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3nids3nids
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create scale widget (scale combo box + button to set scale from map canvas)
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‎python/gui/gui.sip

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%Include qgsrubberband.sip
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%Include qgsscalecombobox.sip
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%Include qgsscalerangewidget.sip
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%Include qgsscalewidget.sip
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%Include qgsscalevisibilitydialog.sip
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%Include qgssearchquerybuilder.sip
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%Include qgstextannotationitem.sip

‎python/gui/qgsscalewidget.sip

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/** A combobox which lets the user select map scale from predefined list
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* and highlights nearest to current scale value
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*/
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class QgsScaleWidget : QWidget
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{
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%TypeHeaderCode
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#include <qgsscalewidget.h>
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%End
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public:
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QgsScaleWidget( QWidget* parent = 0 );
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~QgsScaleWidget();
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//! shows a button to set the scale to the current scale of the map canvas next to the combobox
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//! @note the map canvas must be defined to show the button
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void setShowCurrentScaleButton( bool showCurrentScaleButton );
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bool showCurrentScaleButton();
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//! set the map canvas associated to the current button
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void setMapCanvas( QgsMapCanvas* canvas );
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//! Function to read the selected scale as text
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QString scaleString();
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//! Function to set the selected scale from text
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bool setScaleString( QString scaleTxt );
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//! Function to read the selected scale as double
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double scale();
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//! Function to set the selected scale from double
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void setScale( double scale );
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//! Helper function to convert a double to scale string
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// Performs rounding, so an exact representation is not to
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// be expected.
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static QString toString( double scale );
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//! Helper function to convert a scale string to double
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static double toDouble( QString scaleString, bool *ok = NULL );
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signals:
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//! Signal is emitted when *user* has finished editing/selecting a new scale.
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void scaleChanged();
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public slots:
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void updateScales( const QStringList &scales = QStringList() );
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};
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‎src/gui/CMakeLists.txt

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@@ -215,6 +215,7 @@ qgsrubberband.cpp
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qgsscalecombobox.cpp
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qgsscalerangewidget.cpp
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qgsscalevisibilitydialog.cpp
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qgsscalewidget.cpp
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qgssearchquerybuilder.cpp
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qgsslider.cpp
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qgssublayersdialog.cpp
@@ -412,6 +413,7 @@ qgsrelationmanagerdialog.h
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qgsscalecombobox.h
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qgsscalerangewidget.h
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qgsscalevisibilitydialog.h
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qgsscalewidget.h
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qgssearchquerybuilder.h
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qgsslider.h
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qgssublayersdialog.h
@@ -491,6 +493,7 @@ qgsrubberband.h
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qgsscalecombobox.h
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qgsscalerangewidget.h
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qgsscalevisibilitydialog.h
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qgsscalewidget.h
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qgssearchquerybuilder.h
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qgsslider.h
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qgssublayersdialog.h

