include/wx/xrc/xmlres.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/xrc/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 #include "wx/defs.h"
  15
  16 #if wxUSE_XRC
  17
  18 #include "wx/string.h"
  19 #include "wx/dynarray.h"
  20 #include "wx/datetime.h"
  21 #include "wx/list.h"
  22 #include "wx/gdicmn.h"
  23 #include "wx/filesys.h"
  24 #include "wx/bitmap.h"
  25 #include "wx/icon.h"
  26 #include "wx/artprov.h"
  27
  28 #include "wx/xml/xml.h"
  29
  30 class WXDLLEXPORT wxMenu;
  31 class WXDLLEXPORT wxMenuBar;
  32 class WXDLLEXPORT wxDialog;
  33 class WXDLLEXPORT wxPanel;
  34 class WXDLLEXPORT wxWindow;
  35 class WXDLLEXPORT wxFrame;
  36 class WXDLLEXPORT wxToolBar;
  37
  38 class WXDLLIMPEXP_XRC wxXmlResourceHandler;
  39 class WXDLLIMPEXP_XRC wxXmlSubclassFactory;
  40 class WXDLLIMPEXP_XRC wxXmlSubclassFactoriesList;
  41 class wxXmlResourceModule;
  42
  43
  44 // These macros indicate current version of XML resources (this information is
  45 // encoded in root node of XRC file as "version" property).
  46 //
  47 // Rules for increasing version number:
  48 //   - change it only if you made incompatible change to the format. Addition
  49 //     of new attribute to control handler is _not_ incompatible change, because
  50 //     older versions of the library may ignore it.
  51 //   - if you change version number, follow these steps:
  52 //       - set major, minor and release numbers to respective version numbers of
  53 //         the wxWidgets library (see wx/version.h)
  54 //       - reset revision to 0 unless the first three are same as before,
  55 //         in which case you should increase revision by one
  56 #define WX_XMLRES_CURRENT_VERSION_MAJOR            2
  57 #define WX_XMLRES_CURRENT_VERSION_MINOR            5
  58 #define WX_XMLRES_CURRENT_VERSION_RELEASE          3
  59 #define WX_XMLRES_CURRENT_VERSION_REVISION         0
  60 #define WX_XMLRES_CURRENT_VERSION_STRING       _T("2.5.3.0")
  61
  62 #define WX_XMLRES_CURRENT_VERSION \
  63                 (WX_XMLRES_CURRENT_VERSION_MAJOR * 256*256*256 + \
  64                  WX_XMLRES_CURRENT_VERSION_MINOR * 256*256 + \
  65                  WX_XMLRES_CURRENT_VERSION_RELEASE * 256 + \
  66                  WX_XMLRES_CURRENT_VERSION_REVISION)
  67
  68 class WXDLLIMPEXP_XRC wxXmlResourceDataRecord
  69 {
  70 public:
  71     wxXmlResourceDataRecord() : Doc(NULL) {
  72 #if wxUSE_DATETIME
  73         Time = wxDateTime::Now();
  74 #endif
  75     }
  76     ~wxXmlResourceDataRecord() {delete Doc;}
  77
  78     wxString File;
  79     wxXmlDocument *Doc;
  80 #if wxUSE_DATETIME
  81     wxDateTime Time;
  82 #endif
  83 };
  84
  85
  86 WX_DECLARE_USER_EXPORTED_OBJARRAY(wxXmlResourceDataRecord,
  87                                   wxXmlResourceDataRecords,
  88                                   WXDLLIMPEXP_XRC);
  89
  90 enum wxXmlResourceFlags
  91 {
  92     wxXRC_USE_LOCALE     = 1,
  93     wxXRC_NO_SUBCLASSING = 2,
  94     wxXRC_NO_RELOADING   = 4
  95 };
  96
  97 // This class holds XML resources from one or more .xml files
  98 // (or derived forms, either binary or zipped -- see manual for
  99 // details).
 100 class WXDLLIMPEXP_XRC wxXmlResource : public wxObject
 101 {
 102 public:
 103     // Constructor.
 104     // Flags: wxXRC_USE_LOCALE
 105     //              translatable strings will be translated via _()
 106     //        wxXRC_NO_SUBCLASSING
 107     //              subclass property of object nodes will be ignored
 108     //              (useful for previews in XRC editors)
 109     //        wxXRC_NO_RELOADING
 110     //              don't check the modification time of the XRC files and
 111     //              reload them if they have changed on disk
 112     wxXmlResource(int flags = wxXRC_USE_LOCALE);
 113
 114     // Constructor.
