docview.h

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/////////////////////////////////////////////////////////////////////////////
// Name:        docview.h
// Purpose:     Doc/View classes
// Author:      Julian Smart
// Modified by:
// Created:     01/02/97
// RCS-ID:      $Id: docview.h,v 1.68 2005/05/04 18:51:57 JS Exp $
// Copyright:   (c) Julian Smart
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifndef _WX_DOCH__
#define _WX_DOCH__

#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
    #pragma interface "docview.h"
#endif

#include "wx/defs.h"

#if wxUSE_DOC_VIEW_ARCHITECTURE

#include "wx/list.h"
#include "wx/cmndata.h"
#include "wx/string.h"
#include "wx/frame.h"

#if wxUSE_PRINTING_ARCHITECTURE
    #include "wx/print.h"
#endif

class WXDLLEXPORT wxWindow;
class WXDLLEXPORT wxDocument;
class WXDLLEXPORT wxView;
class WXDLLEXPORT wxDocTemplate;
class WXDLLEXPORT wxDocManager;
class WXDLLEXPORT wxPrintInfo;
class WXDLLEXPORT wxCommandProcessor;
class WXDLLEXPORT wxFileHistory;
class WXDLLEXPORT wxConfigBase;

#if wxUSE_STD_IOSTREAM
  #include "wx/iosfwrap.h"
#else
  #include "wx/stream.h"
#endif

// Document manager flags
enum
{
    wxDOC_SDI = 1,
    wxDOC_MDI,
    wxDOC_NEW,
    wxDOC_SILENT,
    wxDEFAULT_DOCMAN_FLAGS = wxDOC_SDI
};

// Document template flags
enum
{
    wxTEMPLATE_VISIBLE = 1,
    wxTEMPLATE_INVISIBLE,
    wxDEFAULT_TEMPLATE_FLAGS = wxTEMPLATE_VISIBLE
};

#define wxMAX_FILE_HISTORY 9

class WXDLLEXPORT wxDocument : public wxEvtHandler
{
public:
    wxDocument(wxDocument *parent = (wxDocument *) NULL);
    ~wxDocument();

    // accessors
    void SetFilename(const wxString& filename, bool notifyViews = false);
    wxString GetFilename() const { return m_documentFile; }

    void SetTitle(const wxString& title) { m_documentTitle = title; };
    wxString GetTitle() const { return m_documentTitle; }

    void SetDocumentName(const wxString& name) { m_documentTypeName = name; };
    wxString GetDocumentName() const { return m_documentTypeName; }

    bool GetDocumentSaved() const { return m_savedYet; }
    void SetDocumentSaved(bool saved = true) { m_savedYet = saved; }

    virtual bool Close();
    virtual bool Save();
    virtual bool SaveAs();
    virtual bool Revert();

#if wxUSE_STD_IOSTREAM
    virtual wxSTD ostream& SaveObject(wxSTD ostream& stream);
    virtual wxSTD istream& LoadObject(wxSTD istream& stream);
#else
    virtual wxOutputStream& SaveObject(wxOutputStream& stream);
    virtual wxInputStream& LoadObject(wxInputStream& stream);
#endif

    // Called by wxWidgets
    virtual bool OnSaveDocument(const wxString& filename);
    virtual bool OnOpenDocument(const wxString& filename);
    virtual bool OnNewDocument();
    virtual bool OnCloseDocument();

    // Prompts for saving if about to close a modified document. Returns true
    // if ok to close the document (may have saved in the meantime, or set
    // modified to false)
    virtual bool OnSaveModified();

    // Called by framework if created automatically by the default document
    // manager: gives document a chance to initialise and (usually) create a
    // view
    virtual bool OnCreate(const wxString& path, long flags);

    // By default, creates a base wxCommandProcessor.
    virtual wxCommandProcessor *OnCreateCommandProcessor();
    virtual wxCommandProcessor *GetCommandProcessor() const { return m_commandProcessor; }
    virtual void SetCommandProcessor(wxCommandProcessor *proc) { m_commandProcessor = proc; }

