def __init__(self,**args):
CrCanvas.__init__(self,**args)
# finite world init:
#self.set_scroll_region(0,0,2000,2000)
self.scroll_to(0,0)
# infinite world should replace scroll_region
self.set_scroll_factor(20,20)
self.set_max_scale_factor(16,16)
self.set_min_scale_factor(.0125,.0125)
self.props.maintain_center = False
self.panner = Panner(canvas=self)
self.zoomer = Zoomer(canvas=self,
fill_color_rgba=0x8888ff22,
outline_color_rgba=0x22)
self.zoomer.props.corner_to_corner = True
self.zoomer.props.maintain_aspect = False
self.grid = None
self.root.add(Line(points=[-5,0,5,0],outline_color='gray66'))
self.root.add(Line(points=[0,-5,0,5],outline_color='gray66'))
self.connect("event",Canvas.eventhandler)
class Canvas(CrCanvas):
textures = {}
def __init__(self,**args):
CrCanvas.__init__(self,**args)
# finite world init:
#self.set_scroll_region(0,0,2000,2000)
self.scroll_to(0,0)
# infinite world should replace scroll_region
self.set_scroll_factor(20,20)
self.set_max_scale_factor(16,16)
self.set_min_scale_factor(.0125,.0125)
self.props.maintain_center = False
self.panner = Panner(canvas=self)
self.zoomer = Zoomer(canvas=self,
fill_color_rgba=0x8888ff22,
outline_color_rgba=0x22)
self.zoomer.props.corner_to_corner = True
self.zoomer.props.maintain_aspect = False
self.grid = None
self.root.add(Line(points=[-5,0,5,0],outline_color='gray66'))
self.root.add(Line(points=[0,-5,0,5],outline_color='gray66'))
self.connect("event",Canvas.eventhandler)
def eventhandler(self,e):
if e.type == gtk.gdk.KEY_PRESS:
kvn = gtk.gdk.keyval_name(e.keyval)
if kvn == 'a':
self.scroll_to(0,0)
if kvn == 'Control_L':
self.zoomer.activate()
self.root.set_z(self.zoomer.box,-1)
elif kvn == 'plus' and self.zoomer.props.active:
self.zoom(1.2,1.2)
elif kvn == 'minus' and self.zoomer.props.active:
self.zoom(.8,.8)
return False
elif e.type == gtk.gdk.KEY_RELEASE:
if gtk.gdk.keyval_name(e.keyval) == 'Control_L':
self.zoomer.deactivate()
return True
elif e.type == gtk.gdk.SCROLL and self.zoomer.props.active:
if e.direction == gtk.gdk.SCROLL_UP:
self.zoom(1.2,1.2)
elif e.direction == gtk.gdk.SCROLL_DOWN:
self.zoom(.8,.8)
return True
elif e.type == gtk.gdk.BUTTON_PRESS:
print "click:(%d,%d)"%e.get_coords()
return False
def grid(self,dx=10,dy=10):
if self.grid:
self.grid.props.visible= not self.grid.props.visible
else:
pass
# textures are shared by all engine objects with a classmethod :
@classmethod
def loadTexture(Canvas, path):
if Canvas.textures.has_key(path) :
surface = Canvas.textures[path]
else:
surface = self.image_load(path)
Canvas.textures[path] = surface
return surface
# engine dependent method, should be overwritten:
def image_load(self,path):
raise NotImplementedError
