def dragDrop(gr, ev):
"Drag a Graphic, possibly into a different canvas"
gr.hoverable = False
pos = sigma(gr.pos, ev.rel)
drop = False
try:
cv = [gr for gr in gr.sketch.objectAt(ev.pos).path if getattr(gr, "allowDrop", False)][0]
if cv is not gr.canvas:
pos = sigma(pos, delta(gr.canvas.rect.topleft, cv.rect.topleft))
drop = True
gr.setCanvas(cv)
except: pass
gr.config(pos=pos, hoverable=True)
if drop: gr.bubble("ondrop", ev)
def draw(self, srf):
c = self.canvas.rect.topleft
pos = [round(x) for x in sigma(c, self.pos)]
r = round(self.radius)
wt = self.weight
f = self._fill
s = self._stroke
rect = None
if f: rect = pygame.draw.circle(srf, f, pos, r)
if s and wt: rect = pygame.draw.circle(srf, s, pos, r, wt).inflate(wt, wt)
return pygame.Rect((0, 0), (0, 0)) if rect is None else rect
def _knobDrag(knob, ev):
"Handle drag events on the slider's 'knob' object"
slider = knob.canvas
if knob._dragRel is None:
knob._dragRel = delta(knob.rect.center, ev.pos)
if slider._lastButton in slider.allowButton:
x = pygame.event.Event(pygame.USEREVENT, pos=sigma(ev.pos, knob._dragRel))
v = slider._val
slider.val = slider._eventValue(x)
x = slider.val
setattr(ev, "target", slider)
if x != v:
setattr(ev, "method", DRAG)
slider.bubble("onchange", ev)
def scroll(self, pix=None, rel=True):
# Calculate scroll when not specified
a = self.angle
if pix is None: pix = self.focussed and a in (0, 90)
if pix is False: pix, rel = 0, False
elif pix is True: pix, rel = self._scrollCalc(a)
# Set scrolling attributes
if pix or not rel:
if rel: self._scrollX += pix
else:
tmp = pix
pix -= self._scrollX
self._scrollX = tmp
if pix:
if a == 90: self.pos = self.pos[0], self.pos[1] + pix
else: self.pos = sigma(self.pos, vec2d(pix, a))
return self
def ondrag(gr, ev):
"Move a Graphic instance while dragging"
gr.pos = sigma(gr.pos, ev.rel)
def cs(self, *pt):
return self._cs(sigma(pt, self._scroll))