Kivy：如何实现Label双击触发函数？替代on_ref_press方案咨询

Got it, so you want to trigger your function only when the labeled reference is double-clicked, instead of the default single-click from on_ref_press? Let's fix this—Kivy doesn't have a built-in double-click ref event, but we can build it with a custom Label subclass.

Step 1: Create a Custom Double-Click Ref Label #

We'll subclass Label (or your existing MyLabel) to track click timings and check for double taps on ref text:

from kivy.uix.label import Label
from kivy.clock import Clock
from functools import partial

class DoubleClickRefLabel(Label):
    def __init__(self, **kwargs):
        super().__init__(**kwargs)
        self.last_touch_time = 0
        self.last_ref = None
        # Adjust this threshold (in seconds) to fit your needs
        self.double_click_threshold = 0.3

    def on_touch_down(self, touch):
        if self.collide_point(*touch.pos):
            # Get the ref at the touched position
            ref = self.get_ref_at_pos(touch.pos)
            if ref:
                current_time = Clock.get_time()
                # Check if this is a double-click on the same ref
                if (current_time - self.last_touch_time) <= self.double_click_threshold and self.last_ref == ref:
                    # Trigger the double-click event
                    if hasattr(self, 'on_ref_double_press'):
                        self.on_ref_double_press(ref)
                    # Reset to prevent multiple triggers
                    self.last_touch_time = 0
                    self.last_ref = None
                else:
                    # Store first click data
                    self.last_touch_time = current_time
                    self.last_ref = ref
                return True
        # Pass other touches to the parent implementation
        return super().on_touch_down(touch)

Step 2: Replace Your Existing Label with the Custom One #

Swap out MyLabel for DoubleClickRefLabel (if MyLabel has custom logic, make DoubleClickRefLabel inherit from MyLabel instead of Label), and bind your function to the new on_ref_double_press event:

layout.add_widget(
    DoubleClickRefLabel(
        text='[ref=world]' + str('Test') + '[/ref]', 
        padding_x=10, 
        size_hint_x=.35, 
        halign='left', 
        markup=True,
        on_ref_double_press=partial(self.xyz, 10)
    )
)

Key Details to Note #

• get_ref_at_pos(touch.pos): This Kivy Label method lets us check if the touch is on a marked ref text, so we don't trigger the function for clicks outside the ref.
• Double-Click Threshold: The 0.3 second value is a standard default, but you can tweak double_click_threshold to make the double-click detection more or less sensitive.
• Inheriting from Your Custom Label: If MyLabel has its own overrides (like custom styling or touch handling), change the class definition to class DoubleClickRefLabel(MyLabel): to preserve that functionality.

内容的提问来源于stack exchange，提问作者macson taylor