changing the checkstate of all the child item by checking the root item in Qtree widget
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@kook Why iterator->child?!
First, check the check state of the parent, then apply that state on the children.auto state = item->checkState(0); QTreeWidgetItemIterator iterator(item); while (*iterator) { qDebug()<< (*iterator)->text(0); (*iterator)->setCheckState(0, state); ++iterator; } -
@jsulm the reason i used (*iterator)->child is i have multiple root in the tree i want only that particular root's child to be checked not the whole tree
the solution you have given is doing the latter@kook The solution I gave you iterates over all children of an item, NOT the whole tree.
If you want to change only some children of an item then you need a condition to decide which one to change, right? What is this condition? Can you explain what exactly should happen? -
@kook The solution I gave you iterates over all children of an item, NOT the whole tree.
If you want to change only some children of an item then you need a condition to decide which one to change, right? What is this condition? Can you explain what exactly should happen? -
@jsulm
when i change the message1 state it should change only its children check state
i tried the code you provided its changing the whole tree check statei don't have any specific condition
@kook said in changing the checkstate of all the child item by checking the root item in Qtree widget:
i tried the code you provided its changing the whole tree check state
Then you did something wrong.
What do you pass as item in this line QTreeWidgetItemIterator iterator(item); ?
It needs to be the item user clicked (in your example message1).auto state = item->checkState(0); QTreeWidgetItemIterator iterator(item); while (*iterator) { qDebug()<< (*iterator)->text(0); (*iterator)->setCheckState(0, state); ++iterator; } -
@kook said in changing the checkstate of all the child item by checking the root item in Qtree widget:
i tried the code you provided its changing the whole tree check state
Then you did something wrong.
What do you pass as item in this line QTreeWidgetItemIterator iterator(item); ?
It needs to be the item user clicked (in your example message1).auto state = item->checkState(0); QTreeWidgetItemIterator iterator(item); while (*iterator) { qDebug()<< (*iterator)->text(0); (*iterator)->setCheckState(0, state); ++iterator; } -
@jsulm i am adding the code inside this function
void MainWindow::on_treeWidget_itemChanged(QTreeWidgetItem *item, int column) { } -
@jsulm i am adding the code inside this function
void MainWindow::on_treeWidget_itemChanged(QTreeWidgetItem *item, int column) { }@kook This works:
void MainWindow::on_treeWidget_itemChanged(QTreeWidgetItem *item, int column) for (int i = 0; i < item->childCount(); ++i) { qDebug() << item->child(i)->text(0); on_treeWidget_itemChanged(item->child(i), column); } } -
@kook You're right. This does not work as expected.
You will need to write a recursive method to iterate over all children of an item. -
@kook said in changing the checkstate of all the child item by checking the root item in Qtree widget:
its not changing the checked state of children
Come on, that's because I did not add the code to change the checked state. Add that part:
void MainWindow::on_treeWidget_itemChanged(QTreeWidgetItem *item, int column) for (int i = 0; i < item->childCount(); ++i) { qDebug() << item->child(i)->text(0); item->child(i)->setCheckState(0, item->checkState(0)); on_treeWidget_itemChanged(item->child(i), column); } } -
@kook said in changing the checkstate of all the child item by checking the root item in Qtree widget:
its not changing the checked state of children
Come on, that's because I did not add the code to change the checked state. Add that part:
void MainWindow::on_treeWidget_itemChanged(QTreeWidgetItem *item, int column) for (int i = 0; i < item->childCount(); ++i) { qDebug() << item->child(i)->text(0); item->child(i)->setCheckState(0, item->checkState(0)); on_treeWidget_itemChanged(item->child(i), column); } }
