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qgsvertexeditor.cpp
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qgsvertexeditor.cpp
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/***************************************************************************
qgsvertexeditor.cpp
-----------------
begin : Tue Mar 24 2015
copyright : (C) 2015 Sandro Mani / Sourcepole AG
email : smani@sourcepole.ch
***************************************************************************/
/***************************************************************************
* *
* 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 "qgsvertexeditor.h"
#include "qgsmapcanvas.h"
#include "qgsmessagelog.h"
#include "qgsselectedfeature.h"
#include "qgsvertexentry.h"
#include "qgsvectorlayer.h"
#include "qgsgeometryutils.h"
#include "qgsproject.h"
#include "qgscoordinatetransform.h"
#include <QLabel>
#include <QTableWidget>
#include <QHeaderView>
#include <QVBoxLayout>
#include <QStyledItemDelegate>
#include <QKeyEvent>
#include <QLineEdit>
#include <QVector2D>
static const int MIN_RADIUS_ROLE = Qt::UserRole + 1;
QgsVertexEditorModel::QgsVertexEditorModel( QgsVectorLayer *layer, QgsSelectedFeature *selectedFeature, QgsMapCanvas *canvas, QObject *parent )
: QAbstractTableModel( parent )
, mLayer( layer )
, mSelectedFeature( selectedFeature )
, mCanvas( canvas )
, mHasZ( false )
, mHasM( false )
, mHasR( true ) //always show for now - avoids scanning whole feature for curves TODO - avoid this
, mZCol( -1 )
, mMCol( -1 )
, mRCol( -1 )
{
QgsWkbTypes::Type layerWKBType = mLayer->wkbType();
mHasZ = QgsWkbTypes::hasZ( layerWKBType );
mHasM = QgsWkbTypes::hasM( layerWKBType );
if ( mHasZ )
mZCol = 2;
if ( mHasM )
mMCol = 2 + ( mHasZ ? 1 : 0 );
if ( mHasR )
mRCol = 2 + ( mHasZ ? 1 : 0 ) + ( mHasM ? 1 : 0 );
QWidget *parentWidget = dynamic_cast< QWidget * >( parent );
if ( parentWidget )
{
mWidgetFont = parentWidget->font();
}
}
int QgsVertexEditorModel::rowCount( const QModelIndex &parent ) const
{
if ( parent.isValid() || !mSelectedFeature )
return 0;
return mSelectedFeature->vertexMap().count();
}
int QgsVertexEditorModel::columnCount( const QModelIndex &parent ) const
{
Q_UNUSED( parent );
return 2 + ( mHasZ ? 1 : 0 ) + ( mHasM ? 1 : 0 ) + ( mHasR ? 1 : 0 );
}
QVariant QgsVertexEditorModel::data( const QModelIndex &index, int role ) const
{
if ( !index.isValid() || !mSelectedFeature ||
( role != Qt::DisplayRole && role != Qt::EditRole && role != MIN_RADIUS_ROLE && role != Qt::FontRole ) )
return QVariant();
if ( index.row() >= mSelectedFeature->vertexMap().count() )
return QVariant();
if ( index.column() >= columnCount() )
return QVariant();
//get QgsVertexEntry for row
const QgsVertexEntry *vertex = mSelectedFeature->vertexMap().at( index.row() );
if ( !vertex )
{
return QVariant();
}
if ( role == Qt::FontRole )
{
double r = 0;
double minRadius = 0;
QFont font = mWidgetFont;
bool fontChanged = false;
if ( vertex->isSelected() )
{
font.setBold( true );
fontChanged = true;
}
if ( calcR( index.row(), r, minRadius ) )
