imageanalyzer.java

SWTJFace篇项目源程序该项目包含 包含了Eclipse下构建swt的基本工程

package cn.com.chengang.jface.dialog.loopprogressdialog;

import java.io.InputStream;
import java.net.URL;
import java.text.MessageFormat;
import java.util.ResourceBundle;
import java.util.Vector;

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.ControlAdapter;
import org.eclipse.swt.events.ControlEvent;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.events.KeyAdapter;
import org.eclipse.swt.events.KeyEvent;
import org.eclipse.swt.events.MouseAdapter;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.events.MouseMoveListener;
import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.events.PaintListener;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.events.ShellAdapter;
import org.eclipse.swt.events.ShellEvent;
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.ImageLoaderListener;
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("cn/com/chengang/swt/dialog/loopprogressdialog/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", "*.gif", "*.ico", "*.jpg", "*.png", "*.tif" };
	static final String[] SAVE_FILTER_NAMES = new String[] { "BMP (*.bmp)", "GIF (*.gif)", "ICO (*.ico)", "JPEG (*.jpg)", "PNG (*.png)", "TIFF (*.tif)" };

	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) {
				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);

		// Separate the menu bar from the rest of the widgets.
		Label separator = new Label(shell, SWT.SEPARATOR | SWT.HORIZONTAL);
		GridData gridData = new GridData();
		gridData.horizontalSpan = 2;
		gridData.horizontalAlignment = GridData.FILL;
		separator.setLayoutData(gridData);

		// Add a composite to contain some control widgets across the top.
		Composite controls = new Composite(shell, SWT.NONE);
		RowLayout rowLayout = new RowLayout();
		rowLayout.marginTop = 0;
		rowLayout.marginBottom = 5;
		rowLayout.spacing = 8;
		controls.setLayout(rowLayout);
		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(new String[] { 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(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent event) {
				changeBackground();
			}
		});

		// 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 (int i = 0; i < values.length; i++) {
			scaleXCombo.add(values[i]);
		}
		scaleXCombo.select(scaleXCombo.indexOf("1"));
		scaleXCombo.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent 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 (int i = 0; i < values.length; i++) {
			scaleYCombo.add(values[i]);
		}
		scaleYCombo.select(scaleYCombo.indexOf("1"));
		scaleYCombo.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent 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(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent 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(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent 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(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent event) {
				transparent = ((Button) event.widget).getSelection();
				if (image != null) {
					imageCanvas.redraw();
				}
			}