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-rw-r--r--ui/grid.go191
1 files changed, 0 insertions, 191 deletions
diff --git a/ui/grid.go b/ui/grid.go
deleted file mode 100644
index ede7d0ca..00000000
--- a/ui/grid.go
+++ /dev/null
@@ -1,191 +0,0 @@
-package ui
-
-import (
- "fmt"
- "math"
-)
-
-type Grid struct {
- rows []GridSpec
- rowLayout []gridLayout
- columns []GridSpec
- columnLayout []gridLayout
- Cells []*GridCell
- onInvalidate func(d Drawable)
- invalid bool
-}
-
-const (
- SIZE_EXACT = iota
- SIZE_WEIGHT = iota
-)
-
-// Specifies the layout of a single row or column
-type GridSpec struct {
- // One of SIZE_EXACT or SIZE_WEIGHT
- Strategy int
- // If Strategy = SIZE_EXACT, this is the number of cells this row/col shall
- // occupy. If SIZE_WEIGHT, the space left after all exact rows/cols are
- // measured is distributed amonst the remainder weighted by this value.
- Size int
-}
-
-// Used to cache layout of each row/column
-type gridLayout struct {
- Offset int
- Size int
-}
-
-type GridCell struct {
- Row int
- Column int
- RowSpan int
- ColSpan int
- Content Drawable
- invalid bool
-}
-
-func NewGrid() *Grid {
- return &Grid{invalid: true}
-}
-
-func (cell *GridCell) At(row, col int) *GridCell {
- cell.Row = row
- cell.Column = col
- return cell
-}
-
-func (cell *GridCell) Span(rows, cols int) *GridCell {
- cell.RowSpan = rows
- cell.ColSpan = cols
- return cell
-}
-
-func (grid *Grid) Rows(spec []GridSpec) *Grid {
- grid.rows = spec
- return grid
-}
-
-func (grid *Grid) Columns(spec []GridSpec) *Grid {
- grid.columns = spec
- return grid
-}
-
-func (grid *Grid) Draw(ctx *Context) {
- invalid := grid.invalid
- if invalid {
- grid.reflow(ctx)
- }
- for _, cell := range grid.Cells {
- if !cell.invalid && !invalid {
- continue
- }
- rows := grid.rowLayout[cell.Row : cell.Row+cell.RowSpan]
- cols := grid.columnLayout[cell.Column : cell.Column+cell.ColSpan]
- x := cols[0].Offset
- y := rows[0].Offset
- width := 0
- height := 0
- for _, col := range cols {
- width += col.Size
- }
- for _, row := range rows {
- height += row.Size
- }
- subctx := ctx.Subcontext(x, y, width, height)
- cell.Content.Draw(subctx)
- }
-}
-
-func (grid *Grid) reflow(ctx *Context) {
- grid.rowLayout = nil
- grid.columnLayout = nil
- flow := func(specs *[]GridSpec, layouts *[]gridLayout, extent int) {
- exact := 0
- weight := 0
- nweights := 0
- for _, spec := range *specs {
- if spec.Strategy == SIZE_EXACT {
- exact += spec.Size
- } else if spec.Strategy == SIZE_WEIGHT {
- nweights += 1
- weight += spec.Size
- }
- }
- offset := 0
- for _, spec := range *specs {
- layout := gridLayout{Offset: offset}
- if spec.Strategy == SIZE_EXACT {
- layout.Size = spec.Size
- } else if spec.Strategy == SIZE_WEIGHT {
- size := float64(spec.Size) / float64(weight)
- size *= float64(extent - exact)
- layout.Size = int(math.Floor(size))
- }
- offset += layout.Size
- *layouts = append(*layouts, layout)
- }
- }
- flow(&grid.rows, &grid.rowLayout, ctx.Height())
- flow(&grid.columns, &grid.columnLayout, ctx.Width())
- grid.invalid = false
-}
-
-func (grid *Grid) invalidateLayout() {
- grid.invalid = true
- if grid.onInvalidate != nil {
- grid.onInvalidate(grid)
- }
-}
-
-func (grid *Grid) Invalidate() {
- grid.invalidateLayout()
- for _, cell := range grid.Cells {
- cell.Content.Invalidate()
- }
-}
-
-func (grid *Grid) OnInvalidate(onInvalidate func(d Drawable)) {
- grid.onInvalidate = onInvalidate
-}
-
-func (grid *Grid) AddChild(content Drawable) *GridCell {
- cell := &GridCell{
- RowSpan: 1,
- ColSpan: 1,
- Content: content,
- invalid: true,
- }
- grid.Cells = append(grid.Cells, cell)
- cell.Content.OnInvalidate(grid.cellInvalidated)
- cell.invalid = true
- grid.invalidateLayout()
- return cell
-}
-
-func (grid *Grid) RemoveChild(cell *GridCell) {
- for i, _cell := range grid.Cells {
- if _cell == cell {
- grid.Cells = append(grid.Cells[:i], grid.Cells[i+1:]...)
- break
- }
- }
- grid.invalidateLayout()
-}
-
-func (grid *Grid) cellInvalidated(drawable Drawable) {
- var cell *GridCell
- for _, cell = range grid.Cells {
- if cell.Content == drawable {
- break
- }
- cell = nil
- }
- if cell == nil {
- panic(fmt.Errorf("Attempted to invalidate unknown cell"))
- }
- cell.invalid = true
- if grid.onInvalidate != nil {
- grid.onInvalidate(grid)
- }
-}