src/gtk1/app.cpp

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

#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
    #pragma implementation "app.h"
#endif

#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/gtk/win_gtk.h"

#include <gtk/gtk.h>


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

bool   g_mainThreadLocked = FALSE;
gint   g_pendingTag = 0;

static GtkWidget *gs_RootWindow = (GtkWidget*) NULL;

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

extern bool g_isIdle;

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();

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

    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();

    // let the logs be flashed again
    wxLog::Resume();

    wxIsInsideYield = FALSE;

    return TRUE;
}

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

// RR/KH: The wxMutexGui calls are not needed on GTK2 according to
// the GTK faq, http://www.gtk.org/faq/#AEN500
// The calls to gdk_threads_enter() and leave() are specifically noted
// as not being necessary.  The MutexGui calls are still left in for GTK1.
// Eliminating the MutexGui calls fixes the long-standing "random" lockup
// when using wxPostEvent (which calls WakeUpIdle) from a thread.

void wxApp::WakeUpIdle()
{
#ifndef __WXGTK20__
#if wxUSE_THREADS
    if (!wxThread::IsMain())
        wxMutexGuiEnter();
#endif // wxUSE_THREADS_
#endif // __WXGTK2__

    wxapp_install_idle_handler();

#ifndef __WXGTK20__
#if wxUSE_THREADS
    if (!wxThread::IsMain())
        wxMutexGuiLeave();
#endif // wxUSE_THREADS_
#endif // __WXGTK2__
}

//-----------------------------------------------------------------------------
// 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();
#ifdef __WXGTK20__
            if (win->IsKindOf(CLASSINFO(wxMessageDialog)))
#else
            if (win->IsKindOf(CLASSINFO(wxGenericMessageDialog)))
#endif
                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;
    }

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

    // 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;
}

#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;
    FD_ZERO(&readfds);
    FD_ZERO(&writefds);
    FD_ZERO(&exceptfds);

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

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

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

        if ( ufds[i].events & G_IO_OUT )
            FD_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 ( FD_ISSET(ufds[i].fd, &readfds ) )
            ufds[i].revents |= G_IO_IN;

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

        if ( FD_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 = gtk_idle_add_priority( 900, wxapp_pending_callback, (gpointer) 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 = gtk_idle_add_priority( 1000, wxapp_idle_callback, (gpointer) 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_set_poll_func( 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;
}

wxApp::~wxApp()
{
    if (m_idleTag) gtk_idle_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)
    {
#ifdef __WXGTK20__
        // seems gtk_widget_set_default_visual no longer exists?
        GdkVisual* vis = gtk_widget_get_default_visual();
#else
        GdkVisual* vis = gdkx_visual_get(
            ((XVisualInfo *) m_glVisualInfo) ->visualid );
        gtk_widget_set_default_visual( vis );
#endif

        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))
    {
#ifdef __WXGTK20__
        /* seems gtk_widget_set_default_visual no longer exists? */
        GdkVisual* vis = gtk_widget_get_default_visual();
#else
        GdkVisual* vis = gdk_visual_get_best();
        gtk_widget_set_default_visual( vis );
#endif

        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_window_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
    #if defined(__WXGTK20__)
        // gtk+ 2.0 supports Unicode through UTF-8 strings
        wxConvCurrent = &wxConvUTF8;
    #else // GTK 1.x
        if (!wxOKlibc())
            wxConvCurrent = &wxConvLocal;
    #endif
#else // !wxUSE_WCHAR_T
    if (!wxOKlibc())
        wxConvCurrent = (wxMBConv*) NULL;
#endif // wxUSE_WCHAR_T/!wxUSE_WCHAR_T

