QGIS API Documentation  3.16.0-Hannover (43b64b13f3)
qgsnullsymbolrendererwidget.cpp
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1 /***************************************************************************
2  qgsnullsymbolrendererwidget.cpp
3  ---------------------
4  begin : November 2014
5  copyright : (C) 2014 by Nyall Dawson
6  email : nyall dot dawson 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  ***************************************************************************/
16 
17 #include "qgsnullsymbolrenderer.h"
18 #include "qgssymbol.h"
19 #include <QLayout>
20 #include <QLabel>
21 
23 {
24  return new QgsNullSymbolRendererWidget( layer, style, renderer );
25 }
26 
28  : QgsRendererWidget( layer, style )
29 
30 {
31  if ( renderer )
32  {
34  }
35  if ( !mRenderer )
36  {
38  }
39 
40  QGridLayout *layout = new QGridLayout( this );
41  QLabel *label = new QLabel( tr( "No symbols will be rendered for features in this layer." ) );
42  layout->addWidget( label );
43 }
44 
46 {
47  delete mRenderer;
48 }
49 
51 {
52  return mRenderer;
53 }
qgsnullsymbolrenderer.h
QgsNullSymbolRendererWidget::renderer
QgsFeatureRenderer * renderer() override
Returns a pointer to the configured renderer.
Definition: qgsnullsymbolrendererwidget.cpp:50
QgsNullSymbolRendererWidget::mRenderer
QgsNullSymbolRenderer * mRenderer
Renderer being configured by the widget.
Definition: qgsnullsymbolrendererwidget.h:52
QgsNullSymbolRenderer::convertFromRenderer
static QgsNullSymbolRenderer * convertFromRenderer(const QgsFeatureRenderer *renderer)
Creates a QgsNullSymbolRenderer from an existing renderer.
Definition: qgsnullsymbolrenderer.cpp:116
QgsNullSymbolRenderer
Null symbol renderer.
Definition: qgsnullsymbolrenderer.h:32
QgsRendererWidget
Base class for renderer settings widgets.
Definition: qgsrendererwidget.h:45
QgsFeatureRenderer
Definition: qgsrenderer.h:103
QgsStyle
Definition: qgsstyle.h:160
QgsVectorLayer
Represents a vector layer which manages a vector based data sets.
Definition: qgsvectorlayer.h:387
qgsnullsymbolrendererwidget.h
QgsNullSymbolRendererWidget::QgsNullSymbolRendererWidget
QgsNullSymbolRendererWidget(QgsVectorLayer *layer, QgsStyle *style, QgsFeatureRenderer *renderer)
Constructor for QgsNullSymbolRendererWidget.
Definition: qgsnullsymbolrendererwidget.cpp:27
qgssymbol.h
QgsNullSymbolRendererWidget::~QgsNullSymbolRendererWidget
~QgsNullSymbolRendererWidget() override
Definition: qgsnullsymbolrendererwidget.cpp:45
QgsNullSymbolRendererWidget::create
static QgsRendererWidget * create(QgsVectorLayer *layer, QgsStyle *style, QgsFeatureRenderer *renderer)
Creates a new QgsNullSymbolRendererWidget object.
Definition: qgsnullsymbolrendererwidget.cpp:22