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

		});

		// Check box to request mask display.
		maskCheck = new Button(group, SWT.CHECK);
		maskCheck.setText(bundle.getString("Mask"));
		maskCheck.setSelection(showMask);
		maskCheck.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent event) {
				showMask = ((Button) event.widget).getSelection();
				if (image != null) {
					imageCanvas.redraw();
				}
			}
		});

		// Check box to request background display.
		backgroundCheck = new Button(group, SWT.CHECK);
		backgroundCheck.setText(bundle.getString("Background"));
		backgroundCheck.setSelection(showBackground);
		backgroundCheck.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent event) {
				showBackground = ((Button) event.widget).getSelection();
			}
		});

		// Group the animation buttons.
		group = new Group(controls, SWT.NONE);
		group.setLayout(new RowLayout());
		group.setText(bundle.getString("Animation"));

		// Push button to display the previous image in a multi-image file.
		previousButton = new Button(group, SWT.PUSH);
		previousButton.setText(bundle.getString("Previous"));
		previousButton.setEnabled(false);
		previousButton.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent event) {
				previous();
			}
		});

		// Push button to display the next image in a multi-image file.
		nextButton = new Button(group, SWT.PUSH);
		nextButton.setText(bundle.getString("Next"));
		nextButton.setEnabled(false);
		nextButton.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent event) {
				next();
			}
		});

		// Push button to toggle animation of a multi-image file.
		animateButton = new Button(group, SWT.PUSH);
		animateButton.setText(bundle.getString("Animate"));
		animateButton.setEnabled(false);
		animateButton.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent event) {
				animate();
			}
		});

		// Label to show the image file type.
		typeLabel = new Label(shell, SWT.NONE);
		typeLabel.setText(bundle.getString("Type_initial"));
		typeLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL));

		// Canvas to show the image.
		imageCanvas = new Canvas(shell, SWT.V_SCROLL | SWT.H_SCROLL | SWT.NO_REDRAW_RESIZE | SWT.NO_BACKGROUND);
		imageCanvas.setBackground(whiteColor);
		imageCanvas.setCursor(crossCursor);
		gridData = new GridData();
		gridData.verticalSpan = 15;
		gridData.horizontalAlignment = GridData.FILL;
		gridData.verticalAlignment = GridData.FILL;
		gridData.grabExcessHorizontalSpace = true;
		gridData.grabExcessVerticalSpace = true;
		imageCanvas.setLayoutData(gridData);
		imageCanvas.addPaintListener(new PaintListener() {
			public void paintControl(PaintEvent event) {
				if (image == null) {
					Rectangle bounds = imageCanvas.getBounds();
					event.gc.fillRectangle(0, 0, bounds.width, bounds.height);
				} else {
					paintImage(event);
				}
			}
		});
		imageCanvas.addMouseMoveListener(new MouseMoveListener() {
			public void mouseMove(MouseEvent event) {
				if (image != null) {
					showColorAt(event.x, event.y);
				}
			}
		});

		// Set up the image canvas scroll bars.
		ScrollBar horizontal = imageCanvas.getHorizontalBar();
		horizontal.setVisible(true);
		horizontal.setMinimum(0);
		horizontal.setEnabled(false);
		horizontal.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent event) {
				scrollHorizontally((ScrollBar) event.widget);
			}
		});
		ScrollBar vertical = imageCanvas.getVerticalBar();
		vertical.setVisible(true);
		vertical.setMinimum(0);
		vertical.setEnabled(false);
		vertical.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent event) {
				scrollVertically((ScrollBar) event.widget);
			}
		});

		// Label to show the image size.
		sizeLabel = new Label(shell, SWT.NONE);
		sizeLabel.setText(bundle.getString("Size_initial"));
		sizeLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL));

		// Label to show the image depth.
		depthLabel = new Label(shell, SWT.NONE);
		depthLabel.setText(bundle.getString("Depth_initial"));
		depthLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL));

		// Label to show the transparent pixel.
		transparentPixelLabel = new Label(shell, SWT.NONE);
		transparentPixelLabel.setText(bundle.getString("Transparent_pixel_initial"));
		transparentPixelLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL));

		// Label to show the time to load.
		timeToLoadLabel = new Label(shell, SWT.NONE);
		timeToLoadLabel.setText(bundle.getString("Time_to_load_initial"));
		timeToLoadLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL));

