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Thread: QTreeWidget: How to display the root item?

  1. #1
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    Default QTreeWidget: How to display the root item?

    Hello.
    I'm building a Qt application with a QTreeWidget. I've got several TopLevelItems each with some childs. But all the Items are "hanging" on the top end of the QTreeWidget like this:
    Qt Code:
    1. |
    2. [-]TopLevelItem1
    3. | |
    4. | -Child1
    5. | |
    6. | -Child2
    7. |
    8. [-]TopLevelItem2
    9. |
    10. -Child3
    To copy to clipboard, switch view to plain text mode 
    I read in the documentation that there is a "invisibleRootItem", but I got no success to make it visible.
    How can I display the root item?
    I wanted to have a tree like this:
    Qt Code:
    1. RootItem
    2. |
    3. [-]TopLevelItem1
    4. | |
    5. | -Child1
    6. | |
    7. | -Child2
    8. |
    9. [-]TopLevelItem2
    10. |
    11. -Child3
    To copy to clipboard, switch view to plain text mode 

  2. #2
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    Default Re: QTreeWidget: How to display the root item?

    You don't want to make it visible. You want to set rootIsDecorated property to false.
    Your biological and technological distinctiveness will be added to our own. Resistance is futile.

    Please ask Qt related questions on the forum and not using private messages or visitor messages.


  3. The following user says thank you to wysota for this useful post:

    Johannes (22nd February 2011)

  4. #3
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    Default Re: QTreeWidget: How to display the root item?

    My primary intention was to display the root item, but your suggestion to try the property rootIsDecorated lead also to a good looking result.
    I tried it and now my topLevelItems are childs and my new topLevelItem looks like a root item. Thanks!

  5. #4
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    Default Re: QTreeWidget: How to display the root item?

    You can't display the invisibleRootItem because it is a fake item used only to have an equivalent of empty QModelIndex.
    Your biological and technological distinctiveness will be added to our own. Resistance is futile.

    Please ask Qt related questions on the forum and not using private messages or visitor messages.


  6. The following user says thank you to wysota for this useful post:

    Johannes (22nd February 2011)

  7. #5
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    Default Re: QTreeWidget: How to display the root item?

    That's a good reason. Thanks for the explanation.

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