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DND controls examples
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‎com.vogella.eclipse.dndcontrols/com.vogella.eclipse.dndcontrols.product‎

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<plugin id="org.apache.batik.util.gui"/>
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<plugin id="org.apache.commons.jxpath"/>
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<plugin id="org.apache.commons.logging"/>
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<plugin id="org.apache.felix.gogo.command"/>
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<plugin id="org.apache.felix.gogo.runtime"/>
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<plugin id="org.apache.felix.scr"/>
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<plugin id="org.eclipse.core.commands"/>
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<plugin id="org.eclipse.core.contenttype"/>
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<plugin id="org.eclipse.core.databinding"/>
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<plugin id="org.eclipse.e4.core.di"/>
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<plugin id="org.eclipse.e4.core.di.annotations"/>
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<plugin id="org.eclipse.e4.core.di.extensions"/>
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<plugin id="org.eclipse.e4.core.di.extensions.supplier"/>
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<plugin id="org.eclipse.e4.core.services"/>
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<plugin id="org.eclipse.e4.emf.xpath"/>
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<plugin id="org.eclipse.e4.ui.bindings"/>
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<plugin id="org.eclipse.osgi"/>
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<plugin id="org.eclipse.osgi.compatibility.state" fragment="true"/>
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<plugin id="org.eclipse.osgi.services"/>
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<plugin id="org.eclipse.osgi.util"/>
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<plugin id="org.eclipse.swt"/>
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<plugin id="org.eclipse.swt.cocoa.macosx.x86_64" fragment="true"/>
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<plugin id="org.eclipse.swt.gtk.linux.ppc" fragment="true"/>

‎com.vogella.swt.widgets/META-INF/MANIFEST.MF‎

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@@ -5,4 +5,6 @@ Bundle-SymbolicName: com.vogella.swt.widgets
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Bundle-Version: 1.0.0.qualifier
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Bundle-Vendor: VOGELLA
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Bundle-RequiredExecutionEnvironment: JavaSE-1.8
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Require-Bundle: org.eclipse.swt;bundle-version="3.106.0"
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Require-Bundle: org.eclipse.swt;bundle-version="3.106.0",
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org.eclipse.core.runtime;bundle-version="3.13.0",
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org.eclipse.jface;bundle-version="3.13.0"

‎com.vogella.swt.widgets/images/ic_action_cake.png‎

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‎com.vogella.swt.widgets/images/ic_action_clock.png‎

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‎com.vogella.swt.widgets/images/ic_action_smiley.png‎

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‎com.vogella.swt.widgets/images/ic_action_star.png‎

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‎com.vogella.swt.widgets/src/com/vogella/swt/widgets/customwidgets/LayeredComposite.java‎

