[英]How do I change the text in a Button class for Pygame?
我為我的游戲制作了一個按鈕 class ,我想在單擊它們時將文件中的不同文本分配給顯示的按鈕,但是在分配初始分配后我什至無法更改文本。 每當我運行b.text = "New text"
並將其打印出來時,控制台都會顯示新文本,但游戲 window 仍然會顯示“占位符文本”。
編碼:
import pygame, sys
pygame.init()
screen = pygame.display.set_mode((900,600),0,32)
clock = pygame.time.Clock()
font = pygame.font.Font('freesansbold.ttf', 32)
class Button():
def __init__(self, text, x, y):
self.text = text
self.render = font.render(self.text, True, 'white')
self.text_width = self.render.get_width()
self.text_height = self.render.get_height()
self.box = pygame.Surface((self.text_width, self.text_height))
self.box.set_alpha(0)
screen.blit(self.box, (x, y))
self.rect = self.render.get_rect()
self.rect.topleft = (x, y)
self.clicked = False
def draw(self):
screen.blit(self.box, (self.rect.x, self.rect.y))
screen.blit(self.render, (self.rect.x, self.rect.y))
pos = pygame.mouse.get_pos()
if self.rect.collidepoint(pos):
self.box.set_alpha(100)
self.box.fill((255, 255, 255))
if pygame.mouse.get_pressed()[0] == 1 and self.clicked == False:
self.clicked = True
if pygame.mouse.get_pressed()[0] == 0:
self.clicked = False
else:
self.box.set_alpha(0)
return self.clicked
b = Button("placeholder text", 100, 100)
while True:
clock.tick(30)
events = pygame.event.get()
for event in events:
if event.type == pygame.QUIT:
pygame.quit()
sys.exit()
screen.fill('blue')
b.text = "new text"
b.draw()
pygame.display.update()
您必須再次渲染文本。 向 class 添加一個更新文本的方法。 更新高亮后繪制文本和框:
class Button():
def __init__(self, text, x, y):
self.rect = pygame.Rect(x, y, 0, 0)
self.updateText(text)
self.clicked = False
def updateText(self, text):
self.text = text
self.render = font.render(self.text, True, 'white')
self.text_width = self.render.get_width()
self.text_height = self.render.get_height()
self.box = pygame.Surface((self.text_width, self.text_height))
self.rect = self.render.get_rect(topleft = self.rect.topleft)
def draw(self):
pos = pygame.mouse.get_pos()
if self.rect.collidepoint(pos):
self.box.set_alpha(100)
self.box.fill((255, 255, 255))
if pygame.mouse.get_pressed()[0] == 1 and self.clicked == False:
self.clicked = True
if pygame.mouse.get_pressed()[0] == 0:
self.clicked = False
else:
self.box.set_alpha(0)
screen.blit(self.box, (self.rect.x, self.rect.y))
screen.blit(self.render, (self.rect.x, self.rect.y))
return self.clicked
調用updateText
:
b.text = "New text"
b.updateText("New text")
正如@Rabbid76 所說:
您必須再次渲染文本
您還可以使用@property
裝飾器來更輕松地更改文本:
class Button():
render: pygame.font.Font
text_width: int
text_height: int
box: pygame.Surface
rect: pygame.Rect
def __init__(self, text, x, y):
self._text = ""
self.text = text
self.clicked = False
@property
def text(self):
return self._text
@text.setter
def text(self, value):
self._text = value
self.render = font.render(self.text, True, 'white')
self.text_width = self.render.get_width()
self.text_height = self.render.get_height()
self.box = pygame.Surface((self.text_width, self.text_height))
self.box.set_alpha(0)
screen.blit(self.box, (x, y))
self.rect = self.render.get_rect()
self.rect.topleft = (x, y)
# Rest of your code goes here
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