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 #ifdef __GNUG__
  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
  28 #include "wx/xrc/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 WXXMLDLLEXPORT wxXmlResourceHandler;
  39
  40
  41 // These macros indicate current version of XML resources (this information is
  42 // encoded in root node of XRC file as "version" property).
  43 //
  44 // Rules for increasing version number:
  45 //   - change it only if you made incompatible change to the format. Addition of new
  46 //     attribute to control handler is _not_ incompatible change, because older
  47 //     versions of the library may ignore it.
  48 //   - if you change version number, follow these steps:
  49 //       - set major, minor and release numbers to respective version numbers of
  50 //         the wxWindows library (see wx/version.h)
  51 //       - reset revision to 0 unless the first three are same as before, in which
  52 //         case you should increase revision by one
  53 #define WX_XMLRES_CURRENT_VERSION_MAJOR            2
  54 #define WX_XMLRES_CURRENT_VERSION_MINOR            3
  55 #define WX_XMLRES_CURRENT_VERSION_RELEASE          0
  56 #define WX_XMLRES_CURRENT_VERSION_REVISION         1
  57 #define WX_XMLRES_CURRENT_VERSION_STRING    "2.3.0.1"
  58
  59 #define WX_XMLRES_CURRENT_VERSION \
  60                 (WX_XMLRES_CURRENT_VERSION_MAJOR * 256*256*256 + \
  61                  WX_XMLRES_CURRENT_VERSION_MINOR * 256*256 + \
  62                  WX_XMLRES_CURRENT_VERSION_RELEASE * 256 + \
  63                  WX_XMLRES_CURRENT_VERSION_REVISION)
  64
  65 class WXXMLDLLEXPORT wxXmlResourceDataRecord
  66 {
  67 public:
  68     wxXmlResourceDataRecord() : Doc(NULL), Time(wxDateTime::Now()) {}
  69     ~wxXmlResourceDataRecord() {delete Doc;}
  70
  71     wxString File;
  72     wxXmlDocument *Doc;
  73     wxDateTime Time;
  74 };
  75
  76
  77 #ifdef WXXMLISDLL
  78 WX_DECLARE_EXPORTED_OBJARRAY(wxXmlResourceDataRecord, wxXmlResourceDataRecords);
  79 #else
  80 WX_DECLARE_OBJARRAY(wxXmlResourceDataRecord, wxXmlResourceDataRecords);
  81 #endif
  82
  83
  84 // This class holds XML resources from one or more .xml files
  85 // (or derived forms, either binary or zipped -- see manual for
  86 // details).
  87
  88 class WXXMLDLLEXPORT wxXmlResource : public wxObject
  89 {
  90 public:
  91     // Ctor. If use_locale is TRUE, translatable strings are
  92     // translated via _(). You can disable it by passing use_locale=FALSE
  93     // (for example if you provide resource file for each locale)
  94     wxXmlResource(bool use_locale = TRUE);
  95     wxXmlResource(const wxString& filemask, bool use_locale = TRUE);
  96     ~wxXmlResource();
  97
  98     // Loads resources from XML files that match given filemask.
  99     // This method understands VFS (see filesys.h).
 100     bool Load(const wxString& filemask);
 101
 102     // Initialize handlers for all supported controls/windows. This will
 103     // make the executable quite big because it forces linking against
 104     // most of wxWin library
 105     void InitAllHandlers();
 106
 107     // Initialize only specific handler (or custom handler). Convention says
 108     // that handler name is equal to control's name plus 'XmlHandler', e.g.
 109     // wxTextCtrlXmlHandler, wxHtmlWindowXmlHandler. XML resource compiler
 110     // (xmlres) can create include file that contains initialization code for
 111     // all controls used within the resource.
 112     void AddHandler(wxXmlResourceHandler *handler);
 113
 114     // Removes all handlers
 115     void ClearHandlers();
 116
 117     // Loads menu from resource. Returns NULL on failure.
 118     wxMenu *LoadMenu(const wxString& name);
 119
 120     // Loads menubar from resource. Returns NULL on failure.
 121     wxMenuBar *LoadMenuBar(const wxString& name);
 122
 123 #if wxUSE_TOOLBAR
 124     // Loads toolbar
 125     wxToolBar *LoadToolBar(wxWindow *parent, const wxString& name);
 126 #endif
 127
 128     // Loads dialog. dlg points to parent window (if any). Second form
 129     // is used to finish creation of already existing instance (main reason
 130     // for this is that you may want to use derived class with new event table)
 131     // Example (typical usage):
 132     //      MyDialog dlg;
 133     //      wxTheXmlResource->LoadDialog(&dlg, mainFrame, "my_dialog");
 134     //      dlg->ShowModal();
 135     wxDialog *LoadDialog(wxWindow *parent, const wxString& name);
 136     bool LoadDialog(wxDialog *dlg, wxWindow *parent, const wxString& name);
 137
 138     // Loads panel. panel points to parent window (if any). Second form
 139     // is used to finish creation of already existing instance.
