设置控件随窗口大小而改变

第一步：在类中加入成员函数和成员变量

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public:

void SetControlInfo(WORD CtrlId);

protected:

int m_old_cx,m_old_cy;

CDWordArray m_control_info;

第二步 在类的构造函数中初始化变量

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CgdiDlg::CgdiDlg(CWnd* pParent /*=NULL*/)

: CDialog(CgdiDlg::IDD, pParent)

{

m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);

m_old_cx=m_old_cy=0;

}

注意： 是在类的构造函数中初始化，不是在类的Init函数中进行初始化

第三步 定义实现成员函数SetControlInfo(WORD CtrlId)

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void CgdiDlg::SetControlInfo(WORD CtrlId)

{

m_control_info.Add(CtrlId);

}

第四步 修改OnSize消息函数

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void CgdiDlg::OnSize(UINT nType, int cx, int cy)

{

if (cx==0||cy==0)

{

cx=800;

cy=600;

}

CDialog::OnSize(nType, cx, cy);

float dx_percent = (m_old_cx ==0)? 1 : (float)((float)cx/(float)m_old_cx);

float dy_percent = (m_old_cy ==0)? 1 : (float)((float)cy/(float)m_old_cy);

if(m_old_cx)

{

CRect WndRect;

CWnd *pWnd;

for(int i = 0; i < m_control_info.GetSize(); i++)

{

pWnd = GetDlgItem(m_control_info[i]);

if(!pWnd)

{

TRACE( "Control ID - %d NOT FOUND!!\n ",m_control_info[i]);

continue;

}

pWnd-> GetWindowRect(&WndRect);

ScreenToClient(&WndRect);

WndRect.left = (int)(WndRect.left*dx_percent);

WndRect.right = (int)(WndRect.right* dx_percent);

WndRect.bottom = (int)(WndRect.bottom*dy_percent);

WndRect.top = (int)(WndRect.top*dy_percent);

pWnd-> MoveWindow(&WndRect);

}

}

m_old_cx = cx;

m_old_cy = cy;

}

<第五步 在OnInitDialog初始化函数中 加入控件ID

SetControlInfo(IDC_BUTTON1);

参考资料："http://hi.baidu.com/jues17/blog/item/61d5a7ff289ae3265c60089c.html"