/
qgslegend.cpp
2523 lines (2148 loc) · 65 KB
/
qgslegend.cpp
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/***************************************************************************
qgslegend.cpp - description
-------------------
begin : Sun Jul 28 2002
copyright : (C) 2002 by Gary E.Sherman
email : sherman at mrcc dot com
Romans 3:23=>Romans 6:23=>Romans 10:9,10=>Romans 12
***************************************************************************/
/***************************************************************************
* *
* 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 "qgsapplication.h"
#include "qgisapp.h"
#include "qgslogger.h"
#include "qgslegend.h"
#include "qgslegendgroup.h"
#include "qgslegendlayer.h"
#include "qgslegendpropertygroup.h"
#include "qgslegendsymbologyitem.h"
#include "qgsmapcanvas.h"
#include "qgsmapcanvasmap.h"
#include "qgsmaplayer.h"
#include "qgsmaplayerregistry.h"
#include "qgsmaprenderer.h"
#include "qgsproject.h"
#include "qgsrasterlayer.h"
#include "qgsvectorlayer.h"
#include "qgsgenericprojectionselector.h"
#include <QFont>
#include <QDomDocument>
#include <QHeaderView>
#include <QMenu>
#include <QMessageBox>
#include <QMouseEvent>
#include <QPixmap>
#include <QTreeWidgetItem>
const int AUTOSCROLL_MARGIN = 16;
// This function finds a unique group name [prefix1, prefix2, ...] by adding an
// incremental integer to prefix. It is necessary because group names are the
// only way of identifying groups in QgsLegendInterface.
// Could add a "parent" argument and use that instead, or pass it as prefix
static QString getUniqueGroupName( QString prefix, QStringList groups )
{
QString suffix;
if ( groups.size() == 0 )
{
suffix = "1";
}
else
{
// get a list of strings that match prefix, and keep the suffix
QStringList match = groups.filter( QRegExp( QString( "^" + prefix ) ) );
match.replaceInStrings( prefix, QString( "" ) );
// find the maximum
int max = 0;
foreach( QString m, match )
{
if ( m.toInt() > max )
max = m.toInt();
}
suffix = QString( "%1" ).arg( max + 1 );
}
return prefix + suffix;
}
QgsLegend::QgsLegend( QgsMapCanvas *canvas, QWidget * parent, const char *name )
: QTreeWidget( parent )
, mMousePressedFlag( false )
, mMapCanvas( canvas )
, mMinimumIconSize( 20, 20 )
, mChanging( false )
{
setObjectName( name );
connect( this, SIGNAL( itemChanged( QTreeWidgetItem*, int ) ),
this, SLOT( handleItemChange( QTreeWidgetItem*, int ) ) );
connect( this, SIGNAL( currentItemChanged( QTreeWidgetItem*, QTreeWidgetItem* ) ),
this, SLOT( handleCurrentItemChanged( QTreeWidgetItem*, QTreeWidgetItem* ) ) );
// project handling
connect( QgsProject::instance(), SIGNAL( readProject( const QDomDocument & ) ),
this, SLOT( readProject( const QDomDocument & ) ) );
connect( QgsProject::instance(), SIGNAL( writeProject( QDomDocument & ) ),
this, SLOT( writeProject( QDomDocument & ) ) );
// connect map layer registry signal to legend
connect( QgsMapLayerRegistry::instance(), SIGNAL( layerWillBeRemoved( QString ) ),
this, SLOT( removeLayer( QString ) ) );
connect( QgsMapLayerRegistry::instance(), SIGNAL( removedAll() ),
this, SLOT( removeAll() ) );
connect( QgsMapLayerRegistry::instance(), SIGNAL( layerWasAdded( QgsMapLayer* ) ),
this, SLOT( addLayer( QgsMapLayer * ) ) );
connect( mMapCanvas, SIGNAL( layersChanged() ),
this, SLOT( refreshCheckStates() ) );
// Initialise the line indicator widget.
