//protected void DropTo(Topic topic, Topic target)
//{
// if (topic != null && target != null)
// {
// topic.ParentTopic = target;
// }
//}
void CancelDrag()
{
if (MouseState == ChartMouseState.Drag)
{
HideDragBox();
MouseState = ChartMouseState.Normal;
PressObject = HitTestResult.Empty;
Cursor = Cursors.Default;
}
}
protected override void OnChartMouseUp(MouseEventArgs e)
{
base.OnChartMouseUp(e);
ProcessChartMouseUp(e);
MouseState = ChartMouseState.Normal;
IsMouseDown = false;
MouseDownPos = Point.Empty;
PressObject = HitTestResult.Empty;
_ResetCursor();
}
protected override void OnMouseMethodChanged()
{
base.OnMouseMethodChanged();
switch (MouseMethod)
{
case ChartMouseMethod.Scroll:
MouseState = ChartMouseState.Scroll;
break;
case ChartMouseMethod.Select:
MouseState = ChartMouseState.Select;
break;
}
}
protected override void OnChartMouseMove(MouseEventArgs e)
{
base.OnChartMouseMove(e);
// if the Shift is press, maybe is hover hyperlink, or reverse MouseMethod
ChartMouseMethod mouseMethod = MouseMethod;
if (Helper.TestModifierKeys(Keys.Shift))
{
if (mouseMethod == ChartMouseMethod.Select)
{
mouseMethod = ChartMouseMethod.Scroll;
}
}
if (MouseState == ChartMouseState.Drag)
{
CurrentDragMethod = Helper.TestModifierKeys(Keys.Control) ? DragTopicsMethod.Copy : DragTopicsMethod.Move;
//bool canDrop = TestDrop(PressObject.Topic, HitTest(e.X, e.Y).Topic);
//ShowDragBox(PressObject.Topic, e.X, e.Y, canDrop);
bool canDrag = TestDragDrop(DragBox.Topics, HitTest(e.X, e.Y).Topic, CurrentDragMethod);
ShowDragBox(DragBox.Topics, e.X, e.Y, canDrag, CurrentDragMethod);
}
else if (mouseMethod == ChartMouseMethod.Scroll)
{
if (MouseMethod == mouseMethod)
{
MouseState = ChartMouseState.Scroll;
}
if (e.Button == MouseButtons.Left)
{
Scroll(LastMousePos.X - e.X, LastMousePos.Y - e.Y);
LastMousePos.X = e.X;
LastMousePos.Y = e.Y;
}
}
else if (IsMouseDown)
{
if (PressObject.IsEmpty) // select
{
if (e.Button == MouseButtons.Left)
{
MouseState = ChartMouseState.Select;
}
}
else if (MouseState != ChartMouseState.Drag)
{
// test drag
if (Math.Abs(MouseDownPos.X - e.X) > SystemInformation.DragSize.Width ||
Math.Abs(MouseDownPos.Y - e.Y) > SystemInformation.DragSize.Height)
{
DragBox.Start(MouseDownPos, SelectedTopics);
MouseState = ChartMouseState.Drag;
}
}
}
if (!EditMode && MouseState == ChartMouseState.Normal)
{
HoverObject = HitTest(e.X, e.Y);
}
_ResetCursor();
}