 140     wxPanel *LoadPanel(wxWindow *parent, const wxString& name);
 141     bool LoadPanel(wxPanel *panel, wxWindow *parent, const wxString& name);
 142
 143     bool LoadFrame(wxFrame* frame, wxWindow *parent, const wxString& name);
 144
 145     // Loads bitmap or icon resource from file:
 146     wxBitmap LoadBitmap(const wxString& name);
 147     wxIcon LoadIcon(const wxString& name);
 148
 149     // Attaches unknown control into given panel/window/dialog:
 150     // (unknown controls are used in conjunction with <object class="unknown">)
 151     bool AttachUnknownControl(const wxString& name, wxWindow *control,
 152                               wxWindow *parent = NULL);
 153
 154     // Returns numeric ID that is equivalent to string id used in XML
 155     // resource. To be used in event tables
 156     // Macro XMLID is provided for convenience
 157     static int GetXMLID(const wxChar *str_id);
 158
 159     // Returns version info (a.b.c.d = d+ 256*c + 256^2*b + 256^3*a)
 160     long GetVersion() const { return m_version; }
 161
 162     // Compares resources version to argument. Returns -1 if resources version
 163     // is less than the argument, +1 if greater and 0 if they equal.
 164     int CompareVersion(int major, int minor, int release, int revision) const
 165         { return GetVersion() -
 166                  (major*256*256*256 + minor*256*256 + release*256 + revision); }
 167
 168 protected:
 169     // Scans resources list for unloaded files and loads them. Also reloads
 170     // files that have been modified since last loading.
 171     void UpdateResources();
 172
 173     // Finds resource (calls UpdateResources) and returns node containing it
 174     wxXmlNode *FindResource(const wxString& name, const wxString& classname);
 175
 176     // Creates resource from info in given node:
 177     wxObject *CreateResFromNode(wxXmlNode *node, wxObject *parent, wxObject *instance = NULL);
 178
 179     bool GetUseLocale() { return m_useLocale; }
 180
 181 private:
 182     long m_version;
 183
 184     bool m_useLocale;
 185     wxList m_handlers;
 186     wxXmlResourceDataRecords m_data;
 187 #if wxUSE_FILESYSTEM
 188     wxFileSystem m_curFileSystem;
 189     wxFileSystem& GetCurFileSystem() { return m_curFileSystem; }
 190 #endif
 191
 192     friend class wxXmlResourceHandler;
 193 };
 194
 195
 196 // Global instance of resource class. For your convenience.
 197 extern WXXMLDLLEXPORT wxXmlResource *wxTheXmlResource;
 198
 199 // This macro translates string identifier (as used in XML resource,
 200 // e.g. <menuitem id="my_menu">...</menuitem>) to integer id that is needed by
 201 // wxWindows event tables.
 202 // Example:
 203 //    BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 204 //       EVT_MENU(XMLID("quit"), MyFrame::OnQuit)
 205 //       EVT_MENU(XMLID("about"), MyFrame::OnAbout)
 206 //       EVT_MENU(XMLID("new"), MyFrame::OnNew)
 207 //       EVT_MENU(XMLID("open"), MyFrame::OnOpen)
 208 //    END_EVENT_TABLE()
 209
 210 #define XMLID(str_id) \
 211     wxXmlResource::GetXMLID(wxT(str_id))
 212
 213
 214 // This macro returns pointer to particular control in dialog
 215 // created using XML resources. You can use it to set/get values from
 216 // controls.
 217 // Example:
 218 //    wxDialog dlg;
 219 //    wxTheXmlResource->LoadDialog(&dlg, mainFrame, "my_dialog");
 220 //    XMLCTRL(dlg, "my_textctrl", wxTextCtrl)->SetValue(wxT("default value"));
 221
 222 #ifdef __WXDEBUG__
 223 #define XMLCTRL(window, id, type) \
 224     (wxDynamicCast((window).FindWindow(XMLID(id)), type))
 225 #else
 226 #define XMLCTRL(window, id, type) \
 227     ((type*)((window).FindWindow(XMLID(id))))
 228 #endif
 229
 230
 231 class WXXMLDLLEXPORT wxXmlResourceHandler : public wxObject
 232 {
 233 public:
 234     wxXmlResourceHandler();
 235     virtual ~wxXmlResourceHandler() {}
 236
 237     // Creates object (menu, dialog, control, ...) from XML node.
 238     // Should check for validity.
