VZ: I have reformatted it to correspond to our style conventions (tab stop =
4, no hard tabs, no function(void), ...) and added a couple of comments to make it (hopefully!) more understandable. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@744 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
parent
054889057e
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9fdf3c3877
@ -6,112 +6,185 @@
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// Created: 04/01/98
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// RCS-ID: $Id$
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// Copyright: (c) Julian Smart and Markus Holzem
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// Licence: wxWindows license
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// Licence: wxWindows license
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/////////////////////////////////////////////////////////////////////////////
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// ============================================================================
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// declarations
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// ============================================================================
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// ----------------------------------------------------------------------------
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// headers
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// ----------------------------------------------------------------------------
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#ifdef __GNUG__
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#pragma implementation "minimal.cpp"
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#pragma interface "minimal.cpp"
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#pragma implementation "minimal.cpp"
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#pragma interface "minimal.cpp"
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#endif
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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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#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" wxWindows headers
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#ifndef WX_PRECOMP
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#include "wx/wx.h"
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#include "wx/wx.h"
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#endif
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// ----------------------------------------------------------------------------
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// ressources
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// ----------------------------------------------------------------------------
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// the application icon
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#ifdef __WXGTK__
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#include "mondrian.xpm"
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#include "mondrian.xpm"
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#endif
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// Define a new application type
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class MyApp: public wxApp
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{ public:
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bool OnInit(void);
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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
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class MyFrame: public wxFrame
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{ public:
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MyFrame(wxFrame *parent, const wxString& title,
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const wxPoint& pos, const wxSize& size);
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public:
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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 OnAbout(wxCommandEvent& event);
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bool OnClose(void) { return TRUE; }
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DECLARE_EVENT_TABLE()
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private:
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// any class wishing to process wxWindows events must use this macro
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DECLARE_EVENT_TABLE()
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};
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// ID for the menu commands
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#define MINIMAL_QUIT 1
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#define MINIMAL_TEXT 101
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#define MINIMAL_ABOUT 102
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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_About,
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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 wxWindows
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// ----------------------------------------------------------------------------
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// the event tables connect the wxWindows 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_ABOUT, MyFrame::OnAbout)
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EVT_MENU(Minimal_Quit, MyFrame::OnQuit)
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EVT_MENU(Minimal_About, MyFrame::OnAbout)
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END_EVENT_TABLE()
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// Create a new application object
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IMPLEMENT_APP (MyApp)
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// Create a new application object: this macro will allow wxWindows 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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// `Main program' equivalent
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bool MyApp::OnInit(void)
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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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// Create the main frame window
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MyFrame *frame = new MyFrame((wxFrame *) NULL, "Minimal wxWindows App",
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wxPoint(50, 50), wxSize(450, 340));
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// Create the main application window
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MyFrame *frame = new MyFrame("Minimal wxWindows App",
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wxPoint(50, 50), wxSize(450, 340));
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// Give it an icon
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frame->SetIcon(wxICON(mondrian));
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// Show it and tell the application that it's our main window
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// @@@ what does it do exactly, in fact? is it necessary here?
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frame->Show(TRUE);
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SetTopWindow(frame);
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// Make a menubar
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wxMenu *file_menu = new wxMenu;
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file_menu->Append(MINIMAL_ABOUT, "&About");
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file_menu->Append(MINIMAL_QUIT, "E&xit");
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wxMenuBar *menu_bar = new wxMenuBar;
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menu_bar->Append(file_menu, "&File");
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frame->SetMenuBar(menu_bar);
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// Make a panel with a message
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wxPanel *panel = new wxPanel(frame, -1, wxPoint(0, 0), wxSize(400, 200), wxTAB_TRAVERSAL);
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(void)new wxStaticText(panel, 311, "Hello!", wxPoint(10, 10), wxSize(-1, -1), 0);
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// Show the frame
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frame->Show(TRUE);
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SetTopWindow(frame);
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return TRUE;
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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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// My frame constructor
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MyFrame::MyFrame(wxFrame *parent, const wxString& title,
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const wxPoint& pos, const wxSize& size):
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wxFrame(parent, -1, title, pos, size)
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{}
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// ----------------------------------------------------------------------------
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// main frame
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// ----------------------------------------------------------------------------
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void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event) )
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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, -1, title, pos, size)
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{
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Close(TRUE);
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}
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// set the frame icon
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SetIcon(wxICON(mondrian));
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void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event) )
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{
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wxMessageDialog dialog(this, "This is a minimal sample\nA second line in the message box",
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"About Minimal", wxYES_NO|wxCANCEL);
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// create a menu bar
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wxMenu *menuFile = new wxMenu;
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dialog.ShowModal();
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menuFile->Append(Minimal_About, "&About...");
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menuFile->AppendSeparator();
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menuFile->Append(Minimal_Quit, "E&xit");
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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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// ... and attach this menu bar to the frame
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SetMenuBar(menuBar);
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// create a status bar just for fun (by default with 1 pane only)
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CreateStatusBar();
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SetStatusText("Welcome to wxWindows!");
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// now create some controls
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// a panel first - if there were several controls, it would allow us to
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// navigate between them from the keyboard
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wxPanel *panel = new wxPanel(this, -1, wxPoint(0, 0), wxSize(400, 200));
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// and a static control whose parent is the panel
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(void)new wxStaticText(panel, -1, "Hello, world!", wxPoint(10, 10));
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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::OnAbout(wxCommandEvent& WXUNUSED(event))
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{
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wxMessageBox("This is a minimal sample\nA second line in the message box",
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"About Minimal", wxOK | wxICON_INFORMATION, this);
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}
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