80e891a802
This is a simple mostly straight forward switch to tcell in favor of termbox. It uses the tcell native api (not the compat layer) but does not make use of most features. Further changes should include moving to tcell's views.TextArea and the general built in widget behaviour instead of the current ad hoc implementation. Regression: Cursor isn't shown in ex-line
68 lines
1.2 KiB
Go
68 lines
1.2 KiB
Go
package ui
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import (
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"github.com/mattn/go-runewidth"
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"github.com/gdamore/tcell"
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)
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const (
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TEXT_LEFT = iota
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TEXT_CENTER = iota
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TEXT_RIGHT = iota
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)
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type Text struct {
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text string
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strategy uint
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fg tcell.Color
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bg tcell.Color
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onInvalidate func(d Drawable)
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}
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func NewText(text string) *Text {
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return &Text{text: text}
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}
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func (t *Text) Text(text string) *Text {
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t.text = text
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t.Invalidate()
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return t
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}
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func (t *Text) Strategy(strategy uint) *Text {
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t.strategy = strategy
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t.Invalidate()
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return t
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}
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func (t *Text) Color(fg tcell.Color, bg tcell.Color) *Text {
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t.fg = fg
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t.bg = bg
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t.Invalidate()
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return t
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}
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func (t *Text) Draw(ctx *Context) {
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size := runewidth.StringWidth(t.text)
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x := 0
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if t.strategy == TEXT_CENTER {
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x = (ctx.Width() - size) / 2
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}
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if t.strategy == TEXT_RIGHT {
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x = ctx.Width() - size
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}
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style := tcell.StyleDefault.Background(t.bg).Foreground(t.fg)
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ctx.Fill(0, 0, ctx.Width(), ctx.Height(), ' ', style)
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ctx.Printf(x, 0, style, t.text)
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}
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func (t *Text) OnInvalidate(onInvalidate func(d Drawable)) {
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t.onInvalidate = onInvalidate
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}
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func (t *Text) Invalidate() {
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if t.onInvalidate != nil {
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t.onInvalidate(t)
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}
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}
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