src/gtk/app.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        app.cpp
// Purpose:
// Author:      Robert Roebling
// Id:          $Id$
// Copyright:   (c) 1998 Robert Roebling, Julian Smart
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifdef __VMS
// vms_jackets.h should for proper working be included before anything else
# include <vms_jackets.h>
#undef ConnectionNumber
#endif

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

#include "wx/app.h"
#include "wx/gdicmn.h"
#include "wx/utils.h"
#include "wx/intl.h"
#include "wx/log.h"
#include "wx/memory.h"
#include "wx/font.h"
#include "wx/settings.h"
#include "wx/dialog.h"
#include "wx/msgdlg.h"
#include "wx/file.h"
#include "wx/filename.h"
#include "wx/module.h"
#include "wx/image.h"
#include "wx/thread.h"

#ifdef __WXGPE__
#include <gpe/init.h>
#endif

#ifdef __WXUNIVERSAL__
    #include "wx/univ/theme.h"
    #include "wx/univ/renderer.h"
#endif

#if wxUSE_THREADS
    #include "wx/thread.h"
#endif

#include <unistd.h>

#ifdef HAVE_POLL
    #if defined(__VMS)
        #include <poll.h>
    #else
        // bug in the OpenBSD headers: at least in 3.1 there is no extern "C"
        // in neither poll.h nor sys/poll.h which results in link errors later
        #ifdef __OPENBSD__
            extern "C"
            {
        #endif

        #include <sys/poll.h>

        #ifdef __OPENBSD__
            };
        #endif
    #endif // platform
#else // !HAVE_POLL
    // we implement poll() ourselves using select() which is supposed exist in
    // all modern Unices
    #include <sys/types.h>
    #include <sys/time.h>
    #include <unistd.h>
#endif // HAVE_POLL/!HAVE_POLL

#include "wx/unix/private.h"
#include "wx/gtk/win_gtk.h"
#include "wx/gtk/private.h"

#include <gtk/gtk.h>

//-----------------------------------------------------------------------------
// link GnomeVFS
//-----------------------------------------------------------------------------

#if wxUSE_LIBGNOMEVFS
#include "wx/html/forcelnk.h"
FORCE_LINK(gnome_vfs)
#endif

//-----------------------------------------------------------------------------
// global data
//-----------------------------------------------------------------------------

bool   g_mainThreadLocked = FALSE;
gint   g_pendingTag = 0;

static GtkWidget *gs_RootWindow = (GtkWidget*) NULL;

//-----------------------------------------------------------------------------
// idle system
//-----------------------------------------------------------------------------

void wxapp_install_idle_handler();

#if wxUSE_THREADS
static wxMutex gs_idleTagsMutex;
#endif

//-----------------------------------------------------------------------------
// wxYield
//-----------------------------------------------------------------------------

// not static because used by textctrl.cpp
//
// MT-FIXME
bool wxIsInsideYield = FALSE;

bool wxApp::Yield(bool onlyIfNeeded)
{
    if ( wxIsInsideYield )
    {
        if ( !onlyIfNeeded )
        {
            wxFAIL_MSG( wxT("wxYield called recursively" ) );
        }

        return FALSE;
    }

#if wxUSE_THREADS
    if ( !wxThread::IsMain() )
    {
        // can't call gtk_main_iteration() from other threads like this
        return TRUE;
    }
#endif // wxUSE_THREADS

    wxIsInsideYield = TRUE;

    // We need to remove idle callbacks or the loop will
    // never finish.
    wxTheApp->RemoveIdleTag();

#if wxUSE_LOG
    // disable log flushing from here because a call to wxYield() shouldn't
    // normally result in message boxes popping up &c
    wxLog::Suspend();
#endif

    while (gtk_events_pending())
        gtk_main_iteration();

    // It's necessary to call ProcessIdle() to update the frames sizes which
    // might have been changed (it also will update other things set from
    // OnUpdateUI() which is a nice (and desired) side effect). But we
    // call ProcessIdle() only once since this is not meant for longish
    // background jobs (controlled by wxIdleEvent::RequestMore() and the
    // return value of Processidle().
    ProcessIdle();

#if wxUSE_LOG
    // let the logs be flashed again
    wxLog::Resume();
#endif

    wxIsInsideYield = FALSE;

    return TRUE;
}

//-----------------------------------------------------------------------------
// wxWakeUpIdle
//-----------------------------------------------------------------------------

// RR/KH: No wxMutexGui calls are needed here according to the GTK faq,
// http://www.gtk.org/faq/#AEN500 - this caused problems for wxPostEvent.

void wxApp::WakeUpIdle()
{
    wxapp_install_idle_handler();
}

//-----------------------------------------------------------------------------
// local functions
//-----------------------------------------------------------------------------

// the callback functions must be extern "C" to comply with GTK+ declarations
extern "C"
{

static gint wxapp_pending_callback( gpointer WXUNUSED(data) )
{
    if (!wxTheApp) return TRUE;

    // When getting called from GDK's time-out handler
    // we are no longer within GDK's grab on the GUI
    // thread so we must lock it here ourselves.
    gdk_threads_enter();

    // Sent idle event to all who request them.
    wxTheApp->ProcessPendingEvents();

    {
#if wxUSE_THREADS
        wxMutexLocker lock(gs_idleTagsMutex);
#endif
        g_pendingTag = 0;
    }

    // Flush the logged messages if any.
#if wxUSE_LOG
    wxLog::FlushActive();
#endif // wxUSE_LOG

    // Release lock again
    gdk_threads_leave();

