qgsdiagramproperties.h

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/***************************************************************************
  qgsdiagramproperties.h
  Properties for diagram layers
  -------------------
         begin                : August 2012
         copyright            : (C) Matthias Kuhn
         email                : matthias at opengis dot 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 QGSDIAGRAMPROPERTIES_H
#define QGSDIAGRAMPROPERTIES_H
 
// We don't want to expose this in the public API
#define SIP_NO_FILE
 
#include "ui_qgsdiagrampropertiesbase.h"
 
#include "qgis_gui.h"
#include "qgscolorschemelist.h"
#include "qgsdiagramrenderer.h"
#include "qgswidgetwrapper.h"
 
#include <QDialog>
#include <QStyledItemDelegate>
 
class QgsVectorLayer;
class QgsMapCanvas;

class GUI_EXPORT QgsDiagramProperties : public QgsPanelWidget, private Ui::QgsDiagramPropertiesBase, private QgsExpressionContextGenerator
{
    Q_OBJECT
 
  public:
    QgsDiagramProperties( QgsVectorLayer *layer, QWidget *parent, QgsMapCanvas *canvas );
    ~QgsDiagramProperties() override;

    void syncToLayer();

    void syncToRenderer( const QgsDiagramRenderer *dr );

    void syncToSettings( const QgsDiagramLayerSettings *dls );

    void addAttribute( QTreeWidgetItem *item );

    void setDockMode( bool dockMode ) override;

    void setDiagramType( const QString diagramType );

    void setAllowedToEditDiagramLayerSettings( bool allowed );

    bool isAllowedToEditDiagramLayerSettings() const;
 
  signals:
 
    void auxiliaryFieldCreated();
 
  public slots:
    void apply();
    void mDiagramTypeComboBox_currentIndexChanged( int index );
    void mAddCategoryPushButton_clicked();
    void mAttributesTreeWidget_itemDoubleClicked( QTreeWidgetItem *item, int column );
    void mFindMaximumValueButton_clicked();
    void mRemoveCategoryPushButton_clicked();
    void mDiagramAttributesTreeWidget_itemDoubleClicked( QTreeWidgetItem *item, int column );
    void showAddAttributeExpressionDialog();
    void mDiagramStackedWidget_currentChanged( int index );
    void updatePlacementWidgets();
    void scalingTypeChanged();
    void showSizeLegendDialog();
 
  private slots:
 
    void updateProperty();
    void showHelp();
 
    void createAuxiliaryField();
 
  private:
    QgsVectorLayer *mLayer = nullptr;
    QButtonGroup *mPlacePointBtnGrp = nullptr;
    QButtonGroup *mPlaceLineBtnGrp = nullptr;
    QButtonGroup *mPlacePolygonBtnGrp = nullptr;
 
    std::unique_ptr<QgsPaintEffect> mPaintEffect;
 
    enum Columns
    {
      ColumnAttributeExpression = 0,
      ColumnColor,
      ColumnLegendText,
    };
 
    enum Roles
    {
      RoleAttributeExpression = Qt::UserRole,
    };
 
    QString showExpressionBuilder( const QString &initialExpression );
 
    QgsPropertyCollection mDataDefinedProperties;
 
    // Keeps track of the diagram type to properly save / restore settings when the diagram type combo box is set to no diagram.
    QString mDiagramType;
    std::unique_ptr<QgsDataDefinedSizeLegend> mSizeLegend;
 
    QString guessLegendText( const QString &expression );
    QgsMapCanvas *mMapCanvas = nullptr;
 
    QgsExpressionContext createExpressionContext() const override;
 
    bool mAllowedToEditDls = true;
 
    void registerDataDefinedButton( QgsPropertyOverrideButton *button, QgsDiagramLayerSettings::Property key );

    void connectValueChanged( const QList<QWidget *> &widgets );

    std::unique_ptr<QgsDiagram> createDiagramObject();

    std::unique_ptr<QgsDiagramSettings> createDiagramSettings();

    std::unique_ptr<QgsDiagramRenderer> createRenderer();

    QgsDiagramLayerSettings createDiagramLayerSettings();

    void insertDefaults();

    void updateDataDefinedButtons();

    void updateDataDefinedButton( QgsPropertyOverrideButton *button );

    void setDiagramEnabled( const bool enabled );

    bool isDiagramEnabled() const;
 
    friend class QgsStackedDiagramProperties;
    friend class QgsStackedDiagramPropertiesDialog;
    friend class TestQgsDiagramProperties;
};
 

class EditBlockerDelegate : public QStyledItemDelegate
{
    Q_OBJECT
  public:
    EditBlockerDelegate( QObject *parent = nullptr )
      : QStyledItemDelegate( parent )
    {}
 
    QWidget *createEditor( QWidget *, const QStyleOptionViewItem &, const QModelIndex & ) const override
    {
      return nullptr;
    }
};
 
 
#endif // QGSDIAGRAMPROPERTIES_H