问题描述
我将从简单地复制并粘贴大量代码开始：
# Libraries #
import pygame
from pygame.locals import *
import ResolutionMenu
# Classes #
class GuiSettings:
def __init__(self):
self.TextSize = 20
self.button_color = (35,65,145)
self.button_color_hover = (70,105,150)
class Button():
def __init__(self,x,y,width,height,outline,settings,text = "",action = None):
self.x = x
self.y = y
self.width = width
self.height = height
self.text = text
self.settings = settings
self.action = action
self.outline = outline
def draw(self,screen,outline = None):
if self.outline:
pygame.draw.rect(screen,self.outline,(self.x - 2,self.y - 2,self.width + 4,self.height + 4),0)
color = self.settings.button_color if not self.isOver(pygame.mouse.get_pos()) else self.settings.button_color_hover
pygame.draw.rect(screen,color,(self.x,self.y,self.width,self.height),0)
if self.text != "":
font = pygame.font.SysFont('segoeuisemibold',self.settings.TextSize)
text = font.render(self.text,1,(0,0))
screen.blit(text,(self.x + (self.width / 2 - text.get_width() / 2),self.y + (self.height / 2 - text.get_height() / 2)))
def update(self,events):
for event in events:
if event.type == pygame.MOUSEBUTTONDOWN and self.isOver(pygame.mouse.get_pos()) and self.action:
self.action()
def isOver(self,pos):
if pos[0] > self.x and pos[0] < self.x + self.width:
if pos[1] > self.y and pos[1] < self.y + self.height:
return True
return False
# Variables #
settings = GuiSettings()
Click = False
Clock = pygame.time.Clock()
H,W = ResolutionMenu.resolution
pygame.init()
pygame.display.set_caption("Main Menu")
font = pygame.font.SysFont(None,settings.TextSize)
screen = pygame.display.set_mode((ResolutionMenu.resolution))
# Functions #
def draw_text_center(text,font,colour,surface):
textobj = font.render(text,colour)
textrect = textobj.get_rect()
textrect.center = ((H / 2),(W / 10))
surface.blit(textobj,textrect)
def draw_text(text,surface,XandY):
textobj = font.render(text,colour)
textrect = textobj.get_rect()
textrect.topleft = (XandY)
surface.blit(textobj,textrect)
def MainMenu():
while True:
if ResolutionMenu.resolution == (800,600):
screen.fill ((0,0))
draw_text_center("Main Menu Navigation",(255,255,255),screen)
mx,my = pygame.mouse.get_pos()
button1 = pygame.Rect((W/10),(H/5),(W/3),(H/15))
button2 = pygame.Rect((W/10),(H/2),(H/15))
if button1.collidepoint((mx,my)):
if Click:
game()
if button2.collidepoint((mx,my)):
if Click:
OptionsMenu()
pygame.draw.rect(screen,0),button1)
pygame.draw.rect(screen,),button2)
Click = False
for event in pygame.event.get():
if event.type == QUIT:
pygame.quit()
if event.type == KEYDOWN:
if event.key == K_ESCAPE:
pygame.quit()
if event.type == MOUSEBUTTONDOWN:
if event.button == 1:
Click = True
pygame.display.update()
Clock.tick(60)
def game():
running = True
while running:
screen.fill((0,0))
draw_text('Test 1',(20,20))
for event in pygame.event.get():
if event.type == QUIT:
pygame.quit()
sys.exit()
if event.type == KEYDOWN:
if event.key == K_ESCAPE:
running = False
pygame.display.update()
Clock.tick(60)
def OptionsMenu():
screen = pygame.display.set_mode((800,600))
settings = GuiSettings()
buttons = [
Button(100,150,200,50,"Set Text Size: 14",lambda: settings.__setattr__('TextSize',14)),Button(500,"Set Text Size: 16",16)),Button(100,300,"Set Text Size: 18",18)),"Set Text Size: 20",20))
]
running = True
while running:
events = pygame.event.get()
for event in events:
if event.type == pygame.QUIT:
pygame.quit()
return
if event.type == KEYDOWN:
if event.key == K_ESCAPE:
running = False
for button in buttons:
button.update(events)
screen.fill((100,100,100))
for button in buttons:
button.draw(screen)
pygame.display.flip()
MainMenu()
因此，正如您所看到的，最近我一直在尝试制作游戏的主菜单导航面板，到目前为止一切进展顺利。但是，我偶然发现了一个问题。
因此，问题是：我创建了一个类，其中包含文本大小，按钮颜色和按钮悬停颜色的设置（当鼠标pos处于按钮区域内时，按钮的颜色将改变）。
class GuiSettings:
def __init__(self):
self.TextSize = 20
self.button_color = (35,150)
当我位于OptionMenu（）函数内部时，此方法完全可以正常工作，但是在中断该函数时，通过按esc键并返回MainMenu（）函数，可以使“主菜单导航”文本的文本大小（下面的代码）也不会更改。我不确定为什么在选项菜单上会看到这种情况，使用lambda函数来更改文本大小的值。
buttons = [
Button(100,20))
]
对不起，这是一个很长的问题，谢谢您的阅读，我希望比我更好的人能为我提供帮助。
解决方法
您可以在主应用程序循环之前使用字体大小settings.TextSize创建字体对象。之后更改font时，此settings.TextSize对象不会发生神奇的变化。字体大小用于光栅化字形。离开功能OptionsMenu后，您需要创建一个具有新大小的新字体对象。
此外，由于font和settings是全局命名空间中的变量，因此您需要使用global statement。
def MainMenu():
global font # font is a variable in global namespace
while True:
if ResolutionMenu.resolution == (800,600):
# [...]
if button2.collidepoint((mx,my)):
if Click:
OptionsMenu()
# create new font with new size
font = pygame.font.SysFont(None,settings.TextSize)
# [...]
def OptionsMenu():
global settings # settings is a variable in global namespace
screen = pygame.display.set_mode((800,600))
# settings = GuiSettings() # <--- DELETE use the existing object instead
# [...]