如何解决如何在同一个笔记本单元格中打印字符串并显示画布
在使用 ipycanvas 的 jupyter 笔记本中工作时,我遇到了打印内容并同时显示画布的问题。
打印或画布显示都有效,但两者都不起作用。
有没有办法在同一个单元格中做到这两者?
from ipycanvas import Canvas,hold_canvas
canvas = Canvas(width=600,height=600)
canvas.fill_style = '#584f4e'
canvas.fill_rect(0,600,600)
objects_to_draw = []
class Square_obj():
def __init__(self,x,y,width=100,height=40):
self.x = x
self.y = y
self.width = width
self.height = height
self.selected = False
objects_to_draw.append(self)
def set_x_y(self,x_in,y_in) :
self.x = x_in
self.y = y_in
def draw(self):
canvas.fill_style = '#38a8a4'
canvas.fill_rect(self.x - (self.width*0.5),self.y - (self.height),self.width,self.height)
if self.selected:
canvas.fill_style = '#9dcea6'
else:
canvas.fill_style = '#dee7bc'
canvas.fill_rect(self.x - (self.width*0.5),self.y - (self.height*0.5),self.height)
def is_selected(self,y_in):
x_coord = self.x - (self.width*0.5)
y_coord = self.y - (self.height*0.5)
if x_in > x_coord and x_in < (x_coord+ self.width) and y_in > y_coord and y_in < (y_coord + self.height):
self.set_selected(True)
return True
else:
self.set_selected(False)
return False
def set_selected(self,state):
self.selected = state
def canvas_restart():
canvas.clear()
canvas.fill_style = '#584f4e'
canvas.fill_rect(0,600)
def handle_mouse_down(x,y):
print("Testing")
if [o for o in objects_to_draw if o.selected]:
[o.set_selected(False) for o in objects_to_draw if o.selected]
return False
check_bool_pos = list(set([check_region.is_selected(x,y) for check_region in objects_to_draw]))
if len(check_bool_pos)== 1:
if check_bool_pos[0] == False:
s = Square_obj(x,y)
s.set_selected(False)
s.draw()
else:
canvas_restart()
[o.draw() for o in objects_to_draw]
if len(check_bool_pos)== 0:
s = Square_obj(x,y)
s.set_selected(False)
s.draw()
def handle_mouse_move(x,y):
if [o for o in objects_to_draw if o.selected]:
with hold_canvas(canvas):
[o for o in objects_to_draw if o.selected][-1].set_x_y(x,y)
canvas_restart()
[o.draw() for o in objects_to_draw]
canvas.on_mouse_down(handle_mouse_down)
canvas.on_mouse_move(handle_mouse_move)
canvas
这基本上是来自 here 的示例代码。
以这种方式执行单元格可以正确显示画布,但缺少测试消息。
如果我手动调用 handle_mouse_down()
函数,它将被打印出来。
由于我目前正在使用此示例笔记本的更复杂版本,因此我希望在使用画布时查看错误/调试消息。
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