| package org.eclipse.swt.widgets; |
| |
| /* |
| * Copyright (c) 2000, 2002 IBM Corp. All rights reserved. |
| * This file is made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| */ |
| |
| import org.eclipse.swt.graphics.Point; |
| import org.eclipse.swt.internal.carbon.OS; |
| |
| import org.eclipse.swt.*; |
| |
| /** |
| * Instances of the receiver represent is an unselectable |
| * user interface object that is used to display progress, |
| * typically in the form of a bar. |
| * <dl> |
| * <dt><b>Styles:</b></dt> |
| * <dd>SMOOTH, HORIZONTAL, VERTICAL, INDETERMINATE</dd> |
| * <dt><b>Events:</b></dt> |
| * <dd>(none)</dd> |
| * </dl> |
| * <p> |
| * Note: Only one of the styles HORIZONTAL and VERTICAL may be specified. |
| * </p><p> |
| * IMPORTANT: This class is intended to be subclassed <em>only</em> |
| * within the SWT implementation. |
| * </p> |
| */ |
| public class ProgressBar extends Control { |
| |
| /** |
| * 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 composite control which will be the parent of the new instance (cannot be null) |
| * @param style the style of control 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> |
| * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li> |
| * </ul> |
| * |
| * @see SWT#SMOOTH |
| * @see SWT#HORIZONTAL |
| * @see SWT#VERTICAL |
| * @see Widget#checkSubclass |
| * @see Widget#getStyle |
| */ |
| public ProgressBar (Composite parent, int style) { |
| super (parent, checkStyle (style)); |
| } |
| |
| static int checkStyle (int style) { |
| return checkBits (style, SWT.HORIZONTAL, SWT.VERTICAL, 0, 0, 0, 0); |
| } |
| |
| public Point computeSize (int wHint, int hHint, boolean changed) { |
| checkWidget(); |
| int [] outMetric = new int [1]; |
| OS.GetThemeMetric (OS.kThemeMetricNormalProgressBarThickness, outMetric); |
| int width = 0, height = 0; |
| if ((style & SWT.HORIZONTAL) != 0) { |
| height = outMetric [0]; |
| width = height * 10; |
| } else { |
| width = outMetric [0]; |
| height = width * 10; |
| } |
| if (wHint != SWT.DEFAULT) width = wHint; |
| if (hHint != SWT.DEFAULT) height = hHint; |
| return new Point (width, height); |
| } |
| |
| void createHandle () { |
| int [] outControl = new int [1]; |
| int window = OS.GetControlOwner (parent.handle); |
| OS.CreateProgressBarControl (window, null, 0, 0, 100, (style & SWT.INDETERMINATE) != 0, outControl); |
| if (outControl [0] == 0) error (SWT.ERROR_NO_HANDLES); |
| handle = outControl [0]; |
| } |
| |
| /** |
| * Returns the maximum value which the receiver will allow. |
| * |
| * @return the maximum |
| * |
| * @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 int getMaximum () { |
| checkWidget(); |
| return OS.GetControl32BitMaximum (handle); |
| } |
| |
| /** |
| * Returns the minimum value which the receiver will allow. |
| * |
| * @return the minimum |
| * |
| * @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 int getMinimum () { |
| checkWidget(); |
| return OS.GetControl32BitMinimum (handle); |
| } |
| |
| /** |
| * Returns the single <em>selection</em> that is the receiver's position. |
| * |
| * @return the selection |
| * |
| * @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 int getSelection () { |
| checkWidget(); |
| return OS.GetControl32BitValue (handle); |
| } |
| |
| /** |
| * Sets the maximum value which the receiver will allow |
| * to be the argument which must be greater than or |
| * equal to zero. |
| * |
| * @param value the new maximum (must be zero or greater) |
| * |
| * @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 void setMaximum (int value) { |
| checkWidget(); |
| if (value < 0) return; |
| OS.SetControl32BitMaximum (handle, value); |
| } |
| |
| /** |
| * Sets the minimum value which the receiver will allow |
| * to be the argument which must be greater than or |
| * equal to zero. |
| * |
| * @param value the new minimum (must be zero or greater) |
| * |
| * @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 void setMinimum (int value) { |
| checkWidget(); |
| if (value < 0) return; |
| OS.SetControl32BitMinimum (handle, value); |
| } |
| |
| /** |
| * Sets the single <em>selection</em> that is the receiver's |
| * position to the argument which must be greater than or equal |
| * to zero. |
| * |
| * @param value the new selection (must be zero or greater) |
| * |
| * @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 void setSelection (int value) { |
| checkWidget(); |
| OS.SetControl32BitValue (handle, value); |
| } |
| |
| } |