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TreeModel.cc
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Jan Möbius authored
git-svn-id: http://www.openflipper.org/svnrepo/OpenFlipper/branches/Free@7700 383ad7c9-94d9-4d36-a494-682f7c89f535
Jan Möbius authoredgit-svn-id: http://www.openflipper.org/svnrepo/OpenFlipper/branches/Free@7700 383ad7c9-94d9-4d36-a494-682f7c89f535
TreeModel.cc 22.92 KiB
/*===========================================================================*\
* *
* OpenFlipper *
* Copyright (C) 2001-2009 by Computer Graphics Group, RWTH Aachen *
* www.openflipper.org *
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*---------------------------------------------------------------------------*
* This file is part of OpenFlipper. *
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* OpenFlipper is free software: you can redistribute it and/or modify *
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* *
* If other files instantiate templates or use macros *
* or inline functions from this file, or you compile this file and *
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* not by itself cause the resulting executable to be covered by the *
* GNU Lesser General Public License. This exception does not however *
* invalidate any other reasons why the executable file might be *
* covered by the GNU Lesser General Public License. *
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\*===========================================================================*/
/*===========================================================================*\
* *
* $Revision$ *
* $Author$ *
* $Date$ *
* *
\*===========================================================================*/
#include <QtGui>
#include <QBrush>
#include "TreeModel.hh"
#include <iostream>
#include <OpenFlipper/common/Types.hh>
#include <OpenFlipper/BasePlugin/PluginFunctions.hh>
//******************************************************************************
/** \brief Constructor
*
* @param _parent parent Object
*/
TreeModel::TreeModel( QObject *_parent) : QAbstractItemModel(_parent)
{
rootItem_ = new TreeItem( -1, "ROOT", DATA_UNKNOWN, 0);
}
//******************************************************************************
/** \brief Destructor
* */
TreeModel::~TreeModel()
{
}
//******************************************************************************
/** \brief Return the number of columns
*
* @param unused
* @return return always 4
*/
int TreeModel::columnCount(const QModelIndex &/*_parent*/) const
{
// Name,Visible,Source,Target -> 4
return (4);
}
//******************************************************************************
/** \brief Returns the data stored under the given role for the item referred to by the index
*
* @param index a ModelIndex that defines the item in the tree
* @param role defines the kind of data requested
* @return requested data
*/
QVariant TreeModel::data(const QModelIndex &index, int role) const
{
// Skip invalid requests
if (!index.isValid())
return QVariant();
// Get the corresponding tree item
TreeItem *item = static_cast<TreeItem*>(index.internalPointer());
if ( item == rootItem_ ) {
std::cerr << "Root" << std::endl;
}
// Set the background color of the objects row
if ( role == Qt::BackgroundRole ) {
if ( !item->visible() ) {
return QVariant( QBrush(QColor(100,100,100) ) );
}
}
switch (index.column() ) {
// Name
case 0 :
// If we are setting the name, also add the icon
if ( role == Qt::DecorationRole ) {
return QVariant( typeIcon(item->dataType()) );
}
if (role != Qt::DisplayRole && role != Qt::EditRole )
return QVariant();
return QVariant(item->name());
break;
// Visible
case 1 :
if (role == Qt::CheckStateRole ) { bool visibility = false;
// visiblity group
if (item->isGroup()){
QList< TreeItem* > children = item->getLeafs();
bool initRound = true;
for (int i=0; i < children.size(); i++){
if (initRound){
visibility = children[i]->visible();
initRound = false;
}else if (visibility != children[i]->visible())
return QVariant(Qt::PartiallyChecked);
}
}else
//visibility item
visibility = item->visible();
if (visibility)
return QVariant(Qt::Checked);
else
return QVariant(Qt::Unchecked);
}
return QVariant();
break;
// Source
case 2 :
if (role == Qt::CheckStateRole ) {
bool source = false;
// source group
if (item->isGroup()){
QList< TreeItem* > children = item->getLeafs();
bool initRound = true;
