qgscategorizedsymbolrendererwidget.h

Go to the documentation of this file.

/***************************************************************************
    qgscategorizedsymbolrendererwidget.h
    ---------------------
    begin                : November 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 QGSCATEGORIZEDSYMBOLRENDERERWIDGET_H
#define QGSCATEGORIZEDSYMBOLRENDERERWIDGET_H
 
#include "qgscategorizedsymbolrenderer.h"
#include "qgis_sip.h"
#include "qgsrendererwidget.h"
#include "qgsproxystyle.h"
#include <QStandardItem>
#include <QStyledItemDelegate>
 
 
class QgsCategorizedSymbolRenderer;
class QgsRendererCategory;
class QgsSymbolSelectorWidget;
 
#include "ui_qgscategorizedsymbolrendererwidget.h"
#include "qgis_gui.h"
 
 
#ifndef SIP_RUN
 
class GUI_EXPORT QgsCategorizedSymbolRendererModel : public QAbstractItemModel
{
    Q_OBJECT
  public:
    QgsCategorizedSymbolRendererModel( 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( QgsCategorizedSymbolRenderer *renderer );
 
    void addCategory( const QgsRendererCategory &cat );
    QgsRendererCategory category( const QModelIndex &index );
    void deleteRows( QList<int> rows );
    void removeAllRows();
    void sort( int column, Qt::SortOrder order = Qt::AscendingOrder ) override;
    void updateSymbology();
 
  signals:
    void rowsMoved();
 
  private:
    QgsCategorizedSymbolRenderer *mRenderer = nullptr;
    QString mMimeFormat;
    QPointer< QScreen > mScreen;
};
 
class QgsCategorizedSymbolRendererViewStyle: public QgsProxyStyle
{
    Q_OBJECT
 
  public:
    explicit QgsCategorizedSymbolRendererViewStyle( QWidget *parent );
 
    void drawPrimitive( PrimitiveElement element, const QStyleOption *option, QPainter *painter, const QWidget *widget = nullptr ) const override;
};
 
class QgsCategorizedRendererViewItemDelegate: public QStyledItemDelegate
{
    Q_OBJECT
 
  public:
    explicit QgsCategorizedRendererViewItemDelegate( QgsFieldExpressionWidget *expressionWidget, QObject *parent = nullptr );
 
    // QAbstractItemDelegate interface
    QWidget *createEditor( QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index ) const override;
 
  private:
 
    QgsFieldExpressionWidget *mFieldExpressionWidget = nullptr;
};
 
 
 
#endif
 
class GUI_EXPORT QgsCategorizedSymbolRendererWidget : public QgsRendererWidget, private Ui::QgsCategorizedSymbolRendererWidget, private QgsExpressionContextGenerator
{
    Q_OBJECT
  public:
 
    enum CustomRoles
    {
      ValueRole = Qt::UserRole + 1 
    };
 
    static QgsRendererWidget *create( QgsVectorLayer *layer, QgsStyle *style, QgsFeatureRenderer *renderer ) SIP_FACTORY;
 
    QgsCategorizedSymbolRendererWidget( QgsVectorLayer *layer, QgsStyle *style, QgsFeatureRenderer *renderer );
    ~QgsCategorizedSymbolRendererWidget() override;
 
    QgsFeatureRenderer *renderer() override;
    void setContext( const QgsSymbolWidgetContext &context ) override;
    void disableSymbolLevels() override SIP_SKIP;
 
    int matchToSymbols( QgsStyle *style );
 
  public slots:
    void changeCategorizedSymbol();
    void categoryColumnChanged( const QString &field );
    void categoriesDoubleClicked( const QModelIndex &idx );
    void addCategory();
    void addCategories();
 
    void applyColorRamp();
 
    void deleteCategories();
    void deleteAllCategories();
 
    void showSymbolLevels();
 
    void rowsMoved();
 
    void matchToSymbolsFromLibrary();
 
    void matchToSymbolsFromXml();
 
  protected:
    void setSymbolLevels( const QgsLegendSymbolList &levels, bool enabled ) override;
 
  protected slots:
 
    void pasteSymbolToSelection() override;
 
  private slots:
 
    void updateSymbolsFromWidget( QgsSymbolSelectorWidget *widget );
    void updateSymbolsFromButton();
    void dataDefinedSizeLegend();
 
    void mergeSelectedCategories();
 
    void unmergeSelectedCategories();
 
    void showContextMenu( QPoint p );
 
    void selectionChanged( const QItemSelection &selected, const QItemSelection &deselected );
 
  protected:
 
    void updateUiFromRenderer();
 
    // Called by virtual refreshSymbolView()
    void populateCategories();
 
    int currentCategoryRow();
 
    QList<int> selectedCategories();
 
    void changeSelectedSymbols();
 
    void changeCategorySymbol();
    void applyChangeToSymbol();
 
    QList<QgsSymbol *> selectedSymbols() override;
    QgsCategoryList selectedCategoryList();
    void refreshSymbolView() override;
    void keyPressEvent( QKeyEvent *event ) override;
 
  protected:
    std::unique_ptr< QgsCategorizedSymbolRenderer > mRenderer;
 
    std::unique_ptr< QgsSymbol > mCategorizedSymbol;
 
    QgsCategorizedSymbolRendererModel *mModel = nullptr;
 
  private:
    QString mOldClassificationAttribute;
    QgsCategoryList mCopyBuffer;
    QMenu *mContextMenu = nullptr;
    QAction *mMergeCategoriesAction = nullptr;
    QAction *mUnmergeCategoriesAction = nullptr;
    QAction *mActionLevels = nullptr;
 
    QgsExpressionContext createExpressionContext() const override;
 
    friend class TestQgsCategorizedRendererWidget;
};
 
#endif // QGSCATEGORIZEDSYMBOLRENDERERWIDGET_H