protected void SetAnchorCursor()
{
BaseController controller = serviceManager.Get <IFlowSharpCanvasService>().ActiveController;
ShapeAnchor anchor = HoverShape.GetAnchors().FirstOrDefault(a => a.Near(CurrentMousePosition));
// Hover shape could have changed as we move from a shape to a connector's anchor.
if (anchor != null)
{
controller.Canvas.Cursor = anchor.Cursor;
}
}
protected void DragAnchor()
{
BaseController controller = serviceManager.Get <IFlowSharpCanvasService>().ActiveController;
Point delta = CurrentMousePosition.Delta(LastMousePosition);
GraphicElement hoverShape = HoverShape;
ShapeAnchor selectedAnchor = SelectedAnchor;
if (!controller.SnapController.SnapCheck(selectedAnchor.Type, delta, (snapDelta) => hoverShape.UpdateSize(selectedAnchor, snapDelta)))
{
hoverShape.UpdateSize(selectedAnchor, delta);
controller.SnapController.UpdateRunningDelta(delta);
}
}
public virtual void InitializeBehavior()
{
// Any mouse down fires the MouseClick event for external handling.
router.Add(new MouseRouter()
{
RouteName = RouteName.FireMouseClickEvent,
MouseEvent = MouseEvent.MouseDown,
Condition = () => true,
Action = (mouseEventArgs) =>
{
// So Ctrl+V paste works, as keystroke is intercepted only when canvas panel has focus.
MouseClick.Fire(this, mouseEventArgs);
}
});
router.Add(new MouseRouter()
{
RouteName = RouteName.CanvasFocus,
MouseEvent = MouseEvent.MouseDown,
// Condition = () => true,
Condition = () => !serviceManager.Get <IFlowSharpCanvasService>().ActiveController.IsRootShapeSelectable(CurrentMousePosition) &&
!serviceManager.Get <IFlowSharpCanvasService>().ActiveController.IsChildShapeSelectable(CurrentMousePosition) &&
!serviceManager.Get <IFlowSharpCanvasService>().ActiveController.IsMultiSelect(),
Action = (_) =>
{
// So Ctrl+V paste works, as keystroke is intercepted only when canvas panel has focus.
BaseController canvasController = serviceManager.Get <IFlowSharpCanvasService>().ActiveController;
canvasController.Canvas.Focus();
serviceManager.Get <IFlowSharpPropertyGridService>().ShowProperties(new CanvasProperties(canvasController.Canvas));
},
Else = () =>
{
// So Ctrl+V paste works, as keystroke is intercepted only when canvas panel has focus.
BaseController canvasController = serviceManager.Get <IFlowSharpCanvasService>().ActiveController;
canvasController.Canvas.Focus();
}
});
// DRAG SURFACE ROUTES:
// Start drag surface:
router.Add(new MouseRouter()
{
RouteName = RouteName.StartDragSurface,
MouseEvent = MouseEvent.MouseDown,
Condition = () => !serviceManager.Get <IFlowSharpCanvasService>().ActiveController.IsRootShapeSelectable(CurrentMousePosition) && CurrentButtons == MouseButtons.Left,
Action = (_) =>
{
DraggingSurface = true;
DraggingSurfaceOccurred = false;
}
});
// End drag surface with no dragging, which deselects all selected shapes
router.Add(new MouseRouter()
{
RouteName = RouteName.EndDragSurfaceWithDeselect,
MouseEvent = MouseEvent.MouseUp,
Condition = () => DraggingSurface && !DraggingSurfaceOccurred,
Action = (_) =>
{
DraggingSurface = false;
BaseController controller = serviceManager.Get <IFlowSharpCanvasService>().ActiveController;
controller.Canvas.Cursor = Cursors.Arrow;
List <GraphicElement> selectedShapes = controller.SelectedElements.ToList();
if (selectedShapes.Count != 0)
{
controller.UndoStack.UndoRedo("Canvas",
() =>
{
controller.DeselectCurrentSelectedElements();
},
() =>
{
controller.DeselectCurrentSelectedElements();
controller.SelectElements(selectedShapes);
});
}
}
});
// End drag surface when dragging occurred, selected shapes stay selected.
