pygame实现非图片按钮效果

本文实例为大家分享了pygame实现非图片按钮效果的具体代码，供大家参考，具体内容如下

按钮类程序

# -*- coding=utf-8 -*-
import threading
import pygame
from pygame.locals import MOUSEBUTTONDOWN

class BFControlId(object):
_instance_lock = threading.Lock()
def __init__(self):
 self.id = 1

@classmethod
def instance(cls, *args, **kwargs):
 if not hasattr(BFControlId, "_instance"):
  BFControlId._instance = BFControlId(*args, **kwargs)
 return BFControlId._instance

def get_new_id(self):
 self.id += 1
 return self.id

CLICK_EFFECT_TIME = 100
class BFButton(object):
def __init__(self, parent, rect, text='Button', click=None):
 self.x,self.y,self.width,self.height = rect
 self.bg_color = (225,225,225)
 self.parent = parent
 self.surface = parent.subsurface(rect)
 self.is_hover = False
 self.in_click = False
 self.click_loss_time = 0
 self.click_event_id = -1
 self.ctl_id = BFControlId().instance().get_new_id()
 self._text = text
 self._click = click
 self._visible = True
 self.init_font()

def init_font(self):
 font = pygame.font.Font(None, 28)
 white = 100, 100, 100
 self.textImage = font.render(self._text, True, white)
 w, h = self.textImage.get_size()
 self._tx = (self.width - w) / 2
 self._ty = (self.height - h) / 2

@property
def text(self):
 return self._text

@text.setter
def text(self, value):
 self._text = value
 self.init_font()

@property
def click(self):
 return self._click

@click.setter
def click(self, value):
 self._click = value

@property
def visible(self):
 return self._visible

@visible.setter
def visible(self, value):
 self._visible = value

def update(self, event):
 if self.in_click and event.type == self.click_event_id:
  if self._click: self._click(self)
  self.click_event_id = -1
  return

x, y = pygame.mouse.get_pos()
 if x > self.x and x < self.x + self.width and y > self.y and y < self.y + self.height:
  self.is_hover = True
  if event.type == MOUSEBUTTONDOWN:
   pressed_array = pygame.mouse.get_pressed()
   if pressed_array[0]:
    self.in_click = True
    self.click_loss_time = pygame.time.get_ticks() + CLICK_EFFECT_TIME
    self.click_event_id = pygame.USEREVENT+self.ctl_id
    pygame.time.set_timer(self.click_event_id,CLICK_EFFECT_TIME-10)
 else:
  self.is_hover = False

def draw(self):
 if self.in_click:
  if self.click_loss_time < pygame.time.get_ticks():
   self.in_click = False
 if not self._visible:
  return
 if self.in_click:
  r,g,b = self.bg_color
  k = 0.95
  self.surface.fill((r*k, g*k, b*k))
 else:
  self.surface.fill(self.bg_color)
 if self.is_hover:
  pygame.draw.rect(self.surface, (0,0,0), (0,0,self.width,self.height), 1)
  pygame.draw.rect(self.surface, (100,100,100), (0,0,self.width-1,self.height-1), 1)
  layers = 5
  r_step = (210-170)/layers
  g_step = (225-205)/layers
  for i in range(layers):
   pygame.draw.rect(self.surface, (170+r_step*i, 205+g_step*i, 255), (i, i, self.width - 2 - i*2, self.height - 2 - i*2), 1)
 else:
  self.surface.fill(self.bg_color)
  pygame.draw.rect(self.surface, (0,0,0), (0,0,self.width,self.height), 1)
  pygame.draw.rect(self.surface, (100,100,100), (0,0,self.width-1,self.height-1), 1)
  pygame.draw.rect(self.surface, self.bg_color, (0,0,self.width-2,self.height-2), 1)

self.surface.blit(self.textImage, (self._tx, self._ty))

主要给按钮实现了：

1.鼠标悬停效果
2.按钮点击效果
3.文本绘制效果
4.点击后事件触发效果
5.按钮的隐藏和显示控制

使用方法：

btn = BFButton(my_surface,my_rect,text=my_label,click=my_method)
在事件响应处
btn.update(event)
在绘图处
btn.draw()

下面附一个例子

# -*- coding=utf-8 -*-
import pygame
from bf_button import BFButton

pygame.init()
screencaption = pygame.display.set_caption('bf control')
screen = pygame.display.set_mode((400,400))

def do_click1(btn):
pygame.display.set_caption('i click ％s,ctl id is ％s' ％ (btn._text,btn.ctl_id))
btn.text = 'be click'

def do_click2(btn):
btn.visible = False

def do_click3(btn):
pygame.quit()
exit()

button1 = BFButton(screen, (120,100,160,40))
button1.text = 'Play'
button1.click = do_click1
button2 = BFButton(screen, (120,180,160,40),text='Hide',click=do_click2)
button3 = BFButton(screen, (120,260,160,40),text='Quit',click=do_click3)

while True:
for event in pygame.event.get():
 if event.type == pygame.QUIT:
   pygame.quit()
   exit()
 button1.update(event)
 button2.update(event)
 button3.update(event)

screen.fill((255,255,255))
button1.draw()
button2.draw()
button3.draw()

pygame.display.update()

例子里有两个按钮

第一个按钮事件是修改界面标题和按钮上的文字
第二个按钮事件是隐藏自己
第三个按钮事件是退出

为方便按钮管理，其实可以定一个ButtonGroup类

class BFButtonGroup(object):
def __init__(self):
 self.btn_list = []

def add_button(self, button):
 self.btn_list.append(button)

def make_button(self, screen, rect, text='Button', click=None):
 button = BFButton(screen, rect,text=text,click=click)
 self.add_button(button)

def update(self, event):
 for button in self.btn_list: button.update(event)

def draw(self):
 for button in self.btn_list: button.draw()

这样使用的时候只需要对ButtonGroup进行update和draw

# -*- coding=utf-8 -*-
import pygame
from bf_button import BFButton,BFButtonGroup

pygame.init()
screencaption = pygame.display.set_caption('bf control')
screen = pygame.display.set_mode((400,400))

def do_click1(btn):
pygame.display.set_caption('i click ％s,ctl id is ％s' ％ (btn._text,btn.ctl_id))
btn.text = 'be click'

def do_click2(btn):
btn.visible = False

def do_click3(btn):
pygame.quit()
exit()

btn_group = BFButtonGroup()
btn_group.make_button(screen, (120,100,160,40),text='Play',click=do_click1)
btn_group.make_button(screen, (120,180,160,40),text='Hide',click=do_click2)
btn_group.make_button(screen, (120,260,160,40),text='Quit',click=do_click3)

while True:
for event in pygame.event.get():
 if event.type == pygame.QUIT:
   pygame.quit()
   exit()
 btn_group.update(event)

screen.fill((255,255,255))
btn_group.draw()

pygame.display.update()

来源：https://blog.csdn.net/zhangenter/article/details/89609946