    // Return FALSE to indicate that no more idle events are
    // to be sent (single shot instead of continuous stream)
    return FALSE;
}

static gint wxapp_idle_callback( gpointer WXUNUSED(data) )
{
    if (!wxTheApp)
        return TRUE;

#ifdef __WXDEBUG__
    // don't generate the idle events while the assert modal dialog is shown,
    // this completely confuses the apps which don't expect to be reentered
    // from some safely-looking functions
    if ( wxTheApp->IsInAssert() )
    {
        // But repaint the assertion message if necessary
        if (wxTopLevelWindows.GetCount() > 0)
        {
            wxWindow* win = (wxWindow*) wxTopLevelWindows.GetLast()->GetData();
            if (win->IsKindOf(CLASSINFO(wxMessageDialog)))
                win->OnInternalIdle();
        }
        return TRUE;
    }
#endif // __WXDEBUG__

    // When getting called from GDK's time-out handler
    // we are no longer within GDK's grab on the GUI
    // thread so we must lock it here ourselves.
    gdk_threads_enter();

    // Indicate that we are now in idle mode and event handlers
    // will have to reinstall the idle handler again.
    {
#if wxUSE_THREADS
        wxMutexLocker lock(gs_idleTagsMutex);
#endif
        g_isIdle = TRUE;
        wxTheApp->m_idleTag = 0;
    }

    bool moreIdles;

    // Send idle event to all who request them as long as
    // no events have popped up in the event queue.
    while ( (moreIdles = wxTheApp->ProcessIdle()) && gtk_events_pending() == 0)
        ;

    // Release lock again
    gdk_threads_leave();

    // Return FALSE if no more idle events are to be sent
    return moreIdles;
}

#if wxUSE_THREADS

#ifdef HAVE_POLL
    #define wxPoll poll
    #define wxPollFd pollfd
#else // !HAVE_POLL

typedef GPollFD wxPollFd;

int wxPoll(wxPollFd *ufds, unsigned int nfds, int timeout)
{
    // convert timeout from ms to struct timeval (s/us)
    timeval tv_timeout;
    tv_timeout.tv_sec = timeout/1000;
    tv_timeout.tv_usec = (timeout%1000)*1000;

    // remember the highest fd used here
    int fdMax = -1;

    // and fill the sets for select()
    fd_set readfds;
    fd_set writefds;
    fd_set exceptfds;
    wxFD_ZERO(&readfds);
    wxFD_ZERO(&writefds);
    wxFD_ZERO(&exceptfds);

    unsigned int i;
    for ( i = 0; i < nfds; i++ )
    {
        wxASSERT_MSG( ufds[i].fd < wxFD_SETSIZE, _T("fd out of range") );

        if ( ufds[i].events & G_IO_IN )
            wxFD_SET(ufds[i].fd, &readfds);

        if ( ufds[i].events & G_IO_PRI )
            wxFD_SET(ufds[i].fd, &exceptfds);

        if ( ufds[i].events & G_IO_OUT )
            wxFD_SET(ufds[i].fd, &writefds);

        if ( ufds[i].fd > fdMax )
            fdMax = ufds[i].fd;
    }

    fdMax++;
    int res = select(fdMax, &readfds, &writefds, &exceptfds, &tv_timeout);

    // translate the results back
    for ( i = 0; i < nfds; i++ )
    {
        ufds[i].revents = 0;

        if ( wxFD_ISSET(ufds[i].fd, &readfds ) )
            ufds[i].revents |= G_IO_IN;

        if ( wxFD_ISSET(ufds[i].fd, &exceptfds ) )
            ufds[i].revents |= G_IO_PRI;

        if ( wxFD_ISSET(ufds[i].fd, &writefds ) )
            ufds[i].revents |= G_IO_OUT;
    }

    return res;
}

#endif // HAVE_POLL/!HAVE_POLL

static gint wxapp_poll_func( GPollFD *ufds, guint nfds, gint timeout )
{
    gdk_threads_enter();

    wxMutexGuiLeave();
    g_mainThreadLocked = TRUE;

    // we rely on the fact that glib GPollFD struct is really just pollfd but
    // I wonder how wise is this in the long term (VZ)
    gint res = wxPoll( (wxPollFd *) ufds, nfds, timeout );

    wxMutexGuiEnter();
    g_mainThreadLocked = FALSE;

    gdk_threads_leave();

    return res;
}

#endif // wxUSE_THREADS

} // extern "C"

void wxapp_install_idle_handler()
{
#if wxUSE_THREADS
    wxMutexLocker lock(gs_idleTagsMutex);
#endif

    // Don't install the handler if it's already installed. This test *MUST*
    // be done when gs_idleTagsMutex is locked!
    if (!g_isIdle)
        return;

    // GD: this assert is raised when using the thread sample (which works)
    //     so the test is probably not so easy. Can widget callbacks be
    //     triggered from child threads and, if so, for which widgets?
    // wxASSERT_MSG( wxThread::IsMain() || gs_WakeUpIdle, wxT("attempt to install idle handler from widget callback in child thread (should be exclusively from wxWakeUpIdle)") );

    wxASSERT_MSG( wxTheApp->m_idleTag == 0, wxT("attempt to install idle handler twice") );

    g_isIdle = FALSE;

    if (g_pendingTag == 0)
        g_pendingTag = g_idle_add_full( 900, wxapp_pending_callback, NULL, NULL );

    // This routine gets called by all event handlers
    // indicating that the idle is over. It may also
    // get called from other thread for sending events
    // to the main thread (and processing these in
    // idle time). Very low priority.
    wxTheApp->m_idleTag = g_idle_add_full( 1000, wxapp_idle_callback, NULL, NULL );
}

//-----------------------------------------------------------------------------
// Access to the root window global
//-----------------------------------------------------------------------------

