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qgsadvanceddigitizingdockwidget.cpp
1354 lines (1202 loc) · 42.8 KB
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qgsadvanceddigitizingdockwidget.cpp
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/***************************************************************************
qgsadvanceddigitizingdockwidget.cpp - dock for CAD tools
----------------------
begin : October 2014
copyright : (C) Denis Rouzaud
email : denis.rouzaud@gmail.com
***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include <QMenu>
#include <cmath>
#include "qgsadvanceddigitizingdockwidget.h"
#include "qgsadvanceddigitizingcanvasitem.h"
#include "qgsapplication.h"
#include "qgsexpression.h"
#include "qgslogger.h"
#include "qgsmapcanvas.h"
#include "qgsmaptoolcapture.h"
#include "qgsmaptooladvanceddigitizing.h"
#include "qgsmessagebaritem.h"
#include "qgspointxy.h"
#include "qgslinestring.h"
#include "qgsfocuswatcher.h"
#include "qgssettings.h"
#include "qgsproject.h"
struct EdgesOnlyFilter : public QgsPointLocator::MatchFilter
{
bool acceptMatch( const QgsPointLocator::Match &m ) override { return m.hasEdge(); }
};
bool QgsAdvancedDigitizingDockWidget::lineCircleIntersection( const QgsPointXY ¢er, const double radius, const QList<QgsPointXY> &segment, QgsPointXY &intersection )
{
Q_ASSERT( segment.count() == 2 );
// formula taken from http://mathworld.wolfram.com/Circle-LineIntersection.html
const double x1 = segment[0].x() - center.x();
const double y1 = segment[0].y() - center.y();
const double x2 = segment[1].x() - center.x();
const double y2 = segment[1].y() - center.y();
const double dx = x2 - x1;
const double dy = y2 - y1;
const double dr = std::sqrt( std::pow( dx, 2 ) + std::pow( dy, 2 ) );
const double d = x1 * y2 - x2 * y1;
const double disc = std::pow( radius, 2 ) * std::pow( dr, 2 ) - std::pow( d, 2 );
if ( disc < 0 )
{
//no intersection or tangent
return false;
}
else
{
// two solutions
const int sgnDy = dy < 0 ? -1 : 1;
const double ax = center.x() + ( d * dy + sgnDy * dx * std::sqrt( std::pow( radius, 2 ) * std::pow( dr, 2 ) - std::pow( d, 2 ) ) ) / ( std::pow( dr, 2 ) );
const double ay = center.y() + ( -d * dx + std::fabs( dy ) * std::sqrt( std::pow( radius, 2 ) * std::pow( dr, 2 ) - std::pow( d, 2 ) ) ) / ( std::pow( dr, 2 ) );
const QgsPointXY p1( ax, ay );
const double bx = center.x() + ( d * dy - sgnDy * dx * std::sqrt( std::pow( radius, 2 ) * std::pow( dr, 2 ) - std::pow( d, 2 ) ) ) / ( std::pow( dr, 2 ) );
const double by = center.y() + ( -d * dx - std::fabs( dy ) * std::sqrt( std::pow( radius, 2 ) * std::pow( dr, 2 ) - std::pow( d, 2 ) ) ) / ( std::pow( dr, 2 ) );
const QgsPointXY p2( bx, by );
// snap to nearest intersection
if ( intersection.sqrDist( p1 ) < intersection.sqrDist( p2 ) )
{
intersection.set( p1.x(), p1.y() );
}
else
{
intersection.set( p2.x(), p2.y() );
}
return true;
}
}
QgsAdvancedDigitizingDockWidget::QgsAdvancedDigitizingDockWidget( QgsMapCanvas *canvas, QWidget *parent )
: QgsDockWidget( parent )
, mMapCanvas( canvas )
, mCurrentMapToolSupportsCad( false )
, mCadEnabled( false )
, mConstructionMode( false )
, mCommonAngleConstraint( QgsSettings().value( QStringLiteral( "/Cad/CommonAngle" ), 90 ).toInt() )
, mSnappedToVertex( false )
, mSessionActive( false )
, mErrorMessage( nullptr )
{
setupUi( this );
mCadPaintItem = new QgsAdvancedDigitizingCanvasItem( canvas, this ) ;
mAngleConstraint.reset( new CadConstraint( mAngleLineEdit, mLockAngleButton, mRelativeAngleButton, mRepeatingLockAngleButton ) );
mDistanceConstraint.reset( new CadConstraint( mDistanceLineEdit, mLockDistanceButton, nullptr, mRepeatingLockDistanceButton ) );
mXConstraint.reset( new CadConstraint( mXLineEdit, mLockXButton, mRelativeXButton, mRepeatingLockXButton ) );
mYConstraint.reset( new CadConstraint( mYLineEdit, mLockYButton, mRelativeYButton, mRepeatingLockYButton ) );
mAdditionalConstraint = NoConstraint ;
mMapCanvas->installEventFilter( this );