for (int i=0; i < children.size(); i++){
if (initRound){
source = children[i]->source();
initRound = false;
}else if (source != children[i]->source())
return QVariant(Qt::PartiallyChecked);
}
}else
//source item
source = item->source();
if (source)
return QVariant(Qt::Checked);
else
return QVariant(Qt::Unchecked);
}
return QVariant();
// Target
case 3 :
if (role == Qt::CheckStateRole ) {
bool target = false;
// target group
if (item->isGroup()){
QList< TreeItem* > children = item->getLeafs();
bool initRound = true;
for (int i=0; i < children.size(); i++){
if (initRound){
target = children[i]->target();
initRound = false;
}else if (target != children[i]->target())
return QVariant(Qt::PartiallyChecked);
}
}else
//target item
target = item->target();
if (target)
return QVariant(Qt::Checked); else
return QVariant(Qt::Unchecked);
}
return QVariant();
break;
default:
return QVariant();
}
}
//******************************************************************************
/** \brief Returns the item flags for the given index
*
* @param index ModelIndex that defines an item in the tree
* @return flags for the given ModelIndex
*/
Qt::ItemFlags TreeModel::flags(const QModelIndex &index) const
{
if (!index.isValid())
return 0;
Qt::ItemFlags flags = 0;
// Show/Source/Target
if ( ( index.column() == 1 ) ||
( index.column() == 2 ) ||
( index.column() == 3 ) )
flags = Qt::ItemIsUserCheckable | Qt::ItemIsEnabled | Qt::ItemIsSelectable;
else
if ( index.column() == 0 )
flags = Qt::ItemIsEditable | Qt::ItemIsEnabled | Qt::ItemIsSelectable;
else
flags = Qt::ItemIsEnabled;
// Get the corresponding tree item
TreeItem *item = static_cast<TreeItem*>(index.internalPointer());
if ( item->isGroup() )
return flags | Qt::ItemIsDragEnabled | Qt::ItemIsDropEnabled;
else
return flags | Qt::ItemIsDragEnabled;
}
//******************************************************************************
/** \brief Returns the data in the header
*
* @param section the column in the header
* @param orientation header orientation (only horizontal handled)
* @param role the role that defines the type of data
* @return the requested data
*/
QVariant TreeModel::headerData(int section, Qt::Orientation orientation,
int role) const
{
if (orientation == Qt::Horizontal && role == Qt::DisplayRole) {
switch (section) {
case 0 : return QVariant("Name");
case 1 : return QVariant("Show");
case 2 : return QVariant("Source");
case 3 : return QVariant("Target");
default :
return QVariant(); }
}
return QVariant();
}
//******************************************************************************
/** \brief Returns the index of the item in the model specified by the given row, column and parent index.
*
* @param row the row
* @param column the column
* @param _parent parent item
* @return corresponding ModelIndex
*/
QModelIndex TreeModel::index(int row, int column, const QModelIndex &_parent) const
{
// if (!hasIndex(row, column, _parent))
// return QModelIndex();
TreeItem *parentItem;
if (!_parent.isValid())
parentItem = rootItem_;
else
parentItem = static_cast<TreeItem*>(_parent.internalPointer());
TreeItem *childItem = parentItem->child(row);
if (childItem)
return createIndex(row, column, childItem);
else
return QModelIndex();
}
//******************************************************************************
/** \brief Return index of parent item
*
* @param index a ModelIndex
* @return parent of the given ModelIndex
*/
QModelIndex TreeModel::parent(const QModelIndex &index) const
{
if (!index.isValid())
return QModelIndex();
TreeItem *childItem = static_cast<TreeItem*>(index.internalPointer());
TreeItem *parentItem = childItem->parent();
if (parentItem == rootItem_)
return QModelIndex();
return createIndex(parentItem->row(), 0, parentItem);
}
//******************************************************************************
/** \brief Returns the number of rows under given parent
*
* @param _parent parent Item
* @return number of rows that are children of given parent
*/
int TreeModel::rowCount(const QModelIndex &_parent) const
{
TreeItem *parentItem;
if (_parent.column() > 0)
return 0;
if (!_parent.isValid())
parentItem = rootItem_;
else
parentItem = static_cast<TreeItem*>(_parent.internalPointer());
return parentItem->childCount();
}
//******************************************************************************
/** \brief The object with the given id has been changed. Update the model.
