paintexample.java

一个简单的UNCODE 码生成程序

		label.setText(getResourceString("settings.AirbrushRadius.text"));

		final Scale airbrushRadiusScale = new Scale(toolSettingsFrame, SWT.HORIZONTAL);
		airbrushRadiusScale.setMinimum(5);
		airbrushRadiusScale.setMaximum(50);
		airbrushRadiusScale.setSelection(toolSettings.airbrushRadius);
		airbrushRadiusScale.setLayoutData(new GridData(GridData.FILL_HORIZONTAL | GridData.VERTICAL_ALIGN_FILL));
		airbrushRadiusScale.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent e) {
				toolSettings.airbrushRadius = airbrushRadiusScale.getSelection();
				updateToolSettings();
			}
		});

		label = new Label(toolSettingsFrame, SWT.NONE);
		label.setText(getResourceString("settings.AirbrushIntensity.text"));

		final Scale airbrushIntensityScale = new Scale(toolSettingsFrame, SWT.HORIZONTAL);
		airbrushIntensityScale.setMinimum(1);
		airbrushIntensityScale.setMaximum(100);
		airbrushIntensityScale.setSelection(toolSettings.airbrushIntensity);
		airbrushIntensityScale.setLayoutData(new GridData(GridData.FILL_HORIZONTAL | GridData.VERTICAL_ALIGN_FILL));
		airbrushIntensityScale.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent e) {
				toolSettings.airbrushIntensity = airbrushIntensityScale.getSelection();
				updateToolSettings();
			}
		});
	}
		
	/**
	 * Disposes of all resources associated with a particular
	 * instance of the PaintExample.
	 */	
	public void dispose() {
		if (paintSurface != null) paintSurface.dispose();		
		if (paintColors != null) {
			for (int i = 0; i < paintColors.length; ++i) {
				final Color color = paintColors[i];
				if (color != null) color.dispose();
			}
		}
		paintDefaultFont = null;
		paintColors = null;
		paintSurface = null;
		freeResources();
	}

	/**
	 * Frees the resource bundle resources.
	 */
	public void freeResources() {
		for (int i = 0; i < tools.length; ++i) {
			Tool tool = tools[i];
			final Image image = tool.image;
			if (image != null) image.dispose();
			tool.image = null;
		}
	}
	
	/**
	 * Returns the Display.
	 * 
	 * @return the display we're using
	 */
	public Display getDisplay() {
		return mainComposite.getDisplay();
	}
	
	/**
	 * Gets a string from the resource bundle.
	 * We don't want to crash because of a missing String.
	 * Returns the key if not found.
	 */
	public static String getResourceString(String key) {
		try {
			return resourceBundle.getString(key);
		} catch (MissingResourceException e) {
			return key;
		} catch (NullPointerException e) {
			return "!" + key + "!";
		}			
	}

	/**
	 * Gets a string from the resource bundle and binds it
	 * with the given arguments. If the key is not found,
	 * return the key.
	 */
	public static String getResourceString(String key, Object[] args) {
		try {
			return MessageFormat.format(getResourceString(key), args);
		} catch (MissingResourceException e) {
			return key;
		} catch (NullPointerException e) {
			return "!" + key + "!";
		}
	}

	/**
	 * Initialize colors, fonts, and tool settings.
	 */
	private void init() {
		Display display = mainComposite.getDisplay();
		
		paintColorWhite = new Color(display, 255, 255, 255);
		paintColorBlack = new Color(display, 0, 0, 0);
		
		paintDefaultFont = display.getSystemFont();

		paintColors = new Color[numPaletteCols * numPaletteRows];
		paintColors[0] = paintColorBlack;
		paintColors[1] = paintColorWhite;
		for (int i = 2; i < paintColors.length; i++) {
			paintColors[i] = new Color(display,
				((i*7)%255),((i*23)%255), ((i*51)%255));
		}

		toolSettings = new ToolSettings();
		toolSettings.commonForegroundColor = paintColorBlack;
		toolSettings.commonBackgroundColor = paintColorWhite;
		toolSettings.commonFont = paintDefaultFont;
	}

