基于MFC控件STATIC显示图片数据

来源：互联网发布：种族歧视数据编辑：程序博客网时间：2024/05/18 01:19

基于MFC控件STATIC显示图片数据

1. 在 OnInitDialog 中加入

GetDlgItem(IDC_MY_PIC)->ModifyStyle ( SS_TYPEMASK, SS_OWNERDRAW );

2. 在butto 按钮中加入以下，可以显示多中类型的图片资源

void CDlgpicDlg::OnTest()

{

// TODO: Add your command handler code here

CFileDialog fileDlg(TRUE,NULL,NULL,

OFN_ALLOWMULTISELECT,

_T("Picture Files (*.bmp *.ico *.jpg)|*bmp;*.ico;*jpg|All Files (*.*)|*.*||"),

AfxGetMainWnd());

CString pathName;

if(fileDlg.DoModal ()==IDOK)

{

POSITION mPos=fileDlg.GetStartPosition();

while(mPos!=NULL)

{

pathName=fileDlg.GetNextPathName(mPos);

if(m_pict.LoadPicture(pathName.GetBuffer(pathName.GetLength())))

{

// 防止有透明图片，消除已有的图片信息

CPaintDC dc(this); // device context for painting

CRect rc;

GetDlgItem(IDC_MY_PIC)->GetWindowRect(&rc);

dc.FillSolidRect(rc, RGB(0, 0, 0));

Invalidate();

}

3.给父窗口增加ON_WM_DRAWITEM消息映射函数在OnDrawItem(int nIDCtl, LPDRAWITEMSTRUCT lpDrawItemStruct)消息映射函数里面绘制控件

void CDlgpicDlg::OnDrawItem(int nIDCtl, LPDRAWITEMSTRUCT lpDrawItemStruct)

{

// TODO: Add your message handler code here and/or call default

if(nIDCtl == IDC_MY_PIC)

{

if ( m_pict.m_pic)

{

RECT rect;

TRACE("--hell-- test---");

HWND hwnd = ::GetDlgItem(this->GetSafeHwnd(), IDC_MY_PIC);

HDC hDC = ::GetDC(::GetDlgItem(this->GetSafeHwnd(),IDC_MY_PIC));

//Get the DC for the CPicture Box

::GetClientRect(::GetDlgItem(this->GetSafeHwnd(), IDC_MY_PIC), &rect);

//Get dimensions of it

m_pict.DrawPicture(hDC, 0, 0, rect.right - rect.left ,rect.bottom - rect.top );

::ReleaseDC(::GetDlgItem(this->GetSafeHwnd(),IDC_MY_PIC), hDC);

}

CDialog::OnDrawItem(nIDCtl, lpDrawItemStruct);

}

总结：如果在static中需要显示图片，在ONPAINT 中绘画没有效果，需要这么画：

1）给static控件增加SS_OWNERDRAW属性 GetDlgItem(IDC_MY_PIC)->ModifyStyle ( SS_TYPEMASK, SS_OWNERDRAW );

2）给父窗口增加ON_WM_DRAWITEM消息映射函数

3）在OnDrawItem(int nIDCtl, LPDRAWITEMSTRUCT lpDrawItemStruct)消息映射函数里面绘制控件

例如：下面给对话框里的IDC_STATIC_DRAW控件画个蓝色的背景

void CMyDlg::OnDrawItem(int nIDCtl, LPDRAWITEMSTRUCT lpDrawItemStruct)

{

if(nIDCtl == IDC_STATIC_DRAW)

{

CDC *pDC = CDC::FromHandle(lpDrawItemStruct->hDC);

pDC->FillSolidRect(10, 10, lpDrawItemStruct->rcItem.right - 20, lpDrawItemStruct->rcItem.bottom - 20, RGB(0, 0, 255));

return;

}

CDialog::OnDrawItem(nIDCtl, lpDrawItemStruct);

}

另外，还可以这么画

从CStatic继承一个新类，然后增加WM_PAINT消息处理，在OnPaint里面画

例如：

class CMyStatic : public CStatic

{

...

afx_msg void OnPaint();

};

void CMyStatic::OnPaint()

{

CPaintDC dc(this); // device context for painting

CRect rc;

GetClientRect(rc);

dc.FillSolidRect(rc, RGB(0, 0, 255));

}