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337 | KeyOz | 1 | /* |
2 | * |
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3 | * This file is part of QMapControl, |
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4 | * an open-source cross-platform map widget |
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5 | * |
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6 | * Copyright (C) 2007 - 2008 Kai Winter |
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7 | * |
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8 | * This program is free software: you can redistribute it and/or modify |
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9 | * it under the terms of the GNU Lesser General Public License as published by |
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10 | * the Free Software Foundation, either version 3 of the License, or |
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11 | * (at your option) any later version. |
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12 | * |
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13 | * This program is distributed in the hope that it will be useful, |
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14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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16 | * GNU Lesser General Public License for more details. |
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17 | * |
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18 | * You should have received a copy of the GNU Lesser General Public License |
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19 | * along with QMapControl. If not, see <http://www.gnu.org/licenses/>. |
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20 | * |
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21 | * Contact e-mail: kaiwinter@gmx.de |
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22 | * Program URL : http://qmapcontrol.sourceforge.net/ |
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23 | * |
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24 | */ |
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25 | |||
26 | #ifndef LAYERMANAGER_H |
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27 | #define LAYERMANAGER_H |
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28 | |||
29 | #include <QObject> |
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30 | #include <QMap> |
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31 | #include <QListIterator> |
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32 | #include "layer.h" |
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33 | #include "mapadapter.h" |
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34 | #include "mapcontrol.h" |
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35 | |||
36 | namespace qmapcontrol |
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37 | { |
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38 | class Layer; |
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39 | class MapAdapter; |
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40 | class MapControl; |
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41 | |||
42 | class LayerManager; |
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43 | |||
44 | //! Handles Layers and viewport related settings |
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45 | /*! |
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46 | * This class handles internally all layers which were added to the MapControl. |
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47 | * It also stores values for scrolling. |
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48 | * It initiates the creation of a new offscreen image and on zooming the zoom images gets here created. |
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49 | * @author Kai Winter <kaiwinter@gmx.de> |
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50 | */ |
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51 | class LayerManager : public QObject |
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52 | { |
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53 | Q_OBJECT |
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54 | |||
55 | public: |
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56 | LayerManager(MapControl*, QSize); |
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57 | ~LayerManager(); |
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58 | |||
59 | //! returns the coordinate of the center of the map |
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60 | /*! |
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61 | * @return returns the coordinate of the middle of the screen |
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62 | */ |
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63 | QPointF currentCoordinate() const; |
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64 | |||
65 | //! returns the current offscreen image |
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66 | /*! |
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67 | * @return the current offscreen image |
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68 | */ |
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69 | QPixmap getImage() const; |
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70 | |||
71 | //! returns the layer with the given name |
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72 | /*! |
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73 | * @param layername name of the wanted layer |
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74 | * @return the layer with the given name |
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75 | */ |
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76 | Layer* layer(const QString&) const; |
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77 | |||
78 | //! returns the base layer |
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79 | /*! |
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80 | * This will return the base layer of the LayerManager. |
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81 | * The base layer is the one which is used to do internal coordinate calculations. |
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82 | * @return the base layer |
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83 | */ |
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84 | Layer* layer() const; |
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85 | |||
86 | //! returns the names of all layers |
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87 | /*! |
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88 | * @return returns a QList with the names of all layers |
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89 | */ |
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90 | QList<QString> layers() const; |
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91 | |||
92 | //! sets the middle of the map to the given coordinate |
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93 | /*! |
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94 | * @param coordinate the coordinate which the view´s middle should be set to |
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95 | */ |
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96 | void setView(const QPointF& coordinate); |
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97 | |||
98 | //! sets the view, so all coordinates are visible |
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99 | /*! |
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100 | * @param coordinates the Coorinates which should be visible |
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101 | */ |
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102 | void setView(const QList<QPointF> coordinates); |
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103 | |||
104 | //! sets the view and zooms in, so all coordinates are visible |
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105 | /*! |
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106 | * The code of setting the view to multiple coordinates is "brute force" and pretty slow. |
