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

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