contrib/include/wx/xrc/xmlres.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        xmlres.h
   3 // Purpose:     XML resources
   4 // Author:      Vaclav Slavik
   5 // Created:     2000/03/05
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2000 Vaclav Slavik
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 #ifndef _WX_XMLRES_H_
  12 #define _WX_XMLRES_H_
  13
  14 #if defined(__GNUG__) && !defined(__APPLE__)
  15 #pragma interface "xmlres.h"
  16 #endif
  17
  18 #include "wx/defs.h"
  19 #include "wx/string.h"
  20 #include "wx/dynarray.h"
  21 #include "wx/datetime.h"
  22 #include "wx/list.h"
  23 #include "wx/gdicmn.h"
  24 #include "wx/filesys.h"
  25 #include "wx/bitmap.h"
  26 #include "wx/icon.h"
  27 #include "wx/artprov.h"
  28
  29 #include "wx/xrc/xml.h"
  30
  31 class WXDLLEXPORT wxMenu;
  32 class WXDLLEXPORT wxMenuBar;
  33 class WXDLLEXPORT wxDialog;
  34 class WXDLLEXPORT wxPanel;
  35 class WXDLLEXPORT wxWindow;
  36 class WXDLLEXPORT wxFrame;
  37 class WXDLLEXPORT wxToolBar;
  38
  39 class WXXMLDLLEXPORT wxXmlResourceHandler;
  40 class WXXMLDLLEXPORT wxXmlSubclassFactory;
  41 class WXXMLDLLEXPORT wxXmlSubclassFactoriesList;
  42 class wxXmlResourceModule;
  43
  44
  45 // These macros indicate current version of XML resources (this information is
  46 // encoded in root node of XRC file as "version" property).
  47 //
  48 // Rules for increasing version number:
  49 //   - change it only if you made incompatible change to the format. Addition of new
  50 //     attribute to control handler is _not_ incompatible change, because older
  51 //     versions of the library may ignore it.
  52 //   - if you change version number, follow these steps:
  53 //       - set major, minor and release numbers to respective version numbers of
  54 //         the wxWindows library (see wx/version.h)
  55 //       - reset revision to 0 unless the first three are same as before, in which
  56 //         case you should increase revision by one
  57 #define WX_XMLRES_CURRENT_VERSION_MAJOR            2
  58 #define WX_XMLRES_CURRENT_VERSION_MINOR            3
  59 #define WX_XMLRES_CURRENT_VERSION_RELEASE          0
  60 #define WX_XMLRES_CURRENT_VERSION_REVISION         1
  61 #define WX_XMLRES_CURRENT_VERSION_STRING       _T("2.3.0.1")
  62
  63 #define WX_XMLRES_CURRENT_VERSION \
  64                 (WX_XMLRES_CURRENT_VERSION_MAJOR * 256*256*256 + \
  65                  WX_XMLRES_CURRENT_VERSION_MINOR * 256*256 + \
  66                  WX_XMLRES_CURRENT_VERSION_RELEASE * 256 + \
  67                  WX_XMLRES_CURRENT_VERSION_REVISION)
  68
  69 class WXXMLDLLEXPORT wxXmlResourceDataRecord
  70 {
  71 public:
  72     wxXmlResourceDataRecord() : Doc(NULL), Time(wxDateTime::Now()) {}
  73     ~wxXmlResourceDataRecord() {delete Doc;}
  74
  75     wxString File;
  76     wxXmlDocument *Doc;
  77     wxDateTime Time;
  78 };
  79
  80
  81 #ifdef WXXMLISDLL
  82 WX_DECLARE_EXPORTED_OBJARRAY(wxXmlResourceDataRecord, wxXmlResourceDataRecords);
  83 #else
  84 WX_DECLARE_OBJARRAY(wxXmlResourceDataRecord, wxXmlResourceDataRecords);
  85 #endif
  86
  87 enum wxXmlResourceFlags
  88 {
  89     wxXRC_USE_LOCALE     = 1,
  90     wxXRC_NO_SUBCLASSING = 2
  91 };
  92
  93 // This class holds XML resources from one or more .xml files
  94 // (or derived forms, either binary or zipped -- see manual for
  95 // details).
  96 class WXXMLDLLEXPORT wxXmlResource : public wxObject
  97 {
  98 public:
  99     // Constructor.
