func main() {
// Initialize GTK without parsing any command line arguments.
gtk.Init(nil)
// Create a new toplevel window, set its title, and connect it to the
// "destroy" signal to exit the GTK main loop when it is destroyed.
win, err := gtk.WindowNew(gtk.WINDOW_TOPLEVEL)
if err != nil {
log.Fatal("Unable to create window:", err)
}
win.SetTitle("Simple Example")
win.Connect("destroy", func() {
gtk.MainQuit()
})
// Create a new label widget to show in the window.
l, err := gtk.LabelNew("Hello, gotk3!")
if err != nil {
log.Fatal("Unable to create label:", err)
}
// Add the label to the window.
win.Add(l)
// Set the default window size.
win.SetDefaultSize(800, 600)
// Recursively show all widgets contained in this window.
win.ShowAll()
// Begin executing the GTK main loop. This blocks until
// gtk.MainQuit() is run.
gtk.Main()
}
func main() {
gtk.Init(nil)
win, err := gtk.WindowNew(gtk.WINDOW_TOPLEVEL)
if err != nil {
log.Fatal("Unable to create window:", err)
}
win.Connect("destroy", func() {
gtk.MainQuit()
})
win.Add(windowWidget())
// Native GTK is not thread safe, and thus, gotk3's GTK bindings may not
// be used from other goroutines. Instead, glib.IdleAdd() must be used
// to add a function to run in the GTK main loop when it is in an idle
// state.
//
// Two examples of using glib.IdleAdd() are shown below. The first runs
// a user created function, LabelSetTextIdle, and passes it two
// arguments for a label and the text to set it with. The second calls
// (*gtk.Label).SetText directly, passing in only the text as an
// argument.
//
// If the function passed to glib.IdleAdd() returns one argument, and
// that argument is a bool, this return value will be used in the same
// manner as a native g_idle_add() call. If this return value is false,
// the function will be removed from executing in the GTK main loop's
// idle state. If the return value is true, the function will continue
// to execute when the GTK main loop is in this state.
go func() {
for {
time.Sleep(time.Second)
s := fmt.Sprintf("Set a label %d time(s)!", nSets)
_, err := glib.IdleAdd(LabelSetTextIdle, topLabel, s)
if err != nil {
log.Fatal("IdleAdd() failed:", err)
}
nSets++
s = fmt.Sprintf("Set a label %d time(s)!", nSets)
_, err = glib.IdleAdd(bottomLabel.SetText, s)
if err != nil {
log.Fatal("IdleAdd() failed:", err)
}
nSets++
}
}()
win.ShowAll()
gtk.Main()
}
func main() {
gtk.Init(nil)
win, err := gtk.WindowNew(gtk.WINDOW_TOPLEVEL)
if err != nil {
log.Fatal("Unable to create window:", err)
}
win.Connect("destroy", func() {
gtk.MainQuit()
})
win.Add(windowWidget())
win.ShowAll()
gtk.Main()
}
func Example() {
runtime.LockOSThread()
gtk.Init(nil)
webView := webkit2.NewWebView()
defer webView.Destroy()
webView.Connect("load-failed", func() {
fmt.Println("Load failed.")
})
webView.Connect("load-changed", func(_ *glib.Object, i int) {
loadEvent := webkit2.LoadEvent(i)
switch loadEvent {
case webkit2.LoadFinished:
fmt.Println("Load finished.")
fmt.Printf("Title: %q\n", webView.Title())
fmt.Printf("URI: %s\n", webView.URI())
webView.RunJavaScript("window.location.hostname", func(val *gojs.Value, err error) {
if err != nil {
fmt.Println("JavaScript error.")
} else {
fmt.Printf("Hostname (from JavaScript): %q\n", val)
}
gtk.MainQuit()
})
}
})
glib.IdleAdd(func() bool {
webView.LoadURI("https://www.google.com/")
return false
})
gtk.Main()
// output:
// Load finished.
