8059fb2713
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@44655 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
565 lines
15 KiB
C++
565 lines
15 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: src/gtk/app.cpp
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// Purpose:
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// Author: Robert Roebling
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// Id: $Id$
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// Copyright: (c) 1998 Robert Roebling, Julian Smart
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifdef __VMS
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// vms_jackets.h should for proper working be included before anything else
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# include <vms_jackets.h>
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#undef ConnectionNumber
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#endif
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// For compilers that support precompilation, includes "wx.h".
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#include "wx/wxprec.h"
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#include "wx/app.h"
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#ifndef WX_PRECOMP
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#include "wx/intl.h"
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#include "wx/log.h"
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#include "wx/utils.h"
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#include "wx/memory.h"
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#include "wx/font.h"
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#endif
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#include "wx/thread.h"
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#ifdef __WXGPE__
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#include <gpe/init.h>
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#endif
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#include "wx/gtk/win_gtk.h"
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#include "wx/gtk/private.h"
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#include <gdk/gdkx.h>
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//-----------------------------------------------------------------------------
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// link GnomeVFS
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//-----------------------------------------------------------------------------
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#if wxUSE_MIMETYPE && wxUSE_LIBGNOMEVFS
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#include "wx/link.h"
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wxFORCE_LINK_MODULE(gnome_vfs)
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#endif
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//-----------------------------------------------------------------------------
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// global data
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//-----------------------------------------------------------------------------
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bool g_mainThreadLocked = false;
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static GtkWidget *gs_RootWindow = (GtkWidget*) NULL;
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//-----------------------------------------------------------------------------
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// idle system
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//-----------------------------------------------------------------------------
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void wxapp_install_idle_handler();
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#if wxUSE_THREADS
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static wxMutex gs_idleTagsMutex;
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#endif
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//-----------------------------------------------------------------------------
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// wxYield
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//-----------------------------------------------------------------------------
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// not static because used by textctrl.cpp
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//
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// MT-FIXME
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bool wxIsInsideYield = false;
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bool wxApp::Yield(bool onlyIfNeeded)
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{
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if ( wxIsInsideYield )
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{
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if ( !onlyIfNeeded )
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{
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wxFAIL_MSG( wxT("wxYield called recursively" ) );
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}
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return false;
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}
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#if wxUSE_THREADS
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if ( !wxThread::IsMain() )
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{
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// can't call gtk_main_iteration() from other threads like this
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return true;
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}
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#endif // wxUSE_THREADS
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wxIsInsideYield = true;
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// We need to remove idle callbacks or the loop will
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// never finish.
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SuspendIdleCallback();
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#if wxUSE_LOG
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// disable log flushing from here because a call to wxYield() shouldn't
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// normally result in message boxes popping up &c
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wxLog::Suspend();
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#endif
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while (gtk_events_pending())
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gtk_main_iteration();
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// It's necessary to call ProcessIdle() to update the frames sizes which
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// might have been changed (it also will update other things set from
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// OnUpdateUI() which is a nice (and desired) side effect). But we
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// call ProcessIdle() only once since this is not meant for longish
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// background jobs (controlled by wxIdleEvent::RequestMore() and the
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// return value of Processidle().
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ProcessIdle();
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#if wxUSE_LOG
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// let the logs be flashed again
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wxLog::Resume();
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#endif
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wxIsInsideYield = false;
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return true;
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}
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//-----------------------------------------------------------------------------
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// wxWakeUpIdle
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//-----------------------------------------------------------------------------
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// RR/KH: No wxMutexGui calls are needed here according to the GTK faq,
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// http://www.gtk.org/faq/#AEN500 - this caused problems for wxPostEvent.
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void wxApp::WakeUpIdle()
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{
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wxapp_install_idle_handler();
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}
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//-----------------------------------------------------------------------------
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// local functions
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//-----------------------------------------------------------------------------
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// the callback functions must be extern "C" to comply with GTK+ declarations
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extern "C"
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{
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// One-shot emission hook for "event" signal, to install idle handler.
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// This will be called when the "event" signal is issued on any GtkWidget object.
