Что ж ты будешь делать...
C++ (Qt)
#include <QtGui/QApplication>
#include "widget.h"
#include<QComboBox>
#include<QDirModel>
#include<QTreeView>
#include<QEvent>
#include<QMouseEvent>
#include<QModelIndex>
#include<QDir>
class TreeBox : public QComboBox
{
public:
TreeBox(QWidget* parent = 0) : QComboBox(parent), skipNextHide(false) //Widget creation
{
setView(new QTreeView(this));
view()->viewport()->installEventFilter(this);
QComboBox::resize(200,30);
}
bool eventFilter(QObject* object, QEvent* event)
{
if (event->type() == QEvent::MouseButtonPress && object == view()->viewport())
{
QMouseEvent* mouseEvent = static_cast<QMouseEvent*>(event);
QModelIndex index = view()->indexAt(mouseEvent->pos());
if (!view()->visualRect(index).contains(mouseEvent->pos()))
skipNextHide = true;
}
return false;
}
virtual void showPopup()
{
setRootModelIndex(static_cast<QDirModel*>(model())->index(QDir::rootPath()));
QComboBox::showPopup();
}
virtual void hidePopup()
{
setRootModelIndex(view()->currentIndex().parent());
setCurrentIndex(view()->currentIndex().row());
if (skipNextHide)
skipNextHide = false;
else
QComboBox::hidePopup();
}
private:
bool skipNextHide;
};
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
TreeBox combo; //Class object declaration
QDirModel model;
combo.setModel(&model); //implemention QDir model
combo.show();
return a.exec();
}
