| // Copyright 2009 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package main |
| |
| import ( |
| "fmt" |
| "os" |
| "xgb" |
| ) |
| |
| func main() { |
| c, err := xgb.Dial(os.Getenv("DISPLAY")) |
| if err != nil { |
| fmt.Printf("cannot connect: %v\n", err) |
| os.Exit(1) |
| } |
| |
| fmt.Printf("vendor = '%s'\n", string(c.Setup.Vendor)) |
| |
| win := c.NewId() |
| gc := c.NewId() |
| |
| c.CreateWindow(0, win, c.DefaultScreen().Root, 150, 150, 200, 200, 0, 0, 0, 0, nil) |
| c.ChangeWindowAttributes(win, xgb.CWEventMask, |
| []uint32{xgb.EventMaskExposure | xgb.EventMaskKeyRelease}) |
| c.CreateGC(gc, win, 0, nil) |
| c.MapWindow(win) |
| |
| atom, _ := c.InternAtom(0, "HELLO") |
| fmt.Printf("atom = %d\n", atom.Atom) |
| |
| points := make([]xgb.Point, 2) |
| points[0] = xgb.Point{5, 5} |
| points[1] = xgb.Point{100, 120} |
| |
| hosts, _ := c.ListHosts() |
| fmt.Printf("hosts = %+v\n", hosts) |
| |
| ecookie := c.ListExtensionsRequest() |
| exts, _ := c.ListExtensionsReply(ecookie) |
| for _, name := range exts.Names { |
| fmt.Printf("exts = '%s'\n", name.Name) |
| } |
| |
| for { |
| reply, err := c.WaitForEvent() |
| if err != nil { |
| fmt.Printf("error: %v\n", err) |
| os.Exit(1) |
| } |
| fmt.Printf("event %T\n", reply) |
| switch event := reply.(type) { |
| case xgb.ExposeEvent: |
| c.PolyLine(xgb.CoordModeOrigin, win, gc, points) |
| case xgb.KeyReleaseEvent: |
| fmt.Printf("key release!\n") |
| points[0].X = event.EventX |
| points[0].Y = event.EventY |
| c.PolyLine(xgb.CoordModeOrigin, win, gc, points) |
| c.Bell(75) |
| } |
| } |
| |
| c.Close() |
| } |