Mercurial > projects > dwt-win
view dwt/widgets/ColorDialog.d @ 43:9c2b9c930ceb
ColorDialog
author | Frank Benoit <benoit@tionex.de> |
---|---|
date | Fri, 01 Feb 2008 22:31:06 +0100 |
parents | 92c102dd64a3 |
children | c913756e6950 |
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/******************************************************************************* * Copyright (c) 2000, 2007 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 dwt.widgets.ColorDialog; import dwt.DWT; import dwt.DWTException; import dwt.graphics.PaletteData; import dwt.graphics.RGB; import dwt.internal.win32.OS; import dwt.widgets.Dialog; import dwt.widgets.Shell; import dwt.widgets.Display; /** * Instances of this class allow the user to select a color * from a predefined set of available colors. * <dl> * <dt><b>Styles:</b></dt> * <dd>(none)</dd> * <dt><b>Events:</b></dt> * <dd>(none)</dd> * </dl> * <p> * IMPORTANT: This class is intended to be subclassed <em>only</em> * within the DWT implementation. * </p> */ public class ColorDialog : Dialog { Display display; int width, height; RGB rgb; /** * Constructs a new instance of this class given only its parent. * * @param parent a composite control which will be the parent of the new instance * * @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> * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li> * </ul> * * @see DWT * @see Widget#checkSubclass * @see Widget#getStyle */ public this (Shell parent) { this (parent, DWT.PRIMARY_MODAL); } /** * 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 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 DWTException <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 DWT * @see Widget#checkSubclass * @see Widget#getStyle */ public this (Shell parent, int style) { super (parent, style); checkSubclass (); } private static extern(Windows) int CCHookFunc (HWND hdlg, int uiMsg, int lParam, int lpData) { ColorDialog dlg = cast(ColorDialog)cast(void*)lpData; return dlg.CCHookProc( hdlg, uiMsg, lParam ); } int CCHookProc (HWND hdlg, int uiMsg, int lParam ) { switch (uiMsg) { case OS.WM_INITDIALOG: { RECT rect; OS.GetWindowRect (hdlg, &rect); width = rect.right - rect.left; height = rect.bottom - rect.top; if (title !is null && title.length !is 0) { /* Use the character encoding for the default locale */ OS.SetWindowText (hdlg, StrToTCHARz(title)); } break; } case OS.WM_DESTROY: { RECT rect; OS.GetWindowRect (hdlg, &rect); int newWidth = rect.right - rect.left; int newHeight = rect.bottom - rect.top; if (newWidth < width || newHeight < height) { //display.fullOpen = false; } else { if (newWidth > width || newHeight > height) { //display.fullOpen = true; } } break; } } return 0; } /** * Returns the currently selected color in the receiver. * * @return the RGB value for the selected color, may be null * * @see PaletteData#getRGBs */ public RGB getRGB () { return rgb; } /** * Makes the receiver visible and brings it to the front * of the display. * * @return the selected color, or null if the dialog was * cancelled, no color was selected, or an error * occurred * * @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 RGB open () { /* Get the owner HWND for the dialog */ auto hwndOwner = parent.handle; /* Create the CCHookProc */ //Callback callback = new Callback (this, "CCHookProc", 4); //$NON-NLS-1$ //int lpfnHook = callback.getAddress (); //if (lpfnHook is 0) DWT.error(DWT.ERROR_NO_MORE_CALLBACKS); /* Allocate the Custom Colors */ display = parent.display; if (display.lpCustColors is null) { auto hHeap = OS.GetProcessHeap (); display.lpCustColors = cast(uint*)OS.HeapAlloc (hHeap, OS.HEAP_ZERO_MEMORY, 16 * 4); } /* Open the dialog */ CHOOSECOLOR lpcc; lpcc.lCustData = cast(int)cast(void*)this; lpcc.lStructSize = CHOOSECOLOR.sizeof; lpcc.Flags = OS.CC_ANYCOLOR | OS.CC_ENABLEHOOK; //if (display.fullOpen) lpcc.Flags |= OS.CC_FULLOPEN; lpcc.lpfnHook = &CCHookFunc; lpcc.hwndOwner = hwndOwner; lpcc.lpCustColors = display.lpCustColors; if (rgb !is null) { lpcc.Flags |= OS.CC_RGBINIT; int red = rgb.red & 0xFF; int green = (rgb.green << 8) & 0xFF00; int blue = (rgb.blue << 16) & 0xFF0000; lpcc.rgbResult = red | green | blue; } /* Make the parent shell be temporary modal */ Shell oldModal = null; if ((style & (DWT.APPLICATION_MODAL | DWT.SYSTEM_MODAL)) !is 0) { oldModal = display.getModalDialogShell (); display.setModalDialogShell (parent); } /* Open the dialog */ bool success = cast(bool) OS.ChooseColor (&lpcc); /* Clear the temporary dialog modal parent */ if ((style & (DWT.APPLICATION_MODAL | DWT.SYSTEM_MODAL)) !is 0) { display.setModalDialogShell (oldModal); } if (success) { int red = lpcc.rgbResult & 0xFF; int green = (lpcc.rgbResult >> 8) & 0xFF; int blue = (lpcc.rgbResult >> 16) & 0xFF; rgb = new RGB (red, green, blue); } /* Free the CCHookProc */ //callback.dispose (); /* Free the Custom Colors */ /* * This code is intentionally commented. Currently, * there is exactly one set of custom colors per display. * The memory associated with these colors is released * when the display is disposed. */ // if (lpCustColors !is 0) OS.HeapFree (hHeap, 0, lpCustColors); /* * This code is intentionally commented. On some * platforms, the owner window is repainted right * away when a dialog window exits. This behavior * is currently unspecified. */ // if (hwndOwner !is 0) OS.UpdateWindow (hwndOwner); if (!success) return null; return rgb; } /** * Sets the receiver's selected color to be the argument. * * @param rgb the new RGB value for the selected color, may be * null to let the platform select a default when * open() is called * @see PaletteData#getRGBs */ public void setRGB (RGB rgb) { this.rgb = rgb; } }