On Wed, Feb 20, 2019 at 11:10 AM Igor Korot <ikoro...@gmail.com> wrote:
> Hi, Paul, > > On Wed, Feb 20, 2019 at 12:03 PM Paul Davis <p...@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
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