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import math
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from abc import ABC, abstractmethod
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from typing import TYPE_CHECKING, Tuple
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if TYPE_CHECKING:
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from FlowScroll.core.config import GlobalConfig
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class ScrollStrategy(ABC):
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@abstractmethod
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def calculate_scroll_speed(
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self,
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dx: float,
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dy: float,
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distance: float,
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config: "GlobalConfig",
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platform_multiplier: float,
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reverse_x: bool = False,
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reverse_y: bool = False,
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) -> Tuple[float, float]:
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"""
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计算滚动速度。
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:param dx: X轴位移
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:param dy: Y轴位移
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:param distance: 距离原点的直线距离
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:param config: 全局配置对象 (GlobalConfig)
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:param platform_multiplier: 平台相关的滚动乘数 (来自 system_platform)
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:param reverse_x: 是否反转横向滚动
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:param reverse_y: 是否反转纵向滚动
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:return: (scroll_x, scroll_y)
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"""
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pass
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class PowerCurveStrategy(ScrollStrategy):
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"""
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幂函数曲线策略 (目前项目的默认行为)
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公式: speed = (distance - dead_zone)^sensitivity * multiplier * speed_factor
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"""
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def calculate_scroll_speed(
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self,
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dx: float,
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dy: float,
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distance: float,
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config: "GlobalConfig",
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platform_multiplier: float,
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reverse_x: bool = False,
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reverse_y: bool = False,
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) -> Tuple[float, float]:
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if distance <= config.dead_zone:
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return 0.0, 0.0
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eff_dist = distance - config.dead_zone
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speed_scalar = (
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math.pow(eff_dist, config.sensitivity)
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* platform_multiplier
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* config.speed_factor
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)
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# 将标量速度按方向分配到 X 和 Y 轴
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scroll_x = (dx / distance) * speed_scalar
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scroll_y = (
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(dy / distance) * speed_scalar * -1
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) # 反转Y轴因为鼠标坐标向下为正，滚轮向上为正
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if reverse_x:
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scroll_x = -scroll_x
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if reverse_y:
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scroll_y = -scroll_y
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return scroll_x, scroll_y
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# 目前先使用原版算法
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default_scroll_strategy: ScrollStrategy = PowerCurveStrategy()
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