zntg/ui/examples/01_basic/basic.go

package main

import (
	"image/color"
	"log"

	"opslag.de/schobers/geom"

	"opslag.de/schobers/zntg/allg5"
	"opslag.de/schobers/zntg/ui"
	"opslag.de/schobers/zntg/ui/allg5ui"
)

func run() error {
	var render, err = allg5ui.NewRenderer(800, 600, allg5.NewDisplayOptions{})
	if err != nil {
		return err
	}
	defer render.Destroy()

	err = render.RegisterFont("../resources/font/OpenSans-Regular.ttf", "default", 14)
	if err != nil {
		return err
	}
	plus, err := render.CreateImagePath("../resources/images/plus.png")
	if err != nil {
		return err
	}
	defer plus.Destroy()

	var stretch = func(content ui.Control, margin float32) ui.Control {
		return ui.BuildSpacing(content, func(s *ui.Spacing) {
			s.Width = ui.Infinite()
			s.Margin.Left = ui.Fixed(margin)
			s.Margin.Top = ui.Fixed(margin)
			s.Margin.Right = ui.Fixed(margin)
			s.Margin.Bottom = ui.Fixed(margin)
		})
	}

	var style = ui.DefaultStyle()
	var view = ui.BuildStackPanel(ui.OrientationVertical, func(p *ui.StackPanel) {
		p.Background = color.White
		p.Children = []ui.Control{
			&ui.Label{Text: "Hello, world!"},
			ui.BuildStackPanel(ui.OrientationHorizontal, func(p *ui.StackPanel) {
				p.Children = []ui.Control{
					stretch(ui.BuildIconButton(plus, "Contained", func(b *ui.Button) { b.Type = ui.ButtonTypeContained }), 8),
					stretch(ui.BuildIconButton(plus, "Icon", func(b *ui.Button) { b.Type = ui.ButtonTypeIcon }), 8),
					stretch(ui.BuildIconButton(plus, "Outlined", func(b *ui.Button) { b.Type = ui.ButtonTypeOutlined }), 8),
					stretch(ui.BuildIconButton(plus, "Text", func(b *ui.Button) { b.Type = ui.ButtonTypeText }), 8),
				}
			}),
			ui.BuildStackPanel(ui.OrientationHorizontal, func(p *ui.StackPanel) {
				p.Children = []ui.Control{
					&ui.Checkbox{},
					ui.BuildCheckbox("Check me!", nil),
				}
			}),
			ui.Stretch(&ui.Label{Text: "Content"}),
			ui.Margin(ui.StretchWidth(ui.BuildTextBox(func(b *ui.TextBox) {
				b.Text = "Type here..."
			})), 8),
			ui.Margin(ui.BuildButton("Quit", func(b *ui.Button) {
				b.OnClick(func(ctx ui.Context, _ ui.Control, _ geom.PointF32, _ ui.MouseButton) {
					ctx.Quit()
				})
			}), 8),
			ui.BuildLabel("Status...", func(l *ui.Label) {
				l.Background = style.Palette.PrimaryDark
				l.Font.Color = style.Palette.TextOnPrimary
			}),
		}
	})

	return ui.RunWait(render, style, view, true)
}

func main() {
	var err = run()
	if err != nil {
		log.Fatal(err)
	}
}