bundles/org.simantics.charts/src/org/simantics/charts/ui/LinkTimeHandler.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2011 Association for Decentralized Information Management in
   3  * Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.charts.ui;
  13
  14 import java.util.Map;
  15
  16 import org.eclipse.core.commands.AbstractHandler;
  17 import org.eclipse.core.commands.Command;
  18 import org.eclipse.core.commands.ExecutionEvent;
  19 import org.eclipse.core.commands.ExecutionException;
  20 import org.eclipse.core.commands.IHandler;
  21 import org.eclipse.core.commands.State;
  22 import org.eclipse.ui.IEditorPart;
  23 import org.eclipse.ui.IEditorReference;
  24 import org.eclipse.ui.IWorkbenchPage;
  25 import org.eclipse.ui.IWorkbenchPart;
  26 import org.eclipse.ui.IWorkbenchWindow;
  27 import org.eclipse.ui.PlatformUI;
  28 import org.eclipse.ui.commands.ICommandService;
  29 import org.eclipse.ui.commands.IElementUpdater;
  30 import org.eclipse.ui.handlers.HandlerUtil;
  31 import org.eclipse.ui.menus.UIElement;
  32 import org.simantics.charts.editor.TimeSeriesEditor;
  33
  34 public class LinkTimeHandler extends AbstractHandler implements IHandler, IElementUpdater {
  35
  36     public static final String COMMAND_ID = "org.simantics.charts.linktime";
  37     public static final String STATE_ID = "org.simantics.charts.linktime.state";
  38
  39     @Override
  40     public Object execute(ExecutionEvent event) throws ExecutionException {
  41         ICommandService service = (ICommandService) PlatformUI.getWorkbench().getService(ICommandService.class);
  42         Command command = service.getCommand( COMMAND_ID );
  43         State state = command.getState( STATE_ID );
  44         if (state != null) {
  45             ChartLinkData oldData = (ChartLinkData) state.getValue();
  46             if (oldData == null) {
  47                 TimeSeriesEditor editor = getEditor( event );
  48                 ChartLinkData currentData = new ChartLinkData();
  49                 if (editor != null) {
  50                     editor.getFromEnd(currentData);
  51                 }
  52                 state.setValue( currentData );
  53             } else {
  54                 state.setValue(null);
  55             }
  56         }
  57
  58         service.refreshElements(COMMAND_ID, null);
  59         return null;
  60     }
  61
  62     /**
  63      * Get active editor or first one
  64      * @return
  65      */
  66     TimeSeriesEditor getEditor(ExecutionEvent event) {
  67         IWorkbenchPart ap = HandlerUtil.getActivePart(event);
  68         if ( ap instanceof TimeSeriesEditor ) return (TimeSeriesEditor) ap;
  69
  70         IWorkbenchWindow win = HandlerUtil.getActiveWorkbenchWindow(event);
  71         if (win==null) return null;
  72         for (IWorkbenchPage page : win.getPages()) {
  73             for (IEditorReference ref : page.getEditorReferences()) {
  74                 if (ref.getId().equals(TimeSeriesEditor.ID)) {
  75                     IEditorPart part = ref.getEditor(false);
  76                     return (TimeSeriesEditor) part;
  77                 }
  78             }
  79         }
  80
  81         return null;
  82     }
  83
  84     @Override
  85     public void updateElement(UIElement element, @SuppressWarnings("rawtypes") Map parameters) {
  86         ICommandService service = (ICommandService) PlatformUI.getWorkbench().getService(ICommandService.class);
  87         Command command = service.getCommand( COMMAND_ID );
  88         State state = command.getState( STATE_ID );
  89         element.setChecked( state != null && state.getValue()!=null );
  90     }
  91
  92 }