QGIS API Documentation 3.27.0-Master (75dc696944)
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]h
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
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
34void QgsAggregateToolButton::setType( QVariant::Type type )
35{
36 if ( mType == type )
37 return;
38
39 mType = type;
40 updateAvailableAggregates();
41}
42
43void 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
64void 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
94void 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
121QVariant::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.