mInsertionLine = new QWidget( viewport() );
hideLine();
mInsertionLine->setAutoFillBackground( true );
QPalette pal = mInsertionLine->palette();
pal.setColor( mInsertionLine->backgroundRole(), Qt::blue );
mInsertionLine->setPalette( pal );
setSortingEnabled( false );
setSelectionMode( QAbstractItemView::ExtendedSelection );
setDragEnabled( false );
setAutoScroll( true );
QFont f( "Arial", 10, QFont::Normal );
setFont( f );
QPalette palette;
palette.setColor( backgroundRole(), QColor( 192, 192, 192 ) );
setPalette( palette );
setColumnCount( 1 );
header()->setHidden( 1 );
setRootIsDecorated( true );
initPixmaps();
}
QgsLegend::~QgsLegend()
{
delete mInsertionLine;
}
#ifdef QGISDEBUG
void QgsLegend::showItem( QString msg, QTreeWidgetItem *item )
{
if ( !item )
{
QgsDebugMsg( msg + ": no item?" );
return;
}
QgsLegendItem *litem = dynamic_cast<QgsLegendItem *>( item );
QgsLegendGroup *group = dynamic_cast<QgsLegendGroup *>( item );
QgsLegendLayer *layer = dynamic_cast<QgsLegendLayer *>( item );
QString type;
if ( group )
type = "group";
else if ( layer )
type = "layer";
else if ( litem )
type = "litem";
else
type = "item";
QgsDebugMsgLevel( QString( "%1: %2 %3 row:%4" ).arg( msg ).arg( type ).arg( item->text( 0 ) ).arg( indexFromItem( item ).row() ), 3 );
}
#else
#define showItem(msg, item)
#endif
void QgsLegend::handleCurrentItemChanged( QTreeWidgetItem* current, QTreeWidgetItem* previous )
{
Q_UNUSED( current );
Q_UNUSED( previous );
QgsMapLayer *layer = currentLayer();
if ( mMapCanvas )
{
mMapCanvas->setCurrentLayer( layer );
}
emit currentLayerChanged( layer );
}
int QgsLegend::addGroupToCurrentItem( QString name, bool expand )
{
QTreeWidgetItem *parent = currentItem();
return addGroup( name, expand, parent );
}
int QgsLegend::addGroup( QString name, bool expand, QTreeWidgetItem* parent )
{
//avoid multiple refreshes of map canvas because of itemChanged signal
blockSignals( true );
bool nameEmpty = name.isEmpty();
QgsLegendGroup *parentGroup = dynamic_cast<QgsLegendGroup *>( parent );
QgsLegendGroup *group;
if ( parentGroup )
{
if ( nameEmpty )
name = getUniqueGroupName( tr( "sub-group" ), groups() );
group = new QgsLegendGroup( parentGroup, name );
}
else
{
if ( nameEmpty )
name = getUniqueGroupName( tr( "group" ), groups() );
group = new QgsLegendGroup( this, name );
if ( currentItem() )
{
moveItem( group, currentItem() );
}
}
QModelIndex groupIndex = indexFromItem( group );
setExpanded( groupIndex, expand );
setCurrentItem( group );
if ( nameEmpty )
openEditor();
blockSignals( false );
emit itemAdded( groupIndex );
return groupIndex.row();
}
int QgsLegend::addGroup( QString name, bool expand, int groupIndex )
{
QgsLegendGroup * lg = dynamic_cast<QgsLegendGroup *>( topLevelItem( groupIndex ) );
return addGroup( name, expand, lg );
}
void QgsLegend::removeAll()
{
QgsDebugMsg( "Entering." );
clear();
mEmbeddedGroups.clear();
mPixmapWidthValues.clear();
mPixmapHeightValues.clear();
updateMapCanvasLayerSet();
setIconSize( mMinimumIconSize );
mDropTarget = 0;
}
void QgsLegend::selectAll( bool visible )
{
if ( !mMapCanvas || mMapCanvas->isDrawing() )
{
return;
}
// Turn off rendering to improve speed.
