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qgslegend.cpp
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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. *
* *
***************************************************************************/
/* $Id$ */
#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 "qgslegendlayerfile.h"
#include "qgslegendlayerfilegroup.h"
#include "qgsmapcanvas.h"
#include "qgsmapcanvasmap.h"
#include "qgsmaplayer.h"
#include "qgsmaplayerregistry.h"
#include "qgsmaprenderer.h"
#include "qgsproject.h"
#include "qgsrasterlayer.h"
#include "qgsrasterlayerproperties.h"
#include "qgsvectorlayerproperties.h"
#include "qgsattributetabledisplay.h"
#include <cfloat>
#include <iostream>
#include <QFont>
#include <QDomDocument>
#include <QHeaderView>
#include <QMenu>
#include <QMessageBox>
#include <QMouseEvent>
#include <QPixmap>
#include <QTreeWidgetItem>
static const char *const ident_ = "$Id$";
const int AUTOSCROLL_MARGIN = 16;
/**
@note
set mItemBeingMoved pointer to 0 to prevent SuSE 9.0 crash
*/
QgsLegend::QgsLegend( QWidget * parent, const char *name )
: QTreeWidget( parent ), mMousePressedFlag( false ), mItemBeingMoved( 0 ), mShowLegendLayerFiles( false ), mToggleEditingAction( 0 ), mMapCanvas( 0 ), mMinimumIconSize( 20, 20 )
{
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 & ) ) );
setSortingEnabled( false );
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()
{}
void QgsLegend::handleCurrentItemChanged( QTreeWidgetItem* current, QTreeWidgetItem* previous )
{
QgsMapLayer *layer = currentLayer();
if ( mMapCanvas )
{
mMapCanvas->setCurrentLayer( layer );
}
emit currentLayerChanged( layer );
}
void QgsLegend::addGroup()
{
QgsLegendGroup* group = new QgsLegendGroup( this, tr( "group" ) );
mStateOfCheckBoxes.insert( std::make_pair( group, Qt::Checked ) ); //insert the check state into the map to query for changes later
setExpanded( indexFromItem( group ), true );
}
void QgsLegend::removeAll()
{
mStateOfCheckBoxes.clear();
clear();
mPixmapWidthValues.clear();
mPixmapHeightValues.clear();
updateMapCanvasLayerSet();
setIconSize( mMinimumIconSize );
}
void QgsLegend::selectAll( bool select )
{
if ( !mMapCanvas || mMapCanvas->isDrawing() )
{
return;
}
QTreeWidgetItem* theItem = firstItem();
while ( theItem )
{
QgsLegendItem* litem = dynamic_cast<QgsLegendItem*>( theItem );
if ( litem && litem->type() == QgsLegendItem::LEGEND_LAYER_FILE )
{
theItem->setCheckState( 0, ( select ? Qt::Checked : Qt::Unchecked ) );
handleItemChange( theItem, 0 );
}
theItem = nextItem( theItem );
}
}
void QgsLegend::removeLayer( QString layer_key )
{
if ( !mMapCanvas || mMapCanvas->isDrawing() )
{
return;
}
QTreeWidgetItem* theItem = firstItem();
QgsDebugMsg( "called." );
while ( theItem )
{
QgsLegendItem *li = dynamic_cast<QgsLegendItem*>( theItem );
if ( li )
{
QgsLegendLayerFile* llf = dynamic_cast<QgsLegendLayerFile*>( li );
if ( llf )
{
if ( llf->layer() && llf->layer()->getLayerID() == layer_key )
{
//remove the map entry for the checkbox
mStateOfCheckBoxes.erase( llf );
removeItem( llf );
delete llf;
break;
}
}
}
theItem = nextItem( theItem );
}
updateMapCanvasLayerSet();
adjustIconSize();
}
void QgsLegend::mousePressEvent( QMouseEvent * e )
{
if ( e->button() == Qt::LeftButton )
{
mLastPressPos = e->pos();
mMousePressedFlag = true;
}
else if ( e->button() == Qt::RightButton )
{
QTreeWidgetItem* item = itemAt( e->pos() );
setCurrentItem( item );
handleRightClickEvent( item, e->globalPos() );
}
QTreeWidget::mousePressEvent( e );
} // contentsMousePressEvent
