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qgsmaptip.h
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1 /***************************************************************************
2  qgsmaptip.h - Query a layer and show a maptip on the canvas
3  ---------------------
4  begin : October 2007
5  copyright : (C) 2007 by Gary Sherman
6  email : sherman @ mrcc dot com
7  ***************************************************************************
8  * *
9  * This program is free software; you can redistribute it and/or modify *
10  * it under the terms of the GNU General Public License as published by *
11  * the Free Software Foundation; either version 2 of the License, or *
12  * (at your option) any later version. *
13  * *
14  ***************************************************************************/
15 #ifndef _QGSMAPTIP_H_
16 #define _QGSMAPTIP_H_
17 
18 class QgsMapLayer;
19 class QgsMapCanvas;
20 class QPoint;
21 class QString;
22 
23 
28 class GUI_EXPORT QgsMapTip
29 {
30  public:
33  QgsMapTip();
36  virtual ~QgsMapTip();
46  void showMapTip( QgsMapLayer * thepLayer,
47  QgsPoint & theMapPosition,
48  QPoint & thePixelPosition,
49  QgsMapCanvas *mpMapCanvas );
53  void clear( QgsMapCanvas *mpMapCanvas );
54  private:
55  // Fetch the feature to use for the maptip text. Only the first feature in the
56  // search radius is used
57  QString fetchFeature( QgsMapLayer * thepLayer,
58  QgsPoint & theMapPosition,
59  QgsMapCanvas *thepMapCanvas );
60  // Flag to indicate if a maptip is currently being displayed
62  // Last point on the map canvas when the maptip timer fired. This point is in widget pixel
63  // coordinates
64  QPoint mLastPosition;
65 
66 };
67 #endif // _QGSMAPTIP_H_