forked from joejulian/gio
Egon Elbre
79 lines
1.4 KiB
Go
79 lines
1.4 KiB
Go
// SPDX-License-Identifier: Unlicense OR MIT
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package main
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// Multiple windows in Gio.
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import (
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"log"
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"gioui.org/app"
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"gioui.org/io/event"
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"gioui.org/io/system"
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"gioui.org/layout"
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"gioui.org/op"
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"gioui.org/unit"
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"gioui.org/widget"
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"gioui.org/widget/material"
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"gioui.org/font/gofont"
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)
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type window struct {
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*app.Window
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more widget.Clickable
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close widget.Clickable
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}
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func main() {
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newWindow()
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app.Main()
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}
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func newWindow() {
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go func() {
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w := new(window)
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w.Window = app.NewWindow()
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if err := w.loop(w.Events()); err != nil {
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log.Fatal(err)
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}
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}()
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}
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func (w *window) loop(events <-chan event.Event) error {
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th := material.NewTheme(gofont.Collection())
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var ops op.Ops
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for {
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e := <-events
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switch e := e.(type) {
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case system.DestroyEvent:
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return e.Err
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case system.FrameEvent:
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for w.more.Clicked() {
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newWindow()
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}
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for w.close.Clicked() {
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w.Close()
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}
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gtx := layout.NewContext(&ops, e)
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layout.Center.Layout(gtx, func(gtx layout.Context) layout.Dimensions {
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return layout.Flex{
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Alignment: layout.Middle,
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}.Layout(gtx,
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RigidInset(material.Button(th, &w.more, "More!").Layout),
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RigidInset(material.Button(th, &w.close, "Close").Layout),
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)
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})
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e.Frame(gtx.Ops)
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}
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}
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}
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func RigidInset(w layout.Widget) layout.FlexChild {
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return layout.Rigid(func(gtx layout.Context) layout.Dimensions {
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return layout.UniformInset(unit.Sp(5)).Layout(gtx, w)
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})
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}
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