| | 1 | ///////////////////////////////////////////////////////////////////////////// |
| | 2 | // Name: virtual.cpp |
| | 3 | // Purpose: wxHtml sample: demonstrates virtual file systems feature |
| | 4 | // Author: ? |
| | 5 | // Modified by: |
| | 6 | // Created: ? |
| | 7 | // RCS-ID: $Id$ |
| | 8 | // Copyright: (c) wxWidgets team |
| | 9 | // Licence: wxWindows licence |
| | 10 | ///////////////////////////////////////////////////////////////////////////// |
| | 11 | |
| | 12 | // For compilers that support precompilation, includes "wx/wx.h". |
| | 13 | #include "wx/wxprec.h" |
| | 14 | |
| | 15 | #ifdef __BORLANDC__ |
| | 16 | #pragma hdrstop |
| | 17 | #endif |
| | 18 | |
| | 19 | // for all others, include the necessary headers (this file is usually all you |
| | 20 | // need because it includes almost all "standard" wxWidgets headers |
| | 21 | #ifndef WX_PRECOMP |
| | 22 | #include "wx/wx.h" |
| | 23 | #endif |
| | 24 | |
| | 25 | #include "wx/html/htmlwin.h" |
| | 26 | |
| | 27 | #ifndef wxHAS_IMAGES_IN_RESOURCES |
| | 28 | #include "../../sample.xpm" |
| | 29 | #endif |
| | 30 | |
| | 31 | // new handler class: |
| | 32 | |
| | 33 | #include "wx/wfstream.h" |
| | 34 | #include "wx/mstream.h" |
| | 35 | |
| | 36 | |
| | 37 | // ---------------------------------------------------------------------------- |
| | 38 | // MyVFS |
| | 39 | // ---------------------------------------------------------------------------- |
| | 40 | |
| | 41 | class MyVFS : public wxFileSystemHandler |
| | 42 | { |
| | 43 | public: |
| | 44 | MyVFS() : wxFileSystemHandler() {} |
| | 45 | |
| | 46 | wxFSFile* OpenFile(wxFileSystem& fs, const wxString& location); |
| | 47 | bool CanOpen(const wxString& location); |
| | 48 | }; |
| | 49 | |
| | 50 | bool MyVFS::CanOpen(const wxString& location) |
| | 51 | { |
| | 52 | return (GetProtocol(location) == wxT("myVFS")); |
| | 53 | } |
| | 54 | |
| | 55 | wxFSFile* MyVFS::OpenFile(wxFileSystem& WXUNUSED(fs), const wxString& location) |
| | 56 | { |
| | 57 | wxFSFile *f; |
| | 58 | wxInputStream *str; |
| | 59 | static char buf[1024]; |
| | 60 | const wxWX2MBbuf loc = location.ToAscii(); |
| | 61 | |
| | 62 | sprintf(buf, "<html><body><h2><i>You're in Node <u>%s</u></i></h2><p>" |
| | 63 | "Where do you want to go?<br><blockquote>" |
| | 64 | "<a href=\"%s-1\">sub-1</a><br>" |
| | 65 | "<a href=\"%s-2\">sub-2</a><br>" |
| | 66 | "<a href=\"%s-3\">sub-3</a><br>" |
| | 67 | "</blockquote></body></html>", |
| | 68 | (const char*)loc, (const char*)loc, (const char*)loc, |
| | 69 | (const char*)loc); |
| | 70 | |
| | 71 | // NB: There's a terrible hack involved: we fill 'buf' with new data every |
| | 72 | // time this method is called and return new wxMemoryInputStream pointing to it. |
| | 73 | // This won't work as soon as there are 2+ myVFS files opened. Fortunately, |
| | 74 | // this won't happen because wxHTML keeps only one "page" file opened at the |
| | 75 | // time. |
| | 76 | str = new wxMemoryInputStream(buf, strlen(buf)); |
| | 77 | f = new wxFSFile(str, location, wxT("text/html"), wxEmptyString, wxDateTime::Today()); |
| | 78 | |
| | 79 | return f; |
| | 80 | } |
| | 81 | |
| | 82 | |
| | 83 | |
| | 84 | // ---------------------------------------------------------------------------- |
| | 85 | // private classes |
| | 86 | // ---------------------------------------------------------------------------- |
| | 87 | |
| | 88 | // Define a new application type, each program should derive a class from wxApp |
| | 89 | class MyApp : public wxApp |
| | 90 | { |
| | 91 | public: |
| | 92 | // override base class virtuals |
| | 93 | // ---------------------------- |
| | 94 | |
| | 95 | // this one is called on application startup and is a good place for the app |
| | 96 | // initialization (doing it here and not in the ctor allows to have an error |
| | 97 | // return: if OnInit() returns false, the application terminates) |
| | 98 | virtual bool OnInit(); |
| | 99 | }; |
| | 100 | |
| | 101 | // Define a new frame type: this is going to be our main frame |
| | 102 | class MyFrame : public wxFrame |
| | 103 | { |
| | 104 | public: |
| | 105 | // ctor(s) |
| | 106 | MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size); |
| | 107 | |
| | 108 | // event handlers (these functions should _not_ be virtual) |
| | 109 | void OnQuit(wxCommandEvent& event); |
| | 110 | void OnBack(wxCommandEvent& event); |
| | 111 | void OnForward(wxCommandEvent& event); |
| | 112 | |
| | 113 | private: |
| | 114 | // any class wishing to process wxWidgets events must use this macro |
| | 115 | DECLARE_EVENT_TABLE() |
| | 116 | }; |
| | 117 | |
| | 118 | // ---------------------------------------------------------------------------- |
| | 119 | // constants |
| | 120 | // ---------------------------------------------------------------------------- |
| | 121 | |
| | 122 | // IDs for the controls and the menu commands |
| | 123 | enum |
| | 124 | { |
