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>

#if wxUSE_LIBGNOMEPRINT

#include "wx/html/forcelnk.h"
FORCE_LINK(gnome_print)

#endif

//-----------------------------------------------------------------------------
// 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	#if wxUSE_LIBGNOMEPRINT
	84
	85	#include "wx/html/forcelnk.h"
	86	FORCE_LINK(gnome_print)
	87
	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	extern bool g_isIdle;
	104
	105	void wxapp_install_idle_handler();
	106
	107	#if wxUSE_THREADS
	108	static wxMutex gs_idleTagsMutex;
	109	#endif
	110
	111	//-----------------------------------------------------------------------------
	112	// wxYield
	113	//-----------------------------------------------------------------------------
	114
	115	// not static because used by textctrl.cpp
	116	//
	117	// MT-FIXME
	118	bool wxIsInsideYield = FALSE;
	119
	120	bool wxApp::Yield(bool onlyIfNeeded)
	121	{
	122	if ( wxIsInsideYield )
	123	{
	124	if ( !onlyIfNeeded )
	125	{
	126	wxFAIL_MSG( wxT("wxYield called recursively" ) );
	127	}
	128
	129	return FALSE;
	130	}
	131
	132	#if wxUSE_THREADS
	133	if ( !wxThread::IsMain() )
	134	{
	135	// can't call gtk_main_iteration() from other threads like this
	136	return TRUE;
	137	}
	138	#endif // wxUSE_THREADS
	139
	140	wxIsInsideYield = TRUE;
	141
	142	// We need to remove idle callbacks or the loop will
	143	// never finish.
	144	wxTheApp->RemoveIdleTag();
	145
	146	// disable log flushing from here because a call to wxYield() shouldn't
	147	// normally result in message boxes popping up &c
	148	wxLog::Suspend();
	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	// let the logs be flashed again
	162	wxLog::Resume();
	163
	164	wxIsInsideYield = FALSE;
	165
	166	return TRUE;
	167	}
	168
	169	//-----------------------------------------------------------------------------
	170	// wxWakeUpIdle
	171	//-----------------------------------------------------------------------------
	172
	173	// RR/KH: The wxMutexGui calls are not needed on GTK2 according to
	174	// the GTK faq, http://www.gtk.org/faq/#AEN500
	175	// The calls to gdk_threads_enter() and leave() are specifically noted
	176	// as not being necessary. The MutexGui calls are still left in for GTK1.
	177	// Eliminating the MutexGui calls fixes the long-standing "random" lockup
	178	// when using wxPostEvent (which calls WakeUpIdle) from a thread.
	179
	180	void wxApp::WakeUpIdle()
	181	{
	182	#ifndef __WXGTK20__
	183	#if wxUSE_THREADS
	184	if (!wxThread::IsMain())
	185	wxMutexGuiEnter();
	186	#endif // wxUSE_THREADS_
	187	#endif // __WXGTK2__
	188
	189	wxapp_install_idle_handler();
	190
	191	#ifndef __WXGTK20__
	192	#if wxUSE_THREADS
	193	if (!wxThread::IsMain())
	194	wxMutexGuiLeave();
	195	#endif // wxUSE_THREADS_
	196	#endif // __WXGTK2__
	197	}
	198
	199	//-----------------------------------------------------------------------------
	200	// local functions
	201	//-----------------------------------------------------------------------------
	202
	203	// the callback functions must be extern "C" to comply with GTK+ declarations
	204	extern "C"
	205	{
	206
	207	static gint wxapp_pending_callback( gpointer WXUNUSED(data) )
	208	{
	209	if (!wxTheApp) return TRUE;
	210
	211	// When getting called from GDK's time-out handler
	212	// we are no longer within GDK's grab on the GUI
	213	// thread so we must lock it here ourselves.
	214	gdk_threads_enter();
	215
	216	// Sent idle event to all who request them.
	217	wxTheApp->ProcessPendingEvents();
	218
	219	{
	220	#if wxUSE_THREADS
	221	wxMutexLocker lock(gs_idleTagsMutex);
	222	#endif
	223	g_pendingTag = 0;
	224	}
	225
	226	// Flush the logged messages if any.