 100     // Flags: wxXRC_USE_LOCALE
 101     //              translatable strings will be translated via _()
 102     //        wxXRC_NO_SUBCLASSING
 103     //              subclass property of object nodes will be ignored
 104     //              (useful for previews in XRC editors)
 105     wxXmlResource(int flags = wxXRC_USE_LOCALE);
 106
 107     // Constructor.
 108     // Flags: wxXRC_USE_LOCALE
 109     //              translatable strings will be translated via _()
 110     //        wxXRC_NO_SUBCLASSING
 111     //              subclass property of object nodes will be ignored
 112     //              (useful for previews in XRC editors)
 113     wxXmlResource(const wxString& filemask, int flags = wxXRC_USE_LOCALE);
 114
 115     // Destructor.
 116     ~wxXmlResource();
 117
 118     // Loads resources from XML files that match given filemask.
 119     // This method understands VFS (see filesys.h).
 120     bool Load(const wxString& filemask);
 121
 122     // Initialize handlers for all supported controls/windows. This will
 123     // make the executable quite big because it forces linking against
 124     // most of the wxWindows library.
 125     void InitAllHandlers();
 126
 127     // Initialize only a specific handler (or custom handler). Convention says
 128     // that handler name is equal to the control's name plus 'XmlHandler', for example
 129     // wxTextCtrlXmlHandler, wxHtmlWindowXmlHandler. The XML resource compiler
 130     // (xmlres) can create include file that contains initialization code for
 131     // all controls used within the resource.
 132     void AddHandler(wxXmlResourceHandler *handler);
 133
 134     // Add a new handler at the begining of the handler list
 135     void InsertHandler(wxXmlResourceHandler *handler);
 136
 137     // Removes all handlers
 138     void ClearHandlers();
 139
 140     // Registers subclasses factory for use in XRC. This function is not meant
 141     // for public use, please see the comment above wxXmlSubclassFactory
 142     // definition.
 143     static void AddSubclassFactory(wxXmlSubclassFactory *factory);
 144
 145     // Loads menu from resource. Returns NULL on failure.
 146     wxMenu *LoadMenu(const wxString& name);
 147
 148     // Loads menubar from resource. Returns NULL on failure.
 149     wxMenuBar *LoadMenuBar(wxWindow *parent, const wxString& name);
 150
 151     // Loads menubar from resource. Returns NULL on failure.
 152     wxMenuBar *LoadMenuBar(const wxString& name) { return LoadMenuBar(NULL, name); }
 153
 154 #if wxUSE_TOOLBAR
 155     // Loads a toolbar.
 156     wxToolBar *LoadToolBar(wxWindow *parent, const wxString& name);
 157 #endif
 158
 159     // Loads a dialog. dlg points to parent window (if any).
 160     wxDialog *LoadDialog(wxWindow *parent, const wxString& name);
 161
 162     // Loads a dialog. dlg points to parent window (if any). This form
 163     // is used to finish creation of already existing instance (main reason
 164     // for this is that you may want to use derived class with new event table)
 165     // Example (typical usage):
 166     //      MyDialog dlg;
 167     //      wxTheXmlResource->LoadDialog(&dlg, mainFrame, "my_dialog");
 168     //      dlg->ShowModal();
 169     bool LoadDialog(wxDialog *dlg, wxWindow *parent, const wxString& name);
 170
 171     // Loads a panel. panel points to parent window (if any).
 172     wxPanel *LoadPanel(wxWindow *parent, const wxString& name);
 173
 174     // Loads a panel. panel points to parent window (if any). This form
 175     // is used to finish creation of already existing instance.
 176     bool LoadPanel(wxPanel *panel, wxWindow *parent, const wxString& name);
 177
 178     // Loads a frame.
 179     wxFrame *LoadFrame(wxWindow* parent, const wxString& name);
 180     bool LoadFrame(wxFrame* frame, wxWindow *parent, const wxString& name);
 181
 182     // Load an object from the resource specifying both the resource name and
 183     // the classname.  This lets you load nonstandard container windows.
 184     wxObject *LoadObject(wxWindow *parent, const wxString& name,
 185                          const wxString& classname);
 186
 187     // Load an object from the resource specifying both the resource name and
 188     // the classname.  This form lets you finish the creation of an existing
 189     // instance.
