krampus19/alui/button.go

package alui

import (
	"opslag.de/schobers/allg5"
	"opslag.de/schobers/geom"
)

var _ Control = &Button{}

type Button struct {
	ControlBase

	Text      string
	TextAlign allg5.HorizontalAlignment
}

func NewButton(text string, onClick func()) *Button {
	b := &Button{Text: text}
	b.OnClick = onClick
	return b
}

func (b *Button) DesiredSize(ctx *Context) geom.PointF32 {
	font := ctx.Fonts.Get(b.Font)
	w := font.TextWidth(b.Text)
	return geom.PtF32(w+8, font.Height()+8)
}

func (b *Button) Render(ctx *Context, bounds geom.RectangleF32) {
	fore := ctx.Palette.Primary
	if b.Over {
		fore = ctx.Palette.Dark
		ctx.Cursor = allg5.MouseCursorLink
	}
	font := ctx.Fonts.Get(b.Font)
	ctx.Fonts.DrawAlignFont(font, bounds.Min.X+4, bounds.Min.Y+4, bounds.Max.X-4, fore, b.TextAlign, b.Text)
}