/** Loads the image resources. */
public void initResources() {
final Class clazz = PaintExample.class;
if (PaintExample.resourceBundle != null)
try {
for (int i = 0; i < PaintExample.tools.length; ++i) {
Tool tool = PaintExample.tools[i];
String id = tool.group + '.' + tool.name;
InputStream sourceStream =
clazz.getResourceAsStream(PaintExample.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 =
PaintExample.resourceBundle != null
? PaintExample.getResourceString("error.CouldNotLoadResources")
: "Unable to load resources";
freeResources();
throw new RuntimeException(error);
}
/**
* 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(PaintExample.getResourceString(key), args);
} catch (MissingResourceException e) {
return key;
} catch (NullPointerException e) {
return "!" + key + "!";
}
}
public static void main(java.lang.String[] args) {
org.eclipse.swt.widgets.Display display = new org.eclipse.swt.widgets.Display();
org.eclipse.swt.widgets.Shell shell = new org.eclipse.swt.widgets.Shell(display);
shell.setText(getResourceString("window.title"));
shell.setLayout(new org.eclipse.swt.layout.GridLayout());
org.eclipse.swt.examples.paint.PaintExample instance =
new org.eclipse.swt.examples.paint.PaintExample(shell);
instance.createToolBar(shell);
org.eclipse.swt.widgets.Composite composite =
new org.eclipse.swt.widgets.Composite(shell, SWT.NONE);
composite.setLayout(new org.eclipse.swt.layout.FillLayout());
composite.setLayoutData(new org.eclipse.swt.layout.GridData(SWT.FILL, SWT.FILL, true, true));
instance.createGUI(composite);
instance.setDefaults();
setShellSize(display, shell);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
instance.dispose();
}
/** Adds a tool item to the toolbar. Note: Only called by standalone. */
private ToolItem addToolItem(final ToolBar toolbar, final Tool tool) {
final String id = tool.group + '.' + tool.name;
ToolItem item = new ToolItem(toolbar, tool.type);
item.setText(PaintExample.getResourceString(id + ".label"));
item.setToolTipText(PaintExample.getResourceString(id + ".tooltip"));
item.setImage(tool.image);
item.addSelectionListener(
new SelectionAdapter() {
public void widgetSelected(SelectionEvent e) {
tool.action.run();
}
});
final int childID = toolbar.indexOf(item);
toolbar
.getAccessible()
.addAccessibleListener(
new AccessibleAdapter() {
public void getName(org.eclipse.swt.accessibility.AccessibleEvent e) {
if (e.childID == childID)
e.result = PaintExample.getResourceString(id + ".description");
}
});
return item;
}
/** Invokes as a standalone program. */
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setText(PaintExample.getResourceString("window.title"));
shell.setLayout(new GridLayout());
PaintExample instance = new PaintExample(shell);
instance.createToolBar(shell);
Composite composite = new Composite(shell, SWT.NONE);
composite.setLayout(new FillLayout());
composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
instance.createGUI(composite);
instance.setDefaults();
PaintExample.setShellSize(display, shell);
shell.open();
while (!shell.isDisposed()) if (!display.readAndDispatch()) display.sleep();
instance.dispose();
}
/**
* Returns name associated with this tool.
*
* @return the localized name of this tool
*/
@Override
public String getDisplayName() {
return PaintExample.getResourceString("tool.Rectangle.label");
}
/** Creates the GUI. */
public void createGUI(Composite parent) {
GridLayout gridLayout;
GridData gridData;
/** * Create principal GUI layout elements ** */
Composite displayArea = new Composite(parent, SWT.NONE);
gridLayout = new GridLayout();
gridLayout.numColumns = 1;
displayArea.setLayout(gridLayout);
// Creating these elements here avoids the need to instantiate the GUI elements
// in strict layout order. The natural layout ordering is an artifact of using
// SWT layouts, but unfortunately it is not the same order as that required to
// instantiate all of the non-GUI application elements to satisfy referential
// dependencies. It is possible to reorder the initialization to some extent, but
// this can be very tedious.
