src/gtk1/app.cpp

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

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

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

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

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

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

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

#include <unistd.h>

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

        #include <sys/poll.h>

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

#include "wx/unix/private.h"
#include "wx/gtk1/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();

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

    while (gtk_events_pending())
        gtk_main_iteration();

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

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

    wxIsInsideYield = FALSE;

    return TRUE;
}

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

// RR/KH: 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()
{
#if wxUSE_THREADS
    if (!wxThread::IsMain())
        wxMutexGuiEnter();
#endif // wxUSE_THREADS_

    wxapp_install_idle_handler();

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

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

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

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

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

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

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

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

    // Release lock again
    gdk_threads_leave();

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

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

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

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

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

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

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

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

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

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

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

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

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

    return res;
}

#endif // HAVE_POLL/!HAVE_POLL

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

    wxMutexGuiLeave();
    g_mainThreadLocked = TRUE;

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

    wxMutexGuiEnter();
    g_mainThreadLocked = FALSE;

    gdk_threads_leave();

    return res;
}

#endif // wxUSE_THREADS

} // extern "C"

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

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

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

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

    g_isIdle = FALSE;

    if (g_pendingTag == 0)
        g_pendingTag = 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;
    m_glFBCInfo = (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)
    {
        GdkVisual* vis = gdkx_visual_get(
            ((XVisualInfo *) m_glVisualInfo) ->visualid );
        gtk_widget_set_default_visual( vis );

        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))
    {
        GdkVisual* vis = gdk_visual_get_best();
        gtk_widget_set_default_visual( vis );