 239     // parent is higher-level object (usually window, dialog or panel)
 240     // that is often neccessary to create resource
 241     // if instance != NULL it should not create new instance via 'new' but
 242     // rather use this one and call its Create method
 243     wxObject *CreateResource(wxXmlNode *node, wxObject *parent,
 244                              wxObject *instance);
 245
 246     // This one is called from CreateResource after variables
 247     // were filled
 248     virtual wxObject *DoCreateResource() = 0;
 249
 250     // Returns TRUE if it understands this node and can create
 251     // resource from it, FALSE otherwise.
 252     virtual bool CanHandle(wxXmlNode *node) = 0;
 253
 254     void SetParentResource(wxXmlResource *res) { m_resource = res; }
 255
 256
 257 protected:
 258
 259     wxXmlResource *m_resource;
 260     wxArrayString m_styleNames;
 261     wxArrayInt m_styleValues;
 262
 263     // Variables (filled by CreateResource)
 264     wxXmlNode *m_node;
 265     wxString m_class;
 266     wxObject *m_parent, *m_instance;
 267     wxWindow *m_parentAsWindow, *m_instanceAsWindow;
 268
 269     // --- Handy methods:
 270
 271     // Returns true if the node has property class equal to classname,
 272     // e.g. <object class="wxDialog">
 273     bool IsOfClass(wxXmlNode *node, const wxString& classname)
 274         { return node->GetPropVal(wxT("class"), wxEmptyString) == classname; }
 275
 276     // Gets node content from wxXML_ENTITY_NODE
 277     // (the problem is, <tag>content<tag> is represented as
 278     // wxXML_ENTITY_NODE name="tag", content=""
 279     //    |-- wxXML_TEXT_NODE or
 280     //        wxXML_CDATA_SECTION_NODE name="" content="content"
 281     wxString GetNodeContent(wxXmlNode *node);
 282
 283     // Check to see if a param exists
 284     bool HasParam(const wxString& param);
 285
 286     // Finds the node or returns NULL
 287     wxXmlNode *GetParamNode(const wxString& param);
 288     wxString GetParamValue(const wxString& param);
 289
 290     // Add style flag (e.g. wxMB_DOCKABLE) to list of flags
 291     // understood by this handler
 292     void AddStyle(const wxString& name, int value);
 293
 294     // Add styles common to all wxWindow-derived classes
 295     void AddWindowStyles();
 296
 297     // Gets style flags from text in form "flag | flag2| flag3 |..."
 298     // Only understads flags added with AddStyle
 299     int GetStyle(const wxString& param = wxT("style"), int defaults = 0);
 300
 301     // Gets text from param and does some convertions:
 302     // - replaces \n, \r, \t by respective chars (according to C syntax)
 303     // - replaces $ by & and $$ by $ (needed for $File => &File because of XML)
 304     // - calls wxGetTranslations (unless disabled in wxXmlResource)
 305     wxString GetText(const wxString& param);
 306
 307     // Return XMLID
 308     int GetID();
 309     wxString GetName();
 310
 311     // Get bool flag (1,t,yes,on,true are TRUE, everything else is FALSE)
 312     bool GetBool(const wxString& param, bool defaultv = FALSE);
 313
 314     // Get integer value from param
 315     long GetLong( const wxString& param, long defaultv = 0 );
 316
 317     // Get colour in HTML syntax (#RRGGBB)
 318     wxColour GetColour(const wxString& param);
 319
 320     // Get size/position (may be in dlg units):
 321     wxSize GetSize(const wxString& param = wxT("size"));
 322     wxPoint GetPosition(const wxString& param = wxT("pos"));
 323
 324     // Get dimension (may be in dlg units):
 325     wxCoord GetDimension(const wxString& param, wxCoord defaultv = 0);
 326
 327     // Get bitmap:
 328     wxBitmap GetBitmap(const wxString& param = wxT("bitmap"),
 329                        wxSize size = wxDefaultSize);
 330     wxIcon GetIcon(const wxString& param = wxT("icon"),
 331                    wxSize size = wxDefaultSize);
 332
 333     // Get font:
 334     wxFont GetFont(const wxString& param = wxT("font"));
 335
 336     // Sets common window options:
 337     void SetupWindow(wxWindow *wnd);
 338
 339     void CreateChildren(wxObject *parent, bool this_hnd_only = FALSE);
 340     void CreateChildrenPrivately(wxObject *parent, wxXmlNode *rootnode = NULL);
 341     wxObject *CreateResFromNode(wxXmlNode *node,
 342                                 wxObject *parent, wxObject *instance = NULL)
 343         { return m_resource->CreateResFromNode(node, parent, instance); }
 344
 345     // helper
 346 #if wxUSE_FILESYSTEM
 347     wxFileSystem& GetCurFileSystem() { return m_resource->GetCurFileSystem(); }
 348 #endif
 349 };
 350
 351 #define ADD_STYLE(style) AddStyle(wxT(#style), style)
 352
 353
 354 void wxXmlInitResourceModule();
 355
 356 #endif // _WX_XMLRES_H_