/
qgslegend.cpp
executable file
·1744 lines (1585 loc) · 49 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. *
* *
***************************************************************************/
/* $Id$ */
#include "qgisapp.h"
#include "qgsapplication.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 "qgsmaplayer.h"
#include "qgsmaplayerregistry.h"
#include "qgsproject.h"
#include "qgsrasterlayerproperties.h"
#include "qgsvectordataprovider.h"
#include <cfloat>
#include <QCoreApplication>
#include <QPixmap>
#include <QMouseEvent>
#include <iostream>
#include <QTreeWidgetItem>
#include <QMenu>
#include <QFont>
#include <QHeaderView>
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(QgisApp* app, QWidget * parent, const char *name)
: QTreeWidget(parent), mApp(app), mMousePressedFlag(false), mItemBeingMoved(0), mMapCanvas(0), mShowLegendLayerFiles(false), mMinimumIconSize(20, 20), mCurrentLayer(0)
{
connect( this, SIGNAL(itemChanged(QTreeWidgetItem*, int)),
this, SLOT(handleItemChange(QTreeWidgetItem*, int)));
connect( this, SIGNAL(currentItemChanged(QTreeWidgetItem*, QTreeWidgetItem*)),
this, SLOT(handleCurrentItemChanged(QTreeWidgetItem*, QTreeWidgetItem*)));
setSortingEnabled(false);
setDragEnabled(false);
setAutoScroll(true);
QFont f("Arial", 10, QFont::Normal);
setFont(f);
setBackgroundColor(QColor(192, 192, 192));
setColumnCount(1);
header()->setHidden(1);
setRootIsDecorated(true);
}
QgsLegend::~QgsLegend()
{}
void QgsLegend::handleCurrentItemChanged(QTreeWidgetItem* current, QTreeWidgetItem* previous)
{
QgsMapLayer *layer = currentLayer();
if(layer != mCurrentLayer)
{
if(mApp)
{
mApp->activateDeactivateLayerRelatedActions( layer );
}
if(mMapCanvas)
{
mMapCanvas->setCurrentLayer( layer );
}
mCurrentLayer = 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)
{
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)
{
QTreeWidgetItem* theItem = firstItem();
#ifdef QGISDEBUG
qWarning("in QgsLegend::removeLayer");
#endif
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)
{
#ifdef QGISDEBUG
qWarning("mouseMoveEvent::REORDER");
#endif
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)
{
#ifdef QGISDEBUG
qWarning("mouseMoveEvent::INSERT");
#endif
setCursor( QCursor(Qt::PointingHandCursor) );
if(origin->parent() != dest)
{
insertItem(origin, dest);
setCurrentItem(origin);
}
}
else//no action
{
#ifdef QGISDEBUG
qWarning("mouseMoveEvent::NO_ACTION");
#endif
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));
if (mItemBeingMoved)
{
QTreeWidgetItem *destItem = itemAt(e->pos());
QgsLegendItem* origin = dynamic_cast<QgsLegendItem*>(mItemBeingMoved);
QgsLegendItem* dest = dynamic_cast<QgsLegendItem*>(destItem);
if(!dest || !origin)
{
checkLayerOrderUpdate();
return;
}
if(dest && origin && getItemPos(dest) != mItemBeingMovedOrigPos)
{
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)
{
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();
}
mMapCanvas->refresh();
}
}
else if(originType == QgsLegendItem::LEGEND_LAYER_FILE && destType == QgsLegendItem::LEGEND_LAYER_FILE)
{
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();
}
mMapCanvas->refresh();
}
}
else
{
QgsMapLayer* origLayer = ((QgsLegendLayerFile*)(origin))->layer();
QgsMapLayer* destLayer = ((QgsLegendLayerFile*)(dest))->layer();
origLayer->copySymbologySettings(*destLayer);
origLayer->setLegend((QgsLegend*)(dynamic_cast<QgsLegendItem*>(dest->parent())->nextSibling()));
}
}
checkLayerOrderUpdate();
}
}
