Java/SWT JFace Eclipse/Cursor
Содержание
Cursor: create a color cursor from an image file
/*
* 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();
}
}
Cursor: create a color cursor from a source and a mask
/*
* 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();
}
}
Cursor: create a cursor from a source and a mask
/*
* 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();
}
}
Cursor: set the hand cursor into a control
/*
* 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();
}
}
display busy cursor during long running task
/*
* 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();
}
}
