大家好。我想知道如何在 C# 中制作一个“透明”的 GUI。现在我不是在谈论透明度键等。
我想制作一个使用 vistas 航空主题的窗口，但我只是希望它显示更多的 seethru 航空外观，而不是表单中的控件。我还想从窗口中删除所有按钮、图标和文本。我该怎么做？
编辑...我找到了我想要创建的完美示例。在 vista 上加载 windows 移动中心。我怎样才能创建这样的东西，但没有盒子。
【问题讨论】：
标签： c# user-interface transparency
如何进入您的客户区
这是我几年前为我们的 Windows 应用程序执行此操作时使用的 API。
查看方法 ExtendGlassIntoClientArea(Form form, int leftMargin, int topMargin, int rightMargin, int bottomMargin)
using System;
using System.Drawing;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace UserInterface
{
public enum TextStyle
{
Normal,
Glowing
}
public static class Glass
{
[DllImport("dwmapi.dll")]
private static extern void DwmIsCompositionEnabled(ref bool pfEnabled);
[DllImport("dwmapi.dll")]
private static extern void DwmExtendFrameIntoClientArea(IntPtr hWnd, ref MARGINS pMargins);
[DllImport("gdi32.dll", ExactSpelling = true, SetLastError = true)]
private static extern IntPtr CreateCompatibleDC(IntPtr hDC);
[DllImport("gdi32.dll", ExactSpelling = true)]
private static extern IntPtr SelectObject(IntPtr hDC, IntPtr hObject);
[DllImport("gdi32.dll", ExactSpelling = true, SetLastError = true)]
private static extern bool DeleteObject(IntPtr hObject);
[DllImport("gdi32.dll", ExactSpelling = true, SetLastError = true)]
private static extern bool DeleteDC(IntPtr hdc);
[DllImport("gdi32.dll")]
private static extern bool BitBlt(IntPtr hdc, int nXDest, int nYDest, int nWidth, int nHeight, IntPtr hdcSrc, int nXSrc, int nYSrc, uint dwRop);
[DllImport("UxTheme.dll", CharSet = CharSet.Unicode)]
private static extern int DrawThemeTextEx(IntPtr hTheme, IntPtr hdc, int iPartId, int iStateId, string text, int iCharCount, int dwFlags, ref RECT pRect, ref DTTOPTS pOptions);
[DllImport("gdi32.dll")]
static extern IntPtr CreateDIBSection(IntPtr hdc, [In] ref BITMAPINFO pbmi, uint iUsage, out IntPtr ppvBits, IntPtr hSection, uint dwOffset);
[StructLayout(LayoutKind.Sequential)]
private struct DTTOPTS
{
public int dwSize;
public int dwFlags;
public int crText;
public int crBorder;
public int crShadow;
public int iTextShadowType;
public POINT ptShadowOffset;
public int iBorderSize;
public int iFontPropId;
public int iColorPropId;
public int iStateId;
public bool fApplyOverlay;
public int iGlowSize;
public int pfnDrawTextCallback;
public IntPtr lParam;
}
private const int DTT_COMPOSITED = 8192;
private const int DTT_GLOWSIZE = 2048;
private const int DTT_TEXTCOLOR = 1;
[StructLayout(LayoutKind.Sequential)]
private struct POINT
{
public POINT(int x, int y)
{
this.x = x;
this.y = y;
}
public int x;
public int y;
}
[StructLayout(LayoutKind.Sequential)]
private class BITMAPINFO
{
public int biSize;
public int biWidth;
public int biHeight;
public short biPlanes;
public short biBitCount;
public int biCompression;
public int biSizeImage;
public int biXPelsPerMeter;
public int biYPelsPerMeter;
public int biClrUsed;
public int biClrImportant;
public byte bmiColors_rgbBlue;
public byte bmiColors_rgbGreen;
public byte bmiColors_rgbRed;
public byte bmiColors_rgbReserved;
}
[StructLayout(LayoutKind.Sequential)]
private struct MARGINS
{
public int left, right, top, bottom;
}
[StructLayout(LayoutKind.Sequential)]
private struct RECT
{
public int Left;
public int Top;
public int Right;
public int Bottom;
public RECT(int left, int top, int right, int bottom)