*
* @param _id id of an object
*/
void TreeModel::objectChanged(int _id) {
if ( _id != -1 ){
BaseObject* obj = 0;
PluginFunctions::getObject(_id, obj);
TreeItem* item = rootItem_->childExists(_id);
//if internal and external representation are both valid
if (obj != 0 && item != 0){
//update the name
if ( obj->name() != item->name() ){
item->name( obj->name() );
QModelIndex index = getModelIndex(item,0);
if ( index.isValid() )
emit dataChanged( index, index);
}
//update visibility
if ( obj->visible() != item->visible() || obj->isGroup() ){
item->visible( obj->visible() );
QModelIndex index0 = getModelIndex(item,0);
QModelIndex index1 = getModelIndex(item,3);
if ( index0.isValid() && index1.isValid() ){
//the whole row has to be updated because of the grey background-color
emit dataChanged( index0, index1);
propagateUpwards(item->parent(), 1, obj->visible() );
}
if ( obj->isGroup() )
propagateDownwards(item, 1 );
}
//update source flag
if ( obj->source() != item->source() || obj->isGroup() ){
item->source( obj->source() );
QModelIndex index = getModelIndex(item,2);
if ( index.isValid() ){
emit dataChanged( index, index);
propagateUpwards(item->parent(), 2, false );
}
if ( obj->isGroup() )
propagateDownwards(item, 2 );
}
//update target flag if ( obj->target() != item->target() || obj->isGroup() ){
item->target( obj->target() );
QModelIndex index = getModelIndex(item,3);
if ( index.isValid() ){
emit dataChanged( index, index);
propagateUpwards(item->parent(), 3, false );
}
if ( obj->isGroup() )
propagateDownwards(item, 3 );
}
//update parent
if ( obj->parent() == PluginFunctions::objectRoot() && isRoot( item->parent() ) ){
return;
}else if ( obj->parent() == PluginFunctions::objectRoot() && !isRoot( item->parent() ) ){
moveItem(item, rootItem_ );
}else if ( obj->parent()->id() != item->parent()->id() ){
TreeItem* parent = rootItem_->childExists( obj->parent()->id() );
if (parent != 0)
moveItem(item, parent );
}
}
}
}
/** \brief The object with the given id has been added. add it to the internal tree
*
* @param id_ id of the object
*/
void TreeModel::objectAdded(BaseObject* _object){
// check if item already in model tree
// this function can be called by addEmpty and fileOpened
// both will be called by fileOpened such that the item
// already exists
if( rootItem_->childExists( _object->id() ))
return;
TreeItem* parent = 0;
//find the parent
if ( _object->parent() == PluginFunctions::objectRoot() )
parent = rootItem_;
else
parent = rootItem_->childExists( _object->parent()->id() );
if (parent != 0){
QModelIndex parentIndex = getModelIndex(parent, 0);
beginInsertRows(parentIndex, parent->childCount(), parent->childCount()); //insert at the bottom
TreeItem* item = new TreeItem( _object->id(), _object->name(), _object->dataType(), parent);
parent->appendChild( item );
endInsertRows();
}
objectChanged( _object->id() );
}
/** \brief The object with the given id has been deleted. delete it from the internal tree
*
* @param id_ id of the object
*/
void TreeModel::objectDeleted(int _id){
TreeItem* item = rootItem_->childExists(_id);
if ( item != 0 && !isRoot(item) ){
QModelIndex itemIndex = getModelIndex(item, 0);
QModelIndex parentIndex = itemIndex.parent();
beginRemoveRows( parentIndex, itemIndex.row(), itemIndex.row() );
item->parent()->removeChild(item);
item->deleteSubtree();
delete item;
endRemoveRows();
}
}
//******************************************************************************
/** \brief move the item to a new parent
*
* @param _item the item
* @param _parent new parent
*/
void TreeModel::moveItem(TreeItem* _item, TreeItem* _parent ){
QModelIndex itemIndex = getModelIndex(_item, 0);
QModelIndex oldParentIndex = itemIndex.parent();
QModelIndex newParentIndex = getModelIndex(_parent, 0);
//delete everything at the old location
beginRemoveRows( oldParentIndex, itemIndex.row(), itemIndex.row() );
_item->parent()->removeChild(_item);
endRemoveRows();
//insert it at the new location
beginInsertRows(newParentIndex, _parent->childCount(), _parent->childCount() ); //insert at the bottom
_item->setParent( _parent );
_parent->appendChild( _item );
endInsertRows();
emit layoutChanged();
}
//******************************************************************************
/** \brief Return item at given index
*
* @param index a ModelIndex
* @return item at given index
*/
TreeItem* TreeModel::getItem(const QModelIndex &index) const
{
if (index.isValid()) {
TreeItem *item = static_cast<TreeItem*>(index.internalPointer());
if (item) return item;
}
return rootItem_;
}
//******************************************************************************
/** \brief Return item-name at given index
*
* @param index a ModelIndex * @return name of the item at given index
*/
QString TreeModel::itemName(const QModelIndex &index) const
{
if (index.isValid()) {
TreeItem *item = static_cast<TreeItem*>(index.internalPointer());
if (item)
return item->name();
}
return "not found";
}
//******************************************************************************
/** \brief Return item-id at given index
*
* @param index a ModelIndex
* @return item-id at given index
*/
int TreeModel::itemId(const QModelIndex &index) const
{
if (index.isValid()) {
TreeItem *item = static_cast<TreeItem*>(index.internalPointer());
if (item)
return item->id();
}
return -1;
}