void QgsLegend::mouseMoveEvent( QMouseEvent * e )
{
if ( mMousePressedFlag )
{
//set the flag back such that the else if(mItemBeingMoved)
//code part is passed during the next mouse moves
mMousePressedFlag = false;
// remember item we've pressed as the one being moved
// and where it was originally
QTreeWidgetItem* item = itemAt( mLastPressPos );
if ( item )
{
mItemBeingMoved = item;
mItemBeingMovedOrigPos = getItemPos( mItemBeingMoved );
//store information to insert the item back to the original position
storeInitialPosition( mItemBeingMoved );
setCursor( Qt::SizeVerCursor );
}
}
else if ( mItemBeingMoved )
{
QPoint p( e->pos() );
mLastPressPos = p;
// change the cursor appropriate to if drop is allowed
QTreeWidgetItem* item = itemAt( p );
QgsLegendItem* origin = dynamic_cast<QgsLegendItem*>( mItemBeingMoved );
QgsLegendItem* dest = dynamic_cast<QgsLegendItem*>( item );
if ( item && ( item != mItemBeingMoved ) )
{
QgsLegendItem::DRAG_ACTION action = dest->accept( origin );
if ( action == QgsLegendItem::REORDER )
{
QgsDebugMsg( "mouseMoveEvent::REORDER" );
if ( !yCoordAboveCenter( dest, e->y() ) ) //over bottom of item
{
if ( origin->nextSibling() != dest )
{
if ( origin->parent() != dest->parent() )
{
moveItem( origin, dest );
moveItem( dest, origin );
}
else
{
moveItem( dest, origin );
}
}
}
else //over top of item
{
if ( mItemBeingMoved != dest->nextSibling() )
{
//origin->moveItem(dest);
moveItem( origin, dest );
}
}
setCurrentItem( origin );
}
else if ( action == QgsLegendItem::INSERT )
{
QgsDebugMsg( "mouseMoveEvent::INSERT" );
setCursor( QCursor( Qt::PointingHandCursor ) );
if ( origin->parent() != dest )
{
insertItem( origin, dest );
setCurrentItem( origin );
}
}
else//no action
{
QgsDebugMsg( "mouseMoveEvent::NO_ACTION" );
if ( origin->type() == QgsLegendItem::LEGEND_LAYER_FILE && mItemBeingMovedOrigPos != getItemPos( mItemBeingMoved ) )
{
resetToInitialPosition( mItemBeingMoved );
}
setCursor( QCursor( Qt::ForbiddenCursor ) );
}
}
}
}
void QgsLegend::mouseReleaseEvent( QMouseEvent * e )
{
QTreeWidget::mouseReleaseEvent( e );
setCursor( QCursor( Qt::ArrowCursor ) );
mMousePressedFlag = false;
if ( !mItemBeingMoved )
{
return;
}
QTreeWidgetItem *destItem = itemAt( e->pos() );
QgsLegendItem* origin = dynamic_cast<QgsLegendItem*>( mItemBeingMoved );
QgsLegendItem* dest = dynamic_cast<QgsLegendItem*>( destItem );
// no change?
if ( !dest || !origin )
{
checkLayerOrderUpdate();
return;
}
QgsLegendItem::LEGEND_ITEM_TYPE originType = origin->type();
QgsLegendItem::LEGEND_ITEM_TYPE destType = dest->type();
if ( originType == QgsLegendItem::LEGEND_LAYER_FILE && destType == QgsLegendItem::LEGEND_LAYER_FILE_GROUP )
{
QgsDebugMsg( "Legend layer file moved to layer file group" );
// Not used... delete?
//QgsMapLayer* origLayer = ((QgsLegendLayerFile*)(origin))->layer();
if ( dest->childCount() > 1 )
{
//find the first layer in the legend layer group != origLayer and copy its settings
QgsLegendItem* currentItem = dynamic_cast<QgsLegendItem*>( dest->child( 0 ) );
while ( currentItem )
{
if ( currentItem != origin )
{
QgsMapLayer* origLayer = (( QgsLegendLayerFile* )( origin ) )->layer();
QgsMapLayer* currentLayer = (( QgsLegendLayerFile* )( currentItem ) )->layer();
origLayer->copySymbologySettings( *currentLayer );
break;
}
currentItem = currentItem->nextSibling();
}
}
}
else if ( originType == QgsLegendItem::LEGEND_LAYER_FILE && destType == QgsLegendItem::LEGEND_LAYER_FILE )
{
QgsDebugMsg( "Legend layer file moved to legend layer file" );
// Not used. Delete?