        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 (!wxOKlibc())
            wxConvCurrent = &wxConvLocal;
#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	#ifdef __VMS
	11	// vms_jackets.h should for proper working be included before anything else
	12	# include <vms_jackets.h>
	13	#undef ConnectionNumber
	14	#endif
	15
	16	// For compilers that support precompilation, includes "wx.h".
	17	#include "wx/wxprec.h"
	18
	19	#include "wx/app.h"
	20	#include "wx/gdicmn.h"
	21	#include "wx/utils.h"
	22	#include "wx/intl.h"
	23	#include "wx/log.h"
	24	#include "wx/memory.h"
	25	#include "wx/font.h"
	26	#include "wx/settings.h"
	27	#include "wx/dialog.h"
	28	#include "wx/msgdlg.h"
	29	#include "wx/file.h"
	30	#include "wx/filename.h"
	31	#include "wx/module.h"
	32	#include "wx/image.h"
	33	#include "wx/thread.h"
	34
	35	#ifdef __WXGPE__
	36	#include <gpe/init.h>
	37	#endif
	38
	39	#ifdef __WXUNIVERSAL__
	40	#include "wx/univ/theme.h"
	41	#include "wx/univ/renderer.h"
	42	#endif
	43
	44	#if wxUSE_THREADS
	45	#include "wx/thread.h"
	46	#endif
	47
	48	#include <unistd.h>
	49
	50	#ifdef HAVE_POLL
	51	#if defined(__VMS)
	52	#include <poll.h>
	53	#else
	54	// bug in the OpenBSD headers: at least in 3.1 there is no extern "C"
	55	// in neither poll.h nor sys/poll.h which results in link errors later
	56	#ifdef __OPENBSD__
	57	extern "C"
	58	{
	59	#endif
	60
	61	#include <sys/poll.h>
	62
	63	#ifdef __OPENBSD__
	64	};
	65	#endif
	66	#endif // platform
	67	#else // !HAVE_POLL
	68	// we implement poll() ourselves using select() which is supposed exist in
	69	// all modern Unices
	70	#include <sys/types.h>
	71	#include <sys/time.h>
	72	#include <unistd.h>
	73	#endif // HAVE_POLL/!HAVE_POLL
	74
	75	#include "wx/unix/private.h"
	76	#include "wx/gtk1/win_gtk.h"
	77
	78	#include <gtk/gtk.h>
	79
	80	//-----------------------------------------------------------------------------
	81	// global data
	82	//-----------------------------------------------------------------------------
	83
	84	bool g_mainThreadLocked = FALSE;
	85	gint g_pendingTag = 0;
	86
	87	static GtkWidget gs_RootWindow = (GtkWidget) NULL;
	88
	89	//-----------------------------------------------------------------------------
	90	// idle system
	91	//-----------------------------------------------------------------------------
	92
	93	extern bool g_isIdle;
	94
	95	void wxapp_install_idle_handler();
	96
	97	#if wxUSE_THREADS
	98	static wxMutex gs_idleTagsMutex;
	99	#endif
	100
	101	//-----------------------------------------------------------------------------
	102	// wxYield
	103	//-----------------------------------------------------------------------------
	104
	105	// not static because used by textctrl.cpp
	106	//
	107	// MT-FIXME
	108	bool wxIsInsideYield = FALSE;
	109
	110	bool wxApp::Yield(bool onlyIfNeeded)
	111	{
	112	if ( wxIsInsideYield )
	113	{
	114	if ( !onlyIfNeeded )
	115	{
	116	wxFAIL_MSG( wxT("wxYield called recursively" ) );
	117	}
	118
	119	return FALSE;
	120	}
	121
	122	#if wxUSE_THREADS
	123	if ( !wxThread::IsMain() )
	124	{
	125	// can't call gtk_main_iteration() from other threads like this
	126	return TRUE;
	127	}
	128	#endif // wxUSE_THREADS
	129
	130	wxIsInsideYield = TRUE;
	131
	132	// We need to remove idle callbacks or the loop will
	133	// never finish.
	134	wxTheApp->RemoveIdleTag();
	135
	136	#if wxUSE_LOG
	137	// disable log flushing from here because a call to wxYield() shouldn't
	138	// normally result in message boxes popping up &c
	139	wxLog::Suspend();
	140	#endif
	141
	142	while (gtk_events_pending())
	143	gtk_main_iteration();
	144
	145	// It's necessary to call ProcessIdle() to update the frames sizes which
