Minor clean ups

src/app/qgsstatusbarmagnifierwidget.cpp

@@ -23,24 +23,24 @@
 #include "qgsstatusbarmagnifierwidget.h"
 #include "qgsdoublespinbox.h"
 
-QgsStatusBarMagnifierWidget::QgsStatusBarMagnifierWidget( QWidget* parent ) :
-    QWidget( parent )
+QgsStatusBarMagnifierWidget::QgsStatusBarMagnifierWidget( QWidget* parent )
+    : QWidget( parent )
 {
   QSettings settings;
   int minimumFactor = ( int ) 100 * settings.value( "/qgis/magnifier_factor_min", 0.1 ).toDouble();
   int maximumFactor = ( int ) 100 * settings.value( "/qgis/magnifier_factor_max", 10 ).toDouble();
   int defaultFactor = ( int ) 100 * settings.value( "/qgis/magnifier_factor_default", 1.0 ).toDouble();
 
   // label
-  mLabel = new QLabel( this );
+  mLabel = new QLabel();
   mLabel->setMinimumWidth( 10 );
   mLabel->setMargin( 3 );
   mLabel->setAlignment( Qt::AlignCenter );
   mLabel->setFrameStyle( QFrame::NoFrame );
   mLabel->setText( tr( "Magnifier" ) );
   mLabel->setToolTip( tr( "Magnifier" ) );
 
-  mSpinBox = new QgsDoubleSpinBox( this );
+  mSpinBox = new QgsDoubleSpinBox();
   mSpinBox->setSuffix( "%" );
   mSpinBox->setKeyboardTracking( false );
   mSpinBox->setMaximumWidth( 120 );

src/app/qgsstatusbarmagnifierwidget.h

@@ -37,9 +37,8 @@ class APP_EXPORT QgsStatusBarMagnifierWidget : public QWidget
 
     /** Constructor
       * @param parent is the parent widget
-      * @param canvas the map canvas
       */
-    QgsStatusBarMagnifierWidget( QWidget* parent = 0 );
+    QgsStatusBarMagnifierWidget( QWidget* parent = nullptr );
 
     /** Destructor */
     virtual ~QgsStatusBarMagnifierWidget();

src/app/qgsstatusbarscalewidget.cpp

@@ -30,8 +30,8 @@ QgsStatusBarScaleWidget::QgsStatusBarScaleWidget( QgsMapCanvas *canvas, QWidget
     , mMapCanvas( canvas )
 {
   // add a label to show current scale
-  mLabel = new QLabel( QString(), this );
-  mLabel->setObjectName( "mScaleLable" );
+  mLabel = new QLabel();
+  mLabel->setObjectName( "mScaleLabel" );
   mLabel->setMinimumWidth( 10 );
   //mScaleLabel->setMaximumHeight( 20 );
   mLabel->setMargin( 3 );
@@ -40,7 +40,7 @@ QgsStatusBarScaleWidget::QgsStatusBarScaleWidget( QgsMapCanvas *canvas, QWidget
   mLabel->setText( tr( "Scale" ) );
   mLabel->setToolTip( tr( "Current map scale" ) );
 
-  mScale = new QgsScaleComboBox( this );
+  mScale = new QgsScaleComboBox();
   mScale->setObjectName( "mScaleEdit" );
   // seems setFont() change font only for popup not for line edit,
   // so we need to set font for it separately
@@ -49,7 +49,7 @@ QgsStatusBarScaleWidget::QgsStatusBarScaleWidget( QgsMapCanvas *canvas, QWidget
   mScale->setWhatsThis( tr( "Displays the current map scale" ) );
   mScale->setToolTip( tr( "Current map scale (formatted as x:y)" ) );
 
-  mLockButton = new QToolButton( this );
+  mLockButton = new QToolButton();
   mLockButton->setIcon( QIcon( QgsApplication::getThemeIcon( "/locked.svg" ) ) );
   mLockButton->setToolTip( tr( "Lock the scale to use magnifier to zoom in or out." ) );
   mLockButton->setCheckable( true );
@@ -80,7 +80,7 @@ void QgsStatusBarScaleWidget::setScale( double scale )
   mScale->setScale( scale );
 }
 
-bool QgsStatusBarScaleWidget::isLocked()
+bool QgsStatusBarScaleWidget::isLocked() const
 {
   return mLockButton->isChecked();
 }
@@ -96,7 +96,7 @@ void QgsStatusBarScaleWidget::updateScales( const QStringList &scales )
   mScale->updateScales( scales );
 }
 
-void QgsStatusBarScaleWidget::userScale()
+void QgsStatusBarScaleWidget::userScale() const
 {
   // Why has MapCanvas the scale inverted?
   mMapCanvas->zoomScale( 1.0 / mScale->scale() );

src/app/qgsstatusbarscalewidget.h

@@ -52,7 +52,7 @@ class APP_EXPORT QgsStatusBarScaleWidget : public QWidget
      * @brief isLocked check if the scale should be locked to use magnifier instead of scale to zoom in/out
      * @return True if the scale shall be locked
      */
-    bool isLocked();
+    bool isLocked() const;
 
     /** Set the font of the text
       * @param font the font to use
@@ -63,7 +63,7 @@ class APP_EXPORT QgsStatusBarScaleWidget : public QWidget
     void updateScales( const QStringList &scales = QStringList() );
 
   private slots:
-    void userScale();
+    void userScale() const;
 
   signals:
     void scaleLockChanged( bool );

src/core/qgsmaprenderercustompainterjob.cpp

@@ -74,7 +74,7 @@ void QgsMapRendererCustomPainterJob::start()
 #ifndef QT_NO_DEBUG
   QPaintDevice* thePaintDevice = mPainter->device();
   QString errMsg = QString( "pre-set DPI not equal to painter's DPI (%1 vs %2)" ).arg( thePaintDevice->logicalDpiX() ).arg( mSettings.outputDpi() );
-  Q_ASSERT_X( thePaintDevice->logicalDpiX() == mSettings.outputDpi(), "Job::startRender()", errMsg.toAscii().data() );
+  Q_ASSERT_X( qgsDoubleNear( thePaintDevice->logicalDpiX(), mSettings.outputDpi() ), "Job::startRender()", errMsg.toAscii().data() );
 #endif
 
   delete mLabelingEngine;