mMapCanvas->freeze();
for ( QTreeWidgetItem* theItem = firstItem(); theItem; theItem = nextItem( theItem ) )
{
QgsLegendItem* litem = dynamic_cast<QgsLegendItem *>( theItem );
if ( litem && litem->type() == QgsLegendItem::LEGEND_LAYER )
{
theItem->setCheckState( 0, visible ? Qt::Checked : Qt::Unchecked );
handleItemChange( theItem, 0 );
}
}
// Turn on rendering (if it was on previously)
mMapCanvas->freeze( false );
QgsProject::instance()->dirty( true );
}
void QgsLegend::removeGroup( int groupIndex )
{
QgsLegendGroup * lg = dynamic_cast<QgsLegendGroup *>( topLevelItem( groupIndex ) );
if ( lg )
{
removeGroup( lg );
}
}
void QgsLegend::removeLayer( QString layerId )
{
QgsDebugMsg( "Entering." );
bool invLayerRemoved = false;
for ( QTreeWidgetItem* theItem = firstItem(); theItem; theItem = nextItem( theItem ) )
{
QgsLegendItem *li = dynamic_cast<QgsLegendItem *>( theItem );
if ( li )
{
// save legend layer (parent of a legend layer file we're going to delete)
QgsLegendLayer* ll = qobject_cast<QgsLegendLayer *>( li );
if ( ll && ll->layer() && ll->layer()->id() == layerId )
{
if ( !ll->isVisible() )
{
invLayerRemoved = true;
}
removeItem( ll );
delete ll;
break;
}
}
}
updateMapCanvasLayerSet();
adjustIconSize();
emit itemRemoved();
if ( invLayerRemoved )
emit invisibleLayerRemoved();
}
void QgsLegend::mousePressEvent( QMouseEvent * e )
{
if ( e->button() == Qt::LeftButton )
{
mMousePressedFlag = true;
mDropTarget = itemAt( e->pos() );
}
else if ( e->button() == Qt::RightButton )
{
QTreeWidgetItem* item = itemAt( e->pos() );
if ( !item || item == currentItem() )
{
if ( !item )
setCurrentItem( 0 );
handleRightClickEvent( item, e->globalPos() );
}
}
QTreeWidget::mousePressEvent( e );
} // contentsMousePressEvent
void QgsLegend::mouseMoveEvent( QMouseEvent * e )
{
if ( !mMousePressedFlag )
{
QgsDebugMsg( "mouse not pressed" );
return;
}
if ( mItemsBeingMoved.isEmpty() && !selectedItems().isEmpty() )
{
if ( mDropTarget == itemAt( e->pos() ) )
return;
mLayersPriorToMove = layerIDs();
QgsDebugMsg( "layers prior to move: " + mLayersPriorToMove.join( ", " ) );
// record which items were selected and hide them
foreach( QTreeWidgetItem * item, selectedItems() )
{
//prevent to drag out content under groups that are embedded from other
//project files.
if ( parentGroupEmbedded( item ) )
{
continue;
}
item->setHidden( true );
mItemsBeingMoved << item;
}
// remove and unhide items, whose parent is already to be moved
foreach( QTreeWidgetItem * item, mItemsBeingMoved )
{
QTreeWidgetItem *parent = item->parent();
bool parentHidden = false;
while ( !parentHidden && parent )
{
parentHidden = parent->isHidden();
parent = parent->parent();
}
if ( parentHidden )
{
mItemsBeingMoved.removeOne( item );
item->setHidden( false );
}
}
setCursor( Qt::SizeVerCursor );
}
if ( mItemsBeingMoved.isEmpty() )
{
QgsDebugMsg( "nothing to move" );
setCursor( QCursor( Qt::ArrowCursor ) );
return;
}
// change the cursor appropriate to if drop is allowed
QTreeWidgetItem* item = itemAt( e->pos() );
hideLine();
updateLineWidget();
scrollToItem( item );
mDropTarget = 0;
if ( item )
{
showItem( "moveMoveEvent" , item );
QgsLegendItem *litem = dynamic_cast<QgsLegendItem *>( item );
QgsLegendGroup *group = dynamic_cast<QgsLegendGroup *>( item );
QgsLegendLayer *layer = dynamic_cast<QgsLegendLayer *>( item );
while ( item->parent() && !group && !layer )
{
item = item->parent();