// QgsMapLayer* origLayer = ((QgsLegendLayerFile*)(origin))->layer();
// QgsMapLayer* destLayer = ((QgsLegendLayerFile*)(dest))->layer();
if ( dest == origin )//origin item has been moved in mouseMoveEvent such that it is under the mouse cursor now
{
if ( origin->parent()->childCount() > 1 )
{
//find the first layer in the legend layer group != origLayer and copy its settings
QTreeWidgetItem* currentItem = dest->parent()->child( 0 );
while ( currentItem )
{
if ( currentItem != origin )
{
QgsMapLayer* origLayer = (( QgsLegendLayerFile* )( origin ) )->layer();
QgsMapLayer* currentLayer = (( QgsLegendLayerFile* )( currentItem ) )->layer();
origLayer->copySymbologySettings( *currentLayer );
break;
}
currentItem = dynamic_cast<QgsLegendItem*>( currentItem )->nextSibling();
}
}
}
else
{
QgsMapLayer* origLayer = (( QgsLegendLayerFile* )( origin ) )->layer();
QgsMapLayer* destLayer = (( QgsLegendLayerFile* )( dest ) )->layer();
origLayer->copySymbologySettings( *destLayer );
}
}
else
{
QgsDebugMsg( "Other type of drag'n'drop happened!" );
}
checkLayerOrderUpdate();
mItemBeingMoved = NULL;
}
void QgsLegend::mouseDoubleClickEvent( QMouseEvent* e )
{
if ( !mMapCanvas || mMapCanvas->isDrawing() )
{
return;
}
legendLayerShowProperties();
}
void QgsLegend::handleRightClickEvent( QTreeWidgetItem* item, const QPoint& position )
{
if ( !mMapCanvas || mMapCanvas->isDrawing() )
{
return;
}
QMenu theMenu;
QgsLegendItem* li = dynamic_cast<QgsLegendItem*>( item );
if ( li )
{
if ( li->type() == QgsLegendItem::LEGEND_LAYER_FILE )
{
( static_cast<QgsLegendLayerFile*>( li ) )->addToPopupMenu( theMenu, mToggleEditingAction );
}
else if ( li->type() == QgsLegendItem::LEGEND_LAYER )
{
( static_cast<QgsLegendLayer*>( li ) )->addToPopupMenu( theMenu, mToggleEditingAction );
if ( li->parent() )
{
theMenu.addAction( tr( "&Make to toplevel item" ), this, SLOT( makeToTopLevelItem() ) );
}
}
else if ( li->type() == QgsLegendItem::LEGEND_GROUP )
{
theMenu.addAction( QgisApp::getThemeIcon( "/mActionRemove.png" ),
tr( "&Remove" ), this, SLOT( legendGroupRemove() ) );
}
if ( li->type() == QgsLegendItem::LEGEND_LAYER || li->type() == QgsLegendItem::LEGEND_GROUP )
{
theMenu.addAction( tr( "Re&name" ), this, SLOT( openEditor() ) );
}
}
theMenu.addAction( QgisApp::getThemeIcon( "/folder_new.png" ), tr( "&Add group" ), this, SLOT( addGroup() ) );
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* showFileGroupsAction = theMenu.addAction( tr( "Show file groups" ), this, SLOT( showLegendLayerFileGroups() ) );
showFileGroupsAction->setCheckable( true );
showFileGroupsAction->blockSignals( true );
showFileGroupsAction->setChecked( mShowLegendLayerFiles );
showFileGroupsAction->blockSignals( false );
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" );
}
int QgsLegend::getItemPos( QTreeWidgetItem* item )
{
int counter = 1;
QTreeWidgetItem* theItem = firstItem();
while ( theItem )
{
if ( theItem == item )
{
return counter;
}
theItem = nextItem( theItem );
++counter;
}
return -1;
}
void QgsLegend::addLayer( QgsMapLayer * layer )
{
if ( !mMapCanvas || mMapCanvas->isDrawing() )
{
return;
}
QgsLegendLayer * llayer = new QgsLegendLayer( layer->name() );//generate entry for mStateOfCheckBoxes below
QgsLegendLayerFileGroup * llfgroup = new QgsLegendLayerFileGroup( llayer, QString( "Files" ) );
