treetips.py

   1 import time, gobject, gtk
   2
   3 class TreeTips:
   4         timeout = None
   5         widget = None
   6         item = None
   7         time = 0
   8
   9         def show(self, parent):
  10                 if self.timeout:
  11                         gobject.source_remove(self.timeout)
  12                         self.timeout = None
  13
  14                 if self.widget:
  15                         self.widget.destroy()
  16                         self.widget = None
  17
  18                 if self.item is None:
  19                         return
  20
  21                 self.widget = gtk.Window(gtk.WINDOW_POPUP)
  22                 self.widget.set_app_paintable(True)
  23                 self.widget.set_name('gtk-tooltips')
  24
  25                 self.widget.connect('expose-event', self.tooltip_draw)
  26
  27                 label = gtk.Label(self.get_tooltip_text(self.item))
  28                 label.set_padding(4, 2)
  29                 self.widget.add(label)
  30                 label.show()
  31
  32                 w, h = self.widget.size_request()
  33                 screen = parent.get_screen()
  34                 root = screen.get_root_window()
  35                 px, py, mask = gtk.gdk.Window.get_pointer(root)
  36
  37                 m = gtk.gdk.screen_get_default().get_monitor_at_point(px, py)
  38
  39                 x = px - w / 2
  40                 y = py + 12
  41
  42                 # Test if pointer is over the tooltip window
  43                 if py >= y and py <= y + h:
  44                         y = py - h - 2
  45                 self.widget.move(x, y)
  46                 self.widget.show()
  47
  48                 self.widget.connect('destroy', self.tooltip_destroyed)
  49                 self.time = time.time()
  50
  51         def prime(self, parent, item):
  52                 if item is self.item:
  53                         return
  54
  55                 self.hide()
  56                 assert self.timeout is None
  57                 self.item = item
  58
  59                 now = time.time()
  60                 if now - self.time > 2:
  61                         delay = 1000
  62                 else:
  63                         delay = 100
  64
  65                 self.timeout = gobject.timeout_add(delay, lambda: self.show(parent))
  66
  67         def tooltip_draw(self, widget, ev):
  68                 widget.window.draw_rectangle(widget.style.fg_gc[widget.state],
  69                                         False, 0, 0,
  70                                         widget.allocation.width - 1,
  71                                         widget.allocation.height - 1)
  72
  73         def tooltip_destroyed(self, widget):
  74                 pass
  75
  76         def hide(self):
  77                 self.item = None
  78                 self.show(None)