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/*******************************************************************************
* Copyright (c) 2005, 2007 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.cdt.debug.internal.ui.dialogfields;
import org.eclipse.core.runtime.Assert;
import org.eclipse.swt.SWT;
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.swt.widgets.Control;
import org.eclipse.swt.widgets.Group;
import org.eclipse.swt.widgets.Label;
/**
* Dialog field describing a group with buttons (Checkboxes, radio buttons..)
*/
public class SelectionButtonDialogFieldGroup extends DialogField {
private Composite fButtonComposite;
private Button[] fButtons;
private String[] fButtonNames;
private boolean[] fButtonsSelected;
private boolean[] fButtonsEnabled;
private int fGroupBorderStyle;
private int fGroupNumberOfColumns;
private int fButtonsStyle;
/**
* Creates a group without border.
*/
public SelectionButtonDialogFieldGroup(int buttonsStyle, String[] buttonNames, int nColumns) {
this(buttonsStyle, buttonNames, nColumns, SWT.NONE);
}
/**
* Creates a group with border (label in border).
* Accepted button styles are: SWT.RADIO, SWT.CHECK, SWT.TOGGLE
* For border styles see <code>Group</code>
*/
public SelectionButtonDialogFieldGroup(int buttonsStyle, String[] buttonNames, int nColumns, int borderStyle) {
super();
Assert.isTrue(buttonsStyle == SWT.RADIO || buttonsStyle == SWT.CHECK || buttonsStyle == SWT.TOGGLE);
fButtonNames= buttonNames;
int nButtons= buttonNames.length;
fButtonsSelected= new boolean[nButtons];
fButtonsEnabled= new boolean[nButtons];
for (int i= 0; i < nButtons; i++) {
fButtonsSelected[i]= false;
fButtonsEnabled[i]= true;
}
if (buttonsStyle == SWT.RADIO) {
fButtonsSelected[0]= true;
}
fGroupBorderStyle= borderStyle;
fGroupNumberOfColumns= (nColumns <= 0) ? nButtons : nColumns;
fButtonsStyle= buttonsStyle;
}
// ------- layout helpers
/*
* @see DialogField#doFillIntoGrid
*/
@Override
public Control[] doFillIntoGrid(Composite parent, int nColumns) {
assertEnoughColumns(nColumns);
if (fGroupBorderStyle == SWT.NONE) {
Label label= getLabelControl(parent);
label.setLayoutData(gridDataForLabel(1));
Composite buttonsgroup= getSelectionButtonsGroup(parent);
GridData gd= new GridData();
gd.horizontalSpan= nColumns - 1;
buttonsgroup.setLayoutData(gd);
return new Control[] { label, buttonsgroup };
}
Composite buttonsgroup= getSelectionButtonsGroup(parent);
GridData gd= new GridData();
gd.horizontalSpan= nColumns;
buttonsgroup.setLayoutData(gd);
return new Control[] { buttonsgroup };
}
/*
* @see DialogField#doFillIntoGrid
*/
@Override
public int getNumberOfControls() {
return (fGroupBorderStyle == SWT.NONE) ? 2 : 1;
}
// ------- ui creation
private Button createSelectionButton(int index, Composite group, SelectionListener listener) {
Button button= new Button(group, fButtonsStyle | SWT.LEFT);
button.setFont(group.getFont());
button.setText(fButtonNames[index]);
button.setEnabled(isEnabled() && fButtonsEnabled[index]);
button.setSelection(fButtonsSelected[index]);
button.addSelectionListener(listener);
button.setLayoutData(new GridData());
return button;
}
/**
* Returns the group widget. When called the first time, the widget will be created.
* @param The parent composite when called the first time, or <code>null</code>
* after.
*/
public Composite getSelectionButtonsGroup(Composite parent) {
if (fButtonComposite == null) {
assertCompositeNotNull(parent);
GridLayout layout= new GridLayout();
layout.makeColumnsEqualWidth= true;
layout.numColumns= fGroupNumberOfColumns;
if (fGroupBorderStyle != SWT.NONE) {
Group group= new Group(parent, fGroupBorderStyle);
if (fLabelText != null && fLabelText.length() > 0) {
group.setText(fLabelText);
}
fButtonComposite= group;
} else {
fButtonComposite= new Composite(parent, SWT.NULL);
layout.marginHeight= 0;
layout.marginWidth= 0;
}
fButtonComposite.setLayout(layout);
SelectionListener listener= new SelectionListener() {
@Override
public void widgetDefaultSelected(SelectionEvent e) {
doWidgetSelected(e);
}
@Override
public void widgetSelected(SelectionEvent e) {
doWidgetSelected(e);
}
};
int nButtons= fButtonNames.length;
fButtons= new Button[nButtons];
for (int i= 0; i < nButtons; i++) {
fButtons[i]= createSelectionButton(i, fButtonComposite, listener);
}
int nRows= nButtons / fGroupNumberOfColumns;
int nFillElements= nRows * fGroupNumberOfColumns - nButtons;
for (int i= 0; i < nFillElements; i++) {
createEmptySpace(fButtonComposite);
}
}
return fButtonComposite;
}
/**
* Returns a button from the group or <code>null</code> if not yet created.
*/
public Button getSelectionButton(int index) {
if (index >= 0 && index < fButtons.length) {
return fButtons[index];
}
return null;
}
protected void doWidgetSelected(SelectionEvent e) {
Button button= (Button)e.widget;
for (int i= 0; i < fButtons.length; i++) {
if (fButtons[i] == button) {
fButtonsSelected[i]= button.getSelection();
dialogFieldChanged();
return;
}
}
}
// ------ model access
/**
* Returns the selection state of a button contained in the group.
* @param The index of the button
*/
public boolean isSelected(int index) {
if (index >= 0 && index < fButtonsSelected.length) {
return fButtonsSelected[index];
}
return false;
}
/**
* Sets the selection state of a button contained in the group.
*/
public void setSelection(int index, boolean selected) {
if (index >= 0 && index < fButtonsSelected.length) {
if (fButtonsSelected[index] != selected) {
fButtonsSelected[index]= selected;
if (fButtons != null) {
Button button= fButtons[index];
if (isOkToUse(button)) {
button.setSelection(selected);
}
}
}
}
}
// ------ enable / disable management
@Override
protected void updateEnableState() {
super.updateEnableState();
if (fButtons != null) {
boolean enabled= isEnabled();
for (int i= 0; i < fButtons.length; i++) {
Button button= fButtons[i];
if (isOkToUse(button)) {
button.setEnabled(enabled && fButtonsEnabled[i]);
}
}
}
}
/**
* Sets the enable state of a button contained in the group.
*/
public void enableSelectionButton(int index, boolean enable) {
if (index >= 0 && index < fButtonsEnabled.length) {
fButtonsEnabled[index]= enable;
if (fButtons != null) {
Button button= fButtons[index];
if (isOkToUse(button)) {
button.setEnabled(isEnabled() && enable);
}
}
}
}
}
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