protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
{
base.OnMouseLeftButtonDown(e);
if (null == ViewModel)
{
return;
}
Keyboard.Focus(this);
_ZoomAndPanStartMatrix = ZoomAndPan.Matrix;
_LeftButtonDownPos = e.GetPosition(this);
_PrevMousePos = _LeftButtonDownPos;
if (!NodeGraphManager.IsNodeDragging &&
!NodeGraphManager.IsConnecting &&
!NodeGraphManager.IsSelecting)
{
Point mousePos = e.GetPosition(this);
NodeGraphManager.BeginDragSelection(ViewModel.Model,
_ZoomAndPan.MatrixInv.Transform(mousePos));
ViewModel.SelectionStartX = mousePos.X;
ViewModel.SelectionWidth = 0;
ViewModel.SelectionStartY = mousePos.Y;
ViewModel.SelectionHeight = 0;
bool bCtrl = Keyboard.IsKeyDown(Key.LeftCtrl);
bool bShift = Keyboard.IsKeyDown(Key.LeftShift);
bool bAlt = Keyboard.IsKeyDown(Key.LeftAlt);
if (!bCtrl && !bShift && !bAlt)
{
NodeGraphManager.DeselectAllNodes(ViewModel.Model);
}
}
}
protected override void OnKeyDown(KeyEventArgs e)
{
base.OnKeyDown(e);
if (null == ViewModel)
{
return;
}
if (IsFocused)
{
if (Key.Delete == e.Key)
{
FlowChart flowChart = ViewModel.Model;
flowChart.History.BeginTransaction("Destroy Selected Nodes");
{
NodeGraphManager.DestroySelectedNodes(ViewModel.Model);
}
flowChart.History.EndTransaction(false);
}
else if (Key.Escape == e.Key)
{
FlowChart flowChart = ViewModel.Model;
flowChart.History.BeginTransaction("Destroy Selected Nodes");
{
NodeGraphManager.DeselectAllNodes(ViewModel.Model);
}
flowChart.History.EndTransaction(false);
}
else if (Key.A == e.Key)
{
if (Keyboard.IsKeyDown(Key.LeftCtrl))
{
NodeGraphManager.SelectAllNodes(ViewModel.Model);
}
else
{
FitNodesToView(false);
}
}
else if (Key.F == e.Key)
{
FitNodesToView(true);
}
else if (Key.Z == e.Key)
{
if (Keyboard.IsKeyDown(Key.LeftCtrl))
{
History.NodeGraphHistory history = ViewModel.Model.History;
history.Undo();
}
}
else if (Key.Y == e.Key)
{
if (Keyboard.IsKeyDown(Key.LeftCtrl))
{
History.NodeGraphHistory history = ViewModel.Model.History;
history.Redo();
}
}
}
}