#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)
    {
        gtk_idle_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	#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
	11	#pragma implementation "app.h"
	12	#endif
	13
	14	#ifdef __VMS
	15	// vms_jackets.h should for proper working be included before anything else
	16	# include <vms_jackets.h>
	17	#undef ConnectionNumber
	18	#endif
	19
	20	// For compilers that support precompilation, includes "wx.h".
	21	#include "wx/wxprec.h"
	22
	23	#include "wx/app.h"
	24	#include "wx/gdicmn.h"
	25	#include "wx/utils.h"
	26	#include "wx/intl.h"
	27	#include "wx/log.h"
	28	#include "wx/memory.h"
	29	#include "wx/font.h"
	30	#include "wx/settings.h"
	31	#include "wx/dialog.h"
	32	#include "wx/msgdlg.h"
	33	#include "wx/file.h"
	34	#include "wx/filename.h"
	35	#include "wx/module.h"
	36	#include "wx/image.h"
	37	#include "wx/thread.h"
	38
	39	#ifdef __WXGPE__
	40	#include <gpe/init.h>
	41	#endif
	42
	43	#ifdef __WXUNIVERSAL__
	44	#include "wx/univ/theme.h"
	45	#include "wx/univ/renderer.h"
	46	#endif
	47
	48	#if wxUSE_THREADS
	49	#include "wx/thread.h"
	50	#endif
	51
	52	#include <unistd.h>
	53
	54	#ifdef HAVE_POLL
	55	#if defined(__VMS)
	56	#include <poll.h>
	57	#else
	58	// bug in the OpenBSD headers: at least in 3.1 there is no extern "C"
	59	// in neither poll.h nor sys/poll.h which results in link errors later
	60	#ifdef __OPENBSD__
	61	extern "C"
	62	{
	63	#endif
	64
	65	#include <sys/poll.h>
	66
	67	#ifdef __OPENBSD__
	68	};
	69	#endif
	70	#endif // platform
	71	#else // !HAVE_POLL
	72	// we implement poll() ourselves using select() which is supposed exist in
	73	// all modern Unices
	74	#include <sys/types.h>
	75	#include <sys/time.h>
	76	#include <unistd.h>
	77	#endif // HAVE_POLL/!HAVE_POLL
	78
	79	#include "wx/gtk/win_gtk.h"
	80
	81	#include <gtk/gtk.h>
	82
	83
	84	//-----------------------------------------------------------------------------
	85	// global data
	86	//-----------------------------------------------------------------------------
	87
	88	bool g_mainThreadLocked = FALSE;
	89	gint g_pendingTag = 0;
	90
	91	static GtkWidget gs_RootWindow = (GtkWidget) NULL;
	92
	93	//-----------------------------------------------------------------------------
	94	// idle system
	95	//-----------------------------------------------------------------------------
	96
	97	extern bool g_isIdle;
	98
	99	void wxapp_install_idle_handler();
	100
	101	#if wxUSE_THREADS
	102	static wxMutex gs_idleTagsMutex;
	103	#endif
	104
	105	//-----------------------------------------------------------------------------
	106	// wxYield
	107	//-----------------------------------------------------------------------------
	108
	109	// not static because used by textctrl.cpp
	110	//
	111	// MT-FIXME
	112	bool wxIsInsideYield = FALSE;
	113
	114	bool wxApp::Yield(bool onlyIfNeeded)
	115	{
	116	if ( wxIsInsideYield )
	117	{
	118	if ( !onlyIfNeeded )
	119	{
	120	wxFAIL_MSG( wxT("wxYield called recursively" ) );
	121	}
	122
	123	return FALSE;
	124	}
	125
	126	#if wxUSE_THREADS
	127	if ( !wxThread::IsMain() )
	128	{
	129	// can't call gtk_main_iteration() from other threads like this
	130	return TRUE;
	131	}
	132	#endif // wxUSE_THREADS
	133
	134	wxIsInsideYield = TRUE;
