| /******************************************************************************* |
| * 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 |
| *******************************************************************************/ |
| package org.eclipse.swt.custom; |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.widgets.*; |
| import org.eclipse.swt.events.*; |
| |
| /** |
| * A control for showing progress feedback for a long running operation. |
| * |
| * @deprecated As of Eclipse 2.1, use ProgressBar with the style SWT.INDETERMINATE |
| * |
| * <dl> |
| * <dt><b>Styles:</b><dd>VERTICAL, HORIZONTAL, BORDER |
| * </dl> |
| */ |
| public class AnimatedProgress extends Canvas { |
| |
| static final int SLEEP = 70; |
| static final int DEFAULT_WIDTH = 160; |
| static final int DEFAULT_HEIGHT = 18; |
| boolean active = false; |
| boolean showStripes = false; |
| int value; |
| int orientation = SWT.HORIZONTAL; |
| boolean showBorder = false; |
| |
| /** |
| * Constructs a new instance of this class given its parent |
| * and a style value describing its behavior and appearance. |
| * <p> |
| * The style value is either one of the style constants defined in |
| * class <code>SWT</code> which is applicable to instances of this |
| * class, or must be built by <em>bitwise OR</em>'ing together |
| * (that is, using the <code>int</code> "|" operator) two or more |
| * of those <code>SWT</code> style constants. The class description |
| * lists the style constants that are applicable to the class. |
| * Style bits are also inherited from superclasses. |
| * </p> |
| * |
| * @param parent a widget which will be the parent of the new instance (cannot be null) |
| * @param style the style of widget to construct |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li> |
| * </ul> |
| * |
| * @see SWT#VERTICAL |
| * @see SWT#HORIZONTAL |
| * @see SWT#BORDER |
| * @see #getStyle() |
| */ |
| public AnimatedProgress(Composite parent, int style) { |
| super(parent, checkStyle(style)); |
| |
| if ((style & SWT.VERTICAL) != 0) { |
| orientation = SWT.VERTICAL; |
| } |
| showBorder = (style & SWT.BORDER) != 0; |
| |
| addControlListener(new ControlAdapter() { |
| public void controlResized(ControlEvent e) { |
| redraw(); |
| } |
| }); |
| addPaintListener(new PaintListener() { |
| public void paintControl(PaintEvent e) { |
| paint(e); |
| } |
| }); |
| addDisposeListener(new DisposeListener() { |
| public void widgetDisposed(DisposeEvent e){ |
| stop(); |
| } |
| }); |
| } |
| private static int checkStyle (int style) { |
| int mask = SWT.NONE; |
| return style & mask; |
| } |
| /** |
| * Stop the animation if it is not already stopped and |
| * reset the presentation to a blank appearance. |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public synchronized void clear(){ |
| checkWidget(); |
| if (active) stop(); |
| showStripes = false; |
| redraw(); |
| } |
| public Point computeSize(int wHint, int hHint, boolean changed) { |
| checkWidget(); |
| Point size = null; |
| if (orientation == SWT.HORIZONTAL) { |
| size = new Point(DEFAULT_WIDTH, DEFAULT_HEIGHT); |
| } else { |
| size = new Point(DEFAULT_HEIGHT, DEFAULT_WIDTH); |
| } |
| if (wHint != SWT.DEFAULT) size.x = wHint; |
| if (hHint != SWT.DEFAULT) size.y = hHint; |
| |
| return size; |
| } |
| private void drawBevelRect(GC gc, int x, int y, int w, int h, Color topleft, Color bottomright) { |
| gc.setForeground(topleft); |
| gc.drawLine(x, y, x+w-1, y); |
| gc.drawLine(x, y, x, y+h-1); |
| |
| gc.setForeground(bottomright); |
| gc.drawLine(x+w, y, x+w, y+h); |
| gc.drawLine(x, y+h, x+w, y+h); |
| } |
| void paint(PaintEvent event) { |
| GC gc = event.gc; |
| Display disp= getDisplay(); |
| |
| Rectangle rect= getClientArea(); |
| gc.fillRectangle(rect); |
| if (showBorder) { |
| drawBevelRect(gc, rect.x, rect.y, rect.width-1, rect.height-1, |
| disp.getSystemColor(SWT.COLOR_WIDGET_NORMAL_SHADOW), |
| disp.getSystemColor(SWT.COLOR_WIDGET_HIGHLIGHT_SHADOW)); |
| } |
| |
| paintStripes(gc); |
| } |
| void paintStripes(GC gc) { |
| |
| if (!showStripes) return; |
| |
| Rectangle rect= getClientArea(); |
| // Subtracted border painted by paint. |
| rect = new Rectangle(rect.x+2, rect.y+2, rect.width-4, rect.height-4); |
| |
| gc.setLineWidth(2); |
| gc.setClipping(rect); |
| Color color = getDisplay().getSystemColor(SWT.COLOR_LIST_SELECTION); |
| gc.setBackground(color); |
| gc.fillRectangle(rect); |
| gc.setForeground(this.getBackground()); |
| int step = 12; |
| int foregroundValue = value == 0 ? step - 2 : value - 2; |
| if (orientation == SWT.HORIZONTAL) { |
| int y = rect.y - 1; |
| int w = rect.width; |
| int h = rect.height + 2; |
| for (int i= 0; i < w; i+= step) { |
| int x = i + foregroundValue; |
| gc.drawLine(x, y, x, h); |
| } |
| } else { |
| int x = rect.x - 1; |
| int w = rect.width + 2; |
| int h = rect.height; |
| |
| for (int i= 0; i < h; i+= step) { |
| int y = i + foregroundValue; |
| gc.drawLine(x, y, w, y); |
| } |
| } |
| |
| if (active) { |
| value = (value + 2) % step; |
| } |
| } |
| /** |
| * Start the animation. |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public synchronized void start() { |
| checkWidget(); |
| if (active) return; |
| |
| active = true; |
| showStripes = true; |
| |
| final Display display = getDisplay(); |
| final Runnable [] timer = new Runnable [1]; |
| timer [0] = new Runnable () { |
| public void run () { |
| if (!active) return; |
| GC gc = new GC(AnimatedProgress.this); |
| paintStripes(gc); |
| gc.dispose(); |
| display.timerExec (SLEEP, timer [0]); |
| } |
| }; |
| display.timerExec (SLEEP, timer [0]); |
| } |
| /** |
| * Stop the animation. Freeze the presentation at its current appearance. |
| */ |
| public synchronized void stop() { |
| //checkWidget(); |
| active = false; |
| } |
| } |