    // Called after a view is added or removed. The default implementation
    // deletes the document if this is there are no more views.
    virtual void OnChangedViewList();

    virtual bool DeleteContents();

    virtual bool Draw(wxDC&);
    virtual bool IsModified() const { return m_documentModified; }
    virtual void Modify(bool mod) { m_documentModified = mod; }

    virtual bool AddView(wxView *view);
    virtual bool RemoveView(wxView *view);
    wxList& GetViews() const { return (wxList&) m_documentViews; }
    wxView *GetFirstView() const;

    virtual void UpdateAllViews(wxView *sender = (wxView *) NULL, wxObject *hint = (wxObject *) NULL);
    virtual void NotifyClosing();

    // Remove all views (because we're closing the document)
    virtual bool DeleteAllViews();

    // Other stuff
    virtual wxDocManager *GetDocumentManager() const;
    virtual wxDocTemplate *GetDocumentTemplate() const { return m_documentTemplate; }
    virtual void SetDocumentTemplate(wxDocTemplate *temp) { m_documentTemplate = temp; }

    // Get title, or filename if no title, else [unnamed]
    virtual bool GetPrintableName(wxString& buf) const;

    // Returns a window that can be used as a parent for document-related
    // dialogs. Override if necessary.
    virtual wxWindow *GetDocumentWindow() const;

protected:
    wxList                m_documentViews;
    wxString              m_documentFile;
    wxString              m_documentTitle;
    wxString              m_documentTypeName;
    wxDocTemplate*        m_documentTemplate;
    bool                  m_documentModified;
    wxDocument*           m_documentParent;
    wxCommandProcessor*   m_commandProcessor;
    bool                  m_savedYet;

    // Called by OnSaveDocument and OnOpenDocument to implement standard
    // Save/Load behavior. Re-implement in derived class for custom
    // behavior.
    virtual bool DoSaveDocument(const wxString& file);
    virtual bool DoOpenDocument(const wxString& file);

private:
    DECLARE_ABSTRACT_CLASS(wxDocument)
    DECLARE_NO_COPY_CLASS(wxDocument)
};

class WXDLLEXPORT wxView: public wxEvtHandler
{
public:
    //  wxView(wxDocument *doc = (wxDocument *) NULL);
    wxView();
    ~wxView();

    wxDocument *GetDocument() const { return m_viewDocument; }
    virtual void SetDocument(wxDocument *doc);

    wxString GetViewName() const { return m_viewTypeName; }
    void SetViewName(const wxString& name) { m_viewTypeName = name; };

    wxWindow *GetFrame() const { return m_viewFrame ; }
    void SetFrame(wxWindow *frame) { m_viewFrame = frame; }

    virtual void OnActivateView(bool activate, wxView *activeView, wxView *deactiveView);
    virtual void OnDraw(wxDC *dc) = 0;
    virtual void OnPrint(wxDC *dc, wxObject *info);
    virtual void OnUpdate(wxView *sender, wxObject *hint = (wxObject *) NULL);
    virtual void OnClosingDocument() {}
    virtual void OnChangeFilename();

    // Called by framework if created automatically by the default document
    // manager class: gives view a chance to initialise
    virtual bool OnCreate(wxDocument *WXUNUSED(doc), long WXUNUSED(flags)) { return true; };

    // Checks if the view is the last one for the document; if so, asks user
    // to confirm save data (if modified). If ok, deletes itself and returns
    // true.
    virtual bool Close(bool deleteWindow = true);

    // Override to do cleanup/veto close
    virtual bool OnClose(bool deleteWindow);

    // Extend event processing to search the document's event table
    virtual bool ProcessEvent(wxEvent& event);