	227	#if wxUSE_LOG
	228	wxLog::FlushActive();
	229	#endif // wxUSE_LOG
	230
	231	// Release lock again
	232	gdk_threads_leave();
	233
	234	// Return FALSE to indicate that no more idle events are
	235	// to be sent (single shot instead of continuous stream)
	236	return FALSE;
	237	}
	238
	239	static gint wxapp_idle_callback( gpointer WXUNUSED(data) )
	240	{
	241	if (!wxTheApp)
	242	return TRUE;
	243
	244	#ifdef __WXDEBUG__
	245	// don't generate the idle events while the assert modal dialog is shown,
	246	// this completely confuses the apps which don't expect to be reentered
	247	// from some safely-looking functions
	248	if ( wxTheApp->IsInAssert() )
	249	{
	250	// But repaint the assertion message if necessary
	251	if (wxTopLevelWindows.GetCount() > 0)
	252	{
	253	wxWindow* win = (wxWindow*) wxTopLevelWindows.GetLast()->GetData();
	254	#ifdef __WXGTK20__
	255	if (win->IsKindOf(CLASSINFO(wxMessageDialog)))
	256	#else
	257	if (win->IsKindOf(CLASSINFO(wxGenericMessageDialog)))
	258	#endif
	259	win->OnInternalIdle();
	260	}
	261	return TRUE;
	262	}
	263	#endif // __WXDEBUG__
	264
	265	// When getting called from GDK's time-out handler
	266	// we are no longer within GDK's grab on the GUI
	267	// thread so we must lock it here ourselves.
	268	gdk_threads_enter();
	269
	270	// Indicate that we are now in idle mode and event handlers
	271	// will have to reinstall the idle handler again.
	272	{
	273	#if wxUSE_THREADS
	274	wxMutexLocker lock(gs_idleTagsMutex);
	275	#endif
	276	g_isIdle = TRUE;
	277	wxTheApp->m_idleTag = 0;
	278	}
	279
	280	// Send idle event to all who request them as long as
	281	// no events have popped up in the event queue.
	282	while (wxTheApp->ProcessIdle() && (gtk_events_pending() == 0))
	283	;
	284
	285	// Release lock again
	286	gdk_threads_leave();
	287
	288	// Return FALSE to indicate that no more idle events are
	289	// to be sent (single shot instead of continuous stream).
	290	return FALSE;
	291	}
	292
	293	#if wxUSE_THREADS
	294
	295	#ifdef HAVE_POLL
	296	#define wxPoll poll
	297	#define wxPollFd pollfd
	298	#else // !HAVE_POLL
	299
	300	typedef GPollFD wxPollFd;
	301
	302	int wxPoll(wxPollFd *ufds, unsigned int nfds, int timeout)
	303	{
	304	// convert timeout from ms to struct timeval (s/us)
	305	timeval tv_timeout;
	306	tv_timeout.tv_sec = timeout/1000;
	307	tv_timeout.tv_usec = (timeout%1000)*1000;
	308
	309	// remember the highest fd used here
	310	int fdMax = -1;
	311
	312	// and fill the sets for select()
	313	fd_set readfds;
	314	fd_set writefds;
	315	fd_set exceptfds;
	316	FD_ZERO(&readfds);
	317	FD_ZERO(&writefds);
	318	FD_ZERO(&exceptfds);
	319
	320	unsigned int i;
	321	for ( i = 0; i < nfds; i++ )
	322	{
	323	wxASSERT_MSG( ufds[i].fd < FD_SETSIZE, _T("fd out of range") );
	324
	325	if ( ufds[i].events & G_IO_IN )
	326	FD_SET(ufds[i].fd, &readfds);
	327
	328	if ( ufds[i].events & G_IO_PRI )
	329	FD_SET(ufds[i].fd, &exceptfds);
	330
	331	if ( ufds[i].events & G_IO_OUT )
	332	FD_SET(ufds[i].fd, &writefds);
	333
	334	if ( ufds[i].fd > fdMax )
	335	fdMax = ufds[i].fd;
	336	}
	337
	338	fdMax++;
	339	int res = select(fdMax, &readfds, &writefds, &exceptfds, &tv_timeout);
	340
	341	// translate the results back
	342	for ( i = 0; i < nfds; i++ )
	343	{
	344	ufds[i].revents = 0;
	345
	346	if ( FD_ISSET(ufds[i].fd, &readfds ) )
	347	ufds[i].revents \|= G_IO_IN;
	348
	349	if ( FD_ISSET(ufds[i].fd, &exceptfds ) )
	350	ufds[i].revents \|= G_IO_PRI;
	351
	352	if ( FD_ISSET(ufds[i].fd, &writefds ) )
	353	ufds[i].revents \|= G_IO_OUT;
	354	}
	355
	356	return res;
	357	}
	358
	359	#endif // HAVE_POLL/!HAVE_POLL
	360
	361	static gint wxapp_poll_func( GPollFD *ufds, guint nfds, gint timeout )
