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fix(tracker/gioui): scroll bars move in sync with the cursor

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This commit is contained in:
5684185+vsariola@users.noreply.github.com 2023-10-19 14:25:03 +03:00
parent b772940b1f
commit 9073adadb3
2 changed files with 6 additions and 2 deletions
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1
CHANGELOG.md
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@ -18,6 +18,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
options options
### Fixed ### Fixed
- The scroll bars move in sync with the cursor.
- The stereo version of delay in the go virtual machine (executables / plugins - The stereo version of delay in the go virtual machine (executables / plugins
not ending with -native) applied the left delay taps on the right channel, and not ending with -native) applied the left delay taps on the right channel, and
the right delay taps on the left channel. the right delay taps on the left channel.

7
tracker/gioui/scrollbar.go
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@ -50,6 +50,9 @@ func (s *ScrollBar) Layout(gtx C, width unit.Dp, numItems int, pos *layout.Posit
totalPixelsEstimate = float32(gtx.Constraints.Min.X+pos.Offset-pos.OffsetLast) * float32(numItems) / float32(pos.Count) totalPixelsEstimate = float32(gtx.Constraints.Min.X+pos.Offset-pos.OffsetLast) * float32(numItems) / float32(pos.Count)
scrollBarRelLength = float32(gtx.Constraints.Min.X) / float32(totalPixelsEstimate) scrollBarRelLength = float32(gtx.Constraints.Min.X) / float32(totalPixelsEstimate)
} }
if scrollBarRelLength < 1e-2 {
scrollBarRelLength = 1e-2 // make sure it doesn't disappear completely
}
scrollBarRelStart := (float32(pos.First)*totalPixelsEstimate/float32(numItems) + float32(pos.Offset)) / totalPixelsEstimate scrollBarRelStart := (float32(pos.First)*totalPixelsEstimate/float32(numItems) + float32(pos.Offset)) / totalPixelsEstimate
scrWidth := gtx.Dp(width) scrWidth := gtx.Dp(width)
@ -97,10 +100,10 @@ func (s *ScrollBar) Layout(gtx C, width unit.Dp, numItems int, pos *layout.Posit
} }
case pointer.Drag: case pointer.Drag:
if s.Axis == layout.Horizontal { if s.Axis == layout.Horizontal {
pos.Offset += int(e.Position.X - s.dragStart + 0.5) pos.Offset += int((e.Position.X-s.dragStart)/scrollBarRelLength + 0.5)
s.dragStart = e.Position.X s.dragStart = e.Position.X
} else { } else {
pos.Offset += int(e.Position.Y - s.dragStart + 0.5) pos.Offset += int((e.Position.Y-s.dragStart)/scrollBarRelLength + 0.5)
s.dragStart = e.Position.Y s.dragStart = e.Position.Y
} }
case pointer.Release, pointer.Cancel: case pointer.Release, pointer.Cancel: