ComboTab.java

/*******************************************************************************
 * Copyright (c) 2000, 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.swt.examples.controlexample;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ControlAdapter;
import org.eclipse.swt.events.ControlEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Group;
import org.eclipse.swt.widgets.TabFolder;
import org.eclipse.swt.widgets.Widget;

class ComboTab extends Tab {

	static String[]	ListData	= { ControlExample.getResourceString("ListData0_0"),
			ControlExample.getResourceString("ListData0_1"), ControlExample.getResourceString("ListData0_2"),
			ControlExample.getResourceString("ListData0_3"), ControlExample.getResourceString("ListData0_4"),
			ControlExample.getResourceString("ListData0_5"), ControlExample.getResourceString("ListData0_6"),
			ControlExample.getResourceString("ListData0_7"), ControlExample.getResourceString("ListData0_8") };
	/* Example widgets and groups that contain them */
	Combo			combo1;

	Group			comboGroup;

	/* Style widgets added to the "Style" group */
	Button			dropDownButton, readOnlyButton, simpleButton;

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

	/**
	 * Creates the "Example" group.
	 */
	void createExampleGroup() {
		super.createExampleGroup();

		/* Create a group for the combo box */
		comboGroup = new Group(exampleGroup, SWT.NONE);
		comboGroup.setLayout(new GridLayout());
		comboGroup.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
		comboGroup.setText("Combo");
	}

	/**
	 * Creates the "Example" widgets.
	 */
	void createExampleWidgets() {

		/* Compute the widget style */
		int style = getDefaultStyle();
		if (dropDownButton.getSelection())
			style |= SWT.DROP_DOWN;
		if (readOnlyButton.getSelection())
			style |= SWT.READ_ONLY;
		if (simpleButton.getSelection())
			style |= SWT.SIMPLE;

		/* Create the example widgets */
		combo1 = new Combo(comboGroup, style);
		combo1.setItems(ComboTab.ListData);
		if (ComboTab.ListData.length >= 3)
			combo1.setText(ComboTab.ListData[2]);
	}

	/**
	 * Creates the "Style" group.
	 */
	void createStyleGroup() {
		super.createStyleGroup();

		/* Create the extra widgets */
		dropDownButton = new Button(styleGroup, SWT.RADIO);
		dropDownButton.setText("SWT.DROP_DOWN");
		simpleButton = new Button(styleGroup, SWT.RADIO);
		simpleButton.setText("SWT.SIMPLE");
		readOnlyButton = new Button(styleGroup, SWT.CHECK);
		readOnlyButton.setText("SWT.READ_ONLY");
	}

	/**
	 * Creates the tab folder page.
	 * 
	 * @param tabFolder
	 *            org.eclipse.swt.widgets.TabFolder
	 * @return the new page for the tab folder
	 */
	Composite createTabFolderPage(TabFolder tabFolder) {
		super.createTabFolderPage(tabFolder);

		/*
		 * Add a resize listener to the tabFolderPage so that if the user types into the example widget to change its
		 * preferred size, and then resizes the shell, we recalculate the preferred size correctly.
		 */
		tabFolderPage.addControlListener(new ControlAdapter() {
			public void controlResized(ControlEvent e) {
				setExampleWidgetSize();
			}
		});

		return tabFolderPage;
	}

	/**
	 * Gets the "Example" widget children.
	 */
	Widget[] getExampleWidgets() {
		return new Widget[] { combo1 };
	}

	/**
	 * Returns a list of set/get API method names (without the set/get prefix) that can be used to set/get values in the
	 * example control(s).
	 */
	String[] getMethodNames() {
		return new String[] { "Items", "Orientation", "Selection", "Text", "TextLimit", "ToolTipText",
				"VisibleItemCount" };
	}

	/**
	 * Gets the text for the tab folder item.
	 */
	String getTabText() {
		return "Combo";
	}

	/**
	 * Sets the state of the "Example" widgets.
	 */
	void setExampleWidgetState() {
		super.setExampleWidgetState();
		dropDownButton.setSelection((combo1.getStyle() & SWT.DROP_DOWN) != 0);
		simpleButton.setSelection((combo1.getStyle() & SWT.SIMPLE) != 0);
		readOnlyButton.setSelection((combo1.getStyle() & SWT.READ_ONLY) != 0);
		readOnlyButton.setEnabled(!simpleButton.getSelection());
	}
}