pygame中的python点击事件范围问题

Question

我使用 python pygame 库创建了一个 GameObject 类，它在屏幕上绘制一个矩形。 我想集成一个事件处理程序，它允许我在周围绘制矩形，但是游戏对象的单击事件没有注册。以下是该类中的几段代码:

def on_event(self, event):

    if event.type == pygame.MOUSEBUTTONDOWN:
        print "I'm a mousedown event!"
        self.down = True
        self.prev_x=pygame.mouse.get_pos(0)
        self.prev_y=pygame.mouse.get_pos(1)

    elif event.type == pygame.MOUSEBUTTONUP and event.button == 1:
        self.down = False

def on_draw(self, surface):

    #paints the rectangle the particular color of the square
    pygame.draw.rect(surface, pygame.Color(self.red, self.green, self.blue), self.geom)`

我是否需要将矩形变成图像以便注册鼠标事件，或者是否有其他方法可以拖动此框？

Answer 1

Do I need to make the rect into an image for the mouse events to register, or is there some other way I can drag this box around?

无需图像。解决方案:

注意:

1. 您已经使用事件来获取 MOUSEMOTION，因此请使用事件的数据:事件中的 .pos 和 .button。

2. 使用Color存储为单个变量的类:

   self.color_bg = 颜色(“蓝色”)self.color_fg = 颜色(20,20,20)打印 self.color_bg.r、self.color_bg.g、self.color_bg.b

注意:我保留了一些稍微详细一点的代码，以便于阅读，例如:你可以这样做:

# it uses
x,y = event.pos
if b.rect.collidepoint( (x,y) ):
# you could do (the same thing)
if b.rect.collidepoint( event.pos* ):

解决方案:

import pygame
from pygame.locals import *
from random import randint

class Box(object):
    """simple box, draws rect and Color"""
    def __init__(self, rect, color):
        self.rect = rect
        self.color = color
    def draw(self, surface):
        pygame.draw.rect(surface, self.color, self.rect)

    class Game(object):
    def __init__(self):
        # random loc and size boxes
        # target = box to move
        self.target = None

        for i in range(5):
            x,y = randint(0, self.width), randint(0, self.height)
            size = randint(20, 200)

            r = Rect(0,0,0,0)
            # used 0 because: will be using propery, but have to create it first
            r.size = (size, size)
            r.center = (x, y)
            self.boxes.append( Box(r, Color("red") ))

    def draw(self):
        for b in self.boxes: b.draw()

    def on_event(self, event):
        # see: http://www.pygame.org/docs/ref/event.html

        if event.type == MOUSEBUTTONDOWN and event.button = 1:
            # LMB down = target if collide
            x,y = event.pos
            for b in self.boxes:
                if b.rect.collidepoint( (x,y) ): self.target = b

        elif event.type == MOUSEBUTTONUP and event.button = 1:
            # LMB up : untarget
            self.target = None

        elif event.type == MOUSEMOTION:
            x,y = event.pos
            # is a valid Box selected?
            if self.target is not None:
                self.target.rect.center = (x,y)