Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
tree: 06c8b6c89a
Fetching contributors…

Cannot retrieve contributors at this time

113 lines (87 sloc) 2.248 kb
// Copyright 2010 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.
package walk
type actionListObserver interface {
onInsertingAction(index int, action *Action) error
onRemovingAction(index int, action *Action) error
onClearingActions() error
}
type ActionList struct {
actions []*Action
observer actionListObserver
}
func newActionList(observer actionListObserver) *ActionList {
return &ActionList{observer: observer}
}
func (l *ActionList) Add(action *Action) error {
return l.Insert(len(l.actions), action)
}
func (l *ActionList) AddMenu(menu *Menu) (*Action, error) {
return l.InsertMenu(len(l.actions), menu)
}
func (l *ActionList) At(index int) *Action {
return l.actions[index]
}
func (l *ActionList) Clear() error {
observer := l.observer
if observer != nil {
if err := observer.onClearingActions(); err != nil {
return err
}
}
l.actions = l.actions[:0]
return nil
}
func (l *ActionList) Contains(action *Action) bool {
return l.Index(action) > -1
}
func (l *ActionList) Index(action *Action) int {
for i, a := range l.actions {
if a == action {
return i
}
}
return -1
}
func (l *ActionList) Insert(index int, action *Action) error {
observer := l.observer
if observer != nil {
if err := observer.onInsertingAction(index, action); err != nil {
return err
}
}
l.actions = append(l.actions, nil)
copy(l.actions[index+1:], l.actions[index:])
l.actions[index] = action
return nil
}
func (l *ActionList) InsertMenu(index int, menu *Menu) (*Action, error) {
action := NewAction()
action.menu = menu
if err := l.Insert(index, action); err != nil {
return nil, err
}
return action, nil
}
func (l *ActionList) Len() int {
return len(l.actions)
}
func (l *ActionList) Remove(action *Action) error {
index := l.Index(action)
if index == -1 {
return nil
}
return l.RemoveAt(index)
}
func (l *ActionList) RemoveAt(index int) error {
observer := l.observer
if observer != nil {
action := l.actions[index]
if err := observer.onRemovingAction(index, action); err != nil {
return err
}
}
l.actions = append(l.actions[:index], l.actions[index+1:]...)
return nil
}
Jump to Line
Something went wrong with that request. Please try again.