QGIS API Documentation 3.34.0-Prizren (ffbdd678812)
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qgsprocessinghelpeditorwidget.cpp
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1/***************************************************************************
2 qgsprocessinghelpeditorwidget.h
3 ------------------------
4 Date : February 2022
5 Copyright : (C) 2022 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 ***************************************************************************/
15
18#include "qgsgui.h"
19#include <QTreeWidgetItem>
20#include <QDialogButtonBox>
21#include <QVBoxLayout>
22
24
25const QString QgsProcessingHelpEditorWidget::ALGORITHM_DESCRIPTION = QStringLiteral( "ALG_DESC" );
26const QString QgsProcessingHelpEditorWidget::ALGORITHM_CREATOR = QStringLiteral( "ALG_CREATOR" );
27const QString QgsProcessingHelpEditorWidget::ALGORITHM_HELP_CREATOR = QStringLiteral( "ALG_HELP_CREATOR" );
28const QString QgsProcessingHelpEditorWidget::ALGORITHM_VERSION = QStringLiteral( "ALG_VERSION" );
29const QString QgsProcessingHelpEditorWidget::ALGORITHM_SHORT_DESCRIPTION = QStringLiteral( "SHORT_DESCRIPTION" );
30const QString QgsProcessingHelpEditorWidget::ALGORITHM_HELP_URL = QStringLiteral( "HELP_URL" );
31const QString QgsProcessingHelpEditorWidget::ALGORITHM_EXAMPLES = QStringLiteral( "EXAMPLES" );
32
33
34class QgsProcessingHelpEditorTreeItem : public QTreeWidgetItem
35{
36 public:
37
38 QgsProcessingHelpEditorTreeItem( const QString &name, const QString &description )
39 : QTreeWidgetItem()
40 , name( name )
41 , description( description )
42 {
43 setText( 0, description );
44 }
45
46 QString name;
47 QString description;
48
49};
50
51
52QgsProcessingHelpEditorWidget::QgsProcessingHelpEditorWidget( QWidget *parent )
53 : QWidget( parent )
54 , mCurrentName( ALGORITHM_DESCRIPTION )
55{
56 setupUi( this );
57
58 connect( mElementTree, &QTreeWidget::currentItemChanged, this, &QgsProcessingHelpEditorWidget::changeItem );
59 connect( mTextEdit, &QTextEdit::textChanged, this, [ = ]
60 {
61 if ( !mCurrentName.isEmpty() )
62 {
63 if ( mEditStackedWidget->currentWidget() == mPagePlainText )
64 {
65 mHelpContent[ mCurrentName] = mTextEdit->toPlainText();
66 updateHtmlView();
67 }
68 }
69 } );
70
71 connect( mRichTextEdit, &QgsRichTextEditor::textChanged, this, [ = ]
72 {
73 if ( !mCurrentName.isEmpty() )
74 {
75 if ( mEditStackedWidget->currentWidget() == mPageRichEdit )
76 {
77 mHelpContent[ mCurrentName] = mRichTextEdit->toHtml();
78 updateHtmlView();
79 }
80 }
81 } );
82}
83
84QgsProcessingHelpEditorWidget::~QgsProcessingHelpEditorWidget() = default;
85
86void QgsProcessingHelpEditorWidget::setAlgorithm( const QgsProcessingAlgorithm *algorithm )
87{
88 if ( !algorithm )
89 return;
90
91 mAlgorithm.reset( algorithm->create() );
92
93 if ( const QgsProcessingModelAlgorithm *model = dynamic_cast< const QgsProcessingModelAlgorithm *>( mAlgorithm.get() ) )
94 {
95 mHelpContent = model->helpContent();
96 }
97
98 mEditStackedWidget->setCurrentWidget( mPageRichEdit );
99 if ( mHelpContent.contains( ALGORITHM_DESCRIPTION ) )
100 {
101 mRichTextEdit->setText( mHelpContent.value( ALGORITHM_DESCRIPTION ).toString() );
102 }
103
104 mElementTree->addTopLevelItem( new QgsProcessingHelpEditorTreeItem( ALGORITHM_DESCRIPTION, tr( "Algorithm description" ) ) );
