Create a view program without document classes using MFC

MFC Program The most important thing is the document view framework. Do not create documents now? Although the online materials are transferred

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# Include <Afxwin. h>// MFCCore Components and standard components

# Include <Afxext. h>// MFCExtension

// ================================================ =View class =================================================== =====

ClassCmyview:PublicCview

{

//The constructor is declared as protected, which means that it can only be created inside the framework.

Protected:

Cmyview ()

{

}

//Can be dynamically created

Declare_dyncreate (cmyview)

//Declare message ing

Declare_message_map ()

//Customize background Erasure

Afx_msg bool onerasebkgnd (CDC * PDC)

{

Rect;

This-> Getclientrect (& rect );

Colorref color = RGB (1, 200,200,220 );

Cbrush brush (color );

PDC-> fillrect (& rect, & brush );

ReturnTrue;

}

Public:

//This function must be implemented. This is a pure virtual function of the cview class, And cview is an abstract class.

Virtual VoidOndraw (CDC * PDC)

{

PDC-> setbkmode (transparent );

PDC-> textoutw (100,100, cstring ("This is my view"));

}

//The Destructor is public.

~ Cmyview ()

{

}

};

//Dynamic creation capability

Implement_dyncreate (cmyview, cview)

//Message ing

Begin_message_map (cmyview, cview)

On_wm_erasebkgnd ()

End_message_map ()

// ================================================ =Main framework window class ================================================= ======

ClassCmainframe:PublicCframewnd

{

Protected:

//Supports dynamic creation

Declare_dyncreate (cmainframe)

//Message ing supported

Declare_message_map ()

//View

Cmyview * m_pmainview;

// OncreateMethod, called only when the window is created, caused by the wm_create message

Afx_msgIntOncreate (maid)

{

//First, complete the method of the base class

If(Cframewnd: oncreate (lpcreatestruct) =-1)

Return-1;

//To create a view, you must declare a context view structure.

Ccreatecontext CCX;

CCX. m_pnewviewclass = runtime_class (cmyview );

CCX. m_pcurrentframe =This;

CCX. m_pcurrentdoc = NULL;

CCX. m_pnewdoctemplate = NULL;

CCX. m_plastview = NULL;

//Create a view using struct

M_pmainview = dynamic_downcast (cmyview,This-> Createview (& CCX ));

//If creation fails

If(! M_pmainview)

{

Trace0 ("Creation of view failed");

}

//Relayout the main framework

Recalclayout ();

//Display View

M_pmainview-> showwindow (sw_show );

M_pmainview-> updatewindow ();

Return0;

}

Public:

Cmainframe ()

{

M_pmainview = NULL;

}

~ Cmainframe ()

{

}

};

//Dynamic creation capability

Implement_dyncreate (cmainframe, cframewnd)

//Message ing

Begin_message_map (cmainframe, cframewnd)

On_wm_create ()

End_message_map ()

// ================================================ =Main Application class ================================================= ========

ClassCmyapp:PublicCwinapp

{

Public:

Cmyapp ()

{

}

VirtualBool initinstance ()

{

Cwinapp: initinstance ();

Cmainframe * pframe =NewCmainframe ();

Pframe-> Create (null, (lpctstr) _ T ("Hello"));

This-> M_pmainwnd = pframe;

This-> M_pmainwnd-> showwindow (sw_show );

This-> M_pmainwnd-> updatewindow ();

ReturnTrue;

}

};

Cmyapp theapp;