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()
}
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()
}