/** Creates the "Example" widgets. */
void createExampleWidgets() {
/* Compute the widget style */
int style = getDefaultStyle();
if (horizontalButton.getSelection()) style |= SWT.H_SCROLL;
if (verticalButton.getSelection()) style |= SWT.V_SCROLL;
if (borderButton.getSelection()) style |= SWT.BORDER;
if (noBackgroundButton.getSelection()) style |= SWT.NO_BACKGROUND;
if (noFocusButton.getSelection()) style |= SWT.NO_FOCUS;
if (noMergePaintsButton.getSelection()) style |= SWT.NO_MERGE_PAINTS;
if (noRedrawResizeButton.getSelection()) style |= SWT.NO_REDRAW_RESIZE;
/* Create the example widgets */
paintCount = 0;
cx = 0;
cy = 0;
canvas = new Canvas(canvasGroup, style);
canvas.addPaintListener(
new PaintListener() {
public void paintControl(PaintEvent e) {
paintCount++;
GC gc = e.gc;
if (fillDamageButton.getSelection()) {
Color color = e.display.getSystemColor(colors[paintCount % colors.length]);
gc.setBackground(color);
gc.fillRectangle(e.x, e.y, e.width, e.height);
}
Point size = canvas.getSize();
gc.drawArc(cx + 1, cy + 1, size.x - 2, size.y - 2, 0, 360);
gc.drawRectangle(cx + (size.x - 10) / 2, cy + (size.y - 10) / 2, 10, 10);
}
});
canvas.addControlListener(
new ControlAdapter() {
public void controlResized(ControlEvent event) {
Point size = canvas.getSize();
maxX = size.x * 3 / 2;
maxY = size.y * 3 / 2;
resizeScrollBars();
}
});
ScrollBar bar = canvas.getHorizontalBar();
if (bar != null) {
bar.addSelectionListener(
new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
scrollHorizontal((ScrollBar) event.widget);
}
});
}
bar = canvas.getVerticalBar();
if (bar != null) {
bar.addSelectionListener(
new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
scrollVertical((ScrollBar) event.widget);
}
});
}
}
public static void main(String[] args) {
final ImageFileNameProvider filenameProvider =
new ImageFileNameProvider() {
@Override
public String getImagePath(int zoom) {
switch (zoom) {
case 150:
return IMAGE_PATH_150;
case 200:
return IMAGE_PATH_200;
default:
return IMAGE_PATH_100;
}
}
};
final ImageDataProvider imageDataProvider =
new ImageDataProvider() {
@Override
public ImageData getImageData(int zoom) {
switch (zoom) {
case 150:
return new ImageData(IMAGE_PATH_150);
case 200:
return new ImageData(IMAGE_PATH_200);
default:
return new ImageData(IMAGE_PATH_100);
}
}
};
final Display display = new Display();
final Shell shell = new Shell(display);
shell.setLayout(new GridLayout(2, false));
new Label(shell, SWT.NONE).setText(IMAGE_200 + ":");
new Label(shell, SWT.NONE).setImage(new Image(display, IMAGE_PATH_200));
new Label(shell, SWT.NONE).setText(IMAGE_150 + ":");
new Label(shell, SWT.NONE).setImage(new Image(display, IMAGE_PATH_150));
new Label(shell, SWT.NONE).setText(IMAGE_100 + ":");
new Label(shell, SWT.NONE).setImage(new Image(display, IMAGE_PATH_100));
new Label(shell, SWT.SEPARATOR | SWT.HORIZONTAL)
.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false, 2, 1));
new Label(shell, SWT.NONE).setText("ImageFileNameProvider:");
new Label(shell, SWT.NONE).setImage(new Image(display, filenameProvider));
new Label(shell, SWT.NONE).setText("ImageDataProvider:");
new Label(shell, SWT.NONE).setImage(new Image(display, imageDataProvider));
new Label(shell, SWT.SEPARATOR | SWT.HORIZONTAL)
.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false, 2, 1));
new Label(shell, SWT.NONE).setText("Canvas\n(PaintListener)");
final Point size = new Point(550, 35);
final Canvas canvas = new Canvas(shell, SWT.NONE);
canvas.addPaintListener(
new PaintListener() {
@Override
public void paintControl(PaintEvent e) {
Point size = canvas.getSize();
paintImage(e.gc, size);
}
});
canvas.setLayoutData(new GridData(size.x, size.y));
new Label(shell, SWT.SEPARATOR | SWT.HORIZONTAL)
.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false, 2, 1));
new Label(shell, SWT.NONE).setText("Painted image\n (default resolution)");
Image image = new Image(display, size.x, size.y);
GC gc = new GC(image);
try {
paintImage(gc, size);
} finally {
gc.dispose();
}
new Label(shell, SWT.NONE).setImage(image);
new Label(shell, SWT.SEPARATOR | SWT.HORIZONTAL)
.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false, 2, 1));
new Label(shell, SWT.NONE).setText("Painted image\n(multi-res, unzoomed paint)");
new Label(shell, SWT.NONE)
.setImage(
new Image(
display,
new ImageDataProvider() {
@Override
public ImageData getImageData(int zoom) {
Image temp = new Image(display, size.x * zoom / 100, size.y * zoom / 100);
GC gc = new GC(temp);
try {
paintImage(gc, size);
return temp.getImageData();
} finally {
gc.dispose();
temp.dispose();
}
}
}));
new Label(shell, SWT.SEPARATOR | SWT.HORIZONTAL)
.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false, 2, 1));
new Label(shell, SWT.NONE).setText("Painted image\n(multi-res, zoomed paint)");
new Label(shell, SWT.NONE)
.setImage(
new Image(
display,
new ImageDataProvider() {
@Override
public ImageData getImageData(int zoom) {
Image temp = new Image(display, size.x * zoom / 100, size.y * zoom / 100);
GC gc = new GC(temp);
try {
paintImage2(
gc, new Point(size.x * zoom / 100, size.y * zoom / 100), zoom / 100);
return temp.getImageData();
} finally {
gc.dispose();
temp.dispose();
}
}
}));
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) display.sleep();
}
display.dispose();
}