QgsLegendLayerFile * llfile = new QgsLegendLayerFile( llfgroup, QgsLegendLayerFile::nameFromLayer( layer ), layer );
llayer->setLayerTypeIcon();
llayer->setToolTip( 0, layer->publicSource() );
//set the correct check states
blockSignals( true );
if ( llfile->isVisible() )
{
llfile->setCheckState( 0, Qt::Checked );
llayer->setCheckState( 0, Qt::Checked );
mStateOfCheckBoxes.insert( std::make_pair( llfile, Qt::Checked ) ); //insert the check state into the map to query for changes later
mStateOfCheckBoxes.insert( std::make_pair( llayer, Qt::Checked ) );
}
else
{
llfile->setCheckState( 0, Qt::Unchecked );
llayer->setCheckState( 0, Qt::Unchecked );
mStateOfCheckBoxes.insert( std::make_pair( llfile, Qt::Unchecked ) ); //insert the check state into the map to query for changes later
mStateOfCheckBoxes.insert( std::make_pair( llayer, Qt::Unchecked ) );
}
blockSignals( false );
insertTopLevelItem( 0, llayer );
setItemExpanded( llayer, true );
setItemExpanded( llfgroup, false );
//only if qsetting for 'legend layer file visible' is not set
if ( !mShowLegendLayerFiles )
{
llfgroup->setHidden( true );
}
llfile->updateLegendItem();
refreshLayerSymbology( layer->getLayerID() );
updateMapCanvasLayerSet();
// first layer?
if ( mMapCanvas->layerCount() == 1 )
mMapCanvas->zoomToFullExtent();
setCurrentItem( llayer );
//make the QTreeWidget item up-to-date
doItemsLayout();
}
QgsLegendLayerFile* QgsLegend::currentLayerFile()
{
QgsLegendItem* citem = dynamic_cast<QgsLegendItem*>( currentItem() );
if ( citem )
{
QgsLegendLayerFile* llf = dynamic_cast<QgsLegendLayerFile*>( citem );
if ( llf )
{
return llf; //the current item is itself a legend layer file
}
QgsLegendLayer* ll = dynamic_cast<QgsLegendLayer*>( citem );
if ( ll )
{
return ll->firstLayerFile(); //the current item is a legend layer, so return its first layer
}
QgsLegendLayer* lpl = dynamic_cast<QgsLegendLayer*>( citem->parent() );
if ( lpl )
{
return lpl->firstLayerFile(); //the parent of the current item is a legend layer, return its first layer
}
}
return 0;
}
QgsMapLayer* QgsLegend::currentLayer()
{
QgsLegendLayerFile* llf = currentLayerFile();
if ( llf )
{
return llf->layer();
}
else
{
return 0;
}
}
void QgsLegend::legendGroupRemove()
{
if ( !mMapCanvas || mMapCanvas->isDrawing() )
{
return;
}
QgsLegendGroup* lg = dynamic_cast<QgsLegendGroup*>( currentItem() );
if ( lg )
{
//delete the legend layers first
QTreeWidgetItem * child = lg->child( 0 );
while ( child )
{
setCurrentItem( child );
legendLayerRemove();
child = lg->child( 0 );
}
delete lg;
adjustIconSize();
}
}
void QgsLegend::legendLayerRemove()
{
if ( !mMapCanvas || mMapCanvas->isDrawing() )
{
return;
}
//if the current item is a legend layer: remove all layers of the current legendLayer
QgsLegendLayer* ll = dynamic_cast<QgsLegendLayer*>( currentItem() );
if ( ll )
{
std::list<QgsMapLayer*> maplayers = ll->mapLayers();
mStateOfCheckBoxes.erase( ll );
//also remove the entries for the QgsLegendLayerFiles from the map
std::list<QgsLegendLayerFile*> llfiles = ll->legendLayerFiles();
for ( std::list<QgsLegendLayerFile*>::iterator it = llfiles.begin(); it != llfiles.end(); ++it )
{
mStateOfCheckBoxes.erase( *it );
}
for ( std::list<QgsMapLayer*>::iterator it = maplayers.begin(); it != maplayers.end(); ++it )
{
//remove the layer
if ( *it )
{
//the map layer registry emits a signal an this will remove the legend layer
