treemodel.cpp
author insilmaril
Tue, 28 Apr 2009 20:53:44 +0000
changeset 759 bf3ea1f1520b
parent 757 c6908bc17d78
child 760 59614eaf5fbb
permissions -rw-r--r--
minor fixes
insilmaril@725
     1
#include <QtGui>
insilmaril@725
     2
insilmaril@741
     3
#include <iostream>
insilmaril@741
     4
using namespace std;
insilmaril@741
     5
insilmaril@750
     6
#include "branchitem.h"
insilmaril@725
     7
#include "treeitem.h"
insilmaril@725
     8
#include "treemodel.h"
insilmaril@725
     9
insilmaril@725
    10
TreeModel::TreeModel(QObject *parent)
insilmaril@725
    11
    : QAbstractItemModel(parent)
insilmaril@725
    12
{
insilmaril@725
    13
    QList<QVariant> rootData;
insilmaril@725
    14
    rootData << "Heading" << "Type" <<"Note";
insilmaril@725
    15
    rootItem = new TreeItem(rootData);
insilmaril@725
    16
}
insilmaril@725
    17
insilmaril@725
    18
TreeModel::~TreeModel()
insilmaril@725
    19
{
insilmaril@725
    20
    delete rootItem;
insilmaril@725
    21
}
insilmaril@725
    22
insilmaril@725
    23
QVariant TreeModel::data(const QModelIndex &index, int role) const
insilmaril@725
    24
{
insilmaril@725
    25
    if (!index.isValid())
insilmaril@725
    26
        return QVariant();
insilmaril@725
    27
insilmaril@725
    28
    if (role != Qt::DisplayRole)
insilmaril@725
    29
        return QVariant();
insilmaril@725
    30
insilmaril@745
    31
    TreeItem *item = getItem (index);
insilmaril@725
    32
insilmaril@725
    33
    return item->data(index.column());
insilmaril@725
    34
}
insilmaril@725
    35
insilmaril@725
    36
Qt::ItemFlags TreeModel::flags(const QModelIndex &index) const
insilmaril@725
    37
{
insilmaril@725
    38
    if (!index.isValid())
insilmaril@725
    39
        return Qt::ItemIsEnabled;
insilmaril@725
    40
insilmaril@725
    41
    return Qt::ItemIsEnabled | Qt::ItemIsSelectable;
insilmaril@725
    42
}
insilmaril@725
    43
insilmaril@725
    44
QVariant TreeModel::headerData(int section, Qt::Orientation orientation,
insilmaril@725
    45
                               int role) const
insilmaril@725
    46
{
insilmaril@725
    47
    if (orientation == Qt::Horizontal && role == Qt::DisplayRole)
insilmaril@725
    48
        return rootItem->data(section);
insilmaril@725
    49
insilmaril@725
    50
    return QVariant();
insilmaril@725
    51
}
insilmaril@725
    52
insilmaril@725
    53
QModelIndex TreeModel::index(int row, int column, const QModelIndex &parent)
insilmaril@725
    54
            const
insilmaril@725
    55
{
insilmaril@725
    56
    TreeItem *parentItem;
insilmaril@725
    57
insilmaril@725
    58
    if (!parent.isValid())
insilmaril@725
    59
        parentItem = rootItem;
insilmaril@725
    60
    else
insilmaril@745
    61
        parentItem = getItem (parent);
insilmaril@725
    62
insilmaril@725
    63
    TreeItem *childItem = parentItem->child(row);
insilmaril@725
    64
    if (childItem)
insilmaril@725
    65
        return createIndex(row, column, childItem);
insilmaril@725
    66
    else
insilmaril@725
    67
        return QModelIndex();
insilmaril@725
    68
}
insilmaril@725
    69
insilmaril@725
    70
QModelIndex TreeModel::parent(const QModelIndex &index) const
insilmaril@725
    71
{
insilmaril@725
    72
    if (!index.isValid())
insilmaril@725
    73
        return QModelIndex();
insilmaril@725
    74
insilmaril@745
    75
    TreeItem *ti= getItem (index);
insilmaril@745
    76
    TreeItem *parentItem = ti->parent();
insilmaril@725
    77
insilmaril@745
    78
	//cout << "TreeModel::parent  ti="<<ti<<" "<<ti->getHeading().toStdString()<<"  pi="<<parentItem<<"  "<<endl;
insilmaril@725
    79
    if (parentItem == rootItem)
insilmaril@725
    80
        return QModelIndex();
insilmaril@725
    81
insilmaril@745
    82
	if (!parentItem)
insilmaril@746
    83
        return QModelIndex();	// FIXME-3 do this to avoid segfault, but why?