		// Separate the animation fields from the rest of the fields.
		separator = new Label(shell, SWT.SEPARATOR | SWT.HORIZONTAL);
		separator.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL));

		// Label to show the logical screen size for animation.
		screenSizeLabel = new Label(shell, SWT.NONE);
		screenSizeLabel.setText(bundle.getString("Animation_size_initial"));
		screenSizeLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL));

		// Label to show the background pixel.
		backgroundPixelLabel = new Label(shell, SWT.NONE);
		backgroundPixelLabel.setText(bundle.getString("Background_pixel_initial"));
		backgroundPixelLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL));

		// Label to show the image location (x, y).
		locationLabel = new Label(shell, SWT.NONE);
		locationLabel.setText(bundle.getString("Image_location_initial"));
		locationLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL));

		// Label to show the image disposal method.
		disposalMethodLabel = new Label(shell, SWT.NONE);
		disposalMethodLabel.setText(bundle.getString("Disposal_initial"));
		disposalMethodLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL));

		// Label to show the image delay time.
		delayTimeLabel = new Label(shell, SWT.NONE);
		delayTimeLabel.setText(bundle.getString("Delay_initial"));
		delayTimeLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL));

		// Label to show the background pixel.
		repeatCountLabel = new Label(shell, SWT.NONE);
		repeatCountLabel.setText(bundle.getString("Repeats_initial"));
		repeatCountLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL));

		// Separate the animation fields from the palette.
		separator = new Label(shell, SWT.SEPARATOR | SWT.HORIZONTAL);
		separator.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL));

		// Label to show if the image has a direct or indexed palette.
		paletteLabel = new Label(shell, SWT.NONE);
		paletteLabel.setText(bundle.getString("Palette_initial"));
		paletteLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL));

		// Canvas to show the image's palette.
		paletteCanvas = new Canvas(shell, SWT.BORDER | SWT.V_SCROLL | SWT.NO_REDRAW_RESIZE);
		paletteCanvas.setFont(fixedWidthFont);
		paletteCanvas.getVerticalBar().setVisible(true);
		gridData = new GridData();
		gridData.horizontalAlignment = GridData.FILL;
		gridData.verticalAlignment = GridData.FILL;
		GC gc = new GC(paletteLabel);
		paletteWidth = gc.stringExtent(bundle.getString("Max_length_string")).x;
		gc.dispose();
		gridData.widthHint = paletteWidth;
		gridData.heightHint = 16 * 11; // show at least 16 colors
		paletteCanvas.setLayoutData(gridData);
		paletteCanvas.addPaintListener(new PaintListener() {
			public void paintControl(PaintEvent event) {
				if (image != null)
					paintPalette(event);
			}
		});

		// Set up the palette canvas scroll bar.
		vertical = paletteCanvas.getVerticalBar();
		vertical.setVisible(true);
		vertical.setMinimum(0);
		vertical.setIncrement(10);
		vertical.setEnabled(false);
		vertical.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent event) {
				scrollPalette((ScrollBar) event.widget);
			}
		});

		// Sash to see more of image or image data.
		sash = new Sash(shell, SWT.HORIZONTAL);
		gridData = new GridData();
		gridData.horizontalSpan = 2;
		gridData.horizontalAlignment = GridData.FILL;
		sash.setLayoutData(gridData);
		sash.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent event) {
				if (event.detail != SWT.DRAG) {
					((GridData) paletteCanvas.getLayoutData()).heightHint = SWT.DEFAULT;
					Rectangle paletteCanvasBounds = paletteCanvas.getBounds();
					int minY = paletteCanvasBounds.y + 20;
					Rectangle dataLabelBounds = dataLabel.getBounds();
					int maxY = statusLabel.getBounds().y - dataLabelBounds.height - 20;
					if (event.y > minY && event.y < maxY) {
						Rectangle oldSash = sash.getBounds();
						sash.setBounds(event.x, event.y, event.width, event.height);
						int diff = event.y - oldSash.y;
						Rectangle bounds = imageCanvas.getBounds();
						imageCanvas.setBounds(bounds.x, bounds.y, bounds.width, bounds.height + diff);
						bounds = paletteCanvasBounds;
						paletteCanvas.setBounds(bounds.x, bounds.y, bounds.width, bounds.height + diff);
						bounds = dataLabelBounds;
						dataLabel.setBounds(bounds.x, bounds.y + diff, bounds.width, bounds.height);
						bounds = dataText.getBounds();
						dataText.setBounds(bounds.x, bounds.y + diff, bounds.width, bounds.height - diff);
						// shell.layout(true);
					}
				}
			}
		});

