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button.py
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button.py
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from graphics import*
class Button:
"""A button is a labeled rectangle in a window .
It is activated or deactivated with the activate ()
and deactivate () methods . The clicked (p) method
returns true if the button is active and p is inside it."""
def __init__(self , win , center , width , height , label):
"""Creates a rectangular button , eg:
qb = Button (myWin , centerPoint , width , height , 'Quit')"""
w,h = width/2.0, height/2.0
x,y = center.getX(), center.getY()
self.xmax, self.xmin = x+w, x-w
self.ymax, self.ymin = y+h, y-h
p1 = Point(self.xmin, self.ymin)
p2 = Point(self.xmax, self.ymax)
self.rect = Rectangle(p1,p2)
self.rect.setFill('lightgray')
self.rect.draw(win)
self.label = Text(center, label)
self.label.draw(win)
self.deactivate()
self.group = [self.rect,self.label]
def clicked(self, p):
"Returns true if button active and p is inside"
return (self.active and
self.xmin <= p.getX() <= self.xmax and
self.ymin <= p.getY() <= self.ymax)
def getLabel(self):
"Returns the label string of this button."
return self.label.getText()
def setLabel(self, text):
self.label.setText(text)
def activate(self):
"Sets this button to 'active'."
self.label.setFill('black')
self.rect.setWidth(2)
self.active = True
def deactivate(self):
"Sets this button to 'inactive'."
self.label.setFill('darkgrey')
self.rect.setWidth(1)
self.active = False
def undraw(self):
for each in self.group:
each.undraw()