src/gtk/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"

#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();

//-----------------------------------------------------------------------------
// 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;

    if (!g_isIdle)
    {
        // We need to remove idle callbacks or the loop will
        // never finish.
        gtk_idle_remove( m_idleTag );
        m_idleTag = 0;
        g_isIdle = TRUE;
    }

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

void wxApp::WakeUpIdle()
{
#if wxUSE_THREADS
    if (!wxThread::IsMain())
        wxMutexGuiEnter();
#endif

    if (g_isIdle)
        wxapp_install_idle_handler();

#if wxUSE_THREADS
    if (!wxThread::IsMain())
        wxMutexGuiLeave();
#endif
}

//-----------------------------------------------------------------------------
// 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();

    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.
    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()
{
    // 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()
{
    m_initialized = FALSE;
#ifdef __WXDEBUG__
    m_isInAssert = FALSE;
#endif // __WXDEBUG__

    m_idleTag = 0;
    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;
}

int wxApp::MainLoop()
{
    gtk_main();
    return 0;
}

void wxApp::Exit()
{
    // VZ: no idea why is it different from ExitMainLoop() but this is what
    //     wxExit() used to do
    gtk_main_quit();
}

void wxApp::ExitMainLoop()
{
    if (gtk_main_level() > 0)
        gtk_main_quit();
}

bool wxApp::Initialized()
{
    return m_initialized;
}

bool wxApp::Pending()
{
    return (gtk_events_pending() > 0);
}

void wxApp::Dispatch()
{
    gtk_main_iteration();
}

bool wxApp::Initialize(int& argc, wxChar **argv)
{
#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( "wxWindows warning: GUI threading disabled due to outdated GTK version\n" );
    }
    else
    {
        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;
    gtk_init( &argcGTK, &argvGTK );

    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
    gtk_init( &argc, &argv );
#endif // wxUSE_UNICODE/!wxUSE_UNICODE

    // 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

    wxGetRootWindow();

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