GtkWidget* wxGetRootWindow()
{
    if (gs_RootWindow == NULL)
    {
        gs_RootWindow = gtk_window_new( GTK_WINDOW_TOPLEVEL );
        gtk_widget_realize( gs_RootWindow );
    }
    return gs_RootWindow;
}

//-----------------------------------------------------------------------------
// wxApp
//-----------------------------------------------------------------------------

IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)

BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
    EVT_IDLE(wxAppBase::OnIdle)
END_EVENT_TABLE()

wxApp::wxApp()
{
#ifdef __WXDEBUG__
    m_isInAssert = FALSE;
#endif // __WXDEBUG__

    m_idleTag = 0;
    g_isIdle = TRUE;
    wxapp_install_idle_handler();

#if wxUSE_THREADS
    g_main_context_set_poll_func( NULL, wxapp_poll_func );
#endif

    m_colorCube = (unsigned char*) NULL;

    // this is NULL for a "regular" wxApp, but is set (and freed) by a wxGLApp
    m_glVisualInfo = (void *) NULL;
    m_glFBCInfo = (void *) NULL;
}

wxApp::~wxApp()
{
    if (m_idleTag)
        g_source_remove( m_idleTag );

    if (m_colorCube)
        free(m_colorCube);
}

bool wxApp::OnInitGui()
{
    if ( !wxAppBase::OnInitGui() )
        return FALSE;

    GdkVisual *visual = gdk_visual_get_system();

    // if this is a wxGLApp (derived from wxApp), and we've already
    // chosen a specific visual, then derive the GdkVisual from that
    if (m_glVisualInfo != NULL)
    {
        // seems gtk_widget_set_default_visual no longer exists?
        GdkVisual* vis = gtk_widget_get_default_visual();

        GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
        gtk_widget_set_default_colormap( colormap );

        visual = vis;
    }

    // On some machines, the default visual is just 256 colours, so
    // we make sure we get the best. This can sometimes be wasteful.

    else
    if ((gdk_visual_get_best() != gdk_visual_get_system()) && (m_useBestVisual))
    {
        /* seems gtk_widget_set_default_visual no longer exists? */
        GdkVisual* vis = gtk_widget_get_default_visual();

        GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
        gtk_widget_set_default_colormap( colormap );

        visual = vis;
    }

    // Nothing to do for 15, 16, 24, 32 bit displays
    if (visual->depth > 8) return TRUE;

    // initialize color cube for 8-bit color reduction dithering

    GdkColormap *cmap = gtk_widget_get_default_colormap();

    m_colorCube = (unsigned char*)malloc(32 * 32 * 32);

    for (int r = 0; r < 32; r++)
    {
        for (int g = 0; g < 32; g++)
        {
            for (int b = 0; b < 32; b++)
            {
                int rr = (r << 3) | (r >> 2);
                int gg = (g << 3) | (g >> 2);
                int bb = (b << 3) | (b >> 2);

                int index = -1;

                GdkColor *colors = cmap->colors;
                if (colors)
                {
                    int max = 3 * 65536;

                    for (int i = 0; i < cmap->size; i++)
                    {
                        int rdiff = ((rr << 8) - colors[i].red);
                        int gdiff = ((gg << 8) - colors[i].green);
                        int bdiff = ((bb << 8) - colors[i].blue);
                        int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
                        if (sum < max)
                        {
                            index = i; max = sum;
                        }
                    }
                }
                else
                {
                    // assume 8-bit true or static colors. this really exists
                    GdkVisual* vis = gdk_colormap_get_visual( cmap );
                    index = (r >> (5 - vis->red_prec)) << vis->red_shift;
                    index |= (g >> (5 - vis->green_prec)) << vis->green_shift;
                    index |= (b >> (5 - vis->blue_prec)) << vis->blue_shift;
                }
                m_colorCube[ (r*1024) + (g*32) + b ] = index;
            }
        }
    }

    return TRUE;
}

GdkVisual *wxApp::GetGdkVisual()
{
    GdkVisual *visual = NULL;

    if (m_glVisualInfo)
        visual = gdkx_visual_get( ((XVisualInfo *) m_glVisualInfo)->visualid );
    else
        visual = gdk_drawable_get_visual( wxGetRootWindow()->window );

    wxASSERT( visual );

    return visual;
}

bool wxApp::Initialize(int& argc, wxChar **argv)
{
    bool init_result;

#if wxUSE_THREADS
    // GTK 1.2 up to version 1.2.3 has broken threads
    if ((gtk_major_version == 1) &&
        (gtk_minor_version == 2) &&
        (gtk_micro_version < 4))
    {
        printf( "wxWidgets warning: GUI threading disabled due to outdated GTK version\n" );
    }
    else
    {
        if (!g_thread_supported())
            g_thread_init(NULL);
    }
#endif // wxUSE_THREADS

    gtk_set_locale();

    // We should have the wxUSE_WCHAR_T test on the _outside_
#if wxUSE_WCHAR_T
    // gtk+ 2.0 supports Unicode through UTF-8 strings
    wxConvCurrent = &wxConvUTF8;
#else // !wxUSE_WCHAR_T
    if (!wxOKlibc())
        wxConvCurrent = (wxMBConv*) NULL;
#endif // wxUSE_WCHAR_T/!wxUSE_WCHAR_T

