| /******************************************************************************* |
| * Copyright (c) 2000, 2012 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.widgets; |
| |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.internal.*; |
| import org.eclipse.swt.internal.win32.*; |
| |
| /** |
| * 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 <em>not</em> intended to be subclassed. |
| * </p> |
| * |
| * @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: ControlExample, Dialog tab</a> |
| * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> |
| * @noextend This class is not intended to be subclassed by clients. |
| */ |
| public class ColorDialog extends Dialog { |
| static final int CUSTOM_COLOR_COUNT = 16; // from the MS spec for CHOOSECOLOR.lpCustColors |
| RGB rgb; |
| RGB [] rgbs; |
| int [] colors = new int [CUSTOM_COLOR_COUNT]; |
| |
| /** |
| * 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 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 |
| * @see Widget#checkSubclass |
| * @see Widget#getStyle |
| */ |
| public ColorDialog (Shell parent) { |
| this (parent, SWT.APPLICATION_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>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 |
| * @see Widget#checkSubclass |
| * @see Widget#getStyle |
| */ |
| public ColorDialog (Shell parent, int style) { |
| super (parent, checkStyle (parent, style)); |
| checkSubclass (); |
| } |
| |
| long CCHookProc (long hdlg, long uiMsg, long lParam, long lpData) { |
| switch ((int)uiMsg) { |
| case OS.WM_INITDIALOG: { |
| if (title != null && title.length () != 0) { |
| TCHAR buffer = new TCHAR (0, title, true); |
| OS.SetWindowText (hdlg, buffer); |
| } |
| 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; |
| } |
| |
| /** |
| * Returns an array of <code>RGB</code>s which are the list of |
| * custom colors selected by the user in the receiver, or null |
| * if no custom colors were selected. |
| * |
| * @return the array of RGBs, which may be null |
| * |
| * @since 3.8 |
| */ |
| public RGB[] getRGBs() { |
| return rgbs; |
| } |
| |
| /** |
| * 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 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 RGB open () { |
| |
| /* Get the owner HWND for the dialog */ |
| long hwndOwner = parent.handle; |
| long hwndParent = parent.handle; |
| |
| /* |
| * Feature in Windows. There is no API to set the orientation of a |
| * color dialog. It is always inherited from the parent. The fix is |
| * to create a hidden parent and set the orientation in the hidden |
| * parent for the dialog to inherit. |
| */ |
| boolean enabled = false; |
| int dialogOrientation = style & (SWT.LEFT_TO_RIGHT | SWT.RIGHT_TO_LEFT); |
| int parentOrientation = parent.style & (SWT.LEFT_TO_RIGHT | SWT.RIGHT_TO_LEFT); |
| if (dialogOrientation != parentOrientation) { |
| int exStyle = OS.WS_EX_NOINHERITLAYOUT; |
| if (dialogOrientation == SWT.RIGHT_TO_LEFT) exStyle |= OS.WS_EX_LAYOUTRTL; |
| hwndOwner = OS.CreateWindowEx ( |
| exStyle, |
| Shell.DialogClass, |
| null, |
| 0, |
| OS.CW_USEDEFAULT, 0, OS.CW_USEDEFAULT, 0, |
| hwndParent, |
| 0, |
| OS.GetModuleHandle (null), |
| null); |
| enabled = OS.IsWindowEnabled (hwndParent); |
| if (enabled) OS.EnableWindow (hwndParent, false); |
| } |
| |
| /* Create the CCHookProc */ |
| Callback callback = new Callback (this, "CCHookProc", 4); //$NON-NLS-1$ |
| long lpfnHook = callback.getAddress (); |