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107 | * Have to be reworked. |
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108 | * @param coordinates the Coorinates which should be visible |
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109 | */ |
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110 | void setViewAndZoomIn (const QList<QPointF> coordinates); |
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111 | |||
112 | //! zooms in one step |
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113 | void zoomIn(); |
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114 | |||
115 | //! zooms out one step |
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116 | void zoomOut(); |
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117 | |||
118 | //! sets the given zoomlevel |
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119 | /*! |
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120 | * @param zoomlevel the zoomlevel |
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121 | */ |
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122 | void setZoom(int zoomlevel); |
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123 | |||
124 | //! The Viewport of the display |
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125 | /*! |
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126 | * Returns the visible viewport in world coordinates |
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127 | * @return the visible viewport in world coordinates |
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128 | */ |
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129 | QRectF getViewport() const; |
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130 | |||
131 | //! scrolls the view |
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132 | /*! |
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133 | * Scrolls the view by the given value in pixels and in display coordinates |
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134 | * @param offset the distance which the view should be scrolled |
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135 | */ |
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136 | void scrollView(const QPoint& offset); |
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137 | |||
138 | //! forwards mouseevents to the layers |
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139 | /*! |
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140 | * This method is invoked by the MapControl which receives Mouse Events. |
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141 | * These events are forwarded to the layers, so they can check for clicked geometries. |
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142 | * @param evnt the mouse event |
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143 | */ |
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144 | void mouseEvent(const QMouseEvent* evnt); |
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145 | |||
146 | //! returns the middle of the map in projection coordinates |
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147 | /*! |
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148 | * |
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149 | * @return the middle of the map in projection coordinates |
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150 | */ |
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151 | QPoint getMapmiddle_px() const; |
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152 | |||
153 | void forceRedraw(); |
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154 | void removeZoomImage(); |
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155 | |||
156 | //! adds a layer |
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157 | /*! |
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158 | * If multiple layers are added, they are painted in the added order. |
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159 | * @param layer the layer which should be added |
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160 | */ |
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161 | void addLayer(Layer* layer); |
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162 | |||
163 | //! returns the current zoom level |
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164 | /*! |
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165 | * @return returns the current zoom level |
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166 | */ |
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167 | int currentZoom() const; |
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168 | |||
169 | void drawGeoms(QPainter* painter); |
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170 | void drawImage(QPainter* painter); |
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171 | |||
172 | private: |
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173 | LayerManager& operator=(const LayerManager& rhs); |
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174 | LayerManager(const LayerManager& old); |
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175 | //! This method have to be invoked to draw a new offscreen image |
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176 | /*! |
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177 | * @param clearImage if the current offscreeen image should be cleared |
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178 | * @param showZoomImage if a zoom image should be painted |
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179 | */ |
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180 | void newOffscreenImage(bool clearImage=true, bool showZoomImage=true); |
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181 | inline bool checkOffscreen() const; |
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182 | inline bool containsAll(QList<QPointF> coordinates) const; |
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183 | inline void moveWidgets(); |
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184 | inline void setMiddle(QList<QPointF> coordinates); |
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185 | |||
186 | MapControl* mapcontrol; |
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187 | QPoint screenmiddle; // middle of the screen |
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188 | QPoint scroll; // scrollvalue of the offscreen image |
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189 | QPoint zoomImageScroll; // scrollvalue of the zoom image |
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190 | |||
191 | QSize size; // widget size |
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192 | QSize offSize; // size of the offscreen image |
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193 | |||
194 | QPixmap composedOffscreenImage; |
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195 | QPixmap composedOffscreenImage2; |
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196 | QPixmap zoomImage; |
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197 | |||
198 | QList<Layer*> mylayers; |
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199 | |||
200 | QPoint mapmiddle_px; // projection-display coordinates |
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201 | QPointF mapmiddle; // world coordinate |
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202 | |||
203 | QMutex scrollMutex; |
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204 | QPoint whilenewscroll; |
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205 | mutable QMutex refreshMutex; |
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206 | |||
207 | public slots: |
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208 | void updateRequest(QRectF rect); |
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209 | void updateRequest(); |
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210 | void resize(QSize newSize); |
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211 | }; |
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212 | } |
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213 | #endif |