[wxWidgets.git] / samples / html / virtual / virtual.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        virtua;.cpp
// Purpose:     wxHtml testing example
//              demonstrates virtual file systems feature
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
    #pragma implementation "test.cpp"
    #pragma interface "test.cpp"
#endif

// For compilers that support precompilation, includes "wx/wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

// for all others, include the necessary headers (this file is usually all you
// need because it includes almost all "standard" wxWindows headers
#ifndef WX_PRECOMP
    #include "wx/wx.h"
#endif


#include "wx/html/htmlwin.h"


// new handler class:

#include "wx/wfstream.h"
#include "wx/mstream.h"


class MyVFS : public wxFileSystemHandler
{
public:
    MyVFS() : wxFileSystemHandler() {}

    wxFSFile* OpenFile(wxFileSystem& fs, const wxString& location);
    bool CanOpen(const wxString& location);
};


bool MyVFS::CanOpen(const wxString& location)
{
    return (GetProtocol(location) == "myVFS");
}


wxFSFile* MyVFS::OpenFile(wxFileSystem& fs, const wxString& location)
{
    wxFSFile *f;
    wxInputStream *str;
    char *buf = (char*)malloc(1024);

    sprintf(buf, "<html><body><h2><i>You're in Node <u>%s</u></i></h2><p>"
                 "Where do you want to go?<br><blockquote>"
                 "<a href=\"%s-1\">sub-1</a><br>"
                 "<a href=\"%s-2\">sub-2</a><br>"
                 "<a href=\"%s-3\">sub-3</a><br>"
                 "</blockquote></body></html>",
                 location.GetData(), location.GetData(), location.GetData(), location.GetData());

    // WARNING: wxMemoryInputStream will not free buf.
    // There is a memory leak here.
    str = new wxMemoryInputStream(buf, strlen(buf));
    f = new wxFSFile(str, location, "text/html", wxEmptyString, wxDateTime::Today());
    return f;
}


// ----------------------------------------------------------------------------
// private classes
// ----------------------------------------------------------------------------

// Define a new application type, each program should derive a class from wxApp
   class MyApp : public wxApp
   {
   public:
    // override base class virtuals
    // ----------------------------
   
    // this one is called on application startup and is a good place for the app
    // initialization (doing it here and not in the ctor allows to have an error
    // return: if OnInit() returns false, the application terminates)
      virtual bool OnInit();
   };

// Define a new frame type: this is going to be our main frame
   class MyFrame : public wxFrame
   {
   public:
    // ctor(s)
      MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
   
    // event handlers (these functions should _not_ be virtual)
      void OnQuit(wxCommandEvent& event);
      void OnAbout(wxCommandEvent& event);
      void OnBack(wxCommandEvent& event);
      void OnForward(wxCommandEvent& event);

   private:
    // any class wishing to process wxWindows events must use this macro
    DECLARE_EVENT_TABLE()
   };

// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------

// IDs for the controls and the menu commands
   enum
   {
    // menu items
   Minimal_Quit = 1,
   Minimal_About,
   Minimal_Back,
   Minimal_Forward,
   
    // controls start here (the numbers are, of course, arbitrary)
   Minimal_Text = 1000,
   };

// ----------------------------------------------------------------------------
// event tables and other macros for wxWindows
// ----------------------------------------------------------------------------

// the event tables connect the wxWindows events with the functions (event
// handlers) which process them. It can be also done at run-time, but for the
// simple menu events like this the static method is much simpler.
   BEGIN_EVENT_TABLE(MyFrame, wxFrame)
   EVT_MENU(Minimal_Quit,  MyFrame::OnQuit)
   EVT_MENU(Minimal_About, MyFrame::OnAbout)
   EVT_MENU(Minimal_Back, MyFrame::OnBack)
   EVT_MENU(Minimal_Forward, MyFrame::OnForward)
   END_EVENT_TABLE()
   
   // Create a new application object: this macro will allow wxWindows to create
   // the application object during program execution (it's better than using a
   // static object for many reasons) and also declares the accessor function
   // wxGetApp() which will return the reference of the right type (i.e. MyApp and
   // not wxApp)
   IMPLEMENT_APP(MyApp)
   
   // ============================================================================
   // implementation
   // ============================================================================
   
   // ----------------------------------------------------------------------------
   // the application class
   // ----------------------------------------------------------------------------
   
   // `Main program' equivalent: the program execution "starts" here
   bool MyApp::OnInit()
   {
    // Create the main application window
      MyFrame *frame = new MyFrame("wxHtmlWindow testing application",
         wxPoint(50, 50), wxSize(640, 480));
   
    // Show it and tell the application that it's our main window
    // @@@ what does it do exactly, in fact? is it necessary here?
      frame->Show(TRUE);
      SetTopWindow(frame);
      wxFileSystem::AddHandler(new MyVFS);
   
