Java Tutorial/SWT/SWT Cursor
Содержание
Create a color cursor from a source and a mask
<source lang="java">
/*******************************************************************************
* Copyright (c) 2000, 2004 IBM Corporation and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * IBM Corporation - initial API and implementation *******************************************************************************/
/*
* Cursor example snippet: create a color cursor from a source and a mask * * For a list of all SWT example snippets see * http://www.eclipse.org/swt/snippets/ * * @since 3.0 */
import org.eclipse.swt.SWT; import org.eclipse.swt.events.PaintEvent; import org.eclipse.swt.events.PaintListener; import org.eclipse.swt.graphics.Color; import org.eclipse.swt.graphics.Cursor; import org.eclipse.swt.graphics.GC; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.graphics.ImageData; import org.eclipse.swt.graphics.PaletteData; import org.eclipse.swt.graphics.RGB; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class CursorFromSourceMask {
static byte[] srcData = { (byte) 0x11, (byte) 0x11, (byte) 0x11, (byte) 0x00, (byte) 0x00,
(byte) 0x11, (byte) 0x11, (byte) 0x11, (byte) 0x11, (byte) 0x10, (byte) 0x00, (byte) 0x01,
(byte) 0x10, (byte) 0x00, (byte) 0x01, (byte) 0x11, (byte) 0x11, (byte) 0x00, (byte) 0x22,
(byte) 0x01, (byte) 0x10, (byte) 0x33, (byte) 0x00, (byte) 0x11, (byte) 0x10, (byte) 0x02,
(byte) 0x22, (byte) 0x01, (byte) 0x10, (byte) 0x33, (byte) 0x30, (byte) 0x01, (byte) 0x10,
(byte) 0x22, (byte) 0x22, (byte) 0x01, (byte) 0x10, (byte) 0x33, (byte) 0x33, (byte) 0x01,
(byte) 0x10, (byte) 0x22, (byte) 0x22, (byte) 0x01, (byte) 0x10, (byte) 0x33, (byte) 0x33,
(byte) 0x01, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00,
(byte) 0x00, (byte) 0x00, (byte) 0x01, (byte) 0x11, (byte) 0x11, (byte) 0x01, (byte) 0x10,
(byte) 0x11, (byte) 0x11, (byte) 0x10, (byte) 0x01, (byte) 0x11, (byte) 0x11, (byte) 0x01,
(byte) 0x10, (byte) 0x11, (byte) 0x11, (byte) 0x10, (byte) 0x00, (byte) 0x00, (byte) 0x00,
(byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x10, (byte) 0x44,
(byte) 0x44, (byte) 0x01, (byte) 0x10, (byte) 0x55, (byte) 0x55, (byte) 0x01, (byte) 0x10,
(byte) 0x44, (byte) 0x44, (byte) 0x01, (byte) 0x10, (byte) 0x55, (byte) 0x55, (byte) 0x01,
(byte) 0x10, (byte) 0x04, (byte) 0x44, (byte) 0x01, (byte) 0x10, (byte) 0x55, (byte) 0x50,
(byte) 0x01, (byte) 0x11, (byte) 0x00, (byte) 0x44, (byte) 0x01, (byte) 0x10, (byte) 0x55,
(byte) 0x00, (byte) 0x11, (byte) 0x11, (byte) 0x10, (byte) 0x00, (byte) 0x01, (byte) 0x10,
(byte) 0x00, (byte) 0x01, (byte) 0x11, (byte) 0x11, (byte) 0x11, (byte) 0x11, (byte) 0x00,
(byte) 0x00, (byte) 0x11, (byte) 0x11, (byte) 0x11, };
static byte[] mskData = { (byte) 0x03, (byte) 0xc0, (byte) 0x1f, (byte) 0xf8, (byte) 0x3f,
(byte) 0xfc, (byte) 0x7f, (byte) 0xfe, (byte) 0x7f, (byte) 0xfe, (byte) 0x7f, (byte) 0xfe,
(byte) 0xff, (byte) 0xff, (byte) 0xfe, (byte) 0x7f, (byte) 0xfe, (byte) 0x7f, (byte) 0xff,
(byte) 0xff, (byte) 0x7f, (byte) 0xfe, (byte) 0x7f, (byte) 0xfe, (byte) 0x7f, (byte) 0xfe,
(byte) 0x3f, (byte) 0xfc, (byte) 0x1f, (byte) 0xf8, (byte) 0x03, (byte) 0xc0 };
public static void main(String[] args) {
Display display = new Display();
Color white = display.getSystemColor(SWT.COLOR_WHITE);
Color black = display.getSystemColor(SWT.COLOR_BLACK);
Color yellow = display.getSystemColor(SWT.COLOR_YELLOW);
Color red = display.getSystemColor(SWT.COLOR_RED);
