QGIS API Documentation 3.35.0-Master (f6e073f0eed)
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qgsdatumtransformdialog.cpp
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1/***************************************************************************
2 qgsdatumtransformdialog.cpp
3 ---------------------------
4 begin : November 2013
5 copyright : (C) 2013 by Marco Hugentobler
6 email : marco.hugentobler at sourcepole dot ch
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
21#include "qgslogger.h"
22#include "qgssettings.h"
23#include "qgsproject.h"
24#include "qgsguiutils.h"
25#include "qgsgui.h"
26#include "qgshelp.h"
27
28#include <QDir>
29#include <QPushButton>
30
31#include "qgsprojutils.h"
32#include <proj.h>
33
34bool QgsDatumTransformDialog::run( const QgsCoordinateReferenceSystem &sourceCrs, const QgsCoordinateReferenceSystem &destinationCrs, QWidget *parent, QgsMapCanvas *mapCanvas, const QString &windowTitle )
35{
36 if ( sourceCrs == destinationCrs )
37 return true;
38
40 if ( context.hasTransform( sourceCrs, destinationCrs ) )
41 {
42 return true;
43 }
44
45 QgsDatumTransformDialog dlg( sourceCrs, destinationCrs, false, true, false, qMakePair( -1, -1 ), parent, Qt::WindowFlags(), QString(), mapCanvas );
46 if ( !windowTitle.isEmpty() )
47 dlg.setWindowTitle( windowTitle );
48
49 if ( dlg.shouldAskUserForSelection() )
50 {
51 if ( dlg.exec() )
52 {
60 return true;
61 }
62 else
63 {
64 return false;
65 }
66 }
67 else
68 {
69 dlg.applyDefaultTransform();
70 return true;
71 }
72}
73
75 const QgsCoordinateReferenceSystem &dCrs, const bool allowCrsChanges, const bool showMakeDefault, const bool forceChoice,
76 QPair<int, int> selectedDatumTransforms,
77 QWidget *parent,
78 Qt::WindowFlags f, const QString &selectedProj, QgsMapCanvas *mapCanvas, bool allowFallback )
79 : QDialog( parent, f )
80 , mPreviousCursorOverride( std::make_unique< QgsTemporaryCursorRestoreOverride >() ) // this dialog is often shown while cursor overrides are in place, so temporarily remove them
81{
82 setupUi( this );
83
84 QgsCoordinateReferenceSystem sourceCrs = sCrs;
85 QgsCoordinateReferenceSystem destinationCrs = dCrs;
86
88
89 if ( !showMakeDefault )
90 mCoordinateOperationsWidget->setShowMakeDefault( false );
91
92 if ( forceChoice )
93 {
94 mButtonBox->removeButton( mButtonBox->button( QDialogButtonBox::Cancel ) );
95 setWindowFlags( windowFlags() | Qt::CustomizeWindowHint );
96 setWindowFlags( windowFlags() & ~Qt::WindowCloseButtonHint );
97 }
98
99 if ( !sourceCrs.isValid() )
100 sourceCrs = QgsProject::instance()->crs();
101 if ( !sourceCrs.isValid() )
102 sourceCrs = QgsCoordinateReferenceSystem( QStringLiteral( "EPSG:4326" ) );
103 if ( !destinationCrs.isValid() )
104 destinationCrs = QgsProject::instance()->crs();
105 if ( !destinationCrs.isValid() )
106 destinationCrs = QgsCoordinateReferenceSystem( QStringLiteral( "EPSG:4326" ) );
107
108 mSourceProjectionSelectionWidget->setOptionVisible( QgsProjectionSelectionWidget::CrsNotSet, false );
109 mDestinationProjectionSelectionWidget->setOptionVisible( QgsProjectionSelectionWidget::CrsNotSet, false );
110
111 mSourceProjectionSelectionWidget->setCrs( sourceCrs );
112 mDestinationProjectionSelectionWidget->setCrs( destinationCrs );
113 if ( !allowCrsChanges )
114 {
115 mCrsStackedWidget->setCurrentIndex( 1 );
116 mSourceProjectionSelectionWidget->setEnabled( false );
117 mDestinationProjectionSelectionWidget->setEnabled( false );