router.Add(new MouseRouter()
{
RouteName = RouteName.EndDragSurface,
MouseEvent = MouseEvent.MouseUp,
Condition = () => DraggingSurface && DraggingSurfaceOccurred,
Action = (_) =>
{
DraggingSurface = false;
DraggingSurfaceOccurred = false;
BaseController controller = serviceManager.Get <IFlowSharpCanvasService>().ActiveController;
controller.Canvas.Cursor = Cursors.Arrow;
}
});
// Drag surface:
router.Add(new MouseRouter()
{
RouteName = RouteName.DragSurface,
MouseEvent = MouseEvent.MouseMove,
Condition = () => DraggingSurface,
Action = (_) =>
{
DraggingSurfaceOccurred = true;
DragCanvas();
}
});
// SHAPE DRAGGING ROUTES:
// Start shape drag:
router.Add(new MouseRouter()
{
RouteName = RouteName.StartShapeDrag,
MouseEvent = MouseEvent.MouseDown,
Condition = () => serviceManager.Get <IFlowSharpCanvasService>().ActiveController.IsRootShapeSelectable(CurrentMousePosition) &&
CurrentButtons == MouseButtons.Left &&
serviceManager.Get <IFlowSharpCanvasService>().ActiveController.GetRootShapeAt(CurrentMousePosition).GetAnchors().FirstOrDefault(a => a.Near(CurrentMousePosition)) == null &&
!serviceManager.Get <IFlowSharpCanvasService>().ActiveController.IsChildShapeSelectable(CurrentMousePosition), // can't drag a grouped shape
Action = (_) =>
{
BaseController controller = serviceManager.Get <IFlowSharpCanvasService>().ActiveController;
controller.SnapController.Reset();
controller.DeselectGroupedElements();
DraggingShapes = true;
startedDraggingShapesAt = CurrentMousePosition;
},
});
// Start anchor drag:
router.Add(new MouseRouter()
{
RouteName = RouteName.StartAnchorDrag,
MouseEvent = MouseEvent.MouseDown,
Condition = () => serviceManager.Get <IFlowSharpCanvasService>().ActiveController.IsRootShapeSelectable(CurrentMousePosition) &&
CurrentButtons == MouseButtons.Left &&
serviceManager.Get <IFlowSharpCanvasService>().ActiveController.GetRootShapeAt(CurrentMousePosition).GetAnchors().FirstOrDefault(a => a.Near(CurrentMousePosition)) != null,
Action = (_) =>
{
BaseController controller = serviceManager.Get <IFlowSharpCanvasService>().ActiveController;
controller.SnapController.Reset();
DraggingAnchor = true;
HoverShape = serviceManager.Get <IFlowSharpCanvasService>().ActiveController.GetRootShapeAt(CurrentMousePosition);
SelectedAnchor = HoverShape.GetAnchors().First(a => a.Near(CurrentMousePosition));
},
});
// End shape dragging:
router.Add(new MouseRouter()
{
// TODO: Similar to EndAnchorDrag and Toolbox.OnMouseUp
RouteName = RouteName.EndShapeDrag,
MouseEvent = MouseEvent.MouseUp,
Condition = () => DraggingShapes,
Action = (_) =>
{
BaseController controller = serviceManager.Get <IFlowSharpCanvasService>().ActiveController;
controller.SnapController.DoUndoSnapActions(controller.UndoStack);
if (controller.SnapController.RunningDelta != Point.Empty)
{
Point delta = controller.SnapController.RunningDelta; // for closure
controller.UndoStack.UndoRedo("ShapeMove",
() => { }, // Our "do" action is actually nothing, since all the "doing" has been done.
() => // Undo
{
controller.DragSelectedElements(delta.ReverseDirection());
},
true, // We finish the move.
