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/*******************************************************************************
* Copyright (c) 2000, 2006 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.team.internal.ui.dialogs;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.eclipse.jface.dialogs.*;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.util.IPropertyChangeListener;
import org.eclipse.jface.util.PropertyChangeEvent;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.*;
/**
* This class provides facilities to allow common widget groupings to be shared
* by mulitple dialogs or wizards.
*/
public abstract class DialogArea {
private FontMetrics fontMetrics;
private List listeners;
/**
* Create a dialog area
*/
protected DialogArea() {
this.listeners = new ArrayList();
}
/**
* Listener for property change events. The only event of interest is for
* property SELECTED_WORKING_SET which contains the selected working set or
* <code>null</code> if none is selected.
*
* @param listener
*/
public void addPropertyChangeListener(IPropertyChangeListener listener) {
if (!listeners.contains(listener))
listeners.add(listener);
}
/**
* Remove the provided listener from the receiver.
*
* @param listener
*/
public void removePropertyChangeListener(IPropertyChangeListener listener) {
listeners.remove(listener);
}
protected void firePropertyChangeChange(String property, Object oldValue, Object newValue) {
PropertyChangeEvent event = new PropertyChangeEvent(this, property, oldValue, newValue);
for (Iterator iter = listeners.iterator(); iter.hasNext();) {
IPropertyChangeListener listener = (IPropertyChangeListener) iter.next();
listener.propertyChange(event);
}
}
/**
* Code copied from <code>org.eclipse.jface.dialogs.Dialog</code> to obtain
* a FontMetrics.
*
* @param control a control from which to obtain the current font
*
* @see org.eclipse.jface.dialogs.Dialog
*/
protected void initializeDialogUnits(Control control) {
// Compute and store a font metric
GC gc = new GC(control);
gc.setFont(control.getFont());
fontMetrics = gc.getFontMetrics();
gc.dispose();
}
/**
* Create the area using the given parent as the containing composite
* @param parent
*/
public abstract void createArea(Composite parent);
protected Button createCheckbox(Composite parent, String label, int span) {
Button button = new Button(parent, SWT.CHECK | SWT.LEFT);
button.setText(label);
button.setFont(parent.getFont());
GridData data = new GridData();
data.horizontalSpan = span;
button.setLayoutData(data);
return button;
}
protected Button createButton(Composite parent, String label, int style) {
Button button = new Button(parent, SWT.PUSH);
button.setText(label);
// we need to explicitly set the font to the parent's font for dialogs
button.setFont(parent.getFont());
GridData data = new GridData(style);
data.heightHint = Dialog.convertVerticalDLUsToPixels(fontMetrics, IDialogConstants.BUTTON_HEIGHT);
int widthHint = Dialog.convertHorizontalDLUsToPixels(fontMetrics, IDialogConstants.BUTTON_WIDTH);
data.widthHint = Math.max(widthHint, button.computeSize(SWT.DEFAULT, SWT.DEFAULT, true).x);
button.setLayoutData(data);
return button;
}
protected Button createRadioButton(Composite parent, String label, int span) {
Button button = new Button(parent, SWT.RADIO);
button.setText(label);
GridData data = new GridData();
data.horizontalSpan = span;
button.setLayoutData(data);
return button;
}
protected Label createWrappingLabel(Composite parent, String text, int horizontalSpan) {
Label label = new Label(parent, SWT.LEFT | SWT.WRAP);
label.setText(text);
label.setFont(parent.getFont());
GridData data = new GridData();
data.horizontalSpan = horizontalSpan;
data.horizontalAlignment = GridData.FILL;
data.grabExcessHorizontalSpace = true;
data.widthHint= 0;
label.setLayoutData(data);
return label;
}
protected Label createLabel(Composite parent, String text, int horizontalSpan) {
Label label = new Label(parent, SWT.LEFT);
label.setText(text);
GridData data = new GridData();
data.horizontalSpan = horizontalSpan;
data.horizontalAlignment = GridData.FILL;
label.setLayoutData(data);
return label;
}
/**
* Creates composite control and sets the default layout data.
* @param parent the parent of the new composite
* @param numColumns the number of columns for the new composite
* @param grab specify whether the composite should grab for excessive space in both directions.
* @return the newly-created coposite
*/
protected Composite createComposite(Composite parent, int numColumns, boolean grab) {
final Composite composite = new Composite(parent, SWT.NULL);
final Font font = parent.getFont();
composite.setFont(font);
composite.setLayout(new GridLayout(numColumns, false));
composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, grab, grab));
return composite;
}
/**
* Creates composite control and sets the default layout data.
*
* @param parent the parent of the new composite
* @param numColumns the number of columns for the new composite
* @return the newly-created coposite
*/
protected Composite createGrabbingComposite(Composite parent, int numColumns) {
Composite composite = new Composite(parent, SWT.NULL);
Font font = parent.getFont();
composite.setFont(font);
// GridLayout
GridLayout layout = new GridLayout();
layout.numColumns = numColumns;
layout.marginHeight = 0;
layout.marginWidth = 0;
composite.setLayout(layout);
// GridData
GridData data = new GridData();
data.verticalAlignment = GridData.FILL;
data.horizontalAlignment = GridData.FILL;
data.grabExcessHorizontalSpace = true;
data.grabExcessVerticalSpace = true;
composite.setLayoutData(data);
return composite;
}
protected int convertVerticalDLUsToPixels(int dlus) {
return Dialog.convertVerticalDLUsToPixels(fontMetrics, dlus);
}
protected int convertHorizontalDLUsToPixels(int dlus) {
return Dialog.convertHorizontalDLUsToPixels(fontMetrics, dlus);
}
}
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