/******************************************************************************* * 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 Common Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/cpl-v10.html *  * Contributors: *     IBM Corporation - initial API and implementation *******************************************************************************/package org.eclipse.swt.widgets;import org.eclipse.swt.internal.win32.*;import org.eclipse.swt.*;import org.eclipse.swt.graphics.*;/** * 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 {	static final int DELAY = 100;	static final int TIMER_ID = 100;	static final int ProgressBarProc;	static final TCHAR ProgressBarClass = new TCHAR (0, OS.PROGRESS_CLASS, true);	static {		WNDCLASS lpWndClass = new WNDCLASS ();		OS.GetClassInfo (0, ProgressBarClass, lpWndClass);		ProgressBarProc = lpWndClass.lpfnWndProc;		/*		* Feature in Windows.  The progress bar window class		* does not include CS_DBLCLKS.  This mean that these		* controls will not get double click messages such as		* WM_LBUTTONDBLCLK.  The fix is to register a new 		* window class with CS_DBLCLKS.		* 		* NOTE:  Screen readers look for the exact class name		* of the control in order to provide the correct kind		* of assistance.  Therefore, it is critical that the		* new window class have the same name.  It is possible		* to register a local window class with the same name		* as a global class.  Since bits that affect the class		* are being changed, it is possible that other native		* code, other than SWT, could create a control with		* this class name, and fail unexpectedly.		*/		int hInstance = OS.GetModuleHandle (null);		int hHeap = OS.GetProcessHeap ();		lpWndClass.hInstance = hInstance;		lpWndClass.style &= ~OS.CS_GLOBALCLASS;		lpWndClass.style |= OS.CS_DBLCLKS;		int byteCount = ProgressBarClass.length () * TCHAR.sizeof;		int lpszClassName = OS.HeapAlloc (hHeap, OS.HEAP_ZERO_MEMORY, byteCount);		OS.MoveMemory (lpszClassName, ProgressBarClass, byteCount);		lpWndClass.lpszClassName = lpszClassName;		OS.RegisterClass (lpWndClass);//		OS.HeapFree (hHeap, 0, lpszClassName);		}/** * 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));}int callWindowProc (int msg, int wParam, int lParam) {	if (handle == 0) return 0;	return OS.CallWindowProc (ProgressBarProc, handle, msg, wParam, lParam);}static int checkStyle (int style) {	style |= SWT.NO_FOCUS;	return checkBits (style, SWT.HORIZONTAL, SWT.VERTICAL, 0, 0, 0, 0);}public Point computeSize (int wHint, int hHint, boolean changed) {	checkWidget ();	int border = getBorderWidth ();	int width = border * 2, height = border * 2;	if ((style & SWT.HORIZONTAL) != 0) {		width += OS.GetSystemMetrics (OS.SM_CXHSCROLL) * 10;		height += OS.GetSystemMetrics (OS.SM_CYHSCROLL);	} else {		width += OS.GetSystemMetrics (OS.SM_CXVSCROLL);		height += OS.GetSystemMetrics (OS.SM_CYVSCROLL) * 10;	}	if (wHint != SWT.DEFAULT) width = wHint + (border * 2);	if (hHint != SWT.DEFAULT) height = hHint + (border * 2);	return new Point (width, height);}void createHandle () {	super.createHandle ();	if ((style & SWT.INDETERMINATE) != 0) {		OS.SetTimer (handle, TIMER_ID, DELAY, 0);	}}int defaultForeground () {	return OS.GetSysColor (OS.COLOR_HIGHLIGHT);}/** * 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.SendMessage (handle, OS.PBM_GETRANGE, 0, 0);}/** * 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.SendMessage (handle, OS.PBM_GETRANGE, 1, 0);}/** * 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.SendMessage (handle, OS.PBM_GETPOS, 0, 0);}void releaseWidget () {	super.releaseWidget ();	if ((style & SWT.INDETERMINATE) != 0) {		OS.KillTimer (handle, TIMER_ID);	}}void setBackgroundPixel (int pixel) {	if (background == pixel) return;	background = pixel;	if (pixel == -1) pixel = OS.CLR_DEFAULT;	OS.SendMessage (handle, OS.PBM_SETBKCOLOR, 0, pixel);}void setForegroundPixel (int pixel) {	if (foreground == pixel) return;	foreground = pixel;	if (pixel == -1) pixel = OS.CLR_DEFAULT;	OS.SendMessage (handle, OS.PBM_SETBARCOLOR, 0, pixel);}/** * Sets the maximum value that the receiver will allow.  This new * value will be ignored if it is not greater than the receiver's current * minimum value.  If the new maximum is applied then the receiver's * selection value will be adjusted if necessary to fall within its new range. * * @param value the new maximum, which must be greater than the current 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 void setMaximum (int value) {	checkWidget ();	int minimum = OS.SendMessage (handle, OS.PBM_GETRANGE, 1, 0);	if (0 <= minimum && minimum < value) {		OS.SendMessage (handle, OS.PBM_SETRANGE32, minimum, value);	}}/** * Sets the minimum value that the receiver will allow.  This new * value will be ignored if it is negative or is not less than the receiver's * current maximum value.  If the new minimum is applied then the receiver's * selection value will be adjusted if necessary to fall within its new range. * * @param value the new minimum, which must be nonnegative and less than the current 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 void setMinimum (int value) {	checkWidget ();	int maximum = OS.SendMessage (handle, OS.PBM_GETRANGE, 0, 0);	if (0 <= value && value < maximum) {		OS.SendMessage (handle, OS.PBM_SETRANGE32, value, maximum);	}}/** * 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.SendMessage (handle, OS.PBM_SETPOS, value, 0);}int widgetStyle () {	int bits = super.widgetStyle ();	if ((style & SWT.SMOOTH) != 0) bits |= OS.PBS_SMOOTH;	if ((style & SWT.VERTICAL) != 0) bits |= OS.PBS_VERTICAL;	return bits;}TCHAR windowClass () {	return ProgressBarClass;}int windowProc () {	return ProgressBarProc;}LRESULT WM_GETDLGCODE (int wParam, int lParam) {	LRESULT result = super.WM_GETDLGCODE (wParam, lParam);	if (result != null) return result;	/*	* Feature in Windows.  The progress bar does	* not implement WM_GETDLGCODE.  As a result,	* a progress bar takes focus and takes part	* in tab traversal.  This behavior, while	* unspecified, is unwanted.  The fix is to	* implement WM_GETDLGCODE to behave like a	* STATIC control.	*/	return new LRESULT (OS.DLGC_STATIC);}LRESULT WM_TIMER (int wParam, int lParam) {	LRESULT result = super.WM_TIMER (wParam, lParam);	if (result != null) return result;	if (wParam == TIMER_ID) {		OS.SendMessage (handle, OS.PBM_STEPIT, 0, 0);	}	return null;}}