Activating wx.LC_NO_HEADER -> lots of empty white space being added to the ListCtrl

[Sommerforsker]

Hi, I want to remove my header from my ListCtrl. This should be a walk in the park, but even though the header disappears, two columns worth of blank space is added to the right of my list.
Why? How can I avoid this?

Best regards, Odin.

With header:

Without header:

import wx

import wx.grid

CCODEs = ['CARC','THER','ZETA','TENS']

class Mat1(wx.Frame):

    def __init__(self, parent):
        wx.Frame.__init__(self, parent)
        self.SetTitle('InputFileGenerator')
        self.Maximize(True)

        #Title
        font = self.GetFont()
        font.SetPointSize(20)
        title = wx.StaticText(self,-1,'  Material')
        title.SetFont(font)

        # Conf button
        confButton = wx.Button(self, -1, "Confirm")
        confButton.Bind(wx.EVT_BUTTON, self.OnConf)

        # KeyDown
        self.Bind(wx.EVT_KEY_DOWN, self.OnKeyDown)

        #DragSource
        self.source = wx.ListCtrl(self, style=wx.LC_LIST | wx.LC_SORT_ASCENDING | wx.LC_SINGLE_SEL)
        self.source.SetColumnWidth(0,60)
        for code in CCODEs:
            self.source.InsertItem(0,code)

        self.Bind(wx.EVT_LIST_BEGIN_DRAG, self.OnDragInit, id=self.source.GetId())
        self.source.Bind(wx.EVT_KEY_DOWN, self.OnKeyDown)

        #DropTarget
        self.target = wx.ListCtrl(self, style=wx.LC_REPORT
                                              #| wx.LC_NO_HEADER #<--------------------------------------------------------------------------------------------------
                                              | wx.LC_VRULES
                                              | wx.LC_HRULES
                                  )
        self.target.InsertColumn(1, 'No.')
        self.target.InsertColumn(2, 'Type')
        self.target.SetColumnWidth(0, 40)
        self.target.SetColumnWidth(1, 60)
        self.target.SetColumnWidth(2, 0)
        self.target.InsertItem(0, 'No.')
        self.target.SetItem(0, 1, 'Type')
        f = self.target.GetItemFont(0)
        f.SetWeight(wx.FONTWEIGHT_BOLD)
        self.target.SetItemFont(0,f)


        self.target.Bind(wx.EVT_KEY_DOWN, self.OnKeyDown)
        dt = MyTextDropTarget(self.target)
        self.target.SetDropTarget(dt)


        vbox = wx.BoxSizer(wx.VERTICAL)
        vbox2 = wx.BoxSizer(wx.VERTICAL)
        hbox = wx.BoxSizer(wx.HORIZONTAL)
        vbox2.AddStretchSpacer(12)
        vbox2.Add(self.source, 10, 0, 0)
        vbox2.AddStretchSpacer(12)
        hbox.AddStretchSpacer(10)
        hbox.Add(vbox2, 1, wx.EXPAND, 0)
        hbox.AddStretchSpacer(5)
        hbox.Add(self.target, 1, wx.EXPAND | wx.LEFT | wx.RIGHT, 0)
        hbox.AddStretchSpacer(10)
        vbox.AddStretchSpacer(1)
        vbox.Add(title, 0, 0, 20)
        vbox.AddStretchSpacer(5)
        vbox.Add(hbox, 10, wx.ALIGN_CENTER,0)
        vbox.AddStretchSpacer(10)
        vbox.Add(confButton, 0, wx.ALIGN_RIGHT, 0)
        vbox.SetSizeHints(self)
        self.SetSizer(vbox)

    def OnDragInit(self, event):

        text = self.source.GetItemText(event.GetIndex())
        tdo = wx.TextDataObject(text)
        tds = wx.DropSource(self.source)

        tds.SetData(tdo)
        tds.DoDragDrop(True)

    def OnKeyDown(self, e):
        keycode = e.GetKeyCode()
        if keycode == wx.WXK_DELETE or keycode == wx.WXK_BACK:
            self.target.DeleteItem(self.target.GetItemCount()-1)
        elif keycode == wx.WXK_RETURN:
            self.OnConf()
        else:
            e.Skip()

    def OnConf(self,e):
        self.Destroy()


class MyTextDropTarget(wx.TextDropTarget):

    def __init__(self, object):
        wx.TextDropTarget.__init__(self)
        self.object = object

    def OnDropText(self, x, y, data):
        index = self.object.GetItemCount()
        self.object.InsertItem(index,str(index))
        self.object.SetItem(index, 1, data)
        return True


def main():
    app = wx.App()
    frame = Mat1(None)
    frame.Show()
    app.MainLoop()

if __name__ == '__main__':
    app = wx.App()
    main()

[Robin Dunn]

It looks like the listctrl calculates its best size using the column widths only if there are column headers (and columns):

https://github.com/wxWidgets/wxWidgets/blob/master/src/common/listctrlcmn.cpp#L183

You can override the self-calculated best size by setting the min size. The sizers will use that over the best size if it's set.

--

Robin

Discuss wxPython

[Sommerforsker]

That solved it!

Thanks a lot.

Best regards, Odin.