[SOLVED] Is there a way to detect changes in fields at application runtime?
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Hi, is there a way to detect changes to widgets such as lineedit,radiobutton,combobox etc during runtime?
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What kind of changes ?
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detect changes just as change in a lineedit field or radio button, then prompt a dialog box asking if user wants to save changes
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AFAIK, No, you need to do that explicitly.
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ermm like how? could you please help to elaborate more?
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Hi,
You can use a dirty flag that you'll check e.g. when the user closes your UI. You'll need to create a slot for that that and connect your various input widget to it. The signal you'll need to use will depend on the widget.
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You can directly get notified about changes through the signal/slot mechanism. You can listen to a focus lost event of components as well which does not directly indicate a change but you can check that yourself.
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hi SGaist, could you help to explain more on the 'dirty flag'? Is there an example I can take a look at? Thank you.
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Have a boolean member in you class called e.g. _dirty that is originally set to false and that you set to true when one of your input changes. Don't forget to reset it when appropriate.
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thanks very much!