118 mSourceCrsLabel->setText( QgsProjectionSelectionWidget::crsOptionText( sourceCrs ) );
119 mDestCrsLabel->setText( QgsProjectionSelectionWidget::crsOptionText( destinationCrs ) );
120 }
121
122 mCoordinateOperationsWidget->setMapCanvas( mapCanvas );
123
124 connect( mSourceProjectionSelectionWidget, &QgsProjectionSelectionWidget::crsChanged, this, &QgsDatumTransformDialog::setSourceCrs );
125 connect( mDestinationProjectionSelectionWidget, &QgsProjectionSelectionWidget::crsChanged, this, &QgsDatumTransformDialog::setDestinationCrs );
126
127 mCoordinateOperationsWidget->setSourceCrs( sourceCrs );
128 mCoordinateOperationsWidget->setDestinationCrs( destinationCrs );
129
130 connect( mButtonBox, &QDialogButtonBox::helpRequested, this, [ = ]
131 {
132 QgsHelp::openHelp( QStringLiteral( "working_with_projections/working_with_projections.html" ) );
133 } );
134
135 connect( mCoordinateOperationsWidget, &QgsCoordinateOperationWidget::operationChanged, this, &QgsDatumTransformDialog::operationChanged );
137 deets.proj = selectedProj;
138 deets.sourceTransformId = selectedDatumTransforms.first;
139 deets.destinationTransformId = selectedDatumTransforms.second;
140 deets.allowFallback = allowFallback;
141 mCoordinateOperationsWidget->setSelectedOperation( deets );
142
143 connect( mCoordinateOperationsWidget, &QgsCoordinateOperationWidget::operationDoubleClicked, this, [ = ]
144 {
145 if ( mCoordinateOperationsWidget->sourceCrs().isValid() && mCoordinateOperationsWidget->destinationCrs().isValid()
146 && mCoordinateOperationsWidget->selectedOperation().isAvailable )
147 accept();
148 } );
149}
150
151void QgsDatumTransformDialog::setOKButtonEnabled()
152{
153 mButtonBox->button( QDialogButtonBox::Ok )->setEnabled( mCoordinateOperationsWidget->sourceCrs().isValid() && mCoordinateOperationsWidget->destinationCrs().isValid()
154 && mCoordinateOperationsWidget->selectedOperation().isAvailable );
155}
156
158{
159 if ( mCoordinateOperationsWidget->makeDefaultSelected() && mCoordinateOperationsWidget->hasSelection() )
160 {
161 QgsSettings settings;
162 settings.beginGroup( QStringLiteral( "/Projections" ) );
163
165
166 const QString srcAuthId = dt.sourceCrs.authid();
167 const QString destAuthId = dt.destinationCrs.authid();
168 const int sourceDatumTransform = dt.sourceTransformId;
169 QString sourceDatumProj;
171 if ( sourceDatumTransform >= 0 )
172 sourceDatumProj = QgsDatumTransform::datumTransformToProj( sourceDatumTransform );
173 const int destinationDatumTransform = dt.destinationTransformId;
174 QString destinationDatumProj;
175 if ( destinationDatumTransform >= 0 )
176 destinationDatumProj = QgsDatumTransform::datumTransformToProj( destinationDatumTransform );
178 settings.setValue( srcAuthId + QStringLiteral( "//" ) + destAuthId + QStringLiteral( "_srcTransform" ), sourceDatumProj );
179 settings.setValue( srcAuthId + QStringLiteral( "//" ) + destAuthId + QStringLiteral( "_destTransform" ), destinationDatumProj );
180 settings.setValue( srcAuthId + QStringLiteral( "//" ) + destAuthId + QStringLiteral( "_coordinateOp" ), dt.proj );
181 settings.setValue( srcAuthId + QStringLiteral( "//" ) + destAuthId + QStringLiteral( "_allowFallback" ), dt.allowFallback );
182 }
183 QDialog::accept();
184}
185
187{
188 if ( !mButtonBox->button( QDialogButtonBox::Cancel ) )
189 return; // users HAVE to make a choice, no click on the dialog "x" to avoid this!