// Title: "Google"
// URI: https://www.google.com/
// Hostname (from JavaScript): "www.google.com"
}
func main() {
gtk.Init(nil)
win := setupWindow()
box, _ := gtk.BoxNew(gtk.ORIENTATION_VERTICAL, 0)
win.Add(box)
tv := setupTextView(box)
props := []*BoolProperty{
&BoolProperty{"cursor visible", (*tv).GetCursorVisible, (*tv).SetCursorVisible},
&BoolProperty{"editable", (*tv).GetEditable, (*tv).SetEditable},
&BoolProperty{"overwrite", (*tv).GetOverwrite, (*tv).SetOverwrite},
&BoolProperty{"accepts tab", (*tv).GetAcceptsTab, (*tv).SetAcceptsTab},
}
setupPropertyCheckboxes(tv, box, props)
win.ShowAll()
gtk.Main()
}
func main() {
gtk.Init(nil)
win := setup_window("Simple Example")
box := setup_box(gtk.ORIENTATION_VERTICAL)
win.Add(box)
tv := setup_tview()
set_text_in_tview(tv, "Hello there!")
box.PackStart(tv, true, true, 0)
btn := setup_btn("Submit", func() {
text := get_text_from_tview(tv)
fmt.Println(text)
})
box.Add(btn)
// Recursively show all widgets contained in this window.
win.ShowAll()
// Begin executing the GTK main loop. This blocks until
// gtk.MainQuit() is run.
gtk.Main()
}
func init() {
gtk.Init(nil)
}
func init() {
runtime.LockOSThread()
gtk.Init(nil)
}
func main() {
gtk.Init(nil)
win, err := gtk.WindowNew(gtk.WINDOW_TOPLEVEL)
if err != nil {
log.Fatal("Unable to create window:", err)
}
win.SetTitle("Grid Example")
win.Connect("destroy", func() {
gtk.MainQuit()
})
// Create a new grid widget to arrange child widgets
grid, err := gtk.GridNew()
if err != nil {
log.Fatal("Unable to create grid:", err)
}
// gtk.Grid embeds an Orientable struct to simulate the GtkOrientable
// GInterface. Set the orientation from the default horizontal to
// vertical.
grid.SetOrientation(gtk.ORIENTATION_VERTICAL)
// Create some widgets to put in the grid.
lab, err := gtk.LabelNew("Just a label")
if err != nil {
log.Fatal("Unable to create label:", err)
}
btn, err := gtk.ButtonNewWithLabel("Button with label")
if err != nil {
log.Fatal("Unable to create button:", err)
}
entry, err := gtk.EntryNew()
if err != nil {
log.Fatal("Unable to create entry:", err)
}
spnBtn, err := gtk.SpinButtonNewWithRange(0.0, 1.0, 0.001)
if err != nil {
log.Fatal("Unable to create spin button:", err)
}
nb, err := gtk.NotebookNew()
if err != nil {
log.Fatal("Unable to create notebook:", err)
}
// Calling (*gtk.Container).Add() with a gtk.Grid will add widgets next
// to each other, in the order they were added, to the right side of the
// last added widget when the grid is in a horizontal orientation, and
// at the bottom of the last added widget if the grid is in a vertial
// orientation. Using a grid in this manner works similar to a gtk.Box,
// but unlike gtk.Box, a gtk.Grid will respect its child widget's expand
// and margin properties.
grid.Add(btn)
grid.Add(lab)
grid.Add(entry)
grid.Add(spnBtn)
// Widgets may also be added by calling (*gtk.Grid).Attach() to specify
// where to place the widget in the grid, and optionally how many rows
// and columns to span over.
//
// Additional rows and columns are automatically added to the grid as
// necessary when new widgets are added with (*gtk.Container).Add(), or,
// as shown in this case, using (*gtk.Grid).Attach().
//
// In this case, a notebook is added beside the widgets inserted above.
// The notebook widget is inserted with a left position of 1, a top
// position of 1 (starting at the same vertical position as the button),
// a width of 1 column, and a height of 2 rows (spanning down to the
// same vertical position as the entry).
