Case Study: adding data and statistics

[ifi-stolz-refaktor.git] / case-study / jdt-before / ui / org / eclipse / jdt / internal / ui / actions / MultiActionGroup.java

diff --git a/case-study/jdt-before/ui/org/eclipse/jdt/internal/ui/actions/MultiActionGroup.java b/case-study/jdt-before/ui/org/eclipse/jdt/internal/ui/actions/MultiActionGroup.java
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+/*******************************************************************************
+ * Copyright (c) 2000, 2011 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.jdt.internal.ui.actions;
+
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.events.SelectionAdapter;
+import org.eclipse.swt.events.SelectionEvent;
+import org.eclipse.swt.widgets.Menu;
+import org.eclipse.swt.widgets.MenuItem;
+
+import org.eclipse.jface.action.ContributionItem;
+import org.eclipse.jface.action.IAction;
+import org.eclipse.jface.action.IMenuManager;
+import org.eclipse.jface.action.Separator;
+import org.eclipse.jface.resource.ImageDescriptor;
+
+import org.eclipse.ui.actions.ActionGroup;
+
+import org.eclipse.jdt.internal.ui.JavaPlugin;
+
+/**
+ * A MultiActionGroup will display a list of IActions in a menu by transforming them
+ * into MenuItems. The list of labels given will be what is displayed in the ViewMenu for
+ * the corresponding action (the action at the same position in the action array).
+ * The actions are currently implemented as state based
+ * so that after an action is executed the label will have a selection check.
+ *
+ * @since 2.1
+ */
+public class MultiActionGroup extends ActionGroup {
+
+       public IAction[] NO_ACTIONS = new IAction[0];
+
+       private IAction[] fActions;
+
+       private int fCurrentSelection;
+       private MenuItem[] fItems;
+
+       /**
+        * Creates a new action group with a given set of actions.
+        *
+        * @param actions                       the actions for this multi group
+        * @param currentSelection      decides which action is selected in the menu on start up.
+        *                                                      Denotes the location in the actions array of the current
+        *                                                      selected state. It cannot be null.
+        */
+       public MultiActionGroup(IAction[] actions, int currentSelection) {
+               super();
+               setActions(actions, currentSelection);
+       }
+
+       /**
+        * Creates a new action group. Clients using this constructor must set the actions
+        * immediately after creating the multi action group by calling {@link #setActions(IAction[], int)}.
+        */
+       protected MultiActionGroup() {
+               super();
+       }
+
+       /**
+        * Sets the given actions.
+        *
+        * @param actions                       the actions for this multi group, at least one
+        * @param currentSelection      decides which action is selected in the menu on start up.
+        *                                                      Denotes the location in the actions array of the current
+        *                                                      selected state. It cannot be null.
+        */
+       protected final void setActions(IAction[] actions, int currentSelection) {
+               fCurrentSelection= currentSelection;
+               fActions = actions;
+       }
+
+       /**
+        * Adds the actions to the given menu manager.
+        */
+       protected void addActions(IMenuManager viewMenu) {
+
+               viewMenu.add(new Separator());
+               fItems= new MenuItem[fActions.length];
+
+               for (int i= 0; i < fActions.length; i++) {
+                       final int j= i;
+
+                       viewMenu.add(new ContributionItem() {
+
+                               @Override
+                               public void fill(Menu menu, int index) {
+
+                                       int style= SWT.CHECK;
+                                       if ((fActions[j].getStyle() & IAction.AS_RADIO_BUTTON) != 0)
+                                               style= SWT.RADIO;
+
+                                       MenuItem mi= new MenuItem(menu, style, index);
+                                       ImageDescriptor d= fActions[j].getImageDescriptor();
+                                       mi.setImage(JavaPlugin.getImageDescriptorRegistry().get(d));
+                                       fItems[j]= mi;
+                                       mi.setText(fActions[j].getText());
+                                       mi.setSelection(fCurrentSelection == j);
+                                       mi.addSelectionListener(new SelectionAdapter() {
+
+                                               @Override
+                                               public void widgetSelected(SelectionEvent e) {
+                                                       if (fCurrentSelection == j) {
+                                                               fItems[fCurrentSelection].setSelection(true);
+                                                               return;
+                                                       }
+                                                       fActions[j].run();
+
+                                                       // Update checked state
+                                                       fItems[fCurrentSelection].setSelection(false);
+                                                       fCurrentSelection= j;
+                                                       fItems[fCurrentSelection].setSelection(true);
+                                               }
+
+                                       });
+                               }
+                               @Override
+                               public boolean isDynamic() {
+                                       return false;
+                               }
+                       });
+               }
+       }
+}