org.eclipse.swt.snippets.Snippet336.java Source code

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Here is the source code for org.eclipse.swt.snippets.Snippet336.java

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/*******************************************************************************
 * Copyright (c) 2000, 2016 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.snippets;

/*
 * Taskbar snippet: customize the taskbar item with progress indicator, overlay image, and overlay text
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 */
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

public class Snippet336 {
    static Display display;
    static Shell shell;

    static TaskItem getTaskBarItem() {
        TaskBar bar = display.getSystemTaskBar();
        if (bar == null)
            return null;
        TaskItem item = bar.getItem(shell);
        if (item == null)
            item = bar.getItem(null);
        return item;
    }

    public static void main(String[] args) {
        display = new Display();
        shell = new Shell(display);
        shell.setText("Snippet 336");
        shell.setLayout(new GridLayout());
        TabFolder folder = new TabFolder(shell, SWT.NONE);
        folder.setLayoutData(new GridData(GridData.FILL_BOTH));

        //Progress tab
        TabItem item = new TabItem(folder, SWT.NONE);
        item.setText("Progress");
        Composite composite = new Composite(folder, SWT.NONE);
        composite.setLayout(new GridLayout());
        item.setControl(composite);
        Listener listener = event -> {
            Button button = (Button) event.widget;
            if (!button.getSelection())
                return;
            TaskItem item1 = getTaskBarItem();
            if (item1 != null) {
                int state = ((Integer) button.getData()).intValue();
                item1.setProgressState(state);
            }
        };
        Group group = new Group(composite, SWT.NONE);
        group.setText("State");
        group.setLayout(new GridLayout());
        group.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
        Button button;
        String[] stateLabels = { "SWT.DEFAULT", "SWT.INDETERMINATE", "SWT.NORMAL", "SWT.ERROR", "SWT.PAUSED" };
        int[] states = { SWT.DEFAULT, SWT.INDETERMINATE, SWT.NORMAL, SWT.ERROR, SWT.PAUSED };
        for (int i = 0; i < states.length; i++) {
            button = new Button(group, SWT.RADIO);
            button.setText(stateLabels[i]);
            button.setData(Integer.valueOf(states[i]));
            button.addListener(SWT.Selection, listener);
            if (i == 0)
                button.setSelection(true);
        }
        group = new Group(composite, SWT.NONE);
        group.setText("Value");
        group.setLayout(new GridLayout(2, false));
        group.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
        Label label = new Label(group, SWT.NONE);
        label.setText("Progress");
        final Scale scale = new Scale(group, SWT.NONE);
        scale.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
        scale.addListener(SWT.Selection, event -> {
            TaskItem item1 = getTaskBarItem();
            if (item1 != null)
                item1.setProgress(scale.getSelection());
        });

        //Overlay text tab
        item = new TabItem(folder, SWT.NONE);
        item.setText("Text");
        composite = new Composite(folder, SWT.NONE);
        composite.setLayout(new GridLayout());
        item.setControl(composite);
        group = new Group(composite, SWT.NONE);
        group.setText("Enter a short text:");
        group.setLayout(new GridLayout(2, false));
        group.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
        final Text text = new Text(group, SWT.BORDER | SWT.SINGLE);
        GridData data = new GridData(GridData.FILL_HORIZONTAL);
        data.horizontalSpan = 2;
        text.setLayoutData(data);
        button = new Button(group, SWT.PUSH);
        button.setText("Set");
        button.addListener(SWT.Selection, event -> {
            TaskItem item1 = getTaskBarItem();
            if (item1 != null)
                item1.setOverlayText(text.getText());
        });
        button = new Button(group, SWT.PUSH);
        button.setText("Clear");
        button.addListener(SWT.Selection, event -> {
            text.setText("");
            TaskItem item1 = getTaskBarItem();
            if (item1 != null)
                item1.setOverlayText("");
        });

        //Overlay image tab
        item = new TabItem(folder, SWT.NONE);
        item.setText("Image");
        composite = new Composite(folder, SWT.NONE);
        composite.setLayout(new GridLayout());
        item.setControl(composite);
        Listener listener3 = event -> {
            Button button1 = (Button) event.widget;
            if (!button1.getSelection())
                return;
            TaskItem item1 = getTaskBarItem();
            if (item1 != null) {
                String text1 = button1.getText();
                Image image = null;
                if (!text1.equals("NONE"))
                    image = new Image(display, Snippet336.class.getResourceAsStream(text1));
                Image oldImage = item1.getOverlayImage();
                item1.setOverlayImage(image);
                if (oldImage != null)
                    oldImage.dispose();
            }
        };
        group = new Group(composite, SWT.NONE);
        group.setText("Images");
        group.setLayout(new GridLayout());
        group.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
        button = new Button(group, SWT.RADIO);
        button.setText("NONE");
        button.addListener(SWT.Selection, listener3);
        button.setSelection(true);
        String[] images = { "eclipse.png", "pause.gif", "run.gif", "warning.gif" };
        for (int i = 0; i < images.length; i++) {
            button = new Button(group, SWT.RADIO);
            button.setText(images[i]);
            button.addListener(SWT.Selection, listener3);
        }
        shell.pack();
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        display.dispose();
    }

}