‎src/gui/qgsscalewidget.cpp

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/***************************************************************************
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qgsscalewidget.cpp
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--------------------------------------
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Date : 08.01.2015
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Copyright : (C) 2014 Denis Rouzaud
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Email : denis.rouzaud@gmail.com
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***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#include <QHBoxLayout>
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#include "qgsapplication.h"
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#include "qgsscalewidget.h"
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#include "qgsmapcanvas.h"
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QgsScaleWidget::QgsScaleWidget( QWidget *parent )
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: QWidget( parent )
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, mShowCurrentScaleButton( false )
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, mCanvas( NULL )
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{
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QHBoxLayout* layout = new QHBoxLayout( this );
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layout->setContentsMargins( 0, 0, 0, 0 );
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layout->setSpacing( 2 );
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mScaleComboBox = new QgsScaleComboBox( this );
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layout->addWidget( mScaleComboBox );
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mCurrentScaleButton = new QToolButton( this );
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mCurrentScaleButton->setIcon( QgsApplication::getThemeIcon( "/mActionMapIdentification.svg" ) );
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layout->addWidget( mCurrentScaleButton );
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mCurrentScaleButton->hide();
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connect( mScaleComboBox, SIGNAL( scaleChanged() ), this, SIGNAL( scaleChanged() ) );
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connect( mCurrentScaleButton, SIGNAL( clicked() ), this, SLOT( setScaleFromCanvas() ) );
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}
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QgsScaleWidget::~QgsScaleWidget()
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{
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}
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void QgsScaleWidget::setShowCurrentScaleButton( bool showCurrentScaleButton )
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{
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mShowCurrentScaleButton = showCurrentScaleButton;
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mCurrentScaleButton->setVisible( mShowCurrentScaleButton && mCanvas );
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}
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void QgsScaleWidget::setMapCanvas( QgsMapCanvas* canvas )
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{
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mCanvas = canvas;
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mCurrentScaleButton->setVisible( mShowCurrentScaleButton && mCanvas );
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}
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void QgsScaleWidget::setScaleFromCanvas()
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{
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if ( !mCanvas )
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return;
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setScale( mCanvas->scale() );
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}
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‎src/gui/qgsscalewidget.h

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/***************************************************************************
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qgsscalewidget.h
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--------------------------------------
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Date : 08.01.2015
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Copyright : (C) 2014 Denis Rouzaud
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Email : denis.rouzaud@gmail.com
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***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#ifndef QGSSCALEWIDGET_H
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#define QGSSCALEWIDGET_H
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#include <QWidget>
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#include <QToolButton>
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#include "qgsscalecombobox.h"
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class QgsMapCanvas;
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/** \ingroup gui
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* A combobox which lets the user select map scale from predefined list
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* and highlights nearest to current scale value
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**/
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class GUI_EXPORT QgsScaleWidget : public QWidget
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{
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Q_OBJECT
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Q_PROPERTY( bool showCurrentScaleButton READ showCurrentScaleButton WRITE setShowCurrentScaleButton )
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public:
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explicit QgsScaleWidget(QWidget *parent = 0);
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virtual ~QgsScaleWidget();
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//! shows a button to set the scale to the current scale of the map canvas next to the combobox
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//! @note the map canvas must be defined to show the button
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void setShowCurrentScaleButton( bool showCurrentScaleButton );
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bool showCurrentScaleButton(){ return mShowCurrentScaleButton;}
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//! set the map canvas associated to the current button
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void setMapCanvas( QgsMapCanvas* canvas );
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//! Function to read the selected scale as text
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QString scaleString(){return mScaleComboBox->scaleString();}
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//! Function to set the selected scale from text
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bool setScaleString( QString scaleTxt ){return mScaleComboBox->setScaleString(scaleTxt);}
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//! Function to read the selected scale as double
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double scale(){return mScaleComboBox->scale();}
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//! Function to set the selected scale from double
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void setScale( double scale ){return mScaleComboBox->setScale(scale);}
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//! Helper function to convert a double to scale string
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// Performs rounding, so an exact representation is not to
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// be expected.
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static QString toString( double scale ){return QgsScaleComboBox::toString(scale);}
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//! Helper function to convert a scale string to double
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static double toDouble( QString scaleString, bool *ok = NULL ){return QgsScaleComboBox::toDouble(scaleString, ok);}
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public slots:
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void updateScales( const QStringList &scales = QStringList() ){return mScaleComboBox->updateScales(scales);}
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//! assign the current scale from the map canvas
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void setScaleFromCanvas();
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signals:
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//! Signal is emitted when *user* has finished editing/selecting a new scale.
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void scaleChanged();
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private:
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QgsScaleComboBox* mScaleComboBox;
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QToolButton* mCurrentScaleButton;
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QgsMapCanvas* mCanvas;
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bool mShowCurrentScaleButton;
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};
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#endif // QGSSCALEWIDGET_H

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