python - wx.Python : How can I draw some lines into wx. 静态框

Question

你好，我想在静态框内绘制一些彩色线条，我使用了 onpaint 方法，但线条没有出现在静态框内，然后我尝试创建一条静态线，这有效但我无法更改静态线的颜色。有没有其他方法可以使用 onpaint 方法或其他方法来显示线条，我该怎么做？

这是一个示例代码:

import wx

class MainPanel(wx.Panel):
    def __init__(self, parent):
        wx.Panel.__init__(self, parent=parent)
        self.frame = parent

        wx.StaticBox(self, -1, 'Example', (5, 30), size=(290, 185))

        self.Bind(wx.EVT_PAINT, self.OnPaint)

        #self.line = wx.StaticLine(self,-1, (25, 150), (100,1))
        #self.line.SetForegroundColour(("blue"))

    def OnPaint(self, event):
        dc = wx.PaintDC(self)
        dc.DrawLine(50, 10, 80, 10)
        dc.DrawLine(50, 140, 80, 140)
        dc.DrawLine(50, 300, 80, 300)

class MainFrame(wx.Frame): 

    def __init__(self):
        wx.Frame.__init__(self, None, wx.ID_ANY, "Window",size=(305,430))
        panel = MainPanel(self)
        self.CenterOnParent()

if __name__ == "__main__":
    app = wx.App(False)
    frame = MainFrame()
    frame.Show()
    app.MainLoop()

Answer 1

问题是您是在面板而不是静态框上绘画。您可以创建一个自定义静态框并执行您喜欢的操作，然后像这样调用原始的 wx.StaticBox.OnPaint:

# custom StaticBox class
class MyStaticBox(wx.StaticBox):
  def __init__(self, *args, **kwargs):
    super(MyStaticBox, self).__init__(*args, **kwargs)
    self.Bind(wx.EVT_PAINT, self.OnPaint)

  def OnPaint(self, event):
    # do what you want here
    width, height = self.GetSize()
    dc = wx.PaintDC(self)
    dc.Clear()
    dc.SetPen(wx.Pen('#4285F4'))
    dc.DrawLine(0, 0, width, height)
    dc.DrawLine(width, 0, 0, height)
    # after you finished, call the StaticBox OnPaint
    super(MyStaticBox, self).OnPaint(event)

例如:

import wx

# custom StaticBox class
class MyStaticBox(wx.StaticBox):
  def __init__(self, *args, **kwargs):
    super(MyStaticBox, self).__init__(*args, **kwargs)
    self.Bind(wx.EVT_PAINT, self.OnPaint)

  def OnPaint(self, event):
    # do what you want here
    width, height = self.GetSize()
    dc = wx.PaintDC(self)
    dc.Clear()
    dc.SetPen(wx.Pen('#4285F4'))
    dc.DrawLine(0, 0, width, height)
    dc.DrawLine(width, 0, 0, height)
    # after you finished, call the StaticBox OnPaint
    super(MyStaticBox, self).OnPaint(event)

class MainPanel(wx.Panel):
    def __init__(self, parent):
        wx.Panel.__init__(self, parent=parent)
        self.frame = parent

        MyStaticBox(self, -1, 'Example', (5, 30), size=(290, 185))

        #self.line = wx.StaticLine(self,-1, (25, 150), (100,1))
        #self.line.SetForegroundColour(("blue"))

class MainFrame(wx.Frame): 

    def __init__(self):
        wx.Frame.__init__(self, None, wx.ID_ANY, "Window",size=(305,430))
        panel = MainPanel(self)
        self.CenterOnParent()

if __name__ == "__main__":
    app = wx.App(False)
    frame = MainFrame()
    frame.Show()
    app.MainLoop()