xmlres.h

wxGTK 是 wxWidgets 的 linux GTK+ (>2.2.3)版本。wxWidgets 是一个跨平台的 GUI 框架

/////////////////////////////////////////////////////////////////////////////
// Name:        wx/xrc/xmlres.h
// Purpose:     XML resources
// Author:      Vaclav Slavik
// Created:     2000/03/05
// RCS-ID:      $Id: xmlres.h,v 1.59 2006/10/21 13:59:21 RR Exp $
// Copyright:   (c) 2000 Vaclav Slavik
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifndef _WX_XMLRES_H_
#define _WX_XMLRES_H_

#include "wx/defs.h"

#if wxUSE_XRC

#include "wx/string.h"
#include "wx/dynarray.h"
#include "wx/datetime.h"
#include "wx/list.h"
#include "wx/gdicmn.h"
#include "wx/filesys.h"
#include "wx/bitmap.h"
#include "wx/icon.h"
#include "wx/artprov.h"
#include "wx/colour.h"
#include "wx/animate.h"

#include "wx/xml/xml.h"

class WXDLLEXPORT wxMenu;
class WXDLLEXPORT wxMenuBar;
class WXDLLEXPORT wxDialog;
class WXDLLEXPORT wxPanel;
class WXDLLEXPORT wxWindow;
class WXDLLEXPORT wxFrame;
class WXDLLEXPORT wxToolBar;

class WXDLLIMPEXP_XRC wxXmlResourceHandler;
class WXDLLIMPEXP_XRC wxXmlSubclassFactory;
class WXDLLIMPEXP_XRC wxXmlSubclassFactoriesList;
class wxXmlResourceModule;


// These macros indicate current version of XML resources (this information is
// encoded in root node of XRC file as "version" property).
//
// Rules for increasing version number:
//   - change it only if you made incompatible change to the format. Addition
//     of new attribute to control handler is _not_ incompatible change, because
//     older versions of the library may ignore it.
//   - if you change version number, follow these steps:
//       - set major, minor and release numbers to respective version numbers of
//         the wxWidgets library (see wx/version.h)
//       - reset revision to 0 unless the first three are same as before,
//         in which case you should increase revision by one
#define WX_XMLRES_CURRENT_VERSION_MAJOR            2
#define WX_XMLRES_CURRENT_VERSION_MINOR            5
#define WX_XMLRES_CURRENT_VERSION_RELEASE          3
#define WX_XMLRES_CURRENT_VERSION_REVISION         0
#define WX_XMLRES_CURRENT_VERSION_STRING       _T("2.5.3.0")

#define WX_XMLRES_CURRENT_VERSION \
                (WX_XMLRES_CURRENT_VERSION_MAJOR * 256*256*256 + \
                 WX_XMLRES_CURRENT_VERSION_MINOR * 256*256 + \
                 WX_XMLRES_CURRENT_VERSION_RELEASE * 256 + \
                 WX_XMLRES_CURRENT_VERSION_REVISION)

class WXDLLIMPEXP_XRC wxXmlResourceDataRecord
{
public:
    wxXmlResourceDataRecord() : Doc(NULL) {
#if wxUSE_DATETIME
        Time = wxDateTime::Now();
#endif
    }
    ~wxXmlResourceDataRecord() {delete Doc;}

    wxString File;
    wxXmlDocument *Doc;
#if wxUSE_DATETIME
    wxDateTime Time;
#endif
};


WX_DECLARE_USER_EXPORTED_OBJARRAY(wxXmlResourceDataRecord,
                                  wxXmlResourceDataRecords,
                                  WXDLLIMPEXP_XRC);

enum wxXmlResourceFlags
{
    wxXRC_USE_LOCALE     = 1,
    wxXRC_NO_SUBCLASSING = 2,
    wxXRC_NO_RELOADING   = 4
};

// This class holds XML resources from one or more .xml files
// (or derived forms, either binary or zipped -- see manual for
// details).
class WXDLLIMPEXP_XRC wxXmlResource : public wxObject
{
public:
    // Constructor.
    // Flags: wxXRC_USE_LOCALE
    //              translatable strings will be translated via _()
    //              using the given domain if specified
    //        wxXRC_NO_SUBCLASSING
    //              subclass property of object nodes will be ignored
    //              (useful for previews in XRC editors)
    //        wxXRC_NO_RELOADING
    //              don't check the modification time of the XRC files and
    //              reload them if they have changed on disk
    wxXmlResource(int flags = wxXRC_USE_LOCALE,
                  const wxString& domain=wxEmptyString);

    // Constructor.
    // Flags: wxXRC_USE_LOCALE
    //              translatable strings will be translated via _()
    //              using the given domain if specified
    //        wxXRC_NO_SUBCLASSING
    //              subclass property of object nodes will be ignored
    //              (useful for previews in XRC editors)
    wxXmlResource(const wxString& filemask, int flags = wxXRC_USE_LOCALE,
                  const wxString& domain=wxEmptyString);

    // Destructor.
    virtual ~wxXmlResource();

    wxXmlNode *GetFirstRoot();
    
    // Loads resources from XML files that match given filemask.
    // This method understands VFS (see filesys.h).
    bool Load(const wxString& filemask);

    // Unload resource from the given XML file (wildcards not allowed)
    bool Unload(const wxString& filename);

    // Initialize handlers for all supported controls/windows. This will
    // make the executable quite big because it forces linking against
    // most of the wxWidgets library.
    void InitAllHandlers();

