private void RenderStyle(ref Message m)
{
base.WndProc(ref m);
if (!Natives.CanRender())
{
return;
}
int partId = Natives.EP_EDITTEXT;
int stateId;
if (this.Enabled)
{
stateId = this.ReadOnly ? Natives.ETS_READONLY : Natives.ETS_NORMAL;
}
else
{
stateId = Natives.ETS_DISABLED;
}
RECT windowRect;
Natives.GetWindowRect(this.Handle, out windowRect);
windowRect.Right -= windowRect.Left;
windowRect.Bottom -= windowRect.Top;
windowRect.Top = 0;
windowRect.Left = 0;
IntPtr hDC = Natives.GetWindowDC(this.Handle);
RECT clientRect = windowRect;
clientRect.Left += this._border.Left;
clientRect.Top += this._border.Top;
clientRect.Right -= this._border.Right;
clientRect.Bottom -= this._border.Bottom;
Natives.ExcludeClipRect(hDC, clientRect.Left, clientRect.Top, clientRect.Right, clientRect.Bottom);
IntPtr hTheme = Natives.OpenThemeData(this.Handle, "EDIT");
if (Natives.IsThemeBackgroundPartiallyTransparent(hTheme, Natives.EP_EDITTEXT, Natives.ETS_NORMAL) != 0)
{
Natives.DrawThemeParentBackground(this.Handle, hDC, ref windowRect);
}
Natives.DrawThemeBackground(hTheme, hDC, partId, stateId, ref windowRect, IntPtr.Zero);
Natives.CloseThemeData(hTheme);
Natives.ReleaseDC(this.Handle, hDC);
m.Result = IntPtr.Zero;
}
private void CalculateSize(ref Message m)
{
base.WndProc(ref m);
if (!Natives.CanRender())
{
return;
}
Natives.NCCALCSIZE_PARAMS par = new Natives.NCCALCSIZE_PARAMS();
RECT windowRect;
if (m.WParam == IntPtr.Zero)
{
windowRect = (RECT)Marshal.PtrToStructure(m.LParam, typeof(RECT));
}
else
{
par = (Natives.NCCALCSIZE_PARAMS)Marshal.PtrToStructure(m.LParam, typeof(Natives.NCCALCSIZE_PARAMS));
windowRect = par.rgrc0;
}
RECT contentRect;
IntPtr hDC = Natives.GetWindowDC(this.Handle);
IntPtr hTheme = Natives.OpenThemeData(this.Handle, "EDIT");
if (Natives.GetThemeBackgroundContentRect(hTheme, hDC, Natives.EP_EDITTEXT, Natives.ETS_NORMAL, ref windowRect, out contentRect) == Natives.S_OK)
{
contentRect.Inflate(-1, -1);
this._border = new Margins(contentRect.Left - windowRect.Left,
contentRect.Top - windowRect.Top,
windowRect.Right - contentRect.Right,
windowRect.Bottom - contentRect.Bottom);
if (m.WParam == IntPtr.Zero)
{
Marshal.StructureToPtr(contentRect, m.LParam, false);
}
else
{
par.rgrc0 = contentRect;
Marshal.StructureToPtr(par, m.LParam, false);
}
m.Result = new IntPtr(Natives.WVR_REDRAW);
}
Natives.CloseThemeData(hTheme);
Natives.ReleaseDC(this.Handle, hDC);
}