    // success: wxApp::OnRun() will be called which will enter the main message
    // loop and the application will run. If we returned FALSE here, the
    // application would exit immediately.
      return TRUE;
   }

// ----------------------------------------------------------------------------
// main frame
// ----------------------------------------------------------------------------

wxHtmlWindow *html;

// frame constructor
   MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
   : wxFrame((wxFrame *)NULL, -1, title, pos, size)
   {
    // create a menu bar
      wxMenu *menuFile = new wxMenu;
      wxMenu *menuNav = new wxMenu;

      menuFile->Append(Minimal_Quit, "E&xit");
      menuNav->Append(Minimal_Back, "Go &BACK");
      menuNav->Append(Minimal_Forward, "Go &FORWARD");

    // now append the freshly created menu to the menu bar...
      wxMenuBar *menuBar = new wxMenuBar;
      menuBar->Append(menuFile, "&File");
      menuBar->Append(menuNav, "&Navigate");

    // ... and attach this menu bar to the frame
      SetMenuBar(menuBar);
   
      CreateStatusBar(2);

      html = new wxHtmlWindow(this);
      html -> SetRelatedFrame(this, "VFS Demo: '%s'");
      html -> SetRelatedStatusBar(1);
      html -> LoadPage("start.htm");
   }


// event handlers

   void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
   {
    // TRUE is to force the frame to close
      Close(TRUE);
   }

   void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
   {
   }


   void MyFrame::OnBack(wxCommandEvent& WXUNUSED(event))
   {
   if (!html -> HistoryBack()) wxMessageBox("You reached prehistory era!");
   }


