//绑定button的事件处理函数
void CloadfileDlg::OnBnClickedButton1()
{
//进度条置为零
//CProgressCtrl *prgs = (CProgressCtrl *)GetDlgItem(IDC_PROGRESS);
//prgs->SetPos(0);
//选择图片
CFileDialog fileDlg(TRUE, _T("png"), NULL, 0, _T("image Files(*.bmp; *.jpg;*.png)|*.JPG;*.PNG;*.BMP|All Files (*.*) |*.*||"), this);
fileDlg.DoModal();
//获取图片路径和图片名称
strFilePath = fileDlg.GetPathName();
strFileName = fileDlg.GetFileName();
//判断路径不为空
if (strFilePath == _T(""))
{
return;
}
CImage image;
image.Load(strFilePath);
//以下两个矩形主要作用是,获取对话框上面的Picture Control的width和height,
//并设置到图片矩形rectPicture,根据图片矩形rectPicture对图片进行处理,
//最后绘制图片到对话框上Picture Control上面
CRect rectControl; //控件矩形对象
CRect rectPicture; //图片矩形对象
int x = image.GetWidth();
int y = image.GetHeight();
//Picture Control的ID为IDC_IMAGE
CWnd *pWnd = GetDlgItem(IDC_IMAGE);
pWnd->GetClientRect(rectControl);
CDC *pDc = GetDlgItem(IDC_IMAGE)->GetDC();
SetStretchBltMode(pDc->m_hDC, STRETCH_HALFTONE);
rectPicture = CRect(rectControl.TopLeft(), CSize((int)rectControl.Width(), (int)rectControl.Height()));
((CStatic*)GetDlgItem(IDC_IMAGE))->SetBitmap(NULL);
//以下两种方法都可绘制图片
//image.StretchBlt(pDc->m_hDC, rectPicture, SRCCOPY); //将图片绘制到Picture控件表示的矩形区域
image.Draw(pDc->m_hDC, rectPicture); //将图片绘制到Picture控件表示的矩形区域
image.Destroy();
pWnd->ReleaseDC(pDc);
}
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