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jef-njef-n
committedNov 27, 2011
missed new files of 46bc34d
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ltr-3_40Before-merge-new_vector_api
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‎src/app/legend/qgslayerorder.cpp

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/***************************************************************************
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qgslayerorder.cpp - description
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-------------------
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begin : 2011-11-09
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copyright : (C) 2011 by Juergen E. Fischer, norBIT GmbH
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email : jef at norbit dot de
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#include "qgslayerorder.h"
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#include "qgsmapcanvas.h"
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#include "qgsmaplayer.h"
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#include "qgslogger.h"
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#include "qgslegend.h"
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#include "qgslegendlayer.h"
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#include "qgsproject.h"
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#include <QMouseEvent>
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#include <QTreeWidgetItem>
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QgsLayerOrder::QgsLayerOrder( QgsLegend *legend, QWidget * parent, const char *name )
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: QListWidget( parent )
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, mLegend( legend )
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, mPressItem( 0 )
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{
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setObjectName( name );
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// track visibility changed in legend
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connect( mLegend, SIGNAL( itemChanged( QTreeWidgetItem *, int ) ),
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this, SLOT( legendItemChanged( QTreeWidgetItem *, int ) ) );
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// track if legend mode changes
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connect( mLegend, SIGNAL( updateDrawingOrderChanged( bool ) ),
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this, SLOT( updateDrawingOrderChanged( bool ) ) );
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connect( mLegend, SIGNAL( zOrderChanged() ),
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this, SLOT( refreshLayerList() ) );
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connect( mLegend->canvas(), SIGNAL( layersChanged() ),
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this, SLOT( refreshLayerList() ) );
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// change visibility
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connect( this, SIGNAL( itemChanged( QListWidgetItem * ) ),
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this, SLOT( itemChanged( QListWidgetItem * ) ) );
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// Initialise the line indicator widget.
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mInsertionLine = new QWidget( viewport() );
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hideLine();
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mInsertionLine->setAutoFillBackground( true );
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QPalette pal = mInsertionLine->palette();
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pal.setColor( mInsertionLine->backgroundRole(), Qt::blue );
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mInsertionLine->setPalette( pal );
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mInsertRow = -1;
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setSortingEnabled( false );
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setSelectionMode( QAbstractItemView::ExtendedSelection );
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setDragEnabled( false );
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setAutoScroll( true );
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QFont f( "Arial", 12, QFont::Bold );
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setFont( f );
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QPalette palette;
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palette.setColor( backgroundRole(), QColor( 192, 192, 192 ) );
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setPalette( palette );
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updateDrawingOrderChanged( mLegend->updateDrawingOrder() );
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}
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QgsLayerOrder::~QgsLayerOrder()
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{
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delete mInsertionLine;
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}
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void QgsLayerOrder::refreshLayerList()
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{
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clear();
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foreach( QgsMapLayer *layer, mLegend->layers() )
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{
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QListWidgetItem *item = new QListWidgetItem( layer->name() );
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item->setData( Qt::UserRole, qVariantFromValue( qobject_cast<QObject*>( layer ) ) );
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item->setCheckState( mLegend->layerCheckState( layer ) );
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QgsDebugMsg( QString( "add item=%1 at %2" ).arg( item ? item->text() : "(null item)" ).arg( count() ) );
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addItem( item );
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}
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}
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QListWidgetItem *QgsLayerOrder::layerItem( QgsMapLayer *layer ) const
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{
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for ( int i = 0; i < count(); i++ )
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{
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QListWidgetItem *lwi = item( i );
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if ( layer == qobject_cast<QgsMapLayer *>( lwi->data( Qt::UserRole ).value<QObject*>() ) )
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{
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return lwi;
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}
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}
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return 0;
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}
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void QgsLayerOrder::itemChanged( QListWidgetItem *item )
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{
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QgsDebugMsg( "Entering." );
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QgsDebugMsg( QString( "item=%1" ).arg( item ? item->text() : "(null item)" ) );
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QgsMapLayer *layer = qobject_cast<QgsMapLayer *>( item->data( Qt::UserRole ).value<QObject*>() );
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mLegend->setLayerVisible( layer, item->checkState() == Qt::Checked );
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updateLayerOrder();
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}
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void QgsLayerOrder::legendItemChanged( QTreeWidgetItem *item, int col )
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{
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QgsDebugMsg( "Entering." );
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if ( col != 0 )
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return;
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QgsDebugMsg( QString( "legendItem changed=%1" ).arg( item ? item->text( 0 ) : "(null item)" ) );
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QgsLegendLayer *ll = dynamic_cast< QgsLegendLayer * >( item );
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if ( !ll )
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return;
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QListWidgetItem *lwi = layerItem( ll->layer() );
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if ( !lwi )
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return;
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lwi->setCheckState( item->checkState( col ) );
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}
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void QgsLayerOrder::mousePressEvent( QMouseEvent * e )
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{
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QgsDebugMsg( "Entering." );
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if ( e->button() == Qt::LeftButton )
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{
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mPressItem = itemAt( e->pos() );
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}
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QListWidget::mousePressEvent( e );
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}
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void QgsLayerOrder::mouseMoveEvent( QMouseEvent * e )
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{
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if ( !mPressItem || count() == 0 )
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return;
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// start moving when cursor leaves the current item
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if ( itemAt( e->pos() ) == mPressItem )
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return;
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hideLine();
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if ( mItemsBeingMoved.isEmpty() && !selectedItems().isEmpty() )
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{
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for ( int i = 0; i < count(); i++ )
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{
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QListWidgetItem *lwi = item( i );
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if ( lwi->isSelected() )
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{
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QgsDebugMsg( QString( "Take item %1:%2" ).arg( i ).arg( lwi->text() ) );
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mItemsBeingMoved << takeItem( i-- );
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}
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}
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setCursor( Qt::SizeVerCursor );
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}
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if ( mItemsBeingMoved.isEmpty() )
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{
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setCursor( Qt::ArrowCursor );
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mInsertRow = -1;
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}
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else
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{
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QListWidgetItem *rowItem = itemAt( e->pos() );
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if ( rowItem )
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{
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mInsertRow = row( rowItem );
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QgsDebugMsg( QString( "Move to row %1" ).arg( mInsertRow ) );
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}
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else if ( e->pos().y() < visualItemRect( item( 0 ) ).bottom() )
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{
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mInsertRow = 0;
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QgsDebugMsg( QString( "Insert top row %1" ).arg( mInsertRow ) );
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}
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else
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{
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mInsertRow = count();
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QgsDebugMsg( QString( "Append bottom row %1" ).arg( mInsertRow ) );
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}
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int y;
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if ( mInsertRow < count() )
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{
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y = visualItemRect( rowItem ).top();
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}
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else
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{
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y = visualItemRect( item( count() - 1 ) ).bottom();
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}
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mInsertionLine->setGeometry( visualItemRect( item( 0 ) ).left(), y, viewport()->width(), 2 );
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}
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}
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void QgsLayerOrder::mouseReleaseEvent( QMouseEvent * e )
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{
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QgsDebugMsg( "Entering." );
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QListWidget::mouseReleaseEvent( e );
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mPressItem = 0;
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hideLine();
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if ( mItemsBeingMoved.isEmpty() )
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return;
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setCursor( QCursor( Qt::ArrowCursor ) );
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foreach( QListWidgetItem *item, mItemsBeingMoved )
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{
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if ( mInsertRow >= count() )
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{
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QgsDebugMsg( QString( "Adding item at %1:%2" ).arg( mInsertRow ).arg( item->text() ) );
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addItem( item );
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}
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else
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{
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QgsDebugMsg( QString( "Inserting item at %1:%2" ).arg( mInsertRow ).arg( item->text() ) );
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insertItem( mInsertRow, item );
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}
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mInsertRow++;
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}
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mItemsBeingMoved.clear();
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mInsertRow = -1;
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updateLayerOrder();
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}
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void QgsLayerOrder::updateLayerOrder()
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{
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if ( !isEnabled() )
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return;
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QList<QgsMapLayer *> layers;
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for ( int i = 0; i < count(); i++ )
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{
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layers << qobject_cast<QgsMapLayer *>( item( i )->data( Qt::UserRole ).value<QObject*>() );
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}
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mLegend->setDrawingOrder( layers );
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}
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void QgsLayerOrder::hideLine()
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{
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mInsertionLine->setGeometry( 0, -100, 1, 1 );
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}
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void QgsLayerOrder::updateDrawingOrderChanged( bool enabled )
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{
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setDisabled( enabled );
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}

