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| Original file line number | Diff line number | Diff line change |
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| # Occamy GUI | ||
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| This is a minimum example of building an occamy client. | ||
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| It is based on the [bring](https://github.com/deluan/bring) implementation of the Guacamole protocol. | ||
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| Note that `bring` is a software renderer that does not utilize Gio's GPU backend. | ||
| Hence there is a lot of improvements for building this application. | ||
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| Later coding will revise the code into a gio accelerated rendering. |
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| // Copyright 2021 Changkun Ou. All rights reserved. | ||
| // Use of this source code is governed by a MIT | ||
| // license that can be found in the LICENSE file. | ||
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| package main | ||
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| import ( | ||
| "image" | ||
| "log" | ||
| "os" | ||
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| "changkun.de/x/occamy/internal/guac" | ||
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| "gioui.org/app" | ||
| "gioui.org/io/event" | ||
| "gioui.org/io/key" | ||
| "gioui.org/io/pointer" | ||
| "gioui.org/io/system" | ||
| "gioui.org/op" | ||
| "gioui.org/op/paint" | ||
| "gioui.org/unit" | ||
| ) | ||
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| func main() { | ||
| if len(os.Args) < 3 { | ||
| log.Fatal("Usage: occamy-gui <vnc|rdp> host:port") | ||
| return | ||
| } | ||
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| a, err := NewApp(os.Args[1], os.Args[2]) | ||
| if err != nil { | ||
| log.Fatalf("cannot create Occamy client: %v", err) | ||
| } | ||
| go a.Run() | ||
| app.Main() | ||
| } | ||
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| type App struct { | ||
| client *guac.Client | ||
| win *app.Window | ||
| } | ||
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| func NewApp(protocol, addr string) (a *App, err error) { | ||
| log.SetPrefix("occamy: ") | ||
| log.SetFlags(log.Ldate | log.Ltime | log.Lmicroseconds | log.Lshortfile) | ||
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| a = &App{} | ||
| a.win = app.NewWindow(app.Title("Occamy GUI Client")) | ||
| a.client, err = guac.NewClient("0.0.0.0:5636", map[string]string{ | ||
| "host": addr, | ||
| "protocol": protocol, | ||
| "username": "", | ||
| "password": "vncpassword", | ||
| }, a.win) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| w, h := 1280*2, 1024*2 | ||
| a.win.Option( | ||
| app.Size(unit.Px(float32(w)), unit.Px(float32(h))), | ||
| app.MaxSize(unit.Px(float32(w)), unit.Px(float32(h))), | ||
| app.MinSize(unit.Px(float32(w)), unit.Px(float32(h))), | ||
| ) | ||
| return a, nil | ||
| } | ||
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| func (a *App) Run() { | ||
| for e := range a.win.Events() { | ||
| switch e := e.(type) { | ||
| case system.DestroyEvent: | ||
| log.Println(e.Err) | ||
| os.Exit(0) | ||
| case system.FrameEvent: | ||
| ops := &op.Ops{} | ||
| a.updateScreen(ops, e.Queue) | ||
| e.Frame(ops) | ||
| case pointer.Event: | ||
| if err := a.client.SendMouse( | ||
| image.Point{X: int(e.Position.X), Y: int(e.Position.Y)}, | ||
| guac.MouseToGioButton[e.Buttons]); err != nil { | ||
| log.Println(err) | ||
| } | ||
| a.win.Invalidate() | ||
| case key.Event: | ||
| log.Printf("%+v, %+v", e.Name, e.Modifiers) | ||
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| // TODO: keyboard seems problematic, yet. | ||
| // See https://todo.sr.ht/~eliasnaur/gio/319 | ||
| // var keycode guac.KeyCode | ||
| // switch { | ||
| // case e.Modifiers.Contain(key.ModCtrl): | ||
| // keycode = guac.KeyCode(guac.KeyLeftControl) | ||
| // case e.Modifiers.Contain(key.ModCommand): | ||
| // keycode = guac.KeyCode(guac.KeyLeftControl) | ||
| // case e.Modifiers.Contain(key.ModShift): | ||
| // keycode = guac.KeyCode(guac.KeyLeftShift) | ||
| // case e.Modifiers.Contain(key.ModAlt): | ||
| // keycode = guac.KeyCode(guac.KeyLeftAlt) | ||
| // case e.Modifiers.Contain(key.ModSuper): | ||
| // keycode = guac.KeyCode(guac.KeySuper) | ||
| // } | ||
| // err := a.client.SendKey(keycode, e.State == key.Press) | ||
| // if err != nil { | ||
| // log.Println(err) | ||
| // } | ||
| } | ||
| } | ||
| } | ||
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| func (a *App) updateScreen(ops *op.Ops, q event.Queue) { | ||
| img, _ := a.client.Screen() | ||
| paint.NewImageOp(img).Add(ops) | ||
| paint.PaintOp{}.Add(ops) | ||
| } |
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