/usr/include/qgis/qgsmaptip.h is in libqgis-dev 1.7.4+1.7.5~20120320-1.1+b1.
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qgsmaptip.h - Query a layer and show a maptip on the canvas
---------------------
begin : October 2007
copyright : (C) 2007 by Gary Sherman
email : sherman @ mrcc dot com
***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#ifndef _QGSMAPTIP_H_
#define _QGSMAPTIP_H_
class QgsMapLayer;
class QgsMapCanvas;
class QPoint;
class QString;
/** \ingroup gui
* A maptip is a class to display a tip on a map canvas
* when a mouse is hovered over a feature.
*/
class GUI_EXPORT QgsMapTip
{
public:
/** Default constructor
*/
QgsMapTip();
/** Destructor
*/
virtual ~QgsMapTip();
/** Show a maptip at a given point on the map canvas
* @param thepLayer a qgis vector map layer pointer that will
* be used to provide the attribute data for the map tip.
* @param theMapPosition a reference to the position of the cursor
* in map coordinatess.
* @param thePixelPosition a reference to the position of the cursor
* in pixel coordinates.
* @param mpMapCanvas a map canvas on which the tip is drawn
*/
void showMapTip( QgsMapLayer * thepLayer,
QgsPoint & theMapPosition,
QPoint & thePixelPosition,
QgsMapCanvas *mpMapCanvas );
/** Clear the current maptip if it exists
* @param mpMapCanvas the canvas from which the tip should be cleared.
*/
void clear( QgsMapCanvas *mpMapCanvas );
private:
// Fetch the feature to use for the maptip text. Only the first feature in the
// search radius is used
QString fetchFeature( QgsMapLayer * thepLayer,
QgsPoint & theMapPosition,
QgsMapCanvas *thepMapCanvas );
// Flag to indicate if a maptip is currently being displayed
bool mMapTipVisible;
// Last point on the map canvas when the maptip timer fired. This point is in widget pixel
// coordinates
QPoint mLastPosition;
};
#endif // _QGSMAPTIP_H_
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