Support using GetTextExtent() with empty string to get descent in wxOSX.

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

diff --git a/samples/minimal/minimal.cpp b/samples/minimal/minimal.cpp
index 84a4ff0a090b918b98e71aa57deb491a238d08bc..a78e462908be84bf2a6acba019340414f7ff813c 100644 (file)
--- a/samples/minimal/minimal.cpp
+++ b/samples/minimal/minimal.cpp
@@ -1,6 +1,6 @@
 /////////////////////////////////////////////////////////////////////////////
 // Name:        minimal.cpp
 /////////////////////////////////////////////////////////////////////////////
 // Name:        minimal.cpp

-// Purpose:     Minimal wxWindows sample
+// Purpose:     Minimal wxWidgets sample

 // Author:      Julian Smart
 // Modified by:
 // Created:     04/01/98
 // Author:      Julian Smart
 // Modified by:
 // Created:     04/01/98


@@ -16,10 +16,6 @@
 // ----------------------------------------------------------------------------
 // headers
 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------
 // headers
 // ----------------------------------------------------------------------------

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

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


@@ -29,17 +25,19 @@
 #endif
 
 // for all others, include the necessary headers (this file is usually all you
 #endif
 
 // for all others, include the necessary headers (this file is usually all you

-// need because it includes almost all "standard" wxWindows headers
+// need because it includes almost all "standard" wxWidgets headers)

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

-// ressources
+// resources

 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------

-// the application icon
-#if defined(__WXGTK__) || defined(__WXMOTIF__)
-    #include "mondrian.xpm"
+
+// the application icon (under Windows and OS/2 it is in resources and even
+// though we could still include the XPM here it would be unused)
+#ifndef wxHAS_IMAGES_IN_RESOURCES
+    #include "../sample.xpm"

 #endif
 
 // ----------------------------------------------------------------------------
 #endif
 
 // ----------------------------------------------------------------------------


@@ -64,14 +62,14 @@ class MyFrame : public wxFrame
 {
 public:
     // ctor(s)
 {
 public:
     // ctor(s)

-    MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
+    MyFrame(const wxString& title);

 
     // event handlers (these functions should _not_ be virtual)
     void OnQuit(wxCommandEvent& event);
     void OnAbout(wxCommandEvent& event);
 
 private:
 
     // event handlers (these functions should _not_ be virtual)
     void OnQuit(wxCommandEvent& event);
     void OnAbout(wxCommandEvent& event);
 
 private:

-    // any class wishing to process wxWindows events must use this macro
+    // any class wishing to process wxWidgets events must use this macro

     DECLARE_EVENT_TABLE()
 };
 
     DECLARE_EVENT_TABLE()
 };
 


@@ -83,15 +81,19 @@ private:
 enum
 {
     // menu items
 enum
 {
     // menu items

-    Minimal_Quit = 1,
-    Minimal_About
+    Minimal_Quit = wxID_EXIT,
+
+    // it is important for the id corresponding to the "About" command to have
+    // this standard value as otherwise it won't be handled properly under Mac
+    // (where it is special and put into the "Apple" menu)
+    Minimal_About = wxID_ABOUT

 };
 
 // ----------------------------------------------------------------------------
 };
 
 // ----------------------------------------------------------------------------

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

 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------
 

-// the event tables connect the wxWindows events with the functions (event
+// the event tables connect the wxWidgets 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)
 // 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)


@@ -99,9 +101,9 @@ BEGIN_EVENT_TABLE(MyFrame, wxFrame)
     EVT_MENU(Minimal_About, MyFrame::OnAbout)
 END_EVENT_TABLE()
 
     EVT_MENU(Minimal_About, MyFrame::OnAbout)
 END_EVENT_TABLE()
 

-// Create a new application object: this macro will allow wxWindows to create
+// Create a new application object: this macro will allow wxWidgets to create

 // the application object during program execution (it's better than using a
 // the application object during program execution (it's better than using a

-// static object for many reasons) and also declares the accessor function
+// static object for many reasons) and also implements the accessor function

 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
 // not wxApp)
 IMPLEMENT_APP(MyApp)
 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
 // not wxApp)
 IMPLEMENT_APP(MyApp)


@@ -114,22 +116,25 @@ IMPLEMENT_APP(MyApp)
 // the application class
 // ----------------------------------------------------------------------------
 
 // the application class
 // ----------------------------------------------------------------------------
 

-// `Main program' equivalent: the program execution "starts" here
+// 'Main program' equivalent: the program execution "starts" here

 bool MyApp::OnInit()
 {
 bool MyApp::OnInit()
 {

-    // Create the main application window
-    MyFrame *frame = new MyFrame("Minimal wxWindows App",
-                                 wxPoint(50, 50), wxSize(450, 340));
+    // call the base class initialization method, currently it only parses a
+    // few common command-line options but it could be do more in the future
+    if ( !wxApp::OnInit() )
+        return false;

 
 

-    // 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);
+    // create the main application window
+    MyFrame *frame = new MyFrame("Minimal wxWidgets App");
+
+    // and show it (the frames, unlike simple controls, are not shown when
+    // created initially)
+    frame->Show(true);

 
     // success: wxApp::OnRun() will be called which will enter the main message
 
     // success: wxApp::OnRun() will be called which will enter the main message

-    // loop and the application will run. If we returned FALSE here, the
+    // loop and the application will run. If we returned false here, the

     // application would exit immediately.
     // application would exit immediately.