 115     // Flags: wxXRC_USE_LOCALE
 116     //              translatable strings will be translated via _()
 117     //        wxXRC_NO_SUBCLASSING
 118     //              subclass property of object nodes will be ignored
 119     //              (useful for previews in XRC editors)
 120     wxXmlResource(const wxString& filemask, int flags = wxXRC_USE_LOCALE);
 121
 122     // Destructor.
 123     ~wxXmlResource();
 124
 125     // Loads resources from XML files that match given filemask.
 126     // This method understands VFS (see filesys.h).
 127     bool Load(const wxString& filemask);
 128
 129     // Unload resource from the given XML file (wildcards not allowed)
 130     bool Unload(const wxString& filename);
 131
 132     // Initialize handlers for all supported controls/windows. This will
 133     // make the executable quite big because it forces linking against
 134     // most of the wxWidgets library.
 135     void InitAllHandlers();
 136
 137     // Initialize only a specific handler (or custom handler). Convention says
 138     // that handler name is equal to the control's name plus 'XmlHandler', for
 139     // example wxTextCtrlXmlHandler, wxHtmlWindowXmlHandler. The XML resource
 140     // compiler (xmlres) can create include file that contains initialization
 141     // code for all controls used within the resource.
 142     void AddHandler(wxXmlResourceHandler *handler);
 143
 144     // Add a new handler at the begining of the handler list
 145     void InsertHandler(wxXmlResourceHandler *handler);
 146
 147     // Removes all handlers
 148     void ClearHandlers();
 149
 150     // Registers subclasses factory for use in XRC. This function is not meant
 151     // for public use, please see the comment above wxXmlSubclassFactory
 152     // definition.
 153     static void AddSubclassFactory(wxXmlSubclassFactory *factory);
 154
 155     // Loads menu from resource. Returns NULL on failure.
 156     wxMenu *LoadMenu(const wxString& name);
 157
 158     // Loads menubar from resource. Returns NULL on failure.
 159     wxMenuBar *LoadMenuBar(wxWindow *parent, const wxString& name);
 160
 161     // Loads menubar from resource. Returns NULL on failure.
 162     wxMenuBar *LoadMenuBar(const wxString& name) { return LoadMenuBar(NULL, name); }
 163
 164 #if wxUSE_TOOLBAR
 165     // Loads a toolbar.
 166     wxToolBar *LoadToolBar(wxWindow *parent, const wxString& name);
 167 #endif
 168
 169     // Loads a dialog. dlg points to parent window (if any).
 170     wxDialog *LoadDialog(wxWindow *parent, const wxString& name);
 171
 172     // Loads a dialog. dlg points to parent window (if any). This form
 173     // is used to finish creation of already existing instance (main reason
 174     // for this is that you may want to use derived class with new event table)
 175     // Example (typical usage):
 176     //      MyDialog dlg;
 177     //      wxTheXmlResource->LoadDialog(&dlg, mainFrame, "my_dialog");
 178     //      dlg->ShowModal();
 179     bool LoadDialog(wxDialog *dlg, wxWindow *parent, const wxString& name);
 180
 181     // Loads a panel. panel points to parent window (if any).
 182     wxPanel *LoadPanel(wxWindow *parent, const wxString& name);
 183
 184     // Loads a panel. panel points to parent window (if any). This form
 185     // is used to finish creation of already existing instance.
 186     bool LoadPanel(wxPanel *panel, wxWindow *parent, const wxString& name);
 187
 188     // Loads a frame.
 189     wxFrame *LoadFrame(wxWindow* parent, const wxString& name);
 190     bool LoadFrame(wxFrame* frame, wxWindow *parent, const wxString& name);
 191
 192     // Load an object from the resource specifying both the resource name and
 193     // the classname.  This lets you load nonstandard container windows.
 194     wxObject *LoadObject(wxWindow *parent, const wxString& name,
 195                          const wxString& classname);
 196
 197     // Load an object from the resource specifying both the resource name and
 198     // the classname.  This form lets you finish the creation of an existing
 199     // instance.
 200     bool LoadObject(wxObject *instance, wxWindow *parent, const wxString& name,
 201                     const wxString& classname);
 202
 203     // Loads a bitmap resource from a file.
 204     wxBitmap LoadBitmap(const wxString& name);
 205
 206     // Loads an icon resource from a file.