	146	// might have been changed (it also will update other things set from
	147	// OnUpdateUI() which is a nice (and desired) side effect). But we
	148	// call ProcessIdle() only once since this is not meant for longish
	149	// background jobs (controlled by wxIdleEvent::RequestMore() and the
	150	// return value of Processidle().
	151	ProcessIdle();
	152
	153	#if wxUSE_LOG
	154	// let the logs be flashed again
	155	wxLog::Resume();
	156	#endif
	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	#if wxUSE_THREADS
	177	if (!wxThread::IsMain())
	178	wxMutexGuiEnter();
	179	#endif // wxUSE_THREADS_
	180
	181	wxapp_install_idle_handler();
	182
	183	#if wxUSE_THREADS
	184	if (!wxThread::IsMain())
	185	wxMutexGuiLeave();
	186	#endif // wxUSE_THREADS_
	187	}
	188
	189	//-----------------------------------------------------------------------------
	190	// local functions
	191	//-----------------------------------------------------------------------------
	192
	193	// the callback functions must be extern "C" to comply with GTK+ declarations
	194	extern "C"
	195	{
	196
	197	static gint wxapp_pending_callback( gpointer WXUNUSED(data) )
	198	{
	199	if (!wxTheApp) return TRUE;
	200
	201	// When getting called from GDK's time-out handler
	202	// we are no longer within GDK's grab on the GUI
	203	// thread so we must lock it here ourselves.
	204	gdk_threads_enter();
	205
	206	// Sent idle event to all who request them.
	207	wxTheApp->ProcessPendingEvents();
	208
	209	{
	210	#if wxUSE_THREADS
	211	wxMutexLocker lock(gs_idleTagsMutex);
	212	#endif
	213	g_pendingTag = 0;
	214	}
	215
	216	// Flush the logged messages if any.
	217	#if wxUSE_LOG
	218	wxLog::FlushActive();
	219	#endif // wxUSE_LOG
	220
	221	// Release lock again
	222	gdk_threads_leave();
	223
	224	// Return FALSE to indicate that no more idle events are
	225	// to be sent (single shot instead of continuous stream)
	226	return FALSE;
	227	}
	228
	229	static gint wxapp_idle_callback( gpointer WXUNUSED(data) )
	230	{
	231	if (!wxTheApp)
	232	return TRUE;
	233
	234	#ifdef __WXDEBUG__
	235	// don't generate the idle events while the assert modal dialog is shown,
	236	// this completely confuses the apps which don't expect to be reentered
	237	// from some safely-looking functions
	238	if ( wxTheApp->IsInAssert() )
	239	{
	240	// But repaint the assertion message if necessary
	241	if (wxTopLevelWindows.GetCount() > 0)
	242	{
	243	wxWindow* win = (wxWindow*) wxTopLevelWindows.GetLast()->GetData();
	244	if (win->IsKindOf(CLASSINFO(wxGenericMessageDialog)))
	245	win->OnInternalIdle();
	246	}
	247	return TRUE;
	248	}
	249	#endif // __WXDEBUG__
	250
	251	// When getting called from GDK's time-out handler
	252	// we are no longer within GDK's grab on the GUI
	253	// thread so we must lock it here ourselves.
	254	gdk_threads_enter();
	255
	256	// Indicate that we are now in idle mode and event handlers
	257	// will have to reinstall the idle handler again.
	258	{
	259	#if wxUSE_THREADS
	260	wxMutexLocker lock(gs_idleTagsMutex);
	261	#endif
	262	g_isIdle = TRUE;
	263	wxTheApp->m_idleTag = 0;
	264	}
	265
	266	// Send idle event to all who request them as long as
	267	// no events have popped up in the event queue.
	268	while (wxTheApp->ProcessIdle() && (gtk_events_pending() == 0))
	269	;
	270
	271	// Release lock again
	272	gdk_threads_leave();
	273
	274	// Return FALSE to indicate that no more idle events are
	275	// to be sent (single shot instead of continuous stream).
	276	return FALSE;
	277	}
	278
	279	#if wxUSE_THREADS
	280
	281	#ifdef HAVE_POLL
	282	#define wxPoll poll
	283	#define wxPollFd pollfd