mAngleLineEdit->installEventFilter( this );
mDistanceLineEdit->installEventFilter( this );
mXLineEdit->installEventFilter( this );
mYLineEdit->installEventFilter( this );
// this action is also used in the advanced digitizing tool bar
mEnableAction = new QAction( this );
mEnableAction->setText( tr( "Enable advanced digitizing tools" ) );
mEnableAction->setIcon( QgsApplication::getThemeIcon( QStringLiteral( "/cadtools/cad.svg" ) ) );
mEnableAction->setCheckable( true );
mEnabledButton->addAction( mEnableAction );
mEnabledButton->setDefaultAction( mEnableAction );
// Connect the UI to the event filter to update constraints
connect( mEnableAction, &QAction::triggered, this, &QgsAdvancedDigitizingDockWidget::activateCad );
connect( mConstructionModeButton, &QAbstractButton::clicked, this, &QgsAdvancedDigitizingDockWidget::setConstructionMode );
connect( mParallelButton, &QAbstractButton::clicked, this, &QgsAdvancedDigitizingDockWidget::additionalConstraintClicked );
connect( mPerpendicularButton, &QAbstractButton::clicked, this, &QgsAdvancedDigitizingDockWidget::additionalConstraintClicked );
connect( mLockAngleButton, &QAbstractButton::clicked, this, &QgsAdvancedDigitizingDockWidget::lockConstraint );
connect( mLockDistanceButton, &QAbstractButton::clicked, this, &QgsAdvancedDigitizingDockWidget::lockConstraint );
connect( mLockXButton, &QAbstractButton::clicked, this, &QgsAdvancedDigitizingDockWidget::lockConstraint );
connect( mLockYButton, &QAbstractButton::clicked, this, &QgsAdvancedDigitizingDockWidget::lockConstraint );
connect( mRelativeAngleButton, &QAbstractButton::clicked, this, &QgsAdvancedDigitizingDockWidget::setConstraintRelative );
connect( mRelativeXButton, &QAbstractButton::clicked, this, &QgsAdvancedDigitizingDockWidget::setConstraintRelative );
connect( mRelativeYButton, &QAbstractButton::clicked, this, &QgsAdvancedDigitizingDockWidget::setConstraintRelative );
connect( mRepeatingLockDistanceButton, &QAbstractButton::clicked, this, &QgsAdvancedDigitizingDockWidget::setConstraintRepeatingLock );
connect( mRepeatingLockAngleButton, &QAbstractButton::clicked, this, &QgsAdvancedDigitizingDockWidget::setConstraintRepeatingLock );
connect( mRepeatingLockXButton, &QAbstractButton::clicked, this, &QgsAdvancedDigitizingDockWidget::setConstraintRepeatingLock );
connect( mRepeatingLockYButton, &QAbstractButton::clicked, this, &QgsAdvancedDigitizingDockWidget::setConstraintRepeatingLock );
connect( mAngleLineEdit, &QLineEdit::returnPressed, this, [ = ]() { lockConstraint(); } );
connect( mDistanceLineEdit, &QLineEdit::returnPressed, this, [ = ]() { lockConstraint(); } );
connect( mXLineEdit, &QLineEdit::returnPressed, this, [ = ]() { lockConstraint(); } );
connect( mYLineEdit, &QLineEdit::returnPressed, this, [ = ]() { lockConstraint(); } );
connect( mAngleLineEdit, &QLineEdit::textEdited, this, &QgsAdvancedDigitizingDockWidget::constraintTextEdited );
connect( mDistanceLineEdit, &QLineEdit::textEdited, this, &QgsAdvancedDigitizingDockWidget::constraintTextEdited );
connect( mXLineEdit, &QLineEdit::textEdited, this, &QgsAdvancedDigitizingDockWidget::constraintTextEdited );
connect( mYLineEdit, &QLineEdit::textEdited, this, &QgsAdvancedDigitizingDockWidget::constraintTextEdited );
//also watch for focus out events on these widgets
QgsFocusWatcher *angleWatcher = new QgsFocusWatcher( mAngleLineEdit );
connect( angleWatcher, &QgsFocusWatcher::focusOut, this, &QgsAdvancedDigitizingDockWidget::constraintFocusOut );
QgsFocusWatcher *distanceWatcher = new QgsFocusWatcher( mDistanceLineEdit );
connect( distanceWatcher, &QgsFocusWatcher::focusOut, this, &QgsAdvancedDigitizingDockWidget::constraintFocusOut );
QgsFocusWatcher *xWatcher = new QgsFocusWatcher( mXLineEdit );
connect( xWatcher, &QgsFocusWatcher::focusOut, this, &QgsAdvancedDigitizingDockWidget::constraintFocusOut );
QgsFocusWatcher *yWatcher = new QgsFocusWatcher( mYLineEdit );
connect( yWatcher, &QgsFocusWatcher::focusOut, this, &QgsAdvancedDigitizingDockWidget::constraintFocusOut );