mMousePressedFlag = false;
mItemBeingMoved = NULL;
}
void QgsLegend::mouseDoubleClickEvent(QMouseEvent* e)
{
QgsLegendItem* li = dynamic_cast<QgsLegendItem*>(currentItem());
QgsMapLayer* ml = 0;
if(li)
{
if(li->type() == QgsLegendItem::LEGEND_LAYER_FILE)
{
QgsLegendLayerFile* llf = dynamic_cast<QgsLegendLayerFile*>(li);
ml = llf->layer();
}
else if(li->type() == QgsLegendItem::LEGEND_LAYER)
{
QgsLegendLayer* ll = dynamic_cast<QgsLegendLayer*>(li);
ml = ll->firstMapLayer();
}
if (ml && ml->type() == QgsMapLayer::RASTER)
{
QgsRasterLayerProperties *rlp = new QgsRasterLayerProperties(ml);
if (rlp->exec())
{
delete rlp;
QCoreApplication::processEvents();
}
}
else if(ml) //vector
{
ml->showLayerProperties();
}
}
}
void QgsLegend::handleRightClickEvent(QTreeWidgetItem* item, const QPoint& position)
{
QMenu theMenu;
QString iconsPath = QgsApplication::themePath();
if(mMapCanvas->isDrawing())
{
return;
}
QgsLegendItem* li = dynamic_cast<QgsLegendItem*>(item);
if(li)
{
if(li->type() == QgsLegendItem::LEGEND_LAYER_FILE)
{
(static_cast<QgsLegendLayerFile*>(li))->layer()->contextMenu()->exec(position);
return;
}
else if(li->type() == QgsLegendItem::LEGEND_LAYER)
{
theMenu.addAction(tr("&Properties"), this, SLOT(legendLayerShowProperties()));
theMenu.addAction(tr("&Zoom to layer extent"), this, SLOT(zoomToLayerExtent()));
theMenu.addAction(QIcon(QPixmap(iconsPath+QString("/mActionAddAllToOverview.png"))), tr("&Add to overview"), this, SLOT(legendLayerAddToOverview()));
theMenu.addAction(QIcon(QPixmap(iconsPath+QString("/mActionRemoveAllFromOverview.png"))), tr("&Remove from overview"), this, SLOT(legendLayerRemoveFromOverview()));
theMenu.addAction(QIcon(QPixmap(iconsPath+QString("/mActionRemove.png"))), tr("&Remove"), this, SLOT(legendLayerRemove()));
if(li->parent())
{
theMenu.addAction(tr("&Make to toplevel item"), this, SLOT(makeToTopLevelItem()));
}
//add entry 'allow editing'
QAction* toggleEditingAction = theMenu.addAction(tr("&Allow editing"), this, SLOT(legendLayerToggleEditing()));
toggleEditingAction->setCheckable(true);
QgsLegendLayer* theLayer = dynamic_cast<QgsLegendLayer*>(li);
if(theLayer)
{
QgsVectorLayer* theVectorLayer = dynamic_cast<QgsVectorLayer*>(theLayer->firstMapLayer());
if(!theVectorLayer || theLayer->mapLayers().size() !=1)
{
toggleEditingAction->setEnabled(false);
}
else
{
if(theVectorLayer->getDataProvider()->capabilities() & QgsVectorDataProvider::SaveAsShapefile)
{
theMenu.addAction(tr("&Save as shapefile..."), this, SLOT(legendLayerSaveAsShapefile()));
}
}
if(theVectorLayer)
{
toggleEditingAction->setChecked(theVectorLayer->isEditable());
}
}
}
else if(li->type() == QgsLegendItem::LEGEND_GROUP)
{
theMenu.addAction(QPixmap(iconsPath+QString("/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(QIcon(QPixmap(iconsPath+QString("/folder_new.png"))), tr("&Add group"), this, SLOT(addGroup()));
theMenu.addAction(QIcon(QPixmap(iconsPath+QString("/mActionExpandTree.png"))), tr("&Expand all"), this, SLOT(expandAll()));
theMenu.addAction(QIcon(QPixmap(iconsPath+QString("/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);
}
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 )
{
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(layer->visible())
{
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);
layer->setLegend(this);
layer->setLegendLayerFile(llfile);
layer->initContextMenu(mApp);
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);
}
updateMapCanvasLayerSet();
// first layer?