//******************************************************************************
/** \brief Return index of given item
*
* Warning: Only use this function if you know that all ModelIndices are created
*
* @param _object an object
* @param _column a column
* @return index of object and column
*/
QModelIndex TreeModel::getModelIndex(TreeItem* _object, int _column ){
// root item gets an invalid QModelIndex
if ( _object == rootItem_ )
return QModelIndex();
QModelIndex index = createIndex(_object->row(), _column, _object);
return index;
}
//******************************************************************************
/** \brief Recursively update a column up to the root of the tree
*
* @param _item item to start with
*/
void TreeModel::propagateUpwards(TreeItem* _item, int _column, bool _value ){
if ( isRoot(_item) || (!_item->isGroup()) )
return;
if (_column == 1){ //visibility
_item->visible( _value );
//the whole row has to be updated because of the grey background-color
QModelIndex index0 = getModelIndex(_item,0);
QModelIndex index1 = getModelIndex(_item,3);
emit dataChanged( index0, index1);
} else {
QModelIndex index = getModelIndex(_item,_column);
emit dataChanged(index, index);
}
propagateUpwards( _item->parent(), _column, _value );
}
//******************************************************************************
/** \brief Recursively update a column up to the root of the tree
*
* @param _item item to start with
*/
void TreeModel::propagateDownwards(TreeItem* _item, int _column ){
for (int i=0; i < _item->childCount(); i++){
TreeItem* current = _item->child(i);
bool changed = false;
switch ( _column ){
case 1: //VISIBILTY
if ( current->visible() != _item->visible() ){
current->visible( _item->visible() );
changed = true;
}
break;
case 2: //SOURCE
if ( current->source() != _item->source() ){
current->source( _item->source() );
changed = true;
}
break;
case 3: //TARGET
if ( current->target() != _item->target() ){
current->target( _item->target() );
changed = true;
}
break;
default:
break;
}
if (changed){
QModelIndex index = getModelIndex(current,_column);
emit dataChanged(index, index);
}
if ( current->isGroup() )
propagateDownwards(current, _column);
}
}
//******************************************************************************
/** \brief Set Data at 'index' to 'value' *
* @param index a ModelIndex defining the positin in the model
* @param value the new value
* @param unused
* @return return if the data was set successfully
*/
bool TreeModel::setData(const QModelIndex &index, const QVariant &value, int /*role*/)
{
emit dataChangedInside( itemId(index), index.column(), value );
return true;
}
//******************************************************************************
/** \brief return if an object is equal to the root object
*
* @param _item the item to be checked
* @return is it the root object?
*/
bool TreeModel::isRoot(TreeItem * _item) {
return ( _item == rootItem_ );
}
/*******************************************************************************
drag & drop stuff
*******************************************************************************/
/** \brief return the supported drop actions
*
* @return drop actions
*/
Qt::DropActions TreeModel::supportedDropActions() const
{
return /*Qt::CopyAction |*/ Qt::MoveAction;
}
//******************************************************************************
/** \brief return the mimeType for drag & drop
*
* @return the mimeType
*/
QStringList TreeModel::mimeTypes() const
{
QStringList types;
types << "DataControl/dragDrop";
return types;
}
//******************************************************************************
/** \brief generate mimeData for given ModelIndexes
*
* @param indexes list of ModelIndexes
* @return the mimeData
*/
QMimeData* TreeModel::mimeData(const QModelIndexList& indexes) const
{
QMimeData *mimeData = new QMimeData();
QByteArray encodedData;
QDataStream stream(&encodedData, QIODevice::WriteOnly);
QVector< int > rows;
foreach (QModelIndex index, indexes) {
if (index.isValid()) {
if (!rows.contains( index.row() ) ){
TreeItem *item = getItem(index);
stream << item->id();
rows.push_back( index.row() );
}
}
}
mimeData->setData("DataControl/dragDrop", encodedData);
return mimeData;
}
//******************************************************************************
/** \brief this is called when mimeData is dropped
*
* @param data the dropped data
* @param action the definition of the dropAction which occured
* @param unused
* @param unused
* @param parent parent under which the drop occurred
* @return returns if the drop was sucessful
*/
bool TreeModel::dropMimeData(const QMimeData *data,
Qt::DropAction action, int /*row*/, int /*column*/, const QModelIndex &parent)
{
if (action == Qt::IgnoreAction)
return true;
if (!data->hasFormat("DataControl/dragDrop"))
return false;
QByteArray encodedData = data->data("DataControl/dragDrop");
QDataStream stream(&encodedData, QIODevice::ReadOnly);
QVector< int > ids;
while (!stream.atEnd()) {
int id;
stream >> id;
ids.push_back( id );
}
if (ids.count() == 0)
return false;
//get new parent
TreeItem *newParent = getItem(parent);
if ( newParent == 0 || !newParent->isGroup() )
return false;
//and move all objects
for (int i = 0; i < ids.count(); i++){
//tell the DataControlPlugin to move the corresponding BaseObject
emit moveBaseObject( ids[i], newParent->id() );
}
return true;
}