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package com.vogella.swt.widgets.customwidgets;
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import org.eclipse.swt.SWT;
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import org.eclipse.swt.graphics.Color;
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import org.eclipse.swt.layout.FillLayout;
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import org.eclipse.swt.layout.FormAttachment;
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import org.eclipse.swt.layout.FormData;
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import org.eclipse.swt.layout.FormLayout;
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import org.eclipse.swt.widgets.Composite;
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/**
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* Instances of this class represent a composite with two layers
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*
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* The layers can contain arbitrary layouts and widgets
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* <p>
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*
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* <ul>
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* <li>{@link #getContentComposite()} allows to retrieve the Composite for the
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* main content</li>
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* <li>{@link #getOverlayComposite()} Retrieve the Composite for the
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* overlay</li>
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* </ul>
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*
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* </p>
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* <dl>
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* <dt><b>Styles:</b></dt>
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* <dd>TOP, BOTTOM, LEFT, RIGHT</dd>
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* </dl>
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* <p>
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* Note: Only one of the styles TOP, BOTTOM, RIGHT, and CENTER may be specified.
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* </p>
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* <p>
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* </p>
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*
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* @noextend This class is not intended to be subclassed by clients.
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*/
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public class LayeredComposite extends Composite {
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private Color backgroundColor;
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private Composite mainContentArea;
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private Composite overlayComposite;
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public LayeredComposite(Composite parent, int style) {
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super(parent, style);
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// Uncommend to test if the clients are fill the full area
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// backgroundColor = new Color(null, 255, 0, 0);
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// setBackground(backgroundColor);
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// this.addDisposeListener(e -> {
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// backgroundColor.dispose();
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// });
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FormLayout formLayout = new FormLayout();
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this.setLayout(formLayout);
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mainContentArea = new Composite(this, SWT.NONE);
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mainContentArea.setLayout(new FillLayout());
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mainContentArea.setLayoutData(fillCompleteArea());
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overlayComposite = new Composite(this, SWT.NONE);
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overlayComposite.setLayout(new FillLayout());
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overlayComposite.moveAbove(null);
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FormData formDataUpperLayer = definePosition(style);
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overlayComposite.setLayoutData(formDataUpperLayer);
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}
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/**
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* Retrieve the main Composite. Content of this composite maybe overlayed by
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* the overlayComposite
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*
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* @return Composite the Composite that represents the main content
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*/
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public Composite getContentComposite() {
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return mainContentArea;
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}
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/**
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* Retrieve the overlay Composite.
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*
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* @return Composite the Composite that represents the main content
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*/
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public Composite getOverlayComposite() {
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return overlayComposite;
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}
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private FormData definePosition(int style) {
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checkStyle(style);
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FormData formDataUpperLayer = new FormData();
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if (style == SWT.BOTTOM) {
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formDataUpperLayer.bottom = new FormAttachment(100, 0);
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formDataUpperLayer.left = new FormAttachment(0, 0);
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formDataUpperLayer.right = new FormAttachment(100, 0);
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} else if (style == SWT.TOP) {
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formDataUpperLayer.top = new FormAttachment(0, 0);
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formDataUpperLayer.left = new FormAttachment(0, 0);
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formDataUpperLayer.right = new FormAttachment(100, 0);
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} else if (style == SWT.RIGHT) {
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formDataUpperLayer.top = new FormAttachment(0, 0);
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formDataUpperLayer.right = new FormAttachment(100, 0);
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} else if (style == SWT.LEFT) {
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formDataUpperLayer.top = new FormAttachment(0, 0);
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formDataUpperLayer.left = new FormAttachment(0, 0);
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formDataUpperLayer.right = new FormAttachment(100, 0);
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}
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return formDataUpperLayer;
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}
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/**
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* Ensure that only valid styles are passed to the container
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*
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* @param style
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*/
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static void checkStyle(int style) {
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if ((style & (SWT.BOTTOM | SWT.TOP | SWT.RIGHT | SWT.LEFT)) == 0) {
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throw new IllegalArgumentException("Style must be one of SWT.BOTTOM, SWT.TOP, SWT.RIGHT, SWT.LEFT");
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}
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}
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private FormData fillCompleteArea() {
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FormData formData = new FormData();
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formData.top = new FormAttachment(0, 0);
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formData.bottom = new FormAttachment(100, 0);
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formData.left = new FormAttachment(0, 0);
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formData.right = new FormAttachment(100, 0);
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return formData;
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}
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}

‎com.vogella.swt.widgets/src/com/vogella/swt/widgets/customwidgets/PictureLabel.java‎

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package com.vogella.swt.widgets.customwidgets;
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import org.eclipse.swt.graphics.Color;
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import org.eclipse.swt.widgets.Canvas;
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import org.eclipse.swt.widgets.Composite;
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public class PictureLabel extends Canvas {
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private Color white;
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PictureLabel(Composite parent, int style) {
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super(parent, style);
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white = new Color(null, 255, 255, 255);
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setBackground(white);
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}
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}

‎com.vogella.swt.widgets/src/com/vogella/swt/widgets/customwidgets/TestLayeredComposite.java‎

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package com.vogella.swt.widgets.customwidgets;
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import org.eclipse.swt.SWT;
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import org.eclipse.swt.layout.FillLayout;
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import org.eclipse.swt.layout.GridLayout;
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import org.eclipse.swt.widgets.Button;
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import org.eclipse.swt.widgets.Composite;
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import org.eclipse.swt.widgets.Display;
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import org.eclipse.swt.widgets.Shell;
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public class TestLayeredComposite {
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public static void main(String[] args) {
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Display display = new Display();
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Shell shell = new Shell(display);
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FillLayout layout = new FillLayout();
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layout.marginHeight = 0;
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layout.marginWidth = 0;
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shell.setLayout(layout);
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LayeredComposite composite = new LayeredComposite(shell, SWT.BOTTOM);
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// Build the main area of the user interface
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Composite mainComposite = new Composite(composite.getContentComposite(), SWT.NONE);
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mainComposite.setLayout(new GridLayout(1, false));
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for (int i = 0; i < 20; i++) {
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Button button = new Button(mainComposite, SWT.CHECK);
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button.setText("Testing " + i);
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}
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// Build the top layer of the user interface
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Composite layeredComposite = new Composite(composite.getOverlayComposite(), SWT.NONE);
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layeredComposite.setLayout(new GridLayout(1, true));
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for (int i = 0; i < 3; i++) {
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Button button = new Button(layeredComposite, SWT.PUSH);
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button.setText("Control Center" + i);
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}
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shell.setSize(800, 300);
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shell.open();
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while (!shell.isDisposed()) {
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if (!display.readAndDispatch()) {
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display.sleep();
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}
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}
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}
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}

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