 190     bool LoadObject(wxObject *instance, wxWindow *parent, const wxString& name,
 191                     const wxString& classname);
 192
 193     // Loads a bitmap resource from a file.
 194     wxBitmap LoadBitmap(const wxString& name);
 195
 196     // Loads an icon resource from a file.
 197     wxIcon LoadIcon(const wxString& name);
 198
 199     // Attaches an unknown control to the given panel/window/dialog.
 200     // Unknown controls are used in conjunction with <object class="unknown">.
 201     bool AttachUnknownControl(const wxString& name, wxWindow *control,
 202                               wxWindow *parent = NULL);
 203
 204     // Returns a numeric ID that is equivalent to the string id used in an XML
 205     // resource. To be used in event tables.
 206     // Macro XRCID is provided for convenience
 207     static int GetXRCID(const wxChar *str_id);
 208
 209     // Returns version information (a.b.c.d = d+ 256*c + 256^2*b + 256^3*a).
 210     long GetVersion() const { return m_version; }
 211
 212     // Compares resources version to argument. Returns -1 if resources version
 213     // is less than the argument, +1 if greater and 0 if they equal.
 214     int CompareVersion(int major, int minor, int release, int revision) const
 215         { return GetVersion() -
 216                  (major*256*256*256 + minor*256*256 + release*256 + revision); }
 217
 218 //// Singleton accessors.
 219
 220     // Gets the global resources object or creates one if none exists.
 221     static wxXmlResource *Get();
 222
 223     // Sets the global resources object and returns a pointer to the previous one (may be NULL).
 224     static wxXmlResource *Set(wxXmlResource *res);
 225
 226     // Returns flags, which may be a bitlist of wxXRC_USE_LOCALE and wxXRC_NO_SUBCLASSING.
 227     int GetFlags() const { return m_flags; }
 228     // Set flags after construction.
 229     void SetFlags(int flags) { m_flags = flags; }
 230
 231 protected:
 232     // Scans the resources list for unloaded files and loads them. Also reloads
 233     // files that have been modified since last loading.
 234     void UpdateResources();
 235
 236     // Finds a resource (calls UpdateResources) and returns a node containing it.
 237     wxXmlNode *FindResource(const wxString& name, const wxString& classname, bool recursive = FALSE);
 238
 239     // Helper function: finds a resource (calls UpdateResources) and returns a node containing it.
 240     wxXmlNode *DoFindResource(wxXmlNode *parent, const wxString& name, const wxString& classname, bool recursive);
 241
 242     // Creates a resource from information in the given node
 243     // (Uses only 'handlerToUse' if != NULL)
 244     wxObject *CreateResFromNode(wxXmlNode *node, wxObject *parent,
 245                                 wxObject *instance = NULL,
 246                                 wxXmlResourceHandler *handlerToUse = NULL);
 247
 248 private:
 249     long m_version;
 250
 251     int m_flags;
 252     wxList m_handlers;
 253     wxXmlResourceDataRecords m_data;
 254 #if wxUSE_FILESYSTEM
 255     wxFileSystem m_curFileSystem;
 256     wxFileSystem& GetCurFileSystem() { return m_curFileSystem; }
 257 #endif
 258
 259     friend class wxXmlResourceHandler;
 260     friend class wxXmlResourceModule;
 261
 262     static wxXmlSubclassFactoriesList *ms_subclassFactories;
 263
 264     // singleton instance:
 265     static wxXmlResource *ms_instance;
 266 };
 267
 268
 269 // This macro translates string identifier (as used in XML resource,
 270 // e.g. <menuitem id="my_menu">...</menuitem>) to integer id that is needed by
 271 // wxWindows event tables.
 272 // Example:
 273 //    BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 274 //       EVT_MENU(XRCID("quit"), MyFrame::OnQuit)
 275 //       EVT_MENU(XRCID("about"), MyFrame::OnAbout)
 276 //       EVT_MENU(XRCID("new"), MyFrame::OnNew)
 277 //       EVT_MENU(XRCID("open"), MyFrame::OnOpen)
 278 //    END_EVENT_TABLE()
 279
 280 #define XRCID(str_id) \
 281     wxXmlResource::GetXRCID(wxT(str_id))
 282
 283
 284 // This macro returns pointer to particular control in dialog
 285 // created using XML resources. You can use it to set/get values from
 286 // controls.
