bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/FontDialog.java - platform/eclipse.platform.swt - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2019 IBM Corporation and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
  * https://www.eclipse.org/legal/epl-2.0/
  *
  * SPDX-License-Identifier: EPL-2.0
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.swt.widgets;


 import org.eclipse.swt.*;
 import org.eclipse.swt.graphics.*;
 import org.eclipse.swt.internal.*;
 import org.eclipse.swt.internal.gtk.*;

 /**
  * Instances of this class allow the user to select a font
  * from all available fonts in the system.
  * <dl>
  * <dt><b>Styles:</b></dt>
  * <dd>(none)</dd>
  * <dt><b>Events:</b></dt>
  * <dd>(none)</dd>
  * </dl>
  * <p>
  * IMPORTANT: This class is <em>not</em> intended to be subclassed.
  * </p>
  *
  * @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: ControlExample, Dialog tab</a>
  * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
  * @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 <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.APPLICATION_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>
  *
  * @param parent a shell which will be the parent of the new instance
  * @param style the style of dialog 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>
  */
 public FontDialog (Shell parent, int style) {
 	super (parent, checkStyle (parent, style));
 	checkSubclass ();
 }

 /**
  * Returns <code>true</code> if the dialog's effects selection controls
  * are visible, and <code>false</code> otherwise.
  * <p>
  * If the platform's font dialog does not have any effects selection controls,
  * then this method always returns false.
  * </p>
  *
  * @return <code>true</code> if the dialog's effects selection controls
  * are visible and <code>false</code> 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 ()
  */
 @Deprecated
 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 <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 () {
 	byte[] titleBytes = Converter.javaStringToCString(title);
 	Display display = parent != null ? parent.getDisplay(): Display.getCurrent();
 	long handle = GTK.gtk_font_chooser_dialog_new (titleBytes, 0);

 	if (parent != null) {
 		long shellHandle = parent.topHandle();
 		GTK.gtk_window_set_transient_for(handle, shellHandle);
 	}

 	long defaultWindowGroup = GTK.gtk_window_get_group(0);
 	GTK.gtk_window_group_add_window(defaultWindowGroup, handle);
 	GTK.gtk_window_set_modal(handle, true);

 	display.addIdleProc();
 	Dialog oldModal = display.getModalDialog();
 	display.setModalDialog(this);

 	// Set font chooser dialog to current font
 	if (fontData != null) {
 		Font font = new Font(display, fontData);

 		long fontName = OS.pango_font_description_to_string(font.handle);
 		int length = C.strlen(fontName);
 		byte[] buffer = new byte[length + 1];
 		C.memmove(buffer, fontName, length);
 		font.dispose();
 		OS.g_free(fontName);

 		GTK.gtk_font_chooser_set_font(handle, buffer);
 	}

 	int signalId = 0;
 	long hookId = 0;
 	if ((style & SWT.RIGHT_TO_LEFT) != 0) {
 		signalId = OS.g_signal_lookup(OS.map, GTK.GTK_TYPE_WIDGET());
 		hookId = OS.g_signal_add_emission_hook(signalId, 0, display.emissionProc, handle, 0);
 	}

 	int response;
 	if (GTK.GTK4) {
 		response = SyncDialogUtil.run(display, handle, false);
 	} else {
 		display.externalEventLoop = true;
 		display.sendPreExternalEventDispatchEvent();
 		response = GTK.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.
 		*/
 		GDK.gdk_threads_leave();
 		display.externalEventLoop = false;
 		display.sendPostExternalEventDispatchEvent();
 	}

 	if ((style & SWT.RIGHT_TO_LEFT) != 0) {
 		OS.g_signal_remove_emission_hook(signalId, hookId);
 	}

 	display.setModalDialog(oldModal);

 	boolean success = response == GTK.GTK_RESPONSE_OK;
 	if (success) {
 		long fontName = GTK.gtk_font_chooser_get_font (handle);
 		int length = C.strlen (fontName);
 		byte [] buffer = new byte [length + 1];
 		C.memmove (buffer, fontName, length);
 		OS.g_free (fontName);
 		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);
 	} else {
 		fontData = null;
 	}

 	display.removeIdleProc ();

 	if (GTK.GTK4) {
 		OS.g_object_unref(handle);
 	} else {
 		GTK.gtk_widget_destroy(handle);
 	}

 	return fontData;
 }
 /**
  * Sets the effects selection controls in the dialog visible if the
  * argument is <code>true</code>, and invisible otherwise.
  * <p>
  * By default the effects selection controls are displayed if the
  * platform font dialog supports effects selection.
  * </p>
  *
  * @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 [])
  */
 @Deprecated
 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;
 }

