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qgsrulebased3drendererwidget.cpp
634 lines (517 loc) · 20.1 KB
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qgsrulebased3drendererwidget.cpp
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/***************************************************************************
qgsrulebased3drendererwidget.cpp
--------------------------------------
Date : January 2019
Copyright : (C) 2019 by Martin Dobias
Email : wonder dot sk at gmail dot 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 "qgsrulebased3drendererwidget.h"
#include "qgs3dutils.h"
#include "qgsexpressionbuilderdialog.h"
#include "qgslogger.h"
#include "qgsrulebased3drenderer.h"
#include "qgsvectorlayer.h"
#include "qgssymbol3dwidget.h"
#include "qgsapplication.h"
#include <QAction>
#include <QClipboard>
#include <QMessageBox>
QgsRuleBased3DRendererWidget::QgsRuleBased3DRendererWidget( QWidget *parent )
: QgsPanelWidget( parent )
{
setupUi( this );
btnAddRule->setIcon( QIcon( QgsApplication::iconPath( "symbologyAdd.svg" ) ) );
btnEditRule->setIcon( QIcon( QgsApplication::iconPath( "symbologyEdit.svg" ) ) );
btnRemoveRule->setIcon( QIcon( QgsApplication::iconPath( "symbologyRemove.svg" ) ) );
mCopyAction = new QAction( tr( "Copy" ), this );
mCopyAction->setShortcut( QKeySequence( QKeySequence::Copy ) );
mPasteAction = new QAction( tr( "Paste" ), this );
mPasteAction->setShortcut( QKeySequence( QKeySequence::Paste ) );
mDeleteAction = new QAction( tr( "Remove Rule" ), this );
mDeleteAction->setShortcut( QKeySequence( QKeySequence::Delete ) );
viewRules->addAction( mDeleteAction );
viewRules->addAction( mCopyAction );
viewRules->addAction( mPasteAction );
connect( viewRules, &QAbstractItemView::doubleClicked, this, static_cast<void ( QgsRuleBased3DRendererWidget::* )( const QModelIndex & )>( &QgsRuleBased3DRendererWidget::editRule ) );
connect( btnAddRule, &QAbstractButton::clicked, this, &QgsRuleBased3DRendererWidget::addRule );
connect( btnEditRule, &QAbstractButton::clicked, this, static_cast<void ( QgsRuleBased3DRendererWidget::* )()>( &QgsRuleBased3DRendererWidget::editRule ) );
connect( btnRemoveRule, &QAbstractButton::clicked, this, &QgsRuleBased3DRendererWidget::removeRule );
connect( mCopyAction, &QAction::triggered, this, &QgsRuleBased3DRendererWidget::copy );
connect( mPasteAction, &QAction::triggered, this, &QgsRuleBased3DRendererWidget::paste );
connect( mDeleteAction, &QAction::triggered, this, &QgsRuleBased3DRendererWidget::removeRule );
}
QgsRuleBased3DRendererWidget::~QgsRuleBased3DRendererWidget()
{
delete mRootRule;
}
void QgsRuleBased3DRendererWidget::setLayer( QgsVectorLayer *layer )
{
mLayer = layer;
QgsAbstract3DRenderer *r = layer->renderer3D();
if ( r && r->type() == QStringLiteral( "rulebased" ) )
{
QgsRuleBased3DRenderer *ruleRenderer = static_cast<QgsRuleBased3DRenderer *>( r );
mRootRule = ruleRenderer->rootRule()->clone();
}
else
{
// TODO: handle the special case when switching from single symbol renderer
mRootRule = new QgsRuleBased3DRenderer::Rule( nullptr );
}
mModel = new QgsRuleBased3DRendererModel( mRootRule );
viewRules->setModel( mModel );
connect( mModel, &QAbstractItemModel::dataChanged, this, &QgsRuleBased3DRendererWidget::widgetChanged );
connect( mModel, &QAbstractItemModel::rowsInserted, this, &QgsRuleBased3DRendererWidget::widgetChanged );
connect( mModel, &QAbstractItemModel::rowsRemoved, this, &QgsRuleBased3DRendererWidget::widgetChanged );
}
void QgsRuleBased3DRendererWidget::addRule()
{
QgsRuleBased3DRenderer::Rule *newrule = new QgsRuleBased3DRenderer::Rule( Qgs3DUtils::symbolForGeometryType( mLayer->geometryType() ).release() );
QgsRuleBased3DRenderer::Rule *current = currentRule();
if ( current )
{
// add after this rule
QModelIndex currentIndex = viewRules->selectionModel()->currentIndex();
mModel->insertRule( currentIndex.parent(), currentIndex.row() + 1, newrule );
QModelIndex newindex = mModel->index( currentIndex.row() + 1, 0, currentIndex.parent() );
