QGIS API Documentation 3.37.0-Master (684a802617f)
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qgshillshaderendererwidget.cpp
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1/***************************************************************************
2 qgshillshaderendererwidget.cpp
3 ---------------------------------
4 begin : May 2016
5 copyright : (C) 2016 by Nathan Woodrow
6 email : woodrow dot nathan at gmail dot com
7 ***************************************************************************/
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
20#include "qgsrasterlayer.h"
24
26 : QgsRasterRendererWidget( layer, extent )
27{
28 setupUi( this );
29
30 mLightAngle->setMaximum( 90 );
31 mLightAzimuth->setMaximum( 360.00 );
32
33 mLightAngle->setValue( 45.00 );
34 mLightAngle->setClearValue( 45.0 );
35 mLightAzimuth->setValue( 315.00 );
36 mLightAzimuth->setClearValue( 315.00 );
37
38 // Update the dial correctly
39 mLightAzimuth_updated( 315.00 );
40 mZFactor->setValue( 1 );
41 mZFactor->setClearValue( 1 );
42
43 mMultiDirection->setChecked( false );
44 mBandsCombo->setLayer( mRasterLayer );
45
46 setFromRenderer( layer->renderer() );
47
48 connect( mLightAngle, static_cast < void ( QDoubleSpinBox::* )( double ) > ( &QDoubleSpinBox::valueChanged ), this, &QgsRasterRendererWidget::widgetChanged );
49 connect( mLightAzimuth, static_cast < void ( QDoubleSpinBox::* )( double ) > ( &QDoubleSpinBox::valueChanged ), this, &QgsHillshadeRendererWidget::mLightAzimuth_updated );
50 connect( mLightAzimuthDial, &QAbstractSlider::valueChanged, this, &QgsHillshadeRendererWidget::mLightAzimuthDial_updated );
51 connect( mZFactor, static_cast < void ( QDoubleSpinBox::* )( double ) > ( &QDoubleSpinBox::valueChanged ), this, &QgsRasterRendererWidget::widgetChanged );
52 connect( mMultiDirection, &QAbstractButton::toggled, this, &QgsRasterRendererWidget::widgetChanged );
54}
55
57{
58 if ( !mRasterLayer )
59 {
60 return nullptr;
61 }
62
64 if ( !provider )
65 {
66 return nullptr;
67 }
68
69 const int band = mBandsCombo->currentBand();
70 QgsHillshadeRenderer *renderer = new QgsHillshadeRenderer( provider, band, mLightAzimuth->value(), mLightAngle->value() );
71 const double value = mZFactor->value();
72 renderer->setZFactor( value );
73 renderer->setMultiDirectional( mMultiDirection->checkState() );
74 return renderer;
75}
76
78{
79 const QgsHillshadeRenderer *r = dynamic_cast<const QgsHillshadeRenderer *>( renderer );
80 if ( r )
81 {
82 mBandsCombo->setBand( r->inputBand() );
83 mLightAngle->setValue( r->altitude() );
84 mLightAzimuth->setValue( r->azimuth() );
85 mZFactor->setValue( r->zFactor() );
86 mMultiDirection->setChecked( r->multiDirectional() );
87 }
88}
89
91{
92 mLightAngle->setValue( altitude );
93}
94
96{
97 mLightAzimuth->setValue( azimuth );
98}
99
101{
102 mZFactor->setValue( zfactor );
103}
104
106{
107 mMultiDirection->setChecked( isMultiDirectional );
108}
109
110void QgsHillshadeRendererWidget::mLightAzimuth_updated( double value )
111{
112 int newvalue = static_cast<int>( value ) - 180;
113 if ( newvalue < 0 )
114 newvalue += 360;
115 whileBlocking( mLightAzimuthDial )->setValue( newvalue );
116 emit widgetChanged();
117}
118
119void QgsHillshadeRendererWidget::mLightAzimuthDial_updated( int value )
120{
121 int newvalue = static_cast<int>( value ) + 180;
122 if ( newvalue > 360 )
123 newvalue -= 360;
124 whileBlocking( mLightAzimuth )->setValue( newvalue );
125 emit widgetChanged();
126}
127
129{
130 return mLightAzimuth->value();
131}
132
134{
135 return mLightAngle->value();
136}
137
139{
140 return mZFactor->value();
141}
142
144{
145 return mMultiDirection->isChecked();
146}
QgsRasterRenderer * renderer() override
Creates a new renderer, using the properties defined in the widget.
double zFactor() const
Returns the Z scaling factor.
void setAzimuth(double azimuth)
Set the azimuth of the light source.
QgsHillshadeRendererWidget(QgsRasterLayer *layer, const QgsRectangle &extent=QgsRectangle())
Renderer widget for the hill shade renderer.
bool multiDirectional() const
Returns true if the renderer should use the multi-directional hillshade algorithm.
void setAltitude(double altitude)
Set the altitude of the light source.
double azimuth() const
Returns the direction of the light over the raster between 0-360.
void setFromRenderer(const QgsRasterRenderer *renderer)
Set the widget state from the given renderer.
void setZFactor(double zfactor)
Set the Z scaling factor of the result image.
double altitude() const
Returns the angle of the light source over the raster.
void setMultiDirectional(bool isMultiDirectional)
Sets whether to render using a multi-directional hillshade algorithm.
A renderer for generating live hillshade models.
bool multiDirectional() const
Returns true if the renderer is using multi-directional hillshading.
double azimuth() const
Returns the direction of the light over the raster between 0-360.
Q_DECL_DEPRECATED void setBand(int bandNo)
Sets the band used by the renderer.
int inputBand() const override
Returns the input band for the renderer, or -1 if no input band is available.
double altitude() const
Returns the angle of the light source over the raster.
double zFactor() const
Returns the Z scaling factor.
void bandChanged(int band)
Emitted when the currently selected band changes.
Base class for raster data providers.
Represents a raster layer.
QgsRasterRenderer * renderer() const
Returns the raster's renderer.
QgsRasterDataProvider * dataProvider() override
Returns the source data provider.
Abstract base class for widgets which configure a QgsRasterRenderer.
void widgetChanged()
Emitted when something on the widget has changed.
Raster renderer pipe that applies colors to a raster.
A rectangle specified with double values.
QgsSignalBlocker< Object > whileBlocking(Object *object)
Temporarily blocks signals from a QObject while calling a single method from the object.
Definition qgis.h:5349