Introduction
I build this control to enables me to moving this form when I
make the form border style = none
Background
the problem we faces is when we need to build none rectangle form . to do this we but picture on form and make its border style = none
in this case we need to handle how we can change form postion on screen using mouse .
i solve this by build custom control adding this future to the form when we but the control on it
Using the code
At first to enable moving the form with mouse moving we need
to handle 3 events first one is when mouse button is pressed (Parent_MouseDown)
second when mouse moving + mouse button is pressed (Parent_MouseMove )last one
when releasing mouse button (Parent_MouseUp)
Sample control code is :
public partial class HandelFormMove : Control
{
private
Point mouseOffset;
private
bool isMouseDown = false;
System.Windows.Forms.Form fr;
public
HandelFormMove()
{
InitializeComponent();
}
protected
override void
OnPaint(PaintEventArgs pe)
{
// TODO:
Add custom paint code here
//
Calling the base class OnPaint
//
base.OnPaint(pe);
}
/// <summary>
/// Initialize Form Moving
by initialize the from postion
/// And Set The Flage (isMouseDown) = true
/// to Enable Moving Form With Mouse Moving
/// </summary>
/// <param
name="sender"></param>
/// <param
name="e"></param>
private
void Parent_MouseDown(object
sender, MouseEventArgs e)
{
int
xOffset;
int
yOffset;
//
MessageBox.Show("click");
if
(e.Button == MouseButtons.Left)
{
//
Assign coordinates to mouseOffset variable based on
//
current position of the mouse pointer.
xOffset = -e.X - SystemInformation.FrameBorderSize.Width;
yOffset = -e.Y - SystemInformation.CaptionHeight -
SystemInformation.FrameBorderSize.Height;
mouseOffset = new Point(xOffset,
yOffset);
isMouseDown = true;
}
}
/// <summary>
/// check the flage (isMouseDown) if it is true
/// change form postion acording to mouse postion
/// </summary>
/// <param
name="sender"></param>
/// <param
name="e"></param>
private
void Parent_MouseMove(object
sender, MouseEventArgs e)
{
// If the
left mouse is held down.
if
(isMouseDown)
{
//
Set the form's location property to the new position.
Point
mousePos = Control.MousePosition;
mousePos.Offset(mouseOffset.X,
mouseOffset.Y);
fr.Location = mousePos;
}
}
/// <summary>
/// finalize Form Moving
/// by Seting The Flage (isMouseDown) = false
/// to disable Moving Form With Mouse Moving
/// </summary>
/// <param
name="sender"></param>
/// <param
name="e"></param>
private
void Parent_MouseUp(object
sender, MouseEventArgs e)
{
//
Changes the isMouseDown field so that the form does
// not
move unless the user is pressing the left mouse button.
if
(e.Button == MouseButtons.Left)
{
isMouseDown = false;
}
}
/// <summary>
///
/// </summary>
protected
override void
OnCreateControl()
{
//base.OnCreateControl();
fr = (System.Windows.Forms.Form)this.Parent;
fr.MouseDown += new MouseEventHandler(Parent_MouseDown);
fr.MouseMove += new MouseEventHandler(Parent_MouseMove);
fr.MouseUp += new MouseEventHandler(Parent_MouseUp);
this.Visible
= false;
}
}