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static gboolean
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event_emission_hook(GSignalInvocationHint*, guint, const GValue*, gpointer)
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{
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wxapp_install_idle_handler();
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// remove hook
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return false;
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}
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// add emission hook for "event" signal, to re-install idle handler when needed
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static inline void wxAddEmissionHook()
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{
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GType widgetType = GTK_TYPE_WIDGET;
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// if GtkWidget type is loaded
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if (g_type_class_peek(widgetType) != NULL)
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{
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guint sig_id = g_signal_lookup("event", widgetType);
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g_signal_add_emission_hook(sig_id, 0, event_emission_hook, NULL, NULL);
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}
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}
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static gint wxapp_idle_callback( gpointer WXUNUSED(data) )
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{
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// this does not look possible, but just in case...
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if (!wxTheApp)
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return false;
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bool moreIdles = false;
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#ifdef __WXDEBUG__
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// don't generate the idle events while the assert modal dialog is shown,
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// this matches the behavior of wxMSW
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if (!wxTheApp->IsInAssert())
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#endif // __WXDEBUG__
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{
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guint idleID_save;
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{
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// Allow another idle source to be added while this one is busy.
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// Needed if an idle event handler runs a new event loop,
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// for example by showing a dialog.
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#if wxUSE_THREADS
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wxMutexLocker lock(gs_idleTagsMutex);
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#endif
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idleID_save = wxTheApp->m_idleTag;
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wxTheApp->m_idleTag = 0;
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g_isIdle = true;
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wxAddEmissionHook();
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}
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// When getting called from GDK's time-out handler
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// we are no longer within GDK's grab on the GUI
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// thread so we must lock it here ourselves.
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gdk_threads_enter();
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// Send idle event to all who request them as long as
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// no events have popped up in the event queue.
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do {
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moreIdles = wxTheApp->ProcessIdle();
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} while (moreIdles && gtk_events_pending() == 0);
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// Release lock again
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gdk_threads_leave();
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{
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// If another idle source was added, remove it
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#if wxUSE_THREADS
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wxMutexLocker lock(gs_idleTagsMutex);
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#endif
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if (wxTheApp->m_idleTag != 0)
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g_source_remove(wxTheApp->m_idleTag);
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wxTheApp->m_idleTag = idleID_save;
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g_isIdle = false;
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}
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}
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if (!moreIdles)
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{
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#if wxUSE_THREADS
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wxMutexLocker lock(gs_idleTagsMutex);
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#endif
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// Indicate that we are now in idle mode and event handlers
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// will have to reinstall the idle handler again.
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g_isIdle = true;
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wxTheApp->m_idleTag = 0;
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wxAddEmissionHook();
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}
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// Return FALSE if no more idle events are to be sent
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return moreIdles;
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}
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} // extern "C"
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#if wxUSE_THREADS
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static GPollFunc wxgs_poll_func;
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extern "C" {
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static gint wxapp_poll_func( GPollFD *ufds, guint nfds, gint timeout )
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{
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gdk_threads_enter();
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wxMutexGuiLeave();
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g_mainThreadLocked = true;
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gint res = (*wxgs_poll_func)(ufds, nfds, timeout);
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wxMutexGuiEnter();
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g_mainThreadLocked = false;
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gdk_threads_leave();
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return res;
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}
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}
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#endif // wxUSE_THREADS
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void wxapp_install_idle_handler()
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{
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if (wxTheApp == NULL)
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return;
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#if wxUSE_THREADS
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wxMutexLocker lock(gs_idleTagsMutex);
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#endif
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// Don't install the handler if it's already installed. This test *MUST*
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// be done when gs_idleTagsMutex is locked!
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if (!g_isIdle)
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return;
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// GD: this assert is raised when using the thread sample (which works)
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// so the test is probably not so easy. Can widget callbacks be
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// triggered from child threads and, if so, for which widgets?
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// wxASSERT_MSG( wxThread::IsMain() || gs_WakeUpIdle, wxT("attempt to install idle handler from widget callback in child thread (should be exclusively from wxWakeUpIdle)") );
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wxASSERT_MSG( wxTheApp->m_idleTag == 0, wxT("attempt to install idle handler twice") );
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g_isIdle = false;
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// This routine gets called by all event handlers
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// indicating that the idle is over. It may also
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// get called from other thread for sending events
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// to the main thread (and processing these in
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// idle time). Very low priority.