viewRules->selectionModel()->setCurrentIndex( newindex, QItemSelectionModel::ClearAndSelect );
}
else
{
// append to root rule
int rows = mModel->rowCount();
mModel->insertRule( QModelIndex(), rows, newrule );
QModelIndex newindex = mModel->index( rows, 0 );
viewRules->selectionModel()->setCurrentIndex( newindex, QItemSelectionModel::ClearAndSelect );
}
editRule();
}
void QgsRuleBased3DRendererWidget::ruleWidgetPanelAccepted( QgsPanelWidget *panel )
{
Qgs3DRendererRulePropsWidget *widget = qobject_cast<Qgs3DRendererRulePropsWidget *>( panel );
widget->apply();
QModelIndex index = viewRules->selectionModel()->currentIndex();
mModel->updateRule( index.parent(), index.row() );
}
void QgsRuleBased3DRendererWidget::liveUpdateRuleFromPanel()
{
ruleWidgetPanelAccepted( qobject_cast<QgsPanelWidget *>( sender() ) );
}
void QgsRuleBased3DRendererWidget::editRule()
{
editRule( viewRules->selectionModel()->currentIndex() );
}
void QgsRuleBased3DRendererWidget::editRule( const QModelIndex &index )
{
if ( !index.isValid() )
return;
QgsRuleBased3DRenderer::Rule *rule = mModel->ruleForIndex( index );
Qgs3DRendererRulePropsWidget *widget = new Qgs3DRendererRulePropsWidget( rule, mLayer, this );
widget->setPanelTitle( tr( "Edit Rule" ) );
connect( widget, &QgsPanelWidget::panelAccepted, this, &QgsRuleBased3DRendererWidget::ruleWidgetPanelAccepted );
connect( widget, &Qgs3DRendererRulePropsWidget::widgetChanged, this, &QgsRuleBased3DRendererWidget::liveUpdateRuleFromPanel );
openPanel( widget );
}
void QgsRuleBased3DRendererWidget::removeRule()
{
QItemSelection sel = viewRules->selectionModel()->selection();
Q_FOREACH ( const QItemSelectionRange &range, sel )
{
if ( range.isValid() )
mModel->removeRows( range.top(), range.bottom() - range.top() + 1, range.parent() );
}
// make sure that the selection is gone
viewRules->selectionModel()->clear();
}
void QgsRuleBased3DRendererWidget::copy()
{
QModelIndexList indexlist = viewRules->selectionModel()->selectedRows();
if ( indexlist.isEmpty() )
return;
QMimeData *mime = mModel->mimeData( indexlist );
QApplication::clipboard()->setMimeData( mime );
}
void QgsRuleBased3DRendererWidget::paste()
{
const QMimeData *mime = QApplication::clipboard()->mimeData();
QModelIndexList indexlist = viewRules->selectionModel()->selectedRows();
QModelIndex index;
if ( indexlist.isEmpty() )
index = mModel->index( mModel->rowCount(), 0 );
else
index = indexlist.first();
mModel->dropMimeData( mime, Qt::CopyAction, index.row(), index.column(), index.parent() );
}
QgsRuleBased3DRenderer::Rule *QgsRuleBased3DRendererWidget::currentRule()
{
QItemSelectionModel *sel = viewRules->selectionModel();
QModelIndex idx = sel->currentIndex();
if ( !idx.isValid() )
return nullptr;
return mModel->ruleForIndex( idx );
}
////
QgsRuleBased3DRendererModel::QgsRuleBased3DRendererModel( QgsRuleBased3DRenderer::Rule *rootRule, QObject *parent )
: QAbstractItemModel( parent )
, mRootRule( rootRule )
{
}
Qt::ItemFlags QgsRuleBased3DRendererModel::flags( const QModelIndex &index ) const
{
if ( !index.isValid() )
return Qt::ItemIsDropEnabled;
// allow drop only at first column
Qt::ItemFlag drop = ( index.column() == 0 ? Qt::ItemIsDropEnabled : Qt::NoItemFlags );
Qt::ItemFlag checkable = ( index.column() == 0 ? Qt::ItemIsUserCheckable : Qt::NoItemFlags );
return Qt::ItemIsEnabled | Qt::ItemIsSelectable |
Qt::ItemIsEditable | checkable |
Qt::ItemIsDragEnabled | drop;
}
QVariant QgsRuleBased3DRendererModel::data( const QModelIndex &index, int role ) const
{
if ( !index.isValid() )
return QVariant();
QgsRuleBased3DRenderer::Rule *rule = ruleForIndex( index );
if ( role == Qt::DisplayRole || role == Qt::ToolTipRole )
{
switch ( index.column() )
{
case 0:
return rule->description();
case 1:
if ( rule->isElse() )
{
return "ELSE";
}
else
{
return rule->filterExpression().isEmpty() ? tr( "(no filter)" ) : rule->filterExpression();
}
default:
return QVariant();
}
}
else if ( role == Qt::DecorationRole && index.column() == 0 && rule->symbol() )
{
