Methods for getting pointers in MFC

1. Obtain the applicationProgramPointer

Cmyapp * PAPP = (cmyapp *) afxgetapp ();

2. Obtain the master framework pointer

The Public member variable m_pmainwnd in cwinapp is the pointer of the main framework.

Cmainframe * pmainframe = (cmainframe *) (afxgetapp ()-> m_pmainwnd );

Or

Cmainframe * pmainframe = (cmainframe *) afxgetmainwnd ();

3. Get menu pointer

Cmenu * pmenu = afxgetmainwnd ()-> getmenu ();

4. Get the toolbar and status bar pointer

M_wndtoolbar and m_wndstatusbar can be directly used in the main framework.

Others:

Ctoolbar * ptoolbar = (ctoolbar *) afxgetmainwnd ()-> getdescendantwindow (afx_idw_toolbar );

Cstatusbar * pstatusbar = (cstatusbar *) afxgetmainwnd ()-> getdescendantwindow (afx_idw_status_bar );

5. Get the control pointer

Use getdlgitem () before conversion, for example:

Cbutton * pbutton = (cbutton *) getdlgitem (idc_mybutton );

6. Get documents and view pointers

SDI:

Cmainframe * pmainframe = (cmainframe *) afxgetmainwnd ();

Cyourdoc * pdoc = (cyourdoc *) pmainframe-> getactivedocument ();

Cyourview * pview = (cyourview *) pmainframe-> getactiveview ();

MDI:

Cmainframe * pmainframe = (cmainframe *) afxgetmainwnd ();

Cchildframe * pchildframe = (cchildframe *) pmainframe-> getactiveframe ();

Cyourdoc * pdoc = (cyourdoc *) pchildframe-> getactivedocument ();

Cyourview * pview = (cyourview *) pchildframe-> getactiveview ();

7. Documents and views

Get document pointer from view:

Cyourdoc * pdoc = getdocument ();

Get view pointer from document:

Traverse using the member functions getfirstviewposition () and getnextview ()

Virtual position getfirstviewposition () const;

Virtual cview * getnextview (Position & rposition) const;

SDI:

Cyourview * pview;

Position Pos = getfirstviewposition ();

Pview = getnextview (POS );

MDI:

Define functions

Cview * cyourdoc: getview (cruntimeclass * Pclass)

{

Cview * pview;

Position Pos = getfirstviewposition ();

While (Pos! = NULL)

{

Pview = getnextview (POS );

If (! Pview-> iskindof (Pclass ))

Break;

}

If (! Pview-> iskindof (Pclass ))

{

Afxmessagebox ("connt locate the view .");

Return NULL;

}

Return pview;

}

Use:

Cyourview * pview = (cyourview *) getview (runtime_class (cyourview ));

8. document templates and documents

Getting the document template pointer from the document:

Cdoctemplate * getdoctemplate () const;

Get the document pointer from the document template:

Viaual position getfirstdocposition () const = 0;

Visual cdocument * getnextdoc (Position & rpos) const = 0;

9. Obtain the pointer of each view in the split view

Defined in the main framework: csplitterwnd m_wndsplitter;

Define two view classes: cview1 and cview2

Reload in the framework class:

Bool cmainframe: oncreateclient (lpcreatestruct, ccreatecontext * pcontext)

{

Verify (m_splitter.createstatic (this,); // split it into two rows and one column

Verify (m_splitter.createview (100,100, runtime_class (cview1), csize (), pcontext ));

Verify (m_splitter.createview (100,100, runtime_class (cview2), csize (), pcontext ));

Return true;

}

Obtain the split view pointer

Cview1 * pview1 = (cview1 *) m_wndsplitter.getpane (0, 0 );

Cview2 * pview2 = (cview2 *) m_wndsplitter.getpane (1, 0 );

10. Obtain the Child Window pointer with the mouse

Cwnd * childwindowfrompoint (point) const;

Cwnd * childwindowfrompoint (point, uint nflags) const;

Used to determine the subwindow containing the specified Vertex

If the specified point is outside the customer area, the function returns NULL;

If the specified point is in the customer region but does not belong to any subwindow, the function returns the cwnd pointer;

If multiple subwindows contain the specified vertex, the pointer of the first subwindow is returned.

Note that the function returns a pseudo window pointer and cannot be saved for future use.

The second parameter nflags has several meanings:

Cwp_all file: // do not ignore any subwindow

Cwp_skipnivsible file: // ignore invisible subwindow

Cwp_skipdisabled file: // ignore the prohibited subwindow

Cwp_skipransparent file: // ignore transparent subwindow

Get the pointer of the toolbar

By default, there is a default tool bar afx_idw_toolbar. We can obtain the tool bar pointer based on the corresponding ID. The method is as follows:

Ctoolbar * ptoolbar = (ctoolbar *) afxgetmainwnd ()-> getdescendantwindow (afx_idw_toolbar );