src/artisan/gviewport/CoordinateMapper.cpp

   1 /** Aesalon, a tool to visualize program behaviour in real time.
   2         Copyright (C) 2009-2011, Aesalon development team.
   3
   4         Aesalon is distributed under the terms of the GNU GPLv3. See
   5         the included file LICENSE for more information.
   6
   7         @file src/artisan/gviewport/CoordinateMapper.cpp
   8 */
   9
  10 #include "artisan/gviewport/CoordinateMapper.h"
  11
  12 #include "util/MessageSystem.h"
  13
  14 namespace Artisan {
  15 namespace GViewport {
  16
  17 CoordinateMapper::CoordinateMapper(const Rect &dataRect, const Rect &pixelRect)
  18         : m_dataRect(dataRect), m_pixelRect(pixelRect) {
  19
  20 }
  21
  22 CoordinateMapper::CoordinateMapper(const RenderedImage &image)
  23         : m_dataRect(image.dataRange()), m_pixelRect(image.pixelSize()) {
  24 }
  25
  26 Point CoordinateMapper::dataToPixel(const Point &dataPoint) {
  27         double xPercentage = (dataPoint.x() - m_dataRect.left()) / m_dataRect.width();
  28         double yPercentage = (dataPoint.y() - m_dataRect.top()) / m_dataRect.height();
  29
  30         return Point(
  31                 (xPercentage * m_pixelRect.width()) + m_pixelRect.left(),
  32                 (yPercentage * m_pixelRect.height()) + m_pixelRect.top());
  33 }
  34
  35 Rect CoordinateMapper::dataToPixel(const Rect &dataRect) {
  36         return Rect(dataToPixel(dataRect.topLeft()), dataToPixel(dataRect.bottomRight()));
  37 }
  38
  39 Point CoordinateMapper::pixelToData(const Point &pixelPoint) {
  40         double xPercentage = (pixelPoint.x() - m_pixelRect.left()) / m_pixelRect.width();
  41         double yPercentage = (pixelPoint.y() - m_pixelRect.top()) / m_pixelRect.height();
  42
  43         return Point(
  44                 (xPercentage * m_dataRect.width()) + m_dataRect.left(),
  45                 (yPercentage * m_dataRect.height()) + m_dataRect.top());
  46 }
  47
  48 Rect CoordinateMapper::pixelToData(const Rect &pixelRect) {
  49         return Rect(pixelToData(pixelRect.topLeft()), pixelToData(pixelRect.bottomRight()));
  50 }
  51
  52 Point CoordinateMapper::pixelToDataOffset(const Point &pixelPoint) {
  53         double xPercentage = (pixelPoint.x() - m_pixelRect.left()) / m_pixelRect.width();
  54         double yPercentage = (pixelPoint.y() - m_pixelRect.top()) / m_pixelRect.height();
  55
  56         return Point(
  57                 (xPercentage * m_dataRect.width()),
  58                 (yPercentage * m_dataRect.height()));
  59 }
  60
  61 } // namespace GViewport
  62 } // namespace Artisan