litem = dynamic_cast<QgsLegendItem *>( item );
group = dynamic_cast<QgsLegendGroup *>( item );
layer = dynamic_cast<QgsLegendLayer *>( item );
}
showItem( "layer/group" , item );
int line_x = visualItemRect( item ).left();
int line_y;
if ( layer )
{
QTreeWidgetItem *lastItem = item->childCount() > 0 && item->isExpanded() ? item->child( item->childCount() - 1 ) : item;
int y0 = visualItemRect( item ).top() + 1;
int y1 = visualItemRect( lastItem ).bottom() - 2;
mDropTarget = layer;
//prevent inserting content into embedded groups
if ( !parentGroupEmbedded( litem ) )
{
if ( e->y() < ( y0 + y1 ) / 2 )
{
QgsDebugMsg( "insert before layer" );
mDropAction = BEFORE;
line_y = y0;
}
else
{
QgsDebugMsg( "insert after layer" );
mDropAction = AFTER;
line_y = y1;
}
}
}
else if ( group )
{
if ( yCoordAboveCenter( litem, e->y() ) ) //over center of item
{
QgsDebugMsg( "insert before group" );
//prevent inserting content into embedded groups
if ( !parentGroupEmbedded( item ) )
{
line_y = visualItemRect( item ).top() + 1;
mDropTarget = item;
mDropAction = BEFORE;
}
}
else // below center of item
{
if ( !groupEmbedded( item ) )
{
QgsDebugMsg( "insert into group" );
line_y = visualItemRect( item ).bottom() - 2;
mDropTarget = item;
mDropAction = INSERT;
}
}
}
else
{
line_y = visualItemRect( item ).bottom() - 2;
}
showLine( line_y, line_x );
setCursor( QCursor( Qt::SizeVerCursor ) );
}
else if ( !item
&& e->pos().y() >= 0 && e->pos().y() < viewport()->height()
&& e->pos().x() >= 0 && e->pos().x() < viewport()->width() )
{
// Outside the listed items, but check if we are in the empty area
// of the viewport, so we can drop after the last top level item.
mDropTarget = topLevelItem( topLevelItemCount() - 1 );
mDropAction = AFTER;
QgsDebugMsg( "insert after last layer/group" );
showLine( visualItemRect( lastVisibleItem() ).bottom() + 1, 0 );
setCursor( QCursor( Qt::SizeVerCursor ) );
}
else
{
QgsDebugMsg( "No item here" );
setCursor( QCursor( Qt::ForbiddenCursor ) );
}
}
void QgsLegend::updateGroupCheckStates( QTreeWidgetItem *item )
{
QgsLegendGroup *lg = dynamic_cast< QgsLegendGroup * >( item );
if ( !lg )
return;
for ( int i = 0; i < item->childCount(); i++ )
{
updateGroupCheckStates( item->child( i ) );
}
Qt::CheckState theState = lg->pendingCheckState();
if ( theState != lg->checkState( 0 ) )
{
blockSignals( true );
lg->setCheckState( 0, theState );
blockSignals( false );
}
}
void QgsLegend::mouseReleaseEvent( QMouseEvent * e )
{
QTreeWidget::mouseReleaseEvent( e );
mMousePressedFlag = false;
if ( mItemsBeingMoved.isEmpty() )
return;
setCursor( QCursor( Qt::ArrowCursor ) );
hideLine();
// unhide
foreach( QTreeWidgetItem * item, mItemsBeingMoved )
{
item->setHidden( false );
}
if ( mDropTarget )
{
if ( mDropAction == BEFORE )
{
showItem( "before => drop after", mDropTarget );
QTreeWidgetItem *prev = previousSibling( mDropTarget );
if ( prev )
{
mDropTarget = prev;
showItem( "prev sibling", mDropTarget );
foreach( QTreeWidgetItem * item, mItemsBeingMoved )
{
moveItem( item, mDropTarget );
mDropTarget = item;
}
}
else
{
mDropTarget = mDropTarget->parent();
if ( mDropTarget )
{
showItem( "parent", mDropTarget );
mDropAction = INSERT;
}
else
{
mDropTarget = invisibleRootItem();
mDropAction = AFTER;
showItem( "root", mDropTarget );
}
}
}
if ( mDropAction == AFTER )
{
showItem( "drop after", mDropTarget );
foreach( QTreeWidgetItem * item, mItemsBeingMoved )
{
moveItem( item, mDropTarget );
