WrapSize 和 Scrollbar :在启动时未绘制的小部件以后不会绘制 [英] WrapSize and Scrollbar : widgets not drawn at startup won't draw later

问题描述

使用来自仅带有垂直滚动条和 WrapSizer 的 ScrolledPanel 的公认解决方案，这是一种使用垂直滚动条将一些自定义 MyControl 放入 WrapSizer 的方法:

By using the accepted solution from ScrolledPanel with vertical scrollbar only and WrapSizer, here is a way of putting some custom MyControl into WrapSizer with a vertical scrollbar :

不幸的是，即使在移动滚动条之后，启动时未绘制的项目也不会在以后绘制.这里只绘制了前 9 个按钮(在 20 个中):

Unfortunately, the items that are not drawn at startup won't draw later, even after moving the scrollbar. Here only the first 9 buttons (among 20) are drawn :

import wx
import wx.lib.scrolledpanel as scrolled

class MyControl(wx.PyControl):
    def __init__(self, parent, i):
        wx.PyControl.__init__(self, parent, wx.ID_ANY, wx.DefaultPosition, size=(100,100)) 
        wx.Button(self, wx.ID_ANY, "btn %d" % i, (0,0), (50,50), 0)
        # some other things here 

class MyPanel(scrolled.ScrolledPanel):
    def __init__(self, parent):
        scrolled.ScrolledPanel.__init__(self, parent, style=wx.VSCROLL)
        self.sizer = wx.WrapSizer()
        self.SetupScrolling(scroll_x = False)
        for i in range(1, 20):
            btn = MyControl(self, i)
            self.sizer.Add(btn, 0, wx.ALL, 10)
        self.SetSizer(self.sizer)
        self.Bind(wx.EVT_SIZE, self.onSize)

    def onSize(self, evt):
        size = self.GetSize()
        vsize = self.GetVirtualSize()
        self.SetVirtualSize((size[0], vsize[1]))        

app = wx.App(redirect=False)
frame = wx.Frame(None, size=(400,400))
MyPanel(frame)
frame.Show()
app.MainLoop()

如何在这样的WrapSizer中正确绘制所有项目?

How to correctly draw all the items in such a WrapSizer ?

推荐答案

我尝试在 MyControl 类中使用 sizer 并且显示所有按钮:

I tried using a sizer in the MyControl class and all the buttons were displayed:

class MyControl(wx.PyControl):
    def __init__(self, parent, i):
    wx.PyControl.__init__(self, parent, wx.ID_ANY, wx.DefaultPosition, size=(100,100))

    # Just saving the button in a variable
    btn = wx.Button(self, wx.ID_ANY, "btn %d" % i, (0,0), (50,50), 0)

    # Creating sizer and placing the button in sizer
    sizer = wx.BoxSizer()
    sizer.Add(btn)
    self.SetSizer(sizer)

您可以随意使用 sizer 参数，让它们以您想要的方式填充空间.这是您正在寻找的解决方案类型吗?

You can mess around with the sizer arguments to make them fill up the space how you want it. Is this the type of solution you were looking for?

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