	135
	136	// We need to remove idle callbacks or the loop will
	137	// never finish.
	138	wxTheApp->RemoveIdleTag();
	139
	140	// disable log flushing from here because a call to wxYield() shouldn't
	141	// normally result in message boxes popping up &c
	142	wxLog::Suspend();
	143
	144	while (gtk_events_pending())
	145	gtk_main_iteration();
	146
	147	// It's necessary to call ProcessIdle() to update the frames sizes which
	148	// might have been changed (it also will update other things set from
	149	// OnUpdateUI() which is a nice (and desired) side effect). But we
	150	// call ProcessIdle() only once since this is not meant for longish
	151	// background jobs (controlled by wxIdleEvent::RequestMore() and the
	152	// return value of Processidle().
	153	ProcessIdle();
	154
	155	// let the logs be flashed again
	156	wxLog::Resume();
	157
	158	wxIsInsideYield = FALSE;
	159
	160	return TRUE;
	161	}
	162
	163	//-----------------------------------------------------------------------------
	164	// wxWakeUpIdle
	165	//-----------------------------------------------------------------------------
	166
	167	// RR/KH: The wxMutexGui calls are not needed on GTK2 according to
	168	// the GTK faq, http://www.gtk.org/faq/#AEN500
	169	// The calls to gdk_threads_enter() and leave() are specifically noted
	170	// as not being necessary. The MutexGui calls are still left in for GTK1.
	171	// Eliminating the MutexGui calls fixes the long-standing "random" lockup
	172	// when using wxPostEvent (which calls WakeUpIdle) from a thread.
	173
	174	void wxApp::WakeUpIdle()
	175	{
	176	#ifndef __WXGTK20__
	177	#if wxUSE_THREADS
	178	if (!wxThread::IsMain())
	179	wxMutexGuiEnter();
	180	#endif // wxUSE_THREADS_
	181	#endif // __WXGTK2__
	182
	183	wxapp_install_idle_handler();
	184
	185	#ifndef __WXGTK20__
	186	#if wxUSE_THREADS
	187	if (!wxThread::IsMain())
	188	wxMutexGuiLeave();
	189	#endif // wxUSE_THREADS_
	190	#endif // __WXGTK2__
	191	}
	192
	193	//-----------------------------------------------------------------------------
	194	// local functions
	195	//-----------------------------------------------------------------------------
	196
	197	// the callback functions must be extern "C" to comply with GTK+ declarations
	198	extern "C"
	199	{
	200
	201	static gint wxapp_pending_callback( gpointer WXUNUSED(data) )
	202	{
	203	if (!wxTheApp) return TRUE;
	204
	205	// When getting called from GDK's time-out handler
	206	// we are no longer within GDK's grab on the GUI
	207	// thread so we must lock it here ourselves.
	208	gdk_threads_enter();
	209
	210	// Sent idle event to all who request them.
	211	wxTheApp->ProcessPendingEvents();
	212
	213	{
	214	#if wxUSE_THREADS
	215	wxMutexLocker lock(gs_idleTagsMutex);
	216	#endif
	217	g_pendingTag = 0;
	218	}
	219
	220	// Flush the logged messages if any.
	221	#if wxUSE_LOG
	222	wxLog::FlushActive();
	223	#endif // wxUSE_LOG
	224
	225	// Release lock again
	226	gdk_threads_leave();
	227
	228	// Return FALSE to indicate that no more idle events are
	229	// to be sent (single shot instead of continuous stream)
	230	return FALSE;
	231	}
	232
	233	static gint wxapp_idle_callback( gpointer WXUNUSED(data) )
	234	{
	235	if (!wxTheApp)
	236	return TRUE;
	237
	238	#ifdef __WXDEBUG__
