private void Timer_Tick(object sender, EventArgs e)
{
_CurrentTime += _Timer.Interval.Milliseconds;
if (null == ViewModel)
{
return;
}
if (NodeGraphManager.IsDragging)
{
MouseArea area = CheckMouseArea();
if (MouseArea.None != area)
{
Point delta = new Point(0.0, 0.0);
if (MouseArea.Left == (area & MouseArea.Left))
{
delta.X = -10.0;
}
if (MouseArea.Right == (area & MouseArea.Right))
{
delta.X = 10.0;
}
if (MouseArea.Top == (area & MouseArea.Top))
{
delta.Y = -10.0;
}
if (MouseArea.Bottom == (area & MouseArea.Bottom))
{
delta.Y = 10.0;
}
Point mousePos = Mouse.GetPosition(this);
UpdateDragging(
new Point(mousePos.X + delta.X, mousePos.Y + delta.Y), // virtual mouse-position.
delta); // virtual delta.
_ZoomAndPan.StartX += delta.X;
_ZoomAndPan.StartY += delta.Y;
}
}
else if (_IsWheeling)
{
if (200 < (_CurrentTime - _WheelStartTime))
{
_IsWheeling = false;
History.NodeGraphHistory history = ViewModel.Model.History;
history.AddCommand(new History.ZoomAndPanCommand(
"ZoomAndPan", ViewModel.Model, _ZoomAndPanStartMatrix, ZoomAndPan.Matrix));
history.EndTransaction(false);
}
}
else
{
_CurrentTime = 0.0;
}
}
protected override void OnMouseRightButtonUp(MouseButtonEventArgs e)
{
base.OnMouseRightButtonUp(e);
if (null == ViewModel)
{
return;
}
NodeGraphManager.EndConnection();
NodeGraphManager.EndDragNode();
NodeGraphManager.EndDragSelection(true);
Point mousePos = e.GetPosition(this);
Point diff = new Point(
Math.Abs(_RightButtonDownPos.X - mousePos.X),
Math.Abs(_RightButtonDownPos.Y - mousePos.Y));
bool wasDraggingCanvas = (5.0 < diff.X) || (5.0 < diff.Y);
if (_IsDraggingCanvas)
{
_IsDraggingCanvas = false;
Mouse.Capture(null);
History.NodeGraphHistory history = ViewModel.Model.History;
if (wasDraggingCanvas)
{
history.AddCommand(new History.ZoomAndPanCommand(
"ZoomAndPan", ViewModel.Model, _ZoomAndPanStartMatrix, ZoomAndPan.Matrix));
history.EndTransaction(false);
}
else
{
history.EndTransaction(true);
}
}
if (!wasDraggingCanvas)
{
Point viewSpacePos;
Point modelSpacePos;
ModelType modelType;
ModelBase model = FindModelUnderMouse(mousePos, out viewSpacePos, out modelSpacePos, out modelType);
if (null != model)
{
BuildContextMenuArgs args = new BuildContextMenuArgs();
args.ViewSpaceMouseLocation = viewSpacePos;
args.ModelSpaceMouseLocation = modelSpacePos;
args.ModelType = modelType;
ContextMenu = new ContextMenu();
ContextMenu.Closed += ContextMenu_Closed;
args.ContextMenu = ContextMenu;
if (!NodeGraphManager.InvokeBuildContextMenu(model, args))
{
ContextMenu = null;
}
}
}
}