Resizing window not working properly MFC

Question

I have created a customized class with inheriting CDockablepane in SDI application MFC. for ex.

class CLoginPage :  public CDockablePane
{
    public:
    CLoginPage();
protected:
    CStatic lbl_username;
    CStatic lbl_password;
    CEdit txt_username;
    CEdit txt_password;
    CButton btn_login;
    CButton btn_Signup;
protected:
    afx_msg int OnCreate(LPCREATESTRUCT lpCreateStruct);
    afx_msg void OnSize(UINT nType, int cx, int cy);

    DECLARE_MESSAGE_MAP()
};

in .cpp I override oncreate function and onsize funtion

int CLoginPage::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
    if (CDockablePane::OnCreate(lpCreateStruct) == -1)
        return -1;

    if(!lbl_username.Create(_T("User Name"), WS_CHILD | WS_VISIBLE, CRect(150, 150, 100, 30), this, ID_STATIC_USERNAME))
    {
        TRACE0("Failed to create userName in LoginPage window\n");
        return -1;
    }
 ......................................same for other control
}


void CLoginPage::OnSize(UINT nType, int cx, int cy)
{
    CDockablePane::OnSize(nType, cx, cy);

    // Tab control should cover the whole client area:
    CRect rectClient;
    this->GetWindowRect(rectClient);

    lbl_username.SetWindowPos (NULL, rectClient.left+150, rectClient.top+150, 100, 30, SWP_NOMOVE | SWP_NOACTIVATE | SWP_NOZORDER);
.............................same for other control
}

when I run this it is displaying correctly as present in below image.

but after resize login window or move login window, it display very badly. please see below image

I don't know how to resolve this. Do I need to do something in WM_PAINT message or something else. I tried a lot but i din't get any option. Can someone please help me on this??

Not immediately clear, why you specify values for X and Y in your call to SetWindowPos even though you are telling the system, that it should ignore those values (SWP_NOMOVE). Anyway, your issue is one of these: 1 Your WM_PAINT message handler is buggy. 2 Your WM_ERASEBKGND message handler is inappropriate. 3 Your window class registration is missing the CS_HREDRAW/CS_VREDRAW window class styles. In other words: It's in the code we cannot see. Please show a minimal reproducible example. — IInspectable
I Have not handled WM_PAINT or WM_ERASEBKGND messages. How I called this Login window is present below: CString strLoginPageWnd; bNameValid = strLoginPageWnd.LoadString(IDS_LOGINPAGE_WND); ASSERT(bNameValid); if (!m_wndLoginPage.Create(strLoginPageWnd, this, CRect(0, 0, 200, 200), TRUE, ID_VIEW_LOGINPAGEWND, WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS | CBRS_TOP | CS_HREDRAW | CS_VREDRAW | CBRS_FLOAT_MULTI)) { TRACE0("Failed to create LoginPage window\n"); return FALSE; // failed to create }m_wndLoginPage.EnableDocking(CBRS_ALIGN_ANY); DockPane(&m_wndLoginPage); — NIKHIL
Where did you read, that you can mix window styles with class styles? CS_HREDRAW and CS_VREDRAW can only be used when registering a window class. — IInspectable

AnatolyS AnatolyS · Accepted Answer · 2016-07-11T09:28:41

You want to change position but why do you pass SWP_NOMOVE into SetWindowPos?

Do you know that in Visual Studio 2015 you have possibility to manage dialog layout with dynamic layouts: https://msdn.microsoft.com/en-us/library/mt270148.aspx ? The best dynamic layouts tutorial is http://mariusbancila.ro/blog/2015/07/27/dynamic-dialog-layout-for-mfc-in-visual-c-2015/

Resizing window not working properly MFC

2 Answers