105 mElementTree->addTopLevelItem( new QgsProcessingHelpEditorTreeItem( ALGORITHM_SHORT_DESCRIPTION, tr( "Short description" ) ) );
106
107 QgsProcessingHelpEditorTreeItem *parametersItem = new QgsProcessingHelpEditorTreeItem( QString(), tr( "Input parameters" ) );
108 mElementTree->addTopLevelItem( parametersItem );
109
110 const QList< const QgsProcessingParameterDefinition * > definitions = mAlgorithm->parameterDefinitions();
111 for ( const QgsProcessingParameterDefinition *definition : definitions )
112 {
113 if ( definition->flags() & QgsProcessingParameterDefinition::FlagHidden || definition->isDestination() )
114 continue;
115
116 parametersItem->addChild( new QgsProcessingHelpEditorTreeItem( definition->name(), definition->description() ) );
117 }
118
119 QgsProcessingHelpEditorTreeItem *outputsItem = new QgsProcessingHelpEditorTreeItem( QString(), tr( "Outputs" ) );
120 mElementTree->addTopLevelItem( outputsItem );
121 const QList< const QgsProcessingOutputDefinition * > outputs = mAlgorithm->outputDefinitions();
122 for ( const QgsProcessingOutputDefinition *output : outputs )
123 {
124 outputsItem->addChild( new QgsProcessingHelpEditorTreeItem( output->name(), output->description() ) );
125 }
126
127 mElementTree->addTopLevelItem( new QgsProcessingHelpEditorTreeItem( ALGORITHM_EXAMPLES, tr( "Examples" ) ) );
128
129 mElementTree->addTopLevelItem( new QgsProcessingHelpEditorTreeItem( ALGORITHM_CREATOR, tr( "Algorithm author" ) ) );
130 mElementTree->addTopLevelItem( new QgsProcessingHelpEditorTreeItem( ALGORITHM_HELP_CREATOR, tr( "Help author" ) ) );
131 mElementTree->addTopLevelItem( new QgsProcessingHelpEditorTreeItem( ALGORITHM_VERSION, tr( "Algorithm version" ) ) );
132 mElementTree->addTopLevelItem( new QgsProcessingHelpEditorTreeItem( ALGORITHM_HELP_URL, tr( "Documentation help URL (for help button)" ) ) );
133
134 updateHtmlView();
135}
136
137QVariantMap QgsProcessingHelpEditorWidget::helpContent()
138{
139 storeCurrentValue();
140 return mHelpContent;
141}
142
143void QgsProcessingHelpEditorWidget::updateHtmlView()
144{
145 mTextPreview->setHtml( formattedHelp() );
146}
147
148void QgsProcessingHelpEditorWidget::changeItem( QTreeWidgetItem *, QTreeWidgetItem * )
149{
150 if ( QgsProcessingHelpEditorTreeItem *item = dynamic_cast< QgsProcessingHelpEditorTreeItem *>( mElementTree->currentItem() ) )
151 {
152 storeCurrentValue();
153
154 const QString name = item->name;
155 if ( !name.isEmpty() )
156 {
157 mTextEdit->setEnabled( true );
158 mRichTextEdit->setEnabled( true );
159
160 updateHtmlView();
161 mCurrentName = name;
162
163 const bool useRichTextEdit = name == ALGORITHM_EXAMPLES || name == ALGORITHM_DESCRIPTION;
164 if ( useRichTextEdit )
165 {
166 mEditStackedWidget->setCurrentWidget( mPageRichEdit );
167 if ( mHelpContent.contains( name ) )
168 mRichTextEdit->setText( mHelpContent.value( name ).toString() );
169 else
170 mRichTextEdit->setText( QString() );
171 }
172 else
173 {
174 mEditStackedWidget->setCurrentWidget( mPagePlainText );
175 if ( mHelpContent.contains( name ) )
176 mTextEdit->setText( mHelpContent.value( name ).toString() );
177 else
178 mTextEdit->clear();
179 }
180 }
181 else
182 {
183 mCurrentName.clear();
184 mTextEdit->clear();
185 mRichTextEdit->setText( QString() );
186 mTextEdit->setEnabled( false );
