fixed NULL problem

[wxWidgets.git] / samples / dynamic / minimal.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        minimal.cpp
// Purpose:     Dynamic events wxWindows sample
// Author:      Julian Smart
// Modified by:
// Created:     04/01/98
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart and Markus Holzem
// Licence:   	wxWindows license
/////////////////////////////////////////////////////////////////////////////

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

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

#ifdef __BORLANDC__
#pragma hdrstop
#endif

#ifndef WX_PRECOMP
#include "wx/wx.h"
#endif

// Define a new application type
class MyApp: public wxApp
{ public:
    bool OnInit(void);
};

// Define a new frame type
class MyFrame: public wxFrame
{ public:
    MyFrame(wxFrame *frame, char *title, int x, int y, int w, int h);
    
 public:
    void OnQuit(wxCommandEvent& event);
    void OnAbout(wxCommandEvent& event);
	bool OnClose(void) { return TRUE; }
};

// ID for the menu commands
#define MINIMAL_QUIT 	1
#define MINIMAL_TEXT 	101
#define MINIMAL_ABOUT 	102

// Create a new application object
IMPLEMENT_APP	(MyApp)

// `Main program' equivalent, creating windows and returning main app frame
bool MyApp::OnInit(void)
{
  // Create the main frame window
  MyFrame *frame = new MyFrame(NULL, "Minimal wxWindows App", 50, 50, 450, 340);
  
  frame->Connect( MINIMAL_QUIT,  -1, wxEVT_COMMAND_MENU_SELECTED, (wxObjectEventFunction)MyFrame::OnQuit );
  frame->Connect( MINIMAL_ABOUT, -1, wxEVT_COMMAND_MENU_SELECTED, (wxObjectEventFunction)MyFrame::OnAbout );
  
  // Give it an icon
#ifdef __WINDOWS__
  frame->SetIcon(wxIcon("mondrian"));
#endif
#ifdef __X__
  frame->SetIcon(wxIcon("aiai.xbm"));
#endif

  // Make a menubar
  wxMenu *file_menu = new wxMenu;

  file_menu->Append(MINIMAL_ABOUT, "&About");
  file_menu->Append(MINIMAL_QUIT, "E&xit");
  wxMenuBar *menu_bar = new wxMenuBar;
  menu_bar->Append(file_menu, "&File");
  frame->SetMenuBar(menu_bar);

  // Make a panel with a message
  wxPanel *panel = new wxPanel(frame, -1, wxPoint(0, 0), wxSize(400, 200), wxTAB_TRAVERSAL);

  wxStaticText *msg = new wxStaticText(panel, 311, "Hello!", wxPoint(10, 10), wxSize(-1, -1),
    0);

  // Show the frame
  frame->Show(TRUE);
  
  SetTopWindow(frame);

  return TRUE;
}

// My frame constructor
MyFrame::MyFrame(wxFrame *frame, char *title, int x, int y, int w, int h):
  wxFrame(frame, -1, title, wxPoint(x, y), wxSize(w, h))
{}

void MyFrame::OnQuit(wxCommandEvent& event)
{
  Close(TRUE);
}

void MyFrame::OnAbout(wxCommandEvent& event)
{
  wxMessageDialog dialog(this, "This is a minimal sample\nA second line in the message box",
  	"About Minimal", wxYES_NO|wxCANCEL);

  dialog.ShowModal();
}