//from the legend and from memory by calling QgsLegend::removeLayer(QString layer key)
QgsMapLayerRegistry::instance()->removeMapLayer(( *it )->getLayerID() );
}
}
removeItem( ll );
delete ll;
adjustIconSize();
return;
}
//if the current item is a legend layer file
QgsLegendLayerFile* llf = dynamic_cast<QgsLegendLayerFile*>( currentItem() );
if ( llf )
{
if ( llf->layer() )
{
//the map layer registry emits a signal an this will remove the legend layer
//from the legend and from memory by calling QgsLegend::removeLayer(QString layer key)
QgsMapLayerRegistry::instance()->removeMapLayer( llf->layer()->getLayerID() );
}
}
return;
}
void QgsLegend::legendLayerShowProperties()
{
if ( !mMapCanvas || mMapCanvas->isDrawing() )
{
return;
}
QgsLegendItem* li = dynamic_cast<QgsLegendItem*>( currentItem() );
QgsLegendLayerFile* llf = 0;
if ( !li )
{
return;
}
if ( li->type() == QgsLegendItem::LEGEND_LAYER_FILE )
{
llf = dynamic_cast<QgsLegendLayerFile*>( li );
}
else if ( li->type() == QgsLegendItem::LEGEND_LAYER )
{
QgsLegendLayer* ll = dynamic_cast<QgsLegendLayer*>( li );
llf = ll->firstLayerFile();
}
if ( !llf )
{
return;
}
//QgsDebugMsg("Showing layer properties dialog");
QgsMapLayer* ml = llf->layer();
/*
TODO: Consider reusing the property dialogs again.
Sometimes around mid 2005, the property dialogs were saved for later reuse;
this resulted in a time savings when reopening the dialog. The code below
cannot be used as is, however, simply by saving the dialog pointer here.
Either the map layer needs to be passed as an argument to sync or else
a separate copy of the dialog pointer needs to be stored with each layer.
*/
if ( ml->type() == QgsMapLayer::RASTER )
{
QgsRasterLayerProperties *rlp = NULL; // See note above about reusing this
if ( rlp )
{
rlp->sync();
}
else
{
rlp = new QgsRasterLayerProperties( ml );
connect( rlp, SIGNAL( refreshLegend( QString, bool ) ), this, SLOT( refreshLayerSymbology( QString, bool ) ) );
}
rlp->exec();
delete rlp; // delete since dialog cannot be reused without updating code
}
else // VECTOR
{
QgsVectorLayer* vlayer = dynamic_cast<QgsVectorLayer*>( ml );
QgsVectorLayerProperties *vlp = NULL; // See note above about reusing this
if ( vlp )
{
vlp->reset();
}
else
{
vlp = new QgsVectorLayerProperties( vlayer );
connect( vlp, SIGNAL( refreshLegend( QString, bool ) ), this, SLOT( refreshLayerSymbology( QString, bool ) ) );
}
vlp->exec();
delete vlp; // delete since dialog cannot be reused without updating code
}
llf->updateLegendItem();
}
void QgsLegend::legendLayerShowInOverview()
{
if ( !mMapCanvas || mMapCanvas->isDrawing() )
{
return;
}
QgsLegendItem* li = dynamic_cast<QgsLegendItem*>( currentItem() );
if ( !li )
return;
if ( li->type() == QgsLegendItem::LEGEND_LAYER_FILE )
{
QgsLegendLayerFile* llf = dynamic_cast<QgsLegendLayerFile*>( li );
if ( !llf ) return;
llf->showInOverview();
}
else if ( li->type() == QgsLegendItem::LEGEND_LAYER )
{
QgsLegendLayer* ll = dynamic_cast<QgsLegendLayer*>( li );
if ( !ll ) return;
ll->showInOverview();
}
}
void QgsLegend::expandAll()
{
QTreeWidgetItem* theItem = firstItem();
while ( theItem )
{
setExpanded( indexFromItem( theItem ), true );
theItem = nextItem( theItem );
}
}
void QgsLegend::collapseAll()
{
QTreeWidgetItem* theItem = firstItem();
while ( theItem )
{
