GtkAdjustment::set_value
This method sets the adjustment value to a new level. It doesn't work where that value has already been set by a widget or widgets; widget settings always take precedence over manual settings. Where it is allowed, it causes a "value-changed" signal to be emitted, if the value is within the adjustment range.
Adjustable widgets generally have their own wrapper method for setting the adjustment value, which should be used in preference where it exists.
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