187 mRichTextEdit->setEnabled( false );
188 mEditStackedWidget->setCurrentWidget( mPagePlainText );
189 updateHtmlView();
190 }
191 }
192}
193
194QString QgsProcessingHelpEditorWidget::formattedHelp() const
195{
196 if ( !mAlgorithm )
197 return QString();
198
199 return QgsProcessingUtils::formatHelpMapAsHtml( mHelpContent, mAlgorithm.get() );
200}
201
202void QgsProcessingHelpEditorWidget::storeCurrentValue()
203{
204 if ( !mCurrentName.isEmpty() )
205 {
206 if ( mEditStackedWidget->currentWidget() == mPagePlainText )
207 mHelpContent[ mCurrentName] = mTextEdit->toPlainText();
208 else
209 mHelpContent[ mCurrentName] = mRichTextEdit->toHtml();
210 }
211}
212
213QgsProcessingHelpEditorDialog::QgsProcessingHelpEditorDialog( QWidget *parent, Qt::WindowFlags flags )
214 : QDialog( parent, flags )
215{
216 setObjectName( QStringLiteral( "QgsProcessingHelpEditorDialog" ) );
217
218 QVBoxLayout *vLayout = new QVBoxLayout();
219 mWidget = new QgsProcessingHelpEditorWidget();
220 vLayout->addWidget( mWidget, 1 );
221
222 QDialogButtonBox *buttonBox = new QDialogButtonBox( QDialogButtonBox::Ok | QDialogButtonBox::Cancel );
223 connect( buttonBox, &QDialogButtonBox::accepted, this, &QDialog::accept );
224 connect( buttonBox, &QDialogButtonBox::rejected, this, &QDialog::reject );
225 vLayout->addWidget( buttonBox );
226 setLayout( vLayout );
227
229}
230
231void QgsProcessingHelpEditorDialog::setAlgorithm( const QgsProcessingAlgorithm *algorithm )
232{
233 mWidget->setAlgorithm( algorithm );
234}
235
236QVariantMap QgsProcessingHelpEditorDialog::helpContent()
237{
238 return mWidget->helpContent();
239}
240
241
243
static void enableAutoGeometryRestore(QWidget *widget, const QString &key=QString())
Register the widget to allow its position to be automatically saved and restored when open and closed...
Definition qgsgui.cpp:194
Abstract base class for processing algorithms.
QgsProcessingAlgorithm * create(const QVariantMap &configuration=QVariantMap()) const
Creates a copy of the algorithm, ready for execution.
Base class for the definition of processing outputs.
Base class for the definition of processing parameters.
@ FlagHidden
Parameter is hidden and should not be shown to users.
static QString formatHelpMapAsHtml(const QVariantMap &map, const QgsProcessingAlgorithm *algorithm)
Returns a HTML formatted version of the help text encoded in a variant map for a specified algorithm.
void textChanged()
Emitted when the text contents are changed.
As part of the API refactoring and improvements which landed in the Processing API was substantially reworked from the x version This was done in order to allow much of the underlying Processing framework to be ported into allowing algorithms to be written in pure substantial changes are required in order to port existing x Processing algorithms for QGIS x The most significant changes are outlined not GeoAlgorithm For algorithms which operate on features one by consider subclassing the QgsProcessingFeatureBasedAlgorithm class This class allows much of the boilerplate code for looping over features from a vector layer to be bypassed and instead requires implementation of a processFeature method Ensure that your algorithm(or algorithm 's parent class) implements the new pure virtual createInstance(self) call