Esempio n. 1
0
func windowWidget() *gtk.Widget {
	grid, err := gtk.GridNew()
	if err != nil {
		log.Fatal("Unable to create grid:", err)
	}
	grid.SetOrientation(gtk.ORIENTATION_VERTICAL)

	entry, err := gtk.EntryNew()
	if err != nil {
		log.Fatal("Unable to create entry:", err)
	}
	s, _ := entry.GetText()
	label, err := gtk.LabelNew(s)
	if err != nil {
		log.Fatal("Unable to create label:", err)
	}
	grid.Add(entry)
	entry.SetHExpand(true)
	grid.AttachNextTo(label, entry, gtk.POS_RIGHT, 1, 1)
	label.SetHExpand(true)

	// Connects this entry's "activate" signal (which is emitted whenever
	// Enter is pressed when the Entry is activated) to an anonymous
	// function that gets the current text of the entry and sets the text of
	// the label beside it with it.  Unlike with native GTK callbacks,
	// (*glib.Object).Connect() supports closures.  In this example, this is
	// demonstrated by using the label variable.  Without closures, a
	// pointer to the label would need to be passed in as user data
	// (demonstrated in the next example).
	entry.Connect("activate", func() {
		s, _ := entry.GetText()
		label.SetText(s)
	})

	sb, err := gtk.SpinButtonNewWithRange(0, 1, 0.1)
	if err != nil {
		log.Fatal("Unable to create spin button:", err)
	}
	pb, err := gtk.ProgressBarNew()
	if err != nil {
		log.Fatal("Unable to create progress bar:", err)
	}
	grid.Add(sb)
	sb.SetHExpand(true)
	grid.AttachNextTo(pb, sb, gtk.POS_RIGHT, 1, 1)
	label.SetHExpand(true)

	// Pass in a ProgressBar and the target SpinButton as user data rather
	// than using the sb and pb variables scoped to the anonymous func.
	// This can be useful when passing in a closure that has already been
	// generated, but when you still wish to connect the callback with some
	// variables only visible in this scope.
	sb.Connect("value-changed", func(sb *gtk.SpinButton, pb *gtk.ProgressBar) {
		pb.SetFraction(sb.GetValue() / 1)
	}, pb)

	label, err = gtk.LabelNew("")
	if err != nil {
		log.Fatal("Unable to create label:", err)
	}
	s = "Hyperlink to <a href=\"https://www.cyphertite.com/\">Cyphertite</a> for your clicking pleasure"
	label.SetMarkup(s)
	grid.AttachNextTo(label, sb, gtk.POS_BOTTOM, 2, 1)

	// Some GTK callback functions require arguments, such as the
	// 'gchar *uri' argument of GtkLabel's "activate-link" signal.
	// These can be used by using the equivalent go type (in this case,
	// a string) as a closure argument.
	label.Connect("activate-link", func(_ *gtk.Label, uri string) {
		fmt.Println("you clicked a link to:", uri)
	})

	return &grid.Container.Widget
}
Esempio n. 2
0
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()
}