    // decide which conversion to use for the file names

    // (1) this variable exists for the sole purpose of specifying the encoding
    //     of the filenames for GTK+ programs, so use it if it is set
    wxString encName(wxGetenv(_T("G_FILENAME_ENCODING")));
    encName = encName.BeforeFirst(_T(','));
    if (encName == _T("@locale"))
        encName.clear();
    encName.MakeUpper();
#if wxUSE_INTL
    if (encName.empty())
    {
        // (2) if a non default locale is set, assume that the user wants his
        //     filenames in this locale too
        encName = wxLocale::GetSystemEncodingName().Upper();
        // (3) finally use UTF-8 by default
        if (encName.empty() || encName == _T("US-ASCII"))
            encName = _T("UTF-8");
        wxSetEnv(_T("G_FILENAME_ENCODING"), encName);
    }
#else
    if (encName.empty())
        encName = _T("UTF-8");
#endif // wxUSE_INTL
    static wxConvBrokenFileNames fileconv(encName);
    wxConvFileName = &fileconv;

#if wxUSE_UNICODE
    // gtk_init() wants UTF-8, not wchar_t, so convert
    int i;
    char **argvGTK = new char *[argc + 1];
    for ( i = 0; i < argc; i++ )
    {
        argvGTK[i] = wxStrdupA(wxConvUTF8.cWX2MB(argv[i]));
    }

    argvGTK[argc] = NULL;

    int argcGTK = argc;

#ifdef __WXGPE__
    init_result = true;  // is there a _check() version of this?
    gpe_application_init( &argcGTK, &argvGTK );
#else
    init_result = gtk_init_check( &argcGTK, &argvGTK );
#endif

    if ( argcGTK != argc )
    {
        // we have to drop the parameters which were consumed by GTK+
        for ( i = 0; i < argcGTK; i++ )
        {
            while ( strcmp(wxConvUTF8.cWX2MB(argv[i]), argvGTK[i]) != 0 )
            {
                memmove(argv + i, argv + i + 1, argc - i);
            }
        }

        argc = argcGTK;
    }
    //else: gtk_init() didn't modify our parameters

    // free our copy
    for ( i = 0; i < argcGTK; i++ )
    {
        free(argvGTK[i]);
    }

    delete [] argvGTK;
#else // !wxUSE_UNICODE
    // gtk_init() shouldn't actually change argv itself (just its contents) so
    // it's ok to pass pointer to it
    init_result = gtk_init_check( &argc, &argv );
#endif // wxUSE_UNICODE/!wxUSE_UNICODE

    if (!init_result) {
        wxLogError(wxT("Unable to initialize gtk, is DISPLAY set properly?"));
        return false;
    }

    // we can not enter threads before gtk_init is done
    gdk_threads_enter();

    if ( !wxAppBase::Initialize(argc, argv) )
    {
        gdk_threads_leave();

        return false;
    }

    wxSetDetectableAutoRepeat( TRUE );

#if wxUSE_INTL
    wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
#endif

    return true;
}

void wxApp::CleanUp()
{
    gdk_threads_leave();

    wxAppBase::CleanUp();
}

#ifdef __WXDEBUG__

void wxApp::OnAssert(const wxChar *file, int line, const wxChar* cond, const wxChar *msg)
{
    m_isInAssert = TRUE;

    wxAppBase::OnAssert(file, line, cond, msg);

