private void Object_MouseDown(object sender, MouseEventArgs e)
{
_mouseDownCursorPosition = Cursor.Position;
_mouseDownWindowPosition = new Point(Left, Top);
_mouseDownWindowSize = Size;
_mouseDownBorder = MouseBorder.Unset;
(sender as Control).Cursor = Cursors.Default;
}
private void Object_MouseMove(object sender, MouseEventArgs e)
{
var ctrl = sender as Control;
bool isBtn = sender is Button;
bool isCollectMouseBtn = e.Button == MouseButtons.Left;
if (isBtn)
{
isCollectMouseBtn = e.Button == MouseButtons.Right;
}
// cursor
if (e.Button == MouseButtons.None || _mouseDownBorder == MouseBorder.Unset)
{
if (isBtn)
{
_mouseDownBorder = MouseBorder.None;
ctrl.Cursor = Cursors.Default;
}
else
{
var p = Cursor.Position;
bool inX = p.X >= Left && p.X <= Left + Width;
bool inY = p.Y >= Top && p.Y <= Top + Height;
bool onN = inX && p.Y >= Top - BORDER_SIZE && p.Y <= Top + BORDER_SIZE;
bool onS = inX && p.Y >= Top + Height - BORDER_SIZE && p.Y <= Top + Height + BORDER_SIZE;
bool onW = inY && p.X >= Left - BORDER_SIZE && p.X <= Left + BORDER_SIZE;
bool onE = inY && p.X >= Left + Width - BORDER_SIZE && p.X <= Left + Width + BORDER_SIZE;
if (onN)
{
_mouseDownBorder = MouseBorder.N;
ctrl.Cursor = Cursors.SizeNS;
}
else if (onS)
{
_mouseDownBorder = MouseBorder.S;
ctrl.Cursor = Cursors.SizeNS;
}
else if (onW)
{
_mouseDownBorder = MouseBorder.W;
ctrl.Cursor = Cursors.SizeWE;
}
else if (onE)
{
_mouseDownBorder = MouseBorder.E;
ctrl.Cursor = Cursors.SizeWE;
}
else
{
_mouseDownBorder = MouseBorder.None;
ctrl.Cursor = Cursors.Default;
}
}
}
// move & resize
if (isCollectMouseBtn)
{
int newTop = _mouseDownWindowPosition.Y + Cursor.Position.Y - _mouseDownCursorPosition.Y;
int newLeft = _mouseDownWindowPosition.X + Cursor.Position.X - _mouseDownCursorPosition.X;
int newHeightN = _mouseDownWindowSize.Height + _mouseDownCursorPosition.Y - Cursor.Position.Y;
int newHeightS = _mouseDownWindowSize.Height - _mouseDownCursorPosition.Y + Cursor.Position.Y;
int newWidthW = _mouseDownWindowSize.Width + _mouseDownCursorPosition.X - Cursor.Position.X;
int newWidthE = _mouseDownWindowSize.Width - _mouseDownCursorPosition.X + Cursor.Position.X;
switch (_mouseDownBorder)
{
case MouseBorder.None:
Top = newTop;
Left = newLeft;
ctrl.Cursor = Cursors.SizeAll;
break;
case MouseBorder.N:
int minHeight = MinimumSize.Height, maxHeight = MaximumSize.Height;
if ((minHeight == 0 || newHeightN > minHeight) && (maxHeight == 0 || newHeightN < maxHeight))
{
Top = newTop;
Height = newHeightN;
}
break;
case MouseBorder.S:
Height = newHeightS;
break;
case MouseBorder.W:
int minWidth = MinimumSize.Width, maxWidth = MaximumSize.Width;
if ((minWidth == 0 || newWidthW > minWidth) && (maxWidth == 0 || newWidthW < maxWidth))
{
Left = newLeft;
Width = newWidthW;
}
break;
case MouseBorder.E:
Width = newWidthE;
break;
}
}
}
private void Object_MouseUp(object sender, MouseEventArgs e)
{
_mouseDownBorder = MouseBorder.Unset;
(sender as Control).Cursor = Cursors.Default;
}