That's a good hint. I can confirm that on linux everything works as expected. The issue is only on windows. The problem is only with mouse wheel events: https://github.com/golang/exp/blob/master/shiny/driver/internal/win32/win32.go#L168
lparam is used to get the coordinates of the mouse events. However depending on the buttons, lparam has different meanings: WM_MOUSEWHELL message: https://msdn.microsoft.com/en-us/library/windows/desktop/ms645616(v=vs.85).aspx lParam The low-order word specifies the x-coordinate of the pointer, relative to the upper-left corner of the screen. The high-order word specifies the y-coordinate of the pointer, relative to the upper-left corner of the screen. WM_MOUSEMOVE message: https://msdn.microsoft.com/en-us/library/windows/desktop/ms645616(v=vs.85).aspx lParam The low-order word specifies the x-coordinate of the cursor. The coordinate is relative to the upper-left corner of the client area. The high-order word specifies the y-coordinate of the cursor. The coordinate is relative to the upper-left corner of the client area. I'll file an issue. On Tue, Jan 17, 2017 at 10:38 PM, Dave MacFarlane <driu...@gmail.com> wrote: > That doesn't sound right to me. > > I just added a 'fmt.Printf("X: %v Y: %v\n", e.X, e.Y)' to the switch > case handling mouse.Event in one of my shiny programs, and the mouse > coordinates are reported relative to the top-left corner of the > window. > > On Sat, Jan 14, 2017 at 5:59 AM, <kty...@gmail.com> wrote: >> How do I get the position for a mouse.Event in shiny using >> golang.org/x/mobile/event.mouse? >> >> The position returned is the global position on the screen, which changes if >> I move the window. >> The comments in >> https://github.com/golang/mobile/blob/master/event/mouse/mouse.go#L18 say >> it's: >> "// X and Y are the mouse location, in pixels.". It doesn't mention if they >> are relative to the screen or the window. >> >> How do I get the position relative to the window? >> Or is it an error of the driver (I'm using windows)? >> Neither shiny.Screen nor shiny.Window have methods to get the current >> position of the window. >> >> Example: >> https://github.com/ktye/maps/blob/master/cmd/map/main.go#L101 >> >> -- >> You received this message because you are subscribed to the Google Groups >> "golang-nuts" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to golang-nuts+unsubscr...@googlegroups.com. >> For more options, visit https://groups.google.com/d/optout. > > > > -- > - Dave -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
