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-rw-r--r--lib/ui/list.go110
1 files changed, 0 insertions, 110 deletions
diff --git a/lib/ui/list.go b/lib/ui/list.go
deleted file mode 100644
index 58f304ff..00000000
--- a/lib/ui/list.go
+++ /dev/null
@@ -1,110 +0,0 @@
-package ui
-
-import (
- "fmt"
-)
-
-// A container which arranges its children in a list.
-type List struct {
- Items []*ListItem
- itemHeight int
- onInvalidate func(d Drawable)
- selected int
-}
-
-type ListItem struct {
- Content Drawable
- invalid bool
-}
-
-type SelectableDrawable interface {
- Drawable
- DrawWithSelected(ctx *Context, selected bool)
-}
-
-func NewList() *List {
- return &List{itemHeight: 1, selected: -1}
-}
-
-func (list *List) OnInvalidate(onInvalidate func(d Drawable)) {
- list.onInvalidate = onInvalidate
-}
-
-func (list *List) Invalidate() {
- for _, item := range list.Items {
- item.Content.Invalidate()
- }
- if list.onInvalidate != nil {
- list.onInvalidate(list)
- }
-}
-
-func (list *List) Draw(ctx *Context) {
- for i, item := range list.Items {
- if !item.invalid {
- continue
- }
- subctx := ctx.Subcontext(0, i, ctx.Width(), list.itemHeight)
- if content, ok := item.Content.(SelectableDrawable); ok {
- content.DrawWithSelected(subctx, i == list.selected)
- } else {
- item.Content.Draw(subctx)
- }
- }
-}
-
-func (list *List) Add(child Drawable) {
- list.Items = append(list.Items, &ListItem{Content: child, invalid: true})
- child.OnInvalidate(list.childInvalidated)
- list.Invalidate()
-}
-
-func (list *List) Remove(child Drawable) {
- for i, item := range list.Items {
- if item.Content == child {
- list.Items = append(list.Items[:i], list.Items[i+1:]...)
- child.OnInvalidate(nil)
- list.Invalidate()
- return
- }
- }
- panic(fmt.Errorf("Attempted to remove unknown child"))
-}
-
-func (list *List) Set(items []Drawable) {
- for _, item := range list.Items {
- item.Content.OnInvalidate(nil)
- }
- list.Items = make([]*ListItem, len(items))
- for i, item := range items {
- list.Items[i] = &ListItem{Content: item, invalid: true}
- item.OnInvalidate(list.childInvalidated)
- }
- list.Invalidate()
-}
-
-func (list *List) Select(index int) {
- if index >= len(list.Items) || index < 0 {
- panic(fmt.Errorf("Attempted to select unknown child"))
- }
- list.selected = index
- list.Invalidate()
-}
-
-func (list *List) ItemHeight(height int) {
- list.itemHeight = height
- list.Invalidate()
-}
-
-func (list *List) childInvalidated(child Drawable) {
- for _, item := range list.Items {
- if item.Content == child {
- item.invalid = true
- if list.onInvalidate != nil {
- list.onInvalidate(list)
- }
- return
- }
- }
- panic(fmt.Errorf("Attempted to invalidate unknown child"))
-}