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Implement scrolling in message list

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This commit is contained in:
Drew DeVault 2019-03-15 21:49:40 -04:00
parent 01ae0cef60
commit 52a97c02ae
1 changed files with 14 additions and 3 deletions
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17
widgets/msglist.go
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@ -15,6 +15,7 @@ type MessageList struct {
logger *log.Logger
height int
onInvalidate func(d ui.Drawable)
scroll int
selected int
spinner *Spinner
store *lib.MessageStore
@ -59,7 +60,7 @@ func (ml *MessageList) Draw(ctx *ui.Context) {
row int = 0
)
for i := len(ml.store.Uids) - 1; i >= 0; i-- {
for i := len(ml.store.Uids) - 1 - ml.scroll; i >= 0; i-- {
uid := ml.store.Uids[i]
msg := ml.store.Messages[uid]
@ -75,7 +76,7 @@ func (ml *MessageList) Draw(ctx *ui.Context) {
}
style := tcell.StyleDefault
if row == ml.selected {
if row == ml.selected-ml.scroll {
style = style.Background(tcell.ColorWhite).
Foreground(tcell.ColorBlack)
}
@ -98,6 +99,10 @@ func (ml *MessageList) Height() int {
}
func (ml *MessageList) SetStore(store *lib.MessageStore) {
if ml.store == store {
ml.scroll = 0
ml.selected = 0
}
ml.store = store
if store != nil {
ml.spinner.Stop()
@ -115,7 +120,13 @@ func (ml *MessageList) nextPrev(delta int) {
if ml.selected >= len(ml.store.Uids) {
ml.selected = len(ml.store.Uids) - 1
}
// TODO: scrolling
if ml.Height() != 0 {
if ml.selected-ml.scroll >= ml.Height() {
ml.scroll += 1
} else if ml.selected-ml.scroll < 0 {
ml.scroll -= 1
}
}
ml.Invalidate()
}