// TODO return QgsSymbolLayerUtils::symbolPreviewIcon( rule->symbol(), QSize( 16, 16 ) );
return QVariant();
}
else if ( role == Qt::TextAlignmentRole )
{
return Qt::AlignLeft;
}
else if ( role == Qt::FontRole && index.column() == 1 )
{
if ( rule->isElse() )
{
QFont italicFont;
italicFont.setItalic( true );
return italicFont;
}
return QVariant();
}
else if ( role == Qt::EditRole )
{
switch ( index.column() )
{
case 0:
return rule->description();
case 1:
return rule->filterExpression();
default:
return QVariant();
}
}
else if ( role == Qt::CheckStateRole )
{
if ( index.column() != 0 )
return QVariant();
return rule->active() ? Qt::Checked : Qt::Unchecked;
}
else
return QVariant();
}
QVariant QgsRuleBased3DRendererModel::headerData( int section, Qt::Orientation orientation, int role ) const
{
if ( orientation == Qt::Horizontal && role == Qt::DisplayRole && section >= 0 && section < 2 )
{
QStringList lst;
lst << tr( "Label" ) << tr( "Rule" ); // << tr( "Count" ) << tr( "Duplicate count" );
return lst[section];
}
return QVariant();
}
int QgsRuleBased3DRendererModel::rowCount( const QModelIndex &parent ) const
{
if ( parent.column() > 0 )
return 0;
QgsRuleBased3DRenderer::Rule *parentRule = ruleForIndex( parent );
return parentRule->children().count();
}
int QgsRuleBased3DRendererModel::columnCount( const QModelIndex & ) const
{
return 2;
}
QModelIndex QgsRuleBased3DRendererModel::index( int row, int column, const QModelIndex &parent ) const
{
if ( hasIndex( row, column, parent ) )
{
QgsRuleBased3DRenderer::Rule *parentRule = ruleForIndex( parent );
QgsRuleBased3DRenderer::Rule *childRule = parentRule->children()[row];
return createIndex( row, column, childRule );
}
return QModelIndex();
}
QModelIndex QgsRuleBased3DRendererModel::parent( const QModelIndex &index ) const
{
if ( !index.isValid() )
return QModelIndex();
QgsRuleBased3DRenderer::Rule *childRule = ruleForIndex( index );
QgsRuleBased3DRenderer::Rule *parentRule = childRule->parent();
if ( parentRule == mRootRule )
return QModelIndex();
// this is right: we need to know row number of our parent (in our grandparent)
int row = parentRule->parent()->children().indexOf( parentRule );
return createIndex( row, 0, parentRule );
}
bool QgsRuleBased3DRendererModel::setData( const QModelIndex &index, const QVariant &value, int role )
{
if ( !index.isValid() )
return false;
QgsRuleBased3DRenderer::Rule *rule = ruleForIndex( index );
if ( role == Qt::CheckStateRole )
{
rule->setActive( value.toInt() == Qt::Checked );
emit dataChanged( index, index );
return true;
}
if ( role != Qt::EditRole )
return false;
switch ( index.column() )
{
case 0: // description
rule->setDescription( value.toString() );
break;
case 1: // filter
rule->setFilterExpression( value.toString() );
break;
default:
return false;
}
emit dataChanged( index, index );
return true;
}
Qt::DropActions QgsRuleBased3DRendererModel::supportedDropActions() const
{
return Qt::MoveAction; // | Qt::CopyAction
}
QStringList QgsRuleBased3DRendererModel::mimeTypes() const
{
QStringList types;
types << QStringLiteral( "application/vnd.text.list" );
return types;
}
// manipulate DOM before dropping it so that rules are more useful
void _renderer2renderer3DRules( QDomElement &ruleElem )
{
// labeling rules recognize only "description"
if ( ruleElem.hasAttribute( QStringLiteral( "label" ) ) )
ruleElem.setAttribute( QStringLiteral( "description" ), ruleElem.attribute( QStringLiteral( "label" ) ) );
// run recursively
QDomElement childRuleElem = ruleElem.firstChildElement( QStringLiteral( "rule" ) );
while ( !childRuleElem.isNull() )
{
_renderer2renderer3DRules( childRuleElem );
childRuleElem = childRuleElem.nextSiblingElement( QStringLiteral( "rule" ) );
}
}
QMimeData *QgsRuleBased3DRendererModel::mimeData( const QModelIndexList &indexes ) const
{
QMimeData *mimeData = new QMimeData();
QByteArray encodedData;
QDataStream stream( &encodedData, QIODevice::WriteOnly );
Q_FOREACH ( const QModelIndex &index, indexes )
{
