默认NCPaint会覆盖Windows 8或更高版本中的自定义绘制 [英] Default NCPaint overrides custom painting in Windows 8 or higher

问题描述

我想在标题栏的角落画一个矩形。如果在我的绘画之前调用默认框架非客户端绘制，我无法在Windows 8或更高版本的标题栏上看到矩形。但是，同样适用于Windows 7.如果我在下面的NCPaint中注释
的Default（）方法，那么我可以在标题栏上看到绘制的矩形。以下是代码：

I want to draw a rectangle in the corner of the title bar. I am unable to see the Rectangle on title bar in Windows 8 or higher if default framework non client paint is called before my painting. However, the same works fine with Windows 7. If I comment the Default() method inside NCPaint below then I can see the rectangle drawn on title bar. Here is the code:

void CCustomDlg :: OnNcPaint（）

{

//如果您只更改菜单栏，请让框架首先绘制&bbsp
//窗口

默认（）;
$


CWindowDC dc（this）;

CRect rc;

GetWindowRect（rc）;
$


//菜单栏（非客户区）的大小较小

rc.bottom = GetSystemMetrics（SM_CYCAPTION） + GetSystemMetrics（SM_CYFRAME）;
$


//按钮区域

CRect closeRect;

closeRect.left = rc。 right - rc.left - 20;

closeRect.top = GetSystemMetrics（SM_CYFRAME）;

void CCustomDlg::OnNcPaint()
{
// If you only change the menu bar, let the framework draw 
// the window first
Default();

CWindowDC dc(this);
CRect rc;
GetWindowRect(rc);

// Size of menu bar (non-client area) is smaller
rc.bottom = GetSystemMetrics(SM_CYCAPTION) + GetSystemMetrics(SM_CYFRAME);

// Area for buttons
CRect closeRect;
closeRect.left = rc.right - rc.left - 20;
closeRect.top = GetSystemMetrics(SM_CYFRAME);

        closeRect.right = rc.right - rc.left - 5;

closeRect.bottom = GetSystemMetrics（SM_CYSIZE）;



//绘制矩形 

CBrush br;

COLORREF clr（RGB（255,0,0））;

br.CreateSolidBrush（clr）;

dc.FillRect(closeRect,&brie);



ReleaseDC（& dc）;

}

        closeRect.right = rc.right - rc.left - 5;
closeRect.bottom = GetSystemMetrics(SM_CYSIZE);

// draw rectangle 
CBrush br;
COLORREF clr(RGB(255,0,0));
br.CreateSolidBrush(clr);
dc.FillRect(closeRect, &br);

ReleaseDC(&dc);
}

如果我按框架评论默认的NC绘图，那么不同主题的帧有差异。我希望我的绘图后面的默认NC绘图在Windows 8或更高版本中可以正常工作，就像Windows 7一样。请建议。

If I comment the default NC drawing by framework then there is difference in the frames in different themes. I would like the default NC drawing followed by my drawing to work fine in Windows 8 or higher which is the case with Windows 7. Please suggest.

推荐答案

没有评论默认？如果我在NCPaint开始时没有评论Default方法调用，我就无法看到它。

Without commenting Default? I am not able to see it if I dont comment Default method call at the begining of NCPaint.

有没有更简单的方法来解决这个问题？

Is there a simpler way of resolving this issue?

我也看到了  GetSysColor（COLOR_ACTIVECAPTION）的问题。应用Windows主题时，这不会返回Windows 10中的默认白色背景。它适用于高对比度主题。

Also I see problem with GetSysColor(COLOR_ACTIVECAPTION). This does not return the default white background in Windows 10 when the Windows theme is applied. It works with high contrast themes though.

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