Checked item in QTreeWidget?

[vishal.chauhan]

Hi All,

I am working on qt 4.2.2 on my MAC Tiger.
I have a project in which I am change the state of a QTreeWidgetItem when an item is checked or unchecked.

This is working fine in qt 4.2.2 but when i tried this code on qt 4.3.2 then more often the item is not get checked or unchecked when i click on the item.

I want to ask whether it is due to Qt 4.3.2 or i have to do something different to do it.

Thanks.

[wysota]

Can we see the code?

[vishal.chauhan]

Hi,

I m having a QTreeWidget and inserting item in the treeWidget as follows.

QTreeWidgetItem *item = new QTreeWidgetItem(MyTreeWidget);
  item->setText(0,"My Text");
  item->setIcon(0,icon);
  item->setText(1,"--");		 
  item->setCheckState(0,Qt::Unchecked);

QTreeWidgetItem *item = new QTreeWidgetItem(MyTreeWidget);
  item->setText(0,"My Text");
  item->setIcon(0,icon);
  item->setText(1,"--");		 
  item->setCheckState(0,Qt::Unchecked);

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and when I click on the item in the treeWidget on Qt 4.2.2 it is checked immediately but when i am using this code in Qt 4.3.2 then the item is not checked immediately (often) and sometime it is not even checked and also giving the look of disable treeWidget.

[wysota]

Try adding:

item->setFlags(item->flags()|Qt::ItemIsUserCheckable);

item->setFlags(item->flags()|Qt::ItemIsUserCheckable);

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[vishal.chauhan]

Thanks for reply.

but it doesnot making any difference.
I donot know why the item is getting disable sometimes when click on item.

[jpn]

How do you react to check state changes? Show the slot, please.

[vishal.chauhan]

Actually I m updating the state of the current item parent in the treeWidget and link list.

It has 4 function which i m using and its not possible to post them.
But I can assure that they all are running well in Qt 4.2.2 but donot know why there is a problem in the Qt 4.3.2.

Even if I donot use them then still the item is not checked.

[wysota]

Can you provide a minimal compilable example reproducing the problem?

[vishal.chauhan]

Hi,

I m attaching a code.In it i have a treeWidget on which when i clicked sometimes item is not checked or unchecked.

[jpn]

Does it work properly with another style, for example with plastique?

./app -style plastique

[vishal.chauhan]

Yes the problem remains even after changing the Style.

[vishal.chauhan]

Hi,

No Answer????.
So Am I right it a problem of qt 4.3.2

[jpn]

The only problem I'm experiencing with 4.3.2 is that the area that responds to check state changes is a bit too far left. With 4.3.3 it works perfectly.

[vishal.chauhan]

Hi jpn,

So you are saying that if I use qt 4.3.3 then this problem should not arise.

[jpn]

I can't say for sure. Your description "sometimes item is not checked or unchecked" is vague.

As I said, for me with Qt 4.3.2 check states change but I can notice that the area that reacts to checking is a bit too left, not exactly over the drawn check box (see the attached explanatory screenshot). With Qt 4.3.3 it reacts exactly over the drawn check box.

[vishal.chauhan]

By saying "Sometimes item is not checked or unchecked" I mean that sometimes item check state change on the signle click and sometimes I click several times on item and its check state does not changed.

[jpn]

sometimes item check state change on the signle click and sometimes I click several times on item and its check state does not changed.

Even if you keep mouse at exactly the same position? I don't have such problem with Qt 4.3.2.

[wysota]

Maybe this is OS specific? I don't have 4.3.2 installed anywhere so I can't verify it here, but if J-P tested it and it worked fine, then I don't see why it should fail elsewhere. Could you check if the same thing happens when using examples bundled with Qt?

[vycke]

It appears that the check box in a tree (or list) view doesn't change when checked (4.3.2) -- which if fixed in 4.3.3 means I can remove some code I added to "fix" it.

I added a:

connect(m_list, SIGNAL(itemClicked(QListWidgetItem*)), this, SLOT(clickCheck(QListWidgetItem*)));

connect(m_list, SIGNAL(itemClicked(QListWidgetItem*)), this, SLOT(clickCheck(QListWidgetItem*)));

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and for the slot:

void clickCheck(QListWidgetItem* item)
{
   if (item->checkState() == Qt::Unchecked)
      item->setCheckState(Qt::Checked);
   else
      item->setCheckState(Qt::Unchecked);
}

void clickCheck(QListWidgetItem* item)
{
   if (item->checkState() == Qt::Unchecked)
      item->setCheckState(Qt::Checked);
   else
      item->setCheckState(Qt::Unchecked);
}

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This allows the user to click on the label for the check box & get the box toggled. (Boy, I hope 4.3.3 allows me to remove this code... although it makes it nicer for users, maybe I'll keep it either way)

Vycke