An example of how to handle multiple concurrent touches using this design:
var touched = map[event.TouchSequenceID]*Widget{}
func touch(t event.Touch) {
if t.Type == event.TouchStart {
if w := widgetAt(t.Loc); w != nil {
touched[t.ID] = w
}
}
if w, ok := touched[t.ID]; ok {
// move/scroll widget, etc
}
if t.Type == event.TouchEnd {
delete(touched, t.ID)
}
}
Change-Id: I79910ef30abe9a41bc0720783022b1af081fbd43
Reviewed-on: https://go-review.googlesource.com/1895
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
Reviewed-by: Burcu Dogan <jbd@google.com>
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Gordon Klaus
David Symonds
Andrew Gerrand
David Crawshaw