    // A view's window can call this to notify the view it is (in)active.
    // The function then notifies the document manager.
    virtual void Activate(bool activate);

    wxDocManager *GetDocumentManager() const
        { return m_viewDocument->GetDocumentManager(); }

#if wxUSE_PRINTING_ARCHITECTURE
    virtual wxPrintout *OnCreatePrintout();
#endif

protected:
    wxDocument*       m_viewDocument;
    wxString          m_viewTypeName;
    wxWindow*         m_viewFrame;

private:
    DECLARE_ABSTRACT_CLASS(wxView)
    DECLARE_NO_COPY_CLASS(wxView)
};

// Represents user interface (and other) properties of documents and views
class WXDLLEXPORT wxDocTemplate: public wxObject
{

friend class WXDLLEXPORT wxDocManager;

public:
    // Associate document and view types. They're for identifying what view is
    // associated with what template/document type
    wxDocTemplate(wxDocManager *manager,
                  const wxString& descr,
                  const wxString& filter,
                  const wxString& dir,
                  const wxString& ext,
                  const wxString& docTypeName,
                  const wxString& viewTypeName,
                  wxClassInfo *docClassInfo = (wxClassInfo *) NULL,
                  wxClassInfo *viewClassInfo = (wxClassInfo *)NULL,
                  long flags = wxDEFAULT_TEMPLATE_FLAGS);

    ~wxDocTemplate();

    // By default, these two member functions dynamically creates document and
    // view using dynamic instance construction. Override these if you need a
    // different method of construction.
    virtual wxDocument *CreateDocument(const wxString& path, long flags = 0);
    virtual wxView *CreateView(wxDocument *doc, long flags = 0);

    // Helper method for CreateDocument; also allows you to do your own document
    // creation
    virtual bool InitDocument(wxDocument* doc, const wxString& path, long flags = 0);

    wxString GetDefaultExtension() const { return m_defaultExt; };
    wxString GetDescription() const { return m_description; }
    wxString GetDirectory() const { return m_directory; };
    wxDocManager *GetDocumentManager() const { return m_documentManager; }
    void SetDocumentManager(wxDocManager *manager) { m_documentManager = manager; }
    wxString GetFileFilter() const { return m_fileFilter; };
    long GetFlags() const { return m_flags; };
    virtual wxString GetViewName() const { return m_viewTypeName; }
    virtual wxString GetDocumentName() const { return m_docTypeName; }

    void SetFileFilter(const wxString& filter) { m_fileFilter = filter; };
    void SetDirectory(const wxString& dir) { m_directory = dir; };
    void SetDescription(const wxString& descr) { m_description = descr; };
    void SetDefaultExtension(const wxString& ext) { m_defaultExt = ext; };
    void SetFlags(long flags) { m_flags = flags; };

    bool IsVisible() const { return ((m_flags & wxTEMPLATE_VISIBLE) == wxTEMPLATE_VISIBLE); }

    wxClassInfo* GetDocClassInfo() const { return m_docClassInfo; }
    wxClassInfo* GetViewClassInfo() const { return m_viewClassInfo; }

    virtual bool FileMatchesTemplate(const wxString& path);

protected:
    long              m_flags;
    wxString          m_fileFilter;
    wxString          m_directory;
    wxString          m_description;
    wxString          m_defaultExt;
    wxString          m_docTypeName;
    wxString          m_viewTypeName;
    wxDocManager*     m_documentManager;

    // For dynamic creation of appropriate instances.
    wxClassInfo*      m_docClassInfo;
    wxClassInfo*      m_viewClassInfo;

    // Called by CreateDocument and CreateView to create the actual document/view object.
    // By default uses the ClassInfo provided to the constructor. Override these functions
    // to provide a different method of creation.
    virtual wxDocument *DoCreateDocument();
    virtual wxView *DoCreateView();

private:
    DECLARE_CLASS(wxDocTemplate)
    DECLARE_NO_COPY_CLASS(wxDocTemplate)
};