MFC图片自适应
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MFC图片自适应方法:
void CSimMachineLogin::OnPaint()
{
CPaintDC dc(this); // device context for painting
// TODO: 在此处添加消息处理程序代码
int height, width;
CRect rect;//定义矩形类
CRect rect1;
CImage image; //创建图片类
CString workPath = Common::GetAppInstallDir();
CString path = workPath + _T("\\logo.png");
image.Load(path);
height = image.GetHeight();
width = image.GetWidth();
p_PICTURE.GetClientRect(&rect); //获得pictrue控件所在的矩形区域
CDC *pDc = p_PICTURE.GetDC();//获得pictrue控件的Dc
SetStretchBltMode(pDc->m_hDC, STRETCH_HALFTONE);
if (width <= rect.Width() && height <= rect.Width()) //小图片,不缩放
{
rect1 = CRect(rect.TopLeft(), CSize(width, height));
image.StretchBlt(pDc->m_hDC, rect1, SRCCOPY); //将图片画到Picture控件表示的矩形区域
}
else
{
//float xScale = (float)rect.Width() / (float)width;
//float yScale = (float)rect.Height() / (float)height;
//float ScaleIndex = (xScale >= yScale) ? xScale : yScale;
//rect1 = CRect(rect.TopLeft(), CSize((int)width*ScaleIndex, (int)height*ScaleIndex));
//
CRect clientRect, tabRect;
this->GetClientRect(&clientRect); // 获取标签控件客户区Rect
tabRect.left = clientRect.left;
tabRect.right = clientRect.right;
tabRect.top = clientRect.top;
tabRect.bottom = clientRect.top + 0.45 * clientRect.Height();
p_PICTURE.MoveWindow(&tabRect);
tabRect.top = clientRect.top+30;
image.StretchBlt(pDc->m_hDC, tabRect, SRCCOPY); //将图片画到Picture控件表示的矩形区域
}
ReleaseDC(pDc);//释放picture控件的Dc
// 不为绘图消息调用 CDialogEx::OnPaint()
}
SYQ
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