KChart

KChartZoomParameters.h
1 /*
2  * Copyright (C) 2001-2015 Klaralvdalens Datakonsult AB. All rights reserved.
3  *
4  * This file is part of the KD Chart library.
5  *
6  * This program is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU General Public License as
8  * published by the Free Software Foundation; either version 2 of
9  * the License, or (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program. If not, see <https://www.gnu.org/licenses/>.
18  */
19 
20 #ifndef ZOOMPARAMETERS_H
21 #define ZOOMPARAMETERS_H
22 
23 //
24 // W A R N I N G
25 // -------------
26 //
27 // This file is not part of the KD Chart API. It exists purely as an
28 // implementation detail. This header file may change from version to
29 // version without notice, or even be removed.
30 //
31 // We mean it.
32 //
33 
34 namespace KChart {
40  public:
42  : xFactor( 1.0 ),
43  yFactor( 1.0 ),
44  xCenter( 0.5 ),
45  yCenter( 0.5)
46  {
47  }
48 
49  ZoomParameters( qreal xFactor, qreal yFactor, const QPointF& center )
50  : xFactor( xFactor ),
51  yFactor( yFactor ),
52  xCenter( center.x() ),
53  yCenter( center.y() )
54  {
55  }
56 
57  void setCenter( const QPointF& center )
58  {
59  xCenter = center.x();
60  yCenter = center.y();
61  }
62  const QPointF center() const
63  {
64  return QPointF( xCenter, yCenter );
65  }
66 
67  qreal xFactor;
68  qreal yFactor;
69 
70  qreal xCenter;
71  qreal yCenter;
72  };
73 }
74 
75 #endif
qreal x() const const
qreal y() const const
ZoomParameters stores the center and the factor of zooming internally.
Global namespace.
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