Sure, I attached the proxyFilter code. What's also interessting that if I click into the treeview I get a bunch of cout's from the setData instead just a single one.
snip main.cpp
TestModel model;
table->setModel(&model);
ProxyFilter filterModel;
filterModel.setSourceModel(&model);
tree->setModel(&filterModel);
splitter->setWindowTitle("Test views");
splitter->show();
return app.exec();
}
snip main.cpp
TestModel model;
QSplitter *splitter = new QSplitter;
QTreeView *tree = new QTreeView(splitter);
QTableView *table = new QTableView(splitter);
table->setModel(&model);
table->setRootIndex(QModelIndex());
ProxyFilter filterModel;
filterModel.setSourceModel(&model);
tree->setModel(&filterModel);
splitter->setWindowTitle("Test views");
splitter->show();
return app.exec();
}
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proxyFilter.cpp:
#include "proxyFilter.h"
#include <iostream>
ProxyFilter::ProxyFilter() {
}
ProxyFilter::~ProxyFilter() {
}
std::cout << "mapFromSource" << std::endl;
if(sourceIndex.isValid())
return createIndex(sourceIndex.row(), sourceIndex.column());
else
}
std::cout << "mapToSource" << std::endl;
return sourceModel()->index(proxyIndex.row(), proxyIndex.column());
}
int ProxyFilter
::columnCount(const QModelIndex & parent
) const {
// return sourceModel()->columnCount(parent);
// filter out all cols - keep only col = 0
return 1;
}
int ProxyFilter
::rowCount(const QModelIndex & parent
) const { return sourceModel()->rowCount(parent);
}
QModelIndex ProxyFilter
::index(int row,
int column,
const QModelIndex
& parent
) const {
return sourceModel()->index(row, column, parent);
}
QModelIndex ProxyFilter
::parent(const QModelIndex
&) const {
}
std::cout << "data: row =" << index.row() << " col=" << index.column() << std::endl;
return sourceModel()->data(index, role);
}
std::cout << "setData: row =" << index.row() << " col=" << index.column() << std::endl;
return sourceModel()->setData(index, value, role);
}
Qt
::ItemFlags ProxyFilter
::flags(const QModelIndex &index
) const {
return sourceModel()->flags(index);
}
connect(sourceModel, SIGNAL(modelReset()), this, SIGNAL(modelReset()));
}
#include "proxyFilter.h"
#include <iostream>
ProxyFilter::ProxyFilter() {
}
ProxyFilter::~ProxyFilter() {
}
QModelIndex ProxyFilter::mapFromSource (const QModelIndex & sourceIndex) const {
std::cout << "mapFromSource" << std::endl;
if(sourceIndex.isValid())
return createIndex(sourceIndex.row(), sourceIndex.column());
else
return QModelIndex();
}
QModelIndex ProxyFilter::mapToSource (const QModelIndex & proxyIndex) const {
std::cout << "mapToSource" << std::endl;
return sourceModel()->index(proxyIndex.row(), proxyIndex.column());
}
int ProxyFilter::columnCount(const QModelIndex & parent) const {
// return sourceModel()->columnCount(parent);
// filter out all cols - keep only col = 0
return 1;
}
int ProxyFilter::rowCount(const QModelIndex & parent) const {
return sourceModel()->rowCount(parent);
}
QModelIndex ProxyFilter::index(int row, int column, const QModelIndex& parent) const {
return sourceModel()->index(row, column, parent);
}
QModelIndex ProxyFilter::parent(const QModelIndex&) const {
return QModelIndex();
}
QVariant ProxyFilter::data(const QModelIndex & index, int role) const {
std::cout << "data: row =" << index.row() << " col=" << index.column() << std::endl;
return sourceModel()->data(index, role);
}
bool ProxyFilter::setData(const QModelIndex &index, const QVariant &value, int role) {
std::cout << "setData: row =" << index.row() << " col=" << index.column() << std::endl;
return sourceModel()->setData(index, value, role);
}
Qt::ItemFlags ProxyFilter::flags(const QModelIndex &index) const {
return sourceModel()->flags(index);
}
void ProxyFilter::setSourceModel(QAbstractItemModel *sourceModel) {
connect(sourceModel, SIGNAL(modelReset()), this, SIGNAL(modelReset()));
QAbstractProxyModel::setSourceModel(sourceModel);
}
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proxyFilter.h:
#ifndef PROXYFILTER_H
#define PROXYFILTER_H
#include <QAbstractProxyModel>
#include <QAbstractItemModel>
Q_OBJECT
public:
ProxyFilter();
~ProxyFilter();
};
#endif
#ifndef PROXYFILTER_H
#define PROXYFILTER_H
#include <QAbstractProxyModel>
#include <QAbstractItemModel>
class ProxyFilter : public QAbstractProxyModel {
Q_OBJECT
public:
ProxyFilter();
~ProxyFilter();
int columnCount(const QModelIndex & parent = QModelIndex()) const;
int rowCount(const QModelIndex & parent = QModelIndex()) const;
QModelIndex mapFromSource (const QModelIndex & sourceIndex) const;
QModelIndex mapToSource (const QModelIndex & proxyIndex) const;
QModelIndex index(int row, int column, const QModelIndex& parent = QModelIndex()) const;
QModelIndex parent(const QModelIndex&) const ;
QVariant data(const QModelIndex & index, int role) const;
bool setData (const QModelIndex &index, const QVariant &value, int role);
Qt::ItemFlags flags(const QModelIndex &index) const;
void setSourceModel(QAbstractItemModel *sourceModel);
};
#endif
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data, model and tree view
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Anyway, everytime you use indexes with the source model, you have to map them to the source model space using mapToSource(). And everytime where you get an index from the source model, you should map it to the proxy model space using mapFromSource.
Originally Posted by larry104
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