2 Situare - A location system for Facebook
3 Copyright (C) 2010 Ixonos Plc. Authors:
5 Sami Rämö - sami.ramo@ixonos.com
7 Situare is free software; you can redistribute it and/or
8 modify it under the terms of the GNU General Public License
9 version 2 as published by the Free Software Foundation.
11 Situare 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.
16 You should have received a copy of the GNU General Public License
17 along with Situare; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
25 #include <QGraphicsView>
26 #include <QPropertyAnimation>
29 * @brief Map view widget
31 * @author Sami Rämö - sami.ramo (at) ixonos.com
33 class MapView : public QGraphicsView
37 Q_PROPERTY(qreal viewScale READ viewScale WRITE setViewScale)
43 * @param parent Parent
45 MapView(QWidget *parent = 0);
47 /*******************************************************************************
48 * BASE CLASS INHERITED AND REIMPLEMENTED MEMBER FUNCTIONS
49 ******************************************************************************/
52 * @brief Called when view is resized.
54 * @param event resize event
56 void resizeEvent(QResizeEvent *event);
60 * @brief Event handler for mouse move events
62 * Does calculate mouse movement delta from last event position and new view center
63 * based on that delta. Saves current event position for next round. Emits viewScrolled
64 * signal and doesn't actually scroll the view.
65 * @param event Mouse event
67 void mouseMoveEvent(QMouseEvent *event);
70 * @brief Event handler for mouse press events
72 * Saves inial values for mouse and scene location for dragging view.
73 * @param event Mouse event
75 void mousePressEvent(QMouseEvent *event);
78 * @brief Event handler for timer events, used for smooth zoom effect
82 void timerEvent(QTimerEvent *event);
84 /*******************************************************************************
85 * MEMBER FUNCTIONS AND SLOTS
86 ******************************************************************************/
89 * @brief Slot for centering view to new location
91 * @param sceneCoordinate Scene coordinates of the new center point
93 void centerToSceneCoordinates(QPoint sceneCoordinate);
96 * @brief Set zoom level of the view
98 * @param zoomLevel Zoom level
100 void setZoomLevel(int zoomLevel);
104 * @brief get current horizontal scale (vertical should be same)
106 * @return qreal Current horizontal scale value
108 qreal currentScale();
110 void setViewScale(qreal viewScale);
114 /*******************************************************************************
116 ******************************************************************************/
119 * @brief Signal for view resize events.
121 * Signal is emitted when view has been resized.
122 * @param size view size
124 void viewResized(const QSize &size);
127 * @brief Signal for view scroll events
129 * Signal is emitted when view is scrolled.
130 * @param sceneCoordinate Scene coordinates of the new center point of the view
132 void viewScrolled(QPoint sceneCoordinate);
135 * @brief Signal for informing that zooming animation is finished
138 void viewZoomFinished();
141 * @brief Signal for updating view content
143 * Signal is emitted when view content needs an update.
144 * @param viewTopLeft Scene coordinate of the viewport top left corner
146 void viewContentChanged(QPoint viewTopLeft);
148 /*******************************************************************************
150 ******************************************************************************/
152 QPoint m_mousePosition; ///< Previous mouse event position
153 QPoint m_scenePosition; ///< New center position
154 int m_timerID; ///< ID number of the timer used for smooth zoom effect
155 QPropertyAnimation *m_zoomAnimation;
156 qreal m_zoomScaleDelta; ///< Scaling factor delta for smooth zoom transition effect
157 qreal m_zoomTargetScale; ///< Scaling factor of the target zoom level