// Handle mouse up; perform a local move
protected override void OnMouseUp(MouseEventArgs mouseEventArgs)
{
this.Cursor = Cursors.Arrow;
// Continue?
if (mouseEventArgs.Button != MouseButtons.Left)
{
return;
}
// Unregister the mouse move event
this.MouseMove -= new MouseEventHandler(DragItem_MouseMove);
// New location
this.Left += mouseEventArgs.X - startPoint.X;
this.Top += mouseEventArgs.Y - startPoint.Y;
if (!this.IsOutSide)
{
// Snap to parent grid?
this.Location = (Parent as DragContainer).SnapToGrid(this.Location); // Here we might use an interface instead of casting...
this.OrignalLocation = this.Location;
}
else
{
this.Location = this.OrignalLocation;
}
// Hide the outline object
ShaDowControl.Hide();
this.onSelectDragEvent(this.Name);
base.OnMouseUp(mouseEventArgs);
}
// Show
static public void Show(Point location, Size size)
{
// Create a new object?
if (shaDow == null)
{
shaDow = new ShaDowControl();
shaDow.Show(); // Just to get the size correct at first use (.NET bug?). Try to remove this line...
}
// Set the location and size, then show the form
shaDow.Location = location;
shaDow.Size = size;
shaDow.Show();
}
// Show
static public void Show(Point location, Size size)
{
// Create a new object?
if (shaDow == null)
{
shaDow = new ShaDowControl();
shaDow.Show(); // Just to get the size correct at first use (.NET bug?). Try to remove this line...
}
// Set the location and size, then show the form
shaDow.Location = location;
shaDow.Size = size;
shaDow.Show();
}
// Handle mouse down; Start check for "mouse up" or "mouse leave parent container"
protected override void OnMouseDown(MouseEventArgs mouseEventArgs)
{
this.onSelectDragEvent(this.Name);
// Continue?
if (mouseEventArgs.Button != MouseButtons.Left)
{
return;
}
// Save coordinates for later use (at "mouse up" or "drop")
startPoint = new Point(mouseEventArgs.X, mouseEventArgs.Y);
this.IsFirstClickDrag = true;
// Show the outline object
ShaDowControl.Show(this.PointToScreen(new Point(mouseEventArgs.X - startPoint.X - 2, mouseEventArgs.Y - startPoint.Y - 2)), this.Size);
// Register the mouse move handler
this.MouseMove -= new MouseEventHandler(DragItem_MouseMove);
this.MouseMove += new MouseEventHandler(DragItem_MouseMove);
base.OnMouseDown(mouseEventArgs);
}
// Handle mouse-move; If we are out of parent container then perform global drag
protected void DragItem_MouseMove(object sender, MouseEventArgs mouseEventArgs)
{
if (this.IsFirstClickDrag)
{
this.Cursor = Cursors.NoMove2D;
}
// Get the current mouse coordinates as screen coordinates
Point pMin = new Point((mouseEventArgs.X - startPoint.X), (mouseEventArgs.Y - startPoint.Y));
Point pMax = new Point(mouseEventArgs.X + this.Width, mouseEventArgs.Y + this.Height);
Point minPoint = this.PointToScreen(pMin);
Point maxPoint = new Point(minPoint.X + this.Width, minPoint.Y + this.Height);
this.IsOutSide = (Parent as DragContainer).IsCursorOutside(minPoint, maxPoint);
// Have we left the parent container?
if (this.IsOutSide == true)
{
// Unregister this event
this.MouseMove -= new MouseEventHandler(DragItem_MouseMove);
ShaDowControl.Hide();
// Hide the outline object
// ShaDowControl.SetBackColor(Color.Red);
// ShaDowControl.Move(this.PointToScreen(new Point(mouseEventArgs.X - startPoint.X, mouseEventArgs.Y - startPoint.Y)));
// Do start the drag-drop action
this.DoDragDrop(this, DragDropEffects.Move);
}
else
{
ShaDowControl.SetBackColor(Color.Black);
// Move the outline object
ShaDowControl.Move(this.PointToScreen(new Point(mouseEventArgs.X - startPoint.X, mouseEventArgs.Y - startPoint.Y)));
}
}
