UI for diagram element selection

[simantics/district.git] / org.simantics.district.selection.ui / src / org / simantics / district / selection / ui / handlers / DeleteElementSelector.java

diff --git a/org.simantics.district.selection.ui/src/org/simantics/district/selection/ui/handlers/DeleteElementSelector.java b/org.simantics.district.selection.ui/src/org/simantics/district/selection/ui/handlers/DeleteElementSelector.java
new file mode 100644 (file)
index 0000000..4382e70
--- /dev/null
+++ b/org.simantics.district.selection.ui/src/org/simantics/district/selection/ui/handlers/DeleteElementSelector.java
@@ -0,0 +1,64 @@
+package org.simantics.district.selection.ui.handlers;
+
+import javax.inject.Inject;
+
+import org.eclipse.e4.core.contexts.IEclipseContext;
+import org.eclipse.e4.core.di.annotations.CanExecute;
+import org.eclipse.e4.core.di.annotations.Execute;
+import org.eclipse.e4.ui.model.application.ui.basic.MPart;
+import org.eclipse.e4.ui.workbench.IWorkbench;
+import org.eclipse.e4.ui.workbench.modeling.EPartService;
+import org.eclipse.e4.ui.workbench.modeling.ESelectionService;
+import org.simantics.Simantics;
+import org.simantics.db.WriteGraph;
+import org.simantics.db.common.request.WriteRequest;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.district.selection.ElementSelector;
+import org.simantics.district.selection.ui.parts.ElementSelectionView;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class DeleteElementSelector {
+
+       private static final Logger LOGGER = LoggerFactory.getLogger(DeleteElementSelector.class);
+
+       @Inject
+       EPartService partService;
+       
+       @CanExecute
+       public boolean canExecute(ESelectionService selectionService) {
+               MPart part = partService.getActivePart();
+               if (part == null) return false;
+               
+               Object object = part.getObject();
+               if (object == null || !(object instanceof ElementSelectionView))
+                       return false;
+               
+               ElementSelectionView view = (ElementSelectionView)object;
+               return view.getSelectedItem() != null;
+       }
+
+       @Execute
+       public void editElementSelector(IEclipseContext context, IWorkbench workbench) {
+               MPart part = partService.getActivePart();
+               if (part == null) return;
+               
+               Object object = part.getObject();
+               if (object == null || !(object instanceof ElementSelectionView))
+                       return;
+               
+               ElementSelectionView view = (ElementSelectionView)object;
+               ElementSelector selectedItem = view.getSelectedItem();
+               
+               if (selectedItem == null)
+                       return;
+               
+               Simantics.getSession().async(new WriteRequest() {
+                       @Override
+                       public void perform(WriteGraph graph) throws DatabaseException {
+                               graph.markUndoPoint();
+                               graph.deny(selectedItem.getResource());
+                       }
+               });
+       }
+}