allow defining fields directly in the new scratch layer dialog (fix #…

…24397)
qgis · May 9, 2020 · 65dfb22 · 65dfb22
1 parent 61f1566
commit 65dfb22
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Showing 4 changed files with 307 additions and 64 deletions.
diff --git a/python/gui/auto_generated/qgsnewmemorylayerdialog.sip.in b/python/gui/auto_generated/qgsnewmemorylayerdialog.sip.in
@@ -56,6 +56,13 @@ Returns the selected CRS for the new layer.
     QString layerName() const;
 %Docstring
 Returns the layer name
+%End
+
+    QgsFields fields() const;
+%Docstring
+Returns attributes for the new layer.
+
+.. versionadded:: 3.14
 %End
 
 };

diff --git a/src/gui/qgsnewmemorylayerdialog.cpp b/src/gui/qgsnewmemorylayerdialog.cpp
@@ -22,6 +22,8 @@
 #include "qgsproviderregistry.h"
 #include "qgsvectordataprovider.h"
 #include "qgsvectorlayer.h"
+#include "qgsfield.h"
+#include "qgsfields.h"
 #include "qgssettings.h"
 #include "qgsmemoryproviderutils.h"
 #include "qgsgui.h"
@@ -41,8 +43,9 @@ QgsVectorLayer *QgsNewMemoryLayerDialog::runAndCreateLayer( QWidget *parent, con
   }
 
   QgsWkbTypes::Type geometrytype = dialog.selectedType();
+  QgsFields fields = dialog.fields();
   QString name = dialog.layerName().isEmpty() ? tr( "New scratch layer" ) : dialog.layerName();
-  QgsVectorLayer *newLayer = QgsMemoryProviderUtils::createMemoryLayer( name, QgsFields(), geometrytype, dialog.crs() );
+  QgsVectorLayer *newLayer = QgsMemoryProviderUtils::createMemoryLayer( name, fields, geometrytype, dialog.crs() );
   return newLayer;
 }
 
@@ -52,6 +55,8 @@ QgsNewMemoryLayerDialog::QgsNewMemoryLayerDialog( QWidget *parent, Qt::WindowFla
   setupUi( this );
   QgsGui::enableAutoGeometryRestore( this );
 
+  mNameLineEdit->setText( tr( "New scratch layer" ) );
+
   mGeometryTypeBox->addItem( QgsApplication::getThemeIcon( QStringLiteral( "/mIconTableLayer.svg" ) ), tr( "No geometry" ), QgsWkbTypes::NoGeometry );
   mGeometryTypeBox->addItem( QgsApplication::getThemeIcon( QStringLiteral( "/mIconPointLayer.svg" ) ), tr( "Point" ), QgsWkbTypes::Point );
   mGeometryTypeBox->addItem( QgsApplication::getThemeIcon( QStringLiteral( "/mIconLineLayer.svg" ) ), tr( "LineString / CompoundCurve" ), QgsWkbTypes::LineString );
@@ -63,9 +68,22 @@ QgsNewMemoryLayerDialog::QgsNewMemoryLayerDialog( QWidget *parent, Qt::WindowFla
   mGeometryWithZCheckBox->setEnabled( false );
   mGeometryWithMCheckBox->setEnabled( false );
 
-  mNameLineEdit->setText( tr( "New scratch layer" ) );
+  mTypeBox->addItem( QgsApplication::getThemeIcon( QStringLiteral( "/mIconFieldText.svg" ) ), tr( "Text" ), "string" );
+  mTypeBox->addItem( QgsApplication::getThemeIcon( QStringLiteral( "/mIconFieldInteger.svg" ) ), tr( "Whole number" ), "integer" );
+  mTypeBox->addItem( QgsApplication::getThemeIcon( QStringLiteral( "/mIconFieldFloat.svg" ) ), tr( "Decimal number" ), "double" );
+  mTypeBox->addItem( QgsApplication::getThemeIcon( QStringLiteral( "/mIconFieldBool.svg" ) ), tr( "Boolean" ), "bool" );
+  mTypeBox->addItem( QgsApplication::getThemeIcon( QStringLiteral( "/mIconFieldDate.svg" ) ), tr( "Date" ), "date" );
+  mTypeBox->addItem( QgsApplication::getThemeIcon( QStringLiteral( "/mIconFieldTime.svg" ) ), tr( "Time" ), "time" );
+  mTypeBox->addItem( QgsApplication::getThemeIcon( QStringLiteral( "/mIconFieldDateTime.svg" ) ), tr( "Date & time" ), "datetime" );
+
+  mWidth->setValidator( new QIntValidator( 1, 255, this ) );
+  mPrecision->setValidator( new QIntValidator( 0, 15, this ) );
 