{
font.setItalic( true );
fontChanged = true;;
}
if ( fontChanged )
{
return font;
}
else
{
return QVariant();
}
}
if ( role == MIN_RADIUS_ROLE )
{
if ( index.column() == mRCol )
{
double r = 0;
double minRadius = 0;
if ( calcR( index.row(), r, minRadius ) )
{
return minRadius;
}
}
return QVariant();
}
if ( index.column() == 0 )
return vertex->point().x();
else if ( index.column() == 1 )
return vertex->point().y();
else if ( index.column() == mZCol )
return vertex->point().z();
else if ( index.column() == mMCol )
return vertex->point().m();
else if ( index.column() == mRCol )
{
double r = 0;
double minRadius = 0;
if ( calcR( index.row(), r, minRadius ) )
{
return r;
}
return QVariant();
}
else
{
return QVariant();
}
}
QVariant QgsVertexEditorModel::headerData( int section, Qt::Orientation orientation, int role ) const
{
if ( role == Qt::DisplayRole )
{
if ( orientation == Qt::Vertical ) //row
{
return QVariant( section );
}
else
{
if ( section == 0 )
return QVariant( tr( "x" ) );
else if ( section == 1 )
return QVariant( tr( "y" ) );
else if ( section == mZCol )
return QVariant( tr( "z" ) );
else if ( section == mMCol )
return QVariant( tr( "m" ) );
else if ( section == mRCol )
return QVariant( tr( "r" ) );
else
return QVariant();
}
}
else
{
return QVariant();
}
}
bool QgsVertexEditorModel::setData( const QModelIndex &index, const QVariant &value, int role )
{
if ( !index.isValid() || role != Qt::EditRole )
{
return false;
}
if ( !mSelectedFeature || index.row() >= mSelectedFeature->vertexMap().count() )
{
return false;
}
// Get double value wrt current locale.
bool ok;
double doubleValue = QLocale().toDouble( value.toString(), &ok );
// If not valid and locale's decimal point is not '.' let's try with english locale
if ( ! ok && QLocale().decimalPoint() != '.' )
{
doubleValue = QLocale( QLocale::English ).toDouble( value.toString() );
}
double x = ( index.column() == 0 ? doubleValue : mSelectedFeature->vertexMap().at( index.row() )->point().x() );
double y = ( index.column() == 1 ? doubleValue : mSelectedFeature->vertexMap().at( index.row() )->point().y() );
if ( index.column() == mRCol ) // radius modified
{
if ( index.row() == 0 || index.row() >= mSelectedFeature->vertexMap().count() - 1 )
return false;
double x1 = mSelectedFeature->vertexMap().at( index.row() - 1 )->point().x();
double y1 = mSelectedFeature->vertexMap().at( index.row() - 1 )->point().y();
double x2 = x;
double y2 = y;
double x3 = mSelectedFeature->vertexMap().at( index.row() + 1 )->point().x();
double y3 = mSelectedFeature->vertexMap().at( index.row() + 1 )->point().y();
QgsPoint result;
if ( QgsGeometryUtils::segmentMidPoint( QgsPoint( x1, y1 ), QgsPoint( x3, y3 ), result, doubleValue, QgsPoint( x2, y2 ) ) )
{
x = result.x();
y = result.y();
}
}
double z = ( index.column() == mZCol ? value.toDouble() : mSelectedFeature->vertexMap().at( index.row() )->point().z() );
double m = ( index.column() == mMCol ? value.toDouble() : mSelectedFeature->vertexMap().at( index.row() )->point().m() );
QgsPoint p( QgsWkbTypes::PointZM, x, y, z, m );
