/******************************************************************************* * Copyright (c) 2000, 2011 IBM Corporation and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-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. *
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Styles:
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Events:
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* IMPORTANT: This class is not intended to be subclassed. *

* * @see SWT Example: ControlExample, Dialog tab * @see Sample code and further information * @noextend This class is not intended to be subclassed by clients. */ public class FontDialog extends Dialog { FontData fontData; RGB rgb; /** * Constructs a new instance of this class given only its parent. * * @param parent a shell which will be the parent of the new instance * * @exception IllegalArgumentException * @exception SWTException */ public FontDialog (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. *

* The style value is either one of the style constants defined in * class SWT which is applicable to instances of this * class, or must be built by bitwise OR'ing together * (that is, using the int "|" operator) two or more * of those SWT style constants. The class description * lists the style constants that are applicable to the class. * Style bits are also inherited from superclasses. *

* * @param parent a shell which will be the parent of the new instance * @param style the style of dialog to construct * * @exception IllegalArgumentException * @exception SWTException */ public FontDialog (Shell parent, int style) { super (parent, checkStyle (parent, style)); checkSubclass (); } /** * Returns true if the dialog's effects selection controls * are visible, and false otherwise. *

* If the platform's font dialog does not have any effects selection controls, * then this method always returns false. *

* * @return true if the dialog's effects selection controls * are visible and false otherwise * * @since 3.8 */ public boolean getEffectsVisible () { // The GTK FontDialog does not have any effects selection controls. return false; } /** * 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 * @deprecated use #getFontList () */ public FontData getFontData () { return fontData; } /** * Returns a FontData set describing the font that was * selected in the dialog, or null if none is available. * * @return the FontData for the selected font, or null * @since 2.1.1 */ public FontData [] getFontList () { if (fontData == null) return null; FontData [] result = new FontData [1]; result [0] = fontData; return result; } /** * Returns an RGB describing the color that was selected * in the dialog, or null if none is available. * * @return the RGB value for the selected color, or null * * @see PaletteData#getRGBs * * @since 2.1 */ 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 */ public FontData open () { int /*long*/ handle; byte [] titleBytes; titleBytes = Converter.wcsToMbcs (null, title, true); Display display = parent != null ? parent.getDisplay (): Display.getCurrent (); handle = OS.gtk_font_selection_dialog_new (titleBytes); if (parent!=null) { int /*long*/ shellHandle = parent.topHandle (); OS.gtk_window_set_transient_for(handle, shellHandle); int /*long*/ pixbufs = OS.gtk_window_get_icon_list (shellHandle); if (pixbufs != 0) { OS.gtk_window_set_icon_list (handle, pixbufs); OS.g_list_free (pixbufs); } } if (OS.GTK_VERSION >= OS.VERSION (2, 10, 0)) { int /*long*/ group = OS.gtk_window_get_group(0); OS.gtk_window_group_add_window (group, handle); } OS.gtk_window_set_modal (handle, true); if (fontData != null) { Font font = new Font (display, fontData); int /*long*/ fontName = OS.pango_font_description_to_string (font.handle); int length = OS.strlen (fontName); byte [] buffer = new byte [length + 1]; OS.memmove (buffer, fontName, length); font.dispose(); OS.g_free (fontName); OS.gtk_font_selection_dialog_set_font_name (handle, buffer); } display.addIdleProc (); Dialog oldModal = null; if (OS.gtk_window_get_modal (handle)) { oldModal = display.getModalDialog (); display.setModalDialog (this); } int signalId = 0; int /*long*/ hookId = 0; if ((style & SWT.RIGHT_TO_LEFT) != 0) { signalId = OS.g_signal_lookup (OS.map, OS.GTK_TYPE_WIDGET()); hookId = OS.g_signal_add_emission_hook (signalId, 0, display.emissionProc, handle, 0); } int response = OS.gtk_dialog_run (handle); /* * This call to gdk_threads_leave() is a temporary work around * to avoid deadlocks when gdk_threads_init() is called by native * code outside of SWT (i.e AWT, etc). It ensures that the current * thread leaves the GTK lock acquired by the function above. */ OS.gdk_threads_leave(); if ((style & SWT.RIGHT_TO_LEFT) != 0) { OS.g_signal_remove_emission_hook (signalId, hookId); } if (OS.gtk_window_get_modal (handle)) { display.setModalDialog (oldModal); } boolean success = response == OS.GTK_RESPONSE_OK; if (success) { int /*long*/ fontName = OS.gtk_font_selection_dialog_get_font_name (handle); int length = OS.strlen (fontName); byte [] buffer = new byte [length + 1]; OS.memmove (buffer, fontName, length); OS.g_free (fontName); int /*long*/ fontDesc = OS.pango_font_description_from_string (buffer); Font font = Font.gtk_new (display, fontDesc); fontData = font.getFontData () [0]; OS.pango_font_description_free (fontDesc); } display.removeIdleProc (); OS.gtk_widget_destroy(handle); if (!success) return null; return fontData; } /** * Sets the effects selection controls in the dialog visible if the * argument is true, and invisible otherwise. *

* By default the effects selection controls are displayed if the * platform font dialog supports effects selection. *

* * @param visible whether or not the dialog will show the effects selection controls * * @since 3.8 */ public void setEffectsVisible(boolean visible) { // The GTK FontDialog does not have any effects selection controls. } /** * 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 * @deprecated use #setFontList (FontData []) */ public void setFontData (FontData fontData) { this.fontData = fontData; } /** * Sets the set of FontData objects describing the font to * be selected by default in the dialog, or null to let * the platform choose one. * * @param fontData the set of FontData objects to use initially, or null * to let the platform select a default when open() is called * * @see Font#getFontData * * @since 2.1.1 */ public void setFontList (FontData [] fontData) { if (fontData != null && fontData.length > 0) { this.fontData = fontData [0]; } else { this.fontData = null; } } /** * Sets the RGB describing the color to be selected by default * in the dialog, or null to let the platform choose one. * * @param rgb the RGB value to use initially, or null to let * the platform select a default when open() is called * * @see PaletteData#getRGBs * * @since 2.1 */ public void setRGB (RGB rgb) { this.rgb = rgb; } }