   connect( mGeometryTypeBox, static_cast<void ( QComboBox::* )( int )>( &QComboBox::currentIndexChanged ), this, &QgsNewMemoryLayerDialog::geometryTypeChanged );
+  connect( mFieldNameEdit, &QLineEdit::textChanged, this, &QgsNewMemoryLayerDialog::fieldNameChanged );
+  connect( mAttributeView, &QTreeWidget::itemSelectionChanged, this, &QgsNewMemoryLayerDialog::selectionChanged );
+  connect( mAddAttributeButton, &QToolButton::clicked, this, &QgsNewMemoryLayerDialog::mAddAttributeButton_clicked );
+  connect( mRemoveAttributeButton, &QToolButton::clicked, this, &QgsNewMemoryLayerDialog::mRemoveAttributeButton_clicked );
   connect( mButtonBox, &QDialogButtonBox::helpRequested, this, &QgsNewMemoryLayerDialog::showHelp );
   geometryTypeChanged( mGeometryTypeBox->currentIndex() );
 }
@@ -113,6 +131,70 @@ QString QgsNewMemoryLayerDialog::layerName() const
   return mNameLineEdit->text();
 }
 
+void QgsNewMemoryLayerDialog::fieldNameChanged( const QString &name )
+{
+  mAddAttributeButton->setDisabled( name.isEmpty() || ! mAttributeView->findItems( name, Qt::MatchExactly ).isEmpty() );
+}
+
+void QgsNewMemoryLayerDialog::selectionChanged()
+{
+  mRemoveAttributeButton->setDisabled( mAttributeView->selectedItems().isEmpty() );
+}
+
+QgsFields QgsNewMemoryLayerDialog::fields() const
+{
+  QgsFields fields = QgsFields();
+
+  QTreeWidgetItemIterator it( mAttributeView );
+  while ( *it )
+  {
+    QString name( ( *it )->text( 0 ) );
+    QString typeName( ( *it )->text( 1 ) );
+    int width = ( *it )->text( 2 ).toInt();
+    int precision = ( *it )->text( 3 ).toInt();
+    QVariant::Type fieldType = QVariant::Invalid;
+    if ( typeName == QLatin1String( "string" ) )
+      fieldType = QVariant::String;
+    else if ( typeName == QLatin1String( "integer" ) )
+      fieldType = QVariant::Int;
+    else if ( typeName == QLatin1String( "double" ) )
+      fieldType = QVariant::Double;
+    else if ( typeName == QLatin1String( "bool" ) )
+      fieldType = QVariant::Bool;
+    else if ( typeName == QLatin1String( "date" ) )
+      fieldType = QVariant::Date;
+    else if ( typeName == QLatin1String( "time" ) )
+      fieldType = QVariant::Time;
+    else if ( typeName == QLatin1String( "datetime" ) )
+      fieldType = QVariant::DateTime;
+
+    QgsField field = QgsField( name, fieldType, typeName, width, precision );
+    fields.append( field );
+    ++it;
+  }
+
+  return fields;
+}
+
+void QgsNewMemoryLayerDialog::mAddAttributeButton_clicked()
+{
+  if ( !mFieldNameEdit->text().isEmpty() )
+  {
+    QString fieldName = mFieldNameEdit->text();
+    QString fieldType = mTypeBox->currentData( Qt::UserRole ).toString();
+    QString width = mWidth->text();
+    QString precision = mPrecision->text();
+    mAttributeView->addTopLevelItem( new QTreeWidgetItem( QStringList() << fieldName << fieldType << width << precision ) );
+
+    mFieldNameEdit->clear();
+  }
+}
+
+void QgsNewMemoryLayerDialog::mRemoveAttributeButton_clicked()
+{
+  delete mAttributeView->currentItem();
+}
+
 void QgsNewMemoryLayerDialog::showHelp()
 {
   QgsHelp::openHelp( QStringLiteral( "managing_data_source/create_layers.html#creating-a-new-temporary-scratch-layer" ) );

diff --git a/src/gui/qgsnewmemorylayerdialog.h b/src/gui/qgsnewmemorylayerdialog.h
@@ -23,6 +23,7 @@
 #include "qgshelp.h"
 #include "qgis_gui.h"
 
+class QgsFields;
 class QgsVectorLayer;
 
 /**
@@ -67,13 +68,23 @@ class GUI_EXPORT QgsNewMemoryLayerDialog: public QDialog, private Ui::QgsNewMemo
     //! Returns the layer name
     QString layerName() const;
 
+    /**
+     * Returns attributes for the new layer.
+     * \since QGIS 3.14
+     */
+    QgsFields fields() const;
+
   private:
 
     QString mCrsId;
 
   private slots:
 
     void geometryTypeChanged( int index );
+    void fieldNameChanged( const QString & );
+    void mAddAttributeButton_clicked();
+    void mRemoveAttributeButton_clicked();
+    void selectionChanged();
     void showHelp();
 };