    // Initialize only a specific handler (or custom handler). Convention says
    // that handler name is equal to the control's name plus 'XmlHandler', for
    // example wxTextCtrlXmlHandler, wxHtmlWindowXmlHandler. The XML resource
    // compiler (xmlres) can create include file that contains initialization
    // code for all controls used within the resource.
    void AddHandler(wxXmlResourceHandler *handler);

    // Add a new handler at the begining of the handler list
    void InsertHandler(wxXmlResourceHandler *handler);

    // Removes all handlers
    void ClearHandlers();

    // Registers subclasses factory for use in XRC. This function is not meant
    // for public use, please see the comment above wxXmlSubclassFactory
    // definition.
    static void AddSubclassFactory(wxXmlSubclassFactory *factory);

    // Loads menu from resource. Returns NULL on failure.
    wxMenu *LoadMenu(const wxString& name);

    // Loads menubar from resource. Returns NULL on failure.
    wxMenuBar *LoadMenuBar(wxWindow *parent, const wxString& name);

    // Loads menubar from resource. Returns NULL on failure.
    wxMenuBar *LoadMenuBar(const wxString& name) { return LoadMenuBar(NULL, name); }

#if wxUSE_TOOLBAR
    // Loads a toolbar.
    wxToolBar *LoadToolBar(wxWindow *parent, const wxString& name);
#endif

    // Loads a dialog. dlg points to parent window (if any).
    wxDialog *LoadDialog(wxWindow *parent, const wxString& name);

    // Loads a dialog. dlg points to parent window (if any). This form
    // is used to finish creation of already existing instance (main reason
    // for this is that you may want to use derived class with new event table)
    // Example (typical usage):
    //      MyDialog dlg;
    //      wxTheXmlResource->LoadDialog(&dlg, mainFrame, "my_dialog");
    //      dlg->ShowModal();
    bool LoadDialog(wxDialog *dlg, wxWindow *parent, const wxString& name);

    // Loads a panel. panel points to parent window (if any).
    wxPanel *LoadPanel(wxWindow *parent, const wxString& name);

    // Loads a panel. panel points to parent window (if any). This form
    // is used to finish creation of already existing instance.
    bool LoadPanel(wxPanel *panel, wxWindow *parent, const wxString& name);

    // Loads a frame.
    wxFrame *LoadFrame(wxWindow* parent, const wxString& name);
    bool LoadFrame(wxFrame* frame, wxWindow *parent, const wxString& name);

    // Load an object from the resource specifying both the resource name and
    // the classname.  This lets you load nonstandard container windows.
    wxObject *LoadObject(wxWindow *parent, const wxString& name,
                         const wxString& classname);

    // Load an object from the resource specifying both the resource name and
    // the classname.  This form lets you finish the creation of an existing
    // instance.
    bool LoadObject(wxObject *instance, wxWindow *parent, const wxString& name,
                    const wxString& classname);

    // Loads a bitmap resource from a file.
    wxBitmap LoadBitmap(const wxString& name);

    // Loads an icon resource from a file.
    wxIcon LoadIcon(const wxString& name);

    // Attaches an unknown control to the given panel/window/dialog.
    // Unknown controls are used in conjunction with <object class="unknown">.
    bool AttachUnknownControl(const wxString& name, wxWindow *control,
                              wxWindow *parent = NULL);

    // Returns a numeric ID that is equivalent to the string ID used in an XML
    // resource. If an unknown str_id is requested (i.e. other than wxID_XXX
    // or integer), a new record is created which associates the given string
    // with a number. If value_if_not_found == wxID_NONE, the number is obtained via
    // wxNewId(). Otherwise value_if_not_found is used.
    // Macro XRCID(name) is provided for convenient use in event tables.
    static int GetXRCID(const wxChar *str_id, int value_if_not_found = wxID_NONE);

    // Returns version information (a.b.c.d = d+ 256*c + 256^2*b + 256^3*a).
    long GetVersion() const { return m_version; }

    // Compares resources version to argument. Returns -1 if resources version
    // is less than the argument, +1 if greater and 0 if they equal.
    int CompareVersion(int major, int minor, int release, int revision) const
        { return GetVersion() -
                 (major*256*256*256 + minor*256*256 + release*256 + revision); }

//// Singleton accessors.

    // Gets the global resources object or creates one if none exists.
    static wxXmlResource *Get();

    // Sets the global resources object and returns a pointer to the previous one (may be NULL).
    static wxXmlResource *Set(wxXmlResource *res);

    // Returns flags, which may be a bitlist of wxXRC_USE_LOCALE and wxXRC_NO_SUBCLASSING.
    int GetFlags() const { return m_flags; }
    // Set flags after construction.
    void SetFlags(int flags) { m_flags = flags; }

    // Get/Set the domain to be passed to the translation functions, defaults to NULL.
    wxChar* GetDomain() const { return m_domain; }
    void SetDomain(const wxChar* domain);
    
protected:
    // Scans the resources list for unloaded files and loads them. Also reloads
    // files that have been modified since last loading.
    bool UpdateResources();

    // Finds a resource (calls UpdateResources) and returns a node containing it.
    wxXmlNode *FindResource(const wxString& name, const wxString& classname, bool recursive = false);

    // Helper function: finds a resource (calls UpdateResources) and returns a node containing it.
    wxXmlNode *DoFindResource(wxXmlNode *parent, const wxString& name, const wxString& classname, bool recursive);