QGIS API Documentation  3.27.0-Master (aef1b1ec20)
qgsdiagramproperties.h
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1 /***************************************************************************
2  qgsdiagramproperties.h
3  Properties for diagram layers
4  -------------------
5  begin : August 2012
6  copyright : (C) Matthias Kuhn
7  email : matthias at opengis dot ch
8 
9  ***************************************************************************
10  * *
11  * This program is free software; you can redistribute it and/or modify *
12  * it under the terms of the GNU General Public License as published by *
13  * the Free Software Foundation; either version 2 of the License, or *
14  * (at your option) any later version. *
15  * *
16  ***************************************************************************/
17 
18 #ifndef QGSDIAGRAMPROPERTIES_H
19 #define QGSDIAGRAMPROPERTIES_H
20 
21 // We don't want to expose this in the public API
22 #define SIP_NO_FILE
23 
24 #include "ui_qgsdiagrampropertiesbase.h"
25 
26 #include "qgis_gui.h"
27 #include "qgsdiagramrenderer.h"
28 #include "qgscolorschemelist.h"
29 
30 #include <QDialog>
31 #include <QStyledItemDelegate>
32 
33 class QgsVectorLayer;
34 class QgsMapCanvas;
35 
40 class GUI_EXPORT QgsDiagramProperties : public QWidget, private Ui::QgsDiagramPropertiesBase, private QgsExpressionContextGenerator
41 {
42  Q_OBJECT
43 
44  public:
45  QgsDiagramProperties( QgsVectorLayer *layer, QWidget *parent, QgsMapCanvas *canvas );
46 
52  void syncToLayer();
53 
54  ~QgsDiagramProperties() override;
55 
57  void addAttribute( QTreeWidgetItem *item );
58 
59  signals:
60 
62 
63  public slots:
64  void apply();
65  void mDiagramTypeComboBox_currentIndexChanged( int index );
66  void mAddCategoryPushButton_clicked();
67  void mAttributesTreeWidget_itemDoubleClicked( QTreeWidgetItem *item, int column );
68  void mFindMaximumValueButton_clicked();
69  void mRemoveCategoryPushButton_clicked();
70  void mDiagramAttributesTreeWidget_itemDoubleClicked( QTreeWidgetItem *item, int column );
71  void mEngineSettingsButton_clicked();
72  void showAddAttributeExpressionDialog();
73  void mDiagramStackedWidget_currentChanged( int index );
74  void updatePlacementWidgets();
75  void scalingTypeChanged();
76  void showSizeLegendDialog();
77 
78  private slots:
79 
80  void updateProperty();
81  void showHelp();
82 
83  void createAuxiliaryField();
84 
85  private:
86 
87  QgsVectorLayer *mLayer = nullptr;
89  QButtonGroup *mPlacePointBtnGrp = nullptr;
91  QButtonGroup *mPlaceLineBtnGrp = nullptr;
93  QButtonGroup *mPlacePolygonBtnGrp = nullptr;
94 
95  std::unique_ptr< QgsPaintEffect> mPaintEffect;
96 
97  enum Columns
98  {
99  ColumnAttributeExpression = 0,
100  ColumnColor,
101  ColumnLegendText,
102  };
103 
104  enum Roles
105  {
106  RoleAttributeExpression = Qt::UserRole,
107  };
108 
109  QString showExpressionBuilder( const QString &initialExpression );
110 
111  QgsPropertyCollection mDataDefinedProperties;
112 
113  // Keeps track of the diagram type to properly save / restore settings when the diagram type combo box is set to no diagram.
114  QString mDiagramType;
115  std::unique_ptr< QgsDataDefinedSizeLegend > mSizeLegend;
116 
117  QString guessLegendText( const QString &expression );
118  QgsMapCanvas *mMapCanvas = nullptr;
119 
121 
122  void registerDataDefinedButton( QgsPropertyOverrideButton *button, QgsDiagramLayerSettings::Property key );
123 };
124 
125 
126 
127 
128 #endif // QGSDIAGRAMPROPERTIES_H
Property
Data definable properties.
Abstract interface for generating an expression context.
virtual QgsExpressionContext createExpressionContext() const =0
This method needs to be reimplemented in all classes which implement this interface and return an exp...
Expression contexts are used to encapsulate the parameters around which a QgsExpression should be eva...
Map canvas is a class for displaying all GIS data types on a canvas.
Definition: qgsmapcanvas.h:90
A grouped map of multiple QgsProperty objects, each referenced by a integer key value.
A button for controlling property overrides which may apply to a widget.
Represents a vector layer which manages a vector based data sets.