	362	{
	363	gdk_threads_enter();
	364
	365	wxMutexGuiLeave();
	366	g_mainThreadLocked = TRUE;
	367
	368	// we rely on the fact that glib GPollFD struct is really just pollfd but
	369	// I wonder how wise is this in the long term (VZ)
	370	gint res = wxPoll( (wxPollFd *) ufds, nfds, timeout );
	371
	372	wxMutexGuiEnter();
	373	g_mainThreadLocked = FALSE;
	374
	375	gdk_threads_leave();
	376
	377	return res;
	378	}
	379
	380	#endif // wxUSE_THREADS
	381
	382	} // extern "C"
	383
	384	void wxapp_install_idle_handler()
	385	{
	386	#if wxUSE_THREADS
	387	wxMutexLocker lock(gs_idleTagsMutex);
	388	#endif
	389
	390	// Don't install the handler if it's already installed. This test MUST
	391	// be done when gs_idleTagsMutex is locked!
	392	if (!g_isIdle)
	393	return;
	394
	395	// GD: this assert is raised when using the thread sample (which works)
	396	// so the test is probably not so easy. Can widget callbacks be
	397	// triggered from child threads and, if so, for which widgets?
	398	// wxASSERT_MSG( wxThread::IsMain() \|\| gs_WakeUpIdle, wxT("attempt to install idle handler from widget callback in child thread (should be exclusively from wxWakeUpIdle)") );
	399
	400	wxASSERT_MSG( wxTheApp->m_idleTag == 0, wxT("attempt to install idle handler twice") );
	401
	402	g_isIdle = FALSE;
	403
	404	if (g_pendingTag == 0)
	405	g_pendingTag = gtk_idle_add_priority( 900, wxapp_pending_callback, (gpointer) NULL );
	406
	407	// This routine gets called by all event handlers
	408	// indicating that the idle is over. It may also
	409	// get called from other thread for sending events
	410	// to the main thread (and processing these in
	411	// idle time). Very low priority.
	412	wxTheApp->m_idleTag = gtk_idle_add_priority( 1000, wxapp_idle_callback, (gpointer) NULL );
	413	}
	414
	415	//-----------------------------------------------------------------------------
	416	// Access to the root window global
	417	//-----------------------------------------------------------------------------
	418
	419	GtkWidget* wxGetRootWindow()
	420	{
	421	if (gs_RootWindow == NULL)
	422	{
	423	gs_RootWindow = gtk_window_new( GTK_WINDOW_TOPLEVEL );
	424	gtk_widget_realize( gs_RootWindow );
	425	}
	426	return gs_RootWindow;
	427	}
	428
	429	//-----------------------------------------------------------------------------
	430	// wxApp
	431	//-----------------------------------------------------------------------------
	432
	433	IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)
	434
	435	BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
	436	EVT_IDLE(wxAppBase::OnIdle)
	437	END_EVENT_TABLE()
	438
	439	wxApp::wxApp()
	440	{
	441	#ifdef __WXDEBUG__
	442	m_isInAssert = FALSE;
	443	#endif // __WXDEBUG__
	444
	445	m_idleTag = 0;
	446	g_isIdle = TRUE;
	447	wxapp_install_idle_handler();
	448
	449	#if wxUSE_THREADS
	450	g_main_set_poll_func( wxapp_poll_func );
	451	#endif
	452
	453	m_colorCube = (unsigned char*) NULL;
	454
	455	// this is NULL for a "regular" wxApp, but is set (and freed) by a wxGLApp
	456	m_glVisualInfo = (void *) NULL;
	457	}
	458
	459	wxApp::~wxApp()
	460	{
	461	if (m_idleTag) gtk_idle_remove( m_idleTag );
	462
	463	if (m_colorCube) free(m_colorCube);
	464	}
	465
	466	bool wxApp::OnInitGui()
	467	{
	468	if ( !wxAppBase::OnInitGui() )
	469	return FALSE;
	470
	471	GdkVisual *visual = gdk_visual_get_system();
	472
	473	// if this is a wxGLApp (derived from wxApp), and we've already
	474	// chosen a specific visual, then derive the GdkVisual from that
	475	if (m_glVisualInfo != NULL)
	476	{
	477	#ifdef __WXGTK20__
	478	// seems gtk_widget_set_default_visual no longer exists?
