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qgslegendlayer.cpp
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qgslegendlayer.cpp
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/***************************************************************************
* Copyright (C) 2005 by Tim Sutton *
* aps02ts@macbuntu *
* *
* 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. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include "qgsapplication.h"
#include "qgisapp.h"
#include "qgslegend.h"
#include "qgslegendlayer.h"
#include "qgslegendlayerfile.h"
#include "qgslegendlayerfilegroup.h"
#include "qgslegendsymbologyitem.h"
#include "qgslogger.h"
#include "qgsapplication.h"
#include "qgsfield.h"
#include "qgsmaplayerregistry.h"
#include "qgsrasterlayer.h"
#include "qgsrenderer.h"
#include "qgssymbol.h"
#include "qgsvectorlayer.h"
#include "qgsvectordataprovider.h"
#include <iostream>
#include <QAction>
#include <QCoreApplication>
#include <QIcon>
#include <QMenu>
#include <QMessageBox>
#include <QPainter>
#include <QSettings>
QgsLegendLayer::QgsLegendLayer( QTreeWidgetItem* parent, QString name )
: QgsLegendItem( parent, name )
{
mType = LEGEND_LAYER;
setFlags( Qt::ItemIsEditable | Qt::ItemIsUserCheckable | Qt::ItemIsEnabled | Qt::ItemIsSelectable );
setCheckState( 0, Qt::Checked );
setText( 0, name );
setupFont();
}
QgsLegendLayer::QgsLegendLayer( QTreeWidget* parent, QString name ): QgsLegendItem( parent, name )
{
mType = LEGEND_LAYER;
setFlags( Qt::ItemIsEditable | Qt::ItemIsUserCheckable | Qt::ItemIsEnabled | Qt::ItemIsSelectable );
setCheckState( 0, Qt::Checked );
setText( 0, name );
setupFont();
}
QgsLegendLayer::QgsLegendLayer( QString name ): QgsLegendItem()
{
mType = LEGEND_LAYER;
setFlags( Qt::ItemIsEditable | Qt::ItemIsUserCheckable | Qt::ItemIsEnabled | Qt::ItemIsSelectable );
setCheckState( 0, Qt::Checked );
setText( 0, name );
setupFont();
}
QgsLegendLayer::~QgsLegendLayer()
{
mType = LEGEND_LAYER;
}
void QgsLegendLayer::setupFont() //private method
{
QFont myFont = font( 0 );
myFont.setBold( true ); //visually differentiate layer labels from the rest
setFont( 0, myFont );
}
bool QgsLegendLayer::isLeafNode()
{
return false;
}
QgsLegendItem::DRAG_ACTION QgsLegendLayer::accept( LEGEND_ITEM_TYPE type )
{
if ( type == LEGEND_LAYER || type == LEGEND_GROUP )
{
return REORDER;
}
else
{
return NO_ACTION;
}
}
QgsLegendItem::DRAG_ACTION QgsLegendLayer::accept( const QgsLegendItem* li ) const
{
if ( li && li != this )
{
LEGEND_ITEM_TYPE type = li->type();
if ( type == LEGEND_LAYER )
{
//if(parent() == li->parent())
//{
return REORDER;
//}
}
else if ( type == LEGEND_GROUP )
{
//only parent legend layers can change positions with groups
if ( parent() == 0 )
{
return REORDER;
}
}
}
return NO_ACTION;
}
QgsLegendLayerFile* QgsLegendLayer::firstLayerFile() const
{
//first find the legend layer file group
QgsLegendLayerFileGroup* llfg = 0;
for ( int i = 0; i < childCount(); ++i )
{
llfg = dynamic_cast<QgsLegendLayerFileGroup*>( child( i ) );
if ( llfg )
{
break;
}
}
if ( !llfg )
{
return 0;
}
QTreeWidgetItem* llf = llfg->child( 0 );
if ( !llf )
{
return 0;
}
QgsLegendLayerFile* legendlayerfile = dynamic_cast<QgsLegendLayerFile*>( llf );
return legendlayerfile;
}
QgsMapLayer* QgsLegendLayer::firstMapLayer() const
{
QgsLegendLayerFile* llf = firstLayerFile();
if ( llf )
{
return llf->layer();
}
else
{
return 0;
}
}
std::list<QgsMapLayer*> QgsLegendLayer::mapLayers()
{
std::list<QgsMapLayer*> list;
std::list<QgsLegendLayerFile*> llist = legendLayerFiles();
for ( std::list<QgsLegendLayerFile*>::iterator it = llist.begin(); it != llist.end(); ++it )