    m_isInAssert = FALSE;
}

#endif // __WXDEBUG__

void wxApp::RemoveIdleTag()
{
#if wxUSE_THREADS
    wxMutexLocker lock(gs_idleTagsMutex);
#endif
    if (!g_isIdle)
    {
        g_source_remove( wxTheApp->m_idleTag );
        wxTheApp->m_idleTag = 0;
        g_isIdle = TRUE;
    }
}
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: app.cpp
	3	// Purpose:
	4	// Author: Robert Roebling
	5	// Id: $Id$
	6	// Copyright: (c) 1998 Robert Roebling, Julian Smart
	7	// Licence: wxWindows licence
	8	/////////////////////////////////////////////////////////////////////////////
	9
	10	#ifdef __VMS
	11	// vms_jackets.h should for proper working be included before anything else
	12	# include <vms_jackets.h>
	13	#undef ConnectionNumber
	14	#endif
	15
	16	// For compilers that support precompilation, includes "wx.h".
	17	#include "wx/wxprec.h"
	18
	19	#include "wx/app.h"
	20	#include "wx/gdicmn.h"
	21	#include "wx/utils.h"
	22	#include "wx/intl.h"
	23	#include "wx/log.h"
	24	#include "wx/memory.h"
	25	#include "wx/font.h"
	26	#include "wx/settings.h"
	27	#include "wx/dialog.h"
	28	#include "wx/msgdlg.h"
	29	#include "wx/file.h"
	30	#include "wx/filename.h"
	31	#include "wx/module.h"
	32	#include "wx/image.h"
	33	#include "wx/thread.h"
	34
	35	#ifdef __WXGPE__
	36	#include <gpe/init.h>
	37	#endif
	38
	39	#ifdef __WXUNIVERSAL__
	40	#include "wx/univ/theme.h"
	41	#include "wx/univ/renderer.h"
	42	#endif
	43
	44	#if wxUSE_THREADS
	45	#include "wx/thread.h"
	46	#endif
	47
	48	#include <unistd.h>
	49
	50	#ifdef HAVE_POLL
	51	#if defined(__VMS)
	52	#include <poll.h>
	53	#else
	54	// bug in the OpenBSD headers: at least in 3.1 there is no extern "C"
	55	// in neither poll.h nor sys/poll.h which results in link errors later
	56	#ifdef __OPENBSD__
	57	extern "C"
	58	{
	59	#endif
	60
	61	#include <sys/poll.h>
	62
	63	#ifdef __OPENBSD__
	64	};
	65	#endif
	66	#endif // platform
	67	#else // !HAVE_POLL
	68	// we implement poll() ourselves using select() which is supposed exist in
	69	// all modern Unices
	70	#include <sys/types.h>
	71	#include <sys/time.h>
	72	#include <unistd.h>
	73	#endif // HAVE_POLL/!HAVE_POLL
	74
	75	#include "wx/unix/private.h"
	76	#include "wx/gtk/win_gtk.h"
	77	#include "wx/gtk/private.h"
	78
	79	#include <gtk/gtk.h>
	80
	81	//-----------------------------------------------------------------------------
	82	// link GnomeVFS
	83	//-----------------------------------------------------------------------------
	84
	85	#if wxUSE_LIBGNOMEVFS
	86	#include "wx/html/forcelnk.h"
	87	FORCE_LINK(gnome_vfs)
	88	#endif
	89
	90	//-----------------------------------------------------------------------------
	91	// global data
	92	//-----------------------------------------------------------------------------
	93
	94	bool g_mainThreadLocked = FALSE;
	95	gint g_pendingTag = 0;
	96
	97	static GtkWidget gs_RootWindow = (GtkWidget) NULL;
	98
	99	//-----------------------------------------------------------------------------
	100	// idle system
	101	//-----------------------------------------------------------------------------
	102
	103	void wxapp_install_idle_handler();
	104
	105	#if wxUSE_THREADS
	106	static wxMutex gs_idleTagsMutex;
	107	#endif
	108
	109	//-----------------------------------------------------------------------------
	110	// wxYield
	111	//-----------------------------------------------------------------------------
	112
	113	// not static because used by textctrl.cpp
	114	//
	115	// MT-FIXME
	116	bool wxIsInsideYield = FALSE;
	117
	118	bool wxApp::Yield(bool onlyIfNeeded)
	119	{
	120	if ( wxIsInsideYield )
	121	{
	122	if ( !onlyIfNeeded )
	123	{
	124	wxFAIL_MSG( wxT("wxYield called recursively" ) );
	125	}
	126
	127	return FALSE;
	128	}
	129
	130	#if wxUSE_THREADS
	131	if ( !wxThread::IsMain() )
	132	{
	133	// can't call gtk_main_iteration() from other threads like this
	134	return TRUE;
	135	}
	136	#endif // wxUSE_THREADS
	137
	138	wxIsInsideYield = TRUE;
	139
	140	// We need to remove idle callbacks or the loop will
	141	// never finish.
	142	wxTheApp->RemoveIdleTag();
	143
	144	#if wxUSE_LOG
	145	// disable log flushing from here because a call to wxYield() shouldn't
	146	// normally result in message boxes popping up &c
	147	wxLog::Suspend();
	148	#endif
	149
	150	while (gtk_events_pending())
	151	gtk_main_iteration();
	152
	153	// It's necessary to call ProcessIdle() to update the frames sizes which
	154	// might have been changed (it also will update other things set from
	155	// OnUpdateUI() which is a nice (and desired) side effect). But we
	156	// call ProcessIdle() only once since this is not meant for longish
	157	// background jobs (controlled by wxIdleEvent::RequestMore() and the
	158	// return value of Processidle().
	159	ProcessIdle();
	160
	161	#if wxUSE_LOG
	162	// let the logs be flashed again
	163	wxLog::Resume();
	164	#endif
	165
	166	wxIsInsideYield = FALSE;
	167
	168	return TRUE;
	169	}
	170
	171	//-----------------------------------------------------------------------------
	172	// wxWakeUpIdle
