增加一个带有红宝石/丝瓜窗口的屏幕上计数器

Question

我正在尝试做一个非常简单的点击计数器，我被困在让点击计数器增加，无论是在屏幕上还是在代码本身。

require 'rubygems'
require 'gosu'

module ZOrder
    BACKGROUND, MIDDLE, TOP = *0..2
end

WIN_WIDTH = 640
WIN_HEIGHT = 400

class GameWindow < Gosu::Window
    def initialize
        super(WIN_WIDTH, WIN_HEIGHT, false)
        @background = Gosu::Color::WHITE
        @button_font = Gosu::Font.new(20)
        @info_font = Gosu::Font.new(15)
    end

    def needs_cursor?
        true
    end

    def draw
        Gosu.draw_rect(0, 0, WIN_WIDTH, WIN_HEIGHT, @background, ZOrder::BACKGROUND, mode=:default)

        Gosu.draw_rect(50, 50, 100, 50, Gosu::Color::GREEN, ZOrder::MIDDLE, mode=:default)
        Gosu.draw_rect(50, 150, 100, 50, Gosu::Color::GREEN, ZOrder::MIDDLE, mode=:default)

        @button_font.draw("Click me", 65, 65, ZOrder::TOP, 1.0, 1.0, Gosu::Color::BLACK)
        @button_font.draw("Reset", 75, 165, ZOrder::TOP, 1.0, 1.0, Gosu::Color::BLACK)

        @info_font.draw("Clicks: #{counter}", 160, 50, ZOrder::TOP, 1.0, 1.0, Gosu::Color::BLACK)
    end

    def counter
        i += 1
        i
    end

    def mouse_over_button?(mouse_x, mouse_y)
        if ((mouse_x > 50 and mouse_x < 150) and (mouse_y > 50 and mouse_y < 100))
          true
        else
          false
        end
    end

    def button_down(id)

        case id
        when Gosu::MsLeft
          if mouse_over_button?(mouse_x, mouse_y)
            counter
          else
            counter
          end
        end
    end


end

GameWindow.new.show

我知道，我的问题很可能是‘计数器’函数和'button_down‘函数，但我一直无法找到如何使它工作。任何帮助都将不胜感激，谢谢。

Answer 1

你差点就有了！您需要添加@counter = 0来初始化。然后将您的def counter更改为如下所示

def counter
    @counter += 1 
end

要使您的重置按钮正常工作，我们现在可以进行另一个名为def reset的过程，如下所示

def reset
    @counter = 0  
end

然后，要使其全部工作，请将def mouse_over_button?(mouse_x, mouse_y)更改为：

def mouse_over_button?(mouse_x, mouse_y)
    if  ((mouse_x > 50 and mouse_x < 150) and (mouse_y > 50 and mouse_y < 100))
      return_value = 1
      return return_value
    elsif ((mouse_x > 50 and mouse_x < 150) and (mouse_y > 150 and mouse_y < 200))
      return_value = 2
      return return_value
    end
end

最后，将def button_down(id)更改为：

def button_down(id)
    case id
    when Gosu::MsLeft
     if mouse_over_button?(mouse_x, mouse_y) == 1
        counter
      elsif  mouse_over_button?(mouse_x, mouse_y) == 2
        reset
      end
    end
end

所有正确的想法都在那里！干得好！如果你不知道为什么这样做，请让我知道，我很高兴进一步解释！希望我有所帮助:)