diff options
Diffstat (limited to 'button.go')
| -rw-r--r-- | button.go | 24 |
1 files changed, 21 insertions, 3 deletions
@@ -2,8 +2,18 @@ package ui +import ( + "sync" +) + // A Button represents a clickable button with some text. type Button struct { + // Clicked gets a message when the button is clicked. + // You cannot change it once the Window containing the Button has been created. + // If you do not respond to this signal, nothing will happen. + Clicked chan struct{} + + lock sync.Mutex created bool sysData *sysData initText string @@ -14,11 +24,15 @@ func NewButton(text string) (b *Button) { return &Button{ sysData: mksysdata(c_button), initText: text, + Clicked: newEvent(), } } // SetText sets the button's text. func (b *Button) SetText(text string) { + b.lock.Lock() + defer b.lock.Unlock() + if b.created { b.sysData.setText(text) return @@ -28,6 +42,9 @@ func (b *Button) SetText(text string) { // Text returns the button's text. func (b *Button) Text() string { + b.lock.Lock() + defer b.lock.Unlock() + if b.created { return b.sysData.text() } @@ -35,9 +52,10 @@ func (b *Button) Text() string { } func (b *Button) make(window *sysData) error { - b.sysData.event = func() { - window.winhandler.Event(Clicked, b) - } + b.lock.Lock() + defer b.lock.Unlock() + + b.sysData.event = b.Clicked err := b.sysData.make(window) if err != nil { return err |