private void CanvasMouseDown(object sender, MouseEventArgs e)
{
if (!(e.OriginalSource is Canvas))
{
return;
}
if (mouseState != MouseState.Normal)
{
return;
}
Point mousePosition = e.GetPosition(canvas);
mouseShiftDownPosition = mousePosition;
if (Forms.Control.ModifierKeys == Forms.Keys.Shift || Forms.Control.ModifierKeys == (Forms.Keys.Shift | Forms.Keys.Control))
{
mouseShiftDown = true;
canvas.CaptureMouse();
Canvas.SetLeft(selectionBox, mouseShiftDownPosition.X);
Canvas.SetTop(selectionBox, mouseShiftDownPosition.Y);
selectionBox.Width = 0;
selectionBox.Height = 0;
selectionBox.Visibility = Visibility.Visible;
}
if (GraphMode == GraphMode.DraggingMode)
{
if (!(Forms.Control.ModifierKeys == Forms.Keys.Control || Forms.Control.ModifierKeys == (Forms.Keys.Shift | Forms.Keys.Control)))
{
CleanSelectedVertices();
CleanSelectedEdges();
}
previousMousePosition = mousePosition;
mouseState = MouseState.MovingGraph;
ViewWindow.Static = true;
}
else if (GraphMode == GraphMode.InsertingMode)
{
if (Forms.Control.ModifierKeys == Forms.Keys.Shift || Forms.Control.ModifierKeys == (Forms.Keys.Shift | Forms.Keys.Control))
{
return;
}
Point corePos = ViewWindow.VisualToCorePosition(mousePosition);
clickedVertex = Core.CreateVertex(corePos.X, corePos.Y);
SelectionProcessing();
}
}