	479	GdkVisual* vis = gtk_widget_get_default_visual();
	480	#else
	481	GdkVisual* vis = gdkx_visual_get(
	482	((XVisualInfo *) m_glVisualInfo) ->visualid );
	483	gtk_widget_set_default_visual( vis );
	484	#endif
	485
	486	GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
	487	gtk_widget_set_default_colormap( colormap );
	488
	489	visual = vis;
	490	}
	491
	492	// On some machines, the default visual is just 256 colours, so
	493	// we make sure we get the best. This can sometimes be wasteful.
	494
	495	else
	496	if ((gdk_visual_get_best() != gdk_visual_get_system()) && (m_useBestVisual))
	497	{
	498	#ifdef __WXGTK20__
	499	/* seems gtk_widget_set_default_visual no longer exists? */
	500	GdkVisual* vis = gtk_widget_get_default_visual();
	501	#else
	502	GdkVisual* vis = gdk_visual_get_best();
	503	gtk_widget_set_default_visual( vis );
	504	#endif
	505
	506	GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
	507	gtk_widget_set_default_colormap( colormap );
	508
	509	visual = vis;
	510	}
	511
	512	// Nothing to do for 15, 16, 24, 32 bit displays
	513	if (visual->depth > 8) return TRUE;
	514
	515	// initialize color cube for 8-bit color reduction dithering
	516
	517	GdkColormap *cmap = gtk_widget_get_default_colormap();
	518
	519	m_colorCube = (unsigned char)malloc(32 32 * 32);
	520
	521	for (int r = 0; r < 32; r++)
	522	{
	523	for (int g = 0; g < 32; g++)
	524	{
	525	for (int b = 0; b < 32; b++)
	526	{
	527	int rr = (r << 3) \| (r >> 2);
	528	int gg = (g << 3) \| (g >> 2);
	529	int bb = (b << 3) \| (b >> 2);
	530
	531	int index = -1;
	532
	533	GdkColor *colors = cmap->colors;
	534	if (colors)
	535	{
	536	int max = 3 * 65536;
	537
	538	for (int i = 0; i < cmap->size; i++)
	539	{
	540	int rdiff = ((rr << 8) - colors[i].red);
	541	int gdiff = ((gg << 8) - colors[i].green);
	542	int bdiff = ((bb << 8) - colors[i].blue);
	543	int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
	544	if (sum < max)
	545	{
	546	index = i; max = sum;
	547	}
	548	}
	549	}
	550	else
	551	{
	552	// assume 8-bit true or static colors. this really exists
	553	GdkVisual* vis = gdk_colormap_get_visual( cmap );
	554	index = (r >> (5 - vis->red_prec)) << vis->red_shift;
	555	index \|= (g >> (5 - vis->green_prec)) << vis->green_shift;
	556	index \|= (b >> (5 - vis->blue_prec)) << vis->blue_shift;
	557	}
	558	m_colorCube[ (r1024) + (g32) + b ] = index;
	559	}
	560	}
	561	}
	562
	563	return TRUE;
	564	}
	565
	566	GdkVisual *wxApp::GetGdkVisual()
	567	{
	568	GdkVisual *visual = NULL;
	569
	570	if (m_glVisualInfo)
	571	visual = gdkx_visual_get( ((XVisualInfo *) m_glVisualInfo)->visualid );
	572	else
	573	visual = gdk_window_get_visual( wxGetRootWindow()->window );
	574
	575	wxASSERT( visual );
	576
	577	return visual;
	578	}
	579
	580	bool wxApp::Initialize(int& argc, wxChar **argv)
	581	{
	582	bool init_result;
	583
	584	#if wxUSE_THREADS
	585	// GTK 1.2 up to version 1.2.3 has broken threads
	586	if ((gtk_major_version == 1) &&
	587	(gtk_minor_version == 2) &&
	588	(gtk_micro_version < 4))
	589	{
