Exemplo n.º 1
0
func render_all(rects []Rect, m int) {
	gtk.Init(&os.Args)
	window := gtk.Window(gtk.GTK_WINDOW_TOPLEVEL)
	window.SetTitle("GTK DrawingArea")
	window.Connect("destroy", func() {
		gtk.MainQuit()
	},
		nil)

	vbox := gtk.VBox(true, 0)
	vbox.SetBorderWidth(5)
	drawingarea = gtk.DrawingArea()

	var pixmap *gdk.GdkPixmap

	drawingarea.Connect("configure-event", func() {
		if pixmap != nil {
			pixmap.Unref()
		}
		var allocation gtk.GtkAllocation
		drawingarea.GetAllocation(&allocation)
		draw = drawingarea.GetWindow().GetDrawable()
		pixmap = gdk.Pixmap(drawingarea.GetWindow().GetDrawable(), allocation.Width, allocation.Height, 24)
		gc = gdk.GC(pixmap.GetDrawable())
		gc.SetRgbFgColor(gdk.Color("white"))
		pixmap.GetDrawable().DrawRectangle(gc, true, 0, 0, -1, -1)
		gc.SetRgbFgColor(gdk.Color("black"))
		gc.SetRgbBgColor(gdk.Color("white"))
	},
		nil)

	drawingarea.Connect("expose-event", func() {
		if pixmap != nil {
			drawingarea.GetWindow().GetDrawable().DrawDrawable(gc,
				pixmap.GetDrawable(), 0, 0, 0, 0, -1, -1)
		}
		draw_all(rects, m)
	},
		nil)

	vbox.Add(drawingarea)

	window.Add(vbox)
	window.Maximize()
	window.ShowAll()

	gtk.Main()
}
Exemplo n.º 2
0
func main() {
	gtk.Init(&os.Args)
	window := gtk.Window(gtk.GTK_WINDOW_TOPLEVEL)
	window.SetTitle("GTK DrawingArea")
	window.Connect("destroy", func() {
		gtk.MainQuit()
	},
		nil)

	vbox := gtk.VBox(true, 0)
	vbox.SetBorderWidth(5)
	drawingarea := gtk.DrawingArea()

	var p1, p2 point
	var mt uint
	var gdkwin *gdk.GdkWindow
	var pixmap *gdk.GdkPixmap
	var gc *gdk.GdkGC
	p1.x = -1
	p1.y = -1

	drawingarea.Connect("configure-event", func() {
		if pixmap != nil {
			pixmap.Unref()
		}
		var allocation gtk.GtkAllocation
		drawingarea.GetAllocation(&allocation)
		pixmap = gdk.Pixmap(drawingarea.GetWindow().GetDrawable(), allocation.Width, allocation.Height, 24)
		gc = gdk.GC(pixmap.GetDrawable())
		gc.SetRgbFgColor(gdk.Color("white"))
		pixmap.GetDrawable().DrawRectangle(gc, true, 0, 0, -1, -1)
		gc.SetRgbFgColor(gdk.Color("black"))
		gc.SetRgbBgColor(gdk.Color("white"))
	},
		nil)

	drawingarea.Connect("motion-notify-event", func() {
		if gdkwin == nil {
			gdkwin = drawingarea.GetWindow()
		}
		gdkwin.GetPointer(&p2.x, &p2.y, &mt)
		if p1.x != -1 && p2.x != -1 && (mt&gdk.GDK_BUTTON_PRESS_MASK) != 0 {
			pixmap.GetDrawable().DrawLine(gc, p1.x, p1.y, p2.x, p2.y)
			drawingarea.GetWindow().Invalidate(nil, false)
		}
		p1 = p2
	},
		nil)

	drawingarea.Connect("expose-event", func() {
		if pixmap != nil {
			drawingarea.GetWindow().GetDrawable().DrawDrawable(gc, pixmap.GetDrawable(), 0, 0, 0, 0, -1, -1)
		}
	},
		nil)

	drawingarea.SetEvents(gdk.GDK_POINTER_MOTION_MASK | gdk.GDK_POINTER_MOTION_HINT_MASK | gdk.GDK_BUTTON_PRESS_MASK)
	vbox.Add(drawingarea)

	window.Add(vbox)
	window.SetSizeRequest(400, 400)
	window.ShowAll()

	gtk.Main()
}