mirror of https://github.com/anoshenko/rui.git
103 lines
3.3 KiB
Go
103 lines
3.3 KiB
Go
package rui
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// ScrollEvent is the constant for "scroll-event" property tag.
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//
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// Used by View.
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// Is fired when the content of the view is scrolled.
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//
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// General listener format:
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//
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// func(view rui.View, frame rui.Frame)
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//
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// where:
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// - view - Interface of a view which generated this event,
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// - frame - New offset and size of the view's visible area.
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//
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// Allowed listener formats:
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//
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// func(frame rui.Frame)
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// func(view rui.View)
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// func()
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const ScrollEvent PropertyName = "scroll-event"
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func (view *viewData) onScroll(self View, x, y, width, height float64) {
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view.scroll.Left = x
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view.scroll.Top = y
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view.scroll.Width = width
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view.scroll.Height = height
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for _, listener := range getOneArgEventListeners[View, Frame](view, nil, ScrollEvent) {
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listener.Run(self, view.scroll)
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}
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}
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func (view *viewData) Scroll() Frame {
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return view.scroll
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}
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func (view *viewData) setScroll(x, y, width, height float64) {
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view.scroll.Left = x
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view.scroll.Top = y
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view.scroll.Width = width
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view.scroll.Height = height
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}
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// GetViewScroll returns ...
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//
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// The second argument (subviewID) specifies the path to the child element whose value needs to be returned.
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// If it is not specified then a value from the first argument (view) is returned.
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func GetViewScroll(view View, subviewID ...string) Frame {
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view = getSubview(view, subviewID)
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if view == nil {
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return Frame{}
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}
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return view.Scroll()
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}
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// GetScrollListeners returns the list of "scroll-event" listeners. If there are no listeners then the empty list is returned
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//
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// Result elements can be of the following types:
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// - func(rui.View, rui.Frame),
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// - func(rui.View),
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// - func(rui.Frame),
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// - func(),
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// - string.
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//
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// The second argument (subviewID) specifies the path to the child element whose value needs to be returned.
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// If it is not specified then a value from the first argument (view) is returned.
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func GetScrollListeners(view View, subviewID ...string) []any {
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return getOneArgEventRawListeners[View, Frame](view, subviewID, ScrollEvent)
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}
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// ScrollTo scrolls the view's content to the given position.
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//
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// The second argument (subviewID) specifies the path to the child element whose value needs to be returned.
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// If it is not specified then a value from the first argument (view) is returned.
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func ScrollViewTo(view View, subviewID string, x, y float64) {
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if subviewID != "" {
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view = ViewByID(view, subviewID)
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}
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if view != nil {
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view.Session().callFunc("scrollTo", view.htmlID(), x, y)
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}
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}
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// ScrollViewToEnd scrolls the view's content to the start of view.
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//
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// The second argument (subviewID) specifies the path to the child element whose value needs to be returned.
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// If it is not specified then a value from the first argument (view) is returned.
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func ScrollViewToStart(view View, subviewID ...string) {
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if view = getSubview(view, subviewID); view != nil {
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view.Session().callFunc("scrollToStart", view.htmlID())
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}
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}
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// ScrollViewToEnd scrolls the view's content to the end of view.
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//
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// The second argument (subviewID) specifies the path to the child element whose value needs to be returned.
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// If it is not specified then a value from the first argument (view) is returned.
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func ScrollViewToEnd(view View, subviewID ...string) {
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if view = getSubview(view, subviewID); view != nil {
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view.Session().callFunc("scrollToEnd", view.htmlID())
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}
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}
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