// config menu
QMenu *menu = new QMenu( this );
// common angles
QActionGroup *angleButtonGroup = new QActionGroup( menu ); // actions are exclusive for common angles
mCommonAngleActions = QMap<QAction *, int>();
QList< QPair< int, QString > > commonAngles;
commonAngles << QPair<int, QString>( 0, trUtf8( "Do not snap to common angles" ) );
commonAngles << QPair<int, QString>( 30, trUtf8( "Snap to 30° angles" ) );
commonAngles << QPair<int, QString>( 45, trUtf8( "Snap to 45° angles" ) );
commonAngles << QPair<int, QString>( 90, trUtf8( "Snap to 90° angles" ) );
for ( QList< QPair< int, QString > >::const_iterator it = commonAngles.constBegin(); it != commonAngles.constEnd(); ++it )
{
QAction *action = new QAction( it->second, menu );
action->setCheckable( true );
action->setChecked( it->first == mCommonAngleConstraint );
menu->addAction( action );
angleButtonGroup->addAction( action );
mCommonAngleActions.insert( action, it->first );
}
mSettingsButton->setMenu( menu );
connect( mSettingsButton, SIGNAL( triggered( QAction * ) ), this, SLOT( settingsButtonTriggered( QAction * ) ) );
// set tooltips
mConstructionModeButton->setToolTip( "<b>" + tr( "Construction mode" ) + "</b><br>(" + tr( "press c to toggle on/off" ) + ")" );
mDistanceLineEdit->setToolTip( "<b>" + tr( "Distance" ) + "</b><br>(" + tr( "press d for quick access" ) + ")" );
mLockDistanceButton->setToolTip( "<b>" + tr( "Lock distance" ) + "</b><br>(" + tr( "press Ctrl + d for quick access" ) + ")" );
mRepeatingLockDistanceButton->setToolTip( "<b>" + tr( "Continuously lock distance" ) + "</b>" );
mRelativeAngleButton->setToolTip( "<b>" + tr( "Toggles relative angle to previous segment" ) + "</b><br>(" + tr( "press Shift + a for quick access" ) + ")" );
mAngleLineEdit->setToolTip( "<b>" + tr( "Angle" ) + "</b><br>(" + tr( "press a for quick access" ) + ")" );
mLockAngleButton->setToolTip( "<b>" + tr( "Lock angle" ) + "</b><br>(" + tr( "press Ctrl + a for quick access" ) + ")" );
mRepeatingLockAngleButton->setToolTip( "<b>" + tr( "Continuously lock angle" ) + "</b>" );
mRelativeXButton->setToolTip( "<b>" + tr( "Toggles relative x to previous node" ) + "</b><br>(" + tr( "press Shift + x for quick access" ) + ")" );
mXLineEdit->setToolTip( "<b>" + tr( "X coordinate" ) + "</b><br>(" + tr( "press x for quick access" ) + ")" );
mLockXButton->setToolTip( "<b>" + tr( "Lock x coordinate" ) + "</b><br>(" + tr( "press Ctrl + x for quick access" ) + ")" );
mRepeatingLockXButton->setToolTip( "<b>" + tr( "Continuously lock x coordinate" ) + "</b>" );
mRelativeYButton->setToolTip( "<b>" + tr( "Toggles relative y to previous node" ) + "</b><br>(" + tr( "press Shift + y for quick access" ) + ")" );
mYLineEdit->setToolTip( "<b>" + tr( "Y coordinate" ) + "</b><br>(" + tr( "press y for quick access" ) + ")" );
mLockYButton->setToolTip( "<b>" + tr( "Lock y coordinate" ) + "</b><br>(" + tr( "press Ctrl + y for quick access" ) + ")" );
mRepeatingLockYButton->setToolTip( "<b>" + tr( "Continuously lock y coordinate" ) + "</b>" );
updateCapacity( true );
connect( QgsProject::instance(), &QgsProject::snappingConfigChanged, this, [ = ] { updateCapacity( true ); } );
disable();
}
void QgsAdvancedDigitizingDockWidget::hideEvent( QHideEvent * )
{
// disable CAD but do not unset map event filter
// so it will be reactivated whenever the map tool is show again
setCadEnabled( false );
}
void QgsAdvancedDigitizingDockWidget::setCadEnabled( bool enabled )
{
mCadEnabled = enabled;
mEnableAction->setChecked( enabled );
mCadButtons->setEnabled( enabled );
mInputWidgets->setEnabled( enabled );
clear();
setConstructionMode( false );
}
void QgsAdvancedDigitizingDockWidget::activateCad( bool enabled )
{
enabled &= mCurrentMapToolSupportsCad;
mSessionActive = enabled;
if ( enabled && !isVisible() )
{
show();
}
setCadEnabled( enabled );
}
void QgsAdvancedDigitizingDockWidget::additionalConstraintClicked( bool activated )
{
if ( !activated )
{
lockAdditionalConstraint( NoConstraint );
}