insilmaril@746
    84
		                        // see also my question on qt-interest in march
insilmaril@745
    85
insilmaril@745
    86
    return createIndex(parentItem->childNumber(), 0, parentItem);
insilmaril@725
    87
}
insilmaril@725
    88
insilmaril@725
    89
int TreeModel::rowCount(const QModelIndex &parent) const
insilmaril@725
    90
{
insilmaril@725
    91
    TreeItem *parentItem;
insilmaril@725
    92
insilmaril@725
    93
    if (!parent.isValid())
insilmaril@725
    94
        parentItem = rootItem;
insilmaril@725
    95
    else
insilmaril@745
    96
        parentItem = getItem (parent);
insilmaril@725
    97
insilmaril@725
    98
    return parentItem->childCount();
insilmaril@725
    99
}
insilmaril@725
   100
insilmaril@741
   101
int TreeModel::columnCount(const QModelIndex &parent) const
insilmaril@726
   102
{
insilmaril@741
   103
    if (parent.isValid())
insilmaril@745
   104
        return getItem (parent)->columnCount();
insilmaril@741
   105
    else
insilmaril@741
   106
        return rootItem->columnCount();
insilmaril@726
   107
}
insilmaril@726
   108
insilmaril@750
   109
BranchItem* TreeModel::next(BranchItem* &current, BranchItem* &previous, int &d0)
insilmaril@741
   110
{
insilmaril@741
   111
	// Walk through map beginning at current with previous==0
insilmaril@741
   112
	// Start at root, if current==NULL
insilmaril@750
   113
	if (!current) current=(BranchItem*)rootItem;
insilmaril@741
   114
insilmaril@741
   115
	// Are we just beginning to walk the map?
insilmaril@741
   116
	if (!previous)
insilmaril@741
   117
	{
insilmaril@741
   118
		previous=current;
insilmaril@741
   119
		d0=current->depth();
insilmaril@741
   120
		current=current->getFirstBranch();
insilmaril@741
   121
		return current;
insilmaril@741
   122
	}
insilmaril@741
   123
insilmaril@741
   124
	//std::cout << " cur="<<current->getHeading().toStdString();
insilmaril@741
   125
	//std::cout << " prev="<<previous->getHeading().toStdString()<<std::endl;
insilmaril@741
   126
insilmaril@741
   127
	// Going up or down (deeper)?