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wxTheApp->m_idleTag = g_idle_add_full(G_PRIORITY_LOW, wxapp_idle_callback, NULL, NULL);
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}
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//-----------------------------------------------------------------------------
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// Access to the root window global
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//-----------------------------------------------------------------------------
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GtkWidget* wxGetRootWindow()
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{
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if (gs_RootWindow == NULL)
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{
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gs_RootWindow = gtk_window_new( GTK_WINDOW_TOPLEVEL );
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gtk_widget_realize( gs_RootWindow );
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}
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return gs_RootWindow;
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}
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//-----------------------------------------------------------------------------
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// wxApp
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//-----------------------------------------------------------------------------
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IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)
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BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
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EVT_IDLE(wxAppBase::OnIdle)
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END_EVENT_TABLE()
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wxApp::wxApp()
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{
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#ifdef __WXDEBUG__
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m_isInAssert = false;
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#endif // __WXDEBUG__
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m_idleTag = 0;
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g_isIdle = true;
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wxapp_install_idle_handler();
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// this is NULL for a "regular" wxApp, but is set (and freed) by a wxGLApp
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m_glVisualInfo = (void *) NULL;
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m_glFBCInfo = (void *) NULL;
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}
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wxApp::~wxApp()
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{
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if (m_idleTag)
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g_source_remove( m_idleTag );
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}
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bool wxApp::OnInitGui()
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{
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if ( !wxAppBase::OnInitGui() )
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return false;
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// if this is a wxGLApp (derived from wxApp), and we've already
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// chosen a specific visual, then derive the GdkVisual from that
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if (m_glVisualInfo != NULL)
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{
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GdkVisual* vis = gtk_widget_get_default_visual();
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GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
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gtk_widget_set_default_colormap( colormap );
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}
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else
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{
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// On some machines, the default visual is just 256 colours, so
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// we make sure we get the best. This can sometimes be wasteful.
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if (m_useBestVisual)
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{
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if (m_forceTrueColour)
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{
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GdkVisual* visual = gdk_visual_get_best_with_both( 24, GDK_VISUAL_TRUE_COLOR );
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if (!visual)
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{
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wxLogError(wxT("Unable to initialize TrueColor visual."));
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return false;
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}
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GdkColormap *colormap = gdk_colormap_new( visual, FALSE );
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gtk_widget_set_default_colormap( colormap );
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}
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else
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{
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if (gdk_visual_get_best() != gdk_visual_get_system())
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{
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GdkVisual* visual = gdk_visual_get_best();
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GdkColormap *colormap = gdk_colormap_new( visual, FALSE );
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gtk_widget_set_default_colormap( colormap );
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}
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}
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}
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}
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return true;
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}
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GdkVisual *wxApp::GetGdkVisual()
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{
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GdkVisual *visual = NULL;
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if (m_glVisualInfo)
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visual = gdkx_visual_get( ((XVisualInfo *) m_glVisualInfo)->visualid );
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else
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visual = gdk_drawable_get_visual( wxGetRootWindow()->window );
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wxASSERT( visual );
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return visual;
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}
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bool wxApp::Initialize(int& argc, wxChar **argv)
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{
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bool init_result;
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#if wxUSE_THREADS
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if (!g_thread_supported())
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g_thread_init(NULL);
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wxgs_poll_func = g_main_context_get_poll_func(NULL);
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g_main_context_set_poll_func(NULL, wxapp_poll_func);
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#endif // wxUSE_THREADS
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gtk_set_locale();
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// We should have the wxUSE_WCHAR_T test on the _outside_
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#if wxUSE_WCHAR_T
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// gtk+ 2.0 supports Unicode through UTF-8 strings
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wxConvCurrent = &wxConvUTF8;
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#else // !wxUSE_WCHAR_T
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if (!wxOKlibc())
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wxConvCurrent = (wxMBConv*) NULL;
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#endif // wxUSE_WCHAR_T/!wxUSE_WCHAR_T
