github.com/coming-chat/gomobile@v0.0.0-20220601074111-56995f7d7aba/app/internal/testapp/testapp.go (about)

     1  // Copyright 2015 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  //go:build darwin || linux
     6  // +build darwin linux
     7  
     8  // Small test app used by app/app_test.go.
     9  package main
    10  
    11  import (
    12  	"log"
    13  	"net"
    14  
    15  	"golang.org/x/mobile/app"
    16  	"golang.org/x/mobile/app/internal/apptest"
    17  	"golang.org/x/mobile/event/lifecycle"
    18  	"golang.org/x/mobile/event/paint"
    19  	"golang.org/x/mobile/event/size"
    20  	"golang.org/x/mobile/event/touch"
    21  	"golang.org/x/mobile/gl"
    22  )
    23  
    24  func main() {
    25  	app.Main(func(a app.App) {
    26  		var (
    27  			glctx   gl.Context
    28  			visible bool
    29  		)
    30  
    31  		addr := "127.0.0.1:" + apptest.Port
    32  		log.Printf("addr: %s", addr)
    33  
    34  		conn, err := net.Dial("tcp", addr)
    35  		if err != nil {
    36  			log.Fatal(err)
    37  		}
    38  		defer conn.Close()
    39  		log.Printf("dialled")
    40  		comm := &apptest.Comm{
    41  			Conn:   conn,
    42  			Fatalf: log.Panicf,
    43  			Printf: log.Printf,
    44  		}
    45  
    46  		comm.Send("hello_from_testapp")
    47  		comm.Recv("hello_from_host")
    48  
    49  		color := "red"
    50  		sendPainting := false
    51  		for e := range a.Events() {
    52  			switch e := a.Filter(e).(type) {
    53  			case lifecycle.Event:
    54  				switch e.Crosses(lifecycle.StageVisible) {
    55  				case lifecycle.CrossOn:
    56  					comm.Send("lifecycle_visible")
    57  					sendPainting = true
    58  					visible = true
    59  					glctx, _ = e.DrawContext.(gl.Context)
    60  				case lifecycle.CrossOff:
    61  					comm.Send("lifecycle_not_visible")
    62  					visible = false
    63  				}
    64  			case size.Event:
    65  				comm.Send("size", e.PixelsPerPt, e.Orientation)
    66  			case paint.Event:
    67  				if visible {
    68  					if color == "red" {
    69  						glctx.ClearColor(1, 0, 0, 1)
    70  					} else {
    71  						glctx.ClearColor(0, 1, 0, 1)
    72  					}
    73  					glctx.Clear(gl.COLOR_BUFFER_BIT)
    74  					a.Publish()
    75  				}
    76  				if sendPainting {
    77  					comm.Send("paint", color)
    78  					sendPainting = false
    79  				}
    80  			case touch.Event:
    81  				comm.Send("touch", e.Type, e.X, e.Y)
    82  				if e.Type == touch.TypeEnd {
    83  					if color == "red" {
    84  						color = "green"
    85  					} else {
    86  						color = "red"
    87  					}
    88  					sendPainting = true
    89  					// Send a paint event so the screen gets redrawn.
    90  					a.Send(paint.Event{})
    91  				}
    92  			}
    93  		}
    94  	})
    95  }