org.eclipse.swt.examples.controlexample.ComboTab.java Source code

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Here is the source code for org.eclipse.swt.examples.controlexample.ComboTab.java

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/*******************************************************************************
 * Copyright (c) 2000, 2017 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.examples.controlexample;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ControlListener;
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 {

    /* Example widgets and groups that contain them */
    Combo combo1;
    Group comboGroup;

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

    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") };

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

    /**
     * Creates the "Example" group.
     */
    @Override
    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.
     */
    @Override
    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(ListData);
        if (ListData.length >= 3) {
            combo1.setText(ListData[2]);
        }
    }

    /**
     * Creates the tab folder page.
     *
     * @param tabFolder org.eclipse.swt.widgets.TabFolder
     * @return the new page for the tab folder
     */
    @Override
    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(ControlListener.controlResizedAdapter(e -> setExampleWidgetSize()));

        return tabFolderPage;
    }

    /**
     * Creates the "Style" group.
     */
    @Override
    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");
    }

    /**
     * Gets the "Example" widget children.
     */
    @Override
    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).
     */
    @Override
    String[] getMethodNames() {
        return new String[] { "Items", "Orientation", "Selection", "Text", "TextLimit", "ToolTipText",
                "VisibleItemCount" };
    }

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

    /**
     * Sets the state of the "Example" widgets.
     */
    @Override
    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());
    }
}