// Created: 04/01/98
// RCS-ID: $Id$
// Copyright: (c) Julian Smart and Markus Holzem
-// Licence: wxWindows license
+// Licence: wxWindows license
/////////////////////////////////////////////////////////////////////////////
+// ============================================================================
+// declarations
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
#ifdef __GNUG__
-#pragma implementation "minimal.cpp"
-#pragma interface "minimal.cpp"
+ #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
+ #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"
+ #include "wx/wx.h"
#endif
+// ----------------------------------------------------------------------------
+// ressources
+// ----------------------------------------------------------------------------
+// the application icon
#ifdef __WXGTK__
-#include "mondrian.xpm"
+ #include "mondrian.xpm"
#endif
-// Define a new application type
-class MyApp: public wxApp
-{ public:
- bool OnInit(void);
+// ----------------------------------------------------------------------------
+// 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
-class MyFrame: public wxFrame
-{ public:
- MyFrame(wxFrame *parent, const wxString& title,
- const wxPoint& pos, const wxSize& size);
-
- public:
+// 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);
- bool OnClose(void) { return TRUE; }
- DECLARE_EVENT_TABLE()
-
+private:
+ // any class wishing to process wxWindows events must use this macro
+ DECLARE_EVENT_TABLE()
};
-// ID for the menu commands
-#define MINIMAL_QUIT 1
-#define MINIMAL_TEXT 101
-#define MINIMAL_ABOUT 102
+// ----------------------------------------------------------------------------
+// constants
+// ----------------------------------------------------------------------------
+// IDs for the controls and the menu commands
+enum
+{
+ // menu items
+ Minimal_Quit = 1,
+ Minimal_About,
+
+ // 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_Quit, MyFrame::OnQuit)
+ EVT_MENU(Minimal_About, MyFrame::OnAbout)
END_EVENT_TABLE()
-// Create a new application object
-IMPLEMENT_APP (MyApp)
+// 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
+// ============================================================================
-// `Main program' equivalent
-bool MyApp::OnInit(void)
+// ----------------------------------------------------------------------------
+// the application class
+// ----------------------------------------------------------------------------
+
+// `Main program' equivalent: the program execution "starts" here
+bool MyApp::OnInit()
+{
+ // Create the main application window
+ MyFrame *frame = new MyFrame("Minimal wxWindows App",
+ wxPoint(50, 50), wxSize(450, 340));
+
+ // 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);
+
+ // 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
+// ----------------------------------------------------------------------------
+
+// frame constructor
+MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
+ : wxFrame((wxFrame *)NULL, -1, title, pos, size)
{
- // Create the main frame window
- MyFrame *frame = new MyFrame((wxFrame *) NULL, "Minimal wxWindows App",
- wxPoint(50, 50), wxSize(450, 340));
+ // set the frame icon
+ SetIcon(wxICON(mondrian));
- // Give it an icon
- frame->SetIcon(wxICON(mondrian));
+ // create a menu bar
+ wxMenu *menuFile = new wxMenu;
- // Make a menubar
- wxMenu *file_menu = new wxMenu;
+ menuFile->Append(Minimal_About, "&About...");
+ menuFile->AppendSeparator();
+ menuFile->Append(Minimal_Quit, "E&xit");
- 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);
+ // now append the freshly created menu to the menu bar...
+ wxMenuBar *menuBar = new wxMenuBar;
+ menuBar->Append(menuFile, "&File");
- // Make a panel with a message
- wxPanel *panel = new wxPanel(frame, -1, wxPoint(0, 0), wxSize(400, 200), wxTAB_TRAVERSAL);
+ // ... and attach this menu bar to the frame
+ SetMenuBar(menuBar);
- (void)new wxStaticText(panel, 311, "Hello!", wxPoint(10, 10), wxSize(-1, -1), 0);
+ // create a status bar just for fun (by default with 1 pane only)
+ CreateStatusBar();
+ SetStatusText("Welcome to wxWindows!");
- // Show the frame
- frame->Show(TRUE);
-
- SetTopWindow(frame);
+ // now create some controls
- return TRUE;
+ // a panel first - if there were several controls, it would allow us to
+ // navigate between them from the keyboard
+ wxPanel *panel = new wxPanel(this, -1, wxPoint(0, 0), wxSize(400, 200));
+
+ // and a static control whose parent is the panel
+ (void)new wxStaticText(panel, -1, "Hello, world!", wxPoint(10, 10));
}
-// My frame constructor
-MyFrame::MyFrame(wxFrame *parent, const wxString& title,
- const wxPoint& pos, const wxSize& size):
- wxFrame(parent, -1, title, pos, size)
-{}
-void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event) )
+// event handlers
+
+void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
{
- Close(TRUE);
+ // TRUE is to force the frame to close
+ Close(TRUE);
}
-void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event) )
+void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
{
- wxMessageDialog dialog(this, "This is a minimal sample\nA second line in the message box",
- "About Minimal", wxYES_NO|wxCANCEL);
-
- dialog.ShowModal();
+ wxMessageBox("This is a minimal sample\nA second line in the message box",
+ "About Minimal", wxOK | wxICON_INFORMATION, this);
}
-
-
projects / wxWidgets.git / commitdiff
