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1211 | werner | 1 | /******************************************************************************************** |
2 | ** iLand - an individual based forest landscape and disturbance model |
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3 | ** http://iland.boku.ac.at |
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4 | ** Copyright (C) 2009- Werner Rammer, Rupert Seidl |
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5 | ** |
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6 | ** This program is free software: you can redistribute it and/or modify |
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7 | ** it under the terms of the GNU General Public License as published by |
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8 | ** the Free Software Foundation, either version 3 of the License, or |
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9 | ** (at your option) any later version. |
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10 | ** |
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11 | ** This program is distributed in the hope that it will be useful, |
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12 | ** but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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14 | ** GNU General Public License for more details. |
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15 | ** |
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16 | ** You should have received a copy of the GNU General Public License |
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17 | ** along with this program. If not, see <http://www.gnu.org/licenses/>. |
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18 | ********************************************************************************************/ |
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808 | werner | 19 | #ifndef VIEWPORT_H |
20 | #define VIEWPORT_H |
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21 | #include <QtGui> |
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22 | |||
23 | class Viewport |
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24 | { |
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25 | public: |
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26 | Viewport(): m_viewAll(true), m_scale_worldtoscreen(1.) {} |
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27 | Viewport(const QRectF worldrect, const QRect screenrect) { setWorldRect(worldrect); setScreenRect(screenrect); zoomToAll(); } |
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28 | // coordinate transformations |
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29 | const QPointF toWorld(const QPoint pixel); |
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30 | const QPoint toScreen(const QPointF p); |
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31 | const QRect toScreen(const QRectF world) { QPoint p1=toScreen(world.bottomLeft()); QPoint p2=toScreen(world.topRight()); QRect r(p1, QSize(p2.x()-p1.x(), p2.y()-p1.y())); return r; } |
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32 | // getters |
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33 | const QRectF viewRect() const { return m_viewport; } |
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34 | bool isVisible(const QPointF &world_coord) const; |
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35 | bool isVisible(const QRectF &world_rect) const; |
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36 | // zoom |
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37 | void zoomToAll(); |
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38 | void zoomTo(const QPoint &screen_point, const double factor); |
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39 | void moveTo(const QPoint &screen_from, const QPoint &screen_to); |
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40 | // move |
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41 | void setViewPoint(const QPointF &world_center, const double px_per_meter); |
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42 | // conversion of length |
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43 | double pixelToMeter(const int pixel) { return pixel/m_scale_worldtoscreen; } |
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44 | int meterToPixel(const double meter) { return qRound(meter * m_scale_worldtoscreen);} |
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45 | // setters... |
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46 | void setViewRect(const QRectF &viewrect) { m_viewport = viewrect; } |
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47 | void setWorldRect(const QRectF &worldrect) { m_world = worldrect; } |
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48 | void setScreenRect(const QRect &viewrect); |
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49 | private: |
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50 | bool m_viewAll; |
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51 | QRect m_screen; |
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52 | QRectF m_world; |
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53 | QRectF m_viewport; |
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54 | QPointF m_delta_worldtoscreen; |
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55 | double m_scale_worldtoscreen; |
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56 | }; |
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57 | |||
58 | |||
59 | #endif // VIEWPORT_H |