// paint canvas
final Canvas paintCanvas =
new Canvas(
displayArea,
SWT.BORDER | SWT.V_SCROLL | SWT.H_SCROLL | SWT.NO_REDRAW_RESIZE | SWT.NO_BACKGROUND);
gridData = new GridData(GridData.FILL_HORIZONTAL | GridData.FILL_VERTICAL);
paintCanvas.setLayoutData(gridData);
paintCanvas.setBackground(paintColorWhite);
// color selector frame
final Composite colorFrame = new Composite(displayArea, SWT.NONE);
gridData = new GridData(GridData.FILL_HORIZONTAL | GridData.VERTICAL_ALIGN_FILL);
colorFrame.setLayoutData(gridData);
// tool settings frame
final Composite toolSettingsFrame = new Composite(displayArea, SWT.NONE);
gridData = new GridData(GridData.FILL_HORIZONTAL | GridData.VERTICAL_ALIGN_FILL);
toolSettingsFrame.setLayoutData(gridData);
// status text
final Text statusText = new Text(displayArea, SWT.BORDER | SWT.SINGLE | SWT.READ_ONLY);
gridData = new GridData(GridData.FILL_HORIZONTAL | GridData.VERTICAL_ALIGN_FILL);
statusText.setLayoutData(gridData);
/** * Create the remaining application elements inside the principal GUI layout elements ** */
// paintSurface
paintSurface = new PaintSurface(paintCanvas, statusText, paintColorWhite);
// finish initializing the tool data
PaintExample.tools[PaintExample.Pencil_tool].data = new PencilTool(toolSettings, paintSurface);
PaintExample.tools[PaintExample.Airbrush_tool].data =
new AirbrushTool(toolSettings, paintSurface);
PaintExample.tools[PaintExample.Line_tool].data = new LineTool(toolSettings, paintSurface);
PaintExample.tools[PaintExample.PolyLine_tool].data =
new PolyLineTool(toolSettings, paintSurface);
PaintExample.tools[PaintExample.Rectangle_tool].data =
new RectangleTool(toolSettings, paintSurface);
PaintExample.tools[PaintExample.RoundedRectangle_tool].data =
new RoundedRectangleTool(toolSettings, paintSurface);
PaintExample.tools[PaintExample.Ellipse_tool].data =
new EllipseTool(toolSettings, paintSurface);
PaintExample.tools[PaintExample.Text_tool].data = new TextTool(toolSettings, paintSurface);
// colorFrame
gridLayout = new GridLayout();
gridLayout.numColumns = 3;
gridLayout.marginHeight = 0;
gridLayout.marginWidth = 0;
colorFrame.setLayout(gridLayout);
// activeForegroundColorCanvas, activeBackgroundColorCanvas
activeForegroundColorCanvas = new Canvas(colorFrame, SWT.BORDER);
gridData = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
gridData.heightHint = 24;
gridData.widthHint = 24;
activeForegroundColorCanvas.setLayoutData(gridData);
activeBackgroundColorCanvas = new Canvas(colorFrame, SWT.BORDER);
gridData = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
gridData.heightHint = 24;
gridData.widthHint = 24;
activeBackgroundColorCanvas.setLayoutData(gridData);
// paletteCanvas
final Canvas paletteCanvas = new Canvas(colorFrame, SWT.BORDER | SWT.NO_BACKGROUND);
gridData = new GridData(GridData.FILL_HORIZONTAL);
gridData.heightHint = 24;
paletteCanvas.setLayoutData(gridData);
paletteCanvas.addListener(
SWT.MouseDown,
new Listener() {
public void handleEvent(Event e) {
Rectangle bounds = paletteCanvas.getClientArea();
Color color = getColorAt(bounds, e.x, e.y);
if (e.button == 1) setForegroundColor(color);
else setBackgroundColor(color);
}
private Color getColorAt(Rectangle bounds, int x, int y) {
if (bounds.height <= 1 && bounds.width <= 1) return paintColorWhite;
final int row = (y - bounds.y) * PaintExample.numPaletteRows / bounds.height;
final int col = (x - bounds.x) * PaintExample.numPaletteCols / bounds.width;
return paintColors[
Math.min(
Math.max(row * PaintExample.numPaletteCols + col, 0), paintColors.length - 1)];
}
});
Listener refreshListener =
new Listener() {
public void handleEvent(Event e) {
if (e.gc == null) return;
Rectangle bounds = paletteCanvas.getClientArea();
for (int row = 0; row < PaintExample.numPaletteRows; ++row)
for (int col = 0; col < PaintExample.numPaletteCols; ++col) {
final int x = bounds.width * col / PaintExample.numPaletteCols;
final int y = bounds.height * row / PaintExample.numPaletteRows;
final int width =
Math.max(bounds.width * (col + 1) / PaintExample.numPaletteCols - x, 1);
final int height =
Math.max(bounds.height * (row + 1) / PaintExample.numPaletteRows - y, 1);
e.gc.setBackground(paintColors[row * PaintExample.numPaletteCols + col]);
e.gc.fillRectangle(bounds.x + x, bounds.y + y, width, height);
}
}
};
paletteCanvas.addListener(SWT.Resize, refreshListener);
paletteCanvas.addListener(SWT.Paint, refreshListener);
// paletteCanvas.redraw();
// toolSettingsFrame
gridLayout = new GridLayout();
gridLayout.numColumns = 4;
gridLayout.marginHeight = 0;
gridLayout.marginWidth = 0;
toolSettingsFrame.setLayout(gridLayout);
Label label = new Label(toolSettingsFrame, SWT.NONE);
label.setText(PaintExample.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(PaintExample.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();
}
});
}