if (mMapCanvas->layerCount() == 1)
mMapCanvas->zoomFullExtent();
setCurrentItem(llayer);
//make the QTreeWidget item up-to-date
doItemsLayout();
layer->refreshLegend();
}
QgsMapLayer* QgsLegend::currentLayer()
{
QgsLegendItem* citem=dynamic_cast<QgsLegendItem*>(currentItem());
if(citem)
{
QgsLegendLayerFile* llf=dynamic_cast<QgsLegendLayerFile*>(citem);
if(llf)
{
return llf->layer(); //the current item is itself a legend layer file
}
else
{
QgsLegendLayer* ll = dynamic_cast<QgsLegendLayer*>(citem);
if(ll)
{
return ll->firstMapLayer(); //the current item is a legend layer, so return its first layer
}
else
{
QgsLegendLayer* lpl = dynamic_cast<QgsLegendLayer*>(citem->parent());
if(lpl)
{
return lpl->firstMapLayer(); //the parent of the current item is a legend layer, return its first layer
}
else
{
return 0;
}
}
}
}
else
{
return 0;
}
}
void QgsLegend::legendGroupRemove()
{
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 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)
{
QgsMapLayerRegistry::instance()->removeMapLayer((*it)->getLayerID());
}
}
if(maplayers.size()>0)
{
mMapCanvas->refresh();
}
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::legendLayerAddToOverview()
{
//add or remove all layers to/ from overview
QgsLegendLayer* ll = dynamic_cast<QgsLegendLayer*>(currentItem());
if(!ll)
{
return;
}
std::list<QgsMapLayer*> maplayers = ll->mapLayers();
for(std::list<QgsMapLayer*>::iterator it = maplayers.begin(); it!=maplayers.end(); ++it)
{
if(*it)
{
(*it)->inOverview(true);
}
}
mMapCanvas->updateOverview();
}
void QgsLegend::legendLayerRemoveFromOverview()
{
//add or remove all layers to/ from overview
QgsLegendLayer* ll = dynamic_cast<QgsLegendLayer*>(currentItem());
if(!ll)
{
return;
}
std::list<QgsMapLayer*> maplayers = ll->mapLayers();
for(std::list<QgsMapLayer*>::iterator it = maplayers.begin(); it!=maplayers.end(); ++it)
{
if(*it)
{
(*it)->inOverview(false); //else
}
}
mMapCanvas->updateOverview();
}
void QgsLegend::legendLayerShowProperties()
{
QgsLegendItem* citem=dynamic_cast<QgsLegendItem*>(currentItem());
if(!citem)
{
return;
}
QgsLegendLayer* ll = dynamic_cast<QgsLegendLayer*>(citem);
if(!ll)
{
return;
}
QgsMapLayer* ml = ll->firstMapLayer();
if(!ml)
{
return;
}
ml->showLayerProperties();
}
void QgsLegend::legendLayerToggleEditing()
{
QgsLegendLayer* ll = dynamic_cast<QgsLegendLayer*>(currentItem());
if(!ll)
{
return;
}
QgsVectorLayer* theVectorLayer = dynamic_cast<QgsVectorLayer*>(ll->firstMapLayer());
if(!theVectorLayer)
{
return;
}
if(theVectorLayer->isEditable())
{
theVectorLayer->stopEditing();
}
else
{
theVectorLayer->startEditing();
}
}
void QgsLegend::legendLayerSaveAsShapefile()
{
QgsLegendLayer* ll = dynamic_cast<QgsLegendLayer*>(currentItem());
if(!ll)
{
return;
}
QgsVectorLayer* theVectorLayer = dynamic_cast<QgsVectorLayer*>(ll->firstMapLayer());
if(!theVectorLayer)
{
return;
}
theVectorLayer->saveAsShapefile();
}
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 & layer_node, QDomDocument & document )
{
QDomElement legendnode = document.createElement("legend");
layer_node.appendChild(legendnode);
QDomElement 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)
{
legendlayerfilenode.setAttribute("layerid", llf->layer()->getLayerID());
layerfilegroupnode.appendChild(legendlayerfilenode);
}
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" ? expandItem(theGroup) : collapseItem(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");
if(checked == "Qt::Checked")
{
theLayer->setCheckState(0, Qt::Checked);
mStateOfCheckBoxes.insert(std::make_pair(theLayer, Qt::Checked));
}
else if(checked == "Qt::Unchecked")
{
theLayer->setCheckState(0, Qt::Unchecked);
mStateOfCheckBoxes.insert(std::make_pair(theLayer, Qt::Unchecked));
}
else if(checked == "Qt::PartiallyChecked")
{
theLayer->setCheckState(0, Qt::PartiallyChecked);