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POHow to repace an element in a Qt tree widget?
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copied!<p>I have a Qt application that contains a QTreeWidget. I want to replace one of the items.</p> <p>I have a pointer: </p> <pre><code>QTreeWidgetItem *elementToSubstitute; </code></pre> <p>and a function that returns a <code>QTreeWidgetItem*</code>.</p> <p>I want to overwrite the previous one with this new element, in the same place. If I delete the previous element and insert the new one after that, the new item is placed at the bottom of the tree.</p> <p>How should I proceed to have the new branch replace exactly the previous one?</p> <p><strong>EDIT for example</strong></p> <hr> <pre><code>void MainWindow::addRoot(QString name ,QString description) { QTreeWidgetItem *itm = new QTreeWidgetItem(ui->tree); itm->setText(0,name); itm->setText(1,description); QTreeWidgetItem *child1 = addChild(itm,"one","hello"); QTreeWidgetItem *child2 = addChild(itm,"two","hello"); QTreeWidgetItem *child3 = addChild(itm,"tree","hello"); QTreeWidgetItem *child4 = addChild(itm,"four","hello"); QTreeWidgetItem *parent = child2->parent(); int itemIndex = parent-indexOfChid(child2); parent->removeChild(child2); parent->insertChild(itemIndex, child4 ); } QTreeWidgetItem MainWindow::addChild(QTreeWidgetItem *parent,QString name ,QString description) { QTreeWidgetItem *itm = new QTreeWidgetItem(); itm->setFlags(Qt::ItemIsSelectable | Qt::ItemIsUserCheckable | Qt::ItemIsEnabled | Qt::ItemIsDragEnabled ); itm->setText(0,name); itm->setText(1,description); addChild2(itm,"sub-one","subchild2"); addChild2(itm,"sub-two","subchild2"); addChild2(itm,"sub-tree","subchild2"); parent->addChild(itm); return itm; } void MainWindow::addChild2(QTreeWidgetItem *parent,QString name ,QString description) { QTreeWidgetItem *itm = new QTreeWidgetItem(); itm->setFlags(Qt::ItemIsSelectable | Qt::ItemIsUserCheckable | Qt::ItemIsEnabled | Qt::ItemIsDragEnabled | Qt::ItemIsEditable); itm->setText(0,name); itm->setText(1,description); itm->setText(2,"test third coloumn"); parent->addChild(itm); } </code></pre> <p>.....</p> <p>Now i have a pointer to one of the chiled. ( let's sa of level 1) ans i want to replace it with another. for instance i want to replace child "2" with child "4" but i want this to be put in the place f child 2.</p>

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