	/**
	 * Sets the action field of the tools
	 */
	private void initActions() {
		for (int i = 0; i < tools.length; ++i) {
			final Tool tool = tools[i];
			String group = tool.group;
			if (group.equals("tool")) {
				tool.action = new Runnable() {
					public void run() {
						setPaintTool(tool.id);
					}
				};
			} else if (group.equals("fill")) {
				tool.action = new Runnable() {
					public void run() {
						setFillType(tool.id);
					}
				};
			} else if (group.equals("linestyle")) {
				tool.action = new Runnable() {
					public void run() {
						setLineStyle(tool.id);
					}
				};
			} else if (group.equals("options")) {
				tool.action = new Runnable() {
					public void run() {
						FontDialog fontDialog = new FontDialog(paintSurface.getShell(), SWT.PRIMARY_MODAL);
						FontData[] fontDatum = toolSettings.commonFont.getFontData();
						if (fontDatum != null && fontDatum.length > 0) {
							fontDialog.setFontList(fontDatum);
						}
						fontDialog.setText(getResourceString("options.Font.dialog.title"));

						paintSurface.hideRubberband();
						FontData fontData = fontDialog.open();
						paintSurface.showRubberband();
						if (fontData != null) {
							try {
								Font font = new Font(mainComposite.getDisplay(), fontData);
								toolSettings.commonFont = font;
								updateToolSettings();
							} catch (SWTException ex) {
							}
						}
					}
				};
			}
		}
	}

	/**
	 * Loads the image resources.
	 */
	public void initResources() {
		final Class clazz = PaintExample.class;
		if (resourceBundle != null) {
			try {
				for (int i = 0; i < tools.length; ++i) {
					Tool tool = tools[i];
					String id = tool.group + '.' + tool.name;
					InputStream sourceStream = clazz.getResourceAsStream(getResourceString(id + ".image"));
					ImageData source = new ImageData(sourceStream);
					ImageData mask = source.getTransparencyMask();
					tool.image = new Image(null, source, mask);
					try {
						sourceStream.close();
					} catch (IOException e) {
						e.printStackTrace();
					}
				}
				return;
			} catch (Throwable t) {
			}
		}
		String error = (resourceBundle != null) ?
			getResourceString("error.CouldNotLoadResources") :
			"Unable to load resources";
		freeResources();
		throw new RuntimeException(error);
	}

	/**
	 * Grabs input focus.
	 */
	public void setFocus() {
		mainComposite.setFocus();
	}
	
	/**
	 * Sets the tool foreground color.
	 * 
	 * @param color the new color to use
	 */
	public void setForegroundColor(Color color) {
		if (activeForegroundColorCanvas != null)
			activeForegroundColorCanvas.setBackground(color);
		toolSettings.commonForegroundColor = color;
		updateToolSettings();
	}

	/**
	 * Set the tool background color.
	 * 
	 * @param color the new color to use
	 */
	public void setBackgroundColor(Color color) {
		if (activeBackgroundColorCanvas != null)
			activeBackgroundColorCanvas.setBackground(color);
		toolSettings.commonBackgroundColor = color;
		updateToolSettings();
	}

	/**
	 * Selects a tool given its ID.
	 */
	public void setPaintTool(int id) {
		PaintTool paintTool = (PaintTool) tools[id].data;
		paintSurface.setPaintSession(paintTool);
		updateToolSettings();
	}
	
	/**
	 * Selects a filltype given its ID.
	 */
	public void setFillType(int id) {
		Integer fillType = (Integer) tools[id].data;
		toolSettings.commonFillType = fillType.intValue();
		updateToolSettings();		
	}

	/**
	 * Selects line type given its ID.
	 */
	public void setLineStyle(int id) {
		Integer lineType = (Integer) tools[id].data;
		toolSettings.commonLineStyle = lineType.intValue();
		updateToolSettings();		
	}

	/**
	 * Sets the size of the shell to it's "packed" size,
	 * unless that makes it bigger than the display,
	 * in which case set it to 9/10 of display size.
	 */
	private static void setShellSize (Display display, Shell shell) {
		Rectangle bounds = display.getBounds();
		Point size = shell.computeSize (SWT.DEFAULT, SWT.DEFAULT);
		if (size.x > bounds.width) size.x = bounds.width * 9 / 10;
		if (size.y > bounds.height) size.y = bounds.height * 9 / 10;
		shell.setSize (size);
	}

	/**
	 * Notifies the tool that its settings have changed.
	 */
	private void updateToolSettings() {
		final PaintTool activePaintTool = paintSurface.getPaintTool();
		if (activePaintTool == null) return;
		
		activePaintTool.endSession();
		activePaintTool.set(toolSettings);
		activePaintTool.beginSession();
	}
}