qgsgraduatedsymbolrendererwidget.h

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/***************************************************************************
    qgsgraduatedsymbolrendererwidget.h
    ---------------------
    begin                : December 2009
    copyright            : (C) 2009 by Martin Dobias
    email                : wonder dot sk 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 QGSGRADUATEDSYMBOLRENDERERWIDGET_H
#define QGSGRADUATEDSYMBOLRENDERERWIDGET_H
 
#include <QStandardItem>
 
 
#include "qgsgraduatedsymbolrenderer.h"
#include "qgis_sip.h"
#include "qgsrendererwidget.h"
#include "qgsproxystyle.h"
#include "qgsprocessingwidgetwrapper.h"
#include "qgsdoublevalidator.h"
 
#include "qtimer.h"
#include "ui_qgsgraduatedsymbolrendererwidget.h"
 
#include "qgis_gui.h"
 
class QgsSymbolSelectorWidget;
 
#ifndef SIP_RUN
 
class GUI_EXPORT QgsGraduatedSymbolRendererModel : public QAbstractItemModel
{
    Q_OBJECT
  public:
    QgsGraduatedSymbolRendererModel( QObject *parent = nullptr, QScreen *screen = nullptr );
    Qt::ItemFlags flags( const QModelIndex &index ) const override;
    Qt::DropActions supportedDropActions() const override;
    QVariant data( const QModelIndex &index, int role ) const override;
    bool setData( const QModelIndex &index, const QVariant &value, int role ) override;
    QVariant headerData( int section, Qt::Orientation orientation, int role ) const override;
    int rowCount( const QModelIndex &parent = QModelIndex() ) const override;
    int columnCount( const QModelIndex & = QModelIndex() ) const override;
    QModelIndex index( int row, int column, const QModelIndex &parent = QModelIndex() ) const override;
    QModelIndex parent( const QModelIndex &index ) const override;
    QStringList mimeTypes() const override;
    QMimeData *mimeData( const QModelIndexList &indexes ) const override;
    bool dropMimeData( const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent ) override;
 
    void setRenderer( QgsGraduatedSymbolRenderer *renderer );
 
    QgsRendererRange rendererRange( const QModelIndex &index );
    void addClass( QgsSymbol *symbol );
    void addClass( const QgsRendererRange &range );
    void deleteRows( QList<int> rows );
    void removeAllRows();
    void sort( int column, Qt::SortOrder order = Qt::AscendingOrder ) override;
    void updateSymbology();
    void updateLabels();
 
  signals:
    void rowsMoved();
 
  private:
    QgsGraduatedSymbolRenderer *mRenderer = nullptr;
    QString mMimeFormat;
    QPointer< QScreen > mScreen;
};
 
// View style which shows drop indicator line between items
class QgsGraduatedSymbolRendererViewStyle: public QgsProxyStyle
{
    Q_OBJECT
 
  public:
    explicit QgsGraduatedSymbolRendererViewStyle( QWidget *parent );
 
    void drawPrimitive( PrimitiveElement element, const QStyleOption *option, QPainter *painter, const QWidget *widget = nullptr ) const override;
};
 
#endif
 
class GUI_EXPORT QgsGraduatedSymbolRendererWidget : public QgsRendererWidget, private Ui::QgsGraduatedSymbolRendererWidget, private QgsExpressionContextGenerator
{
    Q_OBJECT
 
  public:
    static QgsRendererWidget *create( QgsVectorLayer *layer, QgsStyle *style, QgsFeatureRenderer *renderer ) SIP_FACTORY;
 
    QgsGraduatedSymbolRendererWidget( QgsVectorLayer *layer, QgsStyle *style, QgsFeatureRenderer *renderer );
    ~QgsGraduatedSymbolRendererWidget() override;
 
    QgsFeatureRenderer *renderer() override;
    void setContext( const QgsSymbolWidgetContext &context ) override;
    void disableSymbolLevels() override SIP_SKIP;
 
  public slots:
    void graduatedColumnChanged( const QString &field );
    void classifyGraduated();
    void reapplyColorRamp();
    void reapplySizes();
    void rangesDoubleClicked( const QModelIndex &idx );
    void rangesClicked( const QModelIndex &idx );
    void changeCurrentValue( QStandardItem *item );
 
    void addClass();
    void deleteClasses();
    void deleteAllClasses();
    void toggleBoundariesLink( bool linked );
 
    void labelFormatChanged();
 
    void showSymbolLevels();
 
    void rowsMoved();
    void modelDataChanged();
 
    void refreshRanges( bool reset );
 
  protected:
    void setSymbolLevels( const QgsLegendSymbolList &levels, bool enabled ) override;
 
  private slots:
    void mSizeUnitWidget_changed();
    void methodComboBox_currentIndexChanged( int );
    void updateMethodParameters();
    void updateSymbolsFromWidget( QgsSymbolSelectorWidget *widget );
    void dataDefinedSizeLegend();
    void changeGraduatedSymbol();
    void selectionChanged( const QItemSelection &selected, const QItemSelection &deselected );
    void symmetryPointEditingFinished();
    void classifyGraduatedImpl();
 
  protected slots:
 
    void pasteSymbolToSelection() override;
 
  protected:
    void updateUiFromRenderer( bool updateCount = true );
    void connectUpdateHandlers();
    void disconnectUpdateHandlers();
    bool rowsOrdered();
 
    QList<int> selectedClasses();
    QgsRangeList selectedRanges();
 
    void changeRangeSymbol( int rangeIdx );
    void changeRange( int rangeIdx );
 
    void changeSelectedSymbols();
    void applyChangeToSymbol();
 
    QList<QgsSymbol *> selectedSymbols() override;
    QgsSymbol *findSymbolForRange( double lowerBound, double upperBound, const QgsRangeList &ranges ) const;
    void refreshSymbolView() override;
 
    void keyPressEvent( QKeyEvent *event ) override;
 
  private:
    enum MethodMode
    {
      ColorMode,
      SizeMode
    };
 
    QgsExpressionContext createExpressionContext() const override;
    void toggleMethodWidgets( MethodMode mode );
 
    void clearParameterWidgets();
 
    std::unique_ptr< QgsGraduatedSymbolRenderer > mRenderer;
 
    std::unique_ptr< QgsSymbol > mGraduatedSymbol;
 
    int mRowSelected;
 
    QgsGraduatedSymbolRendererModel *mModel = nullptr;
 
    QgsRangeList mCopyBuffer;
 
    QgsDoubleValidator *mSymmetryPointValidator = nullptr;
    QAction *mActionLevels = nullptr;
    std::vector< std::unique_ptr< QgsAbstractProcessingParameterWidgetWrapper >> mParameterWidgetWrappers;
 
    int mBlockUpdates = 0;
 
    QTimer mUpdateTimer;
};
 
 
#endif // QGSGRADUATEDSYMBOLRENDERERWIDGET_H