	173	//-----------------------------------------------------------------------------
	174
	175	// RR/KH: No wxMutexGui calls are needed here according to the GTK faq,
	176	// http://www.gtk.org/faq/#AEN500 - this caused problems for wxPostEvent.
	177
	178	void wxApp::WakeUpIdle()
	179	{
	180	wxapp_install_idle_handler();
	181	}
	182
	183	//-----------------------------------------------------------------------------
	184	// local functions
	185	//-----------------------------------------------------------------------------
	186
	187	// the callback functions must be extern "C" to comply with GTK+ declarations
	188	extern "C"
	189	{
	190
	191	static gint wxapp_pending_callback( gpointer WXUNUSED(data) )
	192	{
	193	if (!wxTheApp) return TRUE;
	194
	195	// When getting called from GDK's time-out handler
	196	// we are no longer within GDK's grab on the GUI
	197	// thread so we must lock it here ourselves.
	198	gdk_threads_enter();
	199
	200	// Sent idle event to all who request them.
	201	wxTheApp->ProcessPendingEvents();
	202
	203	{
	204	#if wxUSE_THREADS
	205	wxMutexLocker lock(gs_idleTagsMutex);
	206	#endif
	207	g_pendingTag = 0;
	208	}
	209
	210	// Flush the logged messages if any.
	211	#if wxUSE_LOG
	212	wxLog::FlushActive();
	213	#endif // wxUSE_LOG
	214
	215	// Release lock again
	216	gdk_threads_leave();
	217
	218	// Return FALSE to indicate that no more idle events are
	219	// to be sent (single shot instead of continuous stream)
	220	return FALSE;
	221	}
	222
	223	static gint wxapp_idle_callback( gpointer WXUNUSED(data) )
	224	{
	225	if (!wxTheApp)
	226	return TRUE;
	227
	228	#ifdef __WXDEBUG__
	229	// don't generate the idle events while the assert modal dialog is shown,
	230	// this completely confuses the apps which don't expect to be reentered
	231	// from some safely-looking functions
	232	if ( wxTheApp->IsInAssert() )
	233	{
	234	// But repaint the assertion message if necessary
	235	if (wxTopLevelWindows.GetCount() > 0)
	236	{
	237	wxWindow* win = (wxWindow*) wxTopLevelWindows.GetLast()->GetData();
	238	if (win->IsKindOf(CLASSINFO(wxMessageDialog)))
	239	win->OnInternalIdle();
	240	}
	241	return TRUE;
	242	}
	243	#endif // __WXDEBUG__
	244
	245	// When getting called from GDK's time-out handler
	246	// we are no longer within GDK's grab on the GUI
	247	// thread so we must lock it here ourselves.
	248	gdk_threads_enter();
	249
	250	// Indicate that we are now in idle mode and event handlers
	251	// will have to reinstall the idle handler again.
	252	{
	253	#if wxUSE_THREADS
	254	wxMutexLocker lock(gs_idleTagsMutex);
	255	#endif
	256	g_isIdle = TRUE;
	257	wxTheApp->m_idleTag = 0;
	258	}
	259
	260	bool moreIdles;
	261
	262	// Send idle event to all who request them as long as
	263	// no events have popped up in the event queue.
	264	while ( (moreIdles = wxTheApp->ProcessIdle()) && gtk_events_pending() == 0)
	265	;
	266
	267	// Release lock again
	268	gdk_threads_leave();
	269
	270	// Return FALSE if no more idle events are to be sent
	271	return moreIdles;
	272	}
	273
	274	#if wxUSE_THREADS
	275
	276	#ifdef HAVE_POLL
	277	#define wxPoll poll
	278	#define wxPollFd pollfd
	279	#else // !HAVE_POLL
	280
	281	typedef GPollFD wxPollFd;
	282
	283	int wxPoll(wxPollFd *ufds, unsigned int nfds, int timeout)
	284	{
	285	// convert timeout from ms to struct timeval (s/us)
	286	timeval tv_timeout;
	287	tv_timeout.tv_sec = timeout/1000;
	288	tv_timeout.tv_usec = (timeout%1000)*1000;
	289
	290	// remember the highest fd used here
	291	int fdMax = -1;
	292
	293	// and fill the sets for select()
	294	fd_set readfds;
	295	fd_set writefds;
	296	fd_set exceptfds;
	297	wxFD_ZERO(&readfds);
	298	wxFD_ZERO(&writefds);
	299	wxFD_ZERO(&exceptfds);
	300
	301	unsigned int i;
	302	for ( i = 0; i < nfds; i++ )
	303	{
	304	wxASSERT_MSG( ufds[i].fd < wxFD_SETSIZE, _T("fd out of range") );
	305
	306	if ( ufds[i].events & G_IO_IN )
	307	wxFD_SET(ufds[i].fd, &readfds);
	308
	309	if ( ufds[i].events & G_IO_PRI )
	310	wxFD_SET(ufds[i].fd, &exceptfds);
	311
	312	if ( ufds[i].events & G_IO_OUT )
	313	wxFD_SET(ufds[i].fd, &writefds);
	314
	315	if ( ufds[i].fd > fdMax )
	316	fdMax = ufds[i].fd;
	317	}
	318
	319	fdMax++;
	320	int res = select(fdMax, &readfds, &writefds, &exceptfds, &tv_timeout);
	321
	322	// translate the results back
	323	for ( i = 0; i < nfds; i++ )
	324	{
	325	ufds[i].revents = 0;
	326
	327	if ( wxFD_ISSET(ufds[i].fd, &readfds ) )
	328	ufds[i].revents \|= G_IO_IN;
	329
	330	if ( wxFD_ISSET(ufds[i].fd, &exceptfds ) )
	331	ufds[i].revents \|= G_IO_PRI;
	332
	333	if ( wxFD_ISSET(ufds[i].fd, &writefds ) )
	334	ufds[i].revents \|= G_IO_OUT;
	335	}
	336
	337	return res;
	338	}
	339
	340	#endif // HAVE_POLL/!HAVE_POLL
	341
	342	static gint wxapp_poll_func( GPollFD *ufds, guint nfds, gint timeout )
	343	{
	344	gdk_threads_enter();
	345
	346	wxMutexGuiLeave();
	347	g_mainThreadLocked = TRUE;
	348
	349	// we rely on the fact that glib GPollFD struct is really just pollfd but
	350	// I wonder how wise is this in the long term (VZ)
	351	gint res = wxPoll( (wxPollFd *) ufds, nfds, timeout );
