qgsmaptip.h

Go to the documentation of this file.

/***************************************************************************
    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;
class QgsPointXY;
class QgsVectorLayer;
class QgsWebView;

#include <QWidget>
#include <QUrl>
#include "qgsfeature.h"
#include "qgis_gui.h"

class GUI_EXPORT QgsMapTip : public QWidget
{
    Q_OBJECT
  public:

    QgsMapTip();

    void showMapTip( QgsMapLayer *thepLayer,
                     QgsPointXY &mapPosition,
                     QPoint &pixelPosition,
                     QgsMapCanvas *mpMapCanvas );

    void clear( QgsMapCanvas *mpMapCanvas = nullptr );

    void applyFontSettings();

  private slots:
    void onLinkClicked( const QUrl &url );
    void resizeContent();

  private:
    // Fetch the feature to use for the maptip text.
    // Only the first feature in the search radius is used
    QString fetchFeature( QgsMapLayer *thepLayer,
                          QgsPointXY &mapPosition,
                          QgsMapCanvas *mapCanvas );

    QString replaceText(
      QString displayText, QgsVectorLayer *layer, QgsFeature &feat );

    // Flag to indicate if a maptip is currently being displayed
    bool mMapTipVisible;

    QWidget *mWidget = nullptr;
    QgsWebView *mWebView = nullptr;

    QString mFontFamily;
    int mFontSize = 8;

    const int MARGIN_VALUE = 5;
};
#endif // QGSMAPTIP_H