//
// This example also demonstrates how not every area of the grid must
// contain a widget. In particular, the area to the right of the label
// and the right of spin button have contain no widgets.
grid.Attach(nb, 1, 1, 1, 2)
nb.SetHExpand(true)
nb.SetVExpand(true)
// Add a child widget and tab label to the notebook so it renders.
nbChild, err := gtk.LabelNew("Notebook content")
if err != nil {
log.Fatal("Unable to create button:", err)
}
nbTab, err := gtk.LabelNew("Tab label")
if err != nil {
log.Fatal("Unable to create label:", err)
}
nb.AppendPage(nbChild, nbTab)
// Add the grid to the window, and show all widgets.
win.Add(grid)
win.ShowAll()
gtk.Main()
}
func main() {
flag.Usage = func() {
fmt.Fprintln(os.Stderr)
fmt.Fprintf(os.Stderr, "webkit-eval-js evaluates a JavaScript expression in the context of a web page\n")
fmt.Fprintf(os.Stderr, "running in a headless instance of the WebKit browser.\n\n")
fmt.Fprintf(os.Stderr, "Usage:\n\n")
fmt.Fprintf(os.Stderr, "\twebkit-eval-js url script-file\n\n")
fmt.Fprintf(os.Stderr, "url is the web page to execute the script in, and script-file is a local file\n")
fmt.Fprintf(os.Stderr, "with the JavaScript you want to evaluate. The result is printed to stdout as JSON.\n\n")
fmt.Fprintln(os.Stderr)
fmt.Fprintf(os.Stderr, "Example usage:\n\n")
fmt.Fprintf(os.Stderr, "\tTo return the value of `document.title` on https://google.com:\n")
fmt.Fprintf(os.Stderr, "\t $ echo document.title | webkit-eval-js https://google.com /dev/stdin\n")
fmt.Fprintf(os.Stderr, "\tPrints:\n")
fmt.Fprintf(os.Stderr, "\t \"Google\"\n\n")
fmt.Fprintf(os.Stderr, "Notes:\n\n")
fmt.Fprintf(os.Stderr, "\tBecause a headless WebKit instance is used, your $DISPLAY must be set. Use\n")
fmt.Fprintf(os.Stderr, "\tXvfb if you are running on a machine without an existing X server. See\n")
fmt.Fprintf(os.Stderr, "\thttps://sourcegraph.com/github.com/sourcegraph/go-webkit2/readme for more info.\n")
fmt.Fprintln(os.Stderr)
os.Exit(1)
}
flag.Parse()
if flag.NArg() != 2 {
flag.Usage()
os.Exit(1)
}
log := log.New(os.Stderr, "", 0)
pageURL := flag.Arg(0)
scriptFile := flag.Arg(1)
if _, err := url.Parse(pageURL); err != nil {
log.Fatalf("Failed to parse URL %q: %s", pageURL, err)
}
script, err := ioutil.ReadFile(scriptFile)
if err != nil {
log.Fatalf("Failed to open script file %q: %s", scriptFile, err)
}
runtime.LockOSThread()
gtk.Init(nil)
webView := webkit2.NewWebView()
defer webView.Destroy()
webView.Connect("load-failed", func() {
fmt.Println("Load failed.")
})
webView.Connect("load-changed", func(_ *glib.Object, event int) {
loadEvent := webkit2.LoadEvent(event)
switch loadEvent {
case webkit2.LoadFinished:
webView.RunJavaScript(string(script), func(val *gojs.Value, err error) {
if err != nil {
log.Fatalf("JavaScript error: %s", err)
} else {
json, err := val.JSON()
if err != nil {
log.Fatal("JavaScript serialization error: %s", err)
}
fmt.Println(string(json))
}
gtk.MainQuit()
})
}
})
glib.IdleAdd(func() bool {
webView.LoadURI(pageURL)
return false
})
gtk.Main()
}