78 lines
2.2 KiB
Go
78 lines
2.2 KiB
Go
package input
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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/8bitMyGoUI/pixel"
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)
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type TextInputOptions struct {
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Placeholder string
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MaxLength int
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// Width is in dots; zero means 120.
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Width int
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Disabled bool
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}
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type TextInputResult struct {
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// Element is laid out; Input takes the focus.
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Element, Input *ui.Element
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Changed, Submitted, Focused bool
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}
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// TextInput is a one-line pixel field; Enter reports Submitted.
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func TextInput(c *ui.Context, label string, value *string, o TextInputOptions) TextInputResult {
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ed, e := field(c, value, pixel.EditorOptions{Label: label, Placeholder: o.Placeholder, MaxLength: o.MaxLength, Disabled: o.Disabled}, o.Width, nil, nil, nil)
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return result(e, ed, label)
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}
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// field frames an editor in a well with extras.
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func field(c *ui.Context, value *string, eo pixel.EditorOptions, width int, bad func() bool, icon *pixel.Sprite, after func()) (pixel.Edit, *ui.Element) {
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k := pixel.K(c)
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var ed pixel.Edit
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e := ui.Row(c).Width(k.D(orDef("Width", width, 120))).Height(k.D(pixel.LineHeight+6)).Padding(0, k.D(4)).Gap(k.D(3)).AlignItems(ui.Center)
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e.Children(func() {
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if icon != nil {
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ui.Box(c).Size(k.D(icon.W), k.D(icon.H)).Draw(func(p *ui.Painter, r ui.Rect) {
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k.Canvas(p, r).Sprite(0, 0, icon, 0, pixel.Faint, 1)
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})
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}
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ed = pixel.Editor(c, value, eo)
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ed.Element.Grow(1)
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if after != nil {
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after()
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}
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})
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focus := ed.Focused
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e.Draw(func(p *ui.Painter, r ui.Rect) {
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edge := pixel.Edge
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if bad != nil && bad() {
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edge = pixel.Bad
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}
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well(k.Canvas(p, r), edge, focus)
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})
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return ed, e
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}
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// well is a field's sunken box; focus dots its foot.
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func well(g pixel.Canvas, edge pixel.Slot, focus bool) {
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g.Frame(0, 0, g.W, g.H, pixel.Sunken, pixel.Well)
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g.HLine(1, 0, g.W-2, edge)
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g.HLine(1, g.H-1, g.W-2, edge)
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g.VLine(0, 1, g.H-2, edge)
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g.VLine(g.W-1, 1, g.H-2, edge)
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if focus {
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g.Checker(0, g.H-2, g.W, 1, pixel.Accent)
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}
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}
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// result wraps an editor's events and logs submits.
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func result(e *ui.Element, ed pixel.Edit, label string) TextInputResult {
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if ed.Submitted {
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slog.Debug("8bit: field submitted", "label", label)
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}
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return TextInputResult{Element: e, Input: ed.Input, Changed: ed.Changed, Submitted: ed.Submitted, Focused: ed.Focused}
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}
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