Add field kits for a lot of common field types

python/gui/editorwidgets/core/qgseditorwidgetfactory.sip

@@ -110,19 +110,6 @@ class QgsEditorWidgetFactory
      */
     //virtual QHash<const char*, int> supportedWidgetTypes();
 
-    /**
-     * Create a pretty String representation of the value.
-     *
-     * @param vl        The vector layer.
-     * @param fieldIdx  The index of the field.
-     * @param config    The editor widget config.
-     * @param cache     The editor widget cache.
-     * @param value     The value to represent.
-     *
-     * @return By default the string representation of the provided value as implied by the field definition is returned.
-     */
-    virtual QString representValue( QgsVectorLayer* vl, int fieldIdx, const QgsEditorWidgetConfig& config, const QVariant& cache, const QVariant& value ) const;
-
     /**
      * If the default sort order should be overwritten for this widget, you can transform the value in here.
      *

src/core/CMakeLists.txt

@@ -127,6 +127,8 @@ SET(QGIS_CORE_SRCS
   qgsfeaturestore.cpp
   qgsfield.cpp
   qgsfieldconstraints.cpp
+  qgsfieldkit.cpp
+  qgsfieldkitregistry.cpp
   qgsfields.cpp
   qgsfontutils.cpp
   qgsgeometrycache.cpp
@@ -367,6 +369,14 @@ SET(QGIS_CORE_SRCS
   geometry/qgswkbptr.cpp
   geometry/qgswkbtypes.cpp
 
+
+  fieldkit/qgsdatetimefieldkit.cpp
+  fieldkit/qgskeyvaluefieldkit.cpp
+  fieldkit/qgslistfieldkit.cpp
+  fieldkit/qgsrelationreferencefieldkit.cpp
+  fieldkit/qgsvaluemapfieldkit.cpp
+  fieldkit/qgsvaluerelationfieldkit.cpp
+
   ${CMAKE_CURRENT_BINARY_DIR}/qgscontexthelp_texts.cpp
   ${CMAKE_CURRENT_BINARY_DIR}/qgsexpression_texts.cpp
 )
@@ -659,6 +669,8 @@ SET(QGIS_CORE_HDRS
   qgsfeatureiterator.h
   qgsfeaturerequest.h
   qgsfeaturestore.h
+  qgsfieldkit.h
+  qgsfieldkitregistry.h
   qgsfields.h
   qgsfontutils.h
   qgsgeometrycache.h
@@ -875,6 +887,13 @@ SET(QGIS_CORE_HDRS
   geometry/qgssurface.h
   geometry/qgswkbptr.h
   geometry/qgswkbtypes.h
+
+  fieldkit/qgsdatetimefieldkit.h
+  fieldkit/qgskeyvaluefieldkit.h
+  fieldkit/qgslistfieldkit.h
+  fieldkit/qgsrelationreferencefieldkit.h
+  fieldkit/qgsvaluemapfieldkit.h
+  fieldkit/qgsvaluerelationfieldkit.h
 )
 
 IF (QT_MOBILITY_LOCATION_FOUND OR Qt5Positioning_FOUND)

src/core/fieldkit/qgsdatetimefieldkit.cpp

@@ -0,0 +1,75 @@
+/***************************************************************************
+  qgsdatetimefieldkit.cpp - QgsDateTimeFieldKit
+
+ ---------------------
+ begin                : 2.12.2016
+ copyright            : (C) 2016 by Matthias Kuhn
+ email                : matthias@opengis.ch
+ ***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+#include "qgsdatetimefieldkit.h"
+
+#include <QSettings>
+
+#include "qgsfield.h"
+#include "qgsvectorlayer.h"
+
+QgsDateTimeFieldKit::QgsDateTimeFieldKit()
+{
+
+}
+
+bool QgsDateTimeFieldKit::supportsField( QgsVectorLayer* layer, int fieldIdx )
+{
+}
+
+QString QgsDateTimeFieldKit::representValue( QgsVectorLayer* layer, int fieldIdx, const QVariantMap& config, const QVariant& cache, const QVariant& value ) const
+{
+  Q_UNUSED( cache )
+
+  QString result;
+
+  if ( value.isNull() )
+  {
+    QSettings settings;
+    return settings.value( QStringLiteral( "qgis/nullValue" ), "NULL" ).toString();
+  }
+
+  const QgsField field = layer->fields().at( fieldIdx );
+  const QString displayFormat = config.value( QStringLiteral( "display_format" ), defaultFormat( field.type() ) ).toString();
+  const QString fieldFormat = config.value( QStringLiteral( "field_format" ), defaultFormat( field.type() ) ).toString();
+
+  QDateTime date = QDateTime::fromString( value.toString(), fieldFormat );
+
+  if ( date.isValid() )
+  {
+    result = date.toString( displayFormat );
+  }
+  else
+  {
+    result = value.toString();
+  }
+
+  return result;
+}
+
+QString QgsDateTimeFieldKit::defaultFormat( const QVariant::Type type )
+{
+  switch ( type )
+  {
+    case QVariant::DateTime:
+      return QGSDATETIMEEDIT_DATETIMEFORMAT;
+      break;
+    case QVariant::Time:
+      return QGSDATETIMEEDIT_TIMEFORMAT;
+      break;
+    default:
+      return QGSDATETIMEEDIT_DATEFORMAT;
+  }
+}

