qgsattributeformeditorwidget.h

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/***************************************************************************
    qgsattributeformeditorwidget.h
     -----------------------------
    Date                 : March 2016
    Copyright            : (C) 2016 Nyall Dawson
    Email                : nyall dot dawson at gmail dot com
 ***************************************************************************
 *                                                                         *
 *   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 QGSATTRIBUTEFORMEDITORWIDGET_H
#define QGSATTRIBUTEFORMEDITORWIDGET_H

#include <QWidget>
#include <QVariant>
#include "qgseditorwidgetconfig.h"
#include "qgsattributeeditorcontext.h"
#include "qgssearchwidgetwrapper.h"

class QgsAttributeForm;
class QgsEditorWidgetWrapper;
class QgsMultiEditToolButton;
class QgsSearchWidgetToolButton;
class QgsVectorLayer;
class QStackedWidget;
class QgsAttributeEditorContext;

class GUI_EXPORT QgsAttributeFormEditorWidget : public QWidget
{
    Q_OBJECT

  public:

    enum Mode
    {
      DefaultMode, 
      MultiEditMode, 
      SearchMode, 
    };

    explicit QgsAttributeFormEditorWidget( QgsEditorWidgetWrapper* editorWidget,
                                           QgsAttributeForm* form );

    ~QgsAttributeFormEditorWidget();

    void createSearchWidgetWrappers( const QString& widgetId, int fieldIdx,
                                     const QgsEditorWidgetConfig& config,
                                     const QgsAttributeEditorContext &context = QgsAttributeEditorContext() );

    void setMode( Mode mode );

    Mode mode() const { return mMode; }

    void initialize( const QVariant& initialValue, bool mixedValues = false );

    bool hasChanged() const { return mIsChanged; }

    QVariant currentValue() const;

    QString currentFilterExpression() const;

  public slots:

    void setIsMixed( bool mixed );

    void changesCommitted();

    void resetSearch();

  signals:

    void valueChanged( const QVariant& value );

  private slots:

    void editorWidgetChanged( const QVariant& value );

    void resetValue();

    void setFieldTriggered();

    void searchWidgetFlagsChanged( QgsSearchWidgetWrapper::FilterFlags flags );

  protected:

    QgsSearchWidgetToolButton* searchWidgetToolButton();

    void setSearchWidgetWrapper( QgsSearchWidgetWrapper* wrapper );

    QWidget* searchWidgetFrame();

    QList< QgsSearchWidgetWrapper* > searchWidgetWrappers();

  private:

    QWidget* mEditPage;
    QWidget* mSearchPage;
    QStackedWidget* mStack;
    QWidget* mSearchFrame;

    QgsEditorWidgetWrapper* mWidget;
    QList< QgsSearchWidgetWrapper* > mSearchWidgets;
    QgsAttributeForm* mForm;
    Mode mMode;

    QgsMultiEditToolButton* mMultiEditButton;
    QgsSearchWidgetToolButton* mSearchWidgetToolButton;
    QVariant mPreviousValue;
    bool mBlockValueUpdate;
    bool mIsMixed;
    bool mIsChanged;


    QgsVectorLayer* layer();
    void updateWidgets();
};

#endif // QGSATTRIBUTEFORMEDITORWIDGET_H