forked from ungerik/go-start
/
select.go
134 lines (107 loc) · 3.36 KB
/
select.go
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package view
import "github.com/ungerik/go-start/utils"
///////////////////////////////////////////////////////////////////////////////
// Select
type Select struct {
ViewBaseWithId
Model SelectModel
Name string
Size int // 0 shows all items, 1 shows a dropdownbox, other values show size items
Class string
Disabled bool
}
func (self *Select) IterateChildren(callback IterateChildrenCallback) {
self.Model.IterateChildren(self, callback)
}
func (self *Select) Render(context *Context, writer *utils.XMLWriter) (err error) {
writer.OpenTag("select").Attrib("id", self.id).AttribIfNotDefault("class", self.Class)
writer.Attrib("name", self.Name)
if self.Disabled {
writer.Attrib("disabled", "disabled")
}
size := self.Size
if self.Model != nil {
numOptions := self.Model.NumOptions()
if size == 0 {
size = numOptions
}
writer.Attrib("size", size)
for i := 0; i < numOptions; i++ {
writer.OpenTag("option")
writer.AttribIfNotDefault("value", self.Model.Value(i))
if self.Model.Selected(i) {
writer.Attrib("selected", "selected")
}
if self.Model.Disabled(i) {
writer.Attrib("disabled", "disabled")
}
err = self.Model.RenderItem(i, context, writer)
if err != nil {
return err
}
writer.CloseTag() // option
}
} else {
writer.Attrib("size", size)
}
writer.CloseTag() // select
return nil
}
///////////////////////////////////////////////////////////////////////////////
// Model
type SelectModel interface {
NumOptions() int
Value(index int) string
Selected(index int) bool
Disabled(index int) bool
RenderItem(index int, context *Context, writer *utils.XMLWriter) (err error)
IterateChildren(parent *Select, callback func(parent View, child View) (next bool))
}
///////////////////////////////////////////////////////////////////////////////
// StringsSelectModel
type StringsSelectModel struct {
Options []string
SelectedOption string
}
func (self *StringsSelectModel) NumOptions() int {
return len(self.Options)
}
func (self *StringsSelectModel) Value(index int) string {
return self.Options[index]
}
func (self *StringsSelectModel) Selected(index int) bool {
return self.Options[index] == self.SelectedOption
}
func (self *StringsSelectModel) Disabled(index int) bool {
return false
}
func (self *StringsSelectModel) RenderItem(index int, context *Context, writer *utils.XMLWriter) (err error) {
writer.Content(self.Options[index])
return nil
}
func (self *StringsSelectModel) IterateChildren(parent *Select, callback func(parent View, child View) (next bool)) {
}
///////////////////////////////////////////////////////////////////////////////
// IndexedStringsSelectModel
type IndexedStringsSelectModel struct {
Options []string
Index int
}
func (self *IndexedStringsSelectModel) NumOptions() int {
return len(self.Options)
}
func (self *IndexedStringsSelectModel) Value(index int) string {
return self.Options[index]
}
func (self *IndexedStringsSelectModel) Selected(index int) bool {
return index == self.Index
}
func (self *IndexedStringsSelectModel) Disabled(index int) bool {
return false
}
func (self *IndexedStringsSelectModel) RenderItem(index int, context *Context, writer *utils.XMLWriter) (err error) {
writer.Content(self.Options[index])
return nil
}
func (self *IndexedStringsSelectModel) IterateChildren(parent *Select, callback func(parent View, child View) (next bool)) {
}