public MainViewModel()
{
pullCanvas = new PullCanvas(false, false, false);
MouseDownCanvasCommand = new RelayCommand<MouseButtonEventArgs>(MouseDownCanvas);
MouseMoveCanvasCommand = new RelayCommand<MouseEventArgs>(MouseMoveCanvas);
MouseUpCanvasCommand = new RelayCommand<MouseButtonEventArgs>(MouseUpCanvas);
}
private void MouseDownCanvas(MouseButtonEventArgs e)
{
Point CurrentMousePosition = Mouse.GetPosition(e.MouseDevice.Target);
if (CurrentMousePosition.X <= CanvasWidth + 10 && CurrentMousePosition.X >= CanvasWidth - 10 && CurrentMousePosition.Y <= CanvasHeight + 10 && CurrentMousePosition.Y >= CanvasHeight - 10)
{
pullCanvas = new PullCanvas(true,true,true);
}
else if(CurrentMousePosition.X <= CanvasWidth + 10 && CurrentMousePosition.X >= CanvasWidth - 10)
{
pullCanvas = new PullCanvas(true, true, false);
}
else if(CurrentMousePosition.Y <= CanvasHeight + 10 && CurrentMousePosition.Y >= CanvasHeight - 10)
{
pullCanvas = new PullCanvas(true, false, true);
}
else
{
if (!nodeClicked)
{
clearSelectedNodes();
SelectionBoxStart = Mouse.GetPosition(e.MouseDevice.Target);
MouseDownCanvasCalled = true;
NodeBoxUpdate();
isAddingLine = false;
isChangingColor = false;
isChangingColorText = false;
Messenger.Default.Send(Cursors.Arrow);
if (fromNode != null) { fromNode.Color = fromNode.PreColor; fromNode = null; }
}
else
{
var node = TargetShape(e);
if(editNode != null && node != editNode)
{
NodeBoxUpdate();
}
}
}
e.MouseDevice.Target.CaptureMouse();
}
private void MouseUpCanvas(MouseButtonEventArgs e)
{
if(Mouse.Captured != null)
{
if (!isAddingLine && MouseDownCanvasCalled)
{
MouseDownCanvasCalled = false;
var SelectionBoxEnd = Mouse.GetPosition(e.MouseDevice.Target);
var smallX = Math.Min(SelectionBoxStart.X, SelectionBoxEnd.X);
var smallY = Math.Min(SelectionBoxStart.Y, SelectionBoxEnd.Y);
var largeX = Math.Max(SelectionBoxStart.X, SelectionBoxEnd.X);
var largeY = Math.Max(SelectionBoxStart.Y, SelectionBoxEnd.Y);
foreach (NodeViewModel n in Nodes)
if (!(n.X > largeX || n.X + n.Diameter < smallX || n.Y > largeY || n.Y + n.Diameter < smallY))
{
addToSelectedNodes(n);
}
SelectionBoxX = SelectionBoxY = SelectionBoxWidth = SelectionBoxHeight = 0;
RaisePropertyChanged(() => SelectionBoxX);
RaisePropertyChanged(() => SelectionBoxY);
RaisePropertyChanged(() => SelectionBoxWidth);
RaisePropertyChanged(() => SelectionBoxHeight);
}
if (pullCanvas.isPullingCanvas)
{
Func<NodeViewModel, bool> isInsideCanvasWidth = n => n.X + n.Diameter < CanvasWidth && n.X > 0;
Func<NodeViewModel, bool> isInsideCanvasHeight = n => n.Y + n.Diameter < CanvasHeight && n.Y > 0;
foreach (var n in Nodes)
{
if (!isInsideCanvasWidth(n)) CanvasWidth = (int)n.X + (int)n.Diameter;
if (!isInsideCanvasHeight(n)) CanvasHeight = (int)n.Y + (int)n.Diameter;
}
if (CanvasHeight < 0) CanvasHeight = 100;
if (CanvasWidth < 0) CanvasWidth = 100;
pullCanvas = new PullCanvas(false, false, false);
}
e.MouseDevice.Target.ReleaseMouseCapture();
}
}