{
list.push_back(( *it )->layer() );
}
return list;
}
std::list<QgsLegendLayerFile*> QgsLegendLayer::legendLayerFiles()
{
std::list<QgsLegendLayerFile*> list;
//find the layer file group
QgsLegendLayerFileGroup* theLayerGroup = 0;
for ( int i = 0; i < childCount(); ++i )
{
theLayerGroup = dynamic_cast<QgsLegendLayerFileGroup*>( child( i ) );
if ( theLayerGroup )
{
break;
}
}
//add all the legend layer files in the group
if ( theLayerGroup )
{
QgsLegendLayerFile* theFile = 0;
for ( int i = 0; i < theLayerGroup->childCount(); ++i )
{
theFile = dynamic_cast<QgsLegendLayerFile*>( theLayerGroup->child( i ) );
if ( theFile )
{
list.push_back( theFile );
}
}
}
return list;
}
void QgsLegendLayer::updateLayerSymbologySettings( const QgsMapLayer* mapLayer )
{
if ( mapLayer )
{
//find all layers
std::list<QgsMapLayer*> theMapLayers = mapLayers();
for ( std::list<QgsMapLayer*>::iterator it = theMapLayers.begin(); it != theMapLayers.end(); ++it )
{
if (( *it ) != mapLayer )
{
( *it )->copySymbologySettings( *mapLayer );
}
}
// source might have changed - e.g. other subset
setToolTip( 0, mapLayer->publicSource() );
}
}
void QgsLegendLayer::updateCheckState()
{
std::list<QgsLegendLayerFile*> llfiles = legendLayerFiles();
if ( llfiles.size() < 1 )
{
return;
}
std::list<QgsLegendLayerFile*>::iterator iter = llfiles.begin();
Qt::CheckState theState = ( *iter )->checkState( 0 );
for ( ; iter != llfiles.end(); ++iter )
{
if ( theState != ( *iter )->checkState( 0 ) )
{
theState = Qt::PartiallyChecked;
break;
}
}
if ( theState != checkState( 0 ) )
{
treeWidget()->blockSignals( true );
setCheckState( 0, theState );
//notify the legend that the check state has changed
legend()->updateCheckStates( this, theState );
treeWidget()->blockSignals( false );
}
}
void QgsLegendLayer::refreshSymbology( const QString& key, double widthScale )
{
QgsMapLayer* theMapLayer = QgsMapLayerRegistry::instance()->mapLayer( key );
if ( !theMapLayer )
{
return;
}
if ( theMapLayer->type() == QgsMapLayer::VectorLayer ) // VECTOR
{
QgsVectorLayer* vlayer = dynamic_cast<QgsVectorLayer*>( theMapLayer );
vectorLayerSymbology( vlayer, widthScale ); // get and change symbology
}
else // RASTER
{
QgsRasterLayer* rlayer = dynamic_cast<QgsRasterLayer*>( theMapLayer );
rasterLayerSymbology( rlayer ); // get and change symbology
}
}
void QgsLegendLayer::changeSymbologySettings( const QgsMapLayer* theMapLayer,
const SymbologyList& newSymbologyItems )
{
if ( !theMapLayer )
{
return;
}
QgsLegendSymbologyItem* theSymbologyItem = 0;
//remove the symbology items under the legend layer
for ( int i = childCount(); i >= 0; --i )
{
theSymbologyItem = dynamic_cast<QgsLegendSymbologyItem*>( child( i ) );
if ( theSymbologyItem )
{
delete takeChild( i );
}
}
//add the new symbology items
int childposition = 0; //position to insert the items
for ( SymbologyList::const_iterator it = newSymbologyItems.begin(); it != newSymbologyItems.end(); ++it )
{
QgsLegendSymbologyItem* theItem = new QgsLegendSymbologyItem( it->second.width(), it->second.height() );
theItem->setText( 0, it->first );
theItem->setIcon( 0, QIcon( it->second ) );
insertChild( childposition, theItem );
++childposition;
}
//copy the legend settings for the other layer files in the same legend layer
updateLayerSymbologySettings( theMapLayer );
}
void QgsLegendLayer::vectorLayerSymbology( const QgsVectorLayer* layer, double widthScale )
{
SymbologyList itemList;
//add the new items
QString lw, uv, label;
const QgsRenderer* renderer = layer->renderer();
const QList<QgsSymbol*> sym = renderer->symbols();
