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feat(tracker): implement simple undo / redo

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vsariola
2021-01-08 22:00:15 +02:00
parent b1df5bb4d5
commit eb25ddd864
3 changed files with 81 additions and 11 deletions
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33
tracker/keyevent.go
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@ -45,18 +45,17 @@ var noteMap = map[string]int{
// KeyEvent handles incoming key events and returns true if repaint is needed.
func (t *Tracker) KeyEvent(e key.Event) bool {
if e.State == key.Press {
if t.CursorColumn == 0 {
if val, ok := noteMap[e.Name]; ok {
t.NotePressed(val)
return true
}
} else {
if iv, err := strconv.ParseInt(e.Name, 16, 8); err == nil {
t.NumberPressed(byte(iv))
return true
}
}
switch e.Name {
case "Z":
if e.Modifiers.Contain(key.ModCtrl) {
t.Undo()
return true
}
case "Y":
if e.Modifiers.Contain(key.ModCtrl) {
t.Redo()
return true
}
case "A":
t.setCurrent(0)
return true
@ -114,6 +113,17 @@ func (t *Tracker) KeyEvent(e key.Event) bool {
t.CursorColumn = 0
return true
}
if t.CursorColumn == 0 {
if val, ok := noteMap[e.Name]; ok {
t.NotePressed(val)
return true
}
} else {
if iv, err := strconv.ParseInt(e.Name, 16, 8); err == nil {
t.NumberPressed(byte(iv))
return true
}
}
}
return false
}
@ -135,6 +145,7 @@ func (t *Tracker) moveCursor(delta int) {
// setCurrent sets the (note) value in current pattern under cursor to iv
func (t *Tracker) setCurrent(iv byte) {
t.SaveUndo()
t.song.Tracks[t.ActiveTrack].Patterns[t.song.Tracks[t.ActiveTrack].Sequence[t.DisplayPattern]][t.CursorRow] = iv
}