	239	// don't generate the idle events while the assert modal dialog is shown,
	240	// this completely confuses the apps which don't expect to be reentered
	241	// from some safely-looking functions
	242	if ( wxTheApp->IsInAssert() )
	243	{
	244	// But repaint the assertion message if necessary
	245	if (wxTopLevelWindows.GetCount() > 0)
	246	{
	247	wxWindow* win = (wxWindow*) wxTopLevelWindows.GetLast()->GetData();
	248	#ifdef __WXGTK20__
	249	if (win->IsKindOf(CLASSINFO(wxMessageDialog)))
	250	#else
	251	if (win->IsKindOf(CLASSINFO(wxGenericMessageDialog)))
	252	#endif
	253	win->OnInternalIdle();
	254	}
	255	return TRUE;
	256	}
	257	#endif // __WXDEBUG__
	258
	259	// When getting called from GDK's time-out handler
	260	// we are no longer within GDK's grab on the GUI
	261	// thread so we must lock it here ourselves.
	262	gdk_threads_enter();
	263
	264	// Indicate that we are now in idle mode and event handlers
	265	// will have to reinstall the idle handler again.
	266	{
	267	#if wxUSE_THREADS
	268	wxMutexLocker lock(gs_idleTagsMutex);
	269	#endif
	270	g_isIdle = TRUE;
	271	wxTheApp->m_idleTag = 0;
	272	}
	273
	274	// Send idle event to all who request them as long as
	275	// no events have popped up in the event queue.
	276	while (wxTheApp->ProcessIdle() && (gtk_events_pending() == 0))
	277	;
	278
	279	// Release lock again
	280	gdk_threads_leave();
	281
	282	// Return FALSE to indicate that no more idle events are
	283	// to be sent (single shot instead of continuous stream).
	284	return FALSE;
	285	}
	286
	287	#if wxUSE_THREADS
	288
	289	#ifdef HAVE_POLL
	290	#define wxPoll poll
	291	#define wxPollFd pollfd
	292	#else // !HAVE_POLL
	293
	294	typedef GPollFD wxPollFd;
	295
	296	int wxPoll(wxPollFd *ufds, unsigned int nfds, int timeout)
	297	{
	298	// convert timeout from ms to struct timeval (s/us)
	299	timeval tv_timeout;
	300	tv_timeout.tv_sec = timeout/1000;
	301	tv_timeout.tv_usec = (timeout%1000)*1000;
	302
	303	// remember the highest fd used here
	304	int fdMax = -1;
	305
	306	// and fill the sets for select()
	307	fd_set readfds;
	308	fd_set writefds;
	309	fd_set exceptfds;
	310	FD_ZERO(&readfds);
	311	FD_ZERO(&writefds);
	312	FD_ZERO(&exceptfds);
	313
	314	unsigned int i;
	315	for ( i = 0; i < nfds; i++ )
	316	{
	317	wxASSERT_MSG( ufds[i].fd < FD_SETSIZE, _T("fd out of range") );
	318
	319	if ( ufds[i].events & G_IO_IN )
	320	FD_SET(ufds[i].fd, &readfds);
	321
	322	if ( ufds[i].events & G_IO_PRI )
	323	FD_SET(ufds[i].fd, &exceptfds);
	324
	325	if ( ufds[i].events & G_IO_OUT )
	326	FD_SET(ufds[i].fd, &writefds);
	327
	328	if ( ufds[i].fd > fdMax )
	329	fdMax = ufds[i].fd;
	330	}
	331
	332	fdMax++;
	333	int res = select(fdMax, &readfds, &writefds, &exceptfds, &tv_timeout);
	334
	335	// translate the results back
	336	for ( i = 0; i < nfds; i++ )
	337	{
	338	ufds[i].revents = 0;
	339
	340	if ( FD_ISSET(ufds[i].fd, &readfds ) )
	341	ufds[i].revents \|= G_IO_IN;
	342
	343	if ( FD_ISSET(ufds[i].fd, &exceptfds ) )
	344	ufds[i].revents \|= G_IO_PRI;
	345
	346	if ( FD_ISSET(ufds[i].fd, &writefds ) )
	347	ufds[i].revents \|= G_IO_OUT;
	348	}
	349
	350	return res;
	351	}
	352
	353	#endif // HAVE_POLL/!HAVE_POLL
	354
	355	static gint wxapp_poll_func( GPollFD *ufds, guint nfds, gint timeout )