for ( QList<QgsSymbol*>::const_iterator it = sym.begin(); it != sym.end(); ++it )
{
QImage img;
if (( *it )->type() == QGis::Point )
{
img = ( *it )->getPointSymbolAsImage( widthScale );
}
else if (( *it )->type() == QGis::Line )
{
img = ( *it )->getLineSymbolAsImage();
}
else //polygon
{
img = ( *it )->getPolygonSymbolAsImage();
}
QString values;
lw = ( *it )->lowerValue();
if ( !lw.isEmpty() )
{
values += lw;
}
uv = ( *it )->upperValue();
if ( !uv.isEmpty() )
{
values += " - ";
values += uv;
}
label = ( *it )->label();
if ( !label.isEmpty() )
{
values += " ";
values += label;
}
QPixmap pix = QPixmap::fromImage( img ); // convert to pixmap
itemList.push_back( std::make_pair( values, pix ) );
}
//create an item for each classification field (only one for most renderers)
QSettings settings;
if ( settings.value( "/qgis/showLegendClassifiers", false ).toBool() )
{
if ( renderer->needsAttributes() )
{
QgsAttributeList classfieldlist = renderer->classificationAttributes();
const QgsFieldMap& fields = layer->pendingFields();
for ( QgsAttributeList::iterator it = classfieldlist.begin(); it != classfieldlist.end(); ++it )
{
QString classfieldname = layer->attributeAlias( *it );
if ( classfieldname.isEmpty() )
{
classfieldname = fields[*it].name();
}
itemList.push_front( std::make_pair( classfieldname, QPixmap() ) );
}
}
}
changeSymbologySettings( layer, itemList );
}
void QgsLegendLayer::rasterLayerSymbology( QgsRasterLayer* layer )
{
SymbologyList itemList;
QPixmap legendpixmap = layer->legendAsPixmap( true ).scaled( 20, 20, Qt::KeepAspectRatio );
itemList.push_back( std::make_pair( "", legendpixmap ) );
changeSymbologySettings( layer, itemList );
}
void QgsLegendLayer::updateIcon()
{
QPixmap newIcon( getOriginalPixmap() );
QgsMapLayer* theLayer = firstMapLayer();
QgsLegendLayerFile* theFile = firstLayerFile();
if ( mapLayers().size() == 1 )
{
//overview
// FIXME: overview icon is missing
/*
if ( theFile->isInOverview() )
{
// Overlay the overview icon on the default icon
QPixmap myPixmap = QgisApp::getThemePixmap( "/mIconOverview.png" );
QPainter p( &newIcon );
p.drawPixmap( 0, 0, myPixmap );
p.end();
}*/
//editable
if ( theLayer->isEditable() )
{
QPixmap myPixmap = QgisApp::getThemePixmap( "/mIconEditable.png" );
// use editable icon instead of the layer's type icon
newIcon = myPixmap;
// Overlay the editable icon on the default icon
/*QPainter p( &newIcon );
p.drawPixmap( 0, 0, myPixmap );
p.end();*/
}
}
QIcon theIcon( newIcon );
setIcon( 0, theIcon );
}
QPixmap QgsLegendLayer::getOriginalPixmap() const
{
QgsMapLayer* firstLayer = firstMapLayer();
if ( firstLayer )
{
if ( firstLayer->type() == QgsMapLayer::VectorLayer )
{
QgsVectorLayer* vlayer = dynamic_cast<QgsVectorLayer*>( firstLayer );
switch ( vlayer->geometryType() )
{
case QGis::Point:
return QgisApp::getThemePixmap( "/mIconPointLayer.png" );
break;
case QGis::Line:
return QgisApp::getThemePixmap( "/mIconLineLayer.png" );
break;
case QGis::Polygon:
return QgisApp::getThemePixmap( "/mIconPolygonLayer.png" );
break;
default:
return QgisApp::getThemePixmap( "/mIconLayer.png" );
}
}
else if ( firstLayer->type() == QgsMapLayer::RasterLayer )
{
QgsRasterLayer* rlayer = dynamic_cast<QgsRasterLayer*>( firstLayer );
QPixmap myPixmap( 32, 32 );
rlayer->thumbnailAsPixmap( &myPixmap );
return myPixmap;
}
}
// undefined - should never reach this
return QgisApp::getThemePixmap( "/mIconLayer.png" );
}
void QgsLegendLayer::addToPopupMenu( QMenu& theMenu, QAction* toggleEditingAction )
{
std::list<QgsLegendLayerFile*> files = legendLayerFiles();
QgsMapLayer* firstLayer = NULL;
if ( files.size() > 0 )
{
firstLayer = files.front()->layer();
}
