55 lines
1.6 KiB
Go
55 lines
1.6 KiB
Go
package mujica
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import (
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"fmt"
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"github.com/egoist/mygo/ui"
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"mujicaui/theme"
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)
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// OpenResult is a list's element and the 1-based item the user opened this frame.
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type OpenResult struct {
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Element *ui.Element
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opened int
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}
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// Opened returns the number of the source opened.
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func (r OpenResult) Opened() (int, bool) { return r.opened, r.opened > 0 }
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// SourcesPanel lists sources in citation order, numbered from 1; the Active one scrolls into view.
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// It grows to fill its container, which needs a height.
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func SourcesPanel(c *ui.Context, sources []Source, st *CitationState) OpenResult {
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if st == nil || st.Active < 0 || st.Active > len(sources) {
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panic("mujica: SourcesPanel needs a state whose Active is 0 or a listed source")
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}
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k := Tokens(c)
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u := Density(c).Unit()
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var r OpenResult
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r.Element = ui.Column(c).Gap(u * 2).Grow(1).MinHeight(0).Role(ui.RoleList).Label(msg(c, "sources_panel.label"))
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shown := ui.Local(r.Element, "active", func() int { return 0 })
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r.Element.Children(func() {
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ui.Text(c, fmt.Sprintf("%s (%d)", msg(c, "sources_panel.label"), len(sources))).Font(theme.SerifFont).
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FontSize(FontSize(c, theme.H3Size)).FontWeight(600)
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if len(sources) == 0 {
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ui.Text(c, msg(c, "sources_panel.empty")).TextColor(k.TextMuted)
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return
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}
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ui.Scroll(c).Grow(1).MinHeight(0).Children(func() {
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ui.Column(c).Gap(u * 2).Children(func() {
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for i, src := range sources {
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card := SourceCard(c, i+1, src, st).Role(ui.RoleListItem)
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if card.Clicked() && !card.IsDisabled() {
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r.opened = i + 1
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}
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if st.Active == i+1 && *shown != st.Active {
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card.ScrollIntoView()
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}
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}
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})
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})
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})
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*shown = st.Active
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return r
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}
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