if ( sender() == mParallelButton )
{
lockAdditionalConstraint( Parallel );
}
else if ( sender() == mPerpendicularButton )
{
lockAdditionalConstraint( Perpendicular );
}
}
void QgsAdvancedDigitizingDockWidget::setConstraintRelative( bool activate )
{
if ( sender() == mRelativeAngleButton )
{
mAngleConstraint->setRelative( activate );
}
else if ( sender() == mRelativeXButton )
{
mXConstraint->setRelative( activate );
}
else if ( sender() == mRelativeYButton )
{
mYConstraint->setRelative( activate );
}
}
void QgsAdvancedDigitizingDockWidget::setConstraintRepeatingLock( bool activate )
{
if ( sender() == mRepeatingLockDistanceButton )
{
mDistanceConstraint->setRepeatingLock( activate );
}
else if ( sender() == mRepeatingLockAngleButton )
{
mAngleConstraint->setRepeatingLock( activate );
}
else if ( sender() == mRepeatingLockXButton )
{
mXConstraint->setRepeatingLock( activate );
}
else if ( sender() == mRepeatingLockYButton )
{
mYConstraint->setRepeatingLock( activate );
}
}
void QgsAdvancedDigitizingDockWidget::setConstructionMode( bool enabled )
{
mConstructionMode = enabled;
mConstructionModeButton->setChecked( enabled );
}
void QgsAdvancedDigitizingDockWidget::settingsButtonTriggered( QAction *action )
{
// common angles
QMap<QAction *, int>::const_iterator ica = mCommonAngleActions.constFind( action );
if ( ica != mCommonAngleActions.constEnd() )
{
ica.key()->setChecked( true );
mCommonAngleConstraint = ica.value();
QgsSettings().setValue( QStringLiteral( "/Cad/CommonAngle" ), ica.value() );
return;
}
}
void QgsAdvancedDigitizingDockWidget::releaseLocks( bool releaseRepeatingLocks )
{
// release all locks except construction mode
lockAdditionalConstraint( NoConstraint );
if ( releaseRepeatingLocks || !mAngleConstraint->isRepeatingLock() )
mAngleConstraint->setLockMode( CadConstraint::NoLock );
if ( releaseRepeatingLocks || !mDistanceConstraint->isRepeatingLock() )
mDistanceConstraint->setLockMode( CadConstraint::NoLock );
if ( releaseRepeatingLocks || !mXConstraint->isRepeatingLock() )
mXConstraint->setLockMode( CadConstraint::NoLock );
if ( releaseRepeatingLocks || !mYConstraint->isRepeatingLock() )
mYConstraint->setLockMode( CadConstraint::NoLock );
}
#if 0
void QgsAdvancedDigitizingDockWidget::emit pointChanged()
{
// run a fake map mouse event to update the paint item
QPoint globalPos = mMapCanvas->cursor().pos();
QPoint pos = mMapCanvas->mapFromGlobal( globalPos );
QMouseEvent *e = new QMouseEvent( QEvent::MouseMove, pos, globalPos, Qt::NoButton, Qt::NoButton, Qt::NoModifier );
mCurrentMapTool->canvasMoveEvent( e );
}
#endif
QgsAdvancedDigitizingDockWidget::CadConstraint *QgsAdvancedDigitizingDockWidget::objectToConstraint( const QObject *obj ) const
{
CadConstraint *constraint = nullptr;
if ( obj == mAngleLineEdit || obj == mLockAngleButton )
{
constraint = mAngleConstraint.get();
}
else if ( obj == mDistanceLineEdit || obj == mLockDistanceButton )
{
constraint = mDistanceConstraint.get();
}
else if ( obj == mXLineEdit || obj == mLockXButton )
{
constraint = mXConstraint.get();
}
else if ( obj == mYLineEdit || obj == mLockYButton )
{
constraint = mYConstraint.get();
}
return constraint;
}
double QgsAdvancedDigitizingDockWidget::parseUserInput( const QString &inputValue, bool &ok ) const
{
ok = false;
double value = inputValue.toDouble( &ok );
if ( ok )
{
return value;
}
else
{
// try to evaluate expression
QgsExpression expr( inputValue );
QVariant result = expr.evaluate();
if ( expr.hasEvalError() )
ok = false;
else
value = result.toDouble( &ok );
return value;
}
}
void QgsAdvancedDigitizingDockWidget::updateConstraintValue( CadConstraint *constraint, const QString &textValue, bool convertExpression )
{
if ( !constraint || textValue.isEmpty() )
{
return;
}
if ( constraint->lockMode() == CadConstraint::NoLock )
return;
bool ok;
double value = parseUserInput( textValue, ok );
if ( !ok )
return;
constraint->setValue( value, convertExpression );
// run a fake map mouse event to update the paint item
