org.simantics.district.network.ui/src/org/simantics/district/network/ui/contributions/SetFocusableDynamicMenuContribution.java

   1 package org.simantics.district.network.ui.contributions;
   2
   3 import java.awt.geom.Point2D;
   4 import java.util.ArrayList;
   5 import java.util.List;
   6
   7 import javax.inject.Named;
   8
   9 import org.eclipse.e4.core.contexts.IEclipseContext;
  10 import org.eclipse.e4.ui.di.AboutToHide;
  11 import org.eclipse.e4.ui.di.AboutToShow;
  12 import org.eclipse.e4.ui.model.application.ui.basic.MPart;
  13 import org.eclipse.e4.ui.model.application.ui.menu.MHandledMenuItem;
  14 import org.eclipse.e4.ui.model.application.ui.menu.MMenuElement;
  15 import org.eclipse.e4.ui.model.application.ui.menu.MMenuFactory;
  16 import org.eclipse.e4.ui.services.IServiceConstants;
  17 import org.eclipse.jface.viewers.ISelection;
  18 import org.eclipse.ui.IEditorPart;
  19 import org.simantics.g2d.canvas.ICanvasContext;
  20 import org.simantics.g2d.diagram.DiagramHints;
  21 import org.simantics.g2d.diagram.IDiagram;
  22 import org.simantics.g2d.diagram.handler.PickContext;
  23 import org.simantics.g2d.diagram.handler.PickRequest;
  24 import org.simantics.g2d.element.IElement;
  25 import org.simantics.g2d.element.handler.ElementLayers;
  26 import org.simantics.g2d.layers.ILayer;
  27 import org.simantics.g2d.layers.ILayersEditor;
  28 import org.simantics.ui.workbench.e4.E4WorkbenchUtils;
  29
  30 public class SetFocusableDynamicMenuContribution {
  31
  32     public static final String SET_FOCUSABLE_ID = "org.simantics.district.network.ui.setFocusable";
  33     public static final String FOCUSABLE_ELEMENTS = "org.simantics.district.network.ui.focusableElements";
  34
  35     @AboutToShow
  36     public void aboutToShow(IEclipseContext popupContext, @Named(IServiceConstants.ACTIVE_SELECTION) ISelection selection, List<MMenuElement> items, @Named(IServiceConstants.ACTIVE_PART) MPart part) {
  37
  38         IEditorPart editorPart = E4WorkbenchUtils.getActiveIEditorPart(part);
  39         IDiagram diagram = editorPart.getAdapter(IDiagram.class);
  40         if (diagram == null)
  41             return;
  42
  43         PickContext pick = diagram.getDiagramClass().getSingleItem(PickContext.class);
  44         if (pick == null)
  45             return;
  46
  47         ICanvasContext ctx = (ICanvasContext) editorPart.getAdapter(ICanvasContext.class);
  48         if (ctx == null)
  49             return;
  50
  51         Point2D canvasPosition = ctx.getHintStack().getHint(DiagramHints.POPUP_MENU_CANVAS_POSITION);
  52         if (canvasPosition == null)
  53             return;
  54
  55         List<IElement> result = new ArrayList<>();
  56
  57         ILayersEditor le = diagram.getHint(DiagramHints.KEY_LAYERS_EDITOR);
  58         // Quite hackish solution..
  59         boolean oldIgnore = le.getIgnoreFocusSettings();
  60         le.setIgnoreFocusSettings(true);
  61         pick.pick(diagram, new PickRequest(canvasPosition.getX(), canvasPosition.getY()), result);
  62         le.setIgnoreFocusSettings(oldIgnore);
  63
  64         boolean allow = false;
  65
  66         for (IElement elem : result) {
  67             ElementLayers el = elem.getElementClass().getAtMostOneItemOfClass(ElementLayers.class);
  68             for (ILayer layer : le.getVisibleLayers()) {
  69                 boolean focusable = el.isFocusable(elem, layer);
  70                 if (!focusable)
  71                     allow = true;
  72             }
  73         }
  74
  75         MHandledMenuItem dynamicItem = MMenuFactory.INSTANCE.createHandledMenuItem();
  76         if (allow)
  77             dynamicItem.setLabel("Allow focusing");
  78         else
  79             dynamicItem.setLabel("Disallow focusing");
  80
  81         dynamicItem.setContributorURI("platform:/plugin/org.simantics.district.network.ui");
  82         dynamicItem.setIconURI("platform:/plugin/org.simantics.modeling.ui/icons/shape_handles.png");
  83         dynamicItem.setCommand(E4WorkbenchUtils.getMCommandById(SET_FOCUSABLE_ID));
  84         items.add(dynamicItem);
  85
  86         popupContext.set(FOCUSABLE_ELEMENTS, result);
  87     }
  88
  89     @AboutToHide
  90     public void aboutToHide(IEclipseContext popupContext) {
  91         popupContext.remove(FOCUSABLE_ELEMENTS);
  92     }
  93 }