QGIS API Documentation  2.17.0-Master (06698cd)
qgsexpressionbuilderdialog.cpp
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1 /***************************************************************************
2  qgisexpressionbuilderdialog.h - A genric expression string builder dialog.
3  --------------------------------------
4  Date : 29-May-2011
5  Copyright : (C) 2011 by Nathan Woodrow
6  Email : woodrow.nathan at gmail dot com
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 
17 #include <QSettings>
18 
20  : QDialog( parent )
21  , mRecentKey( key )
22 {
23  setupUi( this );
24 
25  QPushButton* okButton = buttonBox->button( QDialogButtonBox::Ok );
26  connect( builder, SIGNAL( expressionParsed( bool ) ), okButton, SLOT( setEnabled( bool ) ) );
27 
28  builder->setExpressionContext( context );
29  builder->setLayer( layer );
30  builder->setExpressionText( startText );
31  builder->loadFieldNames();
32  builder->loadRecent( mRecentKey );
33 
34  QSettings settings;
35  restoreGeometry( settings.value( "/Windows/ExpressionBuilderDialog/geometry" ).toByteArray() );
36 }
37 
39 {
40  return builder;
41 }
42 
44 {
45  builder->setExpressionText( text );
46 }
47 
49 {
50  return builder->expressionText();
51 }
52 
54 {
55  return builder->expressionContext();
56 }
57 
59 {
60  builder->setExpressionContext( context );
61 }
62 
64 {
65  QDialog::done( r );
66 
67  QSettings settings;
68  settings.setValue( "/Windows/ExpressionBuilderDialog/geometry", saveGeometry() );
69 }
70 
72 {
73  builder->saveToRecent( mRecentKey );
75 }
76 
78 {
79  // Store in child widget only.
80  builder->setGeomCalculator( da );
81 }
QByteArray toByteArray() const
void setupUi(QWidget *widget)
void setExpressionText(const QString &text)
QgsExpressionBuilderWidget * expressionBuilder()
The builder widget that is used by the dialog.
virtual void done(int r)
void setValue(const QString &key, const QVariant &value)
void setEnabled(bool)
QgsExpressionBuilderDialog(QgsVectorLayer *layer, const QString &startText=QString(), QWidget *parent=nullptr, const QString &key="generic", const QgsExpressionContext &context=QgsExpressionContext())
bool restoreGeometry(const QByteArray &geometry)
Expression contexts are used to encapsulate the parameters around which a QgsExpression should be eva...
void setExpressionContext(const QgsExpressionContext &context)
Sets the expression context for the dialog.
QgsExpressionContext expressionContext() const
Returns the expression context for the dialog.
void setGeomCalculator(const QgsDistanceArea &da)
Sets geometry calculator used in distance/area calculations.
virtual void accept()
General purpose distance and area calculator.
A reusable widget that can be used to build a expression string.
QVariant value(const QString &key, const QVariant &defaultValue) const
QByteArray saveGeometry() const
virtual void done(int r) override
Is called when the dialog get accepted or rejected Used to save geometry.
bool connect(const QObject *sender, const char *signal, const QObject *receiver, const char *method, Qt::ConnectionType type)
Represents a vector layer which manages a vector based data sets.