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rui/listLayout.go

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package rui
import (
"strings"
)
const (
// TopDownOrientation - subviews are arranged from top to bottom. Synonym of VerticalOrientation
TopDownOrientation = 0
// StartToEndOrientation - subviews are arranged from left to right. Synonym of HorizontalOrientation
StartToEndOrientation = 1
// BottomUpOrientation - subviews are arranged from bottom to top
BottomUpOrientation = 2
// EndToStartOrientation - subviews are arranged from right to left
EndToStartOrientation = 3
// ListWrapOff - subviews are scrolled and "true" if a new row/column starts
ListWrapOff = 0
// ListWrapOn - the new row/column starts at bottom/right
ListWrapOn = 1
// ListWrapReverse - the new row/column starts at top/left
ListWrapReverse = 2
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)
// ListLayout - list-container of View
type ListLayout interface {
ViewsContainer
}
type listLayoutData struct {
viewsContainerData
}
// NewListLayout create new ListLayout object and return it
func NewListLayout(session Session, params Params) ListLayout {
view := new(listLayoutData)
view.Init(session)
setInitParams(view, params)
return view
}
func newListLayout(session Session) View {
return NewListLayout(session, nil)
}
// Init initialize fields of ViewsAlignContainer by default values
func (listLayout *listLayoutData) Init(session Session) {
listLayout.viewsContainerData.Init(session)
listLayout.tag = "ListLayout"
listLayout.systemClass = "ruiListLayout"
}
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func (listLayout *listLayoutData) String() string {
return getViewString(listLayout)
}
func (listLayout *listLayoutData) normalizeTag(tag string) string {
tag = strings.ToLower(tag)
switch tag {
case "wrap":
tag = ListWrap
}
return tag
}
func (listLayout *listLayoutData) Get(tag string) interface{} {
return listLayout.get(listLayout.normalizeTag(tag))
}
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func (listLayout *listLayoutData) Remove(tag string) {
listLayout.remove(listLayout.normalizeTag(tag))
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}
func (listLayout *listLayoutData) remove(tag string) {
listLayout.viewsContainerData.remove(tag)
if listLayout.created {
switch tag {
case Orientation, ListWrap, HorizontalAlign, VerticalAlign:
updateCSSStyle(listLayout.htmlID(), listLayout.session)
}
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}
}
func (listLayout *listLayoutData) Set(tag string, value interface{}) bool {
return listLayout.set(listLayout.normalizeTag(tag), value)
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}
func (listLayout *listLayoutData) set(tag string, value interface{}) bool {
if value == nil {
listLayout.remove(tag)
return true
}
if listLayout.viewsContainerData.set(tag, value) {
if listLayout.created {
switch tag {
case Orientation, ListWrap, HorizontalAlign, VerticalAlign:
updateCSSStyle(listLayout.htmlID(), listLayout.session)
}
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}
return true
}
return false
}
func (listLayout *listLayoutData) htmlSubviews(self View, buffer *strings.Builder) {
if listLayout.views != nil {
for _, view := range listLayout.views {
view.addToCSSStyle(map[string]string{`flex`: `0 0 auto`})
viewHTML(view, buffer)
}
}
}
// GetListVerticalAlign returns the vertical align of a ListLayout or ListView sibview:
// TopAlign (0), BottomAlign (1), CenterAlign (2), or StretchAlign (3)
// If the second argument (subviewID) is "" then a value from the first argument (view) is returned.
func GetListVerticalAlign(view View, subviewID string) int {
if subviewID != "" {
view = ViewByID(view, subviewID)
}
if view == nil {
return LeftAlign
}
result, _ := enumProperty(view, VerticalAlign, view.Session(), 0)
return result
}
// GetListHorizontalAlign returns the vertical align of a ListLayout or ListView subview:
// LeftAlign (0), RightAlign (1), CenterAlign (2), or StretchAlign (3)
// If the second argument (subviewID) is "" then a value from the first argument (view) is returned.
func GetListHorizontalAlign(view View, subviewID string) int {
if subviewID != "" {
view = ViewByID(view, subviewID)
}
if view == nil {
return TopAlign
}
result, _ := enumProperty(view, HorizontalAlign, view.Session(), 0)
return result
}
// GetListOrientation returns the orientation of a ListLayout or ListView subview:
// TopDownOrientation (0), StartToEndOrientation (1), BottomUpOrientation (2), or EndToStartOrientation (3)
// If the second argument (subviewID) is "" then a value from the first argument (view) is returned.
func GetListOrientation(view View, subviewID string) int {
if subviewID != "" {
view = ViewByID(view, subviewID)
}
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if view != nil {
if orientation, ok := valueToOrientation(view.Get(Orientation), view.Session()); ok {
return orientation
}
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if value := valueFromStyle(view, Orientation); value != nil {
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if orientation, ok := valueToOrientation(value, view.Session()); ok {
return orientation
}
}
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}
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return 0
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}
// GetListWrap returns the wrap type of a ListLayout or ListView subview:
// WrapOff (0), WrapOn (1), or WrapReverse (2)
// If the second argument (subviewID) is "" then a value from the first argument (view) is returned.
func GetListWrap(view View, subviewID string) int {
if subviewID != "" {
view = ViewByID(view, subviewID)
}
if view != nil {
if result, ok := enumStyledProperty(view, ListWrap, 0); ok {
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return result
}
}
return ListWrapOff
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}