wx.StaticLine doesn't always display

Question

I have a wx.StaticLine separating some buttons in a wx.GridBagSizer. When the window initially draws, the StaticLine does not show up. Sometimes after a long running task (and I move the window around or something, presumably forcing the frame to be redrawn) it will show up out of nowhere. Here is what it looks like:

When window initially draws:

line not showing

After some long running task (or resize):

line showing

I create the line with:

self.m_staticline1 = wx.StaticLine( self, wx.ID_ANY, wx.DefaultPosition, wx.DefaultSize, wx.LI_HORIZONTAL )
gbSizer101.Add( self.m_staticline1, wx.GBPosition( 2, 0 ), wx.GBSpan( 1, 2 ), wx.EXPAND |wx.ALL, 5 )

and at the end of the init I draw with:

self.SetSizer( gbSizer1 )
self.Layout()
gbSizer1.Fit( self )

I'm not sure if this is significant, but here is how I start the application:

app = wx.App(False)
frame = FWHM_Application(None)
frame.Show()
app.MainLoop()

Any ideas why this might be happening and how to make it draw initially?

EDIT: Here is a working sample program demonstrating the issue:

import wx

class Test_Frame ( wx.Frame ):

    def __init__( self, parent ):

        wx.Frame.__init__ ( self, parent, id = wx.ID_ANY, title = u"Test GUI", pos = wx.DefaultPosition, size = wx.Size( -1,-1 ), style = wx.DEFAULT_FRAME_STYLE|wx.TAB_TRAVERSAL )

        self.SetSizeHintsSz( wx.DefaultSize, wx.DefaultSize )

        # Outer container
        gbSizer_outer = wx.GridBagSizer( 4, 3 )
        gbSizer_outer.SetFlexibleDirection( wx.BOTH )
        gbSizer_outer.SetNonFlexibleGrowMode( wx.FLEX_GROWMODE_SPECIFIED )

        # Static box for analysis
        analyzeImageBox = wx.StaticBoxSizer( wx.StaticBox( self, wx.ID_ANY, u"Analyze Single Image" ), wx.VERTICAL )

        # Sizer for button/label layout within static box
        gbSizer_single = wx.GridBagSizer( 0, 0 )
        gbSizer_single.SetFlexibleDirection( wx.BOTH )
        gbSizer_single.SetNonFlexibleGrowMode( wx.FLEX_GROWMODE_SPECIFIED )

        self.analyzeImage = wx.Button( self, wx.ID_ANY, u"Analyze Image", wx.DefaultPosition, wx.Size( 170,45 ), 0 )
        gbSizer_single.Add( self.analyzeImage, wx.GBPosition( 0, 0 ), wx.GBSpan( 1, 2 ), wx.ALL, 5 )

        self.m_staticline1 = wx.StaticLine( self, wx.ID_ANY, wx.DefaultPosition, wx.DefaultSize, wx.LI_HORIZONTAL )
        gbSizer_single.Add( self.m_staticline1, wx.GBPosition( 1, 0 ), wx.GBSpan( 1, 2 ), wx.EXPAND |wx.ALL, 5 )

        self.plotX = wx.Button( self, wx.ID_ANY, u"Plot X", wx.DefaultPosition, wx.Size( 70,35 ), 0 )
        gbSizer_single.Add( self.plotX, wx.GBPosition( 2, 0 ), wx.GBSpan( 1, 1 ), wx.ALL, 5 )

        self.plotY = wx.Button( self, wx.ID_ANY, u"Plot Y", wx.DefaultPosition, wx.Size( 70,35 ), 0 )
        gbSizer_single.Add( self.plotY, wx.GBPosition( 2, 1 ), wx.GBSpan( 1, 1 ), wx.ALL, 5 )


        analyzeImageBox.Add( gbSizer_single, 1, wx.EXPAND, 5 )

        gbSizer_outer.Add( analyzeImageBox, wx.GBPosition( 1, 1 ), wx.GBSpan( 1, 1 ), wx.ALL, 5 )


        self.SetSizer( gbSizer_outer )
        gbSizer_outer.Fit( self )
        self.Layout()

        self.Centre( wx.BOTH )


app = wx.App(False)
frame = Test_Frame(None)
frame.Show()
app.MainLoop()

How are you creating the line? Do manual calls to `.Layout` have any effect? Without seeing code it's hard to tell you why yours is malfunctioning. — g.d.d.c, Jul 18 '14 at 17:11
did you try calling the `layout` function of the panel or the containing `gbSizer1`? — user2963623, Jul 18 '14 at 17:24
I tried calling Layout() on `gbSizer1` (which is the outermost sizer) and on `gbSizer101` (which is the sizer containing the static line) to no avail. — SFBA26, Jul 18 '14 at 17:39
I updated the question with how I start the application, if that helps. — SFBA26, Jul 18 '14 at 18:28
When you're creating this, what is `self`? Panel? Frame? Sizer? — g.d.d.c, Jul 21 '14 at 07:28

score 0 · Answer 1 · answered Jul 18 '14 at 17:40

0

self.SetSizer(gbSizer1)
gbSizer1.Fit(self)
self.Layout()

Try calling layout last.

answered Jul 18 '14 at 17:40

user1636615

102
5

Unfortunately, that did not have any effect. – SFBA26 Jul 18 '14 at 17:42
I used to notice this with the wx.EVT_SIZE event. Calling layout would have no effect but re-sizing would. – user1636615 Jul 18 '14 at 17:49
When I resize the window so that the area with the line is not visible and then back to where it is visible, the line shows up. If I resize without going over that area, it does not change. – SFBA26 Jul 18 '14 at 17:56
You shouldn't have to, but did you try a self.Refresh() ? – Mike Driscoll Jul 18 '14 at 18:21
I updated the question with how I start the application, if that helps. – SFBA26 Jul 18 '14 at 18:34

wx.StaticLine doesn't always display

1 Answers1