 207     wxIcon LoadIcon(const wxString& name);
 208
 209     // Attaches an unknown control to the given panel/window/dialog.
 210     // Unknown controls are used in conjunction with <object class="unknown">.
 211     bool AttachUnknownControl(const wxString& name, wxWindow *control,
 212                               wxWindow *parent = NULL);
 213
 214     // Returns a numeric ID that is equivalent to the string ID used in an XML
 215     // resource. If an unknown str_id is requested (i.e. other than wxID_XXX
 216     // or integer), a new record is created which associates the given string
 217     // with a number. If value_if_not_found == wxID_NONE, the number is obtained via
 218     // wxNewId(). Otherwise value_if_not_found is used.
 219     // Macro XRCID(name) is provided for convenient use in event tables.
 220     static int GetXRCID(const wxChar *str_id, int value_if_not_found = wxID_NONE);
 221
 222     // Returns version information (a.b.c.d = d+ 256*c + 256^2*b + 256^3*a).
 223     long GetVersion() const { return m_version; }
 224
 225     // Compares resources version to argument. Returns -1 if resources version
 226     // is less than the argument, +1 if greater and 0 if they equal.
 227     int CompareVersion(int major, int minor, int release, int revision) const
 228         { return GetVersion() -
 229                  (major*256*256*256 + minor*256*256 + release*256 + revision); }
 230
 231 //// Singleton accessors.
 232
 233     // Gets the global resources object or creates one if none exists.
 234     static wxXmlResource *Get();
 235
 236     // Sets the global resources object and returns a pointer to the previous one (may be NULL).
 237     static wxXmlResource *Set(wxXmlResource *res);
 238
 239     // Returns flags, which may be a bitlist of wxXRC_USE_LOCALE and wxXRC_NO_SUBCLASSING.
 240     int GetFlags() const { return m_flags; }
 241     // Set flags after construction.
 242     void SetFlags(int flags) { m_flags = flags; }
 243
 244 protected:
 245     // Scans the resources list for unloaded files and loads them. Also reloads
 246     // files that have been modified since last loading.
 247     bool UpdateResources();
 248
 249     // Finds a resource (calls UpdateResources) and returns a node containing it.
 250     wxXmlNode *FindResource(const wxString& name, const wxString& classname, bool recursive = false);
 251
 252     // Helper function: finds a resource (calls UpdateResources) and returns a node containing it.
 253     wxXmlNode *DoFindResource(wxXmlNode *parent, const wxString& name, const wxString& classname, bool recursive);
 254
 255     // Creates a resource from information in the given node
 256     // (Uses only 'handlerToUse' if != NULL)
 257     wxObject *CreateResFromNode(wxXmlNode *node, wxObject *parent,
 258                                 wxObject *instance = NULL,
 259                                 wxXmlResourceHandler *handlerToUse = NULL);
 260
 261     // Helper of Load() and Unload(): returns the URL corresponding to the
 262     // given file if it's indeed a file, otherwise returns the original string
 263     // unmodified
 264     static wxString ConvertFileNameToURL(const wxString& filename);
 265
 266     // loading resources from archives is impossible without wxFileSystem
 267 #if wxUSE_FILESYSTEM
 268     // Another helper: detect if the filename is a ZIP or XRS file
 269     static bool IsArchive(const wxString& filename);
 270 #endif // wxUSE_FILESYSTEM
 271
 272 private:
 273     long m_version;
 274
 275     int m_flags;
 276     wxList m_handlers;
 277     wxXmlResourceDataRecords m_data;
 278 #if wxUSE_FILESYSTEM
 279     wxFileSystem m_curFileSystem;
 280     wxFileSystem& GetCurFileSystem() { return m_curFileSystem; }
 281 #endif
 282
 283     friend class wxXmlResourceHandler;
 284     friend class wxXmlResourceModule;
 285
 286     static wxXmlSubclassFactoriesList *ms_subclassFactories;
 287
 288     // singleton instance:
 289     static wxXmlResource *ms_instance;
 290 };
 291
 292
 293 // This macro translates string identifier (as used in XML resource,
 294 // e.g. <menuitem id="my_menu">...</menuitem>) to integer id that is needed by
 295 // wxWidgets event tables.