() => // Redo
{
controller.DragSelectedElements(delta);
});
}
controller.SnapController.HideConnectionPoints();
controller.SnapController.Reset();
DraggingShapes = false;
// DraggingOccurred = false; / Will be cleared by RemoveSelectedShape but this is order dependent! TODO: Fix this somehow! :)
DraggingAnchor = false;
SelectedAnchor = null;
controller.Canvas.Cursor = Cursors.Arrow;
}
});
// End anchor dragging:
router.Add(new MouseRouter()
{
// TODO: Similar to EndShapeDrag and Toolbox.OnMouseUp
RouteName = RouteName.EndAnchorDrag,
MouseEvent = MouseEvent.MouseUp,
Condition = () => DraggingAnchor,
Action = (_) =>
{
BaseController controller = serviceManager.Get <IFlowSharpCanvasService>().ActiveController;
controller.SnapController.DoUndoSnapActions(controller.UndoStack);
if (controller.SnapController.RunningDelta != Point.Empty)
{
Point delta = controller.SnapController.RunningDelta; // for closure
GraphicElement hoverShape = HoverShape;
ShapeAnchor selectedAnchor = SelectedAnchor;
controller.UndoStack.UndoRedo("AnchorMove",
() => { }, // Our "do" action is actually nothing, since all the "doing" has been done.
() => // Undo
{
hoverShape.UpdateSize(selectedAnchor, delta.ReverseDirection());
},
true, // We finish the anchor drag.
() => // Redo
{
hoverShape.UpdateSize(selectedAnchor, delta);
});
}
controller.SnapController.HideConnectionPoints();
controller.SnapController.Reset();
DraggingShapes = false;
// DraggingOccurred = false; / Will be cleared by RemoveSelectedShape but this is order dependent! TODO: Fix this somehow! :)
DraggingAnchor = false;
SelectedAnchor = null;
controller.Canvas.Cursor = Cursors.Arrow;
}
});
// Drag shapes:
router.Add(new MouseRouter()
{
RouteName = RouteName.DragShapes,
MouseEvent = MouseEvent.MouseMove,
Condition = () => DraggingShapes &&
HoverShape != null &&
HoverShape.GetAnchors().FirstOrDefault(a => a.Near(CurrentMousePosition)) == null,
Action = (_) =>
{
DragShapes();
DraggingOccurred = true;
},
});
// Drag anchor:
router.Add(new MouseRouter()
{
RouteName = RouteName.DragAnchor,
MouseEvent = MouseEvent.MouseMove,
Condition = () => HoverShape != null && DraggingAnchor,
Action = (_) =>
{
DragAnchor();
},
});
// HOVER ROUTES
// Show anchors when hovering over a shape
router.Add(new MouseRouter()
{
RouteName = RouteName.HoverOverShape,
MouseEvent = MouseEvent.MouseMove,
Condition = () => !DraggingSurface && !DraggingShapes && !SelectingShapes && HoverShape == null &&
CurrentButtons == MouseButtons.None &&
serviceManager.Get <IFlowSharpCanvasService>().ActiveController.IsRootShapeSelectable(CurrentMousePosition) &&
serviceManager.Get <IFlowSharpCanvasService>().ActiveController.GetRootShapeAt(CurrentMousePosition).Parent == null, // no anchors for grouped children.
Action = (_) => ShowAnchors(),
});
// Change anchors when hover shape changes
router.Add(new MouseRouter()
{
RouteName = RouteName.ShowAnchors,
MouseEvent = MouseEvent.MouseMove,
Condition = () => !DraggingSurface && !DraggingShapes && !SelectingShapes && HoverShape != null &&
CurrentButtons == MouseButtons.None &&
serviceManager.Get <IFlowSharpCanvasService>().ActiveController.IsRootShapeSelectable(CurrentMousePosition) &&
HoverShape != serviceManager.Get <IFlowSharpCanvasService>().ActiveController.GetRootShapeAt(CurrentMousePosition) &&
serviceManager.Get <IFlowSharpCanvasService>().ActiveController.GetRootShapeAt(CurrentMousePosition).Parent == null, // no anchors for grouped children.
