protected void DrawTransparentBackground(
IntPtr hDC, Rectangle bounds, Point offset)
{
if (base.Parent == null ||
!base.Parent.IsHandleCreated ||
base.Parent.IsDisposed)
{
return;
}
Size parentSize = base.Parent.ClientSize;
using (ImageDc imageDc = new ImageDc(parentSize.Width, parentSize.Height))
{
Win32.NativeMethods.SendMessage(
base.Parent.Handle,
WM.WM_ERASEBKGND,
imageDc.Hdc,
0);
Win32.NativeMethods.SendMessage(
base.Parent.Handle,
WM.WM_PAINT,
imageDc.Hdc,
0);
Win32.NativeMethods.BitBlt(
hDC,
bounds.X,
bounds.Y,
bounds.Width,
bounds.Height,
imageDc.Hdc,
offset.X,
offset.Y,
TernaryRasterOperations.SRCCOPY);
}
}
protected void DrawTransparentBackground(
IntPtr hDC, Rectangle bounds, Point offset)
{
if(base.Parent == null ||
!base.Parent.IsHandleCreated ||
base.Parent .IsDisposed)
{
return;
}
Size parentSize = base.Parent.ClientSize;
using (ImageDc imageDc = new ImageDc(parentSize.Width, parentSize.Height))
{
Win32.NativeMethods.SendMessage(
base.Parent.Handle,
WM.WM_ERASEBKGND,
imageDc.Hdc,
0);
Win32.NativeMethods.SendMessage(
base.Parent.Handle,
WM.WM_PAINT,
imageDc.Hdc,
0);
Win32.NativeMethods.BitBlt(
hDC,
bounds.X,
bounds.Y,
bounds.Width,
bounds.Height,
imageDc.Hdc,
offset.X,
offset.Y,
TernaryRasterOperations.SRCCOPY);
}
}
protected virtual void WmNcPaint(ref Message m)
{
IntPtr hDC = Win32.NativeMethods.GetWindowDC(m.HWnd);
if (hDC == IntPtr.Zero)
{
return;
}
try
{
Rectangle bounds = new Rectangle(Point.Empty, base.Size);
Rectangle client = base.ClientRectangle;
client.X = _borderWidth;
client.Y = _borderWidth;
using (ImageDc bufferedDC = new ImageDc(base.Width, base.Height))
{
Win32.NativeMethods.ExcludeClipRect(
bufferedDC.Hdc,
client.Left,
client.Top,
client.Right,
client.Bottom);
DrawTransparentBackground(
bufferedDC.Hdc,
bounds,
base.Location);
using (Graphics g = Graphics.FromHdc(bufferedDC.Hdc))
{
using (GraphicsPath path = GraphicsPathHelper.CreatePath(
bounds, _radius, _roundStyle, true))
{
g.SetClip(path);
}
g.ExcludeClip(client);
if (base.BackgroundImage != null)
{
ControlPaintEx.DrawBackgroundImage(
g,
base.BackgroundImage,
base.BackColor,
base.BackgroundImageLayout,
bounds,
bounds);
}
else if (base.BackColor != Color.Transparent)
{
using (Brush brush = new SolidBrush(base.BackColor))
{
g.FillRectangle(brush, bounds);
}
}
g.ResetClip();
using (GraphicsPath path = GraphicsPathHelper.CreatePath(
bounds, _radius, _roundStyle, true))
{
using ( SmoothingModeGraphics antiGraphics = new SmoothingModeGraphics(g))
{
g.DrawPath(Pens.Black, path);
}
}
}
Win32.NativeMethods.ExcludeClipRect(
hDC,
client.Left,
client.Top,
client.Right,
client.Bottom);
Win32.NativeMethods.BitBlt(
hDC,
bounds.X,
bounds.Y,
bounds.Width,
bounds.Height,
bufferedDC.Hdc,
0,
0,
TernaryRasterOperations.SRCCOPY);
}
}
catch
{
}
finally
{
Win32.NativeMethods.ReleaseDC(m.HWnd, hDC);
}
}
protected override void OnPaintBackground(PaintEventArgs e)
{
if (base.BackgroundImage != null)
{
Graphics g = e.Graphics;
Rectangle bounds = new Rectangle(Point.Empty,base.Size);
Rectangle clientRect = base.ClientRectangle;
WINDOWINFO info = GetWindowInfo();
Point offset = new Point(
info.rcClient.Left - info.rcWindow.Left,
info.rcClient.Top - info.rcWindow.Top);
IntPtr hDC = g.GetHdc();
try
{
using (ImageDc imageDc = new ImageDc(bounds.Width, bounds.Height))
{
using (Graphics gDc = Graphics.FromHdc(imageDc.Hdc))
{
ControlPaintEx.DrawBackgroundImage(
gDc,
base.BackgroundImage,
base.BackColor,
base.BackgroundImageLayout,
bounds,
bounds);
}