	352
	353	wxMutexGuiEnter();
	354	g_mainThreadLocked = FALSE;
	355
	356	gdk_threads_leave();
	357
	358	return res;
	359	}
	360
	361	#endif // wxUSE_THREADS
	362
	363	} // extern "C"
	364
	365	void wxapp_install_idle_handler()
	366	{
	367	#if wxUSE_THREADS
	368	wxMutexLocker lock(gs_idleTagsMutex);
	369	#endif
	370
	371	// Don't install the handler if it's already installed. This test MUST
	372	// be done when gs_idleTagsMutex is locked!
	373	if (!g_isIdle)
	374	return;
	375
	376	// GD: this assert is raised when using the thread sample (which works)
	377	// so the test is probably not so easy. Can widget callbacks be
	378	// triggered from child threads and, if so, for which widgets?
	379	// wxASSERT_MSG( wxThread::IsMain() \|\| gs_WakeUpIdle, wxT("attempt to install idle handler from widget callback in child thread (should be exclusively from wxWakeUpIdle)") );
	380
	381	wxASSERT_MSG( wxTheApp->m_idleTag == 0, wxT("attempt to install idle handler twice") );
	382
	383	g_isIdle = FALSE;
	384
	385	if (g_pendingTag == 0)
	386	g_pendingTag = g_idle_add_full( 900, wxapp_pending_callback, NULL, NULL );
	387
	388	// This routine gets called by all event handlers
	389	// indicating that the idle is over. It may also
	390	// get called from other thread for sending events
	391	// to the main thread (and processing these in
	392	// idle time). Very low priority.
	393	wxTheApp->m_idleTag = g_idle_add_full( 1000, wxapp_idle_callback, NULL, NULL );
	394	}
	395
	396	//-----------------------------------------------------------------------------
	397	// Access to the root window global
	398	//-----------------------------------------------------------------------------
	399
	400	GtkWidget* wxGetRootWindow()
	401	{
	402	if (gs_RootWindow == NULL)
	403	{
	404	gs_RootWindow = gtk_window_new( GTK_WINDOW_TOPLEVEL );
	405	gtk_widget_realize( gs_RootWindow );
	406	}
	407	return gs_RootWindow;
	408	}
	409
	410	//-----------------------------------------------------------------------------
	411	// wxApp
	412	//-----------------------------------------------------------------------------
	413
	414	IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)
	415
	416	BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
	417	EVT_IDLE(wxAppBase::OnIdle)
	418	END_EVENT_TABLE()
	419
	420	wxApp::wxApp()
	421	{
	422	#ifdef __WXDEBUG__
	423	m_isInAssert = FALSE;
	424	#endif // __WXDEBUG__
	425
	426	m_idleTag = 0;
	427	g_isIdle = TRUE;
	428	wxapp_install_idle_handler();
	429
	430	#if wxUSE_THREADS
	431	g_main_context_set_poll_func( NULL, wxapp_poll_func );
	432	#endif
	433
	434	m_colorCube = (unsigned char*) NULL;
	435
	436	// this is NULL for a "regular" wxApp, but is set (and freed) by a wxGLApp
	437	m_glVisualInfo = (void *) NULL;
	438	m_glFBCInfo = (void *) NULL;
	439	}
	440
	441	wxApp::~wxApp()
	442	{
	443	if (m_idleTag)
	444	g_source_remove( m_idleTag );
	445
	446	if (m_colorCube)
	447	free(m_colorCube);
	448	}
	449
	450	bool wxApp::OnInitGui()
	451	{
	452	if ( !wxAppBase::OnInitGui() )
	453	return FALSE;
	454
	455	GdkVisual *visual = gdk_visual_get_system();
	456
	457	// if this is a wxGLApp (derived from wxApp), and we've already
	458	// chosen a specific visual, then derive the GdkVisual from that
	459	if (m_glVisualInfo != NULL)
	460	{
	461	// seems gtk_widget_set_default_visual no longer exists?
	462	GdkVisual* vis = gtk_widget_get_default_visual();
	463
	464	GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
	465	gtk_widget_set_default_colormap( colormap );
	466
	467	visual = vis;
	468	}
	469
	470	// On some machines, the default visual is just 256 colours, so
	471	// we make sure we get the best. This can sometimes be wasteful.
	472
	473	else
	474	if ((gdk_visual_get_best() != gdk_visual_get_system()) && (m_useBestVisual))
	475	{
	476	/* seems gtk_widget_set_default_visual no longer exists? */
	477	GdkVisual* vis = gtk_widget_get_default_visual();
	478
	479	GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
	480	gtk_widget_set_default_colormap( colormap );
	481
	482	visual = vis;
	483	}
	484
	485	// Nothing to do for 15, 16, 24, 32 bit displays
	486	if (visual->depth > 8) return TRUE;
	487
	488	// initialize color cube for 8-bit color reduction dithering
	489
	490	GdkColormap *cmap = gtk_widget_get_default_colormap();
	491
	492	m_colorCube = (unsigned char)malloc(32 32 * 32);
	493
	494	for (int r = 0; r < 32; r++)
	495	{
	496	for (int g = 0; g < 32; g++)
	497	{
	498	for (int b = 0; b < 32; b++)
	499	{
	500	int rr = (r << 3) \| (r >> 2);
	501	int gg = (g << 3) \| (g >> 2);
	502	int bb = (b << 3) \| (b >> 2);
	503
	504	int index = -1;
	505
	506	GdkColor *colors = cmap->colors;
	507	if (colors)
	508	{
	509	int max = 3 * 65536;
	510
	511	for (int i = 0; i < cmap->size; i++)
	512	{
	513	int rdiff = ((rr << 8) - colors[i].red);
	514	int gdiff = ((gg << 8) - colors[i].green);
	515	int bdiff = ((bb << 8) - colors[i].blue);
	516	int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
	517	if (sum < max)
	518	{
	519	index = i; max = sum;