src/core/fieldkit/qgsdatetimefieldkit.h

@@ -0,0 +1,41 @@
+/***************************************************************************
+  qgsdatetimefieldkit.h - QgsDateTimeFieldKit
+
+ ---------------------
+ begin                : 2.12.2016
+ copyright            : (C) 2016 by Matthias Kuhn
+ email                : matthias@opengis.ch
+ ***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+#ifndef QGSDATETIMEFIELDKIT_H
+#define QGSDATETIMEFIELDKIT_H
+
+#include "qgsfieldkit.h"
+
+#define QGSDATETIMEEDIT_DATEFORMAT QStringLiteral( "yyyy-MM-dd" )
+#define QGSDATETIMEEDIT_TIMEFORMAT QStringLiteral( "HH:mm:ss" )
+#define QGSDATETIMEEDIT_DATETIMEFORMAT QStringLiteral( "yyyy-MM-dd HH:mm:ss" )
+
+class QgsDateTimeFieldKit : public QgsFieldKit
+{
+  public:
+    QgsDateTimeFieldKit();
+
+    virtual bool supportsField( QgsVectorLayer* layer, int fieldIdx ) override;
+    virtual QString representValue( QgsVectorLayer* layer, int fieldIdx, const QVariantMap& config, const QVariant& cache, const QVariant& value ) const override;
+
+    /**
+     * Get the default format in function of the type
+     * @param type the field type
+     * @return the date/time format
+     */
+    static QString defaultFormat( const QVariant::Type type );
+};
+
+#endif // QGSDATETIMEFIELDKIT_H

src/core/fieldkit/qgskeyvaluefieldkit.cpp

@@ -0,0 +1,46 @@
+/***************************************************************************
+  qgskeyvaluefieldkit.cpp - QgsKeyValueFieldKit
+
+ ---------------------
+ begin                : 3.12.2016
+ copyright            : (C) 2016 by Matthias Kuhn
+ email                : matthias@opengis.ch
+ ***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+#include "qgskeyvaluefieldkit.h"
+
+#include <QSettings>
+
+QgsKeyValueFieldKit::QgsKeyValueFieldKit()
+{
+
+}
+
+QString QgsKeyValueFieldKit::representValue( QgsVectorLayer* vl, int fieldIdx, const QVariantMap& config, const QVariant& cache, const QVariant& value ) const
+{
+  Q_UNUSED( vl );
+  Q_UNUSED( fieldIdx );
+  Q_UNUSED( config );
+  Q_UNUSED( cache );
+
+  if ( value.isNull() )
+  {
+    QSettings settings;
+    return settings.value( QStringLiteral( "qgis/nullValue" ), "NULL" ).toString();
+  }
+
+  QString result;
+  const QVariantMap map = value.toMap();
+  for ( QVariantMap::const_iterator i = map.constBegin(); i != map.constEnd(); ++i )
+  {
+    if ( !result.isEmpty() ) result.append( ", " );
+    result.append( i.key() ).append( ": " ).append( i.value().toString() );
+  }
+  return result;
+}

src/core/fieldkit/qgskeyvaluefieldkit.h

@@ -0,0 +1,29 @@
+/***************************************************************************
+  qgskeyvaluefieldkit.h - QgsKeyValueFieldKit
+
+ ---------------------
+ begin                : 3.12.2016
+ copyright            : (C) 2016 by Matthias Kuhn
+ email                : matthias@opengis.ch
+ ***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+#ifndef QGSKEYVALUEFIELDKIT_H
+#define QGSKEYVALUEFIELDKIT_H
+
+#include "qgsfieldkit.h"
+
+class QgsKeyValueFieldKit : public QgsFieldKit
+{
+  public:
+    QgsKeyValueFieldKit();
+
+    QString representValue( QgsVectorLayer* vl, int fieldIdx, const QVariantMap& config, const QVariant& cache, const QVariant& value ) const override;
+};
+
+#endif // QGSKEYVALUEFIELDKIT_H

src/core/fieldkit/qgslistfieldkit.cpp

@@ -0,0 +1,46 @@
+/***************************************************************************
+  qgslistfieldkit.cpp - QgsListFieldKit
+
+ ---------------------
+ begin                : 3.12.2016
+ copyright            : (C) 2016 by Matthias Kuhn
+ email                : matthias@opengis.ch
+ ***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+#include "qgslistfieldkit.h"
+
+#include <QSettings>
+
+QgsListFieldKit::QgsListFieldKit()
+{
+
+}
+
+QString QgsListFieldKit::representValue( QgsVectorLayer* vl, int fieldIdx, const QVariantMap& config, const QVariant& cache, const QVariant& value ) const
+{
+  Q_UNUSED( vl );
+  Q_UNUSED( fieldIdx );
+  Q_UNUSED( config );
+  Q_UNUSED( cache );
+
+  if ( value.isNull() )
+  {
+    QSettings settings;
+    return settings.value( QStringLiteral( "qgis/nullValue" ), "NULL" ).toString();
+  }
+
+  QString result;
+  const QVariantList list = value.toList();
+  for ( QVariantList::const_iterator i = list.constBegin(); i != list.constEnd(); ++i )
+  {
+    if ( !result.isEmpty() ) result.append( ", " );
+    result.append( i->toString() );
+  }
+  return result;
+}

src/core/fieldkit/qgslistfieldkit.h

@@ -0,0 +1,29 @@
+/***************************************************************************
+  qgslistfieldkit.h - QgsListFieldKit
+
+ ---------------------
+ begin                : 3.12.2016
+ copyright            : (C) 2016 by Matthias Kuhn
+ email                : matthias@opengis.ch
+ ***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+#ifndef QGSLISTFIELDKIT_H
+#define QGSLISTFIELDKIT_H
+
+#include "qgsfieldkit.h"
+
+class QgsListFieldKit : public QgsFieldKit
+{
+  public:
+    QgsListFieldKit();
+
+    QString representValue( QgsVectorLayer* vl, int fieldIdx, const QVariantMap& config, const QVariant& cache, const QVariant& value ) const override;
+};
+
+#endif // QGSLISTFIELDKIT_H