{
Left = left;
Top = top;
Right = right;
Bottom = bottom;
}
public RECT(Rectangle rectangle)
{
Left = rectangle.X;
Top = rectangle.Y;
Right = rectangle.Right;
Bottom = rectangle.Bottom;
}
public Rectangle ToRectangle()
{
return new Rectangle(Left, Top, Right - Left, Bottom - Top);
}
public override string ToString()
{
return "Left: " + Left + ", " + "Top: " + Top + ", Right: " + Right + ", Bottom: " + Bottom;
}
}
public static bool IsCompositionEnabled
{
get
{
if (Environment.OSVersion.Version.Major < 6)
return false;
bool compositionEnabled = false;
DwmIsCompositionEnabled(ref compositionEnabled);
return compositionEnabled;
}
}
public static void ExtendGlassIntoClientArea(Form form, int leftMargin, int topMargin, int rightMargin, int bottomMargin)
{
MARGINS m = new MARGINS();
m.left = leftMargin;
m.right = rightMargin;
m.top = topMargin;
m.bottom = bottomMargin;
DwmExtendFrameIntoClientArea(form.Handle, ref m);
}
public static void DrawText(Graphics graphics, string text, Font font, Rectangle bounds, Color color, TextFormatFlags flags)
{
DrawText(graphics, text, font, bounds, color, flags, TextStyle.Normal);
}
public static void DrawText(Graphics graphics, string text, Font font, Rectangle bounds, Color color, TextFormatFlags flags, TextStyle textStyle)
{
IntPtr primaryHdc = graphics.GetHdc();
// Create a memory DC so we can work offscreen
IntPtr memoryHdc = CreateCompatibleDC(primaryHdc);
// Create a device-independent bitmap and select it into our DC
BITMAPINFO info = new BITMAPINFO();
info.biSize = Marshal.SizeOf(info);
info.biWidth = bounds.Width;
info.biHeight = -bounds.Height;
info.biPlanes = 1;
info.biBitCount = 32;
info.biCompression = 0; // BI_RGB
int ppvBits;
IntPtr dib = CreateDIBSection(primaryHdc, ref info, 0, out ppvBits, IntPtr.Zero, 0);
SelectObject(memoryHdc, dib);
// Create and select font
IntPtr fontHandle = font.ToHfont();
SelectObject(memoryHdc, fontHandle);
// Draw glowing text
System.Windows.Forms.VisualStyles.VisualStyleRenderer renderer = new System.Windows.Forms.VisualStyles.VisualStyleRenderer(System.Windows.Forms.VisualStyles.VisualStyleElement.Window.Caption.Active);
DTTOPTS dttOpts = new DTTOPTS();
dttOpts.dwSize = Marshal.SizeOf(typeof(DTTOPTS));
if (textStyle == TextStyle.Glowing)
{
dttOpts.dwFlags = DTT_COMPOSITED | DTT_GLOWSIZE | DTT_TEXTCOLOR;
}
else
{
dttOpts.dwFlags = DTT_COMPOSITED | DTT_TEXTCOLOR;
}
dttOpts.crText = ColorTranslator.ToWin32(color);
dttOpts.iGlowSize = 8; // This is about the size Microsoft Word 2007 uses
RECT textBounds = new RECT(0, 0, bounds.Right - bounds.Left, bounds.Bottom - bounds.Top);
DrawThemeTextEx(renderer.Handle, memoryHdc, 0, 0, text, -1, (int)flags, ref textBounds, ref dttOpts);
// Copy to foreground
const int SRCCOPY = 0x00CC0020;
BitBlt(primaryHdc, bounds.Left, bounds.Top, bounds.Width, bounds.Height, memoryHdc, 0, 0, SRCCOPY);
// Clean up
DeleteObject(fontHandle);
DeleteObject(dib);
DeleteDC(memoryHdc);
graphics.ReleaseHdc(primaryHdc);
}
}
}
【讨论】：
IntPtr dib = CreateDIBSection(primaryHdc, info, 0, 0, IntPtr.Zero, 0); 上收到 AccessViolationException。有什么想法吗？
DrawText的例子（你自己的方法）。
如果是 WPF，则需要打开透明度，并为背景设置正确的值（此外，WPF 本身就支持 AERO 用于边框等）。
对于传统的 winforms... 事情开始变得艰难。
【讨论】：
另外，windows 窗体的属性总是Form.Opacity。
【讨论】：