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 "user/user.h"
29 * @brief Map view widget
31 * @author Sami Rämö - sami.ramo (at) ixonos.com
33 class MapView : public QGraphicsView
41 * @param parent Parent
43 MapView(QWidget *parent = 0);
45 /*******************************************************************************
46 * BASE CLASS INHERITED AND REIMPLEMENTED MEMBER FUNCTIONS
47 ******************************************************************************/
50 * @brief Called when view is resized.
52 * @param event resize event
54 void resizeEvent(QResizeEvent *event);
58 * @brief Event handler for mouse move events
60 * Does calculate mouse movement delta from last event position and new view center
61 * based on that delta. Saves current event position for next round. Emits viewScrolled
62 * signal and doesn't actually scroll the view.
63 * @param event Mouse event
65 void mouseMoveEvent(QMouseEvent *event);
68 * @brief Event handler for mouse press events
70 * Saves inial values for mouse and scene location for dragging view.
71 * @param event Mouse event
73 void mousePressEvent(QMouseEvent *event);
76 * @brief Event handler for timer events, used for smooth zoom effect
80 void timerEvent(QTimerEvent *event);
82 /*******************************************************************************
83 * MEMBER FUNCTIONS AND SLOTS
84 ******************************************************************************/
87 * @brief Slot for centering view to new location
89 * @param sceneCoordinate Scene coordinates of the new center point
91 void centerToSceneCoordinates(QPoint sceneCoordinate);
94 * @brief Set zoom level of the view
96 * @param zoomLevel Zoom level
98 void setZoomLevel(int zoomLevel);
102 * @brief get current horizontal scale (vertical should be same)
104 * @return qreal Current horizontal scale value
106 qreal currentScale();
108 /*******************************************************************************
110 ******************************************************************************/
113 * @brief Signal for view resize events.
115 * Signal is emitted when view has been resized.
116 * @param size view size
118 void viewResized(const QSize &size);
121 * @brief Signal for view scroll events
123 * Signal is emitted when view is scrolled.
124 * @param sceneCoordinate Scene coordinates of the new center point of the view
126 void viewScrolled(QPoint sceneCoordinate);
129 * @brief Signal for informing that zooming in is finished
132 void viewZoomInFinished();
135 * @brief Signal for updating view content
137 * Signal is emitted when view content needs an update.
138 * @param viewTopLeft Scene coordinate of the viewport top left corner
140 void viewContentChanged(QPoint viewTopLeft);
142 /*******************************************************************************
144 ******************************************************************************/
146 QPoint m_mousePosition; ///< Previous mouse event position
147 QPoint m_scenePosition; ///< New center position
148 int m_timerID; ///< ID number of the timer used for smooth zoom effect
149 qreal m_zoomScaleDelta; ///< Scaling factor delta for smooth zoom transition effect
150 qreal m_zoomTargetScale; ///< Scaling factor of the target zoom level