root/branches/0.2/controlexample/alignabletab.d

/*******************************************************************************
 * Copyright (c) 2000, 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
module controlexample.alignabletab;

private {
import swt.all;
import controlexample.tab;
import controlexample.controlexample;
}
/**
 * <code>AlignableTab</code> is the abstract
 * superclass of example controls that can be
 * aligned.
 */
abstract class AlignableTab : Tab {

    /* Alignment Controls */
    Button leftButton, rightButton, centerButton;

    /* Alignment Group */
    Group alignmentGroup;

    /**
     * Creates the Tab within a given instance_ren of ControlExample.
     */
    this(ControlExample instance_ren) {
        super(instance_ren);
    }

    /**
     * Creates the "Control" group. 
     */
    void createControlGroup () {
        super.createControlGroup ();
        
        /* Create the group */
        alignmentGroup = new Group (controlGroup, SWT.NONE);
        alignmentGroup.setLayout (new GridLayout ());
        alignmentGroup.setLayoutData (new GridData(GridData.HORIZONTAL_ALIGN_FILL |
            GridData.VERTICAL_ALIGN_FILL));
        alignmentGroup.setText (ControlExample.getResourceString("Alignment"));
    
        /* Create the controls */
        leftButton = new Button (alignmentGroup, SWT.RADIO);
        leftButton.setText (ControlExample.getResourceString("Left"));
        centerButton = new Button (alignmentGroup, SWT.RADIO);
        centerButton.setText(ControlExample.getResourceString("Center"));
        rightButton = new Button (alignmentGroup, SWT.RADIO);
        rightButton.setText (ControlExample.getResourceString("Right"));
    
        /* Add the listeners */
        void widgetSelected(SelectionEvent event) {
            AlignableTab c = cast(AlignableTab)event.cData;
            if (!(cast(Button) event.widget).getSelection ()) return;
            c.setExampleWidgetAlignment ();
        };
        leftButton.handleSelection(this, &widgetSelected);
        centerButton.handleSelection(this, &widgetSelected);
        rightButton.handleSelection(this, &widgetSelected);
    }
    
    /**
     * Sets the alignment of the "Example" widgets.
     */
    abstract void setExampleWidgetAlignment ();
    
    /**
     * Sets the state of the "Example" widgets.
     */
    void setExampleWidgetState () {
        super.setExampleWidgetState ();
        Control [] controls = getExampleWidgets ();
        if (controls.length != 0) {
            leftButton.setSelection ((controls [0].getStyle () & SWT.LEFT) != 0);
            centerButton.setSelection ((controls [0].getStyle () & SWT.CENTER) != 0);
            rightButton.setSelection ((controls [0].getStyle () & SWT.RIGHT) != 0);
        }
    }
}