// zoom to layer extent
theMenu.addAction( QgisApp::getThemeIcon( "/mActionZoomToLayer.png" ),
tr( "&Zoom to layer extent" ), legend(), SLOT( legendLayerZoom() ) );
if ( firstLayer && firstLayer->type() == QgsMapLayer::RasterLayer )
{
theMenu.addAction( tr( "&Zoom to best scale (100%)" ), legend(), SLOT( legendLayerZoomNative() ) );
}
// show in overview
QAction* showInOverviewAction = theMenu.addAction( tr( "&Show in overview" ), this, SLOT( showInOverview() ) );
showInOverviewAction->setCheckable( true ); // doesn't support tristate
showInOverviewAction->setChecked( isInOverview() );
// remove from canvas
theMenu.addAction( QgisApp::getThemeIcon( "/mActionRemove.png" ),
tr( "&Remove" ), legend(), SLOT( legendLayerRemove() ) );
theMenu.addSeparator();
if ( firstLayer && firstLayer->type() == QgsMapLayer::VectorLayer )
{
// attribute table
QAction* tableAction = theMenu.addAction( tr( "&Open attribute table" ), this, SLOT( table() ) );
if ( files.size() != 1 )
{
tableAction->setEnabled( false );
}
// allow editing
if ( toggleEditingAction )
{
theMenu.addAction( toggleEditingAction );
}
QgsVectorLayer* theVectorLayer = dynamic_cast<QgsVectorLayer*>( firstLayer );
if ( files.size() != 1 )
{
toggleEditingAction->setEnabled( false );
}
if ( theVectorLayer )
{
toggleEditingAction->setChecked( theVectorLayer->isEditable() );
}
// save as shapefile
QAction* saveShpAction = theMenu.addAction( tr( "Save as shapefile..." ), this, SLOT( saveAsShapefile() ) );
if ( files.size() != 1 )
{
saveShpAction->setEnabled( false );
}
// save selection as shapefile
QAction* saveSelectionAction = theMenu.addAction( tr( "Save selection as shapefile..." ), this, SLOT( saveSelectionAsShapefile() ) );
if ( files.size() != 1 || theVectorLayer->selectedFeatureCount() == 0 )
{
saveSelectionAction->setEnabled( false );
}
theMenu.addSeparator();
}
QAction* propertiesAction = theMenu.addAction( tr( "&Properties" ), legend(), SLOT( legendLayerShowProperties() ) );
if ( files.size() != 1 )
{
propertiesAction->setEnabled( false );
}
}
bool QgsLegendLayer::isInOverview()
{
// QAction doesn't support tristate checkboxes
// returns true if just some are in overview
bool hasVisible = false;
// find out whether we're showing or hiding them
std::list<QgsLegendLayerFile*> maplayers = legendLayerFiles();
for ( std::list<QgsLegendLayerFile*>::iterator it = maplayers.begin(); it != maplayers.end(); ++it )
{
if ( *it && ( *it )->isInOverview() )
{
hasVisible = true;
break;
}
}
return hasVisible;
}
void QgsLegendLayer::showInOverview()
{
std::list<QgsLegendLayerFile*> maplayers = legendLayerFiles();
bool showLayers = ( ! isInOverview() );
// set overview visibility
for ( std::list<QgsLegendLayerFile*>::iterator it = maplayers.begin(); it != maplayers.end(); ++it )
{
if ( *it )
( *it )->setInOverview( showLayers );
}
legend()->updateMapCanvasLayerSet();
legend()->updateOverview();
}
void QgsLegendLayer::table()
{
std::list<QgsLegendLayerFile*> maplayers = legendLayerFiles();
if ( maplayers.size() > 1 )
{
QMessageBox::information( 0, tr( "Multiple layers" ),
tr( "This item contains multiple layers. Displaying multiple layers in the table is not supported." ) );
}
else if ( maplayers.size() == 1 )
{
maplayers.front()->table();
}
}
void QgsLegendLayer::saveAsShapefile()
{
std::list<QgsLegendLayerFile*> maplayers = legendLayerFiles();
if ( maplayers.size() == 1 )
{
maplayers.front()->saveAsShapefile();
}
}
void QgsLegendLayer::saveSelectionAsShapefile()
{
std::list<QgsLegendLayerFile*> maplayers = legendLayerFiles();
if ( maplayers.size() == 1 )
{
maplayers.front()->saveSelectionAsShapefile();
}
}