Introduction
This is a simple visual
C++ 6.0 multiple
document (MDI) project that allows opening
/ saving multiple types of documents.
Normally, when you start an MDI
project, you are allowed to associate one file type
(i.e. extension) with your project. If you want to be
able to open / save more that one type, you need to
change your program a bit (Figure 1). MyFirstProject is
a simple empty project that handles
multiple types.
What you need to do
All the altered codes
are marked (as //Babak) so you can find them easily and
just implement them exactly in your own project. Here is
a summary of what you need to do:
- Derive a class from
CDocManager
(here named CMultDocManager)
- Override
DoPromptFileName
- Override
OnFileNew
- You will need to
copy
_AfxAppendFilterSuffix (with a
slight change) from mfc/src/ docmgr.cpp (bad
programming style)
- Derive a class from
CMultiDocTemplate
(here named CMultMultiDocTemplate)
(this is so your program can recognize multiple file
types seperated by a semicolon
- Override
GetDocString
- Override
MatchDocType
(for the last two
steps, just add the files MultDocManager.h/cpp and
MultMultiDocTemplate.h/cpp to your project)
- Set
m_pDocManager of your main application
class (the one that is derived from CWinApp)
to new CmultDocManager
- Open
the .rc file of the project and make copies of IDR_...TYPE
(for various file types)
- Go
through all the projcet files and everytime IDR_...TYPE
is used, also use the new ones you made
- Override
DoSave in your main document class (the
one that is derived from CDocument)
References
- “MFC
Document/View documentation and
enhancements” by Roger Allen on CodeProject.com
- “How to support two
file extensions per MFC
document type” Micorosft support document Article
ID 141921
- “DocMgrEx.exe
Assoc Multiple File Extension w/2 Doc Tyle”
Micorosft support document Article ID 198538
- “Selecting
multiple files in File Open dialog” by Kaus Gutter
on CodeGuru.com
- “Opening
multiple documents of several types at once”
by Ernesto Perales Soto on CodeProject.com
XD++
Library
