[FEATURE][layouts] Use text renderer for drawing scalebar text

Allows the full range of formatting options exposed through text renderer - e.g. scalebar text with buffers, shadows, background shapes, letter spacing, etc. Say goodbye to unreadable scale bar text!
qgis · May 11, 2018 · 9d2c4fca1986a144f4e1cc8ada8a4450acb47e59 · 9d2c4fc
1 parent a06000e
commit 9d2c4fca1986a144f4e1cc8ada8a4450acb47e59
diff --git a/python/core/layout/qgslayoutitemscalebar.sip.in b/python/core/layout/qgslayoutitemscalebar.sip.in
@@ -192,36 +192,62 @@ Sets the ``label`` for units.
 .. seealso:: :py:func:`unitLabel`
 %End
 
-    QFont font() const;
+    QgsTextFormat textFormat() const;
+%Docstring
+Returns the text format used for drawing text in the scalebar.
+
+.. seealso:: :py:func:`setTextFormat`
+
+.. versionadded:: 3.2
+%End
+
+    void setTextFormat( const QgsTextFormat &format );
+%Docstring
+Sets the text ``format`` used for drawing text in the scalebar.
+
+.. seealso:: :py:func:`textFormat`
+
+.. versionadded:: 3.2
+%End
+
+ QFont font() const /Deprecated/;
 %Docstring
 Returns the font used for drawing text in the scalebar.
 
 .. seealso:: :py:func:`setFont`
+
+.. deprecated:: use textFormat() instead
 %End
 
-    void setFont( const QFont &font );
+ void setFont( const QFont &font ) /Deprecated/;
 %Docstring
 Sets the ``font`` used for drawing text in the scalebar.
 
-.. seealso:: :py:func:`setFont`
+.. seealso:: :py:func:`font`
+
+.. deprecated:: use setTextFormat() instead
 %End
 
-    QColor fontColor() const;
+ QColor fontColor() const /Deprecated/;
 %Docstring
 Returns the color used for drawing text in the scalebar.
 
 .. seealso:: :py:func:`setFontColor`
 
 .. seealso:: :py:func:`font`
+
+.. deprecated:: use textFormat() instead
 %End
 
-    void setFontColor( const QColor &color );
+ void setFontColor( const QColor &color ) /Deprecated/;
 %Docstring
 Sets the ``color`` used for drawing text in the scalebar.
 
 .. seealso:: :py:func:`fontColor`
 
 .. seealso:: :py:func:`setFont`
+
+.. deprecated:: use setTextFormat() instead
 %End
 
     QColor fillColor() const;

diff --git a/python/core/scalebar/qgsscalebarrenderer.sip.in b/python/core/scalebar/qgsscalebarrenderer.sip.in
@@ -74,9 +74,18 @@ Draws default scalebar labels using the specified ``settings`` and ``scaleContex
 Returns the text used for the first label in the scalebar.
 %End
 
-    double firstLabelXOffset( const QgsScaleBarSettings &settings ) const;
+ double firstLabelXOffset( const QgsScaleBarSettings &settings ) const /Deprecated/;
 %Docstring
 Returns the x-offset (in millimeters) used for the first label in the scalebar.
+
+.. deprecated:: Use the version with QgsRenderContext instead.
+%End
+
+    double firstLabelXOffset( const QgsScaleBarSettings &settings, const QgsRenderContext &context ) const;
+%Docstring
+Returns the x-offset (in render context painter units) used for the first label in the scalebar.
+
+.. versionadded:: 3.2
 %End
 
     QList<double> segmentPositions( const QgsScaleBarRenderer::ScaleBarContext &scaleContext, const QgsScaleBarSettings &settings ) const;

diff --git a/python/core/scalebar/qgsscalebarsettings.sip.in b/python/core/scalebar/qgsscalebarsettings.sip.in
@@ -206,36 +206,63 @@ Sets the ``label`` for units.
 .. seealso:: :py:func:`unitLabel`
 %End
 
-    QFont font() const;
+    QgsTextFormat &textFormat();
+%Docstring
+Returns the text format used for drawing text in the scalebar.
+
+.. seealso:: :py:func:`setTextFormat`
+
+.. versionadded:: 3.2
+%End
+
+
+    void setTextFormat( const QgsTextFormat &format );
+%Docstring
+Sets the text ``format`` used for drawing text in the scalebar.
+
+.. seealso:: :py:func:`textFormat`
+
+.. versionadded:: 3.2
+%End
+
+ QFont font() const /Deprecated/;
 %Docstring
 Returns the font used for drawing text in the scalebar.
 
