67 lines
1.9 KiB
Go
67 lines
1.9 KiB
Go
package overlay
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import (
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"log/slog"
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"github.com/egoist/mygo/ui"
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"git.zacharyzhang.com/ZacharyZhang-NY/MujicaUI/core"
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"git.zacharyzhang.com/ZacharyZhang-NY/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 below anchor, or above it, inside the window while *open is true.
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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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core.OverlayLayer(c, open)
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u := core.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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core.OverlayStyle(c, panel, OverlayAnchored(c, panel, b))
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panel.Margin(6, 0, 0, 0).Padding(u * 3).Gap(u * 2).MinWidth(PopoverWide(c, b.W)).MaxHeight(PopoverRoom(c, b)).Label(label)
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if opts.Width > 0 {
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panel.Width(PopoverWide(c, opts.Width))
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} else {
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panel.MaxWidth(PopoverWide(c, 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(core.FontSize(c, 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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// PopoverWide caps a panel width w to the window.
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func PopoverWide(c *ui.Context, w float32) float32 {
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ww, _ := c.Size()
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return min(w, ww-8)
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}
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