Re: Which button is used on a drag?

["Murray Cumming" <murrayc murrayc com>]

>
> To clarify, Murray, isn't this part of the api reserved for
> drag-and-drop events.

Yes, I suppose so, but I don't know. The GTK+ people might know more.

I hadn't thought of drags that aren't for drops.

> The original poster didn't really specify d-n-d
> behavior, and I'm mostly just curious for my own sake.  I've implemented
> a click-and-drag type of functionality to provide a graphics type of
> drawing.  Something I consider fundamentally different than d-n-d.
>
> The only thing I'm really basing this on is the fact that signals like
> signal_drag_motion have docs that read to the effect of "on the drop
> site."  I've always assumed that *could* implement a drawing type of
> functionality with this part of the api, but I've also always assumed
> that I *shouldn't*, i.e., it'd be a kludge.
>
> Relevant doc link:
> http://www.gtkmm.org/docs/gtkmm-2.4/docs/reference/html/classGtk_1_1Widget.html#eaaa48aa4afa89087f43a19029bd43bd
>
> Although this particular question pretty much boils down to did he mean
> drag-and-drop or the "i want a line to appear when i click a button and
> move the mouse" type of behavior. I'm mostly interested in the latter,
> but I'm always on the look out for better ways to solve a problem.
>
> Thanks,
> Paul
>
> Murray Cumming wrote:
>
>>>On Tue, 2006-08-08 at 08:15 -0500, Mark Tilford wrote:
>>>
>>>
>>>>I want to have different behaviors on right-drag and left-drag.  How
>>>>do I find what button is being used for the drag?
>>>>
>>>>
>>>you have to handle button-press, motion and button-release events. in
>>>the button-press event preceding the motion events, check ev->button for
>>>the button that has been pressed.
>>>
>>>
>>
>>I'd hope that you can just handle the appropriate drag action:
>>http://www.mcs.vuw.ac.nz/technical/software/doc/gtkmm-2.4/docs/reference/html/group__gdkmmEnums.html#g0a9506293be3b3dfe00ecdb83e764ca6
>>
>>I guess that theoretically the user could remap what action he means by
>>left and right drag and you should allow him to do that. Also, it's
>>probably easier than reimplementing the drag API.
>>
>>Or maybe it's just modifier keys that determine which drag action is
>>meant. I'm not sure.
>>
>>Murray Cumming
>>murrayc murrayc com
>>www.murrayc.com
>>www.openismus.com
>>
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Murray Cumming
murrayc murrayc com
www.murrayc.com
www.openismus.com