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| author | David Robillard <d@drobilla.net> | 2021-12-17 10:43:11 -0500 |
|---|---|---|
| committer | David Robillard <d@drobilla.net> | 2021-12-17 11:18:04 -0500 |
| commit | 6ca68635e8cef8407e91bc9542edf196ef708210 (patch) | |
| tree | 3eac52f9fff833979e348b7e89b3a9f19628d34a /include/pugl | |
| parent | cea2a9b9f454192bccb1bf0b1f5561d601022d00 (diff) | |
| download | pugl-6ca68635e8cef8407e91bc9542edf196ef708210.tar.gz pugl-6ca68635e8cef8407e91bc9542edf196ef708210.tar.bz2 pugl-6ca68635e8cef8407e91bc9542edf196ef708210.zip | |
Make button numbers consistent across platforms
There's no universal consensus on how buttons are numbered. Left, right,
middle as 0, 1, 2 seems to be the most common convention on modern vaguely
similar libraries, so I've gone with that.
The switch to zero-based indices will obviously break all current client code.
Particularly since now is the time to finish any breaking changes before a
stable release, I think that is better than only changing the middle and right
numbers, which would likely go unnoticed.
Diffstat (limited to 'include/pugl')
| -rw-r--r-- | include/pugl/pugl.h | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/include/pugl/pugl.h b/include/pugl/pugl.h index 71578a9..4d26604 100644 --- a/include/pugl/pugl.h +++ b/include/pugl/pugl.h @@ -419,6 +419,21 @@ typedef struct { /** Button press or release event. + + Button numbers start from 0, and are ordered: primary, secondary, middle. + So, on a typical right-handed mouse, the button numbers are: + + Left: 0 + Right: 1 + Middle (often a wheel): 2 + + Higher button numbers are reported in the same order they are represented on + the system. There is no universal standard here, but buttons 3 and 4 are + typically a pair of buttons or a rocker, which are usually bound to "back" + and "forward" operations. + + Note that these numbers may differ from those used on the underlying + platform, since they are manipulated to provide a consistent portable API. */ typedef struct { PuglEventType type; ///< #PUGL_BUTTON_PRESS or #PUGL_BUTTON_RELEASE @@ -429,7 +444,7 @@ typedef struct { double xRoot; ///< Root-relative X coordinate double yRoot; ///< Root-relative Y coordinate PuglMods state; ///< Bitwise OR of #PuglMod flags - uint32_t button; ///< Button number starting from 1 + uint32_t button; ///< Button number starting from 0 } PuglButtonEvent; /** |