 287 // Example:
 288 //    wxDialog dlg;
 289 //    wxXmlResource::Get()->LoadDialog(&dlg, mainFrame, "my_dialog");
 290 //    XRCCTRL(dlg, "my_textctrl", wxTextCtrl)->SetValue(wxT("default value"));
 291
 292 #ifdef __WXDEBUG__
 293 #define XRCCTRL(window, id, type) \
 294     (wxDynamicCast((window).FindWindow(XRCID(id)), type))
 295 #else
 296 #define XRCCTRL(window, id, type) \
 297     ((type*)((window).FindWindow(XRCID(id))))
 298 #endif
 299
 300 // wxXmlResourceHandler is an abstract base class for resource handlers
 301 // capable of creating a control from an XML node.
 302
 303 class WXXMLDLLEXPORT wxXmlResourceHandler : public wxObject
 304 {
 305 public:
 306     // Constructor.
 307     wxXmlResourceHandler();
 308
 309     // Destructor.
 310     virtual ~wxXmlResourceHandler() {}
 311
 312     // Creates an object (menu, dialog, control, ...) from an XML node.
 313     // Should check for validity.
 314     // parent is a higher-level object (usually window, dialog or panel)
 315     // that is often neccessary to create the resource.
 316     // If instance is non-NULL it should not create a new instance via 'new' but
 317     // should rather use this one, and call its Create method.
 318     wxObject *CreateResource(wxXmlNode *node, wxObject *parent,
 319                              wxObject *instance);
 320
 321     // This one is called from CreateResource after variables
 322     // were filled.
 323     virtual wxObject *DoCreateResource() = 0;
 324
 325     // Returns TRUE if it understands this node and can create
 326     // a resource from it, FALSE otherwise.
 327     virtual bool CanHandle(wxXmlNode *node) = 0;
 328
 329     // Sets the parent resource.
 330     void SetParentResource(wxXmlResource *res) { m_resource = res; }
 331
 332 protected:
 333     wxXmlResource *m_resource;
 334     wxArrayString m_styleNames;
 335     wxArrayInt m_styleValues;
 336
 337     // Variables (filled by CreateResource)
 338     wxXmlNode *m_node;
 339     wxString m_class;
 340     wxObject *m_parent, *m_instance;
 341     wxWindow *m_parentAsWindow, *m_instanceAsWindow;
 342
 343     // --- Handy methods:
 344
 345     // Returns true if the node has a property class equal to classname,
 346     // e.g. <object class="wxDialog">.
 347     bool IsOfClass(wxXmlNode *node, const wxString& classname)
 348         { return node->GetPropVal(wxT("class"), wxEmptyString) == classname; }
 349
 350     // Gets node content from wxXML_ENTITY_NODE
 351     // The problem is, <tag>content<tag> is represented as
 352     // wxXML_ENTITY_NODE name="tag", content=""
 353     //    |-- wxXML_TEXT_NODE or
 354     //        wxXML_CDATA_SECTION_NODE name="" content="content"
 355     wxString GetNodeContent(wxXmlNode *node);
 356
 357     // Check to see if a parameter exists.
 358     bool HasParam(const wxString& param);
 359
 360     // Finds the node or returns NULL.
 361     wxXmlNode *GetParamNode(const wxString& param);
 362
 363     // Finds the parameter value or returns the empty string.
 364     wxString GetParamValue(const wxString& param);
 365
 366     // Add a style flag (e.g. wxMB_DOCKABLE) to the list of flags
 367     // understood by this handler.
 368     void AddStyle(const wxString& name, int value);
 369
 370     // Add styles common to all wxWindow-derived classes.
 371     void AddWindowStyles();
 372
 373     // Gets style flags from text in form "flag | flag2| flag3 |..."
 374     // Only understads flags added with AddStyle
 375     int GetStyle(const wxString& param = wxT("style"), int defaults = 0);
 376
 377     // Gets text from param and does some conversions:
 378     // - replaces \n, \r, \t by respective chars (according to C syntax)
 379     // - replaces _ by & and __ by _ (needed for _File => &File because of XML)
 380     // - calls wxGetTranslations (unless disabled in wxXmlResource)
 381     wxString GetText(const wxString& param, bool translate = TRUE);
 382
 383     // Returns the XRCID.