mLayer->beginEditCommand( QObject::tr( "Moved vertices" ) );
mLayer->moveVertex( p, mSelectedFeature->featureId(), index.row() );
mLayer->endEditCommand();
mLayer->triggerRepaint();
return false;
}
Qt::ItemFlags QgsVertexEditorModel::flags( const QModelIndex &index ) const
{
Qt::ItemFlags flags = QAbstractTableModel::flags( index );
if ( index.isValid() )
{
return flags | Qt::ItemIsEditable;
}
else
{
return flags;
}
}
bool QgsVertexEditorModel::calcR( int row, double &r, double &minRadius ) const
{
if ( row <= 0 || !mSelectedFeature || row >= mSelectedFeature->vertexMap().count() - 1 )
return false;
const QgsVertexEntry *entry = mSelectedFeature->vertexMap().at( row );
bool curvePoint = ( entry->vertexId().type == QgsVertexId::CurveVertex );
if ( !curvePoint )
return false;
const QgsPoint &p1 = mSelectedFeature->vertexMap().at( row - 1 )->point();
const QgsPoint &p2 = mSelectedFeature->vertexMap().at( row )->point();
const QgsPoint &p3 = mSelectedFeature->vertexMap().at( row + 1 )->point();
double cx, cy;
QgsGeometryUtils::circleCenterRadius( p1, p2, p3, r, cx, cy );
double x13 = p3.x() - p1.x(), y13 = p3.y() - p1.y();
minRadius = 0.5 * std::sqrt( x13 * x13 + y13 * y13 );
return true;
}
QgsVertexEditor::QgsVertexEditor(
QgsVectorLayer *layer,
QgsSelectedFeature *selectedFeature,
QgsMapCanvas *canvas )
: mCanvas( canvas )
{
setWindowTitle( tr( "Vertex Editor" ) );
setObjectName( QStringLiteral( "VertexEditor" ) );
QWidget *content = new QWidget( this );
content->setMinimumHeight( 160 );
QVBoxLayout *layout = new QVBoxLayout( content );
layout->setContentsMargins( 0, 0, 0, 0 );
mHintLabel = new QLabel( this );
mHintLabel->setText( QStringLiteral( "%1\n\n%2" ).arg( tr( "Right click on the edge of an editable feature to show its table of vertices." ),
tr( "When a feature is bound to this panel, dragging a rectangle to select vertices on the canvas will only select those of the bound feature." ) ) );
mHintLabel->setWordWrap( true );
mHintLabel->setAlignment( Qt::AlignHCenter | Qt::AlignVCenter );
mTableView = new QTableView( this );
mTableView->setSelectionMode( QTableWidget::ExtendedSelection );
mTableView->setSelectionBehavior( QTableWidget::SelectRows );
mTableView->setItemDelegateForColumn( 0, new CoordinateItemDelegate( this ) );
mTableView->setItemDelegateForColumn( 1, new CoordinateItemDelegate( this ) );
mTableView->setItemDelegateForColumn( 2, new CoordinateItemDelegate( this ) );
mTableView->setItemDelegateForColumn( 3, new CoordinateItemDelegate( this ) );
mTableView->setItemDelegateForColumn( 4, new CoordinateItemDelegate( this ) );
mTableView->setVisible( false );
layout->addWidget( mTableView );
layout->addWidget( mHintLabel );
setWidget( content );
updateEditor( layer, selectedFeature );
}
void QgsVertexEditor::updateEditor( QgsVectorLayer *layer, QgsSelectedFeature *selectedFeature )
{
if ( mSelectedFeature )
{
delete mVertexModel;
}
mLayer = layer;
mSelectedFeature = selectedFeature;
if ( mLayer && mSelectedFeature )
{
// TODO We really should just update the model itself.