-    return TRUE;
+    return true;

 }
 
 // ----------------------------------------------------------------------------
 }
 
 // ----------------------------------------------------------------------------


@@ -137,44 +142,35 @@ bool MyApp::OnInit()
 // ----------------------------------------------------------------------------
 
 // frame constructor
 // ----------------------------------------------------------------------------
 
 // frame constructor

-MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
-       : wxFrame((wxFrame *)NULL, -1, title, pos, size)
+MyFrame::MyFrame(const wxString& title)
+       : wxFrame(NULL, wxID_ANY, title)

 {
 {

-#ifdef __WXMAC__
-       // we need this in order to allow the about menu relocation, since ABOUT is not the default id of the about menu 
-       wxApp::s_macAboutMenuItemId = Minimal_About ;
-#endif
-

     // set the frame icon
     // set the frame icon

-    SetIcon(wxICON(mondrian));
+    SetIcon(wxICON(sample));

 
 

+#if wxUSE_MENUS

     // create a menu bar
     // create a menu bar

-    wxMenu *menuFile = new wxMenu("", wxMENU_TEAROFF);
-
-#ifdef __WXMAC__
-       // since the about should be in the help menu for auto-relocation we have to do a little more...
-    wxMenu *helpMenu = new wxMenu("", wxMENU_TEAROFF);
-    helpMenu->Append(Minimal_About, "&About...\tCntrl+A", "Show about dialog");
-#else
-    menuFile->Append(Minimal_About, "&About...\tCtrl-A", "Show about dialog");
-    menuFile->AppendSeparator();
-#endif
+    wxMenu *fileMenu = new wxMenu;
+
+    // the "About" item should be in the help menu
+    wxMenu *helpMenu = new wxMenu;
+    helpMenu->Append(Minimal_About, "&About\tF1", "Show about dialog");
+
+    fileMenu->Append(Minimal_Quit, "E&xit\tAlt-X", "Quit this program");

 
 

-    menuFile->Append(Minimal_Quit, "E&xit\tAlt-X", "Quit this program");

     // now append the freshly created menu to the menu bar...
     wxMenuBar *menuBar = new wxMenuBar();
     // now append the freshly created menu to the menu bar...
     wxMenuBar *menuBar = new wxMenuBar();

-    menuBar->Append(menuFile, "&File");
-#ifdef __WXMAC__
+    menuBar->Append(fileMenu, "&File");

     menuBar->Append(helpMenu, "&Help");
     menuBar->Append(helpMenu, "&Help");

-#endif

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

+#endif // wxUSE_MENUS

 
 #if wxUSE_STATUSBAR
     // create a status bar just for fun (by default with 1 pane only)
     CreateStatusBar(2);
 
 #if wxUSE_STATUSBAR
     // create a status bar just for fun (by default with 1 pane only)
     CreateStatusBar(2);

-    SetStatusText("Welcome to wxWindows!");
+    SetStatusText("Welcome to wxWidgets!");

 #endif // wxUSE_STATUSBAR
 }
 
 #endif // wxUSE_STATUSBAR
 }
 


@@ -183,23 +179,22 @@ MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
 
 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 {
 
 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 {

-    // TRUE is to force the frame to close
-    Close(TRUE);
+    // true is to force the frame to close
+    Close(true);

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

-    wxString msg;
-    msg.Printf( _T("This is the about dialog of minimal sample.\n")
-                _T("Welcome to %s")
-#ifdef wxBETA_NUMBER
-               _T(" (beta %d)!")
-#endif // wxBETA_NUMBER
-               , wxVERSION_STRING
-#ifdef wxBETA_NUMBER
-               , wxBETA_NUMBER
-#endif // wxBETA_NUMBER
-              );
-
-    wxMessageBox(msg, "About Minimal", wxOK | wxICON_INFORMATION, this);
+    wxMessageBox(wxString::Format
+                 (
+                    "Welcome to %s!\n"
+                    "\n"
+                    "This is the minimal wxWidgets sample\n"
+                    "running under %s.",
+                    wxVERSION_STRING,
+                    wxGetOsDescription()
+                 ),
+                 "About wxWidgets minimal sample",
+                 wxOK | wxICON_INFORMATION,
+                 this);

 }
 }