 .. seealso:: :py:func:`setFont`
+
+.. deprecated:: use textFormat() instead
 %End
 
-    void setFont( const QFont &font );
+ void setFont( const QFont &font ) /Deprecated/;
 %Docstring
 Sets the ``font`` used for drawing text in the scalebar.
 
-.. seealso:: :py:func:`setFont`
+.. seealso:: :py:func:`font`
+
+.. deprecated:: use setTextFormat() instead
 %End
 
-    QColor fontColor() const;
+ QColor fontColor() const /Deprecated/;
 %Docstring
 Returns the color used for drawing text in the scalebar.
 
 .. seealso:: :py:func:`setFontColor`
 
 .. seealso:: :py:func:`font`
+
+.. deprecated:: use textFormat() instead
 %End
 
-    void setFontColor( const QColor &color );
+ void setFontColor( const QColor &color ) /Deprecated/;
 %Docstring
 Sets the ``color`` used for drawing text in the scalebar.
 
 .. seealso:: :py:func:`fontColor`
 
 .. seealso:: :py:func:`setFont`
+
+.. deprecated:: use textFormat() instead
 %End
 
     QColor fillColor() const;

diff --git a/python/plugins/processing/tests/testdata/custom/circular_strings.gpkg b/python/plugins/processing/tests/testdata/custom/circular_strings.gpkg
diff --git a/src/app/layout/qgslayoutscalebarwidget.cpp b/src/app/layout/qgslayoutscalebarwidget.cpp
@@ -36,7 +36,6 @@ QgsLayoutScaleBarWidget::QgsLayoutScaleBarWidget( QgsLayoutItemScaleBar *scaleBa
   connect( mNumberOfSegmentsSpinBox, static_cast < void ( QSpinBox::* )( int ) > ( &QSpinBox::valueChanged ), this, &QgsLayoutScaleBarWidget::mNumberOfSegmentsSpinBox_valueChanged );
   connect( mUnitLabelLineEdit, &QLineEdit::textChanged, this, &QgsLayoutScaleBarWidget::mUnitLabelLineEdit_textChanged );
   connect( mMapUnitsPerBarUnitSpinBox, static_cast < void ( QDoubleSpinBox::* )( double ) > ( &QDoubleSpinBox::valueChanged ), this, &QgsLayoutScaleBarWidget::mMapUnitsPerBarUnitSpinBox_valueChanged );
-  connect( mFontColorButton, &QgsColorButton::colorChanged, this, &QgsLayoutScaleBarWidget::mFontColorButton_colorChanged );
   connect( mFillColorButton, &QgsColorButton::colorChanged, this, &QgsLayoutScaleBarWidget::mFillColorButton_colorChanged );
   connect( mFillColor2Button, &QgsColorButton::colorChanged, this, &QgsLayoutScaleBarWidget::mFillColor2Button_colorChanged );
   connect( mStrokeColorButton, &QgsColorButton::colorChanged, this, &QgsLayoutScaleBarWidget::mStrokeColorButton_colorChanged );
@@ -101,9 +100,8 @@ QgsLayoutScaleBarWidget::QgsLayoutScaleBarWidget( QgsLayoutItemScaleBar *scaleBa
   mFillColor2Button->setNoColorString( tr( "Transparent fill" ) );
   mFillColor2Button->setShowNoColor( true );
 