 296 // Example:
 297 //    BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 298 //       EVT_MENU(XRCID("quit"), MyFrame::OnQuit)
 299 //       EVT_MENU(XRCID("about"), MyFrame::OnAbout)
 300 //       EVT_MENU(XRCID("new"), MyFrame::OnNew)
 301 //       EVT_MENU(XRCID("open"), MyFrame::OnOpen)
 302 //    END_EVENT_TABLE()
 303
 304 #define XRCID(str_id) \
 305     wxXmlResource::GetXRCID(wxT(str_id))
 306
 307
 308 // This macro returns pointer to particular control in dialog
 309 // created using XML resources. You can use it to set/get values from
 310 // controls.
 311 // Example:
 312 //    wxDialog dlg;
 313 //    wxXmlResource::Get()->LoadDialog(&dlg, mainFrame, "my_dialog");
 314 //    XRCCTRL(dlg, "my_textctrl", wxTextCtrl)->SetValue(wxT("default value"));
 315
 316 #define XRCCTRL(window, id, type) \
 317     (wxStaticCast((window).FindWindow(XRCID(id)), type))
 318
 319 // wxXmlResourceHandler is an abstract base class for resource handlers
 320 // capable of creating a control from an XML node.
 321
 322 class WXDLLIMPEXP_XRC wxXmlResourceHandler : public wxObject
 323 {
 324 DECLARE_ABSTRACT_CLASS(wxXmlResourceHandler)
 325 public:
 326     // Constructor.
 327     wxXmlResourceHandler();
 328
 329     // Destructor.
 330     virtual ~wxXmlResourceHandler() {}
 331
 332     // Creates an object (menu, dialog, control, ...) from an XML node.
 333     // Should check for validity.
 334     // parent is a higher-level object (usually window, dialog or panel)
 335     // that is often necessary to create the resource.
 336     // If instance is non-NULL it should not create a new instance via 'new' but
 337     // should rather use this one, and call its Create method.
 338     wxObject *CreateResource(wxXmlNode *node, wxObject *parent,
 339                              wxObject *instance);
 340
 341     // This one is called from CreateResource after variables
 342     // were filled.
 343     virtual wxObject *DoCreateResource() = 0;
 344
 345     // Returns true if it understands this node and can create
 346     // a resource from it, false otherwise.
 347     virtual bool CanHandle(wxXmlNode *node) = 0;
 348
 349     // Sets the parent resource.
 350     void SetParentResource(wxXmlResource *res) { m_resource = res; }
 351
 352 protected:
 353     wxXmlResource *m_resource;
 354     wxArrayString m_styleNames;
 355     wxArrayInt m_styleValues;
 356
 357     // Variables (filled by CreateResource)
 358     wxXmlNode *m_node;
 359     wxString m_class;
 360     wxObject *m_parent, *m_instance;
 361     wxWindow *m_parentAsWindow;
 362
 363     // --- Handy methods:
 364
 365     // Returns true if the node has a property class equal to classname,
 366     // e.g. <object class="wxDialog">.
 367     bool IsOfClass(wxXmlNode *node, const wxString& classname);
 368
 369     // Gets node content from wxXML_ENTITY_NODE
 370     // The problem is, <tag>content<tag> is represented as
 371     // wxXML_ENTITY_NODE name="tag", content=""
 372     //    |-- wxXML_TEXT_NODE or
 373     //        wxXML_CDATA_SECTION_NODE name="" content="content"
 374     wxString GetNodeContent(wxXmlNode *node);
 375
 376     // Check to see if a parameter exists.
 377     bool HasParam(const wxString& param);
 378
 379     // Finds the node or returns NULL.
 380     wxXmlNode *GetParamNode(const wxString& param);
 381
 382     // Finds the parameter value or returns the empty string.
 383     wxString GetParamValue(const wxString& param);
 384
 385     // Add a style flag (e.g. wxMB_DOCKABLE) to the list of flags
 386     // understood by this handler.
 387     void AddStyle(const wxString& name, int value);
 388
 389     // Add styles common to all wxWindow-derived classes.
 390     void AddWindowStyles();
 391
 392     // Gets style flags from text in form "flag | flag2| flag3 |..."
 393     // Only understands flags added with AddStyle
 394     int GetStyle(const wxString& param = wxT("style"), int defaults = 0);
 395
 396     // Gets text from param and does some conversions:
 397     // - replaces \n, \r, \t by respective chars (according to C syntax)
 398     // - replaces _ by & and __ by _ (needed for _File => &File because of XML)
 399     // - calls wxGetTranslations (unless disabled in wxXmlResource)
 400     wxString GetText(const wxString& param, bool translate = true);
 401
 402     // Returns the XRCID.
 403     int GetID();
 404
 405     // Returns the resource name.