setExpanded( indexFromItem( theItem ), false );
theItem = nextItem( theItem );
}
}
bool QgsLegend::writeXML( QDomNode & legendnode, QDomDocument & document )
{
QDomNode tmplegendnode = legendnode; /*copy of the legendnode*/
QDomElement legendgroupnode;
QDomElement legendlayernode;
QDomElement layerfilegroupnode;
QDomElement legendsymbolnode;
QDomElement legendpropertynode;
QDomElement legendlayerfilenode;
QgsLegendLayerFile* llf;
Qt::CheckState cstate; //check state for legend layers and legend groups
QTreeWidgetItem* currentItem = firstItem();
while ( currentItem )
{
QgsLegendItem *item = dynamic_cast<QgsLegendItem*>( currentItem );
if ( item )
{
switch ( item->type() )
{
case QgsLegendItem::LEGEND_GROUP:
//make sure the legendnode is 'legend' again after a legend group
if ( !( item->parent() ) )
{
legendnode = tmplegendnode;
}
legendgroupnode = document.createElement( "legendgroup" );
if ( isItemExpanded( item ) )
{
legendgroupnode.setAttribute( "open", "true" );
}
else
{
legendgroupnode.setAttribute( "open", "false" );
}
legendgroupnode.setAttribute( "name", item->text( 0 ) );
cstate = item->checkState( 0 );
if ( cstate == Qt::Checked )
{
legendgroupnode.setAttribute( "checked", "Qt::Checked" );
}
else if ( cstate == Qt::Unchecked )
{
legendgroupnode.setAttribute( "checked", "Qt::Unchecked" );
}
else if ( cstate == Qt::PartiallyChecked )
{
legendgroupnode.setAttribute( "checked", "Qt::PartiallyChecked" );
}
legendnode.appendChild( legendgroupnode );
tmplegendnode = legendnode;
legendnode = legendgroupnode;
break;
case QgsLegendItem::LEGEND_LAYER:
//make sure the legendnode is 'legend' again after a legend group
if ( !( item->parent() ) )
{
legendnode = tmplegendnode;
}
legendlayernode = document.createElement( "legendlayer" );
if ( isItemExpanded( item ) )
{
legendlayernode.setAttribute( "open", "true" );
}
else
{
legendlayernode.setAttribute( "open", "false" );
}
cstate = item->checkState( 0 );
if ( cstate == Qt::Checked )
{
legendlayernode.setAttribute( "checked", "Qt::Checked" );
}
else if ( cstate == Qt::Unchecked )
{
legendlayernode.setAttribute( "checked", "Qt::Unchecked" );
}
else if ( cstate == Qt::PartiallyChecked )
{
legendlayernode.setAttribute( "checked", "Qt::PartiallyChecked" );
}
legendlayernode.setAttribute( "name", item->text( 0 ) );
legendnode.appendChild( legendlayernode );
break;
case QgsLegendItem::LEGEND_PROPERTY_GROUP:
legendpropertynode = document.createElement( "propertygroup" );
if ( isItemExpanded( item ) )
{
legendpropertynode.setAttribute( "open", "true" );
}
else
{
legendpropertynode.setAttribute( "open", "false" );
}
legendlayernode.appendChild( legendpropertynode );
break;
case QgsLegendItem::LEGEND_SYMBOL_GROUP:
legendsymbolnode = document.createElement( "symbolgroup" );
if ( isItemExpanded( item ) )
{
legendsymbolnode.setAttribute( "open", "true" );
}
else
{
legendsymbolnode.setAttribute( "open", "false" );
}
legendlayernode.appendChild( legendsymbolnode );
break;
case QgsLegendItem::LEGEND_LAYER_FILE_GROUP:
layerfilegroupnode = document.createElement( "filegroup" );
if ( isItemExpanded( item ) )
{
layerfilegroupnode.setAttribute( "open", "true" );
}
else
{
layerfilegroupnode.setAttribute( "open", "false" );
}
if ( isItemHidden( item ) )
{
layerfilegroupnode.setAttribute( "hidden", "true" );
}
else
{
layerfilegroupnode.setAttribute( "hidden", "false" );
