mirror of
https://github.com/taigrr/wtf
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ed8d357881
Widgets that embed MultiSourceWidget no longer have to explicitly call loadSources(). This is done as part of the set-up for MultiSourceWidget.
99 lines
2.4 KiB
Go
99 lines
2.4 KiB
Go
package wtf
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import (
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"github.com/wtfutil/wtf/cfg"
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)
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type MultiSourceWidget struct {
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moduleConfig *cfg.Common
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singular string
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plural string
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DisplayFunction func()
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Idx int
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Sources []string
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}
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// NewMultiSourceWidget creates and returns an instance of MultiSourceWidget
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func NewMultiSourceWidget(moduleConfig *cfg.Common, singular, plural string) MultiSourceWidget {
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widget := MultiSourceWidget{
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moduleConfig: moduleConfig,
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singular: singular,
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plural: plural,
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}
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widget.loadSources()
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return widget
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}
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/* -------------------- Exported Functions -------------------- */
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// CurrentSource returns the string representations of the currently-displayed source
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func (widget *MultiSourceWidget) CurrentSource() string {
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if widget.Idx >= len(widget.Sources) {
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return ""
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}
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return widget.Sources[widget.Idx]
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}
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// Next displays the next source in the source list. If the current source is the last
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// source it wraps around to the first source
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func (widget *MultiSourceWidget) Next() {
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widget.Idx = widget.Idx + 1
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if widget.Idx == len(widget.Sources) {
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widget.Idx = 0
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}
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if widget.DisplayFunction != nil {
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widget.DisplayFunction()
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}
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}
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// Prev displays the previous source in the source list. If the current source is the first
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// source, it wraps around to the last source
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func (widget *MultiSourceWidget) Prev() {
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widget.Idx = widget.Idx - 1
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if widget.Idx < 0 {
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widget.Idx = len(widget.Sources) - 1
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}
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if widget.DisplayFunction != nil {
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widget.DisplayFunction()
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}
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}
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// SetDisplayFunction stores the function that should be called when the source is
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// changed. This is typically called from within the initializer for the struct that
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// embeds MultiSourceWidget
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//
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// Example:
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//
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// widget := Widget{
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// MultiSourceWidget: wtf.NewMultiSourceWidget(settings.common, "person", "people")
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// }
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//
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// widget.SetDisplayFunction(widget.display)
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//
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func (widget *MultiSourceWidget) SetDisplayFunction(displayFunc func()) {
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widget.DisplayFunction = displayFunc
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}
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/* -------------------- Unexported Functions -------------------- */
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func (widget *MultiSourceWidget) loadSources() {
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var empty []interface{}
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single := widget.moduleConfig.Config.UString(widget.singular, "")
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multiple := widget.moduleConfig.Config.UList(widget.plural, empty)
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asStrs := ToStrs(multiple)
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if single != "" {
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asStrs = append(asStrs, single)
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}
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widget.Sources = asStrs
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}
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