 406     wxString GetName();
 407
 408     // Gets a bool flag (1, t, yes, on, true are true, everything else is false).
 409     bool GetBool(const wxString& param, bool defaultv = false);
 410
 411     // Gets an integer value from the parameter.
 412     long GetLong(const wxString& param, long defaultv = 0);
 413
 414     // Gets a float value from the parameter.
 415     float GetFloat(const wxString& param, float defaultv = 0);
 416
 417     // Gets colour in HTML syntax (#RRGGBB).
 418     wxColour GetColour(const wxString& param);
 419
 420     // Gets the size (may be in dialog units).
 421     wxSize GetSize(const wxString& param = wxT("size"),
 422                    wxWindow *windowToUse = NULL);
 423
 424     // Gets the position (may be in dialog units).
 425     wxPoint GetPosition(const wxString& param = wxT("pos"));
 426
 427     // Gets a dimension (may be in dialog units).
 428     wxCoord GetDimension(const wxString& param, wxCoord defaultv = 0,
 429                          wxWindow *windowToUse = NULL);
 430
 431     // Gets a bitmap.
 432     wxBitmap GetBitmap(const wxString& param = wxT("bitmap"),
 433                        const wxArtClient& defaultArtClient = wxART_OTHER,
 434                        wxSize size = wxDefaultSize);
 435
 436     // Gets an icon.
 437     wxIcon GetIcon(const wxString& param = wxT("icon"),
 438                    const wxArtClient& defaultArtClient = wxART_OTHER,
 439                    wxSize size = wxDefaultSize);
 440
 441     // Gets a font.
 442     wxFont GetFont(const wxString& param = wxT("font"));
 443
 444     // Sets common window options.
 445     void SetupWindow(wxWindow *wnd);
 446
 447     // Creates children.
 448     void CreateChildren(wxObject *parent, bool this_hnd_only = false);
 449
 450     // Helper function.
 451     void CreateChildrenPrivately(wxObject *parent, wxXmlNode *rootnode = NULL);
 452
 453     // Creates a resource from a node.
 454     wxObject *CreateResFromNode(wxXmlNode *node,
 455                                 wxObject *parent, wxObject *instance = NULL)
 456         { return m_resource->CreateResFromNode(node, parent, instance); }
 457
 458     // helper
 459 #if wxUSE_FILESYSTEM
 460     wxFileSystem& GetCurFileSystem() { return m_resource->GetCurFileSystem(); }
 461 #endif
 462 };
 463
 464
 465 // Programmer-friendly macros for writing XRC handlers:
 466
 467 #define XRC_ADD_STYLE(style) AddStyle(wxT(#style), style)
 468
 469 #define XRC_MAKE_INSTANCE(variable, classname) \
 470    classname *variable = NULL; \
 471    if (m_instance) \
 472        variable = wxStaticCast(m_instance, classname); \
 473    if (!variable) \
 474        variable = new classname;
 475
 476
 477 // FIXME -- remove this $%^#$%#$@# as soon as Ron checks his changes in!!
 478 WXDLLIMPEXP_XRC void wxXmlInitResourceModule();
 479
 480
 481 // This class is used to create instances of XRC "object" nodes with "subclass"
 482 // property. It is _not_ supposed to be used by XRC users, you should instead
 483 // register your subclasses via wxWidgets' RTTI mechanism. This class is useful
 484 // only for language bindings developer who need a way to implement subclassing
 485 // in wxWidgets ports that don't support wxRTTI (e.g. wxPython).
 486 class WXDLLIMPEXP_XRC wxXmlSubclassFactory
 487 {
 488 public:
 489     // Try to create instance of given class and return it, return NULL on
 490     // failure:
 491     virtual wxObject *Create(const wxString& className) = 0;
 492     virtual ~wxXmlSubclassFactory() {}
 493 };
 494
 495
 496 /* -------------------------------------------------------------------------
 497    Backward compatibility macros. Do *NOT* use, they may disappear in future
 498    versions of the XRC library!
 499    ------------------------------------------------------------------------- */
 500 #if WXWIN_COMPATIBILITY_2_4
 501     #define ADD_STYLE         XRC_ADD_STYLE
 502     #define wxTheXmlResource  wxXmlResource::Get()
 503     #define XMLID             XRCID
 504     #define XMLCTRL           XRCCTRL
 505     #define GetXMLID          GetXRCID
 506 #endif
 507
 508 #endif // wxUSE_XRC
 509
 510 #endif // _WX_XMLRES_H_