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  1. #1
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    issue in deleting a layout and setting a new layout..

    hi i am trying to delete the old layout and then set the other layout... i used delete layout before setting the new layout... this sets the new layout on top of the old layout and both are visible... is there any function for clearing the screen before setting another layout?

  2. #2
    Super Contributor
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    Re: issue in deleting a layout and setting a new layout..

    Call widget->update();

  3. #3
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    Re: issue in deleting a layout and setting a new layout..

    this also doesnot solve my problem...
    i am posting a sample code... hope it will help ..
    first i am adding a widget to the QGridlayout layout using the following lines.
    Code:
    layout->addWidget(treeWidget,0,0);
    setLayout(layout);
    then removing that widget and updating and deleting the gridlayout.
    Code:
    layout->removeWidget(treeWidget);
    layout->update();
    delete layout;
    here i am trying to set the new gridlayout on screen
    Code:
    layout1->addWidget(checkbox,j,0);
    setLayout(layout1);
    if i do like this the layout recently set appears over the old one...
    Last edited by divanov; 2010-10-05 at 08:36. Reason: forcing CODE tag

  4. #4
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    Re: issue in deleting a layout and setting a new layout..

    Did you consider possibility to re-use layout?
    Code:
    layout->addWidget(treeWidget,0,0);
    setLayout(layout);
    // do something
    layout->removeWidget(treeWidget);
    layout->addWidget(checkbox,j,0);

  5. #5
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    Re: issue in deleting a layout and setting a new layout..

    yeah ... but that also didnot work as expected..

  6. #6
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    Re: issue in deleting a layout and setting a new layout..

    Quote Originally Posted by sathyanarayanan.se View Post
    yeah ... but that also didnot work as expected..
    This must work as expected unless there is something else in your code.

  7. #7
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    Re: issue in deleting a layout and setting a new layout..

    i dont find any problem with my code... ok do u mean that reusing the layout is the only option and creating another layout and setting it cannot be done?

  8. #8
    Super Contributor
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    Re: issue in deleting a layout and setting a new layout..

    Quote Originally Posted by sathyanarayanan.se View Post
    i dont find any problem with my code... ok do u mean that reusing the layout is the only option and creating another layout and setting it cannot be done?
    If you don't find problems it doesn't mean they are absent. You can measure performance to see that re-using is actually faster.

  9. #9
    Nokia Developer Moderator
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    Re: issue in deleting a layout and setting a new layout..

    Quote Originally Posted by sathyanarayanan.se View Post
    i dont find any problem with my code... ok do u mean that reusing the layout is the only option and creating another layout and setting it cannot be done?
    If you are operating with two layouts, you will need to synchronize their relation/appearance yourself, while if you are reusing one layout, it's both faster and avoids the need for strategically placed calls to update, processEvents, show and similar. If your layout break because of this, then you are not cleaning things up properly (in plain English: you are solving a problem by introducing a different one )

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