New panel activating only when window resized: WxPython

2022-01-19 16:33 TLS_R imported from Stackoverflow

I want to delete a panel ( mainPanel )and replace a panel ( secPanel )in its place. The code I have tried:

import wx

class secPanel ( wx.Panel ):
    def __init__ ( self, parent ):
        wx.Panel.__init__ ( self, parent = parent )
        wx.TextCtrl ( self, pos = ( 100, 100 ) )

class mainPanel ( wx.Panel ):
    def __init__ ( self, parent ):
        wx.Panel.__init__ ( self, parent = parent )
        self.parent = parent
        b = wx.Button ( self, label = "Test", pos = ( 100, 100 ) )
        self.Bind ( wx.EVT_BUTTON, self.onPress, b )

    def onPress ( self, event ):
        parent = self.parent
        self.Destroy()
        secPanel ( parent )
        
class Window ( wx.Frame ):
    def __init__ ( self ):
        wx.Frame.__init__ ( self, parent = None, title = "" )

        mainPanel ( self )
        self.Show()

if __name__ == "__main__":
    app = wx.App()
    window = Window()
    app.MainLoop()

The mainPanel gets deleted but the secPanel only shows when the window is resized ( even just a pixel works ). Until I resize it shows a grey screen ( the one which would show without any panel ). This is quite annoying.

1 answer

answered 2022-01-19 19:26 Rolf of Saxony

In this case Layout() is your friend.
Normally Layout() is used when sizers are involved but in this case, there are no sizers but the parent is a wx.TopLevelWindow.

Layout lays out the children using the window sizer or resizes the only child of the window to cover its entire area.

wx.TopLevelWindow.Layout overrides the base class Layout method to check if this window contains exactly one child – which is commonly the case, with wx.Panel being often created as the only child of wx.TopLevelWindow – and, if this is the case, resizes this child window to cover the entire client area.

See parent.Layout() below:

import wx

class secPanel ( wx.Panel ):
    def __init__ ( self, parent ):
        wx.Panel.__init__ ( self, parent = parent )
        wx.TextCtrl ( self, pos = ( 100, 100 ) )

class mainPanel ( wx.Panel ):
    def __init__ ( self, parent ):
        wx.Panel.__init__ ( self, parent = parent )
        self.parent = parent
        b = wx.Button ( self, label = "Test", pos = ( 100, 100 ) )
        self.Bind ( wx.EVT_BUTTON, self.onPress, b )

    def onPress ( self, event ):
        parent = self.parent
        self.Destroy()
        secPanel ( parent )
        parent.Layout()

class Window ( wx.Frame ):
    def __init__ ( self ):
        wx.Frame.__init__ ( self, parent = None, title = "" )

        mainPanel ( self )
        self.Show()

if __name__ == "__main__":
    app = wx.App()
    window = Window()
    app.MainLoop()

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Python File Tagging System does not retrieve nested dictionaries in dictionary

I am building a file tagging system using Python. The idea is simple. Given a directory of files (and files within subdirectories), I want to filter them out using a filter input and tag those files with a word or a phrase.

If I got the following contents in my current directory:

data/
   budget.xls
   world_building_budget.txt
a.txt
b.exe
hello_world.dat
world_builder.spec

and I execute the following command in the shell:

py -3 tag_tool.py -filter=world -tag="World-Building Tool"

My output will be:

These files were tagged with "World-Building Tool":
data/ world_building_budget.txt
hello_world.dat
world_builder.spec

My current output isn't exactly like this but basically, I am converting all files and files within subdirectories into a single dictionary like this:

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Right now, my dictionary looks like this: key:''.

In the following function, I am turning the empty values '' into empty lists (to hold my tags):

def empty_str_to_list(d):
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        if v == '':
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When I run my entire code, this is my output:

hello_world.dat ['World-Building Tool']
world_builder.spec ['World-Building Tool']

But it does not see data/world_building_budget.txt. This is the full dictionary:

{'data': {'world_building_budget.txt': []},  
'a.txt': [],
'hello_world.dat': [], 
'b.exe': [], 
'world_builder.spec': []}

This is my full code:

import os, argparse


def fs_tree_to_dict(path_):
    file_token = ''
    for root, dirs, files in os.walk(path_):
        tree = {d: fs_tree_to_dict(os.path.join(root, d)) for d in dirs}
        tree.update({f: file_token for f in files})
        return tree


def empty_str_to_list(d):
    for k, v in d.items():
        if v == '':
            d[k] = []
        elif isinstance(v, dict):
            empty_str_to_list(v)


parser = argparse.ArgumentParser(description="Just an example", formatter_class=argparse.ArgumentDefaultsHelpFormatter)

parser.add_argument("--filter", action="store", help="keyword to filter files")
parser.add_argument("--tag", action="store", help="a tag phrase to attach to a file")
parser.add_argument("--get_tagged", action="store", help="retrieve files matching an existing tag")

args = parser.parse_args()

filter = args.filter
tag = args.tag
get_tagged = args.get_tagged
current_dir = os.getcwd()

files_dict = fs_tree_to_dict(current_dir)
empty_str_to_list(files_dict)

for k, v in files_dict.items():
    if filter in k:
        if v == []:
            v.append(tag)
            print(k, v)

        elif isinstance(v, dict):
            empty_str_to_list(v)

    if get_tagged in v:
        print(k, v)