Win32.NativeMethods.BitBlt(
hDC,
clientRect.X,
clientRect.Y,
clientRect.Width,
clientRect.Height,
imageDc.Hdc,
offset.X,
offset.Y,
TernaryRasterOperations.SRCCOPY);
}
}
catch
{
}
finally
{
g.ReleaseHdc(hDC);
}
return;
}
if (base.BackColor == Color.Transparent)
{
Graphics g = e.Graphics;
IntPtr hDC = g.GetHdc();
try
{
WINDOWINFO info = GetWindowInfo();
Point offset = new Point(
info.rcClient.Left - info.rcWindow.Left,
info.rcClient.Top - info.rcWindow.Top);
offset += (Size)base.Location;
DrawTransparentBackground(
hDC,
base.ClientRectangle,
offset);
}
catch
{
}
finally
{
g.ReleaseHdc(hDC);
}
return;
}
base.OnPaintBackground(e);
}
protected virtual void WmNcPaint(ref Message m)
{
IntPtr hDC = Win32.NativeMethods.GetWindowDC(m.HWnd);
if (hDC == IntPtr.Zero)
{
return;
}
try
{
Rectangle bounds = new Rectangle(Point.Empty, base.Size);
Rectangle client = base.ClientRectangle;
client.X = _borderWidth;
client.Y = _borderWidth;
using (ImageDc bufferedDC = new ImageDc(base.Width, base.Height))
{
Win32.NativeMethods.ExcludeClipRect(
bufferedDC.Hdc,
client.Left,
client.Top,
client.Right,
client.Bottom);
DrawTransparentBackground(
bufferedDC.Hdc,
bounds,
base.Location);
using (Graphics g = Graphics.FromHdc(bufferedDC.Hdc))
{
using (GraphicsPath path = GraphicsPathHelper.CreatePath(
bounds, _radius, _roundStyle, true))
{
g.SetClip(path);
}
g.ExcludeClip(client);
if (base.BackgroundImage != null)
{
ControlPaintEx.DrawBackgroundImage(
g,
base.BackgroundImage,
base.BackColor,
base.BackgroundImageLayout,
bounds,
bounds);
}
else if (base.BackColor != Color.Transparent)
{
using (Brush brush = new SolidBrush(base.BackColor))
{
g.FillRectangle(brush, bounds);
}
}
g.ResetClip();
using (GraphicsPath path = GraphicsPathHelper.CreatePath(
bounds, _radius, _roundStyle, true))
{
using (SmoothingModeGraphics antiGraphics = new SmoothingModeGraphics(g))
{
g.DrawPath(Pens.Black, path);
}
}
}
Win32.NativeMethods.ExcludeClipRect(
hDC,
client.Left,
client.Top,
client.Right,
client.Bottom);
Win32.NativeMethods.BitBlt(
hDC,
bounds.X,
bounds.Y,
bounds.Width,
bounds.Height,
bufferedDC.Hdc,
0,
0,
TernaryRasterOperations.SRCCOPY);
}
}
catch
{
}
finally
{
Win32.NativeMethods.ReleaseDC(m.HWnd, hDC);
}
}
protected override void OnPaintBackground(PaintEventArgs e)
{
if (base.BackgroundImage != null)
{
Graphics g = e.Graphics;
Rectangle bounds = new Rectangle(Point.Empty, base.Size);
Rectangle clientRect = base.ClientRectangle;
WINDOWINFO info = GetWindowInfo();
Point offset = new Point(
info.rcClient.Left - info.rcWindow.Left,
info.rcClient.Top - info.rcWindow.Top);
IntPtr hDC = g.GetHdc();
try
{
using (ImageDc imageDc = new ImageDc(bounds.Width, bounds.Height))
{
using (Graphics gDc = Graphics.FromHdc(imageDc.Hdc))
{
ControlPaintEx.DrawBackgroundImage(
gDc,
base.BackgroundImage,
base.BackColor,
base.BackgroundImageLayout,
bounds,
bounds);
}
Win32.NativeMethods.BitBlt(
hDC,
clientRect.X,
clientRect.Y,
clientRect.Width,
clientRect.Height,
imageDc.Hdc,
offset.X,
offset.Y,
TernaryRasterOperations.SRCCOPY);
}
}
catch
{
}
finally
{
g.ReleaseHdc(hDC);
}
return;
}
if (base.BackColor == Color.Transparent)
{
Graphics g = e.Graphics;
IntPtr hDC = g.GetHdc();
try
{
WINDOWINFO info = GetWindowInfo();
Point offset = new Point(
info.rcClient.Left - info.rcWindow.Left,
info.rcClient.Top - info.rcWindow.Top);
offset += (Size)base.Location;
DrawTransparentBackground(
hDC,
base.ClientRectangle,
offset);
}
catch
{
}
finally
{
g.ReleaseHdc(hDC);
}
return;
}
base.OnPaintBackground(e);
}