	520	}
	521	}
	522	}
	523	else
	524	{
	525	// assume 8-bit true or static colors. this really exists
	526	GdkVisual* vis = gdk_colormap_get_visual( cmap );
	527	index = (r >> (5 - vis->red_prec)) << vis->red_shift;
	528	index \|= (g >> (5 - vis->green_prec)) << vis->green_shift;
	529	index \|= (b >> (5 - vis->blue_prec)) << vis->blue_shift;
	530	}
	531	m_colorCube[ (r1024) + (g32) + b ] = index;
	532	}
	533	}
	534	}
	535
	536	return TRUE;
	537	}
	538
	539	GdkVisual *wxApp::GetGdkVisual()
	540	{
	541	GdkVisual *visual = NULL;
	542
	543	if (m_glVisualInfo)
	544	visual = gdkx_visual_get( ((XVisualInfo *) m_glVisualInfo)->visualid );
	545	else
	546	visual = gdk_drawable_get_visual( wxGetRootWindow()->window );
	547
	548	wxASSERT( visual );
	549
	550	return visual;
	551	}
	552
	553	bool wxApp::Initialize(int& argc, wxChar **argv)
	554	{
	555	bool init_result;
	556
	557	#if wxUSE_THREADS
	558	// GTK 1.2 up to version 1.2.3 has broken threads
	559	if ((gtk_major_version == 1) &&
	560	(gtk_minor_version == 2) &&
	561	(gtk_micro_version < 4))
	562	{
	563	printf( "wxWidgets warning: GUI threading disabled due to outdated GTK version\n" );
	564	}
	565	else
	566	{
	567	if (!g_thread_supported())
	568	g_thread_init(NULL);
	569	}
	570	#endif // wxUSE_THREADS
	571
	572	gtk_set_locale();
	573
	574	// We should have the wxUSE_WCHAR_T test on the _outside_
	575	#if wxUSE_WCHAR_T
	576	// gtk+ 2.0 supports Unicode through UTF-8 strings
	577	wxConvCurrent = &wxConvUTF8;
	578	#else // !wxUSE_WCHAR_T
	579	if (!wxOKlibc())
	580	wxConvCurrent = (wxMBConv*) NULL;
	581	#endif // wxUSE_WCHAR_T/!wxUSE_WCHAR_T
	582
	583	// decide which conversion to use for the file names
	584
	585	// (1) this variable exists for the sole purpose of specifying the encoding
	586	// of the filenames for GTK+ programs, so use it if it is set
	587	wxString encName(wxGetenv(_T("G_FILENAME_ENCODING")));
	588	encName = encName.BeforeFirst(_T(','));
	589	if (encName == _T("@locale"))
	590	encName.clear();
	591	encName.MakeUpper();
	592	#if wxUSE_INTL
	593	if (encName.empty())
	594	{
	595	// (2) if a non default locale is set, assume that the user wants his
	596	// filenames in this locale too
	597	encName = wxLocale::GetSystemEncodingName().Upper();
	598	// (3) finally use UTF-8 by default
	599	if (encName.empty() \|\| encName == _T("US-ASCII"))
	600	encName = _T("UTF-8");
	601	wxSetEnv(_T("G_FILENAME_ENCODING"), encName);
	602	}
	603	#else
	604	if (encName.empty())
	605	encName = _T("UTF-8");
	606	#endif // wxUSE_INTL
	607	static wxConvBrokenFileNames fileconv(encName);
	608	wxConvFileName = &fileconv;
	609
	610	#if wxUSE_UNICODE
	611	// gtk_init() wants UTF-8, not wchar_t, so convert
	612	int i;
	613	char *argvGTK = new char [argc + 1];
	614	for ( i = 0; i < argc; i++ )
	615	{
	616	argvGTK[i] = wxStrdupA(wxConvUTF8.cWX2MB(argv[i]));
	617	}
	618
	619	argvGTK[argc] = NULL;
	620
	621	int argcGTK = argc;
	622
	623	#ifdef __WXGPE__
	624	init_result = true; // is there a _check() version of this?
	625	gpe_application_init( &argcGTK, &argvGTK );
	626	#else
	627	init_result = gtk_init_check( &argcGTK, &argvGTK );
	628	#endif
	629
	630	if ( argcGTK != argc )
	631	{
	632	// we have to drop the parameters which were consumed by GTK+
	633	for ( i = 0; i < argcGTK; i++ )
	634	{
	635	while ( strcmp(wxConvUTF8.cWX2MB(argv[i]), argvGTK[i]) != 0 )
	636	{
	637	memmove(argv + i, argv + i + 1, argc - i);
	638	}
	639	}
	640
	641	argc = argcGTK;
	642	}
	643	//else: gtk_init() didn't modify our parameters
	644
	645	// free our copy
	646	for ( i = 0; i < argcGTK; i++ )
	647	{
	648	free(argvGTK[i]);
	649	}
	650
	651	delete [] argvGTK;
	652	#else // !wxUSE_UNICODE
	653	// gtk_init() shouldn't actually change argv itself (just its contents) so
	654	// it's ok to pass pointer to it
	655	init_result = gtk_init_check( &argc, &argv );
	656	#endif // wxUSE_UNICODE/!wxUSE_UNICODE
	657
	658	if (!init_result) {
	659	wxLogError(wxT("Unable to initialize gtk, is DISPLAY set properly?"));
	660	return false;
	661	}
	662
	663	// we can not enter threads before gtk_init is done
	664	gdk_threads_enter();
	665
	666	if ( !wxAppBase::Initialize(argc, argv) )
	667	{
	668	gdk_threads_leave();
	669
	670	return false;
	671	}
	672
	673	wxSetDetectableAutoRepeat( TRUE );
	674
	675	#if wxUSE_INTL
	676	wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
	677	#endif
	678
	679	return true;
	680	}
	681
	682	void wxApp::CleanUp()
	683	{
	684	gdk_threads_leave();
	685
	686	wxAppBase::CleanUp();
	687	}
	688
	689	#ifdef __WXDEBUG__
	690
	691	void wxApp::OnAssert(const wxChar file, int line, const wxChar cond, const wxChar *msg)
	692	{
	693	m_isInAssert = TRUE;
	694
	695	wxAppBase::OnAssert(file, line, cond, msg);
	696
	697	m_isInAssert = FALSE;
	698	}
	699
	700	#endif // __WXDEBUG__
	701
	702	void wxApp::RemoveIdleTag()
	703	{
	704	#if wxUSE_THREADS
	705	wxMutexLocker lock(gs_idleTagsMutex);
	706	#endif
	707	if (!g_isIdle)
	708	{
	709	g_source_remove( wxTheApp->m_idleTag );
	710	wxTheApp->m_idleTag = 0;
	711	g_isIdle = TRUE;
	712	}
	713	}