emit pointChanged( mCadPointList.value( 0 ) );
}
void QgsAdvancedDigitizingDockWidget::lockConstraint( bool activate /* default true */ )
{
CadConstraint *constraint = objectToConstraint( sender() );
if ( !constraint )
{
return;
}
if ( activate )
{
QString textValue = constraint->lineEdit()->text();
if ( !textValue.isEmpty() )
{
bool ok;
double value = parseUserInput( textValue, ok );
if ( ok )
{
constraint->setValue( value );
}
else
{
activate = false;
}
}
else
{
activate = false;
}
}
constraint->setLockMode( activate ? CadConstraint::HardLock : CadConstraint::NoLock );
if ( activate )
{
// deactivate perpendicular/parallel if angle has been activated
if ( constraint == mAngleConstraint.get() )
{
lockAdditionalConstraint( NoConstraint );
}
// run a fake map mouse event to update the paint item
emit pointChanged( mCadPointList.value( 0 ) );
}
}
void QgsAdvancedDigitizingDockWidget::constraintTextEdited( const QString &textValue )
{
CadConstraint *constraint = objectToConstraint( sender() );
if ( !constraint )
{
return;
}
updateConstraintValue( constraint, textValue, false );
}
void QgsAdvancedDigitizingDockWidget::constraintFocusOut()
{
QLineEdit *lineEdit = qobject_cast< QLineEdit * >( sender()->parent() );
if ( !lineEdit )
return;
CadConstraint *constraint = objectToConstraint( lineEdit );
if ( !constraint )
{
return;
}
updateConstraintValue( constraint, lineEdit->text(), true );
}
void QgsAdvancedDigitizingDockWidget::lockAdditionalConstraint( AdditionalConstraint constraint )
{
mAdditionalConstraint = constraint;
mPerpendicularButton->setChecked( constraint == Perpendicular );
mParallelButton->setChecked( constraint == Parallel );
}
void QgsAdvancedDigitizingDockWidget::updateCapacity( bool updateUIwithoutChange )
{
CadCapacities newCapacities = 0;
// first point is the mouse point (it doesn't count)
if ( mCadPointList.count() > 1 )
{
newCapacities |= AbsoluteAngle | RelativeCoordinates;
}
if ( mCadPointList.count() > 2 )
{
newCapacities |= RelativeAngle;
}
if ( !updateUIwithoutChange && newCapacities == mCapacities )
{
return;
}
bool snappingEnabled = QgsProject::instance()->snappingConfig().enabled();
// update the UI according to new capacities
// still keep the old to compare
bool relativeAngle = mCadEnabled && newCapacities.testFlag( RelativeAngle );
bool absoluteAngle = mCadEnabled && newCapacities.testFlag( AbsoluteAngle );
bool relativeCoordinates = mCadEnabled && newCapacities.testFlag( RelativeCoordinates );
mPerpendicularButton->setEnabled( absoluteAngle && snappingEnabled );
mParallelButton->setEnabled( absoluteAngle && snappingEnabled );
//update tooltips on buttons
if ( !snappingEnabled )
{
mPerpendicularButton->setToolTip( tr( "Snapping must be enabled to utilize perpendicular mode" ) );
mParallelButton->setToolTip( tr( "Snapping must be enabled to utilize parallel mode" ) );
}
else
{
mPerpendicularButton->setToolTip( "<b>" + tr( "Perpendicular" ) + "</b><br>(" + tr( "press p to switch between perpendicular, parallel and normal mode" ) + ")" );
mParallelButton->setToolTip( "<b>" + tr( "Parallel" ) + "</b><br>(" + tr( "press p to switch between perpendicular, parallel and normal mode" ) + ")" );
}
if ( !absoluteAngle )
{
lockAdditionalConstraint( NoConstraint );
}
// absolute angle = azimuth, relative = from previous line
mLockAngleButton->setEnabled( absoluteAngle );
mRelativeAngleButton->setEnabled( relativeAngle );
mAngleLineEdit->setEnabled( absoluteAngle );
if ( !absoluteAngle )
{
mAngleConstraint->setLockMode( CadConstraint::NoLock );
}
if ( !relativeAngle )
{
mAngleConstraint->setRelative( false );
}
else if ( relativeAngle && !mCapacities.testFlag( RelativeAngle ) )
{
// set angle mode to relative if can do and wasn't available before
mAngleConstraint->setRelative( true );
}
// distance is alway relative
mLockDistanceButton->setEnabled( relativeCoordinates );
mDistanceLineEdit->setEnabled( relativeCoordinates );
if ( !relativeCoordinates )
{
mDistanceConstraint->setLockMode( CadConstraint::NoLock );
