//redraw the control when text is changed
protected override void OnTextChanged(EventArgs e)
{
base.OnTextChanged(e);
if (IsGlassSupported)
{
Areo.InvalidateRect(Handle, (Areo.RECT)ClientRectangle, false);
}
}
//redraw the control When the mouse buttons are pressed
protected override void OnMouseDown(MouseEventArgs e)
{
base.OnMouseDown(e);
IsMouseDown = true;
if (IsGlassSupported)
{
Areo.InvalidateRect(Handle, (Areo.RECT)ClientRectangle, false);
}
}
//redraw when pressing the arrow keys
protected override void OnKeyDown(KeyEventArgs e)
{
base.OnKeyDown(e);
if (IsGlassSupported)
{
if (e.KeyCode == Keys.Up || e.KeyCode == Keys.Down || e.KeyCode == Keys.Left || e.KeyCode == Keys.Right)
{
Areo.InvalidateRect(Handle, (Areo.RECT)ClientRectangle, false);
}
}
}
public GlassTextBox()
{
IsGlassSupported = Areo.IsGlassSupported;
this.SetStyle(
ControlStyles.OptimizedDoubleBuffer |
ControlStyles.Selectable |
ControlStyles.StandardClick, true);
if (IsGlassSupported)
{
//we need to call this on every new thread to initialize the buffered painting
Areo.BufferedPaintInit();
}
}
//override the default WindowProc and hijack the WM_PAINT command
protected override void WndProc(ref Message m)
{
//let windows handle the message by default
base.WndProc(ref m);
if (IsGlassSupported)
{
if (m.Msg == Areo.WM_PAINT)
{
//create a graphics object for this control
Graphics gfx = this.CreateGraphics();
//obtain a handle to the native device contex
IntPtr hdc = gfx.GetHdc();
//create a empty device context
IntPtr BufferedDC = IntPtr.Zero;
//Cast the ClientRectangle to a native RECT
Areo.RECT ClientRect = (Areo.RECT)ClientRectangle;
//obtain the buffered device context from BeginBufferedPaint
IntPtr BuffDCHandle = Areo.BeginBufferedPaint(hdc, ref ClientRect, Areo.BP_BUFFERFORMAT.BPBF_TOPDOWNDIB, IntPtr.Zero, out BufferedDC);
//paint the client to the buffered device context
Areo.SendMessage(Handle, Areo.WM_PRINTCLIENT, BufferedDC, Areo.PRF_CLIENT);
//set the ALPHA level to fully opaque
Areo.BufferedPaintSetAlpha(BuffDCHandle, IntPtr.Zero, 255);
//end the buffered painting session
Areo.EndBufferedPaint(BuffDCHandle, true);
//release the controls device context handle
gfx.ReleaseHdc(hdc);
}
}
}