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For more information about gtk-Linux general technology-Linux technology and application, see the following. [I = s] This post was last edited by superherogood

I have created three drop-down boxes on one component. The first two drop-down boxes are activated, and the third one is not activated, I want to use the values of the first two drop-down boxes to automatically activate or not activate the last drop-down box. How can I design this? Should it be designed as event activation or signal activation?

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