Action = (_) => ChangeAnchors(),
});
// Hide anchors when not hovering over a shape
router.Add(new MouseRouter()
{
RouteName = RouteName.HideAnchors,
MouseEvent = MouseEvent.MouseMove,
Condition = () => !DraggingSurface && !DraggingShapes && !SelectingShapes && HoverShape != null &&
CurrentButtons == MouseButtons.None &&
!serviceManager.Get <IFlowSharpCanvasService>().ActiveController.IsRootShapeSelectable(CurrentMousePosition),
Action = (_) => HideAnchors(),
});
// Show cursor when hovering over an anchor
router.Add(new MouseRouter()
{
RouteName = RouteName.ShowAnchorCursor,
MouseEvent = MouseEvent.MouseMove,
Condition = () => !DraggingSurface && !DraggingShapes && !SelectingShapes && !DraggingAnchor && HoverShape != null &&
HoverShape.GetAnchors().FirstOrDefault(a => a.Near(CurrentMousePosition)) != null,
Action = (_) => SetAnchorCursor(),
});
// Clear cursor when hovering over an anchor
router.Add(new MouseRouter()
{
RouteName = RouteName.ClearAnchorCursor,
MouseEvent = MouseEvent.MouseMove,
Condition = () => !DraggingSurface && !DraggingShapes && !SelectingShapes && HoverShape != null &&
HoverShape.GetAnchors().FirstOrDefault(a => a.Near(CurrentMousePosition)) == null,
Action = (_) => ClearAnchorCursor(),
});
// SHAPE SELECTION
// Select a shape
router.Add(new MouseRouter()
{
RouteName = RouteName.SelectSingleShapeMouseDown,
MouseEvent = MouseEvent.MouseDown,
Condition = () => serviceManager.Get <IFlowSharpCanvasService>().ActiveController.IsRootShapeSelectable(CurrentMousePosition) &&
!serviceManager.Get <IFlowSharpCanvasService>().ActiveController.IsChildShapeSelectable(CurrentMousePosition) &&
!serviceManager.Get <IFlowSharpCanvasService>().ActiveController.IsMultiSelect() &&
!serviceManager.Get <IFlowSharpCanvasService>().ActiveController.SelectedElements.Contains(serviceManager.Get <IFlowSharpCanvasService>().ActiveController.GetRootShapeAt(CurrentMousePosition)),
Action = (_) => SelectSingleRootShape()
});
// Select a single grouped shape:
router.Add(new MouseRouter()
{
RouteName = RouteName.SelectSingleGroupedShape,
MouseEvent = MouseEvent.MouseDown,
Condition = () => serviceManager.Get <IFlowSharpCanvasService>().ActiveController.IsChildShapeSelectable(CurrentMousePosition) &&
!serviceManager.Get <IFlowSharpCanvasService>().ActiveController.IsMultiSelect() &&
!serviceManager.Get <IFlowSharpCanvasService>().ActiveController.SelectedElements.Contains(serviceManager.Get <IFlowSharpCanvasService>().ActiveController.GetChildShapeAt(CurrentMousePosition)),
Action = (_) => SelectSingleChildShape()
});
// Select a single shape
router.Add(new MouseRouter()
{
RouteName = RouteName.SelectSingleShapeMouseUp,
MouseEvent = MouseEvent.MouseUp,
Condition = () => serviceManager.Get <IFlowSharpCanvasService>().ActiveController.IsRootShapeSelectable(CurrentMousePosition) &&
!serviceManager.Get <IFlowSharpCanvasService>().ActiveController.IsChildShapeSelectable(CurrentMousePosition) && // Don't deselect grouped shape on mouse up (as in, don't select groupbox)
!serviceManager.Get <IFlowSharpCanvasService>().ActiveController.IsMultiSelect() &&
!DraggingOccurred && !DraggingSelectionBox,
Action = (_) => SelectSingleRootShape()
});
// Add another shape to selection list
router.Add(new MouseRouter()
{
RouteName = RouteName.AddSelectedShape,
MouseEvent = MouseEvent.MouseUp,
Condition = () => serviceManager.Get <IFlowSharpCanvasService>().ActiveController.IsRootShapeSelectable(CurrentMousePosition) &&
serviceManager.Get <IFlowSharpCanvasService>().ActiveController.IsMultiSelect() && !DraggingSelectionBox &&
!serviceManager.Get <IFlowSharpCanvasService>().ActiveController.SelectedElements.Contains(serviceManager.Get <IFlowSharpCanvasService>().ActiveController.GetRootShapeAt(CurrentMousePosition)),
Action = (_) => AddShapeToSelectionList(),
});
// Remove shape from selection list
router.Add(new MouseRouter()
{
RouteName = RouteName.RemoveSelectedShape,
MouseEvent = MouseEvent.MouseUp,
Condition = () => serviceManager.Get <IFlowSharpCanvasService>().ActiveController.IsRootShapeSelectable(CurrentMousePosition) &&
serviceManager.Get <IFlowSharpCanvasService>().ActiveController.IsMultiSelect() && !DraggingSelectionBox &&
// TODO: Would nice to avoid multiple GetShapeAt calls when processing conditions. And not just here.