‎src/app/legend/qgslayerorder.h

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/***************************************************************************
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qgslayerorder.h - description
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-------------------
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begin : 2011-11-09
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copyright : (C) 2011 by Juergen E. Fischer, norBIT GmbH
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email : jef at norbit dot de
7+
***************************************************************************/
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9+
/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#ifndef QGSLAYERORDER_H
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#define QGSLAYERORDER_H
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#include <QListWidget>
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class QWidget;
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class QgsLegend;
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class QgsMapLayer;
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class QTreeWidgetItem;
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class QgsLayerOrder : public QListWidget
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{
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Q_OBJECT
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public:
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/*! Constructor.
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* @param legend link to legend
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* @param canvas link to canvas
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* @param parent An optional parent widget
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* @param name An optional name for the widget
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*/
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QgsLayerOrder( QgsLegend *legend, QWidget * parent = 0, const char *name = 0 );
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//! Destructor
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~QgsLayerOrder();
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protected:
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void mouseMoveEvent( QMouseEvent * e );
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void mousePressEvent( QMouseEvent * e );
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void mouseReleaseEvent( QMouseEvent * e );
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private slots:
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void updateDrawingOrderChanged( bool );
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void itemChanged( QListWidgetItem * );
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void legendItemChanged( QTreeWidgetItem *, int );
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void refreshLayerList();
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private:
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QListWidgetItem *layerItem( QgsMapLayer * ) const;
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void updateLayerOrder();
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void hideLine();
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QgsLegend *mLegend;
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QListWidgetItem *mPressItem;
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QList<QListWidgetItem*> mItemsBeingMoved;
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QWidget *mInsertionLine;
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int mInsertRow;
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};
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#endif

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