-  mFontColorButton->setColorDialogTitle( tr( "Select Font Color" ) );
-  mFontColorButton->setAllowOpacity( true );
-  mFontColorButton->setContext( QStringLiteral( "composer" ) );
+  mFontButton->setDialogTitle( tr( "Scalebar Font" ) );
+  mFontButton->setMode( QgsFontButton::ModeTextRenderer );
 
   mStrokeColorButton->setColorDialogTitle( tr( "Select Line Color" ) );
   mStrokeColorButton->setAllowOpacity( true );
@@ -135,7 +133,7 @@ QgsLayoutScaleBarWidget::QgsLayoutScaleBarWidget( QgsLayoutItemScaleBar *scaleBa
   blockMemberSignals( false );
   setGuiElements(); //set the GUI elements to the state of scaleBar
 
-  connect( mFontButton, &QgsFontButton::changed, this, &QgsLayoutScaleBarWidget::fontChanged );
+  connect( mFontButton, &QgsFontButton::changed, this, &QgsLayoutScaleBarWidget::textFormatChanged );
 }
 
 bool QgsLayoutScaleBarWidget::setNewItem( QgsLayoutItem *item )
@@ -181,11 +179,10 @@ void QgsLayoutScaleBarWidget::setGuiElements()
   mUnitLabelLineEdit->setText( mScalebar->unitLabel() );
   mLineJoinStyleCombo->setPenJoinStyle( mScalebar->lineJoinStyle() );
   mLineCapStyleCombo->setPenCapStyle( mScalebar->lineCapStyle() );
-  mFontColorButton->setColor( mScalebar->fontColor() );
   mFillColorButton->setColor( mScalebar->fillColor() );
   mFillColor2Button->setColor( mScalebar->fillColor2() );
   mStrokeColorButton->setColor( mScalebar->lineColor() );
-  mFontButton->setCurrentFont( mScalebar->font() );
+  mFontButton->setTextFormat( mScalebar->textFormat() );
 
   //map combo box
   mMapItemComboBox->setItem( mScalebar->linkedMap() );
@@ -196,7 +193,7 @@ void QgsLayoutScaleBarWidget::setGuiElements()
   toggleStyleSpecificControls( style );
 
   //alignment
-  mAlignmentComboBox->setCurrentIndex( ( int )( mScalebar->alignment() ) );
+  mAlignmentComboBox->setCurrentIndex( static_cast< int >( mScalebar->alignment() ) );
 
   //units
   mUnitsComboBox->setCurrentIndex( mUnitsComboBox->findData( static_cast< int >( mScalebar->units() ) ) );
@@ -300,7 +297,7 @@ void QgsLayoutScaleBarWidget::mHeightSpinBox_valueChanged( double d )
   mScalebar->endCommand();
 }
 
-void QgsLayoutScaleBarWidget::fontChanged()
+void QgsLayoutScaleBarWidget::textFormatChanged()
 {
   if ( !mScalebar )
   {
@@ -309,27 +306,12 @@ void QgsLayoutScaleBarWidget::fontChanged()
 
   mScalebar->beginCommand( tr( "Set Scalebar Font" ) );
   disconnectUpdateSignal();
-  mScalebar->setFont( mFontButton->currentFont() );
+  mScalebar->setTextFormat( mFontButton->textFormat() );
   connectUpdateSignal();
   mScalebar->endCommand();
   mScalebar->update();
 }
 
-void QgsLayoutScaleBarWidget::mFontColorButton_colorChanged( const QColor &newColor )
-{
-  if ( !mScalebar )
-  {
-    return;
-  }
-
-  mScalebar->beginCommand( tr( "Set Scalebar Font Color" ), QgsLayoutItem::UndoScaleBarFontColor );
-  disconnectUpdateSignal();
-  mScalebar->setFontColor( newColor );
-  mScalebar->update();
-  connectUpdateSignal();
-  mScalebar->endCommand();
-}
-
 void QgsLayoutScaleBarWidget::mFillColorButton_colorChanged( const QColor &newColor )
 {
   if ( !mScalebar )
@@ -535,7 +517,7 @@ void QgsLayoutScaleBarWidget::mAlignmentComboBox_currentIndexChanged( int index
 
