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1
8 package com.nightlabs.editor2d.tools;
9
10 import org.apache.log4j.Logger;
11 import org.eclipse.draw2d.Ellipse;
12 import org.eclipse.draw2d.PositionConstants;
13 import org.eclipse.draw2d.geometry.Point;
14 import org.eclipse.draw2d.geometry.PrecisionRectangle;
15 import org.eclipse.draw2d.geometry.Rectangle;
16 import org.eclipse.gef.SnapToHelper;
17 import org.eclipse.gef.requests.CreationFactory;
18
19 import com.nightlabs.editor2d.command.CreateShapeCommand;
20 import com.nightlabs.editor2d.j2d.GeneralShape;
21 import com.nightlabs.editor2d.request.EditorCreateRequest;
22 import com.nightlabs.editor2d.util.EditorGeneralShapeFactory;
23
24
25 public class EllipseTool
26 extends EditorCreationTool
27 {
28 public static final Logger LOGGER = Logger.getLogger(EllipseTool.class);
29
30 public EllipseTool(CreationFactory aFactory)
31 {
32 super(aFactory);
33 }
34
35 protected Ellipse ellipse;
36
37
40 public void deactivate()
41 {
42 super.deactivate();
43 helper = null;
44 }
45
46 protected boolean handleButtonDown(int button)
47 {
48 if (button == 1)
49 {
50 Point p = getLocation();
51 getEditorCreateRequest().setLocation(p);
52 lockTargetEditPart(getTargetEditPart());
53 helper = (SnapToHelper)getTargetEditPart().getAdapter(SnapToHelper.class);
55
56 ellipse = new Ellipse();
57 Rectangle bounds = new Rectangle(p.x, p.y, p.x+1, p.y+1);
58 ellipse.setBounds(bounds);
59 getEditorCreateRequest().setUseShape(true);
60 getEditorCreateRequest().setShape(ellipse);
61
62 stateTransition(STATE_INITIAL, STATE_DRAG_IN_PROGRESS);
63 setCursor(getDefaultCursor());
64 }
65 return true;
66 }
67
68 protected void updateTargetRequest()
69 {
70 EditorCreateRequest req = (EditorCreateRequest) getCreateRequest();
71 if (isInState(STATE_DRAG_IN_PROGRESS))
72 {
73 Point loq = getStartLocation();
74 Rectangle bounds = new Rectangle(loq, loq);
75 bounds.union(loq.getTranslated(getDragMoveDelta()));
76 req.setSize(bounds.getSize());
77 req.setLocation(bounds.getLocation());
78 req.getExtendedData().clear();
79 if (!getCurrentInput().isAltKeyDown() && helper != null) {
80 PrecisionRectangle baseRect = new PrecisionRectangle(bounds);
81 PrecisionRectangle result = baseRect.getPreciseCopy();
82 helper.snapRectangle(req, PositionConstants.NSEW,
83 baseRect, result);
84 req.setLocation(result.getLocation());
85 req.setSize(result.getSize());
86 }
87 } else {
88 req.setSize(null);
89 req.setLocation(getLocation());
90 }
91 }
92
93 public void performCreation(int button)
94 {
95 GeneralShape gs = EditorGeneralShapeFactory.createEllipse(ellipse.getBounds());
96 getEditorCreateRequest().setUseShape(false);
97 if (getCurrentCommand() instanceof CreateShapeCommand) {
98 CreateShapeCommand command = (CreateShapeCommand) getCurrentCommand();
99 command.setGeneralShape(gs);
100 }
101
102 super.performCreation(button);
103 }
104 }
105 |
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