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/*******************************************************************************
* Copyright (c) 2011 Wind River Systems, Inc. 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:
* Wind River Systems - initial API and implementation
*******************************************************************************/
package org.eclipse.tcf.te.ui.forms.parts;
import java.util.Arrays;
import org.eclipse.core.runtime.Assert;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.layout.PixelConverter;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.forms.widgets.FormToolkit;
/**
* Abstract part with buttons implementation.
*/
public abstract class AbstractPartWithButtons extends AbstractPart {
// The button labels
private final String[] labels;
// The buttons list
private Button[] buttons = null;
/**
* Constructor.
*
* @param labels The list of label to apply to the created buttons in the given order. Must not be <code>null</code>.
*/
public AbstractPartWithButtons(String[] labels) {
super();
Assert.isNotNull(labels);
this.labels = labels;
}
/* (non-Javadoc)
* @see org.eclipse.tcf.te.ui.forms.parts.AbstractPart#createControl(org.eclipse.swt.widgets.Composite, int, int, org.eclipse.ui.forms.widgets.FormToolkit)
*/
@Override
public void createControl(Composite parent, int style, int span, FormToolkit toolkit) {
Assert.isNotNull(parent);
createMainLabel(parent, span, toolkit);
createMainControl(parent, style, span - 1, toolkit);
createButtonsPanel(parent, toolkit);
}
/**
* Creates the part main control(s).
*
* @param parent The parent composite. Must not be <code>null</code>.
* @param style The control style if applicable.
* @param span The horizontal span if applicable.
* @param toolkit The form toolkit or <code>null</code>.
*/
protected abstract void createMainControl(Composite parent, int style, int span, FormToolkit toolkit);
/**
* Create the part main label control.
*
* @param parent The parent composite. Must not be <code>null</code>.
* @param span The horizontal span if applicable.
* @param toolkit The form toolkit or <code>null</code>.
*/
protected void createMainLabel(Composite parent, int span, FormToolkit toolkit) {
Assert.isNotNull(parent);
}
/**
* Create the buttons panel.
*
* @param parent The parent composite. Must not be <code>null</code>.
* @param toolkit The form toolkit or <code>null</code>.
*
* @return The buttons panel composite or <code>null</code>.
*/
protected Composite createButtonsPanel(Composite parent, FormToolkit toolkit) {
if (labels.length == 0) {
return null;
}
buttons = new Button[labels.length];
Composite panel = createComposite(parent, toolkit);
GridLayout layout = new GridLayout();
layout.marginHeight = 0; layout.marginWidth = 0;
panel.setLayout(layout);
GridData layoutData = new GridData(SWT.BEGINNING, SWT.FILL, false, true);
panel.setLayoutData(layoutData);
panel.setBackground(parent.getBackground());
SelectionListener listener = new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
AbstractPartWithButtons.this.onButtonSelected((Button) e.widget);
}
};
for (int i = 0; i < labels.length; i++) {
if (labels[i] != null) {
Button button = toolkit != null ? toolkit.createButton(panel, null, SWT.PUSH) : new Button(panel, SWT.PUSH);
Assert.isNotNull(button);
button.setFont(JFaceResources.getDialogFont());
button.setText(labels[i]);
button.setData(Integer.valueOf(i));
button.setBackground(panel.getBackground());
button.addSelectionListener(listener);
onButtonCreated(button);
layoutData = new GridData(SWT.FILL, SWT.BEGINNING, true, false);
layoutData.widthHint = Math.max(new PixelConverter(button).convertHorizontalDLUsToPixels(IDialogConstants.BUTTON_WIDTH), button.computeSize(SWT.DEFAULT, SWT.DEFAULT, true).x);
button.setLayoutData(layoutData);
buttons[i] = button;
} else {
createEmptySpace(panel, 1, toolkit);
}
}
return panel;
}
/**
* Called from {@link #createButtonsPanel(Composite, FormToolkit)} for each created button.
* <p>
* <b>Note:</b> The button layout data is set by {@link #createButtonsPanel(Composite, FormToolkit)}
* after this method has been returned.
*
* @param button The created button. Must not be <code>null</code>.
*/
protected void onButtonCreated(Button button) {
Assert.isNotNull(button);
}
/**
* Called from the buttons selection listener to signal when
* the user clicked on the button.
*
* @param button The button selected. Must not be <code>null</code>
*/
protected void onButtonSelected(Button button) {
Assert.isNotNull(button);
}
/* (non-Javadoc)
* @see org.eclipse.tcf.te.ui.forms.parts.AbstractPart#onEnabledStateChanged()
*/
@Override
protected void onEnabledStateChanged() {
for (Button button : buttons) {
if (button != null && !button.isDisposed()) {
button.setEnabled(isEnabled());
}
}
}
/**
* Returns the button with the given label.
*
* @param label The button label.
* @return The button.
*
* @throws ArrayIndexOutOfBoundsException if the label is invalid.
*/
public Button getButton(String label) {
return getButton(Arrays.asList(labels).indexOf(label));
}
/**
* Returns the button at the given index.
*
* @param index The index.
* @return The button.
*
* @throws ArrayIndexOutOfBoundsException if the index is out of bounds.
*/
public Button getButton(int index) {
return buttons[index];
}
}
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