	356	{
	357	gdk_threads_enter();
	358
	359	wxMutexGuiLeave();
	360	g_mainThreadLocked = TRUE;
	361
	362	// we rely on the fact that glib GPollFD struct is really just pollfd but
	363	// I wonder how wise is this in the long term (VZ)
	364	gint res = wxPoll( (wxPollFd *) ufds, nfds, timeout );
	365
	366	wxMutexGuiEnter();
	367	g_mainThreadLocked = FALSE;
	368
	369	gdk_threads_leave();
	370
	371	return res;
	372	}
	373
	374	#endif // wxUSE_THREADS
	375
	376	} // extern "C"
	377
	378	void wxapp_install_idle_handler()
	379	{
	380	#if wxUSE_THREADS
	381	wxMutexLocker lock(gs_idleTagsMutex);
	382	#endif
	383
	384	// Don't install the handler if it's already installed. This test MUST
	385	// be done when gs_idleTagsMutex is locked!
	386	if (!g_isIdle)
	387	return;
	388
	389	// GD: this assert is raised when using the thread sample (which works)
	390	// so the test is probably not so easy. Can widget callbacks be
	391	// triggered from child threads and, if so, for which widgets?
	392	// wxASSERT_MSG( wxThread::IsMain() \|\| gs_WakeUpIdle, wxT("attempt to install idle handler from widget callback in child thread (should be exclusively from wxWakeUpIdle)") );
	393
	394	wxASSERT_MSG( wxTheApp->m_idleTag == 0, wxT("attempt to install idle handler twice") );
	395
	396	g_isIdle = FALSE;
	397
	398	if (g_pendingTag == 0)
	399	g_pendingTag = gtk_idle_add_priority( 900, wxapp_pending_callback, (gpointer) NULL );
	400
	401	// This routine gets called by all event handlers
	402	// indicating that the idle is over. It may also
	403	// get called from other thread for sending events
	404	// to the main thread (and processing these in
	405	// idle time). Very low priority.
	406	wxTheApp->m_idleTag = gtk_idle_add_priority( 1000, wxapp_idle_callback, (gpointer) NULL );
	407	}
	408
	409	//-----------------------------------------------------------------------------
	410	// Access to the root window global
	411	//-----------------------------------------------------------------------------
	412
	413	GtkWidget* wxGetRootWindow()
	414	{
	415	if (gs_RootWindow == NULL)
	416	{
	417	gs_RootWindow = gtk_window_new( GTK_WINDOW_TOPLEVEL );
	418	gtk_widget_realize( gs_RootWindow );
	419	}
	420	return gs_RootWindow;
	421	}
	422
	423	//-----------------------------------------------------------------------------
	424	// wxApp
	425	//-----------------------------------------------------------------------------
	426
	427	IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)
	428
	429	BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
	430	EVT_IDLE(wxAppBase::OnIdle)
	431	END_EVENT_TABLE()
	432
	433	wxApp::wxApp()
	434	{
	435	#ifdef __WXDEBUG__
	436	m_isInAssert = FALSE;
	437	#endif // __WXDEBUG__
	438
	439	m_idleTag = 0;
	440	g_isIdle = TRUE;
	441	wxapp_install_idle_handler();
	442
	443	#if wxUSE_THREADS
	444	g_main_set_poll_func( wxapp_poll_func );
	445	#endif
	446
	447	m_colorCube = (unsigned char*) NULL;
	448
	449	// this is NULL for a "regular" wxApp, but is set (and freed) by a wxGLApp
	450	m_glVisualInfo = (void *) NULL;
	451	}
	452
	453	wxApp::~wxApp()
	454	{
	455	if (m_idleTag) gtk_idle_remove( m_idleTag );
	456
	457	if (m_colorCube) free(m_colorCube);
	458	}
	459
	460	bool wxApp::OnInitGui()
	461	{