// each item consists of several columns - let's add it with just first one
if ( !index.isValid() || index.column() != 0 )
continue;
// we use a clone of the existing rule because it has a new unique rule key
// non-unique rule keys would confuse other components using them (e.g. legend)
QgsRuleBased3DRenderer::Rule *rule = ruleForIndex( index )->clone();
QDomDocument doc;
QDomElement rootElem = doc.createElement( QStringLiteral( "rule_mime" ) );
rootElem.setAttribute( QStringLiteral( "type" ), QStringLiteral( "labeling" ) ); // for determining whether rules are from renderer or labeling
QDomElement rulesElem = rule->save( doc, QgsReadWriteContext() );
rootElem.appendChild( rulesElem );
doc.appendChild( rootElem );
delete rule;
stream << doc.toString( -1 );
}
mimeData->setData( QStringLiteral( "application/vnd.text.list" ), encodedData );
return mimeData;
}
bool QgsRuleBased3DRendererModel::dropMimeData( const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent )
{
Q_UNUSED( column );
if ( action == Qt::IgnoreAction )
return true;
if ( !data->hasFormat( QStringLiteral( "application/vnd.text.list" ) ) )
return false;
if ( parent.column() > 0 )
return false;
QByteArray encodedData = data->data( QStringLiteral( "application/vnd.text.list" ) );
QDataStream stream( &encodedData, QIODevice::ReadOnly );
int rows = 0;
if ( row == -1 )
{
// the item was dropped at a parent - we may decide where to put the items - let's append them
row = rowCount( parent );
}
while ( !stream.atEnd() )
{
QString text;
stream >> text;
QDomDocument doc;
if ( !doc.setContent( text ) )
continue;
QDomElement rootElem = doc.documentElement();
if ( rootElem.tagName() != QLatin1String( "rule_mime" ) )
continue;
QDomElement ruleElem = rootElem.firstChildElement( QStringLiteral( "rule" ) );
if ( rootElem.attribute( QStringLiteral( "type" ) ) == QLatin1String( "renderer" ) )
_renderer2renderer3DRules( ruleElem ); // do some modifications so that we load the rules more nicely
QgsRuleBased3DRenderer::Rule *rule = QgsRuleBased3DRenderer::Rule::create( ruleElem, QgsReadWriteContext() );
insertRule( parent, row + rows, rule );
++rows;
}
return true;
}
bool QgsRuleBased3DRendererModel::removeRows( int row, int count, const QModelIndex &parent )
{
QgsRuleBased3DRenderer::Rule *parentRule = ruleForIndex( parent );
if ( row < 0 || row >= parentRule->children().count() )
return false;
beginRemoveRows( parent, row, row + count - 1 );
for ( int i = 0; i < count; i++ )
{
if ( row < parentRule->children().count() )
{
parentRule->removeChildAt( row );
}
else
{
QgsDebugMsg( QStringLiteral( "trying to remove invalid index - this should not happen!" ) );
}
}
endRemoveRows();
return true;
}
QgsRuleBased3DRenderer::Rule *QgsRuleBased3DRendererModel::ruleForIndex( const QModelIndex &index ) const
{
if ( index.isValid() )
return static_cast<QgsRuleBased3DRenderer::Rule *>( index.internalPointer() );
return mRootRule;
}
void QgsRuleBased3DRendererModel::insertRule( const QModelIndex &parent, int before, QgsRuleBased3DRenderer::Rule *newrule )
{
beginInsertRows( parent, before, before );
QgsRuleBased3DRenderer::Rule *parentRule = ruleForIndex( parent );
parentRule->insertChild( before, newrule );
endInsertRows();
}
void QgsRuleBased3DRendererModel::updateRule( const QModelIndex &parent, int row )
{
emit dataChanged( index( row, 0, parent ),
index( row, columnCount( parent ), parent ) );
}
/////////
Qgs3DRendererRulePropsWidget::Qgs3DRendererRulePropsWidget( QgsRuleBased3DRenderer::Rule *rule, QgsVectorLayer *layer, QWidget *parent )
: QgsPanelWidget( parent )
, mRule( rule )
, mLayer( layer )
{
setupUi( this );
mElseRadio->setChecked( mRule->isElse() );
mFilterRadio->setChecked( !mRule->isElse() );
editFilter->setText( mRule->filterExpression() );
editFilter->setToolTip( mRule->filterExpression() );
editDescription->setText( mRule->description() );
editDescription->setToolTip( mRule->description() );
if ( mRule->symbol() )
{
groupSymbol->setChecked( true );
mSymbol.reset( mRule->symbol()->clone() ); // use a clone!