Color green = display.getSystemColor(SWT.COLOR_GREEN);
Color blue = display.getSystemColor(SWT.COLOR_BLUE);
// Create a source ImageData of depth 4
PaletteData palette = new PaletteData(new RGB[] { black.getRGB(), white.getRGB(),
yellow.getRGB(), red.getRGB(), blue.getRGB(), green.getRGB() });
ImageData sourceData = new ImageData(16, 16, 4, palette, 1, srcData);
// Create a mask ImageData of depth 1 (monochrome)
palette = new PaletteData(new RGB[] { black.getRGB(), white.getRGB(), });
ImageData maskData = new ImageData(16, 16, 1, palette, 1, mskData);
// Set mask
sourceData.maskData = maskData.data;
sourceData.maskPad = maskData.scanlinePad;
// Create cursor
Cursor cursor = new Cursor(display, sourceData, 10, 10);
// Remove mask to draw them separately just to show what they look like
sourceData.maskData = null;
sourceData.maskPad = -1;
Shell shell = new Shell(display);
final Image source = new Image(display, sourceData);
final Image mask = new Image(display, maskData);
shell.addPaintListener(new PaintListener() {
public void paintControl(PaintEvent e) {
GC gc = e.gc;
int x = 10, y = 10;
String stringSource = "source: ";
String stringMask = "mask: ";
gc.drawString(stringSource, x, y);
gc.drawString(stringMask, x, y + 30);
x += Math.max(gc.stringExtent(stringSource).x, gc.stringExtent(stringMask).x);
gc.drawImage(source, x, y);
gc.drawImage(mask, x, y + 30);
}
});
shell.setSize(150, 150);
shell.open();
shell.setCursor(cursor);
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
cursor.dispose();
source.dispose();
mask.dispose();
display.dispose();
}
}</source>
Create a cursor from a source and a mask
<source lang="java">
/*******************************************************************************
* Copyright (c) 2000, 2004 IBM Corporation and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * IBM Corporation - initial API and implementation *******************************************************************************/
/*
* Cursor example snippet: create a cursor from a source and a mask * * For a list of all SWT example snippets see * http://www.eclipse.org/swt/snippets/ */
import org.eclipse.swt.SWT; import org.eclipse.swt.events.PaintEvent; import org.eclipse.swt.events.PaintListener; import org.eclipse.swt.graphics.Color; import org.eclipse.swt.graphics.Cursor; import org.eclipse.swt.graphics.GC; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.graphics.ImageData; import org.eclipse.swt.graphics.PaletteData; import org.eclipse.swt.graphics.RGB; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class CursorFromMask {
public static void main(String[] args) {
Display display = new Display();
Color white = display.getSystemColor(SWT.COLOR_WHITE);
Color black = display.getSystemColor(SWT.COLOR_BLACK);
// Create a source ImageData of depth 1 (monochrome)
PaletteData palette = new PaletteData(new RGB[] { white.getRGB(), black.getRGB(), });
ImageData sourceData = new ImageData(20, 20, 1, palette);
for (int i = 0; i < 10; i++) {
for (int j = 0; j < 20; j++) {
sourceData.setPixel(i, j, 1);
}
}
// Create a mask ImageData of depth 1 (monochrome)
palette = new PaletteData(new RGB[] { white.getRGB(), black.getRGB(), });
ImageData maskData = new ImageData(20, 20, 1, palette);
for (int i = 0; i < 20; i++) {
for (int j = 0; j < 10; j++) {
maskData.setPixel(i, j, 1);
}
}
// Create cursor
Cursor cursor = new Cursor(display, sourceData, maskData, 10, 10);
Shell shell = new Shell(display);
final Image source = new Image(display, sourceData);
