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tree)
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package ui
import "github.com/gdamore/tcell/v2"
type Popover struct {
x, y, width, height int
content Drawable
}
func (p *Popover) Draw(ctx *Context) {
var subcontext *Context
// trim desired width to fit
width := p.width
if p.x+p.width > ctx.Width() {
width = ctx.Width() - p.x
}
switch {
case p.y+p.height+1 < ctx.Height():
// draw below
subcontext = ctx.Subcontext(p.x, p.y+1, width, p.height)
case p.y-p.height >= 0:
// draw above
subcontext = ctx.Subcontext(p.x, p.y-p.height, width, p.height)
default:
// can't fit entirely above or below, so find the largest available
// vertical space and shrink to fit
if p.y > ctx.Height()-p.y {
// there is more space above than below
height := p.y
subcontext = ctx.Subcontext(p.x, 0, width, height)
} else {
// there is more space below than above
height := ctx.Height() - p.y
subcontext = ctx.Subcontext(p.x, p.y+1, width, height-1)
}
}
p.content.Draw(subcontext)
}
func (p *Popover) Event(e tcell.Event) bool {
if di, ok := p.content.(DrawableInteractive); ok {
return di.Event(e)
}
return false
}
func (p *Popover) Focus(f bool) {
if di, ok := p.content.(DrawableInteractive); ok {
di.Focus(f)
}
}
func (p *Popover) Invalidate() {
p.content.Invalidate()
}
func (p *Popover) OnInvalidate(f func(Drawable)) {
p.content.OnInvalidate(func(_ Drawable) {
f(p)
})
}
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