delegate :
------------------------------------
{
}
view :
----------------------------------------------
// on utilise un delegate pour avoir un affichage personnalise
DelegateCaracs* del=new DelegateCaracs(this );
setItemDelegate(del);
header()->hide();
// on autorise le drag and drop
setDragEnabled(true);
setAcceptDrops(true);
setDropIndicatorShown(true);
// la selection est de couleur jaune (sinon sous linux on ne voit pas le texte)
couleurJaunePale.setRgb(243,247,126);
QBrush yellowBrush
(couleurJaunePale
);
p.
setBrush(QPalette::Highlight,yellowBrush
);
setPalette(p);
}
itemModel
------------------------------------------------
#include <QStringList>
#include "treeitem.h"
TreeItem::TreeItem(const QList<QVariant> &data, TreeItem *parent)
{
parentItem = parent;
itemData = data;
}
TreeItem::~TreeItem()
{
qDeleteAll(childItems);
}
void TreeItem::appendChild(TreeItem *item)
{
childItems.append(item);
}
TreeItem *TreeItem::child(int row)
{
return childItems.value(row);
}
int TreeItem::childCount() const
{
return childItems.count();
}
int TreeItem::columnCount() const
{
return itemData.count();
}
QVariant TreeItem
::data(int column
) const {
return itemData.value(column);
}
TreeItem *TreeItem::parent()
{
return parentItem;
}
int TreeItem::row() const
{
if (parentItem)
return parentItem->childItems.indexOf(const_cast<TreeItem*>(this));
return 0;
}
Model
---------------------------
{
QList<QVariant> rootData;
rootData << "Title" << "Summary";
rootItem = new TreeItem(rootData);
setupModelData
(data.
split(QString("\n")), rootItem
);
}
TreeModel::~TreeModel()
{
delete rootItem;
}
int TreeModel
::columnCount(const QModelIndex &parent
) const {
if (parent.isValid())
return static_cast<TreeItem*>(parent.internalPointer())->columnCount();
else
return rootItem->columnCount();
}
{
if (!index.isValid())
if (role != Qt::DisplayRole)
TreeItem *item = static_cast<TreeItem*>(index.internalPointer());
return item->data(index.column());
}
Qt
::ItemFlags TreeModel
::flags(const QModelIndex &index
) const {
if (!index.isValid())
return Qt::ItemIsEnabled;
return Qt::ItemIsEnabled | Qt::ItemIsSelectable| Qt::ItemIsEditable;
}
QVariant TreeModel
::headerData(int section, Qt
::Orientation orientation,
int role) const
{
if (orientation == Qt::Horizontal && role == Qt::DisplayRole)
return rootItem->data(section);
}
const
{
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
}
{
if (!index.isValid())
TreeItem *childItem = static_cast<TreeItem*>(index.internalPointer());
TreeItem *parentItem = childItem->parent();
if (parentItem == rootItem)
return createIndex(parentItem->row(), 0, parentItem);
}
int TreeModel
::rowCount(const QModelIndex &parent
) const {
TreeItem *parentItem;
if (!parent.isValid())
parentItem = rootItem;
else
parentItem = static_cast<TreeItem*>(parent.internalPointer());
return parentItem->childCount();
}
void TreeModel
::setupModelData(const QStringList &lines, TreeItem
*parent
) {
QList<TreeItem*> parents;
QList<int> indentations;
parents << parent;
indentations << 0;
qDebug("%d", lines.size());
int number = 0;
while (number < lines.count()) {
int position = 0;
while (position < lines[number].length()) {
if (lines[number].mid(position, 1) != " ")
break;
position++;
}
QString lineData
= lines
[number
].
mid(position
).
trimmed();
if (!lineData.isEmpty()) {
// Read the column data from the rest of the line.
QList<QVariant> columnData;
for (int column = 0; column < columnStrings.count(); ++column)
columnData << columnStrings[column];
if (position > indentations.last()) {
// The last child of the current parent is now the new parent
// unless the current parent has no children.
if (parents.last()->childCount() > 0) {
parents << parents.last()->child(parents.last()->childCount()-1);
indentations << position;
}
} else {
while (position < indentations.last() && parents.count() > 0) {
parents.pop_back();
indentations.pop_back();
}
}
// Append a new item to the current parent's list of children.
parents.last()->appendChild(new TreeItem(columnData, parents.last()));
}
number++;
}
}
and main
-------------------------
int main(int argc, char *argv[])
{
TreeModel model("toto");
VueSelects view;
view.setModel(&model);
view.
