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/***************************************************************************
* Copyright (c) 2004 - 2008 Eike Stepper, Germany.
* 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:
* Eike Stepper - initial API and implementation
**************************************************************************/
package org.eclipse.net4j.util.ui;
import org.eclipse.net4j.util.internal.ui.security.InteractiveCredentialsProvider;
import org.eclipse.net4j.util.security.IPasswordCredentialsProvider;
import org.eclipse.jface.fieldassist.FieldDecoration;
import org.eclipse.jface.fieldassist.FieldDecorationRegistry;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Widget;
import org.eclipse.ui.PlatformUI;
/**
* @author Eike Stepper
*/
public final class UIUtil
{
private UIUtil()
{
}
public static void dispose(Font font)
{
if (font != null)
{
font.dispose();
}
}
public static void dispose(Color color)
{
if (color != null)
{
color.dispose();
}
}
public static void dispose(Widget widget)
{
if (widget != null)
{
widget.dispose();
}
}
public static Font getBoldFont(Control control)
{
FontData[] datas = control.getFont().getFontData().clone();
datas[0].setStyle(SWT.BOLD);
Display display = control.getShell().getDisplay();
Font font = new Font(display, datas);
return font;
}
public static Display getDisplay()
{
Display display = Display.getCurrent();
if (display == null)
{
try
{
display = PlatformUI.getWorkbench().getDisplay();
}
catch (RuntimeException ignore)
{
}
}
if (display == null)
{
display = Display.getDefault();
}
if (display == null)
{
display = new Display();
}
if (display == null)
{
throw new IllegalStateException("No display available");
}
return display;
}
public static IPasswordCredentialsProvider createInteractiveCredentialsProvider()
{
return new InteractiveCredentialsProvider();
}
public static Composite createGridComposite(Composite parent, int columns)
{
Composite composite = new Composite(parent, SWT.NONE);
composite.setLayout(createGridLayout(columns));
return composite;
}
public static GridLayout createGridLayout(int columns)
{
GridLayout layout = new GridLayout();
layout.numColumns = columns;
layout.marginHeight = 0;
layout.marginWidth = 0;
layout.verticalSpacing = 0;
layout.horizontalSpacing = 0;
return layout;
}
public static GridData createGridData()
{
return new GridData(SWT.FILL, SWT.FILL, true, true);
}
public static GridData createGridData(boolean grabHorizontal, boolean grabVertical)
{
return new GridData(SWT.FILL, SWT.FILL, grabHorizontal, grabVertical);
}
public static void addDecorationMargin(Control control)
{
Object data = control.getLayoutData();
if (data instanceof GridData)
{
GridData gd = (GridData)data;
FieldDecorationRegistry registry = FieldDecorationRegistry.getDefault();
FieldDecoration dec = registry.getFieldDecoration(FieldDecorationRegistry.DEC_CONTENT_PROPOSAL);
gd.horizontalIndent = dec.getImage().getBounds().width;
}
}
}
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