Question

问题表明,你如何在树林植被中提出和降低[改变]QTreeWidgetItems的位置,

Answer 1

我认为,你需要使用模范物体才能操纵项目位置(如果你想要这样做的话)。请举一个例子:将抽象模式的第一个项目移至底。

QAbstractItemModel* model = your_tree_view->model();

QModelIndex index0 = model->index(0, 0);
QMap<int, QVariant> data = model->itemData(index0);
// check siblings of the item; should be restored later
model->removeRow(0);

int rowCount = model->rowCount();
model->insertRow(rowCount);
QModelIndex index1 = model->index(rowCount, 0);
model->setItemData(index1, data);

一旦项目在模型中移入,您的树木概貌植被应相应更新。

如有必要改变您的树木情况表所示项目的规模:http://qt.nokia.com/doc/4.6/qetteditemdelegate.html” 方法

希望这一帮助,

Answer 2

I found serge s solution to be quite complicated as well for a simple move up / move down. There s actually a quite easier solution to this issue since you re using QTreeWidget :

QTreeWidgetItem* item = your_qtreewidget->currentItem();
int              row  = your_qtreewidget->currentIndex().row();

if (item && row > 0)
{
    your_qtreewidget->takeTopLevelItem(row);
    your_qtreewidget->insertTopLevelItem(row - 1, item);
    your_qtreewidget->setCurrentItem(item);
}

在这里,你有一项法典,将一个项目移至上。从这一点来看,你们应当能够找到如何在任何时候放下它!

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