mDropTarget = item;
}
}
if ( mDropAction == INSERT )
{
showItem( "insert into", mDropTarget );
foreach( QTreeWidgetItem * item, mItemsBeingMoved )
{
insertItem( item, mDropTarget );
}
}
mItemsBeingMoved.clear();
for ( int i = 0; i < topLevelItemCount(); i++ )
{
updateGroupCheckStates( topLevelItem( i ) );
}
}
else //no action
{
QgsDebugMsg( "Drop NO_ACTION" );
}
checkLayerOrderUpdate();
}
void QgsLegend::mouseDoubleClickEvent( QMouseEvent *e )
{
Q_UNUSED( e );
QSettings settings;
switch ( settings.value( "/qgis/legendDoubleClickAction", 0 ).toInt() )
{
case 0:
QgisApp::instance()->layerProperties();
break;
case 1:
QgisApp::instance()->attributeTable();
break;
default:
break;
}
}
void QgsLegend::handleRightClickEvent( QTreeWidgetItem* item, const QPoint& position )
{
if ( !mMapCanvas || mMapCanvas->isDrawing() )
{
return;
}
QMenu theMenu( tr( "Legend context" ), this );
QgsLegendItem* li = dynamic_cast<QgsLegendItem *>( item );
if ( li )
{
if ( li->type() == QgsLegendItem::LEGEND_LAYER )
{
qobject_cast<QgsLegendLayer*>( li )->addToPopupMenu( theMenu );
if ( li->parent() && !parentGroupEmbedded( li ) )
{
theMenu.addAction( tr( "&Make to Toplevel Item" ), this, SLOT( makeToTopLevelItem() ) );
}
}
else if ( li->type() == QgsLegendItem::LEGEND_GROUP )
{
theMenu.addAction( QgisApp::getThemeIcon( "/mActionZoomToLayer.png" ),
tr( "Zoom to Group" ), this, SLOT( legendLayerZoom() ) );
// use QGisApp::removeLayer() to remove all selected layers+groups
theMenu.addAction( QgisApp::getThemeIcon( "/mActionRemoveLayer.png" ), tr( "&Remove" ), QgisApp::instance(), SLOT( removeLayer() ) );
theMenu.addAction( QgisApp::getThemeIcon( "/mActionSetCRS.png" ),
tr( "&Set Group CRS" ), this, SLOT( legendGroupSetCRS() ) );
}
if (( li->type() == QgsLegendItem::LEGEND_LAYER || li->type() == QgsLegendItem::LEGEND_GROUP ) && !groupEmbedded( li ) && !parentGroupEmbedded( li ) )
{
theMenu.addAction( tr( "Re&name" ), this, SLOT( openEditor() ) );
}
//
// Option to group layers, if the selection is more than one
//
if ( selectedLayers().length() > 1 )
{
theMenu.addAction( tr( "&Group Selected" ), this, SLOT( groupSelectedLayers() ) );
}
// ends here
}
theMenu.addAction( QgisApp::getThemeIcon( "/folder_new.png" ), tr( "&Add New Group" ), this, SLOT( addGroupToCurrentItem() ) );
theMenu.addAction( QgisApp::getThemeIcon( "/mActionExpandTree.png" ), tr( "&Expand All" ), this, SLOT( expandAll() ) );
theMenu.addAction( QgisApp::getThemeIcon( "/mActionCollapseTree.png" ), tr( "&Collapse All" ), this, SLOT( collapseAll() ) );
QAction *updateDrawingOrderAction = theMenu.addAction( QgisApp::getThemeIcon( "/mUpdateDrawingOrder.png" ), tr( "&Update Drawing Order" ), this, SLOT( toggleDrawingOrderUpdate() ) );
updateDrawingOrderAction->setCheckable( true );
updateDrawingOrderAction->setChecked( mUpdateDrawingOrder );
theMenu.exec( position );
}
void QgsLegend::initPixmaps()
{
mPixmaps.mOriginalPixmap = QgisApp::getThemePixmap( "/mActionFileSmall.png" );
mPixmaps.mInOverviewPixmap = QgisApp::getThemePixmap( "/mActionInOverview.png" );
mPixmaps.mEditablePixmap = QgisApp::getThemePixmap( "/mIconEditable.png" );
mPixmaps.mProjectionErrorPixmap = QgisApp::getThemePixmap( "/mIconProjectionProblem.png" );
}
Qt::CheckState QgsLegend::layerCheckState( QgsMapLayer * layer )
{
QgsLegendLayer * ll = findLegendLayer( layer );
return ll ? ll->checkState( 0 ) : Qt::Unchecked;
}