| |
| /* Allocate the Custom Colors and initialize to white */ |
| Display display = parent.display; |
| if (display.lpCustColors == 0) { |
| long hHeap = OS.GetProcessHeap (); |
| display.lpCustColors = OS.HeapAlloc (hHeap, OS.HEAP_ZERO_MEMORY, CUSTOM_COLOR_COUNT * 4); |
| for (int i=0; i < CUSTOM_COLOR_COUNT; i++) { |
| colors[i] = 0x00FFFFFF; |
| } |
| OS.MoveMemory (display.lpCustColors, colors, CUSTOM_COLOR_COUNT * 4); |
| } |
| |
| /* Set the Custom Colors (if any) into the dialog */ |
| if (rgbs != null) { |
| int length = rgbs.length > CUSTOM_COLOR_COUNT ? CUSTOM_COLOR_COUNT : rgbs.length; |
| for (int i=0; i<length; i++) { |
| RGB rgb = rgbs [i]; |
| int red = rgb.red & 0xFF; |
| int green = (rgb.green << 8) & 0xFF00; |
| int blue = (rgb.blue << 16) & 0xFF0000; |
| colors[i] = red | green | blue; |
| } |
| for (int i=length; i < CUSTOM_COLOR_COUNT; i++) { |
| colors[i] = 0x00FFFFFF; |
| } |
| OS.MoveMemory (display.lpCustColors, colors, CUSTOM_COLOR_COUNT * 4); |
| } |
| |
| /* Open the dialog */ |
| CHOOSECOLOR lpcc = new CHOOSECOLOR (); |
| lpcc.lStructSize = CHOOSECOLOR.sizeof; |
| lpcc.Flags = OS.CC_ANYCOLOR | OS.CC_ENABLEHOOK; |
| lpcc.lpfnHook = lpfnHook; |
| lpcc.hwndOwner = hwndOwner; |
| lpcc.lpCustColors = display.lpCustColors; |
| if (rgb != 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 */ |
| Dialog oldModal = null; |
| if ((style & (SWT.APPLICATION_MODAL | SWT.SYSTEM_MODAL)) != 0) { |
| oldModal = display.getModalDialog (); |
| display.setModalDialog (this); |
| } |
| |
| display.externalEventLoop = true; |
| display.sendPreExternalEventDispatchEvent (); |
| /* Open the dialog */ |
| boolean success = OS.ChooseColor (lpcc); |
| display.externalEventLoop = false; |
| display.sendPostExternalEventDispatchEvent (); |
| |
| /* Clear the temporary dialog modal parent */ |
| if ((style & (SWT.APPLICATION_MODAL | SWT.SYSTEM_MODAL)) != 0) { |
| display.setModalDialog (oldModal); |
| } |
| |
| /* Get the Custom Colors (if the user defined any) from the dialog */ |
| boolean customColor = false; |
| OS.MoveMemory (colors, display.lpCustColors, colors.length * 4); |
| for (int color : colors) { |
| if (color != 0x00FFFFFF) { |
| customColor = true; |
| break; |
| } |
| } |
| if (customColor) { |
| rgbs = new RGB [CUSTOM_COLOR_COUNT]; |
| for (int i=0; i<colors.length; i++) { |
| int color = colors[i]; |
| int red = color & 0xFF; |
| int green = (color >> 8) & 0xFF; |
| int blue = (color >> 16) & 0xFF; |
| rgbs[i] = new RGB (red, green, blue); |
| } |
| } |
| |
| 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 (); |
| |
| /* Destroy the BIDI orientation window */ |
| if (hwndParent != hwndOwner) { |
| if (enabled) OS.EnableWindow (hwndParent, true); |
| OS.SetActiveWindow (hwndParent); |
| OS.DestroyWindow (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; |
| } |
| |
| /** |
| * Sets the receiver's list of custom colors to be the given array |
| * of <code>RGB</code>s, which may be null to let the platform select |
| * a default when open() is called. |
| * |
| * @param rgbs the array of RGBs, which may be null |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT - if an RGB in the rgbs array is null</li> |
| * </ul> |
| * |
| * @since 3.8 |
| */ |
| public void setRGBs(RGB[] rgbs) { |
| if (rgbs != null) { |
| for (RGB rgb : rgbs) { |
| if (rgb == null) error (SWT.ERROR_INVALID_ARGUMENT); |
| } |
| } |
| this.rgbs = rgbs; |
| } |
| |
| } |