class ExpressionLayout(BoxLayout):
"""
Expression Layout class is the base class for each expression.
One can extend this class to add new Expression.
"""
def __init__(self, line, name, var_list=[], **kwargs):
super(ExpressionLayout, self).__init__(**kwargs)
self.line = line
self.name = name
self.size_hint=(None, None)
self.var_list = var_list
self.current_touch = False
self.txtbox_lineno = TextInput(text=str(self.line), size_hint=(.1,1))
self.btn_delete = Button(text="Del", size_hint =(.1,1))
self.lbl_name = Label(text=self.name, size_hint=(.1,1))
"""
Creates and returns a new combo edit for list of variables
"""
def get_cmb_variables(self):
btn_variables = []
for var in self.var_list:
btn_variables.append(Button(text = str.strip(str(var)),size_hint_y=None,height=40))
return ComboEdit( size_hint= (.1, 1), height=50, options=btn_variables)
"""
Add the widgets to the layout
"""
def draw(self):
self.add_widget(self.btn_delete)
self.add_widget(self.txtbox_lineno)
self.add_widget(self.lbl_name)
"""
Deletes the expression from the workspace
"""
def delete_btn_click_event(self, instance):
self.btn_delete._bind(on_press, instance)
"""
Get the line number
"""
def get_line_number(self):
return self.line
def set_line_number(self, number):
self.set_line_number = number
def on_touch_down(self, touch):
super(ExpressionLayout, self).on_touch_down(touch)
if self.collide_point(*touch.pos):
return self.get_line_number()
"""
Get all the values from the layout interface and convert it into list that gets sent to interpreter for computation
All the Expression must implement this method.
"""
def get_expression(self):
self.line = int(self.txtbox_lineno.text)
pass
def on_touch_down(self, touch):
super(ExpressionLayout, self).on_touch_down(touch)
if self.collide_point(*touch.pos):
self.current_touch = True
print 'touch'
print touch
