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，它允许我绘制矩形，但GameObject的点击事件没有注册。以下是该类代码的几段代码：

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rect设置为图像以便注册鼠标事件，还是有其他方法可以拖动此框？

Answer 1

我是否需要将rect设置为图像以便注册鼠标事件，还是有其他方法可以拖动此框？

无需图片。解决方案：

注意：

您已经使用event来获取MOUSEMOTION，因此请使用事件的事件数据：.pos和.button。
使用Color类作为单个变量存储：

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

注意：我保留了一些稍微冗长的代码以便于阅读，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)

python中的python单击事件范围问题

1 个答案: