Question

MFC OnSize不调用？

哪位大侠帮我看看为什么我在OnSize()里面的操作不管用，设断点发现好像OnSize()根本就没有调用，不可能吧，到底怎么回事呢？
代码如下：

// CFcModelingDlg dialog
class CFcModelingDlg : public CDialog
{
DECLARE_DYNAMIC(CFcModelingDlg)
public:
CFcModelingDlg(CWnd* pParent = NULL); // standard constructor
virtual ~CFcModelingDlg();
int m_dlgWidth;
int m_dlgHeight;
int m_width;
int m_height;
double m_multiWidth;
double m_multiHeight;
BOOL change_flag; //用来判断Onsize()执行时对话框是否已执行；初始化为false
// Dialog Data
enum { IDD = IDD_FC_MODELING };
protected:
virtual BOOL OnInitDialog();
virtual void OnSize(UINT nType, int cx, int cy);
virtual void ReSize(int nID);
DECLARE_MESSAGE_MAP()
CTabCtrl m_tabInfo;
CWtgList m_wtgList;
CSvcList m_svcList;
};

.cpp中

BOOL CFcModelingDlg::OnInitDialog()
{
CDialog::OnInitDialog();
m_tabInfo.InsertItem(0, "zz");
m_tabInfo.InsertItem(1, "aa");
//m_tabInfo.InsertItem(2, "bb");
//m_tabInfo.InsertItem(3, "cc");
//m_tabInfo.InsertItem(4, "dd");
m_wtgList.Create(IDD_DIALOG1, GetDlgItem(IDC_TAB_COMP_INFO));
m_svcList.Create(IDD_DIALOG2, GetDlgItem(IDC_TAB_COMP_INFO));

CRect rc;
m_tabInfo.GetClientRect(rc);
rc.top += 21;
rc.bottom -= 5;
rc.right += 5;
rc.left -= 5;
m_wtgList.MoveWindow(&rc);
m_svcList.MoveWindow(&rc);
m_wtgList.ShowWindow(true);
m_svcList.ShowWindow(false);
m_tabInfo.SetCurSel(0);

::GetWindowRect(m_hWnd, rc);
ScreenToClient(rc);

//对话框宽高
m_dlgWidth = rc.right - rc.left;
m_dlgHeight = rc.bottom - rc.top;

//屏幕分辨率
m_width = GetSystemMetrics(SM_CXSCREEN);
m_height = GetSystemMetrics(SM_CYSCREEN);

//放大倍数
m_multiWidth = (double)m_width/(double)m_dlgWidth;
m_multiHeight = (double)m_height/(double)m_dlgHeight;
change_flag = true;

//ShowWindow(SW_MAXIMIZE); //对话框以最大化方式弹出

return TRUE;
}
void CFcModelingDlg::OnSize(UINT nType, int cx, int cy)
{
CDialog::OnSize(nType, cx, cy);
if(change_flag)
{
ReSize(IDC_TAB_COMP_INFO);

//恢复放大倍数，并保存 (确保还原时候能够还原到原来的大小)
m_multiWidth = float(1)/m_multiWidth ;
m_multiHeight = float(1)/m_multiHeight ;
}
}

void CFcModelingDlg::ReSize(int nID)
{
CRect rect;
GetDlgItem(nID)->GetWindowRect(rect);
ScreenToClient(rect);
//计算控件左上角点
CPoint OldTLPoint, TLPoint;
OldTLPoint = rect.TopLeft();
TLPoint.x = long(OldTLPoint.x * m_multiWidth);
TLPoint.y = long(OldTLPoint.y * m_multiHeight);

//计算控件右下角点
CPoint OldBRPoint,BRPoint;
OldBRPoint = rect.BottomRight();
BRPoint.x = long(OldBRPoint.x *m_multiWidth);
BRPoint.y = long(OldBRPoint.y * m_multiHeight );

//移动控件到新矩形
rect.SetRect(TLPoint,BRPoint);
GetDlgItem(nID)->MoveWindow(rect,true);
}

Answer 1

消息映射 WM_SIZE 消息

BEGIN_MESSAGE_MAP(XXX, XXXX)

ON_WM_SIZE()
END_MESSAGE_MAP()

Answer 2

.h文件：
afx_msg void OnSize(UINT nType, int cx, int cy);

.cpp文件：
BEGIN_MESSAGE_MAP(CFcModelingDlg, CDialog)
ON_WM_SIZE()
END_MESSAGE_MAP()

void CFcModelingDlg::OnSize(UINT nType, int cx, int cy)
{
//处理
}