Hello I wrote a program that creates 6 customized widgets which I called Cell and I want them to swap locations if one of them overlaps another. So I wrote a function called swap_locations and it works properly at first but when I try to swap the Cell (which I first selected) again it takes the target Cell's place but the target cell doesn't change its place. Here is my code parts that I think suspicious:
class Cell (FloatLayout, DragBehavior):
def __init__(self,**kwargs):
super(Cell, self).__init__(**kwargs)
self.previous_pos = [0,0]
def swap_locations(self, target):
target_pos = target.pos
self.pos = target_pos
target.pos = self.previous_pos
self.previous_pos = self.pos
target.previous_pos = target_pos
class BaseLayout (GridLayout):
clock = StringProperty()
day = StringProperty()
date = StringProperty()
temp = StringProperty()
icon = StringProperty()
selected_cell = Cell
target = Cell
def __init__(self, **kwargs):
super(BaseLayout, self).__init__(**kwargs),
Clock.schedule_once(self.calculate_cell_positions)
def calculate_cell_positions(self, dt):
cell_count = len(self.children)
if cell_count == 0:
return
cols = self.cols
rows = self.rows
cell_width = self.width / cols
cell_height = self.height / rows
for i, cell in enumerate(self.children):
if i % 2 == 0:
factor = 1
else:
factor = 0
row = i // cols
cell.previous_pos = [factor * cell_width, row * cell_height ]
cell.pos = cell.previous_pos
def on_touch_down(self, touch):
x, y = touch.pos
for child in self.children:
if child.collide_point(x,y):
target = child
self.selected_cell = target
return True
return True
def on_touch_move(self, touch):
if self.selected_cell:
x, y = touch.pos
self.selected_cell.pos = (x - self.selected_cell.width / 2, y - self.selected_cell.height / 2)
return True
return True
def on_touch_up(self, touch):
if self.selected_cell:
for child in self.children:
if child.collide_point(*touch.pos) and self.selected_cell != child:
self.selected_cell.swap_locations(child)
elif child.collide_point(*touch.pos) == None:
self.selected_cell.pos = self.selected_cell.previous_pos
else:
self.selected_cell.pos = self.selected_cell.previous_pos
return True
I wrote calculate_cell_positions method in order to calculate the positions of cells manually because my Cells doesn't have initial positions. It may be a dumb idea and if you have a better solution please do not hesitate to tell. Thank you!
In order to dig down and modelize the problem I attached some photos of my program1 2 3