final Image mask = new Image(display, maskData);
// Draw source and mask just to show what they look like
shell.addPaintListener(new PaintListener() {
public void paintControl(PaintEvent e) {
GC gc = e.gc;
gc.drawString("source: ", 10, 10);
gc.drawImage(source, 0, 0, 20, 20, 60, 10, 20, 20);
gc.drawString("mask: ", 10, 40);
gc.drawImage(mask, 0, 0, 20, 20, 60, 40, 20, 20);
}
});
shell.setSize(150, 150);
shell.open();
shell.setCursor(cursor);
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
cursor.dispose();
source.dispose();
mask.dispose();
display.dispose();
}
}</source>
Create Cursor from an Image
<source lang="java">
import org.eclipse.swt.graphics.Cursor; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class CursorImageCreate {
public static void main(String[] args) {
final Display display = new Display();
final Shell shell = new Shell(display);
shell.setSize(150, 150);
Cursor cursor = new Cursor(display, new Image(display,"yourFile.gif").getImageData(), 0, 0);
shell.setCursor(cursor);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
cursor.dispose();
display.dispose();
}
}</source>
Set Cursor to Control
<source lang="java">
import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Cursor; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class CursorSetControl {
public static void main(String[] args) {
Display display = new Display();
Cursor cursor = new Cursor(display, SWT.CURSOR_HAND);
Shell shell = new Shell(display);
shell.open();
final Button b = new Button(shell, 0);
b.setBounds(10, 10, 200, 200);
b.setCursor(cursor);
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
cursor.dispose();
display.dispose();
}
}</source>
Use transparent image to hide Cursor
<source lang="java">
/*******************************************************************************
* Copyright (c) 2000, 2006 IBM Corporation and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * IBM Corporation - initial API and implementation *******************************************************************************/
/*
* Cursor snippet: Hide the Cursor over a control. * * For a list of all SWT example snippets see * http://www.eclipse.org/swt/snippets/ */
import org.eclipse.swt.SWT; import org.eclipse.swt.events.PaintEvent; import org.eclipse.swt.events.PaintListener; import org.eclipse.swt.graphics.Color; import org.eclipse.swt.graphics.Cursor; import org.eclipse.swt.graphics.ImageData; import org.eclipse.swt.graphics.PaletteData; import org.eclipse.swt.graphics.RGB; import org.eclipse.swt.widgets.Canvas; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class CursorHideControl {
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setBounds(10, 10, 200, 200);
Canvas canvas = new Canvas(shell, SWT.BORDER);
canvas.setBounds(10, 50, 150, 100);
canvas.addPaintListener(new PaintListener() {
public void paintControl(PaintEvent e) {
e.gc.drawString("hide Cursor here", 10, 10);
}
});
// create a cursor with a transparent image
Color white = display.getSystemColor(SWT.COLOR_WHITE);
Color black = display.getSystemColor(SWT.COLOR_BLACK);
PaletteData palette = new PaletteData(new RGB[] { white.getRGB(), black.getRGB() });
ImageData sourceData = new ImageData(16, 16, 1, palette);
sourceData.transparentPixel = 0;
Cursor cursor = new Cursor(display, sourceData, 0, 0);
shell.open();
canvas.setCursor(cursor);
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
cursor.dispose();
display.dispose();
}
}</source>
