e709239889
Add a special symbol which is defined only if the icons and other images (e.g. cursor) are in the separate resource files and don't need to be embedded as XPMs in the main program. This makes the checks more clear and more customizable as it's enough to change wxHAS_IMAGES_IN_RESOURCES definition instead of changing many platform checks. Closes #14050. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@70789 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
241 lines
7.4 KiB
C++
241 lines
7.4 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: virtual.cpp
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// Purpose: wxHtml sample: demonstrates virtual file systems feature
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// Author: ?
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// Modified by:
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// Created: ?
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// RCS-ID: $Id$
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// Copyright: (c) wxWidgets team
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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// For compilers that support precompilation, includes "wx/wx.h".
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#include "wx/wxprec.h"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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// for all others, include the necessary headers (this file is usually all you
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// need because it includes almost all "standard" wxWidgets headers
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#ifndef WX_PRECOMP
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#include "wx/wx.h"
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#endif
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#include "wx/html/htmlwin.h"
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#ifndef wxHAS_IMAGES_IN_RESOURCES
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#include "../../sample.xpm"
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#endif
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// new handler class:
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#include "wx/wfstream.h"
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#include "wx/mstream.h"
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// ----------------------------------------------------------------------------
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// MyVFS
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// ----------------------------------------------------------------------------
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class MyVFS : public wxFileSystemHandler
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{
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public:
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MyVFS() : wxFileSystemHandler() {}
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wxFSFile* OpenFile(wxFileSystem& fs, const wxString& location);
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bool CanOpen(const wxString& location);
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};
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bool MyVFS::CanOpen(const wxString& location)
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{
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return (GetProtocol(location) == wxT("myVFS"));
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}
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wxFSFile* MyVFS::OpenFile(wxFileSystem& WXUNUSED(fs), const wxString& location)
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{
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wxFSFile *f;
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wxInputStream *str;
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static char buf[1024];
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const wxWX2MBbuf loc = location.ToAscii();
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sprintf(buf, "<html><body><h2><i>You're in Node <u>%s</u></i></h2><p>"
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"Where do you want to go?<br><blockquote>"
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"<a href=\"%s-1\">sub-1</a><br>"
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"<a href=\"%s-2\">sub-2</a><br>"
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"<a href=\"%s-3\">sub-3</a><br>"
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"</blockquote></body></html>",
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(const char*)loc, (const char*)loc, (const char*)loc,
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(const char*)loc);
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// NB: There's a terrible hack involved: we fill 'buf' with new data every
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// time this method is called and return new wxMemoryInputStream pointing to it.
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// This won't work as soon as there are 2+ myVFS files opened. Fortunately,
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// this won't happen because wxHTML keeps only one "page" file opened at the
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// time.
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str = new wxMemoryInputStream(buf, strlen(buf));
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f = new wxFSFile(str, location, wxT("text/html"), wxEmptyString, wxDateTime::Today());
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return f;
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}
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// ----------------------------------------------------------------------------
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// private classes
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// ----------------------------------------------------------------------------
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// Define a new application type, each program should derive a class from wxApp
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class MyApp : public wxApp
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{
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public:
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// override base class virtuals
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// ----------------------------
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// this one is called on application startup and is a good place for the app
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// initialization (doing it here and not in the ctor allows to have an error
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// return: if OnInit() returns false, the application terminates)
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virtual bool OnInit();
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};
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// Define a new frame type: this is going to be our main frame
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class MyFrame : public wxFrame
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{
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public:
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// ctor(s)
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MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
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// event handlers (these functions should _not_ be virtual)
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void OnQuit(wxCommandEvent& event);
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void OnBack(wxCommandEvent& event);
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void OnForward(wxCommandEvent& event);
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private:
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// any class wishing to process wxWidgets events must use this macro
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DECLARE_EVENT_TABLE()
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};
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// ----------------------------------------------------------------------------
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// constants
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// ----------------------------------------------------------------------------
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// IDs for the controls and the menu commands
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enum
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{
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// menu items
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Minimal_Quit = 1,
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Minimal_Back,
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Minimal_Forward,
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// controls start here (the numbers are, of course, arbitrary)
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Minimal_Text = 1000
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};
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// ----------------------------------------------------------------------------
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// event tables and other macros for wxWidgets
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// ----------------------------------------------------------------------------
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// the event tables connect the wxWidgets events with the functions (event
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// handlers) which process them. It can be also done at run-time, but for the
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// simple menu events like this the static method is much simpler.
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BEGIN_EVENT_TABLE(MyFrame, wxFrame)
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EVT_MENU(Minimal_Quit, MyFrame::OnQuit)
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EVT_MENU(Minimal_Back, MyFrame::OnBack)
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EVT_MENU(Minimal_Forward, MyFrame::OnForward)
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END_EVENT_TABLE()
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// Create a new application object: this macro will allow wxWidgets to create
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// the application object during program execution (it's better than using a
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// static object for many reasons) and also declares the accessor function
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// wxGetApp() which will return the reference of the right type (i.e. MyApp and
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// not wxApp)
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IMPLEMENT_APP(MyApp)
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// ============================================================================
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// implementation
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// ============================================================================
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// ----------------------------------------------------------------------------
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// the application class
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// ----------------------------------------------------------------------------
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// `Main program' equivalent: the program execution "starts" here
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bool MyApp::OnInit()
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{
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if ( !wxApp::OnInit() )
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return false;
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// Create the main application window
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MyFrame *frame = new MyFrame(_("wxHtmlWindow testing application"),
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wxDefaultPosition, wxSize(640, 480));
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// Show it
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frame->Show(true);
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wxFileSystem::AddHandler(new MyVFS);
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// success: wxApp::OnRun() will be called which will enter the main message
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// loop and the application will run. If we returned false here, the
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// application would exit immediately.
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return true;
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}
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// ----------------------------------------------------------------------------
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// main frame
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// ----------------------------------------------------------------------------
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wxHtmlWindow *html;
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// frame constructor
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MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
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: wxFrame((wxFrame *)NULL, wxID_ANY, title, pos, size)
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{
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SetIcon(wxICON(sample));
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// create a menu bar
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wxMenu *menuFile = new wxMenu;
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wxMenu *menuNav = new wxMenu;
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menuFile->Append(Minimal_Quit, _("E&xit"));
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menuNav->Append(Minimal_Back, _("Go &BACK"));
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menuNav->Append(Minimal_Forward, _("Go &FORWARD"));
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// now append the freshly created menu to the menu bar...
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wxMenuBar *menuBar = new wxMenuBar;
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menuBar->Append(menuFile, _("&File"));
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menuBar->Append(menuNav, _("&Navigate"));
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// ... and attach this menu bar to the frame
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SetMenuBar(menuBar);
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#if wxUSE_STATUSBAR
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CreateStatusBar(2);
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#endif // wxUSE_STATUSBAR
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html = new wxHtmlWindow(this);
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html -> SetRelatedFrame(this, _("VFS Demo: '%s'"));
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#if wxUSE_STATUSBAR
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html -> SetRelatedStatusBar(1);
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#endif // wxUSE_STATUSBAR
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html -> LoadPage(wxT("start.htm"));
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}
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// event handlers
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void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
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{
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// true is to force the frame to close
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Close(true);
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}
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void MyFrame::OnBack(wxCommandEvent& WXUNUSED(event))
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{
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if (!html -> HistoryBack()) wxMessageBox(_("You reached prehistory era!"));
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}
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void MyFrame::OnForward(wxCommandEvent& WXUNUSED(event))
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{
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if (!html -> HistoryForward()) wxMessageBox(_("No more items in history!"));
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}
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