Mercurial > projects > dwt-mac
view dwt/custom/AnimatedProgress.d @ 13:f565d3a95c0a
Ported dwt.internal
author | Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com> |
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date | Fri, 22 Aug 2008 16:46:34 +0200 |
parents | 380af2bdd8e5 |
children | 6337764516f1 |
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/******************************************************************************* * 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 * * Port to the D programming language: * Jacob Carlborg <jacob.carlborg@gmail.com> *******************************************************************************/ module dwt.custom.AnimatedProgress; import dwt.DWT; import dwt.events.ControlAdapter; import dwt.events.ControlEvent; import dwt.events.DisposeEvent; import dwt.events.DisposeListener; import dwt.events.PaintEvent; import dwt.events.PaintListener; import dwt.graphics.Color; import dwt.graphics.GC; import dwt.graphics.Point; import dwt.widgets.Canvas; import dwt.widgets.Composite; /** * A control for showing progress feedback for a long running operation. * * @deprecated As of Eclipse 2.1, use ProgressBar with the style DWT.INDETERMINATE * * <dl> * <dt><b>Styles:</b><dd>VERTICAL, HORIZONTAL, BORDER * </dl> */ public class AnimatedProgress : Canvas { static const int SLEEP = 70; static const int DEFAULT_WIDTH = 160; static const int DEFAULT_HEIGHT = 18; bool active = false; bool showStripes = false; int value; int orientation = DWT.HORIZONTAL; bool 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>DWT</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>DWT</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 DWTException <ul> * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li> * </ul> * * @see DWT#VERTICAL * @see DWT#HORIZONTAL * @see DWT#BORDER * @see #getStyle() */ public this (Composite parent, int style) { super(parent, checkStyle(style)); if ((style & DWT.VERTICAL) !is 0) { orientation = DWT.VERTICAL; } showBorder = (style & DWT.BORDER) !is 0; addControlListener(new class ControlAdapter { public void controlResized (ControlEvent e) { redraw(); } }); addPaintListener(new class PaintListener { public void paintControl (PaintEvent e) { paint(e); } }); addDisposeListener(new class DisposeListener { public void widgetDisposed (DisposeEvent e) { stop(); } }); } private static int checkStyle (int style) { int mask = DWT.NONE; return style & mask; } /** * Stop the animation if it is not already stopped and * reset the presentation to a blank appearance. * * @exception DWTException <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, bool changed) { checkWidget(); Point size = null; if (orientation is DWT.HORIZONTAL) { size = new Point(DEFAULT_WIDTH, DEFAULT_HEIGHT); } else { size = new Point(DEFAULT_HEIGHT, DEFAULT_WIDTH); } if (wHint !is DWT.DEFAULT) size.x = wHint; if (hHint !is DWT.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(DWT.COLOR_WIDGET_NORMAL_SHADOW), disp.getSystemColor(DWT.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(DWT.COLOR_LIST_SELECTION); gc.setBackground(color); gc.fillRectangle(rect); gc.setForeground(this.getBackground()); int step = 12; int foregroundValue = value is 0 ? step - 2 : value - 2; if (orientation is DWT.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 DWTException <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; const Display display = getDisplay(); const Runnable[] timer = new Runnable[1]; timer[0] = new class (display) Runnable { Display display; this (Display display) { this.display = display; } public void run () { if (!active) return; GC gc = new GC(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; } }