1
private bool _mouseDown;2
private bool _busy;3
private int _downX;4
private int _downY;5
6
private void lblTitle_MouseDown(object sender, MouseEventArgs e)7
{8
if (e.Button==MouseButtons.Left)9
{10
if (!this._busy)11
{12
try13
{14
this._busy = true;15
this._mouseDown = true;16
17
this._downX = e.X;18
this._downY = e.Y;19
}20
catch (Exception)21
{22
throw;23
}24
finally 25
{26
_busy = false;27
}28
29
}30
31
}32
33
}34
private void lblTitle_MouseEnter(object sender, EventArgs e)35
{36
this._mouseDown = false;37
}38
private void lblTitle_MouseLeave(object sender, EventArgs e)39
{40
this._mouseDown = false;41
}42
private void lblTitle_MouseMove(object sender, MouseEventArgs e)43
{44
if (this._mouseDown)45
{46
if (!_busy)47
{48
try 49
{50
int offsetX = e.X - _downX;51
int offsetY = e.Y - _downY;52
53
this.Top += offsetY;54
this.Left += offsetX;55
}56
catch 57
{58
throw;59
}60
finally 61
{62
this._busy = false;63
}64
}65
}66
}67
private void lblTitle_MouseUp(object sender, MouseEventArgs e)68
{69
this._mouseDown = false;70
this._busy = false;71
}