 384     int GetID();
 385
 386     // Returns the resource name.
 387     wxString GetName();
 388
 389     // Gets a bool flag (1, t, yes, on, true are TRUE, everything else is FALSE).
 390     bool GetBool(const wxString& param, bool defaultv = FALSE);
 391
 392     // Gets the integer value from the parameter.
 393     long GetLong( const wxString& param, long defaultv = 0 );
 394
 395     // Gets colour in HTML syntax (#RRGGBB).
 396     wxColour GetColour(const wxString& param);
 397
 398     // Gets the size (may be in dialog units).
 399     wxSize GetSize(const wxString& param = wxT("size"));
 400
 401     // Gets the position (may be in dialog units).
 402     wxPoint GetPosition(const wxString& param = wxT("pos"));
 403
 404     // Gets a dimension (may be in dialog units).
 405     wxCoord GetDimension(const wxString& param, wxCoord defaultv = 0);
 406
 407     // Gets a bitmap.
 408     wxBitmap GetBitmap(const wxString& param = wxT("bitmap"),
 409                        const wxArtClient& defaultArtClient = wxART_OTHER,
 410                        wxSize size = wxDefaultSize);
 411
 412     // Gets an icon.
 413     wxIcon GetIcon(const wxString& param = wxT("icon"),
 414                    const wxArtClient& defaultArtClient = wxART_OTHER,
 415                    wxSize size = wxDefaultSize);
 416
 417     // Gets a font.
 418     wxFont GetFont(const wxString& param = wxT("font"));
 419
 420     // Sets common window options.
 421     void SetupWindow(wxWindow *wnd);
 422
 423     // Creates children.
 424     void CreateChildren(wxObject *parent, bool this_hnd_only = FALSE);
 425
 426     // Helper function.
 427     void CreateChildrenPrivately(wxObject *parent, wxXmlNode *rootnode = NULL);
 428
 429     // Creates a resource from a node.
 430     wxObject *CreateResFromNode(wxXmlNode *node,
 431                                 wxObject *parent, wxObject *instance = NULL)
 432         { return m_resource->CreateResFromNode(node, parent, instance); }
 433
 434     // helper
 435 #if wxUSE_FILESYSTEM
 436     wxFileSystem& GetCurFileSystem() { return m_resource->GetCurFileSystem(); }
 437 #endif
 438 };
 439
 440
 441 // Programmer-friendly macros for writing XRC handlers:
 442
 443 #define XRC_ADD_STYLE(style) AddStyle(wxT(#style), style)
 444
 445 #define XRC_MAKE_INSTANCE(variable, classname) \
 446    classname *variable = NULL; \
 447    if (m_instance) \
 448        variable = wxStaticCast(m_instance, classname); \
 449    if (!variable) \
 450        variable = new classname;
 451
 452
 453 // FIXME -- remove this $%^#$%#$@# as soon as Ron checks his changes in!!
 454 void wxXmlInitResourceModule();
 455
 456
 457 // This class is used to create instances of XRC "object" nodes with "subclass"
 458 // property. It is _not_ supposed to be used by XRC users, you should instead
 459 // register your subclasses via wxWindows' RTTI mechanism. This class is useful
 460 // only for language bindings developer who need a way to implement subclassing
 461 // in wxWindows ports that don't support wxRTTI (e.g. wxPython).
 462 class WXXMLDLLEXPORT wxXmlSubclassFactory
 463 {
 464 public:
 465     // Try to create instance of given class and return it, return NULL on failure:
 466     virtual wxObject *Create(const wxString& className) = 0;
 467     virtual ~wxXmlSubclassFactory() {}
 468 };
 469
 470
 471 /* -------------------------------------------------------------------------
 472    Backward compatibility macros. Do *NOT* use, they may disappear in future
 473    versions of the XRC library!
 474    ------------------------------------------------------------------------- */
 475 #define ADD_STYLE         XRC_ADD_STYLE
 476 #define wxTheXmlResource  wxXmlResource::Get()
 477 #define XMLID             XRCID
 478 #define XMLCTRL           XRCCTRL
 479 #define GetXMLID          GetXRCID
 480
 481
 482 #endif // _WX_XMLRES_H_