}
else
{
groupSymbol->setChecked( false );
mSymbol = Qgs3DUtils::symbolForGeometryType( layer->geometryType() );
}
mSymbolWidget = new QgsSymbol3DWidget( this );
mSymbolWidget->setSymbol( mSymbol.get(), layer );
QVBoxLayout *l = new QVBoxLayout;
l->addWidget( mSymbolWidget );
groupSymbol->setLayout( l );
connect( btnExpressionBuilder, &QAbstractButton::clicked, this, &Qgs3DRendererRulePropsWidget::buildExpression );
connect( btnTestFilter, &QAbstractButton::clicked, this, &Qgs3DRendererRulePropsWidget::testFilter );
connect( editFilter, &QLineEdit::textEdited, this, &Qgs3DRendererRulePropsWidget::widgetChanged );
connect( editDescription, &QLineEdit::textChanged, this, &Qgs3DRendererRulePropsWidget::widgetChanged );
connect( groupSymbol, &QGroupBox::toggled, this, &Qgs3DRendererRulePropsWidget::widgetChanged );
connect( mSymbolWidget, &QgsSymbol3DWidget::widgetChanged, this, &Qgs3DRendererRulePropsWidget::widgetChanged );
connect( mFilterRadio, &QRadioButton::toggled, this, [ = ]( bool toggled ) { filterFrame->setEnabled( toggled ) ; } );
connect( mElseRadio, &QRadioButton::toggled, this, [ = ]( bool toggled ) { if ( toggled ) editFilter->setText( QStringLiteral( "ELSE" ) );} );
}
Qgs3DRendererRulePropsWidget::~Qgs3DRendererRulePropsWidget() = default;
void Qgs3DRendererRulePropsWidget::testFilter()
{
if ( !mFilterRadio->isChecked() )
return;
QgsExpression filter( editFilter->text() );
if ( filter.hasParserError() )
{
QMessageBox::critical( this, tr( "Test Filter" ), tr( "Filter expression parsing error:\n" ) + filter.parserErrorString() );
return;
}
QgsExpressionContext context( Qgs3DUtils::globalProjectLayerExpressionContext( mLayer ) );
if ( !filter.prepare( &context ) )
{
QMessageBox::critical( this, tr( "Test Filter" ), filter.evalErrorString() );
return;
}
QApplication::setOverrideCursor( Qt::WaitCursor );
QgsFeatureIterator fit = mLayer->getFeatures();
int count = 0;
QgsFeature f;
while ( fit.nextFeature( f ) )
{
context.setFeature( f );
QVariant value = filter.evaluate( &context );
if ( value.toInt() != 0 )
count++;
if ( filter.hasEvalError() )
break;
}
QApplication::restoreOverrideCursor();
QMessageBox::information( this, tr( "Test Filter" ), tr( "Filter returned %n feature(s)", "number of filtered features", count ) );
}
void Qgs3DRendererRulePropsWidget::buildExpression()
{
QgsExpressionContext context( Qgs3DUtils::globalProjectLayerExpressionContext( mLayer ) );
QgsExpressionBuilderDialog dlg( mLayer, editFilter->text(), this, QStringLiteral( "generic" ), context );
if ( dlg.exec() )
editFilter->setText( dlg.expressionText() );
}
void Qgs3DRendererRulePropsWidget::apply()
{
QString filter = mElseRadio->isChecked() ? QStringLiteral( "ELSE" ) : editFilter->text();
mRule->setFilterExpression( filter );
mRule->setDescription( editDescription->text() );
mRule->setSymbol( groupSymbol->isChecked() ? mSymbolWidget->symbol() : nullptr );
}