	284	#else // !HAVE_POLL
	285
	286	typedef GPollFD wxPollFd;
	287
	288	int wxPoll(wxPollFd *ufds, unsigned int nfds, int timeout)
	289	{
	290	// convert timeout from ms to struct timeval (s/us)
	291	timeval tv_timeout;
	292	tv_timeout.tv_sec = timeout/1000;
	293	tv_timeout.tv_usec = (timeout%1000)*1000;
	294
	295	// remember the highest fd used here
	296	int fdMax = -1;
	297
	298	// and fill the sets for select()
	299	fd_set readfds;
	300	fd_set writefds;
	301	fd_set exceptfds;
	302	wxFD_ZERO(&readfds);
	303	wxFD_ZERO(&writefds);
	304	wxFD_ZERO(&exceptfds);
	305
	306	unsigned int i;
	307	for ( i = 0; i < nfds; i++ )
	308	{
	309	wxASSERT_MSG( ufds[i].fd < wxFD_SETSIZE, _T("fd out of range") );
	310
	311	if ( ufds[i].events & G_IO_IN )
	312	wxFD_SET(ufds[i].fd, &readfds);
	313
	314	if ( ufds[i].events & G_IO_PRI )
	315	wxFD_SET(ufds[i].fd, &exceptfds);
	316
	317	if ( ufds[i].events & G_IO_OUT )
	318	wxFD_SET(ufds[i].fd, &writefds);
	319
	320	if ( ufds[i].fd > fdMax )
	321	fdMax = ufds[i].fd;
	322	}
	323
	324	fdMax++;
	325	int res = select(fdMax, &readfds, &writefds, &exceptfds, &tv_timeout);
	326
	327	// translate the results back
	328	for ( i = 0; i < nfds; i++ )
	329	{
	330	ufds[i].revents = 0;
	331
	332	if ( wxFD_ISSET(ufds[i].fd, &readfds ) )
	333	ufds[i].revents \|= G_IO_IN;
	334
	335	if ( wxFD_ISSET(ufds[i].fd, &exceptfds ) )
	336	ufds[i].revents \|= G_IO_PRI;
	337
	338	if ( wxFD_ISSET(ufds[i].fd, &writefds ) )
	339	ufds[i].revents \|= G_IO_OUT;
	340	}
	341
	342	return res;
	343	}
	344
	345	#endif // HAVE_POLL/!HAVE_POLL
	346
	347	static gint wxapp_poll_func( GPollFD *ufds, guint nfds, gint timeout )
	348	{
	349	gdk_threads_enter();
	350
	351	wxMutexGuiLeave();
	352	g_mainThreadLocked = TRUE;
	353
	354	// we rely on the fact that glib GPollFD struct is really just pollfd but
	355	// I wonder how wise is this in the long term (VZ)
	356	gint res = wxPoll( (wxPollFd *) ufds, nfds, timeout );
	357
	358	wxMutexGuiEnter();
	359	g_mainThreadLocked = FALSE;
	360
	361	gdk_threads_leave();
	362
	363	return res;
	364	}
	365
	366	#endif // wxUSE_THREADS
	367
	368	} // extern "C"
	369
	370	void wxapp_install_idle_handler()
	371	{
	372	#if wxUSE_THREADS
	373	wxMutexLocker lock(gs_idleTagsMutex);
	374	#endif
	375
	376	// Don't install the handler if it's already installed. This test MUST
	377	// be done when gs_idleTagsMutex is locked!
	378	if (!g_isIdle)
	379	return;
	380
	381	// GD: this assert is raised when using the thread sample (which works)
	382	// so the test is probably not so easy. Can widget callbacks be
	383	// triggered from child threads and, if so, for which widgets?
	384	// wxASSERT_MSG( wxThread::IsMain() \|\| gs_WakeUpIdle, wxT("attempt to install idle handler from widget callback in child thread (should be exclusively from wxWakeUpIdle)") );
	385
	386	wxASSERT_MSG( wxTheApp->m_idleTag == 0, wxT("attempt to install idle handler twice") );
	387
	388	g_isIdle = FALSE;
	389
	390	if (g_pendingTag == 0)
	391	g_pendingTag = gtk_idle_add_priority( 900, wxapp_pending_callback, (gpointer) NULL );
	392
	393	// This routine gets called by all event handlers
	394	// indicating that the idle is over. It may also
	395	// get called from other thread for sending events
	396	// to the main thread (and processing these in
	397	// idle time). Very low priority.
	398	wxTheApp->m_idleTag = gtk_idle_add_priority( 1000, wxapp_idle_callback, (gpointer) NULL );
	399	}
	400
	401	//-----------------------------------------------------------------------------
	402	// Access to the root window global
	403	//-----------------------------------------------------------------------------
	404
