QGIS API Documentation  3.25.0-Master (10b47c2603)
qgsaggregatetoolbutton.cpp
Go to the documentation of this file.
1 /***************************************************************************
2  qgsaggregatetoolbutton.cpp
3  --------------------------------------
4  Date : Nov 2017
5  Copyright : (C) 2017 Matthias Kuhn
6  Email : [email protected]
7  ***************************************************************************
8  * *
9  * This program is free software; you can redistribute it and/or modify *
10  * it under the terms of the GNU General Public License as published by *
11  * the Free Software Foundation; either version 2 of the License, or *
12  * (at your option) any later version. *
13  * *
14  ***************************************************************************/
15 
16 #include "qgsaggregatetoolbutton.h"
17 #include "qgsaggregatecalculator.h"
18 #include "qgis.h"
19 
20 #include <QMenu>
21 
23 {
24  setFocusPolicy( Qt::StrongFocus );
25  setPopupMode( QToolButton::InstantPopup );
26 
27  mMenu = new QMenu( this );
28  connect( mMenu, &QMenu::aboutToShow, this, &QgsAggregateToolButton::aboutToShowMenu );
29  setMenu( mMenu );
30 
31  setText( tr( "Exclude" ) );
32 }
33 
34 void QgsAggregateToolButton::setType( QVariant::Type type )
35 {
36  if ( mType == type )
37  return;
38 
39  mType = type;
40  updateAvailableAggregates();
41 }
42 
43 void QgsAggregateToolButton::aboutToShowMenu()
44 {
45  mMenu->clear();
46 
47  QAction *action = mMenu->addAction( tr( "Exclude" ) );
48  connect( action, &QAction::triggered, this, [ this ]
49  {
50  setActive( false );
51  } );
52 
53  for ( const auto &aggregate : std::as_const( mAvailableAggregates ) )
54  {
55  QAction *action = mMenu->addAction( aggregate.name );
56  connect( action, &QAction::triggered, this, [ this, aggregate ]
57  {
58  setText( aggregate.name );
59  setAggregate( aggregate.function );
60  } );
61  }
62 }
63 
64 void QgsAggregateToolButton::updateAvailableAggregates()
65 {
66  QList<QgsAggregateCalculator::AggregateInfo> aggregates = QgsAggregateCalculator::aggregates();
67 
68  for ( const auto &aggregate : aggregates )
69  {
70  if ( aggregate.supportedTypes.contains( mType ) )
71  {
72  mAvailableAggregates.append( aggregate );
73  }
74  }
75 }
76 
78 {
79  if ( active == mActive )
80  return;
81 
82  mActive = active;
83 
84  if ( !active )
85  setText( tr( "Exclude" ) );
86  emit activeChanged();
87 }
88 
90 {
91  return mAggregate;
92 }
93 
94 void QgsAggregateToolButton::setAggregate( const QString &aggregate )
95 {
96  if ( aggregate == mAggregate )
97  return;
98 
99  mAggregate = QString();
100 
101  for ( const auto &agg : std::as_const( mAvailableAggregates ) )
102  {
103  if ( agg.function == aggregate )
104  {
105  mAggregate = aggregate;
106  setText( agg.name );
107  break;
108  }
109  }
110 
111  setActive( !mAggregate.isEmpty() );
112 
113  emit aggregateChanged();
114 }
115 
117 {
118  return mActive;
119 }
120 
121 QVariant::Type QgsAggregateToolButton::type() const
122 {
123  return mType;
124 }
static QList< QgsAggregateCalculator::AggregateInfo > aggregates()
Structured information for available aggregates.
void setActive(bool active)
When this flag is false, the aggregate will be deactivated.
bool active() const
When this flag is false, the aggregate will be deactivated.
void setAggregate(const QString &aggregate)
The function name of the selected aggregate or a Null String if none is chosen.
void setType(QVariant::Type type)
Based on the type of underlying data, some aggregates will be available or not.
QString aggregate() const
The function name of the selected aggregate or a Null String if none is chosen.
void activeChanged()
A function has been selected or deselected.
void aggregateChanged()
The function name of the selected aggregate has changed.
QVariant::Type type() const
Based on the type of underlying data, some aggregates will be available or not.