wxPython能否管理按钮悬停颜色？适配深色主题开发需求

原生wx.Button的悬停样式受系统或内置主题控制，直接通过EVT_ENTER_WINDOW/EVT_LEAVE_WINDOW修改背景色不会生效——因为控件会自动重绘原生样式。以下两种方案可实现自定义悬停颜色：

方案一：重载按钮的绘制逻辑 #

完全接管按钮的绘制过程，手动控制正常和悬停状态的样式：

import wx

class AppButton(wx.Button):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.SetLabel('Test')
        self.normal_bg = '#131313'
        self.hover_bg = '#2a2a2a'
        self.fg_color = 'white'
        self.SetOwnBackgroundColour(self.normal_bg)
        self.SetOwnForegroundColour(self.fg_color)
        self.SetPosition((100,100))
        
        self.is_hover = False
        self.Bind(wx.EVT_ENTER_WINDOW, self.OnEnter)
        self.Bind(wx.EVT_LEAVE_WINDOW, self.OnLeave)
        self.Bind(wx.EVT_PAINT, self.OnPaint)

    def OnEnter(self, event):
        self.is_hover = True
        self.Refresh()
        event.Skip()

    def OnLeave(self, event):
        self.is_hover = False
        self.Refresh()
        event.Skip()

    def OnPaint(self, event):
        dc = wx.PaintDC(self)
        rect = self.GetClientRect()
        
        bg_color = self.hover_bg if self.is_hover else self.normal_bg
        dc.SetBrush(wx.Brush(bg_color))
        dc.SetPen(wx.Pen(bg_color))
        dc.DrawRectangle(rect)
        
        dc.SetTextForeground(self.fg_color)
        dc.DrawLabel(self.GetLabel(), rect, wx.ALIGN_CENTER)

class Example(wx.Frame):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.SetSize(300,300)
        self.SetBackgroundColour('#151719')
        self.Center()
        self.initUI()
    
    def initUI(self):
        panel = wx.Panel(self)
        self.button = AppButton(panel)
        
if __name__ == '__main__':
    app = wx.App()
    ex = Example(None)
    ex.Show()
    app.MainLoop()

方案二：使用wx.lib.buttons的GenButton #

GenButton是纯Python实现的按钮控件，支持直接设置悬停属性，无需手动处理绘制：

import wx
from wx.lib.buttons import GenButton

class AppButton(GenButton):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.SetLabel('Test')
        self.SetBackgroundColour('#131313')
        self.SetForegroundColour('white')
        # 直接设置悬停样式
        self.hoverBackground = '#2a2a2a'
        self.hoverForeground = 'white'
        self.SetPosition((100,100))
        self.SetUseFocusIndicator(False)  # 可选，移除默认焦点框

class Example(wx.Frame):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.SetSize(300,300)
        self.SetBackgroundColour('#151719')
        self.Center()
        self.initUI()
    
    def initUI(self):
        panel = wx.Panel(self)
        self.button = AppButton(panel)
        
if __name__ == '__main__':
    app = wx.App()
    ex = Example(None)
    ex.Show()
    app.MainLoop()

内容的提问来源于stack exchange，提问作者Juicy Apricot