	405	GtkWidget* wxGetRootWindow()
	406	{
	407	if (gs_RootWindow == NULL)
	408	{
	409	gs_RootWindow = gtk_window_new( GTK_WINDOW_TOPLEVEL );
	410	gtk_widget_realize( gs_RootWindow );
	411	}
	412	return gs_RootWindow;
	413	}
	414
	415	//-----------------------------------------------------------------------------
	416	// wxApp
	417	//-----------------------------------------------------------------------------
	418
	419	IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)
	420
	421	BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
	422	EVT_IDLE(wxAppBase::OnIdle)
	423	END_EVENT_TABLE()
	424
	425	wxApp::wxApp()
	426	{
	427	#ifdef __WXDEBUG__
	428	m_isInAssert = FALSE;
	429	#endif // __WXDEBUG__
	430
	431	m_idleTag = 0;
	432	g_isIdle = TRUE;
	433	wxapp_install_idle_handler();
	434
	435	#if wxUSE_THREADS
	436	g_main_set_poll_func( wxapp_poll_func );
	437	#endif
	438
	439	m_colorCube = (unsigned char*) NULL;
	440
	441	// this is NULL for a "regular" wxApp, but is set (and freed) by a wxGLApp
	442	m_glVisualInfo = (void *) NULL;
	443	m_glFBCInfo = (void *) NULL;
	444	}
	445
	446	wxApp::~wxApp()
	447	{
	448	if (m_idleTag) gtk_idle_remove( m_idleTag );
	449
	450	if (m_colorCube) free(m_colorCube);
	451	}
	452
	453	bool wxApp::OnInitGui()
	454	{
	455	if ( !wxAppBase::OnInitGui() )
	456	return FALSE;
	457
	458	GdkVisual *visual = gdk_visual_get_system();
	459
	460	// if this is a wxGLApp (derived from wxApp), and we've already
	461	// chosen a specific visual, then derive the GdkVisual from that
	462	if (m_glVisualInfo != NULL)
	463	{
	464	GdkVisual* vis = gdkx_visual_get(
	465	((XVisualInfo *) m_glVisualInfo) ->visualid );
	466	gtk_widget_set_default_visual( vis );
	467
	468	GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
	469	gtk_widget_set_default_colormap( colormap );
	470
	471	visual = vis;
	472	}
	473
	474	// On some machines, the default visual is just 256 colours, so
	475	// we make sure we get the best. This can sometimes be wasteful.
	476
	477	else
	478	if ((gdk_visual_get_best() != gdk_visual_get_system()) && (m_useBestVisual))
	479	{
	480	GdkVisual* vis = gdk_visual_get_best();
	481	gtk_widget_set_default_visual( vis );
	482
	483	GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
	484	gtk_widget_set_default_colormap( colormap );
	485
	486	visual = vis;
	487	}
	488
	489	// Nothing to do for 15, 16, 24, 32 bit displays
	490	if (visual->depth > 8) return TRUE;
	491
	492	// initialize color cube for 8-bit color reduction dithering
	493
	494	GdkColormap *cmap = gtk_widget_get_default_colormap();
	495
	496	m_colorCube = (unsigned char)malloc(32 32 * 32);
	497
	498	for (int r = 0; r < 32; r++)
	499	{
	500	for (int g = 0; g < 32; g++)
	501	{
	502	for (int b = 0; b < 32; b++)
	503	{
	504	int rr = (r << 3) \| (r >> 2);
	505	int gg = (g << 3) \| (g >> 2);
	506	int bb = (b << 3) \| (b >> 2);
	507
	508	int index = -1;
	509
	510	GdkColor *colors = cmap->colors;
	511	if (colors)
	512	{
	513	int max = 3 * 65536;
	514
	515	for (int i = 0; i < cmap->size; i++)
	516	{
	517	int rdiff = ((rr << 8) - colors[i].red);
	518	int gdiff = ((gg << 8) - colors[i].green);
	519	int bdiff = ((bb << 8) - colors[i].blue);
	520	int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
	521	if (sum < max)
	522	{
	523	index = i; max = sum;
	524	}
	525	}
	526	}
	527	else
	528	{
	529	// assume 8-bit true or static colors. this really exists
	530	GdkVisual* vis = gdk_colormap_get_visual( cmap );
	531	index = (r >> (5 - vis->red_prec)) << vis->red_shift;
	532	index \|= (g >> (5 - vis->green_prec)) << vis->green_shift;
	533	index \|= (b >> (5 - vis->blue_prec)) << vis->blue_shift;
	534	}
