File indexing completed on 2024-05-12 05:34:35

 /*
     this file is part of the oxygen gtk engine
     SPDX-FileCopyrightText: 2010 Hugo Pereira Da Costa <hugo.pereira@free.fr>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #include "oxygenscrollbardata.h"
 #include "../oxygengtkutils.h"
 
 #include <gtk/gtk.h>
 
 namespace Oxygen
 {
 
     //________________________________________________________________________________
     void ScrollBarData::connect( GtkWidget* widget )
     {
         _target = widget;
         _locked = false;
         _valueChangedId.connect( G_OBJECT(widget), "value-changed", G_CALLBACK( valueChanged ), this );
     }
 
     //________________________________________________________________________________
     void ScrollBarData::disconnect( GtkWidget* )
     {
         _target = 0L;
 
         // reset timeout and locked flag
         _timer.stop();
         _locked = false;
 
         _valueChangedId.disconnect();
     }
 
     //________________________________________________________________________________
     void ScrollBarData::valueChanged( GtkRange* widget, gpointer pointer )
     {
 
         ScrollBarData& data( *static_cast<ScrollBarData*>( pointer ) );
         if( data._updatesDelayed )
         {
 
             // schedule delayed timeOut
             if( !data._timer.isRunning() )
             {
 
                 data._timer.start( data._delay, (GSourceFunc)delayedUpdate, &data );
                 data._locked = false;
 
             } else data._locked = true;
 
 
         } else if( GtkWidget* parent = Gtk::gtk_parent_scrolled_window( GTK_WIDGET( widget ) ) ) {
 
             gtk_widget_queue_draw( parent );
 
         }
 
         return;
     }
 
     //________________________________________________________________________________
     gboolean ScrollBarData::delayedUpdate( gpointer pointer )
     {
 
         ScrollBarData& data( *static_cast<ScrollBarData*>(pointer) );
 
         if( !data._target )
         {
 
             // if target is invalid, reset timeout and return
             data._locked = false;
             return FALSE;
 
         } else if( data._locked ) {
 
             // if locked, reset the flag and re-run timer
             data._locked = false;
             return TRUE;
 
         } else if( GtkWidget* parent = Gtk::gtk_parent_scrolled_window( GTK_WIDGET( data._target ) ) ) {
 
             // otherwise, trigger update
             gtk_widget_queue_draw( parent );
             return FALSE;
 
         }
 
         // if everything fails, unlock and do nothing
         data._locked = false;
         return FALSE;
 
     }
 
 }