}
mRelativeXButton->setEnabled( relativeCoordinates );
mRelativeYButton->setEnabled( relativeCoordinates );
// update capacities
mCapacities = newCapacities;
}
bool QgsAdvancedDigitizingDockWidget::applyConstraints( QgsMapMouseEvent *e )
{
bool res = true;
QgsDebugMsgLevel( "Constraints (locked / relative / value", 4 );
QgsDebugMsgLevel( QString( "Angle: %1 %2 %3" ).arg( mAngleConstraint->isLocked() ).arg( mAngleConstraint->relative() ).arg( mAngleConstraint->value() ), 4 );
QgsDebugMsgLevel( QString( "Distance: %1 %2 %3" ).arg( mDistanceConstraint->isLocked() ).arg( mDistanceConstraint->relative() ).arg( mDistanceConstraint->value() ), 4 );
QgsDebugMsgLevel( QString( "X: %1 %2 %3" ).arg( mXConstraint->isLocked() ).arg( mXConstraint->relative() ).arg( mXConstraint->value() ), 4 );
QgsDebugMsgLevel( QString( "Y: %1 %2 %3" ).arg( mYConstraint->isLocked() ).arg( mYConstraint->relative() ).arg( mYConstraint->value() ), 4 );
QgsPointXY point = e->snapPoint();
mSnappedSegment = e->snapSegment();
bool previousPointExist, penulPointExist;
QgsPointXY previousPt = previousPoint( &previousPointExist );
QgsPointXY penultimatePt = penultimatePoint( &penulPointExist );
// *****************************
// ---- X constraint
if ( mXConstraint->isLocked() )
{
if ( !mXConstraint->relative() )
{
point.setX( mXConstraint->value() );
}
else if ( mCapacities.testFlag( RelativeCoordinates ) )
{
point.setX( previousPt.x() + mXConstraint->value() );
}
if ( !mSnappedSegment.isEmpty() && !mXConstraint->isLocked() )
{
// intersect with snapped segment line at X ccordinate
const double dx = mSnappedSegment.at( 1 ).x() - mSnappedSegment.at( 0 ).x();
if ( dx == 0 )
{
point.setY( mSnappedSegment.at( 0 ).y() );
}
else
{
const double dy = mSnappedSegment.at( 1 ).y() - mSnappedSegment.at( 0 ).y();
point.setY( mSnappedSegment.at( 0 ).y() + ( dy * ( point.x() - mSnappedSegment.at( 0 ).x() ) ) / dx );
}
}
}
// *****************************
// ---- Y constraint
if ( mYConstraint->isLocked() )
{
if ( !mYConstraint->relative() )
{
point.setY( mYConstraint->value() );
}
else if ( mCapacities.testFlag( RelativeCoordinates ) )
{
point.setY( previousPt.y() + mYConstraint->value() );
}
if ( !mSnappedSegment.isEmpty() && !mYConstraint->isLocked() )
{
// intersect with snapped segment line at Y ccordinate
const double dy = mSnappedSegment.at( 1 ).y() - mSnappedSegment.at( 0 ).y();
if ( dy == 0 )
{
point.setX( mSnappedSegment.at( 0 ).x() );
}
else
{
const double dx = mSnappedSegment.at( 1 ).x() - mSnappedSegment.at( 0 ).x();
point.setX( mSnappedSegment.at( 0 ).x() + ( dx * ( point.y() - mSnappedSegment.at( 0 ).y() ) ) / dy );
}
}
}
// *****************************
// ---- Angle constraint
// input angles are in degrees
if ( mAngleConstraint->lockMode() == CadConstraint::SoftLock )
{
// reset the lock
mAngleConstraint->setLockMode( CadConstraint::NoLock );
}
if ( !mAngleConstraint->isLocked() && mCapacities.testFlag( AbsoluteAngle ) && mCommonAngleConstraint != 0 )
{
double commonAngle = mCommonAngleConstraint * M_PI / 180;
// see if soft common angle constraint should be performed
// only if not in HardLock mode
double softAngle = std::atan2( point.y() - previousPt.y(),
point.x() - previousPt.x() );
double deltaAngle = 0;
if ( mAngleConstraint->relative() && mCapacities.testFlag( RelativeAngle ) )
{
// compute the angle relative to the last segment (0° is aligned with last segment)
deltaAngle = std::atan2( previousPt.y() - penultimatePt.y(),
previousPt.x() - penultimatePt.x() );
softAngle -= deltaAngle;
}
int quo = std::round( softAngle / commonAngle );
if ( std::fabs( softAngle - quo * commonAngle ) * 180.0 * M_1_PI <= SOFT_CONSTRAINT_TOLERANCE_DEGREES )
{
// also check the distance in pixel to the line, otherwise it's too sticky at long ranges
softAngle = quo * commonAngle ;
// http://mathworld.wolfram.com/Point-LineDistance2-Dimensional.html
// use the direction vector (cos(a),sin(a)) from previous point. |x2-x1|=1 since sin2+cos2=1