   mScalebar->beginCommand( tr( "Set Scalebar Alignment" ) );
   disconnectUpdateSignal();
-  mScalebar->setAlignment( ( QgsScaleBarSettings::Alignment ) index );
+  mScalebar->setAlignment( static_cast< QgsScaleBarSettings::Alignment >( index ) );
   mScalebar->update();
   connectUpdateSignal();
   mScalebar->endCommand();
@@ -583,7 +565,6 @@ void QgsLayoutScaleBarWidget::blockMemberSignals( bool block )
   mUnitsComboBox->blockSignals( block );
   mLineJoinStyleCombo->blockSignals( block );
   mLineCapStyleCombo->blockSignals( block );
-  mFontColorButton->blockSignals( block );
   mFillColorButton->blockSignals( block );
   mFillColor2Button->blockSignals( block );
   mStrokeColorButton->blockSignals( block );

diff --git a/src/app/layout/qgslayoutscalebarwidget.h b/src/app/layout/qgslayoutscalebarwidget.h
@@ -48,7 +48,6 @@ class QgsLayoutScaleBarWidget: public QgsLayoutItemBaseWidget, private Ui::QgsLa
     void mNumberOfSegmentsSpinBox_valueChanged( int i );
     void mUnitLabelLineEdit_textChanged( const QString &text );
     void mMapUnitsPerBarUnitSpinBox_valueChanged( double d );
-    void mFontColorButton_colorChanged( const QColor &newColor );
     void mFillColorButton_colorChanged( const QColor &newColor );
     void mFillColor2Button_colorChanged( const QColor &newColor );
     void mStrokeColorButton_colorChanged( const QColor &newColor );
@@ -66,7 +65,7 @@ class QgsLayoutScaleBarWidget: public QgsLayoutItemBaseWidget, private Ui::QgsLa
     void setGuiElements();
     void segmentSizeRadioChanged( QAbstractButton *radio );
     void mapChanged( QgsLayoutItem *item );
-    void fontChanged();
+    void textFormatChanged();
 
   private:
     QPointer< QgsLayoutItemScaleBar > mScalebar;

diff --git a/src/app/qgsdecorationscalebar.cpp b/src/app/qgsdecorationscalebar.cpp
@@ -85,17 +85,31 @@ void QgsDecorationScaleBar::projectRead()
 
   QDomDocument doc;
   QDomElement elem;
-  QString fontXml = QgsProject::instance()->readEntry( mNameConfig, QStringLiteral( "/Font" ) );
-  if ( !fontXml.isEmpty() )
+  QString textFormatXml = QgsProject::instance()->readEntry( mNameConfig, QStringLiteral( "/TextFormat" ) );
+  if ( !textFormatXml.isEmpty() )
   {
-    doc.setContent( fontXml );
+    doc.setContent( textFormatXml );
     elem = doc.documentElement();
-    QgsDebugMsg( doc.toString() );
-    QgsFontUtils::setFromXmlElement( mFont, elem );
+    QgsReadWriteContext context;
+    context.setPathResolver( QgsProject::instance()->pathResolver() );
+    mTextFormat.readXml( elem, context );
   }
   else
   {
-    mFont = QFont();
+    QString fontXml = QgsProject::instance()->readEntry( mNameConfig, QStringLiteral( "/Font" ) );
+    if ( !fontXml.isEmpty() )
+    {
+      doc.setContent( fontXml );
+      elem = doc.documentElement();
+      QFont font;
+      QgsFontUtils::setFromXmlElement( font, elem );
+      mTextFormat = QgsTextFormat::fromQFont( font );
+      mTextFormat.setColor( mColor );
+    }
+    else
+    {
+      mTextFormat = QgsTextFormat();
+    }
   }
 
   setupScaleBar();
@@ -113,9 +127,12 @@ void QgsDecorationScaleBar::saveToProject()
   QgsProject::instance()->writeEntry( mNameConfig, QStringLiteral( "/MarginV" ), mMarginVertical );
 
