From dc48249e1acea54b391f53b95f16e515dead7c97 Mon Sep 17 00:00:00 2001
From: "Andrew Gallant (Ocelot)" <Andrew.Gallant@tufts.edu>
Date: Mon, 7 May 2012 04:09:19 -0400
Subject: lots of docs and examples
---
nexgb/examples/get-active-window/main.go | 57 ++++++++++++++++++++++++++++++++
1 file changed, 57 insertions(+)
create mode 100644 nexgb/examples/get-active-window/main.go
(limited to 'nexgb/examples/get-active-window')
diff --git a/nexgb/examples/get-active-window/main.go b/nexgb/examples/get-active-window/main.go
new file mode 100644
index 0000000..e90563c
--- /dev/null
+++ b/nexgb/examples/get-active-window/main.go
@@ -0,0 +1,57 @@
+// Example get-active-window reads the _NET_ACTIVE_WINDOW property of the root
+// window and uses the result (a window id) to get the name of the window.
+package main
+
+import (
+ "fmt"
+ "log"
+
+ "github.com/BurntSushi/xgb"
+)
+
+func main() {
+ X, err := xgb.NewConn()
+ if err != nil {
+ log.Fatal(err)
+ }
+
+ // Get the window id of the root window.
+ root := X.DefaultScreen().Root
+
+ // Get the atom id (i.e., intern an atom) of "_NET_ACTIVE_WINDOW".
+ aname := "_NET_ACTIVE_WINDOW"
+ activeAtom, err := X.InternAtom(true, uint16(len(aname)), aname).Reply()
+ if err != nil {
+ log.Fatal(err)
+ }
+
+ // Get the atom id (i.e., intern an atom) of "_NET_WM_NAME".
+ aname = "_NET_WM_NAME"
+ nameAtom, err := X.InternAtom(true, uint16(len(aname)), aname).Reply()
+ if err != nil {
+ log.Fatal(err)
+ }
+
+ // Get the actual value of _NET_ACTIVE_WINDOW.
+ // Note that 'reply.Value' is just a slice of bytes, so we use an
+ // XGB helper function, 'Get32', to pull an unsigned 32-bit integer out
+ // of the byte slice. We then convert it to an X resource id so it can
+ // be used to get the name of the window in the next GetProperty request.
+ reply, err := X.GetProperty(false, root, activeAtom.Atom,
+ xgb.GetPropertyTypeAny, 0, (1<<32)-1).Reply()
+ if err != nil {
+ log.Fatal(err)
+ }
+ windowId := xgb.Id(xgb.Get32(reply.Value))
+ fmt.Printf("Active window id: %X\n", windowId)
+
+ // Now get the value of _NET_WM_NAME for the active window.
+ // Note that this time, we simply convert the resulting byte slice,
+ // reply.Value, to a string.
+ reply, err = X.GetProperty(false, windowId, nameAtom.Atom,
+ xgb.GetPropertyTypeAny, 0, (1<<32)-1).Reply()
+ if err != nil {
+ log.Fatal(err)
+ }
+ fmt.Printf("Active window name: %s\n", string(reply.Value))
+}
--
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