	590	printf( "wxWidgets warning: GUI threading disabled due to outdated GTK version\n" );
	591	}
	592	else
	593	{
	594	if (!g_thread_supported())
	595	g_thread_init(NULL);
	596	}
	597	#endif // wxUSE_THREADS
	598
	599	gtk_set_locale();
	600
	601	// We should have the wxUSE_WCHAR_T test on the _outside_
	602	#if wxUSE_WCHAR_T
	603	#if defined(__WXGTK20__)
	604	// gtk+ 2.0 supports Unicode through UTF-8 strings
	605	wxConvCurrent = &wxConvUTF8;
	606	#else // GTK 1.x
	607	if (!wxOKlibc())
	608	wxConvCurrent = &wxConvLocal;
	609	#endif
	610	#else // !wxUSE_WCHAR_T
	611	if (!wxOKlibc())
	612	wxConvCurrent = (wxMBConv*) NULL;
	613	#endif // wxUSE_WCHAR_T/!wxUSE_WCHAR_T
	614
	615	#if wxUSE_UNICODE
	616	// gtk_init() wants UTF-8, not wchar_t, so convert
	617	int i;
	618	char *argvGTK = new char [argc + 1];
	619	for ( i = 0; i < argc; i++ )
	620	{
	621	argvGTK[i] = wxStrdupA(wxConvUTF8.cWX2MB(argv[i]));
	622	}
	623
	624	argvGTK[argc] = NULL;
	625
	626	int argcGTK = argc;
	627
	628	#ifdef __WXGPE__
	629	init_result = true; // is there a _check() version of this?
	630	gpe_application_init( &argcGTK, &argvGTK );
	631	#else
	632	init_result = gtk_init_check( &argcGTK, &argvGTK );
	633	#endif
	634
	635	if ( argcGTK != argc )
	636	{
	637	// we have to drop the parameters which were consumed by GTK+
	638	for ( i = 0; i < argcGTK; i++ )
	639	{
	640	while ( strcmp(wxConvUTF8.cWX2MB(argv[i]), argvGTK[i]) != 0 )
	641	{
	642	memmove(argv + i, argv + i + 1, argc - i);
	643	}
	644	}
	645
	646	argc = argcGTK;
	647	}
	648	//else: gtk_init() didn't modify our parameters
	649
	650	// free our copy
	651	for ( i = 0; i < argcGTK; i++ )
	652	{
	653	free(argvGTK[i]);
	654	}
	655
	656	delete [] argvGTK;
	657	#else // !wxUSE_UNICODE
	658	// gtk_init() shouldn't actually change argv itself (just its contents) so
	659	// it's ok to pass pointer to it
	660	init_result = gtk_init_check( &argc, &argv );
	661	#endif // wxUSE_UNICODE/!wxUSE_UNICODE
	662
	663	if (!init_result) {
	664	wxLogError(wxT("Unable to initialize gtk, is DISPLAY set properly?"));
	665	return false;
	666	}
	667
	668	// we can not enter threads before gtk_init is done
	669	gdk_threads_enter();
	670
	671	if ( !wxAppBase::Initialize(argc, argv) )
	672	{
	673	gdk_threads_leave();
	674
	675	return false;
	676	}
	677
	678	wxSetDetectableAutoRepeat( TRUE );
	679
	680	#if wxUSE_INTL
	681	wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
	682	#endif
	683
	684	return true;
	685	}
	686
	687	void wxApp::CleanUp()
	688	{
	689	gdk_threads_leave();
	690
	691	wxAppBase::CleanUp();
	692	}
	693
	694	#ifdef __WXDEBUG__
	695
	696	void wxApp::OnAssert(const wxChar file, int line, const wxChar cond, const wxChar *msg)
	697	{
	698	m_isInAssert = TRUE;
	699
	700	wxAppBase::OnAssert(file, line, cond, msg);
	701
	702	m_isInAssert = FALSE;
	703	}
	704
	705	#endif // __WXDEBUG__
	706
	707	void wxApp::RemoveIdleTag()
	708	{
	709	#if wxUSE_THREADS
	710	wxMutexLocker lock(gs_idleTagsMutex);
	711	#endif
	712	if (!g_isIdle)
	713	{
	714	gtk_idle_remove( wxTheApp->m_idleTag );
	715	wxTheApp->m_idleTag = 0;
	716	g_isIdle = TRUE;
	717	}
	718	}