QgsLegendGroup* QgsLegend::addEmbeddedGroup( const QString& groupName, const QString& projectFilePath, QgsLegendItem* parent )
{
mEmbeddedGroups.insert( groupName, projectFilePath );
//open project file, get layer ids in group, add the layers
QFile projectFile( projectFilePath );
if ( !projectFile.open( QIODevice::ReadOnly ) )
{
return 0;
}
QDomDocument projectDocument;
if ( !projectDocument.setContent( &projectFile ) )
{
return 0;
}
//store identify disabled layers of the embedded project
QSet<QString> embeddedIdentifyDisabledLayers;
QDomElement disabledLayersElem = projectDocument.documentElement().firstChildElement( "properties" ).firstChildElement( "Identify" ).firstChildElement( "disabledLayers" );
if ( !disabledLayersElem.isNull() )
{
QDomNodeList valueList = disabledLayersElem.elementsByTagName( "value" );
for ( int i = 0; i < valueList.size(); ++i )
{
embeddedIdentifyDisabledLayers.insert( valueList.at( i ).toElement().text() );
}
}
QDomElement legendElem = projectDocument.documentElement().firstChildElement( "legend" );
if ( legendElem.isNull() )
{
return 0;
}
QList<QDomNode> brokenNodes;
QList< QPair< QgsVectorLayer*, QDomElement > > vectorLayerList;
QSettings settings;
QDomNodeList legendGroupList = legendElem.elementsByTagName( "legendgroup" );
for ( int i = 0; i < legendGroupList.size(); ++i )
{
QDomElement legendElem = legendGroupList.at( i ).toElement();
if ( legendElem.attribute( "name" ) == groupName )
{
//embedded groups cannot be embedded again
if ( legendElem.attribute( "embedded" ) == "1" )
{
mEmbeddedGroups.remove( groupName );
return 0;
}
QgsLegendGroup* group = 0;
if ( parent )
{
group = new QgsLegendGroup( parent, groupName );
}
else
{
group = new QgsLegendGroup( this, groupName );
}
QFont groupFont;
groupFont.setItalic( true );
group->setFont( 0, groupFont );
setCurrentItem( group );
QDomNodeList groupChildren = legendElem.childNodes();
for ( int j = 0; j < groupChildren.size(); ++j )
{
QDomElement childElem = groupChildren.at( j ).toElement();
bool visible = ( childElem.attribute( "checked" ).compare( "Qt::Checked", Qt::CaseInsensitive ) == 0 );
QString tagName = childElem.tagName();
if ( tagName == "legendlayer" )
{
QString layerId = childElem.firstChildElement( "filegroup" ).firstChildElement( "legendlayerfile" ).attribute( "layerid" );
QgsProject::instance()->createEmbeddedLayer( layerId, projectFilePath, brokenNodes, vectorLayerList, false );
QTreeWidgetItem* cItem = 0;
if ( settings.value( "/qgis/addNewLayersToCurrentGroup", false ).toBool() )
{
cItem = group->takeChild( 0 );
}
else
{
cItem = currentItem();
removeItem( cItem );
}
if ( cItem )
{
group->insertChild( group->childCount(), cItem );
}
if ( !visible )
{
cItem->setCheckState( 0, Qt::Unchecked );
}
//consider the layer might be identify disabled in its project
if ( embeddedIdentifyDisabledLayers.contains( layerId ) )
{
QStringList thisProjectIdentifyDisabledLayers = QgsProject::instance()->readListEntry( "Identify", "/disabledLayers" );
thisProjectIdentifyDisabledLayers.append( layerId );
QgsProject::instance()->writeEntry( "Identify", "/disabledLayers", thisProjectIdentifyDisabledLayers );
}
}
else if ( tagName == "legendgroup" )
{
addEmbeddedGroup( childElem.attribute( "name" ), projectFilePath, group );
}
}
checkLayerOrderUpdate();
return group;
}
}
return 0;
}
int QgsLegend::getItemPos( QTreeWidgetItem* item )
{
int counter = 1;