insilmaril@741
   128
	if (current->depth() > previous->depth() )
insilmaril@741
   129
	{	
insilmaril@741
   130
		// Coming from above
insilmaril@741
   131
		// Trying  to go down deeper
insilmaril@741
   132
		if (current->branchCount() >0 )
insilmaril@741
   133
		{
insilmaril@741
   134
			previous=current;
insilmaril@741
   135
			current=current->getFirstBranch();
insilmaril@741
   136
			return current;
insilmaril@741
   137
		}	
insilmaril@741
   138
		// turn around and go up again
insilmaril@741
   139
	}	
insilmaril@741
   140
insilmaril@741
   141
	// Coming from below,
insilmaril@741
   142
	// Trying to go down again to siblings
insilmaril@741
   143
insilmaril@750
   144
	BranchItem *sibling=current->getBranchNum (previous->num()+1);
insilmaril@741
   145
insilmaril@741
   146
	if (sibling)
insilmaril@741
   147
	{	
insilmaril@741
   148
		// Found sibling of previous, go there
insilmaril@741
   149
		previous=current;
insilmaril@741
   150
		current=sibling;
insilmaril@741
   151
		return current;
insilmaril@741
   152
	} 
insilmaril@741
   153
insilmaril@741
   154
	// Go up and try to find siblings of current
insilmaril@741
   155
	previous=current;
insilmaril@750
   156
	current=(BranchItem*)current->parent();
insilmaril@741
   157
insilmaril@741
   158
	// Check if we still can go somewhere
insilmaril@741
   159
	if (!current) return current;
insilmaril@741
   160
	
insilmaril@741
   161
	while (current && current->depth() < previous->depth() )
insilmaril@741
   162
		next (current,previous,d0);
insilmaril@741
   163
		
insilmaril@741
   164
	return current;
insilmaril@741
   165
}
insilmaril@741
   166
insilmaril@745
   167
bool TreeModel::insertRows ( int row, int count, const QModelIndex & parent)
insilmaril@745
   168
{
insilmaril@745
   169
	std::cout << "TreeModel insertRows()\n";
insilmaril@745
   170
	int last=row+count-1;
insilmaril@745
   171
	beginInsertRows (parent,row,last);
insilmaril@745
   172
insilmaril@745
   173
	for (int i=row; i<=last; i++)
insilmaril@745
   174
	{
insilmaril@745
   175
		std::cout << "TreeModel::insertRows inserting i="<<i<<std::endl;
insilmaril@745
   176
	}
insilmaril@745
   177
	endInsertRows ();
insilmaril@745
   178
	return true;
insilmaril@745
   179
}
insilmaril@745
   180
insilmaril@727
   181
bool TreeModel::removeRows ( int row, int count, const QModelIndex & parent)
insilmaril@727
   182
{
insilmaril@727
   183
	int last=row+count-1;
insilmaril@745
   184
    TreeItem *pi= getItem (parent);
insilmaril@755
   185
	TreeItem *ti;
insilmaril@727
   186
	beginRemoveRows (parent,row,last);
insilmaril@727
   187
insilmaril@727
   188
	for (int i=row; i<=last; i++)
insilmaril@727
   189
	{
insilmaril@755
   190
		ti=pi->getChildNum (row);
insilmaril@755
   191
		pi->removeChild (row);	// does not delete object!
insilmaril@756
   192
		switch (ti->getType()) 
insilmaril@756
   193
		{
insilmaril@756
   194
			case TreeItem::MapCenter: 
insilmaril@756
   195
				delete (BranchItem*)ti; 
insilmaril@756
   196
				break;
insilmaril@756
   197
			case TreeItem::Branch:
insilmaril@756
   198
				delete (BranchItem*)ti; 
insilmaril@756
   199
				break;
insilmaril@756
   200
			default:
insilmaril@756
   201
				delete ti;
insilmaril@756
   202
				break;
insilmaril@756
   203
		}
insilmaril@727
   204
	}
insilmaril@745
   205
	endRemoveRows ();
insilmaril@745
   206
	return true;
insilmaril@745
   207
}
insilmaril@727
   208
insilmaril@745
   209
TreeItem *TreeModel::getItem(const QModelIndex &index) const
insilmaril@745
   210
{
insilmaril@745
   211
    if (index.isValid()) {
insilmaril@745
   212
		TreeItem *item = static_cast<TreeItem*>(index.internalPointer());
insilmaril@745
   213
insilmaril@745
   214
        if (item) return item;
insilmaril@745
   215
    }
insilmaril@745
   216
    return rootItem;
insilmaril@727
   217
}
insilmaril@727
   218
insilmaril@754
   219
TreeItem *TreeModel::getRootItem()
insilmaril@754
   220
{
insilmaril@754
   221
	return rootItem;
insilmaril@754
   222
}
insilmaril@754
   223
insilmaril@726
   224
QModelIndex TreeModel::index (TreeItem* ti)
insilmaril@726
   225
{
insilmaril@726
   226
	return createIndex (ti->row(),ti->column(),ti);
insilmaril@726
   227
}
insilmaril@726
   228