1 files changed, 218 insertions, 0 deletions
diff --git a/plugins/customization/org.eclipse.papyrus.customization.properties.generation/src/org/eclipse/papyrus/customization/properties/generation/wizard/widget/TernaryButton.java b/plugins/customization/org.eclipse.papyrus.customization.properties.generation/src/org/eclipse/papyrus/customization/properties/generation/wizard/widget/TernaryButton.java
new file mode 100644
index 00000000000..dc76fb2fb60
--- /dev/null
+++ b/plugins/customization/org.eclipse.papyrus.customization.properties.generation/src/org/eclipse/papyrus/customization/properties/generation/wizard/widget/TernaryButton.java
@@ -0,0 +1,218 @@
+/*****************************************************************************
+ * Copyright (c) 2010 CEA LIST.
+ *    
+ * 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:
+ *  Camille Letavernier (CEA LIST) camille.letavernier@cea.fr - Initial API and implementation
+ *****************************************************************************/
+package org.eclipse.papyrus.customization.properties.generation.wizard.widget;
+
+import org.eclipse.core.databinding.observable.value.IObservableValue;
+import org.eclipse.papyrus.customization.properties.generation.Activator;
+import org.eclipse.papyrus.customization.properties.generation.messages.Messages;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.events.SelectionEvent;
+import org.eclipse.swt.events.SelectionListener;
+import org.eclipse.swt.graphics.Image;
+import org.eclipse.swt.layout.FillLayout;
+import org.eclipse.swt.widgets.Button;
+import org.eclipse.swt.widgets.Composite;
+
+/**
+ * A 3-choices button. The three possible values are "True", "False" or "Default".
+ * When the choice is "Default", it can be either "Default (True)" or "Default (False)",
+ * depending on the default value assignated to the button.
+ * 
+ * @see State
+ * 
+ * @author Camille Letavernier
+ * 
+ */
+public class TernaryButton extends Composite implements SelectionListener {
+
+	private State state;
+
+	private Button button;
+
+	private boolean defaultValue;
+
+	private IObservableValue observable;
+
+	/**
+	 * 
+	 * Constructor.
+	 * 
+	 * @param parent
+	 *        The parent in which the button is created
+	 * @param defaultValue
+	 *        The value returned when the "default" value is selected
+	 */
+	public TernaryButton(Composite parent, boolean defaultValue) {
+		super(parent, SWT.NONE);
+		button = new Button(this, SWT.PUSH);
+		setLayout(new FillLayout());
+		button.addSelectionListener(this);
+		this.defaultValue = defaultValue;
+		setState(State.DEFAULT);
+	}
+
+	public void widgetSelected(SelectionEvent e) {
+		switch(state) {
+		case DEFAULT:
+			setState(State.TRUE);
+			break;
+		case TRUE:
+			setState(State.FALSE);
+			break;
+		case FALSE:
+			setState(State.DEFAULT);
+			break;
+		}
+
+		observable.setValue(getState());
+	}
+
+	/**
+	 * Sets the ObservableValue binded to this widget. The databinding
+	 * is only one-way : modifications on the Observable value won't be
+	 * reflected on the widget.
+	 * 
+	 * @param value
+	 *        The Observable value to link to this widget
+	 */
+	public void setObservable(IObservableValue value) {
+		this.observable = value;
+	}
+
+	/**
+	 * Change this button's value
+	 * 
+	 * @param state
+	 *        The new button's state
+	 */
+	public void setState(State state) {
+		this.state = state;
+		button.setImage(state.getImage(defaultValue));
+		button.setText(state.getText(defaultValue));
+	}
+
+	/**
+	 * @return the button's state
+	 */
+	public State getState() {
+		return state;
+	}
+
+	/**
+	 * @return the boolean value of this button. If the State is Default, then
+	 *         the button's default value will be returned.
+	 */
+	public boolean getValue() {
+		return state.getValue(defaultValue);
+	}
+
+	public void widgetDefaultSelected(SelectionEvent e) {
+		//Nothing
+	}
+
+	/**
+	 * An enum representing the three possible states of the button :
+	 * DEFAULT, TRUE, FALSE
+	 * 
+	 * @author Camille Letavernier
+	 * 
+	 */
+	public enum State {
+		/**
+		 * The default value. The Button is responsible for providing
+		 * a default value for this case (Either true or false)
+		 */
+		DEFAULT,
+		/**
+		 * The boolean True value
+		 */
+		TRUE,
+		/**
+		 * The boolean False value
+		 */
+		FALSE;
+
+		/**
+		 * @param defaultValue
+		 *        The value to return if the state is "Default"
+		 * @return the boolean value of this button. If the State is Default, then
+		 *         the default value will be returned.
+		 */
+		public boolean getValue(boolean defaultValue) {
+			switch(this) {
+			case DEFAULT:
+				return defaultValue;
+			case TRUE:
+				return true;
+			case FALSE:
+				return false;
+			}
+
+			//Cannot happen as the switch is exhaustive
+			throw new RuntimeException();
+		}
+
+		/**
+		 * Return the image corresponding to the current state. If the state
+		 * is "Default", the image will depend on the given defaultValue
+		 * 
+		 * @param defaultValue
+		 *        The value to use if the State is "Default"
+		 * @return
+		 *         The image corresponding to the current State
+		 */
+		public Image getImage(boolean defaultValue) {
+			switch(this) {
+			case DEFAULT:
+				if(defaultValue) {
+					return Activator.getDefault().getImage("/icons/default_true.gif"); //$NON-NLS-1$
+				} else {
+					return Activator.getDefault().getImage("/icons/default_false.gif"); //$NON-NLS-1$
+				}
+			case TRUE:
+				return Activator.getDefault().getImage("/icons/true.gif"); //$NON-NLS-1$
+			case FALSE:
+				return Activator.getDefault().getImage("/icons/false.gif"); //$NON-NLS-1$
+			}
+
+			//Cannot happen as the switch is exhaustive
+			throw new RuntimeException();
+		}
+
+		/**
+		 * Return the text corresponding to the current state. If the state
+		 * is "Default", the text will depend on the given defaultValue
+		 * 
+		 * @param defaultValue
+		 *        The value to use if the State is "Default"
+		 * @return
+		 *         The text corresponding to the current State
+		 */
+		public String getText(boolean defaultValue) {
+			switch(this) {
+			case DEFAULT:
+				if(defaultValue) {
+					return Messages.TernaryButton_defaultTrue;
+				} else {
+					return Messages.TernaryButton_defaultFalse;
+				}
+			case TRUE:
+				return Messages.TernaryButton_true;
+			case FALSE:
+				return Messages.TernaryButton_false;
+			}
+
+			//Cannot happen as the switch is exhaustive
+			throw new RuntimeException();
+		}
+	}
+}