const double dist = std::fabs( std::cos( softAngle + deltaAngle ) * ( previousPt.y() - point.y() )
- std::sin( softAngle + deltaAngle ) * ( previousPt.x() - point.x() ) );
if ( dist / mMapCanvas->mapSettings().mapUnitsPerPixel() < SOFT_CONSTRAINT_TOLERANCE_PIXEL )
{
mAngleConstraint->setLockMode( CadConstraint::SoftLock );
mAngleConstraint->setValue( 180.0 / M_PI * softAngle );
}
}
}
if ( mAngleConstraint->isLocked() )
{
double angleValue = mAngleConstraint->value() * M_PI / 180;
if ( mAngleConstraint->relative() && mCapacities.testFlag( RelativeAngle ) )
{
// compute the angle relative to the last segment (0° is aligned with last segment)
angleValue += std::atan2( previousPt.y() - penultimatePt.y(),
previousPt.x() - penultimatePt.x() );
}
double cosa = std::cos( angleValue );
double sina = std::sin( angleValue );
double v = ( point.x() - previousPt.x() ) * cosa + ( point.y() - previousPt.y() ) * sina ;
if ( mXConstraint->isLocked() && mYConstraint->isLocked() )
{
// do nothing if both X,Y are already locked
}
else if ( mXConstraint->isLocked() )
{
if ( qgsDoubleNear( cosa, 0.0 ) )
{
res = false;
}
else
{
double x = mXConstraint->value();
if ( !mXConstraint->relative() )
{
x -= previousPt.x();
}
point.setY( previousPt.y() + x * sina / cosa );
}
}
else if ( mYConstraint->isLocked() )
{
if ( qgsDoubleNear( sina, 0.0 ) )
{
res = false;
}
else
{
double y = mYConstraint->value();
if ( !mYConstraint->relative() )
{
y -= previousPt.y();
}
point.setX( previousPt.x() + y * cosa / sina );
}
}
else
{
point.setX( previousPt.x() + cosa * v );
point.setY( previousPt.y() + sina * v );
}
if ( !mSnappedSegment.isEmpty() && !mDistanceConstraint->isLocked() )
{
// magnetize to the intersection of the snapped segment and the lockedAngle
// line of previous point + locked angle
const double x1 = previousPt.x();
const double y1 = previousPt.y();
const double x2 = previousPt.x() + cosa;
const double y2 = previousPt.y() + sina;
// line of snapped segment
const double x3 = mSnappedSegment.at( 0 ).x();
const double y3 = mSnappedSegment.at( 0 ).y();
const double x4 = mSnappedSegment.at( 1 ).x();
const double y4 = mSnappedSegment.at( 1 ).y();
const double d = ( x1 - x2 ) * ( y3 - y4 ) - ( y1 - y2 ) * ( x3 - x4 );
// do not compute intersection if lines are almost parallel
// this threshold might be adapted
if ( std::fabs( d ) > 0.01 )
{
point.setX( ( ( x3 - x4 ) * ( x1 * y2 - y1 * x2 ) - ( x1 - x2 ) * ( x3 * y4 - y3 * x4 ) ) / d );
point.setY( ( ( y3 - y4 ) * ( x1 * y2 - y1 * x2 ) - ( y1 - y2 ) * ( x3 * y4 - y3 * x4 ) ) / d );
}
}
}
// *****************************
// ---- Distance constraint
if ( mDistanceConstraint->isLocked() && previousPointExist )
{
if ( mXConstraint->isLocked() || mYConstraint->isLocked() )
{
// perform both to detect errors in constraints
if ( mXConstraint->isLocked() )
{
const QList<QgsPointXY> verticalSegment = QList<QgsPointXY>()
<< QgsPointXY( mXConstraint->value(), point.y() )
<< QgsPointXY( mXConstraint->value(), point.y() + 1 );
res &= lineCircleIntersection( previousPt, mDistanceConstraint->value(), verticalSegment, point );
}
if ( mYConstraint->isLocked() )
{
const QList<QgsPointXY> horizontalSegment = QList<QgsPointXY>()
<< QgsPointXY( point.x(), mYConstraint->value() )
<< QgsPointXY( point.x() + 1, mYConstraint->value() );
res &= lineCircleIntersection( previousPt, mDistanceConstraint->value(), horizontalSegment, point );
}
}
else
{
const double dist = std::sqrt( point.sqrDist( previousPt ) );
if ( dist == 0 )
{
// handle case where mouse is over origin and distance constraint is enabled
// take arbitrary horizontal line
point.set( previousPt.x() + mDistanceConstraint->value(), previousPt.y() );
}
else
{
const double vP = mDistanceConstraint->value() / dist;
point.set( previousPt.x() + ( point.x() - previousPt.x() ) * vP,
previousPt.y() + ( point.y() - previousPt.y() ) * vP );
}
if ( !mSnappedSegment.isEmpty() && !mAngleConstraint->isLocked() )
{
// we will magnietize to the intersection of that segment and the lockedDistance !
