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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.widgets.*;
import org.eclipse.swt.internal.carbon.*;
import org.eclipse.swt.graphics.RGB;
/**
* 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 /*final*/ class ColorDialog extends Dialog {
private RGB rgb;
private short[] fColor= new short[3];
/**
* 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 | SWT.TITLE | SWT.BORDER | SWT.APPLICATION_MODAL);
}
/**
* 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() {
MacPoint mp= new MacPoint();
OS.GetGlobalMouse(mp.getData());
boolean[] success= new boolean[1];
if (OS.PickColor(fColor, mp.getData(), MacUtil.Str255(title), success) == OS.kNoErr) {
if (success[0]) {
if (rgb == null)
rgb= new RGB(0, 0, 0);
rgb.red= (fColor[0] >> 8) & 0xff;
rgb.green= (fColor[1] >> 8) & 0xff;
rgb.blue= (fColor[2] >> 8) & 0xff;
} else
rgb= null;
} else
rgb= null;
return rgb;
}
/**
* Returns 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;
fColor[0]= (short) (rgb.red * 257);
fColor[1]= (short) (rgb.green * 257);
fColor[2]= (short) (rgb.blue * 257);
}
}
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