   void MyFrame::OnForward(wxCommandEvent& WXUNUSED(event))
   {
   if (!html -> HistoryForward()) wxMessageBox("No more items in history!");
   }
Commit	Line	Data
5526e819 VS	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: virtua;.cpp
	3	// Purpose: wxHtml testing example
	4	// demonstrates virtual file systems feature
	5	/////////////////////////////////////////////////////////////////////////////
	6
	7	#ifdef __GNUG__
	8	#pragma implementation "test.cpp"
	9	#pragma interface "test.cpp"
	10	#endif
	11
	12	// For compilers that support precompilation, includes "wx/wx.h".
92a19c2e	13	#include "wx/wxprec.h"
5526e819 VS	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" wxWindows headers
	21	#ifndef WX_PRECOMP
67547666	22	#include "wx/wx.h"
5526e819 VS	23	#endif
	24
	25
67547666	26	#include "wx/html/htmlwin.h"
5526e819 VS	27
	28
	29	// new handler class:
	30
67547666 GD	31	#include "wx/wfstream.h"
67547666 GD	32	#include "wx/mstream.h"
5526e819 VS	33
	34
	35
	36	class MyVFS : public wxFileSystemHandler
	37	{
	38	public:
	39	MyVFS() : wxFileSystemHandler() {}
	40
	41	wxFSFile* OpenFile(wxFileSystem& fs, const wxString& location);
	42	bool CanOpen(const wxString& location);
	43	};
	44
	45
	46	bool MyVFS::CanOpen(const wxString& location)
	47	{
	48	return (GetProtocol(location) == "myVFS");
	49	}
	50
	51
	52
	53	wxFSFile* MyVFS::OpenFile(wxFileSystem& fs, const wxString& location)
	54	{
	55	wxFSFile *f;
	56	wxInputStream *str;
	57	char buf = (char)malloc(1024);
	58
	59	sprintf(buf, "<html><body><h2><i>You're in Node <u>%s</u></i></h2><p>"
	60	"Where do you want to go?<br><blockquote>"
	61	"<a href=\"%s-1\">sub-1</a><br>"
	62	"<a href=\"%s-2\">sub-2</a><br>"
	63	"<a href=\"%s-3\">sub-3</a><br>"
	64	"</blockquote></body></html>",
	65	location.GetData(), location.GetData(), location.GetData(), location.GetData());
7e1e0960 GL	66
	67	// WARNING: wxMemoryInputStream will not free buf.
	68	// There is a memory leak here.
5526e819	69	str = new wxMemoryInputStream(buf, strlen(buf));
3592c01e	70	f = new wxFSFile(str, location, "text/html", wxEmptyString, wxDateTime::Today());
5526e819 VS	71	return f;
	72	}
	73
	74
	75
	76	// ----------------------------------------------------------------------------
	77	// private classes
	78	// ----------------------------------------------------------------------------
	79
	80	// Define a new application type, each program should derive a class from wxApp
	81	class MyApp : public wxApp
	82	{
	83	public:
	84	// override base class virtuals
	85	// ----------------------------
	86
	87	// this one is called on application startup and is a good place for the app
	88	// initialization (doing it here and not in the ctor allows to have an error
	89	// return: if OnInit() returns false, the application terminates)
	90	virtual bool OnInit();
	91	};
	92
	93	// Define a new frame type: this is going to be our main frame
	94	class MyFrame : public wxFrame
	95	{
	96	public:
	97	// ctor(s)
	98	MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
	99
	100	// event handlers (these functions should _not_ be virtual)
	101	void OnQuit(wxCommandEvent& event);
	102	void OnAbout(wxCommandEvent& event);
	103	void OnBack(wxCommandEvent& event);
	104	void OnForward(wxCommandEvent& event);
	105
	106	private:
	107	// any class wishing to process wxWindows events must use this macro
	108	DECLARE_EVENT_TABLE()
	109	};
	110
	111	// ----------------------------------------------------------------------------
	112	// constants
	113	// ----------------------------------------------------------------------------
	114
	115	// IDs for the controls and the menu commands
	116	enum
	117	{
	118	// menu items
	119	Minimal_Quit = 1,
	120	Minimal_About,
	121	Minimal_Back,
	122	Minimal_Forward,
	123
	124	// controls start here (the numbers are, of course, arbitrary)
	125	Minimal_Text = 1000,
	126	};
	127
	128	// ----------------------------------------------------------------------------
	129	// event tables and other macros for wxWindows
	130	// ----------------------------------------------------------------------------
	131
	132	// the event tables connect the wxWindows events with the functions (event
	133	// handlers) which process them. It can be also done at run-time, but for the
	134	// simple menu events like this the static method is much simpler.
135	BEGIN_EVENT_TABLE(MyFrame, wxFrame)
136	EVT_MENU(Minimal_Quit, MyFrame::OnQuit)
137	EVT_MENU(Minimal_About, MyFrame::OnAbout)
138	EVT_MENU(Minimal_Back, MyFrame::OnBack)
139	EVT_MENU(Minimal_Forward, MyFrame::OnForward)
140	END_EVENT_TABLE()
141
142	// Create a new application object: this macro will allow wxWindows to create
143	// the application object during program execution (it's better than using a
144	// static object for many reasons) and also declares the accessor function
145	// wxGetApp() which will return the reference of the right type (i.e. MyApp and
146	// not wxApp)
147	IMPLEMENT_APP(MyApp)
148
149	// ============================================================================
150	// implementation
151	// ============================================================================
152
153	// ----------------------------------------------------------------------------
154	// the application class
155	// ----------------------------------------------------------------------------
156
157	// `Main program' equivalent: the program execution "starts" here
158	bool MyApp::OnInit()
159	{
160	// Create the main application window
161	MyFrame *frame = new MyFrame("wxHtmlWindow testing application",
162	wxPoint(50, 50), wxSize(640, 480));
163
164	// Show it and tell the application that it's our main window
165	// @@@ what does it do exactly, in fact? is it necessary here?
166	frame->Show(TRUE);
167	SetTopWindow(frame);
168	wxFileSystem::AddHandler(new MyVFS);
169
170	// success: wxApp::OnRun() will be called which will enter the main message
171	// loop and the application will run. If we returned FALSE here, the
172	// application would exit immediately.
173	return TRUE;
174	}
175
176	// ----------------------------------------------------------------------------
177	// main frame
178	// ----------------------------------------------------------------------------
179
180	wxHtmlWindow *html;
181
182	// frame constructor
183	MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
184	: wxFrame((wxFrame *)NULL, -1, title, pos, size)
185	{
186	// create a menu bar
187	wxMenu *menuFile = new wxMenu;
188	wxMenu *menuNav = new wxMenu;
189
190	menuFile->Append(Minimal_Quit, "E&xit");
191	menuNav->Append(Minimal_Back, "Go &BACK");
192	menuNav->Append(Minimal_Forward, "Go &FORWARD");
193
194	// now append the freshly created menu to the menu bar...
195	wxMenuBar *menuBar = new wxMenuBar;
196	menuBar->Append(menuFile, "&File");
197	menuBar->Append(menuNav, "&Navigate");
198
199	// ... and attach this menu bar to the frame
200	SetMenuBar(menuBar);
201
9eeb92ac	202	CreateStatusBar(2);
5526e819 VS	203
	204	html = new wxHtmlWindow(this);
	205	html -> SetRelatedFrame(this, "VFS Demo: '%s'");
	206	html -> SetRelatedStatusBar(1);
	207	html -> LoadPage("start.htm");
	208	}
	209
	210
	211	// event handlers
	212
	213	void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
	214	{
	215	// TRUE is to force the frame to close
	216	Close(TRUE);
	217	}
	218
	219	void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
	220	{
	221	}
	222
	223
	224
	225	void MyFrame::OnBack(wxCommandEvent& WXUNUSED(event))
	226	{
	227	if (!html -> HistoryBack()) wxMessageBox("You reached prehistory era!");
	228	}
	229
	230
	231	void MyFrame::OnForward(wxCommandEvent& WXUNUSED(event))
	232	{
	233	if (!html -> HistoryForward()) wxMessageBox("No more items in history!");
	234	}