Use a real scale widget in vector save as dialog

src/app/ogr/qgsvectorlayersaveasdialog.cpp

@@ -23,10 +23,12 @@
 #include "qgseditorwidgetfactory.h"
 #include "qgseditorwidgetregistry.h"
 #include "qgssettings.h"
+#include "qgsmapcanvas.h"
 #include "qgsgui.h"
 #include <QMessageBox>
 #include <QFileDialog>
 #include <QTextCodec>
+#include <QSpinBox>
 
 static const int COLUMN_IDX_NAME = 0;
 static const int COLUMN_IDX_TYPE = 1;
@@ -61,7 +63,7 @@ QgsVectorLayerSaveAsDialog::QgsVectorLayerSaveAsDialog( QgsVectorLayer *layer, i
     mSymbologyExportLabel->hide();
     mSymbologyExportComboBox->hide();
     mScaleLabel->hide();
-    mScaleSpinBox->hide();
+    mScaleWidget->hide();
   }
 
   mSelectedOnly->setEnabled( layer && layer->selectedFeatureCount() != 0 );
@@ -814,14 +816,17 @@ int QgsVectorLayerSaveAsDialog::symbologyExport() const
   return mSymbologyExportComboBox->currentData().toInt();
 }
 
-double QgsVectorLayerSaveAsDialog::scaleDenominator() const
+double QgsVectorLayerSaveAsDialog::scale() const
 {
-  return mScaleSpinBox->value();
+  return mScaleWidget->scale();
 }
 
-void QgsVectorLayerSaveAsDialog::setCanvasExtent( const QgsRectangle &canvasExtent, const QgsCoordinateReferenceSystem &canvasCrs )
+void QgsVectorLayerSaveAsDialog::setMapCanvas( QgsMapCanvas *canvas )
 {
-  mExtentGroupBox->setCurrentExtent( canvasExtent, canvasCrs );
+  mMapCanvas = canvas;
+  mScaleWidget->setMapCanvas( canvas );
+  mScaleWidget->setShowCurrentScaleButton( true );
+  mExtentGroupBox->setCurrentExtent( canvas->mapSettings().visibleExtent(), canvas->mapSettings().destinationCrs() );
 }
 
 bool QgsVectorLayerSaveAsDialog::hasFilterExtent() const
@@ -889,7 +894,7 @@ void QgsVectorLayerSaveAsDialog::on_mSymbologyExportComboBox_currentIndexChanged
   {
     scaleEnabled = false;
   }
-  mScaleSpinBox->setEnabled( scaleEnabled );
+  mScaleWidget->setEnabled( scaleEnabled );
   mScaleLabel->setEnabled( scaleEnabled );
 }
 

src/app/ogr/qgsvectorlayersaveasdialog.h

@@ -63,10 +63,17 @@ class APP_EXPORT QgsVectorLayerSaveAsDialog : public QDialog, private Ui::QgsVec
         1: Feature symbology
         2: Symbol level symbology*/
     int symbologyExport() const;
-    double scaleDenominator() const;
 
-    //! setup canvas extent - for the use in extent group box
-    void setCanvasExtent( const QgsRectangle &canvasExtent, const QgsCoordinateReferenceSystem &canvasCrs );
+    /**
+     * Returns the specified map scale.
+     * The scale value indicates the scale denominator, e.g. 1000.0 for a 1:1000 map.
+     */
+    double scale() const;
+
+    /**
+     * Sets a map \a canvas to associate with the dialog.
+     */
+    void setMapCanvas( QgsMapCanvas *canvas );
 
     bool hasFilterExtent() const;
     QgsRectangle filterExtent() const;
@@ -130,6 +137,7 @@ class APP_EXPORT QgsVectorLayerSaveAsDialog : public QDialog, private Ui::QgsVec
     QgsRectangle mLayerExtent;
     QgsCoordinateReferenceSystem mLayerCrs;
     QgsVectorLayer *mLayer = nullptr;
+    QgsMapCanvas *mMapCanvas = nullptr;
     bool mAttributeTableItemChangedSlotEnabled;
     bool mReplaceRawFieldValuesStateChangedSlotEnabled;
     QgsVectorFileWriter::ActionOnExistingFile mActionOnExistingFile;

src/app/qgisapp.cpp

@@ -6776,7 +6776,7 @@ void QgisApp::saveAsVectorFileGeneral( QgsVectorLayer *vlayer, bool symbologyOpt
 
