Mercurial > projects > dwt-addons
view dwtx/jface/dialogs/ProgressIndicator.d @ 17:f459f9147650
ImageAndMessgeDialog
author | Frank Benoit <benoit@tionex.de> |
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date | Tue, 01 Apr 2008 08:24:51 +0200 |
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children | 46a6e0e6ccd4 |
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/******************************************************************************* * Copyright (c) 2000, 2006 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: * Frank Benoit <benoit@tionex.de> *******************************************************************************/ module dwtx.jface.dialogs.ProgressIndicator; import dwtx.jface.dialogs.IDialogConstants; import dwt.DWT; import dwt.custom.StackLayout; import dwt.widgets.Composite; import dwt.widgets.ProgressBar; import dwt.dwthelper.utils; /** * A control for showing progress feedback for a long running operation. This * control supports both determinate and indeterminate DWT progress bars. For * indeterminate progress, we don't have to know the total amount of work in * advance and no <code>worked</code> method needs to be called. */ public class ProgressIndicator : Composite { private const static int PROGRESS_MAX = 1000; // value to use for max in // progress bar private bool animated = true; private StackLayout layout_; private ProgressBar determinateProgressBar; private ProgressBar indeterminateProgressBar; private double totalWork; private double sumWorked; /** * Create a ProgressIndicator as a child under the given parent. * * @param parent * The widgets parent */ public this(Composite parent) { super(parent, DWT.NULL); determinateProgressBar = new ProgressBar(this, DWT.HORIZONTAL); indeterminateProgressBar = new ProgressBar(this, DWT.HORIZONTAL | DWT.INDETERMINATE); layout_ = new StackLayout(); setLayout(layout_); } /** * Initialize the progress bar to be animated. */ public void beginAnimatedTask() { done(); layout_.topControl = indeterminateProgressBar; layout(); animated = true; } /** * Initialize the progress bar. * * @param max * The maximum value. */ public void beginTask(int max) { done(); this.totalWork = max; this.sumWorked = 0; determinateProgressBar.setMinimum(0); determinateProgressBar.setMaximum(PROGRESS_MAX); determinateProgressBar.setSelection(0); layout_.topControl = determinateProgressBar; layout(); animated = false; } /** * Progress is done. */ public void done() { if (!animated) { determinateProgressBar.setMinimum(0); determinateProgressBar.setMaximum(0); determinateProgressBar.setSelection(0); } layout_.topControl = null; layout(); } /** * Moves the progress indicator to the end. */ public void sendRemainingWork() { worked(totalWork - sumWorked); } /** * Moves the progress indicator by the given amount of work units * @param work the amount of work to increment by. */ public void worked(double work) { if (work is 0 || animated) { return; } sumWorked += work; if (sumWorked > totalWork) { sumWorked = totalWork; } if (sumWorked < 0) { sumWorked = 0; } int value = cast(int) (sumWorked / totalWork * PROGRESS_MAX); if (determinateProgressBar.getSelection() < value) { determinateProgressBar.setSelection(value); } } }