	462	if ( !wxAppBase::OnInitGui() )
	463	return FALSE;
	464
	465	GdkVisual *visual = gdk_visual_get_system();
	466
	467	// if this is a wxGLApp (derived from wxApp), and we've already
	468	// chosen a specific visual, then derive the GdkVisual from that
	469	if (m_glVisualInfo != NULL)
	470	{
	471	#ifdef __WXGTK20__
	472	// seems gtk_widget_set_default_visual no longer exists?
	473	GdkVisual* vis = gtk_widget_get_default_visual();
	474	#else
	475	GdkVisual* vis = gdkx_visual_get(
	476	((XVisualInfo *) m_glVisualInfo) ->visualid );
	477	gtk_widget_set_default_visual( vis );
	478	#endif
	479
	480	GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
	481	gtk_widget_set_default_colormap( colormap );
	482
	483	visual = vis;
	484	}
	485
	486	// On some machines, the default visual is just 256 colours, so
	487	// we make sure we get the best. This can sometimes be wasteful.
	488
	489	else
	490	if ((gdk_visual_get_best() != gdk_visual_get_system()) && (m_useBestVisual))
	491	{
	492	#ifdef __WXGTK20__
	493	/* seems gtk_widget_set_default_visual no longer exists? */
	494	GdkVisual* vis = gtk_widget_get_default_visual();
	495	#else
	496	GdkVisual* vis = gdk_visual_get_best();
	497	gtk_widget_set_default_visual( vis );
	498	#endif
	499
	500	GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
	501	gtk_widget_set_default_colormap( colormap );
	502
	503	visual = vis;
	504	}
	505
	506	// Nothing to do for 15, 16, 24, 32 bit displays
	507	if (visual->depth > 8) return TRUE;
	508
	509	// initialize color cube for 8-bit color reduction dithering
	510
	511	GdkColormap *cmap = gtk_widget_get_default_colormap();
	512
	513	m_colorCube = (unsigned char)malloc(32 32 * 32);
	514
	515	for (int r = 0; r < 32; r++)
	516	{
	517	for (int g = 0; g < 32; g++)
	518	{
	519	for (int b = 0; b < 32; b++)
	520	{
	521	int rr = (r << 3) \| (r >> 2);
	522	int gg = (g << 3) \| (g >> 2);
	523	int bb = (b << 3) \| (b >> 2);
	524
	525	int index = -1;
	526
	527	GdkColor *colors = cmap->colors;
	528	if (colors)
	529	{
	530	int max = 3 * 65536;
	531
	532	for (int i = 0; i < cmap->size; i++)
	533	{
	534	int rdiff = ((rr << 8) - colors[i].red);
	535	int gdiff = ((gg << 8) - colors[i].green);
	536	int bdiff = ((bb << 8) - colors[i].blue);
	537	int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
	538	if (sum < max)
	539	{
	540	index = i; max = sum;
	541	}
	542	}
	543	}
	544	else
	545	{
	546	// assume 8-bit true or static colors. this really exists
	547	GdkVisual* vis = gdk_colormap_get_visual( cmap );
	548	index = (r >> (5 - vis->red_prec)) << vis->red_shift;
	549	index \|= (g >> (5 - vis->green_prec)) << vis->green_shift;
	550	index \|= (b >> (5 - vis->blue_prec)) << vis->blue_shift;
	551	}
	552	m_colorCube[ (r1024) + (g32) + b ] = index;
	553	}
	554	}
	555	}
	556
	557	return TRUE;
	558	}
	559
	560	GdkVisual *wxApp::GetGdkVisual()
	561	{
	562	GdkVisual *visual = NULL;
	563
	564	if (m_glVisualInfo)
	565	visual = gdkx_visual_get( ((XVisualInfo *) m_glVisualInfo)->visualid );
	566	else
	567	visual = gdk_window_get_visual( wxGetRootWindow()->window );
	568
	569	wxASSERT( visual );
	570
	571	return visual;
	572	}
	573
	574	bool wxApp::Initialize(int& argc, wxChar **argv)
	575	{
	576	bool init_result;
	577
	578	#if wxUSE_THREADS
