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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.internal.*;
import org.eclipse.swt.internal.photon.*;
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.widgets.*;
/**
* Instances of this class allow the user to select a font
* from all available fonts in the system.
* <p>
* IMPORTANT: This class is intended to be subclassed <em>only</em>
* within the SWT implementation.
* </p>
*/
public class FontDialog extends Dialog {
FontData fontData;
RGB rgb;
/**
* Constructs a new instance of this class given only its
* parent.
* <p>
* Note: Currently, null can be passed in for the parent.
* This has the effect of creating the dialog on the currently active
* display if there is one. If there is no current display, the
* dialog is created on a "default" display. <b>Passing in null as
* the parent is not considered to be good coding style,
* and may not be supported in a future release of SWT.</b>
* </p>
*
* @param parent a shell 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>
*/
public FontDialog (Shell parent) {
this (parent, SWT.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>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>
* Note: Currently, null can be passed in for the parent.
* This has the effect of creating the dialog on the currently active
* display if there is one. If there is no current display, the
* dialog is created on a "default" display. <b>Passing in null as
* the parent is not considered to be good coding style,
* and may not be supported in a future release of SWT.</b>
* </p>
*
* @param parent a shell 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>
*/
public FontDialog (Shell parent, int style) {
super (parent, style);
checkSubclass ();
}
/**
* Returns a FontData object describing the font that was
* selected in the dialog, or null if none is available.
*
* @return the FontData for the selected font, or null
*/
public FontData getFontData() {
return fontData;
}
/**
* 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 dialog visible and brings it to the front
* of the display.
*
* @return a FontData object describing the font that was selected,
* or null if the dialog was cancelled or an error occurred
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the dialog has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the dialog</li>
* </ul>
*/
public FontData open () {
int parentHandle = 0;
if (parent != null && OS.PtWidgetIsRealized(parent.shellHandle)) {
parentHandle = parent.shellHandle;
}
byte [] title = null;
if (this.title != null) title = Converter.wcsToMbcs (null, this.title, true);
byte[] font = null;
if (fontData != null) {
if (fontData.stem != null) {
font = fontData.stem;
} else {
byte[] description = Converter.wcsToMbcs(null, fontData.getName(), true);
int osStyle = 0, style = fontData.getStyle();
if ((style & SWT.BOLD) != 0) osStyle |= OS.PF_STYLE_BOLD;
if ((style & SWT.ITALIC) != 0) osStyle |= OS.PF_STYLE_ITALIC;
int size = fontData.getHeight();
font = OS.PfGenerateFontName(description, osStyle, size, new byte[OS.MAX_FONT_TAG]);
}
fontData = null;
}
int flags = OS.PHFONT_ALL_FONTS | OS.PHFONT_DONT_SHOW_LEGACY;
int fontPtr = OS.PtFontSelection (parentHandle, null, title, font, OS.PHFONT_ALL_SYMBOLS, flags, null);
if (fontPtr != 0) {
int length = OS.strlen (fontPtr);
font = new byte [length + 1];
OS.memmove (font, fontPtr, length);
fontData = FontData.photon_new (font);
}
return fontData;
}
/**
* Sets a FontData object describing the font to be
* selected by default in the dialog, or null to let
* the platform choose one.
*
* @param fontData the FontData to use initially, or null
*/
public void setFontData (FontData fontData) {
this.fontData = fontData;
}
/**
* 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;
}
}
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