Exemplo n.º 1
0
 public static extern bool GetGUIThreadInfo(uint idThread, ref GUITHREADINFO lpgui);
Exemplo n.º 2
0
        protected void RefreshFakeWnd()
        {
            if (m_bIsRefreshing)
            {
                return;
            }

            if (!User32Dll.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 = User32Dll.GetDC(m_FakeWndHandle);

            if (hDC == IntPtr.Zero)
            {
                m_bIsRefreshing = false;
                Debug.Assert(false, "GetDC failed.");
                return;
            }

            IntPtr hdcMemory = GDI32Dll.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 = GDI32Dll.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 = GDI32Dll.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 (User32Dll.GetGUIThreadInfo(Kernal32Dll.GetCurrentThreadId(), ref stGuiThreadInfo))
                {
                    if (User32Dll.IsWindow(stGuiThreadInfo.hwndCaret))
                    {
                        int   height  = stGuiThreadInfo.rcCaret.Bottom - stGuiThreadInfo.rcCaret.Top;
                        POINT ptCaret = new POINT(stGuiThreadInfo.rcCaret.Left, stGuiThreadInfo.rcCaret.Top);

                        User32Dll.ClientToScreen(stGuiThreadInfo.hwndCaret, ref ptCaret);
                        User32Dll.ScreenToClient(this.Handle, ref ptCaret);

                        graphic.DrawLine(new Pen(new SolidBrush(Color.Black))
                                         , ptCaret.X
                                         , ptCaret.Y
                                         , ptCaret.X
                                         , ptCaret.Y + height
                                         );
                    }
                }


                User32Dll.UpdateLayeredWindow(m_FakeWndHandle
                                              , hDC
                                              , ref ptWinPos
                                              , ref szWin
                                              , hdcMemory
                                              , ref ptSrc
                                              , 0
                                              , ref stBlend
                                              , UpdateLayerWindowParameter.ULW_ALPHA
                                              );

                graphic.Dispose();
                GDI32Dll.SelectObject(hbmpMem, hbmpOld);
                GDI32Dll.DeleteObject(hbmpMem);
            }

            GDI32Dll.DeleteDC(hdcMemory);
            GDI32Dll.DeleteDC(hDC);

            m_bIsRefreshing = false;
        }