		// Label to show data-specific fields.
		dataLabel = new Label(shell, SWT.NONE);
		dataLabel.setText(bundle.getString("Pixel_data_initial"));
		gridData = new GridData();
		gridData.horizontalSpan = 2;
		gridData.horizontalAlignment = GridData.FILL;
		dataLabel.setLayoutData(gridData);

		// Text to show a dump of the data.
		dataText = new StyledText(shell, SWT.BORDER | SWT.MULTI | SWT.READ_ONLY | SWT.V_SCROLL | SWT.H_SCROLL);
		dataText.setBackground(display.getSystemColor(SWT.COLOR_WIDGET_BACKGROUND));
		dataText.setFont(fixedWidthFont);
		gridData = new GridData();
		gridData.horizontalSpan = 2;
		gridData.horizontalAlignment = GridData.FILL;
		gridData.verticalAlignment = GridData.FILL;
		gridData.heightHint = 128;
		gridData.grabExcessVerticalSpace = true;
		dataText.setLayoutData(gridData);
		dataText.addMouseListener(new MouseAdapter() {
			public void mouseDown(MouseEvent event) {
				if (image != null && event.button == 1) {
					showColorForData();
				}
			}
		});
		dataText.addKeyListener(new KeyAdapter() {
			public void keyPressed(KeyEvent event) {
				if (image != null) {
					showColorForData();
				}
			}
		});

		// Label to show status and cursor location in image.
		statusLabel = new Label(shell, SWT.NONE);
		statusLabel.setText("");
		gridData = new GridData();
		gridData.horizontalSpan = 2;
		gridData.horizontalAlignment = GridData.FILL;
		statusLabel.setLayoutData(gridData);
	}

	Menu createMenuBar() {
		// Menu bar.
		Menu menuBar = new Menu(shell, SWT.BAR);
		shell.setMenuBar(menuBar);
		createFileMenu(menuBar);
		createAlphaMenu(menuBar);
		return menuBar;
	}

	void createFileMenu(Menu menuBar) {
		// File menu
		MenuItem item = new MenuItem(menuBar, SWT.CASCADE);
		item.setText(bundle.getString("File"));
		Menu fileMenu = new Menu(shell, SWT.DROP_DOWN);
		item.setMenu(fileMenu);

		// File -> Open File...
		item = new MenuItem(fileMenu, SWT.PUSH);
		item.setText(bundle.getString("OpenFile"));
		item.setAccelerator(SWT.MOD1 + 'O');
		item.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent event) {
				menuOpenFile();
			}
		});

		// File -> Open URL...
		item = new MenuItem(fileMenu, SWT.PUSH);
		item.setText(bundle.getString("OpenURL"));
		item.setAccelerator(SWT.MOD1 + 'U');
		item.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent event) {
				menuOpenURL();
			}
		});

		// File -> Reopen
		item = new MenuItem(fileMenu, SWT.PUSH);
		item.setText(bundle.getString("Reopen"));
		item.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent event) {
				menuReopen();
			}
		});

		new MenuItem(fileMenu, SWT.SEPARATOR);

		// File -> Load File... (natively)
		item = new MenuItem(fileMenu, SWT.PUSH);
		item.setText(bundle.getString("LoadFile"));
		item.setAccelerator(SWT.MOD1 + 'L');
		item.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent event) {
				menuLoad();
			}
		});

		new MenuItem(fileMenu, SWT.SEPARATOR);

		// File -> Save
		item = new MenuItem(fileMenu, SWT.PUSH);
		item.setText(bundle.getString("Save"));
		item.setAccelerator(SWT.MOD1 + 'S');
		item.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent event) {
				menuSave();
			}
		});

		// File -> Save As...
		item = new MenuItem(fileMenu, SWT.PUSH);
		item.setText(bundle.getString("Save_as"));
		item.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent event) {
				menuSaveAs();
			}
		});

		// File -> Save Mask As...
		item = new MenuItem(fileMenu, SWT.PUSH);
		item.setText(bundle.getString("Save_mask_as"));
		item.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent event) {
				menuSaveMaskAs();
			}
		});

		new MenuItem(fileMenu, SWT.SEPARATOR);

		// File -> Print
		item = new MenuItem(fileMenu, SWT.PUSH);