190
191 QDialog::reject();
192}
193
194bool QgsDatumTransformDialog::shouldAskUserForSelection() const
195{
196 if ( mCoordinateOperationsWidget->availableOperations().count() > 1 )
197 {
198 return QgsSettings().value( QStringLiteral( "/projections/promptWhenMultipleTransformsExist" ), false, QgsSettings::App ).toBool();
199 }
200 // TODO: show if transform grids are required, but missing
201 return false;
202}
203
204QgsDatumTransformDialog::TransformInfo QgsDatumTransformDialog::defaultDatumTransform() const
205{
206 TransformInfo preferred;
207 preferred.sourceCrs = mCoordinateOperationsWidget->sourceCrs();
208 preferred.destinationCrs = mCoordinateOperationsWidget->destinationCrs();
209 const QgsCoordinateOperationWidget::OperationDetails defaultOp = mCoordinateOperationsWidget->defaultOperation();
210 preferred.sourceTransformId = defaultOp.sourceTransformId;
211 preferred.destinationTransformId = defaultOp.destinationTransformId;
212 preferred.proj = defaultOp.proj;
213 return preferred;
214}
215
216void QgsDatumTransformDialog::applyDefaultTransform()
217{
218 if ( mCoordinateOperationsWidget->availableOperations().count() > 0 )
219 {
221 const TransformInfo dt = defaultDatumTransform();
223 context.addSourceDestinationDatumTransform( dt.sourceCrs, dt.destinationCrs, dt.sourceTransformId, dt.destinationTransformId );
225
226 // on proj 6 builds, removing a coordinate operation falls back to default
227 context.removeCoordinateOperation( dt.sourceCrs, dt.destinationCrs );
229 }
230}
231
233{
234 const QgsCoordinateOperationWidget::OperationDetails selected = mCoordinateOperationsWidget->selectedOperation();
235 TransformInfo sdt;
236 sdt.sourceCrs = mCoordinateOperationsWidget->sourceCrs();
237 sdt.destinationCrs = mCoordinateOperationsWidget->destinationCrs();
240 sdt.proj = selected.proj;
241 sdt.allowFallback = selected.allowFallback;
242 return sdt;
243}
244
245bool QgsDatumTransformDialog::gridShiftTransformation( const QString &itemText ) const
246{
247 return !itemText.isEmpty() && !itemText.contains( QLatin1String( "towgs84" ), Qt::CaseInsensitive );
248}
249
250void QgsDatumTransformDialog::operationChanged()
251{
252 setOKButtonEnabled();
253}
254
255void QgsDatumTransformDialog::setSourceCrs( const QgsCoordinateReferenceSystem &sourceCrs )
256{
257 mCoordinateOperationsWidget->setSourceCrs( sourceCrs );
258 setOKButtonEnabled();
259}
260
261void QgsDatumTransformDialog::setDestinationCrs( const QgsCoordinateReferenceSystem &destinationCrs )
262{
263 mCoordinateOperationsWidget->setDestinationCrs( destinationCrs );
264 setOKButtonEnabled();
265}
void operationChanged()
Emitted when the operation selected in the dialog is changed.
void operationDoubleClicked()
Emitted when an operation is double-clicked in the widget.
This class represents a coordinate reference system (CRS).
bool isValid() const
Returns whether this CRS is correctly initialized and usable.
Contains information about the context in which a coordinate transform is executed.
