Kivy Python 右键单击

Question

我正在使用 Kivy 使用按钮小部件制作扫雷游戏。我希望能够根据鼠标单击是鼠标左键单击还是鼠标右键单击来执行不同的操作。有谁能够帮我？

下面是我的 Cell 类和导入的模块。

请注意，Cell.onPressed() 是按下按钮时调用的函数。

import kivy
from kivy.config import Config

Config.set('input', 'mouse', 'mouse,disable_multitouch')

from random import randint
from kivy.app import App
from kivy.uix.button import Button
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.relativelayout import RelativeLayout
from kivy.uix.anchorlayout import AnchorLayout

width = 10
height = 10
bombs = 5
size = 60

class Cell():  

  def __init__(self):
    self.isBomb = False
    self.isVisible = False
    self.neighbors = None
    self.location = []
    self.button = Button(size = (size, size), size_hint = (None, None))
    self.button.bind(on_press = self.onPressed)

  def build(self, x, y):
    self.location = [x, y]
    self.count_neighbors()

  def onPressed(self, instance):
    #if left_click == True:    
    self.isVisible = True
    self.button.text = str(self.neighbors)
    if self.neighbors == 0:
      for i in range(-1, 2):
        for j in range(-1, 2):
          if (0 <= self.location[0] + i < width) and (0 <= self.location[1] + j < height):
            if grid[self.location[0] + i][self.location[1] + j].isVisible == False:
              grid[self.location[0] + i][self.location[1] + j].onPressed(instance)    
    #if right_click == True:
      #Toggle state


  def count_neighbors(self):
    if self.isBomb == False:
      count = 0
      for i in range(-1, 2):
        for j in range(-1, 2):
          if (0 <= self.location[0] + i < width) and (0 <= self.location[1] + j < height):
            if grid[self.location[0] + i][self.location[1] + j].isBomb == True:
              count += 1
      self.neighbors = count

class TestApp(App):

  def build(self):
    root = AnchorLayout(anchor_x = 'center', anchor_y = 'center')
    grid_root = RelativeLayout(size = (width * size, height * size), size_hint = (None, None))
    layout = []
    for i in range(height):
      layout.append(BoxLayout(orientation='horizontal', size_hint = (.8, .8), pos = (0, (height - 1) * size - i * size)))
      for j in range(width):    
        layout[i].add_widget(grid[j][i].button)    
      grid_root.add_widget(layout[i])
    root.add_widget(grid_root)
    return root


def init_grid():
  global grid
  grid = [[Cell() for x in range(width)] for y in range(height)]
  for _ in range(bombs):
    while True:
      x = randint(0, height - 1)
      y = randint(0, width - 1)
      if grid[x][y].isBomb == False:
        grid[x][y].isBomb = True
        break  
  for i in range(width):
    for j in range(height):
      grid[j][i].build(j, i)


if __name__ == '__main__':
  init_grid()
  TestApp().run()

Answer 1

您应该绑定on_touch_down 而不是on_press，这样您就可以使用touch 参数：

...
self.button.bind(on_touch_down = self.onPressed)
...

def onPressed(self, instance, touch):
    if touch.button == 'right':
        print("right mouse clicked")
    ...

Answer 2

我得到了一些工作，但它有点 hackish。 我创建了一个继承自 Widget 的新类，并简单地更改了一个名为“mouse”的全局变量

class TouchInput(Widget):

  def on_touch_down(self, touch):
    global mouse
    mouse = touch.button

我创建了一个 TouchInput() 实例并将其添加到我的根布局中

class TestApp(App):

  def build(self):
    root = AnchorLayout(anchor_x = 'center', anchor_y = 'center')
    root_input = TouchInput()
    grid_root = RelativeLayout(size = (width * size, height * size), size_hint = (None, None))
    layout = []
    for i in range(height):
      layout.append(BoxLayout(orientation='horizontal', size_hint = (.8, .8), pos = (0, (height - 1) * size - i * size)))
      for j in range(width):    
        layout[i].add_widget(grid[j][i].button)    
      grid_root.add_widget(layout[i])
    root.add_widget(grid_root)
    root.add_widget(root_input)
    return(root)

现在，只要按下按钮，它就可以检查是右击还是左击。

def onPressed(self, instance):
  if mouse == 'left':
    print('Left!')
  if mouse == 'right':
    print('Right!')

Answer 3

我可以通过创建一个新类来判断按下了什么按钮，如下所示：

from kivy.uix.button import Button 
class ClickableButton(Button):
    def __init__(self,**kwargs):
        super(Button, self).__init__(**kwargs)
        self.mouse_button = None #mouse_button records what button is pressed
        self.bind(on_touch_down = self.callback_touch_down) #set up a function to be called on mouse events
    def callback_touch_down(self, instance, touch):
        self.mouse_button = touch.button #record what button is clicked on touch down on mouse events

ClickableButton 类继承自 Button，因此它可以像普通的 kivy Button 一样使用，如下所示：

from kivy.app import App
def callback(instance):
    print('The <%s> button is being pressed' % instance.mouse_button)

class MyApp(App):  
    def build(self):  
        return ClickableButton(text = "ClickableButton",on_press = callback)

if __name__ == '__main__':
    root = MyApp().run()

现在程序知道按下了哪个特定的 kivy 按钮以及单击了哪个鼠标按钮。 Button.on_touch_down() 函数也不会冒泡到多个实例。