;

canvas.redraw();

}

});

browser.addStatusTextListener(new StatusTextListener() {

public void changed(StatusTextEvent event) {

status.setText(event.text);

}

});

if (parent instanceof Shell) {

final Shell shell = (Shell)parent;

browser.addTitleListener(new TitleListener() {

public void changed(TitleEvent event) {

shell.setText(event.title+" - "+getResourceString("window.title"));

}

});

}

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);

location.addListener(SWT.DefaultSelection, new Listener() {

public void handleEvent(Event e) {

browser.setUrl(location.getText());

}

});

initialize(display, browser);

browser.setUrl(getResourceString("Startup"));

}

}

static String getResourceString(String key) {

try {

return "key";

} catch (MissingResourceException e) {

return key;

} catch (NullPointerException e) {

return "!" + key + "!";

}

}

static String getResourceString(String key, Object[] args) {

try {

return MessageFormat.format(getResourceString(key), args);

} catch (MissingResourceException e) {

return key;

} catch (NullPointerException e) {

return "!" + key + "!";

}

}

static void initialize(final Display display, Browser browser) {

browser.addOpenWindowListener(new OpenWindowListener() {

public void open(WindowEvent event) {

System.out.println("Open");

Shell shell = new Shell(display);

shell.setLayout(new FillLayout());

Browser browser = new Browser(shell, SWT.NONE);

initialize(display, browser);

event.browser = browser;

}

});

browser.addVisibilityWindowListener(new VisibilityWindowListener() {

public void hide(WindowEvent event) {

}

public void show(WindowEvent event) {

System.out.println("Show");

Browser browser = (Browser)event.widget;

Shell shell = browser.getShell();

if (event.location != null) shell.setLocation(event.location);

if (event.size != null) {

Point size = event.size;

shell.setSize(shell.computeSize(size.x, size.y));

}

shell.open();

}

});

browser.addCloseWindowListener(new CloseWindowListener() {

public void close(WindowEvent event) {

System.out.println("Close");

Browser browser = (Browser)event.widget;

Shell shell = browser.getShell();

shell.close();

}

});

}

public void dispose() {

freeResources();

}

void freeResources() {

if (images != null) {

for (int i = 0; i < images.leng开发者_JS开发th; ++i) {

final Image image = images[i];

if (image != null) image.dispose();

}

images = null;

}

}

public void setFocus() {

location.setFocus();

}

public static void main(String [] args) {

Display display = new Display();

Shell shell = new Shell(display);

shell.setLayout(new FillLayout());

shell.setText("Browser example");

BrowserExample instance = new BrowserExample(shell);

Image icon = new Image(display, "C:/icons/web/go.gif");

shell.setImage(icon);

shell.open();

while (!shell.isDisposed()) {

if (!display.readAndDispatch())

display.sleep();

}

icon.dispose();

instance.dispose();

display.dispose();

}

}

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