/usr/include/qgis/qgsscalewidget.h is in libqgis-dev 2.14.11+dfsg-3+deb9u1.
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qgsscalewidget.h
--------------------------------------
Date : 08.01.2015
Copyright : (C) 2014 Denis Rouzaud
Email : denis.rouzaud@gmail.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 QGSSCALEWIDGET_H
#define QGSSCALEWIDGET_H
#include <QWidget>
#include <QToolButton>
#include "qgsscalecombobox.h"
class QgsMapCanvas;
/** \ingroup gui
* A combobox which lets the user select map scale from predefined list
* and highlights nearest to current scale value
**/
class GUI_EXPORT QgsScaleWidget : public QWidget
{
Q_OBJECT
Q_PROPERTY( bool showCurrentScaleButton READ showCurrentScaleButton WRITE setShowCurrentScaleButton )
public:
explicit QgsScaleWidget( QWidget *parent = nullptr );
virtual ~QgsScaleWidget();
//! shows a button to set the scale to the current scale of the map canvas next to the combobox
//! @note the map canvas must be defined to show the button
void setShowCurrentScaleButton( bool showCurrentScaleButton );
bool showCurrentScaleButton() { return mShowCurrentScaleButton;}
//! set the map canvas associated to the current button
void setMapCanvas( QgsMapCanvas* canvas );
//! Function to read the selected scale as text
QString scaleString() { return mScaleComboBox->scaleString(); }
//! Function to set the selected scale from text
bool setScaleString( const QString& scaleTxt ) { return mScaleComboBox->setScaleString( scaleTxt ); }
//! Function to read the selected scale as double
double scale() { return mScaleComboBox->scale();}
//! Function to set the selected scale from double
void setScale( double scale ) { return mScaleComboBox->setScale( scale ); }
//! Helper function to convert a double to scale string
// Performs rounding, so an exact representation is not to
// be expected.
static QString toString( double scale ) { return QgsScaleComboBox::toString( scale ); }
//! Helper function to convert a scale string to double
static double toDouble( const QString& scaleString, bool *ok = nullptr ) { return QgsScaleComboBox::toDouble( scaleString, ok ); }
public slots:
void updateScales( const QStringList &scales = QStringList() ) { return mScaleComboBox->updateScales( scales ); }
//! assign the current scale from the map canvas
void setScaleFromCanvas();
signals:
//! Signal is emitted when *user* has finished editing/selecting a new scale.
void scaleChanged();
private:
QgsScaleComboBox* mScaleComboBox;
QToolButton* mCurrentScaleButton;
QgsMapCanvas* mCanvas;
bool mShowCurrentScaleButton;
};
#endif // QGSSCALEWIDGET_H
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