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();
}
}
private void MouseZoom(object sender, MouseWheelEventArgs e)
{
Point position = ViewWindow.VisualToCorePosition(e.GetPosition(canvas));
ViewWindow.SetZoom(e.Delta / 120.0, position);
}
private void MouseMove(object sender, MouseEventArgs e)
{
Point mousePosition = e.GetPosition(canvas);
if (mouseShiftDown && Forms.Control.ModifierKeys == Forms.Keys.Shift || Forms.Control.ModifierKeys == (Forms.Keys.Shift | Forms.Keys.Control))
{
if (mouseShiftDownPosition.X < mousePosition.X)
{
Canvas.SetLeft(selectionBox, mouseShiftDownPosition.X);
selectionBox.Width = mousePosition.X - mouseShiftDownPosition.X;
}
else
{
Canvas.SetLeft(selectionBox, mousePosition.X);
selectionBox.Width = mouseShiftDownPosition.X - mousePosition.X;
}
if (mouseShiftDownPosition.Y < mousePosition.Y)
{
Canvas.SetTop(selectionBox, mouseShiftDownPosition.Y);
selectionBox.Height = mousePosition.Y - mouseShiftDownPosition.Y;
}
else
{
Canvas.SetTop(selectionBox, mousePosition.Y);
selectionBox.Height = mouseShiftDownPosition.Y - mousePosition.Y;
}
previousMousePosition = mousePosition;
return;
}
else if (mouseShiftDown)
{
mouseShiftDown = false;
canvas.ReleaseMouseCapture();
selectionBox.Visibility = Visibility.Collapsed;
}
if (GraphMode == GraphMode.DraggingMode)
{
if (mouseState == MouseState.Normal)
{
return;
}
Vector coreShift = ViewWindow.VisualToCorePosition(mousePosition) -
ViewWindow.VisualToCorePosition(previousMousePosition);
previousMousePosition = mousePosition;
if (mouseState == MouseState.MovingVertex && clickedVertex != null)
{
clickedVertex.Shift(coreShift);
}
else if (mouseState == MouseState.MovingGraph)
{
ViewWindow.Shift(coreShift);
}
}
else
{
if (Mouse.LeftButton == MouseButtonState.Pressed)
{
addedEdge.X2 = mousePosition.X - 1;
addedEdge.Y2 = mousePosition.Y - 1;
if (mousePosition.X < addedEdge.X1)
{
addedEdge.X2 += 2;
}
if (mousePosition.Y < addedEdge.Y1)
{
addedEdge.Y2 += 2;
}
}
}
}