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// decide which conversion to use for the file names
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// (1) this variable exists for the sole purpose of specifying the encoding
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// of the filenames for GTK+ programs, so use it if it is set
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wxString encName(wxGetenv(_T("G_FILENAME_ENCODING")));
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encName = encName.BeforeFirst(_T(','));
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if (encName.CmpNoCase(_T("@locale")) == 0)
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encName.clear();
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encName.MakeUpper();
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#if wxUSE_INTL
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if (encName.empty())
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{
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// (2) if a non default locale is set, assume that the user wants his
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// filenames in this locale too
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encName = wxLocale::GetSystemEncodingName().Upper();
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// (3) finally use UTF-8 by default
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if (encName.empty() || encName == _T("US-ASCII"))
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encName = _T("UTF-8");
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wxSetEnv(_T("G_FILENAME_ENCODING"), encName);
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}
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#else
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if (encName.empty())
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encName = _T("UTF-8");
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#endif // wxUSE_INTL
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static wxConvBrokenFileNames fileconv(encName);
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wxConvFileName = &fileconv;
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#if wxUSE_UNICODE
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// gtk_init() wants UTF-8, not wchar_t, so convert
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int i;
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char **argvGTK = new char *[argc + 1];
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for ( i = 0; i < argc; i++ )
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{
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argvGTK[i] = wxStrdupA(wxConvUTF8.cWX2MB(argv[i]));
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}
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argvGTK[argc] = NULL;
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int argcGTK = argc;
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#ifdef __WXGPE__
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init_result = true; // is there a _check() version of this?
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gpe_application_init( &argcGTK, &argvGTK );
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#else
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init_result = gtk_init_check( &argcGTK, &argvGTK );
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#endif
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if ( argcGTK != argc )
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{
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// we have to drop the parameters which were consumed by GTK+
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for ( i = 0; i < argcGTK; i++ )
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{
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while ( strcmp(wxConvUTF8.cWX2MB(argv[i]), argvGTK[i]) != 0 )
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{
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memmove(argv + i, argv + i + 1, (argc - i)*sizeof(*argv));
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}
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}
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argc = argcGTK;
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}
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//else: gtk_init() didn't modify our parameters
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// free our copy
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for ( i = 0; i < argcGTK; i++ )
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{
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free(argvGTK[i]);
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}
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delete [] argvGTK;
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#else // !wxUSE_UNICODE
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// gtk_init() shouldn't actually change argv itself (just its contents) so
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// it's ok to pass pointer to it
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init_result = gtk_init_check( &argc, &argv );
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#endif // wxUSE_UNICODE/!wxUSE_UNICODE
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if (!init_result) {
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wxLogError(wxT("Unable to initialize gtk, is DISPLAY set properly?"));
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return false;
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}
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// we can not enter threads before gtk_init is done
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gdk_threads_enter();
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if ( !wxAppBase::Initialize(argc, argv) )
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{
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gdk_threads_leave();
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return false;
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}
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wxSetDetectableAutoRepeat( true );
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#if wxUSE_INTL
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wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
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#endif
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return true;
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}
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void wxApp::CleanUp()
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{
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gdk_threads_leave();
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wxAppBase::CleanUp();
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}
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#ifdef __WXDEBUG__
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void wxApp::OnAssertFailure(const wxChar *file,
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int line,
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const wxChar* func,
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const wxChar* cond,
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const wxChar *msg)
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{
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// block wx idle events while assert dialog is showing
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m_isInAssert = true;
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wxAppBase::OnAssertFailure(file, line, func, cond, msg);
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m_isInAssert = false;
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}
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#endif // __WXDEBUG__
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void wxApp::SuspendIdleCallback()
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{
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#if wxUSE_THREADS
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wxMutexLocker lock(gs_idleTagsMutex);
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#endif
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if (m_idleTag != 0)
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{
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g_source_remove(m_idleTag);
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m_idleTag = 0;
|
|
g_isIdle = true;
|
|
wxAddEmissionHook();
|
|
}
|
|
}
|