Q_DECL_DEPRECATED bool addSourceDestinationDatumTransform(const QgsCoordinateReferenceSystem &sourceCrs, const QgsCoordinateReferenceSystem &destinationCrs, int sourceTransformId, int destinationTransformId)
Adds a new sourceTransform and destinationTransform to use when projecting coordinates from the speci...
bool addCoordinateOperation(const QgsCoordinateReferenceSystem &sourceCrs, const QgsCoordinateReferenceSystem &destinationCrs, const QString &coordinateOperationProjString, bool allowFallback=true)
Adds a new coordinateOperationProjString to use when projecting coordinates from the specified source...
void removeCoordinateOperation(const QgsCoordinateReferenceSystem &sourceCrs, const QgsCoordinateReferenceSystem &destinationCrs)
Removes the coordinate operation for the specified sourceCrs and destinationCrs.
bool hasTransform(const QgsCoordinateReferenceSystem &source, const QgsCoordinateReferenceSystem &destination) const
Returns true if the context has a valid coordinate operation to use when transforming from the specif...
QgsDatumTransformDialog(const QgsCoordinateReferenceSystem &sourceCrs=QgsCoordinateReferenceSystem(), const QgsCoordinateReferenceSystem &destinationCrs=QgsCoordinateReferenceSystem(), bool allowCrsChanges=false, bool showMakeDefault=true, bool forceChoice=true, QPair< int, int > selectedDatumTransforms=qMakePair(-1, -1), QWidget *parent=nullptr, Qt::WindowFlags f=Qt::WindowFlags(), const QString &selectedProj=QString(), QgsMapCanvas *mapCanvas=nullptr, bool allowFallback=true)
Constructor for QgsDatumTransformDialog.
TransformInfo selectedDatumTransform()
Returns the source and destination transforms, each being a pair of QgsCoordinateReferenceSystems and...
static bool run(const QgsCoordinateReferenceSystem &sourceCrs=QgsCoordinateReferenceSystem(), const QgsCoordinateReferenceSystem &destinationCrs=QgsCoordinateReferenceSystem(), QWidget *parent=nullptr, QgsMapCanvas *mapCanvas=nullptr, const QString &windowTitle=QString())
Runs the dialog (if required) prompting for the desired transform to use from sourceCrs to destinatio...
static Q_DECL_DEPRECATED QString datumTransformToProj(int datumTransformId)
Returns a proj string representing the specified datumTransformId datum transform ID.
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
static void openHelp(const QString &key)
Opens help topic for the given help key using default system web browser.
Definition qgshelp.cpp:38
Map canvas is a class for displaying all GIS data types on a canvas.
static QgsProject * instance()
Returns the QgsProject singleton instance.
QgsCoordinateTransformContext transformContext
Definition qgsproject.h:113
QgsCoordinateReferenceSystem crs
Definition qgsproject.h:112
void setTransformContext(const QgsCoordinateTransformContext &context)
Sets the project's coordinate transform context, which stores various information regarding which dat...
void crsChanged(const QgsCoordinateReferenceSystem &)
Emitted when the selected CRS is changed.
@ CrsNotSet
Not set (hidden by default)
static QString crsOptionText(const QgsCoordinateReferenceSystem &crs)
Returns display text for the specified crs.
This class is a composition of two QSettings instances:
Definition qgssettings.h:64
QVariant value(const QString &key, const QVariant &defaultValue=QVariant(), Section section=NoSection) const
Returns the value for setting key.
void beginGroup(const QString &prefix, QgsSettings::Section section=QgsSettings::NoSection)
Appends prefix to the current group.
void setValue(const QString &key, const QVariant &value, QgsSettings::Section section=QgsSettings::NoSection)
Sets the value of setting key to value.
Temporarily removes all cursor overrides for the QApplication for the lifetime of the object.
#define Q_NOWARN_DEPRECATED_POP
Definition qgis.h:5713
#define Q_NOWARN_DEPRECATED_PUSH
Definition qgis.h:5712
bool allowFallback
true if fallback transforms can be used
QString proj
Proj coordinate operation description, for Proj >= 6.0 builds only.
Dialog transformation entry info.
int destinationTransformId
Destination transform ID.
QString proj
Proj coordinate operation description, for Proj >= 6.0 builds only.
QgsCoordinateReferenceSystem sourceCrs
Source coordinate reference system.
QgsCoordinateReferenceSystem destinationCrs
Destination coordinate reference system.
bool allowFallback
true if fallback transforms can be used