C / C++ / MFC

Maximilien wrote:

...the MainFrame as a WS_CHILD of the main frame ?

CMainFrame* pFrame = (CMainFrame*)GetMainWnd();
CChildFrame* pChild = (CChildFrame*)pFrame->GetActiveFrame();

CmyDlg* pDlg = new CmyDlg;
pDlg->Create(IDD_DIALOG_myDlg, pChild->GetParent());
pDlg->ShowWindow(SW_SHOW);

BOOL CModelessDlg::OnInitDialog() 
{
    CDialog::OnInitDialog();
	
    CRect rc;
    GetWindowRect(rc);
    m_lWidth = rc.Width();
    m_lHeight = rc.Height();
 
    AfxGetMainWnd()->GetWindowRect(m_rcParent);
    
    return TRUE;
}
 
void CModelessDlg::OnMoving(UINT fwSide, LPRECT pRect) 
{
    CDialog::OnMoving(fwSide, pRect);
	
    // keep the child's left edge inside the parent's right edge
    pRect->left = min(pRect->left, m_rcParent.right - m_lWidth);
    // keep the child's left edge inside the parent's left edge
    pRect->left = max(pRect->left, m_rcParent.left);
 
    // keep the child's top edge inside the parent's bottom edge
    pRect->top  = min(pRect->top, m_rcParent.bottom - m_lHeight);
    // keep the child's top edge inside the parent's top edge
    pRect->top  = max(pRect->top, m_rcParent.top);
 
    // keep the child's right edge inside the parent's right edge
    pRect->right = min(pRect->right, m_rcParent.right);
    // keep the child's right edge inside the parent's left edge
    pRect->right = max(pRect->right, m_rcParent.left + m_lWidth);
    
    // keep the child's bottom edge inside the parent's bottom edge
    pRect->bottom = min(pRect->bottom, m_rcParent.bottom);
    // keep the child's bottom edge inside the parent's top edge
    pRect->bottom = max(pRect->bottom, m_rcParent.top + m_lHeight);
}

PatrykDabrowski wrote:

Is it safe to use:[...]

PatrykDabrowski wrote:

or I should use SelectObject(m_pOld)/DeleteDC() after each SelectObject(&some_bitmapX)??

pri_skit wrote:

No it is not safe to use

CDC dc;//assign value
dc.SaveDC();
/*
 * Do select object,
 * or what ever you want.
 */
dc.RestoreDC( -1 );

CPallini wrote:

Please revise the order of your list

PatrykDabrowski wrote:

I care more about performance So the order is fine

PatrykDabrowski wrote:

I have written "as long as I dont have leaks, I care more about performance ";)...so my priority is to avoid memory leaks and then I optimize my code.

PatrykDabrowski wrote:

I delete some_bitmapX objects (when exiting the app as they are 'global').

PatrykDabrowski wrote:

CreateCompatibleDC()/DeleteDC() slower comparing to CDC::SaveDC()/RestoreDC()??

CDC dc; dc.CreateCompatibleDC(..);
dc.SaveDC();
dc.SelectObject(bitmap1); /* do something */
dc.SelectObject(bitmap2); /* do something */
dc.RestoreDC( -1 );
dc.DeleteDC();