diff options
Diffstat (limited to 'area.go')
| -rw-r--r-- | area.go | 3 |
1 files changed, 2 insertions, 1 deletions
@@ -37,7 +37,7 @@ type Area struct { } // AreaHandler represents the events that an Area should respond to. -// You are responsible for the thread safety of any members of the actual type that implements ths interface. +// These methods are all executed on the main goroutine, not necessarily the same one that you created the AreaHandler in; you are responsible for the thread safety of any members of the actual type that implements ths interface. // (Having to use this interface does not strike me as being particularly Go-like, but the nature of Paint makes channel-based event handling a non-option; in practice, deadlocks occur.) type AreaHandler interface { // Paint is called when the Area needs to be redrawn. @@ -287,6 +287,7 @@ func NewArea(width int, height int, handler AreaHandler) *Area { // SetSize sets the Area's internal drawing size. // It has no effect on the actual control size. +// SetSize is safe for concurrent use; if the Area is being repainted or is handling an event, SetSize will wait for that to complete before changing the Area's size. // It panics if width or height is zero or negative. func (a *Area) SetSize(width int, height int) { a.lock.Lock() |