How to drag the button to change position in GTK4.0?

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There is no “motion_notify event” anymore?
How to implement using mouse to drag the widget?
I’m using gtkmm4.0.

2

Hi,

In Gtk4 input handling has switched to event controllers. You will likely want to use Gtk::GestureDrag and its three signals. All you need to do is create the object, connect the signals, and then add it to your widget with add_controller.

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3

Thanks, gotcha!
And How to draw in the “snapshot_vfunc”?

4

You can read the description of the drawing model in the API reference.

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Thank you! I’m rookie in GTK…
I find the gtkmm is the newest version and choose to use.
although valac is codeless, but the doc is old./(ㄒoㄒ)/~~

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