   QgsVectorLayerSaveAsDialog *dialog = new QgsVectorLayerSaveAsDialog( vlayer, options, this );
 
-  dialog->setCanvasExtent( mMapCanvas->mapSettings().visibleExtent(), mMapCanvas->mapSettings().destinationCrs() );
+  dialog->setMapCanvas( mMapCanvas );
   dialog->setIncludeZ( QgsWkbTypes::hasZ( vlayer->wkbType() ) );
 
   if ( dialog->exec() == QDialog::Accepted )
@@ -6835,7 +6835,7 @@ void QgisApp::saveAsVectorFileGeneral( QgsVectorLayer *vlayer, bool symbologyOpt
     options.layerOptions = dialog->layerOptions();
     options.skipAttributeCreation = dialog->selectedAttributes().isEmpty();
     options.symbologyExport = static_cast< QgsVectorFileWriter::SymbologyExport >( dialog->symbologyExport() );
-    options.symbologyScale = dialog->scaleDenominator();
+    options.symbologyScale = dialog->scale();
     if ( dialog->hasFilterExtent() )
       options.filterExtent = filterExtent;
     options.overrideGeometryType = autoGeometryType ? QgsWkbTypes::Unknown : forcedGeometryType;

src/ui/qgsvectorlayersaveasdialogbase.ui

@@ -106,9 +106,9 @@
       <property name="geometry">
        <rect>
         <x>0</x>
-        <y>0</y>
+        <y>-303</y>
         <width>557</width>
-        <height>922</height>
+        <height>1004</height>
        </rect>
       </property>
       <layout class="QVBoxLayout" name="verticalLayout">
@@ -235,15 +235,9 @@
           </widget>
          </item>
          <item>
-          <widget class="QSpinBox" name="mScaleSpinBox">
-           <property name="prefix">
-            <string>1:</string>
-           </property>
-           <property name="maximum">
-            <number>999999999</number>
-           </property>
-           <property name="value">
-            <number>50000</number>
+          <widget class="QgsScaleWidget" name="mScaleWidget" native="true">
+           <property name="focusPolicy">
+            <enum>Qt::StrongFocus</enum>
            </property>
           </widget>
          </item>
@@ -469,6 +463,11 @@
    <header>qgsextentgroupbox.h</header>
    <container>1</container>
   </customwidget>
+  <customwidget>
+   <class>QgsScaleWidget</class>
+   <extends>QWidget</extends>
+   <header>qgsscalewidget.h</header>
+  </customwidget>
  </customwidgets>
  <tabstops>
   <tabstop>mFormatComboBox</tabstop>
@@ -482,15 +481,15 @@
   <tabstop>mSelectAllAttributes</tabstop>
   <tabstop>mDeselectAllAttributes</tabstop>
   <tabstop>mSymbologyExportComboBox</tabstop>
-  <tabstop>mScaleSpinBox</tabstop>
-  <tabstop>mGeometryGroupBox</tabstop>
+  <tabstop>mScaleWidget</tabstop>
   <tabstop>mGeometryTypeComboBox</tabstop>
   <tabstop>mForceMultiCheckBox</tabstop>
   <tabstop>mIncludeZCheckBox</tabstop>
-  <tabstop>mExtentGroupBox</tabstop>
-  <tabstop>mDatasourceOptionsGroupBox</tabstop>
-  <tabstop>mLayerOptionsGroupBox</tabstop>
-  <tabstop>mOgrOptionsGroupBox</tabstop>
+  <tabstop>mAddToCanvas</tabstop>
+  <tabstop>mAttributeTable</tabstop>
+  <tabstop>mReplaceRawFieldValues</tabstop>
+  <tabstop>mOgrDatasourceOptions</tabstop>
+  <tabstop>mOgrLayerOptions</tabstop>
  </tabstops>
  <resources/>
  <connections>