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 File "C:\Users\pjain\AppData\Local\Programs\Python\Python310\lib\runpy.py", line 196, in _run_module_as_main
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Find all nested SizerItems within a Frame in wxPython

In wxPython, I am trying to adjust the border of items within a form on startup programatically in order to support higher DPI displays a bit better. I want to do is loop through each item in the frame (i.e. each row as shown in the editor) and double the "border" attribute if it has one. This mostly works great. However, some sizers I'm unable to find programmatically, specifically those which are nested inside other sizers.

I've recreated this on a simplified form:

I have set the border of each item to unique values so that I know which ones have been hit.

panel1: border of 1
hiddenSizer: border of 2
bSizer261: border of 3
bSizer27: border of 4
bSizer28: border of 5
bSizer29: border of 6
m_staticText29: border of 7

My code to (attempt to) find all SizerItems is the following:

import wx

def walk_children(item):
    for value in item.GetChildren():
        yield value
        for subvalue in walk_children(value):
            yield subvalue

def adjust_border(frame : wx.Window):
    for x in walk_children(frame):
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        self.SetSizeHints( wx.DefaultSize, wx.DefaultSize )
        self.SetBackgroundColour( wx.SystemSettings.GetColour( wx.SYS_COLOUR_WINDOW ) )
        bSizer1 = wx.BoxSizer( wx.HORIZONTAL )
        self.panel1 = wx.Panel( self, wx.ID_ANY, wx.DefaultPosition, wx.DefaultSize, wx.TAB_TRAVERSAL )
        bSizer23 = wx.BoxSizer( wx.VERTICAL )
        hiddenSizer = wx.StaticBoxSizer( wx.StaticBox( self.panel1, wx.ID_ANY, u"Top Panel" ), wx.VERTICAL )
        bSizer261 = wx.BoxSizer( wx.VERTICAL )
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        pass


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    def __init__(self, parent):
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if __name__ == "__main__":
    run_gui()

The output is this which indicates only 3/7 of them haved been found (those with borders of 1, 3, and 7:

<wx._core.Panel object at 0x00000133C3DD91F8> <wx._core.BoxSizer object at 0x00000133C3DD0DC8>
parents: [<wx._core.Panel object at 0x00000133C3DD91F8>, <__main__.MainFrame object at 0x00000133C3DD0D38>]
<wx._core.SizerItem object at 0x00000133C3FA2708> 1

<wx._core.StaticBox object at 0x00000133C3DD5E58> <wx._core.StaticBoxSizer object at 0x00000133C3DD5EE8>
parents: [<wx._core.StaticBox object at 0x00000133C3DD5E58>, <wx._core.Panel object at 0x00000133C3DD91F8>, <__main__.MainFrame object at 0x00000133C3DD0D38>]
<wx._core.SizerItem object at 0x00000133C3FA2708> 3

<wx._core.StaticText object at 0x00000133C3FA24C8> <wx._core.BoxSizer object at 0x00000133C3FA2438>
parents: [<wx._core.StaticText object at 0x00000133C3FA24C8>, <wx._core.StaticBox object at 0x00000133C3DD5E58>, <wx._core.Panel object at 0x00000133C3DD91F8>, <__main__.MainFrame object at 0x00000133C3DD0D38>]
<wx._core.SizerItem object at 0x00000133C3FA2708> 7

How do I loop through each SizerItem in a frame programmatically without skipping entries?

There are similar questions like this, but the answers do not provide nested SizerItems. Generate List of All sizerItems Nested in wxPython Sizers

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I cannot set up wxpython with pydev. In a python2 project I have had an external library /usr/lib/python2.7/dist-packages/wxPython-4.0.1-py2.7-linux-amd64.egg and it works fine. However, using the 'add zip/jar/egg/' option in my current version of pydev gives me no option to stop at the egg, but continues down to a file, eg.../PKG-INFO As a result I get 'no module named wx' error on compile. Copied egg to python3/dist-packages of course, but this doesn't work even if I add '/usr/lib/python3/dist-packages' explicitly. Can anyone explain ?

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My code where I kept same y-coordinate to draw horizontal line is below. In this case, line is not visible.

import wx;
import time;

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frame=wx.Frame(None,-1,'Line');
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import wx;
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New panel activating only when window resized: WxPython

1 answer

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