mVertexModel = new QgsVertexEditorModel( mLayer, mSelectedFeature, mCanvas, this );
mTableView->setModel( mVertexModel );
mHintLabel->setVisible( false );
mTableView->setVisible( true );
connect( mTableView->selectionModel(), &QItemSelectionModel::selectionChanged, this, &QgsVertexEditor::updateVertexSelection );
connect( mSelectedFeature, &QgsSelectedFeature::selectionChanged, this, &QgsVertexEditor::updateTableSelection );
}
else
{
mHintLabel->setVisible( true );
mTableView->setVisible( false );
}
}
void QgsVertexEditor::updateTableSelection()
{
if ( !mSelectedFeature || mUpdatingVertexSelection )
return;
mUpdatingTableSelection = true;
mTableView->selectionModel()->clearSelection();
const QList<QgsVertexEntry *> &vertexMap = mSelectedFeature->vertexMap();
int firstSelectedRow = -1;
QItemSelection selection;
for ( int i = 0, n = vertexMap.size(); i < n; ++i )
{
if ( vertexMap[i]->isSelected() )
{
if ( firstSelectedRow < 0 )
firstSelectedRow = i;
selection.select( mVertexModel->index( i, 0 ), mVertexModel->index( i, mVertexModel->columnCount() - 1 ) );
}
}
mTableView->selectionModel()->select( selection, QItemSelectionModel::Select );
if ( firstSelectedRow >= 0 )
mTableView->scrollTo( mVertexModel->index( firstSelectedRow, 0 ), QAbstractItemView::PositionAtTop );
mUpdatingTableSelection = false;
}
void QgsVertexEditor::updateVertexSelection( const QItemSelection &selected, const QItemSelection & )
{
if ( !mSelectedFeature || mUpdatingTableSelection )
return;
mUpdatingVertexSelection = true;
mSelectedFeature->deselectAllVertices();
QgsCoordinateTransform t( mLayer->crs(), mCanvas->mapSettings().destinationCrs(), QgsProject::instance() );
std::unique_ptr<QgsRectangle> bbox;
QModelIndexList indexList = selected.indexes();
for ( int i = 0; i < indexList.length(); ++i )
{
int vertexIdx = indexList.at( i ).row();
mSelectedFeature->selectVertex( vertexIdx );
// create a bounding box of selected vertices
QgsPointXY point( mSelectedFeature->vertexMap().at( vertexIdx )->point() );
if ( !bbox )
bbox.reset( new QgsRectangle( point, point ) );
else
bbox->combineExtentWith( point );
}
//ensure that newly selected vertices are visible in canvas
if ( bbox )
{
try
{
QgsRectangle transformedBbox = t.transform( *bbox );
QgsRectangle canvasExtent = mCanvas->mapSettings().extent();
transformedBbox.combineExtentWith( canvasExtent );
mCanvas->setExtent( transformedBbox );
}
catch ( QgsCsException &cse )
{
QgsMessageLog::logMessage( QObject::tr( "Simplify transform error caught: %1" ).arg( cse.what() ), QObject::tr( "CRS" ) );
}
}
mUpdatingVertexSelection = false;
}
void QgsVertexEditor::keyPressEvent( QKeyEvent *e )
{
if ( e->key() == Qt::Key_Backspace || e->key() == Qt::Key_Delete )
{
emit deleteSelectedRequested();
// Override default shortcut management in MapCanvas
e->ignore();
}
}
void QgsVertexEditor::closeEvent( QCloseEvent *event )
{
QgsDockWidget::closeEvent( event );
emit editorClosed();
}
//
// CoordinateItemDelegate
//
CoordinateItemDelegate::CoordinateItemDelegate( QObject *parent )
: QStyledItemDelegate( parent )
{
}
QString CoordinateItemDelegate::displayText( const QVariant &value, const QLocale &locale ) const
{
return locale.toString( value.toDouble(), 'f', 4 );
}
QWidget *CoordinateItemDelegate::createEditor( QWidget *parent, const QStyleOptionViewItem &, const QModelIndex &index ) const
{
QLineEdit *lineEdit = new QLineEdit( parent );
QDoubleValidator *validator = new QDoubleValidator();
if ( !index.data( MIN_RADIUS_ROLE ).isNull() )
validator->setBottom( index.data( MIN_RADIUS_ROLE ).toDouble() );
lineEdit->setValidator( validator );
return lineEdit;
}
void CoordinateItemDelegate::setModelData( QWidget *editor, QAbstractItemModel *model, const QModelIndex &index ) const
{
QLineEdit *lineEdit = qobject_cast<QLineEdit *>( editor );
if ( lineEdit->hasAcceptableInput() )
{
QStyledItemDelegate::setModelData( editor, model, index );
}
}