Re:

[Igor Korot <ikorot01 gmail com>]

Paul,

On Wed, Feb 20, 2019 at 12:30 PM Paul Davis <paul linuxaudiosystems com> wrote:
> On Wed, Feb 20, 2019 at 11:10 AM Igor Korot <ikorot01 gmail com> wrote:
> > Hi, Paul,
> >
> > On Wed, Feb 20, 2019 at 12:03 PM Paul Davis <paul linuxaudiosystems com> wrote:
> > > On Wed, Feb 20, 2019 at 10:49 AM Igor Korot via gtk-list <gtk-list gnome org> wrote:
> > > > Why do we even talking about button number, when the doc explicitly said
> > > > "right-click", which implies "right mouse button".
> > >
> > >
> > > X Window (at the very least) allows buttons to be remapped. Button #1 is typically the left mouse 
> > > button, but a user may remap them (eg. left-handed people with a strong preference for using the mouse 
> > > in their left hand). "left" and "right" buttons normally have a semantic meaning (e.g. "the button 
> > > normally used for clicking on things" vs "the button used for context menus etc.") and you cannot hard 
> > > code these on X Window.  More precisely, if you do hard code them, you disenfranchise a set of users who 
> > > remap their mouse buttons.
> >
> > Are you saying that if I map the left mouse button to be the right one
> > and click on it, I will not get that signal?
> >
> > As far as the user code is concerned, the button I press to get the
> > context menu shouldn't matter, because this a low-level signal.
> > All the user code should be aware is - did I click the action button
> > or context menu one. Why do I need to care which is which?
> >
> > Could you give me a scenario?
>
>
> hold the mouse in your right hand. put your index finger on the most naturally positioned button. press it.
>
> by default, X Window will generate a mouse button event using button number one.
>
> now put the mouse in your left hand, put that index finger on the most naturally positioned button, press 
> it.
>
> by default, X Window will generate a mouse button event using button number three.
>
> programmers don't want to deal with this in their code, so they generally assume that button #1 is "left 
> button" and button #3 is "right button".
>
> but what they really mean is "button used for most button clicks" and "button used for context clicks"
>
> a dedicated left-handed user may remap this so that their left index finger correctly generates button 1 - 
> the button used for most clicks.
>
> your code can assume that 1 => most clicks; 3 => context click
>
> it cannot assume that 1 => left ; 3 => right

This is all correct and I'm not arguing about that.

What I do argue is why the context-menu event should care what mouse
button click it comes from?

Let's say I'm using GTK and writing a software.
Why should I care which button click generated my CSM?
As long as I get the event/message/signal I should be happy and will
write a handler where I will
construct the menu and display it.
The user can click the AUX1 button for all I care. But if this button
is not mapped correctly by the system
to generate "right-button click", this event/signal will never arrive/fire.

Am I missing something?
What is the scenario where user code needs to know if the button
pressed was 1, 3 or it was
a keyboard altogether (-1)?

Thank you.

>