diff options
Diffstat (limited to 'Lib/lib-tk')
| -rw-r--r-- | Lib/lib-tk/turtle.py | 46 |
1 files changed, 42 insertions, 4 deletions
diff --git a/Lib/lib-tk/turtle.py b/Lib/lib-tk/turtle.py index dde5725..d5b445a 100644 --- a/Lib/lib-tk/turtle.py +++ b/Lib/lib-tk/turtle.py @@ -11,6 +11,7 @@ class RawPen: self._canvas = canvas self._items = [] self._tracing = 1 + self._arrow = 0 self.degrees() self.reset() @@ -48,9 +49,15 @@ class RawPen: self._items = [] for item in items: canvas.delete(item) + self._delete_turtle() + self._draw_turtle() + def tracer(self, flag): self._tracing = flag + if not self._tracing: + self._delete_turtle() + self._draw_turtle() def forward(self, distance): x0, y0 = start = self._position @@ -63,6 +70,7 @@ class RawPen: def left(self, angle): self._angle = (self._angle + angle) % self._fullcircle + self._draw_turtle() def right(self, angle): self.left(-angle) @@ -87,7 +95,7 @@ class RawPen: id = self._canvas.create_line(0, 0, 0, 0, fill=color) except Tkinter.TclError: raise Error, "bad color string: %s" % `color` - self._color = color + self._set_color(color) return try: r, g, b = color @@ -103,7 +111,12 @@ class RawPen: assert 0 <= b <= 1 x = 255.0 y = 0.5 - self._color = "#%02x%02x%02x" % (int(r*x+y), int(g*x+y), int(b*x+y)) + self._set_color("#%02x%02x%02x" % (int(r*x+y), int(g*x+y), int(b*x+y))) + + def _set_color(self,color): + self._color = color + self._draw_turtle() + def write(self, arg, move=0): x, y = start = self._position @@ -115,6 +128,7 @@ class RawPen: if move: x0, y0, x1, y1 = self._canvas.bbox(item) self._goto(x1, y1) + self._draw_turtle() def fill(self, flag): if self._filling: @@ -205,20 +219,20 @@ class RawPen: if self._filling: self._path.append(self._position) if self._drawing: - if self._tracing: + if self._tracing: dx = float(x1 - x0) dy = float(y1 - y0) distance = hypot(dx, dy) nhops = int(distance) item = self._canvas.create_line(x0, y0, x0, y0, width=self._width, - arrow="last", capstyle="round", fill=self._color) try: for i in range(1, 1+nhops): x, y = x0 + dx*i/nhops, y0 + dy*i/nhops self._canvas.coords(item, x0, y0, x, y) + self._draw_turtle((x,y)) self._canvas.update() self._canvas.after(10) # in case nhops==0 @@ -233,6 +247,30 @@ class RawPen: capstyle="round", fill=self._color) self._items.append(item) + self._draw_turtle() + + def _draw_turtle(self,position=[]): + if not self._tracing: + return + if position == []: + position = self._position + x,y = position + distance = 8 + dx = distance * cos(self._angle*self._invradian) + dy = distance * sin(self._angle*self._invradian) + self._delete_turtle() + self._arrow = _canvas.create_line(x-dx,y+dy,x,y, + width=self._width, + arrow="last", + capstyle="round", + fill=self._color) + self._canvas.update() + + def _delete_turtle(self): + if self._arrow != 0: + self._canvas.delete(self._arrow) + self._arrow = 0 + _root = None |