I'm making a game in kivy, and I have a Label with a text that says "GAME OVER" I want this text to appear whenever the game is over and disappear whenever I click on "start game". How can I do that? I tried a lot but can't seem to find any solution, Any help is appreciated! Thank You so much! Below is my code!
main.py
from kivy.app import App
from kivy.uix.screenmanager import Screen
from kivy.uix.image import Image
from kivy.core.audio import SoundLoader
from kivy.clock import Clock
from kivy.properties import NumericProperty
from kivy.vector import Vector
class HomeScreen(Screen):
pass
def play_sound(self):
sound = SoundLoader.load('button press sound.wav.')
if sound:
sound.play()
sound = SoundLoader.load('Crowd sound effect.wav')
sound.loop = True
sound.play()
class GameScreen(Screen):
pass
def play_sound(self):
sound = SoundLoader.load('button press sound.wav.')
if sound:
sound.play()
class Ball(Image):
velocity = NumericProperty(0)
def on_touch_down(self, touch):
if Vector(self.center).distance(touch.pos) <= 33:
label = App.get_running_app().root.get_screen('game_screen').ids.score
label.text = str(int(label.text) + 1)
sound = SoundLoader.load('Soccer ball sound.wav')
sound.play()
self.source = "icons/ball.png"
self.velocity = 275
return super().on_touch_down(touch)
def on_touch_up(self, touch):
if Vector(self.center).distance(touch.pos) <= 33:
self.source = "icons/ball.png"
return super().on_touch_up(touch)
class MainApp(App):
GRAVITY = 300
def move_ball(self, time_passed):
ball = self.root.ids.game_screen.ids.ball
ball.y = ball.y + ball.velocity * time_passed
ball.velocity = ball.velocity - self.GRAVITY * time_passed
self.check_collision()
def check_collision(self):
ball = self.root.ids.game_screen.ids.ball
if ball.top < 96:
self.root.ids.game_screen.ids.score.text = "0"
self.game_over()
def game_over(self):
self.root.ids.game_screen.ids.ball.pos = (0, (0.5) )
print("game over")
self.frames.cancel()
self.root.ids.game_screen.ids.start_button.disabled = False
self.root.ids.game_screen.ids.start_button.opacity = 1
def next_frame(self, time_passed):
self.move_ball(time_passed)
def start_game(self):
#Clock.schedule_interval(self.move_ball, 1/60.)
self.root.ids.game_screen.ids.ball.velocity = 275
self.frames = Clock.schedule_interval(self.next_frame, 1/60.)
self.root.ids.game_screen.ids.score.text = "0"
def change_screen(self, screen_name):
self.root.current = screen_name
MainApp().run()
homescreen.kv
#:import utils kivy.utils
#:import FadeTransition kivy.uix.screenmanager.FadeTransition
<HomeScreen>:
FloatLayout:
canvas:
Color:
rgb: utils.get_color_from_hex("#39B3F2")
Rectangle:
size: self.size
pos: self.pos
GridLayout:
rows: 1
pos_hint: {"top": 1, "left": 1}
size_hint: 1, .9
Image:
source: "icons/keepyup.png"
FloatLayout:
Button:
font_size: dp(20)
font_name: 'SackersGothicStd-Medium.otf'
text: "PLAY"
color: "gold"
pos_hint: { "center_x": .5, "center_y": .3}
size: 80, 55
size_hint: None, None
background_normal: ''
background_color: (57/255.0, 179/255.0, 242/255.0, .10)
on_press:
on_release:
root.play_sound()
root.manager.transition = FadeTransition()
app.change_screen("game_screen")
gamescreen.kv
#:import utils kivy.utils
<GameScreen>:
FloatLayout:
canvas:
Color:
rgb: utils.get_color_from_hex("#39B3F2")
Rectangle:
size: self.size
pos: self.pos
GridLayout:
rows: 1
pos_hint: {"top": 1, "left": 1}
size_hint: 1, .1
Image:
source: "icons/sun.png"
GridLayout:
rows: 1
pos_hint: {"top": 1, "left": 1}
size_hint: 1, .2
Image:
source: "icons/clouds.png"
GridLayout:
rows: 1
pos_hint: {"bottom": 1, "left": 1}
size_hint: 1, .5
Image:
source: "icons/Field4.png"
allow_stretch: True
keep_ratio: False
pos: self.pos
Label:
id: score
size_hint: None, None
font_size: dp(25)
font_name: 'SackersGothicStd-Medium.otf'
text: "0"
color: "gold"
pos_hint: { "center_x": 0.1, "center_y": 0.9}
Label:
id: over
size_hint: None, None
font_size: dp(25)
font_name: 'SackersGothicStd-Medium.otf'
text: "GAME OVER!"
color: "gold"
outline_color: "white"
outline_width: 1
pos_hint: { "center_x": 0.5, "center_y": 0.6}
Button:
size_hint: None, None
font_size: dp(20)
font_name: 'SackersGothicStd-Medium.otf'
text: "Start Game"
color: "gold"
pos_hint: { "center_x": 0.5, "center_y": 0.3}
size: 150, 55
size_hint: None, None
background_normal: ''
background_color: (57/255.0, 179/255.0, 242/255.0, .10)
id: start_button
on_release:
self.disabled = True
self.opacity = 0
root.play_sound()
app.start_game()
Ball:
source: "icons/ball.png"
size_hint: None, None
size: 500, 500
pos_hint: {"center_x": 0.5}
id: ball
main.kv
#:include kv/homescreen.kv
#:include kv/gamescreen.kv
ScreenManager:
id: screen_manager
HomeScreen:
name: "home_screen"
id: home_screen
GameScreen:
name: "game_screen"
id: game_screen
You can just modify the opacity of the Label. In your start_game() method, set the opacity to 0:
def start_game(self):
#Clock.schedule_interval(self.move_ball, 1/60.)
self.root.ids.game_screen.ids.ball.velocity = 275
self.frames = Clock.schedule_interval(self.next_frame, 1/60.)
self.root.ids.game_screen.ids.score.text = "0"
self.root.ids.game_screen.ids.over.opacity = 0
And in the game_over() method, set the opacity to 1:
def game_over(self):
self.root.ids.game_screen.ids.ball.pos = (0, (0.5) )
print("game over")
self.frames.cancel()
self.root.ids.game_screen.ids.start_button.disabled = False
self.root.ids.game_screen.ids.start_button.opacity = 1
self.root.ids.game_screen.ids.over.opacity = 1