	535	m_colorCube[ (r1024) + (g32) + b ] = index;
	536	}
	537	}
	538	}
	539
	540	return TRUE;
	541	}
	542
	543	GdkVisual *wxApp::GetGdkVisual()
	544	{
	545	GdkVisual *visual = NULL;
	546
	547	if (m_glVisualInfo)
	548	visual = gdkx_visual_get( ((XVisualInfo *) m_glVisualInfo)->visualid );
	549	else
	550	visual = gdk_window_get_visual( wxGetRootWindow()->window );
	551
	552	wxASSERT( visual );
	553
	554	return visual;
	555	}
	556
	557	bool wxApp::Initialize(int& argc, wxChar **argv)
	558	{
	559	bool init_result;
	560
	561	#if wxUSE_THREADS
	562	// GTK 1.2 up to version 1.2.3 has broken threads
	563	if ((gtk_major_version == 1) &&
	564	(gtk_minor_version == 2) &&
	565	(gtk_micro_version < 4))
	566	{
	567	printf( "wxWidgets warning: GUI threading disabled due to outdated GTK version\n" );
	568	}
	569	else
	570	{
	571	if (!g_thread_supported())
	572	g_thread_init(NULL);
	573	}
	574	#endif // wxUSE_THREADS
	575
	576	gtk_set_locale();
	577
	578	// We should have the wxUSE_WCHAR_T test on the _outside_
	579	#if wxUSE_WCHAR_T
	580	if (!wxOKlibc())
	581	wxConvCurrent = &wxConvLocal;
	582	#else // !wxUSE_WCHAR_T
	583	if (!wxOKlibc())
	584	wxConvCurrent = (wxMBConv*) NULL;
	585	#endif // wxUSE_WCHAR_T/!wxUSE_WCHAR_T
	586
	587	#if wxUSE_UNICODE
	588	// gtk_init() wants UTF-8, not wchar_t, so convert
	589	int i;
	590	char *argvGTK = new char [argc + 1];
	591	for ( i = 0; i < argc; i++ )
	592	{
	593	argvGTK[i] = wxStrdupA(wxConvUTF8.cWX2MB(argv[i]));
	594	}
	595
	596	argvGTK[argc] = NULL;
	597
	598	int argcGTK = argc;
	599
	600	#ifdef __WXGPE__
	601	init_result = true; // is there a _check() version of this?
	602	gpe_application_init( &argcGTK, &argvGTK );
	603	#else
	604	init_result = gtk_init_check( &argcGTK, &argvGTK );
	605	#endif
	606
	607	if ( argcGTK != argc )
	608	{
	609	// we have to drop the parameters which were consumed by GTK+
	610	for ( i = 0; i < argcGTK; i++ )
	611	{
	612	while ( strcmp(wxConvUTF8.cWX2MB(argv[i]), argvGTK[i]) != 0 )
	613	{
	614	memmove(argv + i, argv + i + 1, argc - i);
	615	}
	616	}
	617
	618	argc = argcGTK;
	619	}
	620	//else: gtk_init() didn't modify our parameters
	621
	622	// free our copy
	623	for ( i = 0; i < argcGTK; i++ )
	624	{
	625	free(argvGTK[i]);
	626	}
	627
	628	delete [] argvGTK;
	629	#else // !wxUSE_UNICODE
	630	// gtk_init() shouldn't actually change argv itself (just its contents) so
	631	// it's ok to pass pointer to it
	632	init_result = gtk_init_check( &argc, &argv );
	633	#endif // wxUSE_UNICODE/!wxUSE_UNICODE
	634
	635	if (!init_result) {
	636	wxLogError(wxT("Unable to initialize gtk, is DISPLAY set properly?"));
	637	return false;
	638	}
	639
	640	// we can not enter threads before gtk_init is done
	641	gdk_threads_enter();
	642
	643	if ( !wxAppBase::Initialize(argc, argv) )
	644	{
	645	gdk_threads_leave();
	646
	647	return false;
	648	}
	649
	650	wxSetDetectableAutoRepeat( TRUE );
	651
	652	#if wxUSE_INTL
	653	wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
	654	#endif
	655
	656	return true;
	657	}
	658
	659	void wxApp::CleanUp()
	660	{
	661	gdk_threads_leave();
	662
	663	wxAppBase::CleanUp();
	664	}
	665
	666	#ifdef __WXDEBUG__
	667
	668	void wxApp::OnAssert(const wxChar file, int line, const wxChar cond, const wxChar *msg)
	669	{
	670	m_isInAssert = TRUE;
	671
	672	wxAppBase::OnAssert(file, line, cond, msg);
	673
	674	m_isInAssert = FALSE;
	675	}
	676
	677	#endif // __WXDEBUG__
	678
	679	void wxApp::RemoveIdleTag()
	680	{
	681	#if wxUSE_THREADS
	682	wxMutexLocker lock(gs_idleTagsMutex);
	683	#endif
	684	if (!g_isIdle)
	685	{
	686	gtk_idle_remove( wxTheApp->m_idleTag );
	687	wxTheApp->m_idleTag = 0;
	688	g_isIdle = TRUE;
	689	}
	690	}