| | 125 | // menu items |
| | 126 | Minimal_Quit = 1, |
| | 127 | Minimal_Back, |
| | 128 | Minimal_Forward, |
| | 129 | |
| | 130 | // controls start here (the numbers are, of course, arbitrary) |
| | 131 | Minimal_Text = 1000 |
| | 132 | }; |
| | 133 | |
| | 134 | // ---------------------------------------------------------------------------- |
| | 135 | // event tables and other macros for wxWidgets |
| | 136 | // ---------------------------------------------------------------------------- |
| | 137 | |
| | 138 | // the event tables connect the wxWidgets events with the functions (event |
| | 139 | // handlers) which process them. It can be also done at run-time, but for the |
| | 140 | // simple menu events like this the static method is much simpler. |
| | 141 | BEGIN_EVENT_TABLE(MyFrame, wxFrame) |
| | 142 | EVT_MENU(Minimal_Quit, MyFrame::OnQuit) |
| | 143 | EVT_MENU(Minimal_Back, MyFrame::OnBack) |
| | 144 | EVT_MENU(Minimal_Forward, MyFrame::OnForward) |
| | 145 | END_EVENT_TABLE() |
| | 146 | |
| | 147 | // Create a new application object: this macro will allow wxWidgets to create |
| | 148 | // the application object during program execution (it's better than using a |
| | 149 | // static object for many reasons) and also declares the accessor function |
| | 150 | // wxGetApp() which will return the reference of the right type (i.e. MyApp and |
| | 151 | // not wxApp) |
| | 152 | IMPLEMENT_APP(MyApp) |
| | 153 | |
| | 154 | // ============================================================================ |
| | 155 | // implementation |
| | 156 | // ============================================================================ |
| | 157 | |
| | 158 | // ---------------------------------------------------------------------------- |
| | 159 | // the application class |
| | 160 | // ---------------------------------------------------------------------------- |
| | 161 | |
| | 162 | // `Main program' equivalent: the program execution "starts" here |
| | 163 | bool MyApp::OnInit() |
| | 164 | { |
| | 165 | if ( !wxApp::OnInit() ) |
| | 166 | return false; |
| | 167 | |
| | 168 | // Create the main application window |
| | 169 | MyFrame *frame = new MyFrame(_("wxHtmlWindow testing application"), |
| | 170 | wxDefaultPosition, wxSize(640, 480)); |
| | 171 | |
| | 172 | // Show it |
| | 173 | frame->Show(true); |
| | 174 | |
| | 175 | wxFileSystem::AddHandler(new MyVFS); |
| | 176 | |
| | 177 | // success: wxApp::OnRun() will be called which will enter the main message |
| | 178 | // loop and the application will run. If we returned false here, the |
| | 179 | // application would exit immediately. |
| | 180 | return true; |
| | 181 | } |
| | 182 | |
| | 183 | // ---------------------------------------------------------------------------- |
| | 184 | // main frame |
| | 185 | // ---------------------------------------------------------------------------- |
| | 186 | |
| | 187 | wxHtmlWindow *html; |
| | 188 | |
| | 189 | // frame constructor |
| | 190 | MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size) |
| | 191 | : wxFrame((wxFrame *)NULL, wxID_ANY, title, pos, size) |
| | 192 | { |
| | 193 | SetIcon(wxICON(sample)); |
| | 194 | |
| | 195 | // create a menu bar |
| | 196 | wxMenu *menuFile = new wxMenu; |
| | 197 | wxMenu *menuNav = new wxMenu; |
| | 198 | |
| | 199 | menuFile->Append(Minimal_Quit, _("E&xit")); |
| | 200 | menuNav->Append(Minimal_Back, _("Go &BACK")); |
| | 201 | menuNav->Append(Minimal_Forward, _("Go &FORWARD")); |
| | 202 | |
| | 203 | // now append the freshly created menu to the menu bar... |
| | 204 | wxMenuBar *menuBar = new wxMenuBar; |
| | 205 | menuBar->Append(menuFile, _("&File")); |
| | 206 | menuBar->Append(menuNav, _("&Navigate")); |
| | 207 | |
| | 208 | // ... and attach this menu bar to the frame |
| | 209 | SetMenuBar(menuBar); |
| | 210 | |
| | 211 | #if wxUSE_STATUSBAR |
| | 212 | CreateStatusBar(2); |
| | 213 | #endif // wxUSE_STATUSBAR |
| | 214 | |
| | 215 | html = new wxHtmlWindow(this); |
| | 216 | html -> SetRelatedFrame(this, _("VFS Demo: '%s'")); |
| | 217 | #if wxUSE_STATUSBAR |
| | 218 | html -> SetRelatedStatusBar(1); |
| | 219 | #endif // wxUSE_STATUSBAR |
| | 220 | html -> LoadPage(wxT("start.htm")); |
| | 221 | } |
| | 222 | |
| | 223 | |
| | 224 | // event handlers |
| | 225 | |
| | 226 | void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event)) |
| | 227 | { |
| | 228 | // true is to force the frame to close |
| | 229 | Close(true); |
| | 230 | } |
| | 231 | |
| | 232 | void MyFrame::OnBack(wxCommandEvent& WXUNUSED(event)) |
| | 233 | { |
| | 234 | if (!html -> HistoryBack()) wxMessageBox(_("You reached prehistory era!")); |
| | 235 | } |
| | 236 | |
| | 237 | void MyFrame::OnForward(wxCommandEvent& WXUNUSED(event)) |
| | 238 | { |
| | 239 | if (!html -> HistoryForward()) wxMessageBox(_("No more items in history!")); |
| | 240 | } |
projects / wxWidgets.git / blame_incremental