61 lines
1.6 KiB
Go
61 lines
1.6 KiB
Go
package mujica
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import (
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"log/slog"
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"github.com/egoist/mygo/ui"
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"mujicaui/theme"
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)
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// PopoverOptions configure a Popover.
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type PopoverOptions struct {
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// Title shows in serif at the top and names the panel.
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Title string
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// Width fixes the panel width; zero fits the content, at least the anchor's width.
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Width float32
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// Label names an untitled panel for assistive technology.
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Label string
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}
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// Popover shows content in a panel below anchor while *open is true. The
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// panel flips above where there is no room, stays in the window and scrolls
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// when taller than the room; an outside click or Escape closes it.
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func Popover(c *ui.Context, anchor *ui.Element, open *bool, opts PopoverOptions, content func()) *ui.Element {
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if anchor == nil {
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panic("mujica: Popover needs an anchor")
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}
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if !*open {
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return nil
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}
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u := Density(c).Unit()
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b := anchor.Bounds()
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label := opts.Label
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if opts.Title != "" {
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label = opts.Title
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}
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panel := ui.PopoverBase(c, anchor, open, func(panel *ui.Element) {
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overlayStyle(c, panel, overlayAnchored(c, panel, b))
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panel.Margin(6, 0, 0, 0).Padding(u * 3).Gap(u * 2).MinWidth(b.W).MaxHeight(popoverRoom(c, b)).Label(label)
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if opts.Width > 0 {
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panel.Width(opts.Width)
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} else {
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panel.MaxWidth(360)
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}
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if opts.Title != "" {
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ui.Text(c, opts.Title).Font(theme.SerifFont).FontSize(theme.BodySize + 2).FontWeight(600).Shrink(0)
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}
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ui.Scroll(c).Shrink(1).Children(content)
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})
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if !*open {
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slog.Debug("mujica: popover close")
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}
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return panel
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}
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// popoverRoom is the tallest a panel below or above anchor b may be.
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func popoverRoom(c *ui.Context, b ui.Rect) float32 {
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_, h := c.Size()
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return max(b.Y, h-b.Y-b.H) - 16
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}
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