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// Copyright 2017 The Walk Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build windows
package walk
type IntRangeEventHandler func(from, to int)
type IntRangeEvent struct {
handlers []IntRangeEventHandler
}
func (e *IntRangeEvent) Attach(handler IntRangeEventHandler) int {
for i, h := range e.handlers {
if h == nil {
e.handlers[i] = handler
return i
}
}
e.handlers = append(e.handlers, handler)
return len(e.handlers) - 1
}
func (e *IntRangeEvent) Detach(handle int) {
e.handlers[handle] = nil
}
type IntRangeEventPublisher struct {
event IntRangeEvent
}
func (p *IntRangeEventPublisher) Event() *IntRangeEvent {
return &p.event
}
func (p *IntRangeEventPublisher) Publish(from, to int) {
for _, handler := range p.event.handlers {
if handler != nil {
handler(from, to)
}
}
}
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