wxwidgets/samples/xrc/xrcdemo.cpp
Vadim Zeitlin 4f4c5fcfdf Use nullptr instead of NULL in the code and documentation
This is a combination of running clang-tidy with modernize-use-nullptr
check for some ports (GTK, X11, OSX) and manual changes to the ports for
which it couldn't be used easily (MSW, DFB) and also manually updating
the docs.

Also replace NULL with null or nullptr in the comments as this is more
consistent with the use of nullptr in the code and makes it simpler to
grep for the remaining occurrences of NULL itself.

And also use null in the assert messages.

Only a few occurrences of "NULL" are still left in non-C files, mostly
corresponding to unclear comments or string output which it might not be
safe to change.
2022-10-18 01:25:25 +02:00

125 lines
4.7 KiB
C++

//-----------------------------------------------------------------------------
// Name: xrcdemo.cpp
// Purpose: XML resources sample: Main application file
// Author: Robert O'Connor (rob@medicalmnemonics.com), Vaclav Slavik
// Copyright: (c) Robert O'Connor and Vaclav Slavik
// Licence: wxWindows licence
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// Standard wxWidgets headers
//-----------------------------------------------------------------------------
// For compilers that support precompilation, includes "wx/wx.h".
#include "wx/wxprec.h"
// For all others, include the necessary headers (this file is usually all you
// need because it includes almost all "standard" wxWidgets headers)
#ifndef WX_PRECOMP
#include "wx/wx.h"
#endif
//-----------------------------------------------------------------------------
// Header of this .cpp file
//-----------------------------------------------------------------------------
#include "xrcdemo.h"
//-----------------------------------------------------------------------------
// Remaining headers: Needed wx headers, then wx/contrib headers, then app one
//-----------------------------------------------------------------------------
#include "wx/image.h" // wxImage
#include "wx/xrc/xmlres.h" // XRC XML resources
#if wxUSE_RIBBON
#include "wx/xrc/xh_ribbon.h"
#endif // wxUSE_RIBBON
#if wxUSE_AUI
#include "wx/xrc/xh_aui.h"
#include "wx/xrc/xh_auitoolb.h"
#endif // wxUSE_AUI
#include "wx/cshelp.h" // wxSimpleHelpProvider for helptext
#include "myframe.h"
//-----------------------------------------------------------------------------
// wxWidgets macro: Declare the application.
//-----------------------------------------------------------------------------
// Create a new application object: this macro will allow wxWidgets 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. the_app and
// not wxApp).
wxIMPLEMENT_APP(MyApp);
//-----------------------------------------------------------------------------
// Public methods
//-----------------------------------------------------------------------------
// 'Main program' equivalent: the program execution "starts" here
bool MyApp::OnInit()
{
if ( !wxApp::OnInit() )
return false;
// If there is any of a certain format of image in the xrcs, then first
// load a handler for that image type. This example uses XPMs & a gif, but
// if you want PNGs, then add a PNG handler, etc. See wxImage::AddHandler()
// documentation for the types of image handlers available.
#if wxUSE_XPM
wxImage::AddHandler(new wxXPMHandler);
#endif
#if wxUSE_GIF
wxImage::AddHandler(new wxGIFHandler);
#endif
// Initialize all the XRC handlers. Always required (unless you feel like
// going through and initializing a handler of each control type you will
// be using (ie initialize the spinctrl handler, initialize the textctrl
// handler). However, if you are only using a few control types, it will
// save some space to only initialize the ones you will be using. See
// wxXRC docs for details.
wxXmlResource::Get()->InitAllHandlers();
// Allow using environment variables in the file paths in the resources,
// while keeping the default wxXRC_USE_LOCALE flag.
wxXmlResource::Get()->SetFlags(wxXRC_USE_LOCALE | wxXRC_USE_ENVVARS);
#if wxUSE_RIBBON
wxXmlResource::Get()->AddHandler(new wxRibbonXmlHandler);
#endif
#if wxUSE_AUI
wxXmlResource::Get()->AddHandler(new wxAuiXmlHandler);
wxXmlResource::Get()->AddHandler(new wxAuiToolBarXmlHandler);
#endif
// Load all of the XRC files that will be used. You can put everything
// into one giant XRC file if you wanted, but then they become more
// difficult to manage, and harder to reuse in later projects.
if ( !wxXmlResource::Get()->LoadAllFiles("rc") )
return false;
#if wxUSE_HELP
// Use the simple help provider to show the context-sensitive help
wxHelpProvider::Set( new wxSimpleHelpProvider );
#endif // wxUSE_HELP
// Make an instance of your derived frame. Passing nullptr (the default value
// of MyFrame's constructor is null) as the frame doesn't have a parent
// since it is the main application window.
MyFrame *frame = new MyFrame();
// Show the frame as it's created initially hidden.
frame->Show(true);
// Return true to tell program to continue (false would terminate).
return true;
}