 }
	/*******************************************************************************
	* Copyright (c) 2000, 2019 IBM Corporation and others.
	*
	* This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License 2.0
	* which accompanies this distribution, and is available at
	* https://www.eclipse.org/legal/epl-2.0/
	*
	* SPDX-License-Identifier: EPL-2.0
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.swt.widgets;


	import org.eclipse.swt.*;
	import org.eclipse.swt.graphics.*;
	import org.eclipse.swt.internal.*;
	import org.eclipse.swt.internal.gtk.*;

	/**
	* Instances of this class allow the user to select a font
	* from all available fonts in the system.
	* <dl>
	* <dt><b>Styles:</b></dt>
	* <dd>(none)</dd>
	* <dt><b>Events:</b></dt>
	* <dd>(none)</dd>
	* </dl>
	* <p>
	* IMPORTANT: This class is <em>not</em> intended to be subclassed.
	* </p>
	*
	* @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: ControlExample, Dialog tab</a>
	* @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
	* @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 <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.APPLICATION_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>
	*
	* @param parent a shell which will be the parent of the new instance
	* @param style the style of dialog 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>
	*/
	public FontDialog (Shell parent, int style) {
	super (parent, checkStyle (parent, style));
	checkSubclass ();
	}

	/**
	* Returns <code>true</code> if the dialog's effects selection controls
	* are visible, and <code>false</code> otherwise.
	* <p>
	* If the platform's font dialog does not have any effects selection controls,
	* then this method always returns false.
	* </p>
	*
	* @return <code>true</code> if the dialog's effects selection controls
	* are visible and <code>false</code> 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 ()
	*/
	@Deprecated
	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 <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 () {
	byte[] titleBytes = Converter.javaStringToCString(title);
	Display display = parent != null ? parent.getDisplay(): Display.getCurrent();
	long handle = GTK.gtk_font_chooser_dialog_new (titleBytes, 0);

	if (parent != null) {
	long shellHandle = parent.topHandle();
	GTK.gtk_window_set_transient_for(handle, shellHandle);
	}

	long defaultWindowGroup = GTK.gtk_window_get_group(0);
	GTK.gtk_window_group_add_window(defaultWindowGroup, handle);
	GTK.gtk_window_set_modal(handle, true);

	display.addIdleProc();
	Dialog oldModal = display.getModalDialog();
	display.setModalDialog(this);

	// Set font chooser dialog to current font
	if (fontData != null) {
	Font font = new Font(display, fontData);

	long fontName = OS.pango_font_description_to_string(font.handle);
	int length = C.strlen(fontName);
	byte[] buffer = new byte[length + 1];
	C.memmove(buffer, fontName, length);
	font.dispose();
	OS.g_free(fontName);

	GTK.gtk_font_chooser_set_font(handle, buffer);
	}

	int signalId = 0;
	long hookId = 0;
	if ((style & SWT.RIGHT_TO_LEFT) != 0) {
	signalId = OS.g_signal_lookup(OS.map, GTK.GTK_TYPE_WIDGET());
	hookId = OS.g_signal_add_emission_hook(signalId, 0, display.emissionProc, handle, 0);
	}

	int response;
	if (GTK.GTK4) {
	response = SyncDialogUtil.run(display, handle, false);
	} else {
	display.externalEventLoop = true;
	display.sendPreExternalEventDispatchEvent();
	response = GTK.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.
	*/
	GDK.gdk_threads_leave();
	display.externalEventLoop = false;
	display.sendPostExternalEventDispatchEvent();
	}

	if ((style & SWT.RIGHT_TO_LEFT) != 0) {
	OS.g_signal_remove_emission_hook(signalId, hookId);
	}

	display.setModalDialog(oldModal);

	boolean success = response == GTK.GTK_RESPONSE_OK;
	if (success) {
	long fontName = GTK.gtk_font_chooser_get_font (handle);
	int length = C.strlen (fontName);
	byte [] buffer = new byte [length + 1];
	C.memmove (buffer, fontName, length);
	OS.g_free (fontName);
	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);
	} else {
	fontData = null;
	}

	display.removeIdleProc ();

	if (GTK.GTK4) {
	OS.g_object_unref(handle);
	} else {
	GTK.gtk_widget_destroy(handle);
	}

	return fontData;
	}
	/**
	* Sets the effects selection controls in the dialog visible if the
	* argument is <code>true</code>, and invisible otherwise.
	* <p>
	* By default the effects selection controls are displayed if the
	* platform font dialog supports effects selection.
	* </p>
	*
	* @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 [])
	*/
	@Deprecated
	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;
	}

	}