}
legendlayernode.appendChild( layerfilegroupnode );
break;
case QgsLegendItem::LEGEND_LAYER_FILE:
legendlayerfilenode = document.createElement( "legendlayerfile" );
llf = dynamic_cast<QgsLegendLayerFile*>( item );
if ( llf )
{
QgsMapLayer* layer = llf->layer();
// layer id
legendlayerfilenode.setAttribute( "layerid", layer->getLayerID() );
layerfilegroupnode.appendChild( legendlayerfilenode );
// visible flag
legendlayerfilenode.setAttribute( "visible", llf->isVisible() );
// show in overview flag
legendlayerfilenode.setAttribute( "isInOverview", llf->isInOverview() );
}
break;
default: //do nothing for the leaf nodes
break;
}
}
currentItem = nextItem( currentItem );
}
return true;
}
bool QgsLegend::readXML( QDomNode& legendnode )
{
QDomElement childelem;
QDomNode child;
QgsLegendGroup* lastGroup = 0; //pointer to the last inserted group
QgsLegendLayer* lastLayer = 0; //pointer to the last inserted legendlayer
QgsLegendLayerFileGroup* lastLayerFileGroup = 0; //pointer to the last inserted layerfilegroup
child = legendnode.firstChild();
// For some unexplained reason, collapsing/expanding the legendLayer items
// immediately after they have been created doesn't work (they all end up
// expanded). The legendGroups and legendLayerFiles seems ok through. The
// workaround is to store the required states of the legendLayers and set
// them at the end of this function.
QList<QTreeWidgetItem*> collapsed, expanded;
if ( !child.isNull() )
{
clear(); //remove all items first
mStateOfCheckBoxes.clear();
do
{
QDomElement childelem = child.toElement();
QString name = childelem.attribute( "name" );
//test every possibility of element...
if ( childelem.tagName() == "legendgroup" )
{
QgsLegendGroup* theGroup = new QgsLegendGroup( this, name );
childelem.attribute( "open" ) == "true" ? expanded.push_back( theGroup ) : collapsed.push_back( theGroup );
//set the checkbox of the legend group to the right state
blockSignals( true );
QString checked = childelem.attribute( "checked" );
if ( checked == "Qt::Checked" )
{
theGroup->setCheckState( 0, Qt::Checked );
mStateOfCheckBoxes.insert( std::make_pair( theGroup, Qt::Checked ) );
}
else if ( checked == "Qt::Unchecked" )
{
theGroup->setCheckState( 0, Qt::Unchecked );
mStateOfCheckBoxes.insert( std::make_pair( theGroup, Qt::Unchecked ) );
}
else if ( checked == "Qt::PartiallyChecked" )
{
theGroup->setCheckState( 0, Qt::PartiallyChecked );
mStateOfCheckBoxes.insert( std::make_pair( theGroup, Qt::PartiallyChecked ) );
}
blockSignals( false );
lastGroup = theGroup;
}
else if ( childelem.tagName() == "legendlayer" )
{
//add the legendlayer to the legend (but no legendlayerfile yet, follows later)
//if childelem is in a legendgroup element, add the layer to the group
QgsLegendLayer* theLayer;
if ( child.parentNode().toElement().tagName() == "legendgroup" )
{
theLayer = new QgsLegendLayer( lastGroup, name );
}
else
{
theLayer = new QgsLegendLayer( this, name );
lastGroup = 0;
}
childelem.attribute( "open" ) == "true" ? expanded.push_back( theLayer ) : collapsed.push_back( theLayer );
//set the checkbox of the legend layer to the right state
blockSignals( true );
QString checked = childelem.attribute( "checked", "Qt::Checked" ); // Default is to show
if ( checked == "Qt::Checked" )
{
theLayer->setCheckState( 0, Qt::Checked );