serviceManager.Get <IFlowSharpCanvasService>().ActiveController.SelectedElements.Contains(serviceManager.Get <IFlowSharpCanvasService>().ActiveController.GetRootShapeAt(CurrentMousePosition)) &&
!justAddedShape.Contains(serviceManager.Get <IFlowSharpCanvasService>().ActiveController.GetRootShapeAt(CurrentMousePosition)) &&
!DraggingOccurred,
Action = (_) => RemoveShapeFromSelectionList(),
Else = () =>
{
justAddedShape.Clear();
DraggingOccurred = false;
},
Debug = () =>
{
Trace.WriteLine("Route:IsRootShapeSelectable: " + serviceManager.Get <IFlowSharpCanvasService>().ActiveController.IsRootShapeSelectable(CurrentMousePosition));
Trace.WriteLine("Route:IsMultiSelect: " + serviceManager.Get <IFlowSharpCanvasService>().ActiveController.IsMultiSelect());
Trace.WriteLine("Route:!DraggingSelectionBox: " + !DraggingSelectionBox);
Trace.WriteLine("Route:SelectedElements.ContainsShape: " + serviceManager.Get <IFlowSharpCanvasService>().ActiveController.SelectedElements.Contains(serviceManager.Get <IFlowSharpCanvasService>().ActiveController.GetRootShapeAt(CurrentMousePosition)));
Trace.WriteLine("Route:!justShapeAdded: " + !justAddedShape.Contains(serviceManager.Get <IFlowSharpCanvasService>().ActiveController.GetRootShapeAt(CurrentMousePosition)));
Trace.WriteLine("Route:!DraggingOccurred: " + !DraggingOccurred);
}
});
// SELECTION BOX
// Start selection box
router.Add(new MouseRouter()
{
RouteName = RouteName.StartDragSelectionBox,
MouseEvent = MouseEvent.MouseDown,
Condition = () => !serviceManager.Get <IFlowSharpCanvasService>().ActiveController.IsRootShapeSelectable(CurrentMousePosition) && CurrentButtons == MouseButtons.Right,
Action = (_) =>
{
DraggingSelectionBox = true;
StartSelectionPosition = CurrentMousePosition;
CreateSelectionBox();
},
});
// End selection box
router.Add(new MouseRouter()
{
RouteName = RouteName.EndDragSelectionBox,
MouseEvent = MouseEvent.MouseUp,
Condition = () => DraggingSelectionBox,
Action = (_) =>
{
DraggingSelectionBox = false;
SelectShapesInSelectionBox();
}
});
// Drag selection box
router.Add(new MouseRouter()
{
RouteName = RouteName.DragSelectionBox,
MouseEvent = MouseEvent.MouseMove,
Condition = () => DraggingSelectionBox,
Action = (_) => DragSelectionBox(),
});
// Edit Text
router.Add(new MouseRouter()
{
RouteName = RouteName.EditShapeText,
MouseEvent = MouseEvent.MouseDoubleClick,
Condition = () => true,
Action = (_) =>
{
if (doubleClickCounter == 0)
{
++doubleClickCounter;
serviceManager.Get <IFlowSharpEditService>().EditText();
// Reset counter after 1/2 second, so the second double click is ignored.
Task.Run(() =>
{
Thread.Sleep(500);
doubleClickCounter = 0;
});
}
}
});
}