wxpython frame clear/refresh

[LarZ]

Hey guys,

here's a simple one:

I'm developing a load test suite (for GSM networks) at the moment and i have scripts that create traffic patterns and all that.

I am developing a GUI for the test suite that dynamically adjusts the layout and controls which are displayed on a wxframe. The GUI manipulates the test configuration settings, parameters and traffic patterns. The only problem is that i can't remove the old controls. When i select a different test the new desired layout does appear, but the old one still exists.

I have tried:

self.ClearBackground()
self.Refresh()

but i can understand why these would not be working, as clearBackground applies to the bg, and refresh simply refreshes existing controls.

How do i delete all the controls on a given wxframe? (yes, the controls are all directly on the frame)

I basically want to just clear the frame, but Clear() doesn't exist. I don't really care if the controls are destroyed or not, just as long as they're not visible anymore.

Cheers,

LarZ

[woooee]

Try self.Destroy() The wiki has examples
http://wiki.wxpython.org/Getting_Started

[LarZ]

Try self.Destroy() The wiki has examples
http://wiki.wxpython.org/Getting_Started

Afraid not my friend. This simply destroys the frame, i don't want to have to recreate it i just want to remove any controls that are on it as if i just instantiated the frame.

[LarZ]

I have also tried

for control in self.allControls:
			control.Destroy()

but this causes a segmentation error which is forcing the app to crash out.

[vegaseat]

What happens if you put all your controls on a Panel and then destroy the Panel?

[LarZ]

This may work but i'm having trouble with the panel. with the normal method where i place a control directly on a frame i pass in self as the 1st argument. Then when i try to place it on a panel (declared: self.panel = wxPanel ( self, -1 )) and i pass in self.panel instead of self (which is my frame) all of a sudden it looks for pointers... YUCK... pointers...

I want to stay away from panels i think, although your suggestion could work, i still don't see why i can't just remove one control. When i tried destroy on one single control my application hanged too, so i don't see how it would be different for a wxPanel, other than the fact that it derives from wxwindow and not wxcontrol. But wxcontrol derives from wxwindow so i'm skeptical to say the least.

There will be a lot of UI changing going on as all controls are dynamically created. I don't really want to have to recreate everything ALL the time...

I'm not familiar with python's way of deleting objects. can i say del(myCbx) to remove the object from memory? Would this method have knock on effects? I know it's not great programming but i'm not left a lot of choice. I've never heard of an object belonging to another object without the ability to be removed :s

even if i could hide them and move them around it would help...

LarZ

[vegaseat]

Generally in Python you can use del myobject , but remember wxPython is a wrapper for wxWindows which is written in C++. Let me play with it! Also, could you give us a short sample code of what you do to hang it up?

Well, I played with it ...

import wx

class Panel1(wx.Panel):
    """create a panel with a label and button on it"""
    def __init__(self, parent, id):
        wx.Panel.__init__(self, parent, id)
        str1 = "War is Hell!"

        self.label1 = wx.StaticText(self, -1, str1 , pos=(20, 30))
        self.button1 = wx.Button(self, id=-1, label='Destroy',
            pos=(20, 60), size=(175, 28))
        self.button1.Bind(wx.EVT_BUTTON, self.button1Click)

    def button1Click(self, event):
        # this will just destroy the label
        #self.label1.Destroy()
        # this will destroy the whole panel and the components on it
        self.Destroy()

    
app = wx.PySimpleApp()
# create a window/frame, no parent, -1 is default ID
frame1 = wx.Frame(None, -1, "A label on a panel", size=(300, 150))
# call the derived class, parent is frame and id is -1
Panel1(frame1,-1)
frame1.Show(1)
app.MainLoop()

Works as predicted.

[LarZ]

yeah i'll keep tryin at this...

Appreciate your help :)

[LarZ]

I seem to have gotten it working... I don't know what the problem was though :D

Thanks a lot for your help!

[LarZ]

Please explain why the following is not working for me... it's really frustrating :@
I'm getting a segmentation fault when i change the combobox selection, which forces the panel to be destroyed...

from wxPython.wx import *

currentPoint = wxPoint(10,10)
currentTest = None

def adjustPointForNewLabel(oldPoint):
	return wxPoint(oldPoint.x+155, oldPoint.y+7)
	
def adjustPointForNewComboBox(oldPoint):
	return wxPoint(oldPoint.x+45, oldPoint.y-7)

class MainPanel(wxPanel):
	def __init__(self, parent):
		wxPanel.__init__(self,parent,-1)
		
class MainFrame(wxFrame):
	def __init__(self, parent, ID, title):
		wxFrame.__init__(self, parent, ID, title,wxDefaultPosition, wxSize(1000, 500))
		self.createMainPanel(self)
		
	def createMainPanel(self,frame):
		self.mainPanel = MainPanel(frame)
		self.setTestSelectionControls(self.mainPanel)
		
	def setTestSelectionControls(self,panel):
		global currentPoint
		self.lblTest = wxStaticText(panel, -1, "Test: ",currentPoint)
		available = ["1","2","3","4","5"]
		currentPoint = adjustPointForNewComboBox(currentPoint)
		self.cbxTests = wxComboBox(panel, 106, "select test", currentPoint, wxSize(140, -1),available, wxCB_DROPDOWN)
		EVT_COMBOBOX(self, 106, self.EvtCbx)
		
	def EvtCbx(self,selection):
		print "This is where the app breaks"
		self.mainPanel.Destroy()

class MyApp(wxApp):
	def OnInit(self):
		frame = MainFrame(NULL, -1, "blah")
		frame.Show(1)
		return true

app = MyApp(0)
app.MainLoop()

Note: Looks like really old code and tabs on top of all that. Can't play with it, my programing editor hates tabs for indents.

[LarZ]

can anybody help me with the above problem please? It might be something stupid, or it might be the wx framework that's causing the segmentation fault...

[Dixtosa]

parent.layout()