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>