| /******************************************************************************* |
| * Copyright (c) 2000, 2003 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are 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 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.widgets; |
| |
| |
| 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 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; |
| /** |
| * 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 |
| * for all SWT dialog classes should include a comment which |
| * describes the style constants which are applicable to the class. |
| * </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 (); |
| } |
| int cancelFunc (int widget, int callData) { |
| OS.gtk_widget_destroy (callData); |
| return 0; |
| } |
| int destroyFunc (int widget, int colorInfo) { |
| OS.gtk_main_quit (); |
| return 0; |
| } |
| /** |
| * 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; |
| } |
| int okFunc (int widget, int callData) { |
| int hFontName = OS.gtk_font_selection_dialog_get_font_name (callData); |
| int fontSize = OS.strlen (hFontName); |
| byte [] buffer = new byte [fontSize]; |
| OS.memmove (buffer, hFontName, fontSize); |
| char [] fontName = Converter.mbcsToWcs (null, buffer); |
| fontData = FontData.gtk_new(new String (fontName)); |
| OS.gtk_widget_destroy (callData); |
| return 0; |
| } |
| /** |
| * 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 handle; |
| byte [] titleBytes; |
| titleBytes = Converter.wcsToMbcs (null, title, true); |
| handle = OS.gtk_font_selection_dialog_new (titleBytes); |
| GtkFontSelectionDialog dialog = new GtkFontSelectionDialog (); |
| OS.memmove (dialog, handle, GtkFontSelectionDialog.sizeof); |
| if (parent!=null) { |
| OS.gtk_window_set_modal(handle, true); |
| OS.gtk_window_set_transient_for(handle, parent.topHandle); |
| } |
| if (fontData != null) { |
| byte[] buffer = Converter.wcsToMbcs(null, fontData.gtk_getXlfd(), true); |
| OS.gtk_font_selection_set_font_name(dialog.fontsel, buffer); |
| } |
| Callback destroyCallback = new Callback (this, "destroyFunc", 2); |
| int destroyFunc = destroyCallback.getAddress (); |
| byte [] destroy = Converter.wcsToMbcs (null, "destroy", true); |
| OS.gtk_signal_connect (handle, destroy, destroyFunc, handle); |
| byte [] clicked = Converter.wcsToMbcs (null, "clicked", true); |
| Callback okCallback = new Callback (this, "okFunc", 2); |
| int okFunc = okCallback.getAddress (); |
| Callback cancelCallback = new Callback (this, "cancelFunc", 2); |
| int cancelFunc = cancelCallback.getAddress (); |
| OS.gtk_signal_connect (dialog.ok_button, clicked, okFunc, handle); |
| OS.gtk_signal_connect (dialog.cancel_button, clicked, cancelFunc, handle); |
| fontData = null; |
| OS.gtk_widget_show_now (handle); |
| OS.gtk_main (); |
| destroyCallback.dispose (); |
| okCallback.dispose (); |
| cancelCallback.dispose (); |
| 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; |
| } |
| } |