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refactor(tracker/gioui): separate SplitStyle from SplitState
This commit is contained in:
5684185+vsariola@users.noreply.github.com
parent
ba281ca7c0
commit
e59fbb50cf
@ -11,83 +11,29 @@ import (
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"gioui.org/unit"
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)
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type Split struct {
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// Ratio keeps the current layout.
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// 0 is center, -1 completely to the left, 1 completely to the right.
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Ratio float32
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// Bar is the width for resizing the layout
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Bar unit.Dp
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// Axis is the split direction: layout.Horizontal splits the view in left
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// and right, layout.Vertical splits the view in top and bottom
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Axis layout.Axis
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// Minimum sizes of the first and second widget in the split, in dp
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MinSize1, MinSize2 unit.Dp
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drag bool
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dragID pointer.ID
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dragCoord float32
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}
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var defaultBarWidth = unit.Dp(10)
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func (s *Split) Update(gtx layout.Context) {
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for {
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ev, ok := gtx.Event(pointer.Filter{
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Target: s,
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Kinds: pointer.Press | pointer.Drag | pointer.Release,
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// TODO: there should be a grab; there was Grab: s.drag,
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})
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if !ok {
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break
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}
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e, ok := ev.(pointer.Event)
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if !ok {
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continue
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}
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switch e.Kind {
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case pointer.Press:
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if s.drag {
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break
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}
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s.dragID = e.PointerID
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if s.Axis == layout.Horizontal {
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s.dragCoord = e.Position.X
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} else {
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s.dragCoord = e.Position.Y
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}
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s.drag = true
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// when the user start dragging, the new display ratio becomes the underlying ratio
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s.Ratio = s.calculateRatio(gtx)
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case pointer.Drag:
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if s.dragID != e.PointerID {
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break
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}
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if s.Axis == layout.Horizontal {
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s.Ratio += (e.Position.X - s.dragCoord) / float32(gtx.Constraints.Max.X) * 2
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s.dragCoord = e.Position.X
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} else {
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s.Ratio += (e.Position.Y - s.dragCoord) / float32(gtx.Constraints.Max.Y) * 2
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s.dragCoord = e.Position.Y
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}
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case pointer.Release, pointer.Cancel:
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if s.dragID == e.PointerID {
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// when the user release the grab, the new display ratio becomes the underlying ratio
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s.Ratio = s.calculateRatio(gtx)
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}
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s.drag = false
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}
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type (
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SplitState struct {
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// Ratio keeps the current layout.
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// 0 is center, -1 completely to the left, 1 completely to the right.
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Ratio float32
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// Axis is the split direction: layout.Horizontal splits the view in left
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// and right, layout.Vertical splits the view in top and bottom
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Axis layout.Axis
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drag bool
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dragID pointer.ID
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dragCoord float32
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}
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}
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func (s *Split) Layout(gtx layout.Context, first, second layout.Widget) layout.Dimensions {
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s.Update(gtx)
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SplitStyle struct {
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Bar unit.Dp
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MinSize1, MinSize2 unit.Dp
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}
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)
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size1, size2, bar := s.calculateSplitSizes(gtx)
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func (s *SplitState) Layout(gtx layout.Context, st *SplitStyle, first, second layout.Widget) layout.Dimensions {
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s.update(gtx, st)
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size1, size2, bar := s.calculateSplitSizes(gtx, st)
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secondOffset := size1 + bar
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{
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@ -142,8 +88,62 @@ func (s *Split) Layout(gtx layout.Context, first, second layout.Widget) layout.D
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return layout.Dimensions{Size: gtx.Constraints.Max}
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}
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func (s *Split) calculateRatio(gtx layout.Context) float32 {
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size1, size2, bar := s.calculateSplitSizes(gtx)
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func (s *SplitState) update(gtx layout.Context, st *SplitStyle) {
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for {
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ev, ok := gtx.Event(pointer.Filter{
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Target: s,
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Kinds: pointer.Press | pointer.Drag | pointer.Release,
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// TODO: there should be a grab; there was Grab: s.drag,
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})
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if !ok {
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break
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}
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e, ok := ev.(pointer.Event)
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if !ok {
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continue
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}
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switch e.Kind {
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case pointer.Press:
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if s.drag {
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break
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}
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s.dragID = e.PointerID
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if s.Axis == layout.Horizontal {
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s.dragCoord = e.Position.X
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} else {
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s.dragCoord = e.Position.Y
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}
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s.drag = true
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// when the user start dragging, the new display ratio becomes the underlying ratio
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s.Ratio = s.calculateRatio(gtx, st)
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case pointer.Drag:
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if s.dragID != e.PointerID {
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break
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}
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if s.Axis == layout.Horizontal {
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s.Ratio += (e.Position.X - s.dragCoord) / float32(gtx.Constraints.Max.X) * 2
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s.dragCoord = e.Position.X
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} else {
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s.Ratio += (e.Position.Y - s.dragCoord) / float32(gtx.Constraints.Max.Y) * 2
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s.dragCoord = e.Position.Y
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}
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case pointer.Release, pointer.Cancel:
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if s.dragID == e.PointerID {
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// when the user release the grab, the new display ratio becomes the underlying ratio
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s.Ratio = s.calculateRatio(gtx, st)
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}
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s.drag = false
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}
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}
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}
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func (s *SplitState) calculateRatio(gtx layout.Context, st *SplitStyle) float32 {
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size1, size2, bar := s.calculateSplitSizes(gtx, st)
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total := size1 + size2 + bar
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if total <= 0 {
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return 0
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@ -151,10 +151,10 @@ func (s *Split) calculateRatio(gtx layout.Context) float32 {
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return 2*float32(size1+bar/2)/float32(total) - 1
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}
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func (s *Split) calculateSplitSizes(gtx layout.Context) (size1, size2, bar int) {
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bar = gtx.Dp(s.Bar)
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func (s *SplitState) calculateSplitSizes(gtx layout.Context, st *SplitStyle) (size1, size2, bar int) {
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bar = gtx.Dp(st.Bar)
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if bar <= 1 {
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bar = gtx.Dp(defaultBarWidth)
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bar = gtx.Dp(1)
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}
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total := gtx.Constraints.Max.Y
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@ -169,8 +169,8 @@ func (s *Split) calculateSplitSizes(gtx layout.Context) (size1, size2, bar int)
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}
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totalSize := total - bar
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size1 = int((s.Ratio+1)/2*float32(total) - float32(bar)/2)
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minSize1 := gtx.Dp(s.MinSize1)
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minSize2 := gtx.Dp(s.MinSize2)
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minSize1 := gtx.Dp(st.MinSize1)
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minSize2 := gtx.Dp(st.MinSize2)
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// we always hide the smaller split first
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if s.Ratio < 0 {
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