diff options
Diffstat (limited to 'source/com/c2kernel/graph/controller/EdgeConstructionController.java')
| -rwxr-xr-x | source/com/c2kernel/graph/controller/EdgeConstructionController.java | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/source/com/c2kernel/graph/controller/EdgeConstructionController.java b/source/com/c2kernel/graph/controller/EdgeConstructionController.java new file mode 100755 index 0000000..fdf52bf --- /dev/null +++ b/source/com/c2kernel/graph/controller/EdgeConstructionController.java @@ -0,0 +1,244 @@ +package com.c2kernel.graph.controller;
+
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.awt.event.MouseMotionListener;
+
+import com.c2kernel.graph.model.GraphModelManager;
+import com.c2kernel.graph.model.GraphPoint;
+import com.c2kernel.graph.model.Vertex;
+import com.c2kernel.graph.view.EditorModeListener;
+import com.c2kernel.graph.view.EditorToolBar;
+
+
+public class EdgeConstructionController extends MouseAdapter implements MouseMotionListener, EditorModeListener
+{
+ private GraphModelManager mGraphModelManager = null;
+ private EditorToolBar mEditorToolBar = null;
+
+
+ /**********/
+ /* States */
+ /**********/
+ private final Integer kOtherMode = new Integer(0);
+ private final Integer kWaitOrigin = new Integer(1);
+ private final Integer kWaitTerminus = new Integer(2);
+
+
+ /**********/
+ /* Events */
+ /**********/
+ private final int kEdgeEntered = 0;
+ private final int kOtherEntered = 1;
+ private final int kPressOnVertex = 2;
+ private final int kDrag = 3;
+ private final int kReleaseOnTerminus = 4;
+ private final int kReleaseOnNothing = 5;
+
+
+ /***********/
+ /* Actions */
+ /***********/
+
+ private interface Action
+ {
+ public void doIt(Object data);
+ }
+
+
+ private Action mSetOriginVertex = new Action()
+ {
+ public void doIt(Object data)
+ {
+ if(mGraphModelManager != null)
+ {
+ mGraphModelManager.getModel().setNewEdgeOriginVertex((Vertex)data);
+ }
+ }
+ };
+
+
+ private Action mSetEndPoint = new Action()
+ {
+ public void doIt(Object data)
+ {
+ if(mGraphModelManager != null)
+ {
+ mGraphModelManager.getModel().setNewEdgeEndPoint((Point)data);
+ }
+ }
+ };
+
+
+ private Action mClearEdge = new Action()
+ {
+ public void doIt(Object data)
+ {
+ if(mGraphModelManager != null)
+ {
+ mGraphModelManager.getModel().setNewEdgeOriginVertex(null);
+ mGraphModelManager.getModel().setNewEdgeEndPoint(null);
+ }
+ }
+ };
+
+
+ private Action mCreateEdge = new Action()
+ {
+ public void doIt(Object data)
+ {
+ if((mGraphModelManager != null) && (mEditorToolBar != null) && mGraphModelManager.isEditable())
+ {
+ mGraphModelManager.getModel().createDirectedEdge
+ (
+ mGraphModelManager.getModel().getNewEdgeOriginVertex(),
+ (Vertex)data,
+ mEditorToolBar.getSelectedEdgeType()
+ );
+ mGraphModelManager.getModel().setNewEdgeOriginVertex(null);
+ mGraphModelManager.getModel().setNewEdgeEndPoint(null);
+ }
+ }
+ };
+
+
+ /***********************************/
+ /* Finite State Transition Network */
+ /***********************************/
+
+ private Object[][][] mFSTN =
+ {// OtherMode WaitOrigin WaitTerminus
+ /* EdgeEntered */ {{null, kWaitOrigin}, null , null },
+ /* OtherEntered */ { null , {null , kOtherMode} , null },
+ /* PressOnVertex */ { null , {mSetOriginVertex, kWaitTerminus}, null },
+ /* Drag */ { null , null , {mSetEndPoint, null} },
+ /* ReleaseOnTerminus */ { null , null , {mCreateEdge , kWaitOrigin}},
+ /* ReleaseOnNothing */ { null , null , {mClearEdge , kWaitOrigin}}
+ };
+
+
+ /*****************/
+ /* Current state */
+ /*****************/
+
+ private Integer mState = kOtherMode;
+
+
+ /**************************/
+ /* Event processing logic */
+ /**************************/
+
+ private void processEvent(int event, Object data)
+ {
+ Object[] transition = mFSTN[event][mState.intValue()];
+ Action action = null;
+ Integer nextState = null;
+
+ if(transition != null)
+ {
+ action = (Action)transition[0];
+ nextState = (Integer)transition[1];
+
+ if(action != null)
+ {
+ action.doIt(data);
+ }
+
+ if(nextState != null)
+ {
+ mState = nextState;
+ }
+ }
+ }
+
+
+ /********************/
+ /* Public interface */
+ /********************/
+
+ public void setGraphModelManager(GraphModelManager graphModelManager)
+ {
+ mGraphModelManager = graphModelManager;
+ }
+
+
+ public void setEditorToolBar(EditorToolBar editorToolBar)
+ {
+ mEditorToolBar = editorToolBar;
+ mEditorToolBar.addEditorModeListener(this);
+ }
+
+
+ public void editorModeChanged(String idOfNewMode)
+ {
+ if(idOfNewMode.equals("Edge"))
+ {
+ processEvent(kEdgeEntered, null);
+ }
+ else
+ {
+ processEvent(kOtherEntered, null);
+ }
+ }
+
+
+ public void mousePressed(MouseEvent me)
+ {
+ Vertex vertex = null;
+ Point mousePoint = null;
+
+ if(mGraphModelManager != null)
+ {
+ // Determine if there is a vertex under the mouse cursor
+ mousePoint = me.getPoint();
+ vertex = mGraphModelManager.getModel().getVertex(new GraphPoint(mousePoint.x, mousePoint.y));
+
+ // If the mouse has been pressed on a vertex
+ if(vertex != null)
+ {
+ processEvent(kPressOnVertex, vertex);
+ }
+ }
+ }
+
+
+ public void mouseReleased(MouseEvent me)
+ {
+ Vertex vertex = null;
+ Point mousePoint = null;
+
+ if(mGraphModelManager != null)
+ {
+ // Determine if there is a vertex under the mouse cursor
+ mousePoint = me.getPoint();
+ vertex = mGraphModelManager.getModel().getVertex(new GraphPoint(mousePoint.x, mousePoint.y));
+
+ // If the mouse has been released on a vertex which is not the origin vertex
+ if((vertex != null) && (vertex != mGraphModelManager.getModel().getNewEdgeOriginVertex()))
+ {
+ processEvent(kReleaseOnTerminus, vertex);
+ }
+ else
+ {
+ processEvent(kReleaseOnNothing, null);
+ }
+ }
+ }
+
+
+ public void mouseExited(MouseEvent me)
+ {
+ }
+
+
+ public void mouseDragged(MouseEvent me)
+ {
+ processEvent(kDrag, me.getPoint());
+ }
+
+
+ public void mouseMoved(MouseEvent me)
+ {
+ }
+}
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