File indexing completed on 2024-05-12 16:33:36 

0001 /* This file is part of the KDE project
0002 
0003    Copyright 2010 Johannes Simon <johannes.simon@gmail.com>
0004 
0005    This library is free software; you can redistribute it and/or
0006    modify it under the terms of the GNU Library General Public
0007    License as published by the Free Software Foundation; either
0008    version 2 of the License, or (at your option) any later version.
0009 
0010    This library is distributed in the hope that it will be useful,
0011    but WITHOUT ANY WARRANTY; without even the implied warranty of
0012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
0013    Library General Public License for more details.
0014 
0015    You should have received a copy of the GNU Library General Public License
0016    along with this library; see the file COPYING.LIB.  If not, write to
0017    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
0018    Boston, MA 02110-1301, USA.
0019 */
0020 
0021 #ifndef KCHART_SCREEN_CONVERSIONS_H
0022 #define KCHART_SCREEN_CONVERSIONS_H
0023 
0024 class QPainter;
0025 class QPaintDevice;
0026 class QPoint;
0027 class QPointF;
0028 class QSize;
0029 class QSizeF;
0030 class QRect;
0031 class QRectF;
0032 
0033 namespace KoChart {
0034 
0035 class ScreenConversions
0036 {
0037 public:
0038     // pt --> px
0039     static qreal ptToPxX(qreal pt, const QPaintDevice* paintDevice);
0040     static qreal ptToPxY(qreal pt, const QPaintDevice* paintDevice);
0041     static qreal ptToPxX(qreal pt);
0042     static qreal ptToPxY(qreal pt);
0043     static void   scaleFromPtToPx(QPainter &painter);
0044     static QPoint scaleFromPtToPx(const QPointF &point, const QPaintDevice* paintDevice);
0045     static QSize  scaleFromPtToPx(const QSizeF &size, const QPaintDevice* paintDevice);
0046     static QSize  scaleFromPtToPx(const QSizeF &size, QPainter &painter);
0047     static QSize  scaleFromPtToPx(const QSizeF &size);
0048     static QRect  scaleFromPtToPx(const QRectF &rect, QPainter &painter);
0049 
0050     // px --> pt
0051     static qreal pxToPtX(qreal px);
0052     static qreal pxToPtY(qreal px);
0053     static QSizeF scaleFromPxToPt(const QSize &size);
0054 
0055     // auxcilliary
0056     static QSizeF toWidgetDpi(QWidget *widget, const QSizeF &size);
0057     static QSizeF fromWidgetDpi(QWidget *widget, const QSizeF &size);
0058     static void scaleToWidgetDpi(QWidget *widget, QPainter &painter);
0059 };
0060 
0061 } // namespace KoChart
0062 
0063 #endif // KCHART_SCREEN_CONVERSIONS_H