Java/SWT JFace Eclipse/Cursor
Содержание
Cursor: create a color cursor from an image file
<source lang="java">
/*
* Cursor example snippet: create a color cursor from an image file * * For a list of all SWT example snippets see * http://dev.eclipse.org/viewcvs/index.cgi/%7Echeckout%7E/platform-swt-home/dev.html#snippets */
import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Cursor; import org.eclipse.swt.graphics.ImageData; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.FileDialog; import org.eclipse.swt.widgets.Listener; import org.eclipse.swt.widgets.Shell; public class Snippet118 {
public static void main(String[] args) { final Display display = new Display(); final Shell shell = new Shell(display); shell.setSize(150, 150); final Cursor[] cursor = new Cursor[1]; Button button = new Button(shell, SWT.PUSH); button.setText("Change cursor"); Point size = button.ruputeSize(SWT.DEFAULT, SWT.DEFAULT); button.setSize(size); button.addListener(SWT.Selection, new Listener() { public void handleEvent(Event e) { FileDialog dialog = new FileDialog(shell); dialog.setFilterExtensions(new String[] { "*.ico", "*.gif", "*.*" }); String name = dialog.open(); if (name == null) return; ImageData image = new ImageData(name); Cursor oldCursor = cursor[0]; cursor[0] = new Cursor(display, image, 0, 0); shell.setCursor(cursor[0]); if (oldCursor != null) oldCursor.dispose(); } }); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } if (cursor[0] != null) cursor[0].dispose(); display.dispose(); }
}
</source>
Cursor: create a color cursor from a source and a mask
<source lang="java">
/*
* Cursor example snippet: create a color cursor from a source and a mask * * For a list of all SWT example snippets see * http://dev.eclipse.org/viewcvs/index.cgi/%7Echeckout%7E/platform-swt-home/dev.html#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 Snippet119 {
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>
Cursor: create a cursor from a source and a mask
<source lang="java">
/*
* Cursor example snippet: create a cursor from a source and a mask * * For a list of all SWT example snippets see * http://dev.eclipse.org/viewcvs/index.cgi/%7Echeckout%7E/platform-swt-home/dev.html#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 Snippet92 { 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, 50, 10, 20, 20); gc.drawString("mask: ",10, 40); gc.drawImage(mask, 0, 0, 20, 20, 50, 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>
Cursor: set the hand cursor into a control
<source lang="java">
/*
* Cursor example snippet: set the hand cursor into a control * * For a list of all SWT example snippets see * http://dev.eclipse.org/viewcvs/index.cgi/%7Echeckout%7E/platform-swt-home/dev.html#snippets */
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.Event; import org.eclipse.swt.widgets.Listener; import org.eclipse.swt.widgets.Shell; public class Snippet44 {
public static void main(String[] args) { Display display = new Display(); final 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.addListener(SWT.Selection, new Listener() { public void handleEvent(Event e) { b.setCursor(cursor); } }); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } cursor.dispose(); display.dispose(); }
}
</source>
display busy cursor during long running task
<source lang="java">
/*
* BusyIndicator example snippet: display busy cursor during long running task * * For a list of all SWT example snippets see * http://dev.eclipse.org/viewcvs/index.cgi/%7Echeckout%7E/platform-swt-home/dev.html#snippets */
import org.eclipse.swt.SWT; import org.eclipse.swt.custom.BusyIndicator; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Text; public class Snippet130 {
public static void main(String[] args) { final Display display = new Display(); final Shell shell = new Shell(display); shell.setLayout(new GridLayout()); final Text text = new Text(shell, SWT.MULTI | SWT.BORDER | SWT.V_SCROLL); text.setLayoutData(new GridData(GridData.FILL_BOTH)); final int[] nextId = new int[1]; Button b = new Button(shell, SWT.PUSH); b.setText("invoke long running job"); b.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { Runnable longJob = new Runnable() { boolean done = false; int id; public void run() { Thread thread = new Thread(new Runnable() { public void run() { id = nextId[0]++; display.syncExec(new Runnable() { public void run() { if (text.isDisposed()) return; text .append("\nStart long running task " + id); } }); for (int i = 0; i < 100000; i++) { if (display.isDisposed()) return; System.out .println("do task that takes a long time in a separate thread " + id); } if (display.isDisposed()) return; display.syncExec(new Runnable() { public void run() { if (text.isDisposed()) return; text .append("\nCompleted long running task " + id); } }); done = true; display.wake(); } }); thread.start(); while (!done && !shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } } }; BusyIndicator.showWhile(display, longJob); } }); shell.setSize(250, 150); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } display.dispose(); }
}
</source>