Joe Julian
74 lines
1.9 KiB
Go
74 lines
1.9 KiB
Go
package appui
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import (
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"image"
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"gioui.org/layout"
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"gioui.org/op"
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"gioui.org/unit"
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)
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type dropdownAnchor struct {
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TriggerRightX int
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TriggerBottomY int
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}
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func (a dropdownAnchor) point() image.Point {
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return image.Pt(a.TriggerRightX, a.TriggerBottomY)
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}
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type dropdownSurface struct {
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ContainerWidth int
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LeftInset int
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TopInset int
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}
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func (s dropdownSurface) menuConstraints(gtx layout.Context) layout.Context {
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menuGTX := gtx
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menuGTX.Constraints.Min = image.Point{}
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menuGTX.Constraints.Max.X = max(0, s.ContainerWidth)
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return menuGTX
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}
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func (s dropdownSurface) origin(anchor dropdownAnchor, menuWidth int) image.Point {
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x := s.LeftInset + anchoredMenuOriginX(s.ContainerWidth, 0, anchor.TriggerRightX, menuWidth)
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y := s.TopInset + anchor.TriggerBottomY
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return image.Pt(x, y)
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}
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func (s dropdownSurface) draw(gtx layout.Context, anchor dropdownAnchor, menu layout.Widget) layout.Dimensions {
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menuGTX := s.menuConstraints(gtx)
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menuOps := op.Record(gtx.Ops)
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menuDims := layout.Inset{Top: unit.Dp(6)}.Layout(menuGTX, menu)
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menuCall := menuOps.Stop()
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menuOrigin := s.origin(anchor, menuDims.Size.X)
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stack := op.Offset(menuOrigin).Push(gtx.Ops)
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menuCall.Add(gtx.Ops)
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stack.Pop()
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return layout.Dimensions{Size: gtx.Constraints.Max}
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}
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type headerActionMetrics struct {
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RowOriginX int
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Spacing int
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RowDims layout.Dimensions
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SyncDims layout.Dimensions
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LockDims layout.Dimensions
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MainDims layout.Dimensions
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}
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func (m headerActionMetrics) syncAnchor() dropdownAnchor {
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return dropdownAnchor{
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TriggerRightX: m.RowOriginX + m.SyncDims.Size.X,
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TriggerBottomY: m.RowDims.Size.Y,
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}
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}
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func (m headerActionMetrics) mainAnchor() dropdownAnchor {
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triggerRightX := m.SyncDims.Size.X + m.Spacing + m.LockDims.Size.X + m.Spacing + m.MainDims.Size.X
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return dropdownAnchor{
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TriggerRightX: m.RowOriginX + triggerRightX,
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TriggerBottomY: m.RowDims.Size.Y,
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}
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}
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