diff options
| author | Andrew Branson <andrew.branson@cern.ch> | 2012-06-26 12:41:11 +0200 |
|---|---|---|
| committer | Andrew Branson <andrew.branson@cern.ch> | 2012-06-26 12:41:11 +0200 |
| commit | 99eed1e3c7e7292aea91131baeb36f81e23e3e82 (patch) | |
| tree | eb1afe9e57736bb1e9113ece476b9d8f0dcc7917 /src/main/java/com/c2kernel/gui/graph/controller/DeletionController.java | |
Initial refactor from kernel
Diffstat (limited to 'src/main/java/com/c2kernel/gui/graph/controller/DeletionController.java')
| -rw-r--r-- | src/main/java/com/c2kernel/gui/graph/controller/DeletionController.java | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/src/main/java/com/c2kernel/gui/graph/controller/DeletionController.java b/src/main/java/com/c2kernel/gui/graph/controller/DeletionController.java new file mode 100644 index 0000000..4a8fb47 --- /dev/null +++ b/src/main/java/com/c2kernel/gui/graph/controller/DeletionController.java @@ -0,0 +1,92 @@ +package com.c2kernel.gui.graph.controller;
+
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.KeyAdapter;
+import java.awt.event.KeyEvent;
+import java.util.Observable;
+import java.util.Observer;
+
+import javax.swing.JButton;
+
+import com.c2kernel.graph.event.SelectionChangedEvent;
+import com.c2kernel.graph.model.DirectedEdge;
+import com.c2kernel.graph.model.GraphModelManager;
+import com.c2kernel.graph.model.Vertex;
+
+
+// The deletion controller is responsible for deleting the present
+// selection within the graph.
+//
+// The controller listens to:
+// * The graph model to determine if there is a selection
+// * The delete button
+// * The graph panel for the typing of the delete key
+//
+// The controller modifies:
+// * The graph model to delete the current selection
+// * The delete button to enable it only when there is a selection
+public class DeletionController extends KeyAdapter implements Observer, ActionListener
+{
+ private GraphModelManager mGraphModelManager = null;
+ private JButton mDeleteButton = null;
+
+
+ public void setGraphModelManager(GraphModelManager graphModelManager)
+ {
+ mGraphModelManager = graphModelManager;
+ mGraphModelManager.addObserver(this);
+ }
+
+
+ public void setDeleteButton(JButton deleteButton)
+ {
+ mDeleteButton = deleteButton;
+ mDeleteButton.addActionListener(this);
+ }
+
+
+ // Invoked by the graph model
+ @Override
+ public void update(Observable o, Object arg)
+ {
+ SelectionChangedEvent event = null;
+ DirectedEdge selectedEdge = null;
+ Vertex[] selectedVertices = null;
+
+
+ // If the selected edge has changed
+ if(arg instanceof SelectionChangedEvent && mDeleteButton != null && mGraphModelManager.isEditable())
+ {
+ // Enable the button if a single edge or single vertex is selected
+ event = (SelectionChangedEvent)arg;
+
+ selectedEdge = event.mSelection.mEdge;
+ selectedVertices = event.mSelection.mVertices;
+
+ mDeleteButton.setEnabled((selectedEdge != null) || (selectedVertices != null));
+ }
+ }
+
+
+ // Invoked by the graph panel
+ @Override
+ public void keyPressed(KeyEvent e)
+ {
+ if(e.getKeyCode() == KeyEvent.VK_DELETE && mGraphModelManager.isEditable())
+ {
+ mGraphModelManager.getModel().deleteSelection();
+ }
+ }
+
+
+ // Invoked by the delete button
+ @Override
+ public void actionPerformed(ActionEvent ae)
+ {
+ if(mGraphModelManager != null && mGraphModelManager.isEditable())
+ {
+ mGraphModelManager.getModel().deleteSelection();
+ }
+ }
+}
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