C++/Qt/QDirModel — различия между версиями
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Версия 14:21, 25 мая 2010
Access items from an existing model
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/*
main.cpp
A simple example of how to access items from an existing model.
*/
#include <QtGui>
/*!
Create a default directory model and, using the index-based interface to
the model and some QLabel widgets, populate the window"s layout with the
names of objects in the directory.
Note that we only want to read the filenames in the highest level of the
directory, so we supply a default (invalid) QModelIndex to the model in
order to indicate that we want top-level items.
*/
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QWidget *window = new QWidget;
QVBoxLayout *layout = new QVBoxLayout(window);
QLabel *title = new QLabel("Some items from the directory model", window);
title->setBackgroundRole(QPalette::Base);
title->setMargin(8);
layout->addWidget(title);
QDirModel *model = new QDirModel;
QModelIndex parentIndex = model->index(QDir::currentPath());
int numRows = model->rowCount(parentIndex);
for (int row = 0; row < numRows; ++row) {
QModelIndex index = model->index(row, 0, parentIndex);
QString text = model->data(index, Qt::DisplayRole).toString();
// Display the text in a widget.
QLabel *label = new QLabel(text, window);
layout->addWidget(label);
}
window->setWindowTitle("A simple model example");
window->show();
return app.exec();
}