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How to enable and control the backlight feature

  • Hi,

    I want to contol the backlight feature in my Ui by setting it to ratio i.e. 25%, 50%, 75% and 100%. I know QDisplayInfo and QMobility will be the answer, but I am not sure how to imply it in the Ui,
    I am using Qt 4.8.2. Also I need to set it through a button.

    Can anyone suggest me anything in this?

    Thanks in advance.

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