   QDomDocument fontDoc;
-  QDomElement font = QgsFontUtils::toXmlElement( mFont, fontDoc, QStringLiteral( "BarFont" ) );
-  fontDoc.appendChild( font );
-  QgsProject::instance()->writeEntry( mNameConfig, QStringLiteral( "/Font" ), fontDoc.toString() );
+  QgsReadWriteContext context;
+  context.setPathResolver( QgsProject::instance()->pathResolver() );
+  QDomElement textElem = mTextFormat.writeXml( fontDoc, context );
+  fontDoc.appendChild( textElem );
+
+  QgsProject::instance()->writeEntry( mNameConfig, QStringLiteral( "/TextFormat" ), fontDoc.toString() );
 }
 
 
@@ -127,6 +144,7 @@ void QgsDecorationScaleBar::run()
 
 void QgsDecorationScaleBar::setupScaleBar()
 {
+  mSettings.setTextFormat( mTextFormat );
   switch ( mStyleIndex )
   {
     case 0:
@@ -137,8 +155,6 @@ void QgsDecorationScaleBar::setupScaleBar()
       mStyle = std::move( tickStyle );
       mSettings.setFillColor( mColor );
       mSettings.setLineColor( mColor ); // Compatibility with pre 3.2 configuration
-      mSettings.setFont( mFont );
-      mSettings.setFontColor( mColor );
       mSettings.setHeight( 2.2 );
       mSettings.setLineWidth( 0.3 );
       break;
@@ -149,8 +165,6 @@ void QgsDecorationScaleBar::setupScaleBar()
       mSettings.setFillColor( mColor );
       mSettings.setFillColor2( QColor( "transparent" ) );
       mSettings.setLineColor( mOutlineColor );
-      mSettings.setFont( mFont );
-      mSettings.setFontColor( mColor );
       mSettings.setHeight( mStyleIndex == 2 ? 1 : 3 );
       mSettings.setLineWidth( mStyleIndex == 2 ? 0.2 : 0.3 );
       break;

diff --git a/src/app/qgsdecorationscalebar.h b/src/app/qgsdecorationscalebar.h
@@ -64,8 +64,8 @@ class APP_EXPORT QgsDecorationScaleBar: public QgsDecorationItem
     QColor mColor;
     //! The scale bar otuline color
     QColor mOutlineColor;
-    //! The scale bar font
-    QFont mFont;
+
+    QgsTextFormat mTextFormat;
 
     QgsScaleBarSettings mSettings;
 

diff --git a/src/app/qgsdecorationscalebardialog.cpp b/src/app/qgsdecorationscalebardialog.cpp
@@ -84,8 +84,8 @@ QgsDecorationScaleBarDialog::QgsDecorationScaleBarDialog( QgsDecorationScaleBar
   pbnChangeOutlineColor->setContext( QStringLiteral( "gui" ) );
   pbnChangeOutlineColor->setColorDialogTitle( tr( "Select Scale Bar Outline Color" ) );
 
-  mButtonFontStyle->setMode( QgsFontButton::ModeQFont );
-  mButtonFontStyle->setCurrentFont( mDeco.mFont );
+  mButtonFontStyle->setMode( QgsFontButton::ModeTextRenderer );
+  mButtonFontStyle->setTextFormat( mDeco.mTextFormat );
 }
 
 QgsDecorationScaleBarDialog::~QgsDecorationScaleBarDialog()
@@ -111,7 +111,7 @@ void QgsDecorationScaleBarDialog::apply()
   mDeco.mStyleIndex = cboStyle->currentIndex();
   mDeco.mColor = pbnChangeColor->color();
   mDeco.mOutlineColor = pbnChangeOutlineColor->color();
-  mDeco.mFont = mButtonFontStyle->currentFont();
+  mDeco.mTextFormat = mButtonFontStyle->textFormat();
   mDeco.setupScaleBar();
   mDeco.update();
 }