QGIS API Documentation  3.6.0-Noosa (5873452)
qgsvectorfieldsymbollayerwidget.cpp
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1 /***************************************************************************
2  qgsvectorfieldsymbollayerwidget.cpp
3  ---------------------
4  begin : October 2011
5  copyright : (C) 2011 by Marco Hugentobler
6  email : marco dot hugentobler at sourcepole dot ch
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  ***************************************************************************/
17 #include "qgsvectorlayer.h"
18 
20 {
21  setupUi( this );
22  connect( mScaleSpinBox, static_cast < void ( QDoubleSpinBox::* )( double ) > ( &QDoubleSpinBox::valueChanged ), this, &QgsVectorFieldSymbolLayerWidget::mScaleSpinBox_valueChanged );
23  connect( mXAttributeComboBox, static_cast<void ( QComboBox::* )( int )>( &QComboBox::currentIndexChanged ), this, &QgsVectorFieldSymbolLayerWidget::mXAttributeComboBox_currentIndexChanged );
24  connect( mYAttributeComboBox, static_cast<void ( QComboBox::* )( int )>( &QComboBox::currentIndexChanged ), this, &QgsVectorFieldSymbolLayerWidget::mYAttributeComboBox_currentIndexChanged );
25  connect( mCartesianRadioButton, &QRadioButton::toggled, this, &QgsVectorFieldSymbolLayerWidget::mCartesianRadioButton_toggled );
26  connect( mPolarRadioButton, &QRadioButton::toggled, this, &QgsVectorFieldSymbolLayerWidget::mPolarRadioButton_toggled );
27  connect( mHeightRadioButton, &QRadioButton::toggled, this, &QgsVectorFieldSymbolLayerWidget::mHeightRadioButton_toggled );
28  connect( mDegreesRadioButton, &QRadioButton::toggled, this, &QgsVectorFieldSymbolLayerWidget::mDegreesRadioButton_toggled );
29  connect( mRadiansRadioButton, &QRadioButton::toggled, this, &QgsVectorFieldSymbolLayerWidget::mRadiansRadioButton_toggled );
30  connect( mClockwiseFromNorthRadioButton, &QRadioButton::toggled, this, &QgsVectorFieldSymbolLayerWidget::mClockwiseFromNorthRadioButton_toggled );
31  connect( mCounterclockwiseFromEastRadioButton, &QRadioButton::toggled, this, &QgsVectorFieldSymbolLayerWidget::mCounterclockwiseFromEastRadioButton_toggled );
32  connect( mDistanceUnitWidget, &QgsUnitSelectionWidget::changed, this, &QgsVectorFieldSymbolLayerWidget::mDistanceUnitWidget_changed );
33 
36 
37  if ( vectorLayer() )
38  {
39  mXAttributeComboBox->addItem( QString() );
40  mYAttributeComboBox->addItem( QString() );
41  int i = 0;
42  const QgsFields fields = vectorLayer()->fields();
43  for ( const QgsField &f : fields )
44  {
45  QString fieldName = f.name();
46  mXAttributeComboBox->addItem( vectorLayer()->fields().iconForField( i ), fieldName );
47  mYAttributeComboBox->addItem( vectorLayer()->fields().iconForField( i ), fieldName );
48  i++;
49  }
50  }
51 }
52 
54 {
55  if ( layer->layerType() != QLatin1String( "VectorField" ) )
56  {
57  return;
58  }
59  mLayer = static_cast<QgsVectorFieldSymbolLayer *>( layer );
60  if ( !mLayer )
61  {
62  return;
63  }
64 
65  mXAttributeComboBox->setCurrentIndex( mXAttributeComboBox->findText( mLayer->xAttribute() ) );
66  mYAttributeComboBox->setCurrentIndex( mYAttributeComboBox->findText( mLayer->yAttribute() ) );
67  mScaleSpinBox->setValue( mLayer->scale() );
68 
71  {
72  mCartesianRadioButton->setChecked( true );
73  }
74  else if ( type == QgsVectorFieldSymbolLayer::Polar )
75  {
76  mPolarRadioButton->setChecked( true );
77  }
78  else if ( type == QgsVectorFieldSymbolLayer::Height )
79  {
80  mHeightRadioButton->setChecked( true );
81  }
82 
85  {
86  mClockwiseFromNorthRadioButton->setChecked( true );
87  }
89  {
90  mCounterclockwiseFromEastRadioButton->setChecked( true );
91  }
92 
94  if ( angleUnits == QgsVectorFieldSymbolLayer::Degrees )
95  {
96  mDegreesRadioButton->setChecked( true );
97  }
98  else if ( angleUnits == QgsVectorFieldSymbolLayer::Radians )
99  {
100  mRadiansRadioButton->setChecked( true );
101  }
102 
103  mDistanceUnitWidget->blockSignals( true );
104  mDistanceUnitWidget->setUnit( mLayer->distanceUnit() );
105  mDistanceUnitWidget->setMapUnitScale( mLayer->distanceMapUnitScale() );
106  mDistanceUnitWidget->blockSignals( false );
107 
108  emit changed();
109 }
110 
112 {
113  return mLayer;
114 }
115 
116 void QgsVectorFieldSymbolLayerWidget::mScaleSpinBox_valueChanged( double d )