	579	// GTK 1.2 up to version 1.2.3 has broken threads
	580	if ((gtk_major_version == 1) &&
	581	(gtk_minor_version == 2) &&
	582	(gtk_micro_version < 4))
	583	{
	584	printf( "wxWidgets warning: GUI threading disabled due to outdated GTK version\n" );
	585	}
	586	else
	587	{
	588	if (!g_thread_supported())
	589	g_thread_init(NULL);
	590	}
	591	#endif // wxUSE_THREADS
	592
	593	gtk_set_locale();
	594
	595	// We should have the wxUSE_WCHAR_T test on the _outside_
	596	#if wxUSE_WCHAR_T
	597	#if defined(__WXGTK20__)
	598	// gtk+ 2.0 supports Unicode through UTF-8 strings
	599	wxConvCurrent = &wxConvUTF8;
	600	#else // GTK 1.x
	601	if (!wxOKlibc())
	602	wxConvCurrent = &wxConvLocal;
	603	#endif
	604	#else // !wxUSE_WCHAR_T
	605	if (!wxOKlibc())
	606	wxConvCurrent = (wxMBConv*) NULL;
	607	#endif // wxUSE_WCHAR_T/!wxUSE_WCHAR_T
	608
	609	#if wxUSE_UNICODE
	610	// gtk_init() wants UTF-8, not wchar_t, so convert
	611	int i;
	612	char *argvGTK = new char [argc + 1];
	613	for ( i = 0; i < argc; i++ )
	614	{
	615	argvGTK[i] = wxStrdupA(wxConvUTF8.cWX2MB(argv[i]));
	616	}
	617
	618	argvGTK[argc] = NULL;
	619
	620	int argcGTK = argc;
	621
	622	#ifdef __WXGPE__
	623	init_result = true; // is there a _check() version of this?
	624	gpe_application_init( &argcGTK, &argvGTK );
	625	#else
	626	init_result = gtk_init_check( &argcGTK, &argvGTK );
	627	#endif
	628
	629	if ( argcGTK != argc )
	630	{
	631	// we have to drop the parameters which were consumed by GTK+
	632	for ( i = 0; i < argcGTK; i++ )
	633	{
	634	while ( strcmp(wxConvUTF8.cWX2MB(argv[i]), argvGTK[i]) != 0 )
	635	{
	636	memmove(argv + i, argv + i + 1, argc - i);
	637	}
	638	}
	639
	640	argc = argcGTK;
	641	}
	642	//else: gtk_init() didn't modify our parameters
	643
	644	// free our copy
	645	for ( i = 0; i < argcGTK; i++ )
	646	{
	647	free(argvGTK[i]);
	648	}
	649
	650	delete [] argvGTK;
	651	#else // !wxUSE_UNICODE
	652	// gtk_init() shouldn't actually change argv itself (just its contents) so
	653	// it's ok to pass pointer to it
	654	init_result = gtk_init_check( &argc, &argv );
	655	#endif // wxUSE_UNICODE/!wxUSE_UNICODE
	656
	657	if (!init_result) {
	658	wxLogError(wxT("Unable to initialize gtk, is DISPLAY set properly?"));
	659	return false;
	660	}
	661
	662	// we can not enter threads before gtk_init is done
	663	gdk_threads_enter();
	664
	665	if ( !wxAppBase::Initialize(argc, argv) )
	666	{
	667	gdk_threads_leave();
	668
	669	return false;
	670	}
	671
	672	wxSetDetectableAutoRepeat( TRUE );
	673
	674	#if wxUSE_INTL
	675	wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
	676	#endif
	677
	678	return true;
	679	}
	680
	681	void wxApp::CleanUp()
	682	{
	683	gdk_threads_leave();
	684
	685	wxAppBase::CleanUp();
	686	}
	687
	688	#ifdef __WXDEBUG__
	689
	690	void wxApp::OnAssert(const wxChar file, int line, const wxChar cond, const wxChar *msg)
	691	{
	692	m_isInAssert = TRUE;
	693
	694	wxAppBase::OnAssert(file, line, cond, msg);
	695
	696	m_isInAssert = FALSE;
	697	}
	698
	699	#endif // __WXDEBUG__
	700
	701	void wxApp::RemoveIdleTag()
	702	{
	703	#if wxUSE_THREADS
	704	wxMutexLocker lock(gs_idleTagsMutex);
	705	#endif
	706	if (!g_isIdle)
	707	{
	708	gtk_idle_remove( wxTheApp->m_idleTag );
	709	wxTheApp->m_idleTag = 0;
	710	g_isIdle = TRUE;
	711	}
	712	}