setWindowTitle(QObject::tr("Simple Tree Model"));
view.show();
return app.exec();
}
delegate :
------------------------------------
DelegateCaracs::DelegateCaracs( QObject *parent): QItemDelegate(parent){}
QWidget *DelegateCaracs::createEditor(QWidget *parent, const QStyleOptionViewItem & option, const QModelIndex &index) const
{
return new QPushButton(parent);
}
view :
----------------------------------------------
ueSelects::VueSelects():QTreeView(){
// on utilise un delegate pour avoir un affichage personnalise
DelegateCaracs* del=new DelegateCaracs(this );
setItemDelegate(del);
header()->hide();
// on autorise le drag and drop
setDragEnabled(true);
setAcceptDrops(true);
setDropIndicatorShown(true);
setSelectionMode(QAbstractItemView::ExtendedSelection);
// la selection est de couleur jaune (sinon sous linux on ne voit pas le texte)
QPalette p = palette();
QColor couleurJaunePale = QColor(Qt::white);
couleurJaunePale.setRgb(243,247,126);
QBrush yellowBrush(couleurJaunePale);
p.setBrush(QPalette::Highlight,yellowBrush);
setPalette(p);
}
itemModel
------------------------------------------------
#include <QStringList>
#include "treeitem.h"
TreeItem::TreeItem(const QList<QVariant> &data, TreeItem *parent)
{
parentItem = parent;
itemData = data;
}
TreeItem::~TreeItem()
{
qDeleteAll(childItems);
}
void TreeItem::appendChild(TreeItem *item)
{
childItems.append(item);
}
TreeItem *TreeItem::child(int row)
{
return childItems.value(row);
}
int TreeItem::childCount() const
{
return childItems.count();
}
int TreeItem::columnCount() const
{
return itemData.count();
}
QVariant TreeItem::data(int column) const
{
return itemData.value(column);
}
TreeItem *TreeItem::parent()
{
return parentItem;
}
int TreeItem::row() const
{
if (parentItem)
return parentItem->childItems.indexOf(const_cast<TreeItem*>(this));
return 0;
}
Model
---------------------------
TreeModel::TreeModel(const QString &data, QObject *parent)
: QAbstractItemModel(parent)
{
QList<QVariant> rootData;
rootData << "Title" << "Summary";
rootItem = new TreeItem(rootData);
setupModelData(data.split(QString("\n")), rootItem);
}
TreeModel::~TreeModel()
{
delete rootItem;
}
int TreeModel::columnCount(const QModelIndex &parent) const
{
if (parent.isValid())
return static_cast<TreeItem*>(parent.internalPointer())->columnCount();
else
return rootItem->columnCount();
}
QVariant TreeModel::data(const QModelIndex &index, int role) const
{
if (!index.isValid())
return QVariant();
if (role != Qt::DisplayRole)
return QVariant();
TreeItem *item = static_cast<TreeItem*>(index.internalPointer());
return item->data(index.column());
}
Qt::ItemFlags TreeModel::flags(const QModelIndex &index) const
{
if (!index.isValid())
return Qt::ItemIsEnabled;
return Qt::ItemIsEnabled | Qt::ItemIsSelectable| Qt::ItemIsEditable;
}
QVariant TreeModel::headerData(int section, Qt::Orientation orientation,
int role) const
{
if (orientation == Qt::Horizontal && role == Qt::DisplayRole)
return rootItem->data(section);
return QVariant();
}
QModelIndex TreeModel::index(int row, int column, const QModelIndex &parent)
const
{
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();
}
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);
}
int TreeModel::rowCount(const QModelIndex &parent) const
{
TreeItem *parentItem;
if (!parent.isValid())
parentItem = rootItem;
else
parentItem = static_cast<TreeItem*>(parent.internalPointer());
return parentItem->childCount();
}
void TreeModel::setupModelData(const QStringList &lines, TreeItem *parent)
{
QList<TreeItem*> parents;
QList<int> indentations;
parents << parent;
indentations << 0;
qDebug("%d", lines.size());
int number = 0;
while (number < lines.count()) {
int position = 0;
while (position < lines[number].length()) {
if (lines[number].mid(position, 1) != " ")
break;
position++;
}
QString lineData = lines[number].mid(position).trimmed();
if (!lineData.isEmpty()) {
// Read the column data from the rest of the line.
QStringList columnStrings = lineData.split("\t", QString::SkipEmptyParts);
QList<QVariant> columnData;
for (int column = 0; column < columnStrings.count(); ++column)
columnData << columnStrings[column];
if (position > indentations.last()) {
// The last child of the current parent is now the new parent
// unless the current parent has no children.
if (parents.last()->childCount() > 0) {
parents << parents.last()->child(parents.last()->childCount()-1);
indentations << position;
}
} else {
while (position < indentations.last() && parents.count() > 0) {
parents.pop_back();
indentations.pop_back();
}
}
// Append a new item to the current parent's list of children.
parents.last()->appendChild(new TreeItem(columnData, parents.last()));
}
number++;
}
}
and main
-------------------------
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
TreeModel model("toto");
VueSelects view;
view.setModel(&model);
view.setWindowTitle(QObject::tr("Simple Tree Model"));
view.show();
return app.exec();
}
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