46 lines
785 B
Go
46 lines
785 B
Go
// Copyright 2011 The Walk Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build windows
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package lib
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type EventHandler func()
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type Event struct {
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handlers []EventHandler
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}
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func (e *Event) Attach(handler EventHandler) int {
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for i, h := range e.handlers {
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if h == nil {
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e.handlers[i] = handler
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return i
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}
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}
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e.handlers = append(e.handlers, handler)
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return len(e.handlers) - 1
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}
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func (e *Event) Detach(handle int) {
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e.handlers[handle] = nil
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}
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type EventPublisher struct {
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event Event
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}
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func (p *EventPublisher) Event() *Event {
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return &p.event
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}
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func (p *EventPublisher) Publish() {
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for _, handler := range p.event.handlers {
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if handler != nil {
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handler()
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}
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}
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}
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