SWT 各种小示例集中

/******************************************************************************* * Copyright (c) 2000, 2007 IBM Corporation and others. * 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: * IBM Corporation - initial API and implementation *******************************************************************************/ package org.eclipse.swt.examples.imageanalyzer; import org.eclipse.swt.*; import org.eclipse.swt.widgets.*; import org.eclipse.swt.events.*; import org.eclipse.swt.layout.*; import org.eclipse.swt.graphics.*; import org.eclipse.swt.printing.*; import org.eclipse.swt.custom.*; import java.util.*; import java.net.*; import java.io.*; import java.text.MessageFormat; 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, paletteLabel, dataLabel, statusLabel; Combo backgroundCombo, 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; int paletteWidth = 140; // recalculated and used as a width hint int ix = 0, iy = 0, py = 0; // used to scroll the image and palette 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 Vector 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(new SelectionAdapter() { public void widgetSelected(SelectionEvent 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(new SelectionAdapter() { public void widgetSelected(SelectionEvent 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(new ControlAdapter() { public void controlResized(ControlEvent event) { resizeShell(event); } }); shell.addShellListener(new ShellAdapter() { public void shellClosed(ShellEvent 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(new DisposeListener() { public void widgetDisposed(DisposeEvent e) { // Clean up. if (image != null) image.dispose(); whiteColor.dispose(); blackColor.dispose(); redColor.dispose(); greenColor.dispose(); blueColor.dispose(); fixedWidthFont.dispose(); crossCursor.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 = new Cursor(display, 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(new DisposeListener() { public void widgetDisposed(DisposeEvent e) { imageCanvas