学习windows编程 day4 之 设置画刷

LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    HDC hdc;
    PAINTSTRUCT ps;
    RECT rect;
    static HBRUSH hBrush, hOldBrush;
    switch (message)
    {
    case WM_PAINT:
        hdc = BeginPaint(hwnd, &ps);
        GetClientRect(hwnd, &rect);
//系统画刷数共有11个
//画刷是使用8X8像素的位图进行填充的，而不是像素点。效率高
        //获取系统画刷（不要用deleteObject删除）
        //hBrush=GetStockObject(LTGRAY_BRUSH);//浅灰色
        //hBrush = GetStockObject(NULL_BRUSH);//不设置画刷，则是不进行填充

        //设置自定义画刷createSolidBrush,createHatchBrush,createBrushIndirect
        //hBrush=CreateSolidBrush(RGB(255,255,0));
        //hBrush = CreateHatchBrush(HS_BDIAGONAL, RGB(0, 255, 0));//数字是样式 查手册
        LOGBRUSH bh[];
        for (int i = ; i < ; i++)
        {
            bh[i].lbStyle = BS_HATCHED;
            bh[i].lbHatch = i;
            bh[i].lbColor = RGB(i * 4, , );
        }

        //最后一个是系统画刷，不需要删除
        bh[].lbStyle = BS_SOLID;
        bh[].lbColor = RGB(, , );

        //用于记录所需要删除的画刷
        HBRUSH TotBrush[];

        //绘制6个矩形，填充不同
        for (int i = ; i < ;i++)
        {
            hBrush=CreateBrushIndirect(&bh[i]);
            if (i < )
                TotBrush[i] = hBrush;
            SelectObject(hdc, hBrush);
            Rectangle(hdc,  +  * i, ,  +  * i, );
        }

        for (int i = ; i < ;i++)
        {
            DeleteObject(TotBrush[i]);
        }

        //替换画刷
//        hOldBrush = SelectObject(hdc, hBrush);
        //中间写字
//         SetTextAlign(hdc,TA_CENTER);
//         TextOut(hdc, rect.right / 2, rect.bottom / 2, L"this a test", 11);
//         SetTextAlign(hdc, TA_LEFT);
//         Ellipse(hdc, rect.right / 4, rect.bottom / 4 , rect.right * 3 / 4, rect.bottom * 3 / 4);

        SelectObject(hdc, hOldBrush);
        EndPaint(hwnd, &ps);
        break;
    case WM_DESTROY:
        //DeleteObject(hBrush);//必须是自定义画刷
        PostQuitMessage();
        return ;
    }

    return DefWindowProc(hwnd, message, wParam, lParam);
}