diff options
Diffstat (limited to 'lib/ui/ui.go')
| -rw-r--r-- | lib/ui/ui.go | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/lib/ui/ui.go b/lib/ui/ui.go index 42d584f8..073684cc 100644 --- a/lib/ui/ui.go +++ b/lib/ui/ui.go @@ -6,6 +6,11 @@ import ( "github.com/gdamore/tcell/v2" ) +const ( + DIRTY int32 = iota + NOT_DIRTY +) + var MsgChannel = make(chan AercMsg, 50) // QueueRedraw sends a nil message into the MsgChannel. Nothing will handle this @@ -14,13 +19,23 @@ func QueueRedraw() { MsgChannel <- nil } +// dirty is the dirty state of the UI. Any value other than 0 means the UI is in +// a dirty state. Dirty should only be accessed via atomic operations to +// maintain thread safety +var dirty int32 + +// Invalidate marks the entire UI as invalid. Invalidate can be called from any +// goroutine +func Invalidate() { + atomic.StoreInt32(&dirty, DIRTY) +} + type UI struct { Content DrawableInteractive exit atomic.Value // bool ctx *Context screen tcell.Screen popover *Popover - invalid int32 // access via atomic } func Initialize(content DrawableInteractive) (*UI, error) { @@ -47,10 +62,7 @@ func Initialize(content DrawableInteractive) (*UI, error) { state.exit.Store(false) - state.invalid = 1 - content.OnInvalidate(func(_ Drawable) { - atomic.StoreInt32(&state.invalid, 1) - }) + Invalidate() if beeper, ok := content.(DrawableInteractiveBeeper); ok { beeper.OnBeep(screen.Beep) } @@ -80,8 +92,8 @@ func (state *UI) Close() { } func (state *UI) Render() { - wasInvalid := atomic.SwapInt32(&state.invalid, 0) - if wasInvalid != 0 { + dirtyState := atomic.SwapInt32(&dirty, NOT_DIRTY) + if dirtyState == DIRTY { // reset popover for the next Draw state.popover = nil state.Content.Draw(state.ctx) |