res &= lineCircleIntersection( previousPt, mDistanceConstraint->value(), snappedSegment(), point );
}
}
}
// *****************************
// ---- calculate CAD values
QgsDebugMsgLevel( QString( "point: %1 %2" ).arg( point.x() ).arg( point.y() ), 4 );
QgsDebugMsgLevel( QString( "previous point: %1 %2" ).arg( previousPt.x() ).arg( previousPt.y() ), 4 );
QgsDebugMsgLevel( QString( "penultimate point: %1 %2" ).arg( penultimatePt.x() ).arg( penultimatePt.y() ), 4 );
//QgsDebugMsg( QString( "dx: %1 dy: %2" ).arg( point.x() - previousPt.x() ).arg( point.y() - previousPt.y() ) );
//QgsDebugMsg( QString( "ddx: %1 ddy: %2" ).arg( previousPt.x() - penultimatePt.x() ).arg( previousPt.y() - penultimatePt.y() ) );
// set the point coordinates in the map event
e->setMapPoint( point );
// update the point list
updateCurrentPoint( point );
// *****************************
// ---- update the GUI with the values
// --- angle
if ( !mAngleConstraint->isLocked() && previousPointExist )
{
double angle = 0.0;
if ( penulPointExist && mAngleConstraint->relative() )
{
// previous angle
angle = std::atan2( previousPt.y() - penultimatePt.y(),
previousPt.x() - penultimatePt.x() );
}
angle = ( std::atan2( point.y() - previousPt.y(),
point.x() - previousPt.x()
) - angle ) * 180 / M_PI;
// modulus
angle = std::fmod( angle, 360.0 );
mAngleConstraint->setValue( angle );
}
// --- distance
if ( !mDistanceConstraint->isLocked() && previousPointExist )
{
mDistanceConstraint->setValue( std::sqrt( previousPt.sqrDist( point ) ) );
}
// --- X
if ( !mXConstraint->isLocked() )
{
if ( previousPointExist && mXConstraint->relative() )
{
mXConstraint->setValue( point.x() - previousPt.x() );
}
else
{
mXConstraint->setValue( point.x() );
}
}
// --- Y
if ( !mYConstraint->isLocked() )
{
if ( previousPointExist && mYConstraint->relative() )
{
mYConstraint->setValue( point.y() - previousPt.y() );
}
else
{
mYConstraint->setValue( point.y() );
}
}
return res;
}
bool QgsAdvancedDigitizingDockWidget::alignToSegment( QgsMapMouseEvent *e, CadConstraint::LockMode lockMode )
{
if ( mAdditionalConstraint == NoConstraint )
{
return false;
}
bool previousPointExist, penulPointExist, snappedSegmentExist;
QgsPointXY previousPt = previousPoint( &previousPointExist );
QgsPointXY penultimatePt = penultimatePoint( &penulPointExist );
mSnappedSegment = e->snapSegment( &snappedSegmentExist, true );
if ( !previousPointExist || !snappedSegmentExist )
{
return false;
}
double angle = std::atan2( mSnappedSegment[0].y() - mSnappedSegment[1].y(), mSnappedSegment[0].x() - mSnappedSegment[1].x() );
if ( mAngleConstraint->relative() && penulPointExist )
{
angle -= std::atan2( previousPt.y() - penultimatePt.y(), previousPt.x() - penultimatePt.x() );
}
if ( mAdditionalConstraint == Perpendicular )
{
angle += M_PI_2;
}
angle *= 180 / M_PI;
mAngleConstraint->setValue( angle );
mAngleConstraint->setLockMode( lockMode );
if ( lockMode == CadConstraint::HardLock )
{
mAdditionalConstraint = NoConstraint;
}
return true;
}
bool QgsAdvancedDigitizingDockWidget::canvasPressEvent( QgsMapMouseEvent *e )
{
applyConstraints( e );
return mCadEnabled && mConstructionMode;
}
bool QgsAdvancedDigitizingDockWidget::canvasReleaseEvent( QgsMapMouseEvent *e )
{
if ( !mCadEnabled )
return false;
emit popWarning();
if ( e->button() == Qt::RightButton )
{
clear();
return false;
}
applyConstraints( e );
if ( alignToSegment( e ) )
{
// launch a fake move event so rubber bands of map tools will be adapted with new constraints
// emit pointChanged( e );
// Parallel or perpendicular mode and snapped to segment
// this has emitted the lockAngle signal
return true;
}
addPoint( e->mapPoint() );
releaseLocks( false );
return mConstructionMode;
}
bool QgsAdvancedDigitizingDockWidget::canvasMoveEvent( QgsMapMouseEvent *e )
{
if ( !mCadEnabled )
return false;
if ( !applyConstraints( e ) )
{
emit pushWarning( tr( "Some constraints are incompatible. Resulting point might be incorrect." ) );
}
else
{
emit popWarning();
}
// perpendicular/parallel constraint
// do a soft lock when snapping to a segment
alignToSegment( e, CadConstraint::SoftLock );
mCadPaintItem->update();
return false;
}
bool QgsAdvancedDigitizingDockWidget::canvasKeyPressEventFilter( QKeyEvent *e )
{
// event on map tool
if ( !mCadEnabled )
return false;
switch ( e->key() )
{
case Qt::Key_Backspace:
case Qt::Key_Delete:
{
removePreviousPoint();
releaseLocks( false );
break;
}
case Qt::Key_Escape:
{
releaseLocks();
break;
}
default:
{
keyPressEvent( e );
break;
}
}
// for map tools, continues with key press in any case
return false;
}
void QgsAdvancedDigitizingDockWidget::clear()
{