protected void RefreshFakeWnd()
{
if (m_bIsRefreshing)
{
return;
}
if (!NativeMethods.IsWindow(m_FakeWndHandle))
{
return;
}
m_bIsRefreshing = true;
POINT ptSrc = new POINT(0, 0);
POINT ptWinPos = new POINT(this.Left, this.Top);
SIZE szWin = new SIZE(m_BgImg.Width, m_BgImg.Height);
byte biAlpha = 0xFF;
BLENDFUNCTION stBlend = new BLENDFUNCTION(BlendOp.AC_SRC_OVER, 0, biAlpha, BlendOp.AC_SRC_ALPHA);
IntPtr hDC = NativeMethods.GetDC(m_FakeWndHandle);
if (hDC == IntPtr.Zero)
{
m_bIsRefreshing = false;
Debug.Assert(false, "GetDC failed.");
return;
}
IntPtr hdcMemory = NativeMethods.CreateCompatibleDC(hDC);
int nBytesPerLine = ((m_BgImg.Width * 32 + 31) & (~31)) >> 3;
BITMAPINFOHEADER stBmpInfoHeader = new BITMAPINFOHEADER();
stBmpInfoHeader.Init();
stBmpInfoHeader.biWidth = m_BgImg.Width;
stBmpInfoHeader.biHeight = m_BgImg.Height;
stBmpInfoHeader.biPlanes = 1;
stBmpInfoHeader.biBitCount = 32;
stBmpInfoHeader.biCompression = CompressionType.BI_RGB;
stBmpInfoHeader.biClrUsed = 0;
stBmpInfoHeader.biSizeImage = (uint)(nBytesPerLine * m_BgImg.Height);
IntPtr pvBits = IntPtr.Zero;
IntPtr hbmpMem = NativeMethods.CreateDIBSection(hDC
, ref stBmpInfoHeader
, DIBColorTableIdentifier.DIB_RGB_COLORS
, out pvBits
, IntPtr.Zero
, 0
);
Debug.Assert(hbmpMem != IntPtr.Zero, "CreateDIBSection failed.");
if (hbmpMem != null)
{
IntPtr hbmpOld = NativeMethods.SelectObject(hdcMemory, hbmpMem);
Graphics graphic = Graphics.FromHdcInternal(hdcMemory);
graphic.DrawImage(m_BgImg, 0, 0, m_BgImg.Width, m_BgImg.Height);
foreach (Control ctrl in this.Controls)
{
if (!ctrl.Visible)
{
continue;
}
using (Bitmap bmp = new Bitmap(ctrl.Width, ctrl.Height))
{
Rectangle rect = new Rectangle(0, 0, ctrl.Width, ctrl.Height);
ctrl.DrawToBitmap(bmp, rect);
graphic.DrawImage(bmp, ctrl.Left, ctrl.Top, ctrl.Width, ctrl.Height);
}
}
GUITHREADINFO stGuiThreadInfo = new GUITHREADINFO();
stGuiThreadInfo.Init();
if (NativeMethods.GetGUIThreadInfo((uint)NativeMethods.GetCurrentThreadId(), ref stGuiThreadInfo))
{
if (NativeMethods.IsWindow(stGuiThreadInfo.hwndCaret))
{
int height = stGuiThreadInfo.rcCaret.Bottom - stGuiThreadInfo.rcCaret.Top;
POINT ptCaret = new POINT(stGuiThreadInfo.rcCaret.Left, stGuiThreadInfo.rcCaret.Top);
NativeMethods.ClientToScreen(stGuiThreadInfo.hwndCaret, ref ptCaret);
NativeMethods.ScreenToClient(this.Handle, ref ptCaret);
graphic.DrawLine(new Pen(new SolidBrush(Color.Black))
, ptCaret.X
, ptCaret.Y
, ptCaret.X
, ptCaret.Y + height
);
}
}
NativeMethods.UpdateLayeredWindow(m_FakeWndHandle
, hDC
, ref ptWinPos
, ref szWin
, hdcMemory
, ref ptSrc
, 0
, ref stBlend
, UpdateLayerWindowParameter.ULW_ALPHA
);
graphic.Dispose();
NativeMethods.SelectObject(hbmpMem, hbmpOld);
NativeMethods.DeleteObject(hbmpMem);
}
NativeMethods.DeleteDC(hdcMemory);
NativeMethods.DeleteDC(hDC);
m_bIsRefreshing = false;
}
private void TrackDropDown(int index)
{
while (index >= 0)
{
this.trackNextItem = -1;
this.BeginUpdate();
CommandBarMenu menu = this.items[index] as CommandBarMenu;
if (menu != null)
{
menu.PerformDropDown(EventArgs.Empty);
this.contextMenu.Items.Clear();
this.contextMenu.Items.AddRange(menu.Items); // = menu.Items;
this.contextMenu.Mnemonics = true;
}
else
{
this.contextMenu.Items.Clear(); // .Items = new CommandBarItemCollection();
this.contextMenu.Mnemonics = true;
}
// Item state
NativeMethods.SendMessage(this.Handle, NativeMethods.TB_PRESSBUTTON, index, -1);
// Trick to get the first menu item selected
NativeMethods.PostMessage(this.Handle, NativeMethods.WM_KEYDOWN, (int)Keys.Down, 1);
NativeMethods.PostMessage(this.Handle, NativeMethods.WM_KEYUP, (int)Keys.Down, 1);
this.SetState(State.HotTracking, index);
// Hook
NativeMethods.HookProc hookProc = new NativeMethods.HookProc(DropDownHook);
GCHandle hookProcHandle = GCHandle.Alloc(hookProc);
this.hookHandle = NativeMethods.SetWindowsHookEx(NativeMethods.WH_MSGFILTER, hookProc, IntPtr.Zero, NativeMethods.GetCurrentThreadId());
if (this.hookHandle == IntPtr.Zero)
{
throw new SecurityException();
}
// Ask for position
NativeMethods.RECT rect = new NativeMethods.RECT();
NativeMethods.SendMessage(Handle, NativeMethods.TB_GETRECT, index, ref rect);
Point position = new Point(rect.left, rect.bottom);
this.EndUpdate();
this.Update();
this.contextMenu.Show(this, position);
// Unhook
NativeMethods.UnhookWindowsHookEx(hookHandle);
hookProcHandle.Free();
this.hookHandle = IntPtr.Zero;
// Item state
NativeMethods.SendMessage(Handle, NativeMethods.TB_PRESSBUTTON, index, 0);
this.SetState(trackEscapePressed ? State.Hot : State.None, index);
index = trackNextItem;
}
}