for ( QTreeWidgetItem* theItem = firstItem(); theItem; theItem = nextItem( theItem ) )
{
if ( theItem == item )
{
return counter;
}
++counter;
}
return -1;
}
void QgsLegend::addLayer( QgsMapLayer * layer )
{
QgsDebugMsg( "Entering." );
if ( !mMapCanvas || mMapCanvas->isDrawing() )
{
return;
}
QgsLegendLayer* llayer = new QgsLegendLayer( layer );
if ( !QgsProject::instance()->layerIsEmbedded( layer->id() ).isEmpty() )
{
QFont itemFont;
itemFont.setItalic( true );
llayer->setFont( 0, itemFont );
}
//set the correct check states
blockSignals( true );
llayer->setCheckState( 0, llayer->isVisible() ? Qt::Checked : Qt::Unchecked );
blockSignals( false );
QgsLegendGroup *lg = dynamic_cast<QgsLegendGroup *>( currentItem() );
if ( !lg && currentItem() )
{
lg = dynamic_cast<QgsLegendGroup *>( currentItem()->parent() );
}
int index;
if ( lg )
{
index = lg->indexOfChild( currentItem() );
}
else
{
index = indexOfTopLevelItem( currentItem() );
}
if ( index < 0 )
{
index = 0;
}
QSettings settings;
if ( lg && settings.value( "/qgis/addNewLayersToCurrentGroup", false ).toBool() )
{
lg->insertChild( index, llayer );
}
else
{
insertTopLevelItem( index, llayer );
setCurrentItem( llayer );
}
setItemExpanded( llayer, true );
//don't expand raster items by default, there could be too many
refreshLayerSymbology( layer->id(), layer->type() != QgsMapLayer::RasterLayer );
updateMapCanvasLayerSet();
// first layer?
if ( layers().count() == 1 )
{
if ( !mMapCanvas->mapRenderer()->hasCrsTransformEnabled() )
mMapCanvas->mapRenderer()->setDestinationCrs( layer->crs() );
mMapCanvas->zoomToFullExtent();
mMapCanvas->clearExtentHistory();
}
//make the QTreeWidget item up-to-date
doItemsLayout();
emit itemAdded( indexFromItem( llayer ) );
}
void QgsLegend::setLayerVisible( QgsMapLayer * layer, bool visible )
{
QgsLegendLayer * ll = findLegendLayer( layer );
if ( ll )
{
ll->setCheckState( 0, visible ? Qt::Checked : Qt::Unchecked );
}
}
QgsLegendLayer* QgsLegend::currentLegendLayer()
{
QgsLegendItem* citem = dynamic_cast<QgsLegendItem *>( currentItem() );
if ( citem )
{
QgsLegendLayer* ll = qobject_cast<QgsLegendLayer *>( citem );
if ( ll )
{
return ll; //the current item is a legend layer, so return it
}
QgsLegendLayer* lpl = dynamic_cast<QgsLegendLayer *>( citem->parent() );
if ( lpl )
{
return lpl; //the parent of the current item is a legend layer, return it
}
}
return 0;
}
QgsMapLayer* QgsLegend::currentLayer()
{
QgsLegendLayer* ll = currentLegendLayer();
if ( ll )
{
return ll->layer();
}
else
{
return 0;
}
}
QList<QgsMapLayer *> QgsLegend::selectedLayers()
{
QList<QgsMapLayer *> layers;
foreach( QTreeWidgetItem * item, selectedItems() )
{
QgsLegendLayer *ll = dynamic_cast<QgsLegendLayer *>( item );
if ( ll )
layers << ll->layer();
}
return layers;
}
QList<QgsLegendLayer *> QgsLegend::legendLayers()
{
if ( mUpdateDrawingOrder )
{
QList< QgsLegendLayer * > items;
QTreeWidgetItemIterator it( this );
while ( *it )
{
QgsLegendLayer *llayer = dynamic_cast<QgsLegendLayer *>( *it );
if ( llayer )
items.append( llayer );
++it;
}
return items;
}
else
{
int n = 0;
QMap< int, QgsLegendLayer * > items;
QTreeWidgetItemIterator it( this );
while ( *it )
{
QgsLegendLayer *llayer = dynamic_cast<QgsLegendLayer *>( *it );
if ( llayer )
{
QgsDebugMsgLevel( QString( "n=%1 o=%2 name=%3" ).arg( n ).arg( llayer->drawingOrder() ).arg( llayer->layer()->name() ), 3 );
items.insertMulti( llayer->drawingOrder(), llayer );
n++;
}