File indexing completed on 2024-05-12 05:34:33 

0001 /*
0002     this file is part of the oxygen gtk engine
0003     SPDX-FileCopyrightText: 2010 Hugo Pereira Da Costa <hugo.pereira@free.fr>
0004 
0005     SPDX-License-Identifier: LGPL-2.0-or-later
0006 */
0007 
0008 #include "oxygenfollowmousedata.h"
0009 
0010 namespace Oxygen
0011 {
0012 
0013     //________________________________________________________________________________
0014     void FollowMouseData::startAnimation( const GdkRectangle& startRect, const GdkRectangle& endRect )
0015     {
0016 
0017         // copy end rect
0018         _endRect = endRect;
0019 
0020         // check timeLine status
0021         if( _timeLine.isRunning() &&
0022             _timeLine.value() < 1.0 &&
0023             Gtk::gdk_rectangle_is_valid( &_endRect ) &&
0024             Gtk::gdk_rectangle_is_valid( &_animatedRect ) )
0025         {
0026 
0027             // mark old start rect as part of dirtyRect
0028             _dirtyRect = _startRect;
0029 
0030             // do some math so that the animation finishes at new endRect without discontinuity
0031             const double ratio( _timeLine.value()/(1.0-_timeLine.value() ) );
0032             _startRect.x += double( _animatedRect.x - _endRect.x )*ratio;
0033             _startRect.y += double( _animatedRect.y - _endRect.y )*ratio;
0034             _startRect.width += double( _animatedRect.width - _endRect.width )*ratio;
0035             _startRect.height += double( _animatedRect.height - _endRect.height )*ratio;
0036 
0037 
0038         } else {
0039 
0040             if( _timeLine.isRunning() ) _timeLine.stop();
0041             _startRect = startRect;
0042             _timeLine.start();
0043 
0044         }
0045 
0046         return;
0047 
0048     }
0049 
0050     //________________________________________________________________________________
0051     void FollowMouseData::updateAnimatedRect( void )
0052     {
0053         if( _timeLine.isRunning() &&
0054             Gtk::gdk_rectangle_is_valid( &_startRect ) &&
0055             Gtk::gdk_rectangle_is_valid( &_endRect ) )
0056         {
0057 
0058             _animatedRect.x = _startRect.x + double( _endRect.x - _startRect.x )*_timeLine.value();
0059             _animatedRect.y = _startRect.y + double( _endRect.y - _startRect.y )*_timeLine.value();
0060             _animatedRect.width = _startRect.width + double( _endRect.width - _startRect.width )*_timeLine.value();
0061             _animatedRect.height = _startRect.height + double( _endRect.height - _startRect.height )*_timeLine.value();
0062 
0063         } else {
0064 
0065             _animatedRect = Gtk::gdk_rectangle();
0066 
0067         }
0068 
0069         return;
0070 
0071     }
0072 
0073     //________________________________________________________________________________
0074     GdkRectangle FollowMouseData::dirtyRect( void )
0075     {
0076 
0077         GdkRectangle rect( Gtk::gdk_rectangle() );
0078         Gtk::gdk_rectangle_union( &_startRect, &_animatedRect, &rect );
0079 
0080         // also union with dirty rect
0081         if( Gtk::gdk_rectangle_is_valid( &_dirtyRect ) )
0082         {
0083             Gtk::gdk_rectangle_union( &_dirtyRect, &rect, &rect );
0084             _dirtyRect = Gtk::gdk_rectangle();
0085         }
0086 
0087         return rect;
0088 
0089     }
0090 
0091 
0092 }