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/*******************************************************************************
 * Copyright (c) 2000, 2017 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.custom;

import org.eclipse.swt.*;
import org.eclipse.swt.events.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.widgets.*;

/**
 * A control for showing progress feedback for a long running operation.
 *
 * @deprecated As of Eclipse 2.1, use ProgressBar with the style SWT.INDETERMINATE
 *
 * 
*
Styles:
VERTICAL, HORIZONTAL, BORDER *
* * @see Sample code and further information */ @Deprecated 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. *

* The style value is either one of the style constants defined in * class SWT which is applicable to instances of this * class, or must be built by bitwise OR'ing together * (that is, using the int "|" operator) two or more * of those SWT style constants. The class description * lists the style constants that are applicable to the class. * Style bits are also inherited from superclasses. *

* * @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
    *
  • ERROR_NULL_ARGUMENT - if the parent is null
  • *
* @exception SWTException
    *
  • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent
  • *
* * @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(ControlListener.controlResizedAdapter(e -> redraw())); addPaintListener(this::paint); addDisposeListener(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
    *
  • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
  • *
  • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
  • *
*/ public synchronized void clear(){ checkWidget(); if (active) stop(); showStripes = false; redraw(); } @Override 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
    *
  • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
  • *
  • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
  • *
*/ public synchronized void start() { checkWidget(); if (active) return; active = true; showStripes = true; final Display display = getDisplay(); final Runnable [] timer = new Runnable [1]; timer [0] = () -> { 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; } }




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