117 {
118  if ( mLayer )
119  {
120  mLayer->setScale( d );
121  emit changed();
122  }
123 }
124 
125 void QgsVectorFieldSymbolLayerWidget::mXAttributeComboBox_currentIndexChanged( int index )
126 {
127  if ( mLayer )
128  {
129  mLayer->setXAttribute( mXAttributeComboBox->itemText( index ) );
130  emit changed();
131  }
132 }
133 
134 void QgsVectorFieldSymbolLayerWidget::mYAttributeComboBox_currentIndexChanged( int index )
135 {
136  if ( mLayer )
137  {
138  mLayer->setYAttribute( mYAttributeComboBox->itemText( index ) );
139  emit changed();
140  }
141 }
142 
143 void QgsVectorFieldSymbolLayerWidget::mCartesianRadioButton_toggled( bool checked )
144 {
145  if ( mLayer && checked )
146  {
148  mXAttributeComboBox->setEnabled( true );
149  mYAttributeComboBox->setEnabled( true );
150  mXAttributeLabel->setText( tr( "X attribute" ) );
151  mYAttributeLabel->setText( tr( "Y attribute" ) );
152  emit changed();
153  }
154 }
155 
156 void QgsVectorFieldSymbolLayerWidget::mPolarRadioButton_toggled( bool checked )
157 {
158  if ( mLayer && checked )
159  {
161  mXAttributeComboBox->setEnabled( true );
162  mYAttributeComboBox->setEnabled( true );
163  mXAttributeLabel->setText( tr( "Length attribute" ) );
164  mYAttributeLabel->setText( tr( "Angle attribute" ) );
165  emit changed();
166  }
167 }
168 
169 void QgsVectorFieldSymbolLayerWidget::mHeightRadioButton_toggled( bool checked )
170 {
171  if ( mLayer && checked )
172  {
174  mXAttributeLabel->clear();
175  mXAttributeComboBox->setEnabled( false );
176  mYAttributeLabel->setText( tr( "Height attribute" ) );
177  emit changed();
178  }
179 }
180 
181 void QgsVectorFieldSymbolLayerWidget::mDegreesRadioButton_toggled( bool checked )
182 {
183  if ( mLayer && checked )
184  {
186  emit changed();
187  }
188 }
189 
190 void QgsVectorFieldSymbolLayerWidget::mRadiansRadioButton_toggled( bool checked )
191 {
192  if ( mLayer && checked )
193  {
195  emit changed();
196  }
197 }
198 
199 void QgsVectorFieldSymbolLayerWidget::mClockwiseFromNorthRadioButton_toggled( bool checked )
200 {
201  if ( mLayer && checked )
202  {
204  emit changed();
205  }
206 }
207 
208 void QgsVectorFieldSymbolLayerWidget::mCounterclockwiseFromEastRadioButton_toggled( bool checked )
209 {
210  if ( mLayer && checked )
211  {
213  emit changed();
214  }
215 }
216 
217 void QgsVectorFieldSymbolLayerWidget::mDistanceUnitWidget_changed()
218 {
219  if ( !mLayer )
220  {
221  return;
222  }
223 
224  mLayer->setDistanceUnit( mDistanceUnitWidget->unit() );
225  mLayer->setDistanceMapUnitScale( mDistanceUnitWidget->getMapUnitScale() );
226  emit changed();
227 }
228 
229 
230 
const QgsVectorLayer * vectorLayer() const
Returns the vector layer associated with the widget.
void setXAttribute(const QString &attribute)
void setYAttribute(const QString &attribute)
void setAngleUnits(AngleUnits units)
void setDistanceUnit(QgsUnitTypes::RenderUnit unit)
Sets the units for the distance.
AngleOrientation angleOrientation() const
Container of fields for a vector layer.
Definition: qgsfields.h:42
QList< QgsUnitTypes::RenderUnit > RenderUnitList
List of render units.
Definition: qgsunittypes.h:184
QgsVectorFieldSymbolLayerWidget(QgsVectorLayer *vl, QWidget *parent=nullptr)
Constructor for QgsVectorFieldSymbolLayerWidget.
A symbol layer class for displaying displacement arrows based on point layer attributes.
void changed()
Should be emitted whenever configuration changes happened on this symbol layer configuration.
QgsFields fields() const FINAL
Returns the list of fields of this layer.
const QgsMapUnitScale & distanceMapUnitScale() const
points (e.g., for font sizes)
Definition: qgsunittypes.h:118
void setSymbolLayer(QgsSymbolLayer *layer) override
void setDistanceMapUnitScale(const QgsMapUnitScale &scale)
Encapsulate a field in an attribute table or data source.
Definition: qgsfield.h:48
QgsUnitTypes::RenderUnit distanceUnit() const
Returns the units for the distance.
void setAngleOrientation(AngleOrientation orientation)
Represents a vector layer which manages a vector based data sets.
VectorFieldType vectorFieldType() const
void setVectorFieldType(VectorFieldType type)
virtual QString layerType() const =0
Returns a string that represents this layer type.