| 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.*; |
| import org.eclipse.swt.internal.*; |
| import org.eclipse.swt.internal.gtk.*; |
| import org.eclipse.swt.graphics.*; |
| |
| /** |
| * 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 SWT implementation. |
| * </p> |
| */ |
| public class ColorDialog extends Dialog { |
| 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 (cannot be null) |
| * |
| * @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.NULL); |
| } |
| /** |
| * 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, style); |
| checkSubclass (); |
| } |
| |
| /** |
| * 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 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 () { |
| byte [] buffer = Converter.wcsToMbcs (null, title, true); |
| int handle = OS.gtk_color_selection_dialog_new (buffer); |
| if (parent!=null) { |
| OS.gtk_window_set_transient_for(handle, parent.topHandle()); |
| } |
| GtkColorSelectionDialog dialog = new GtkColorSelectionDialog (); |
| OS.memmove(dialog, handle); |
| GdkColor color = new GdkColor(); |
| if (rgb != null) { |
| color.red = (short)((rgb.red & 0xFF) | ((rgb.red & 0xFF) << 8)); |
| color.green = (short)((rgb.green & 0xFF) | ((rgb.green & 0xFF) << 8)); |
| color.blue = (short)((rgb.blue & 0xFF) | ((rgb.blue & 0xFF) << 8)); |
| OS.gtk_color_selection_set_current_color (dialog.colorsel, color); |
| } |
| int response = OS.gtk_dialog_run(handle); |
| boolean success = response == OS.GTK_RESPONSE_OK; |
| if (success) { |
| OS.gtk_color_selection_get_current_color (dialog.colorsel, color); |
| int red = (color.red >> 8) & 0xFF; |
| int green = (color.green >> 8) & 0xFF; |
| int blue = (color.blue >> 8) & 0xFF; |
| rgb = new RGB (red, green, blue); |
| } |
| OS.gtk_widget_destroy(handle); |
| 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 to select a default when |
| * open() is called |
| * @see PaletteData#getRGBs |
| */ |
| public void setRGB (RGB rgb) { |
| this.rgb = rgb; |
| } |
| } |