wxPython I have the Frame with three Panels. Each Panel has wx.ComboBox There is no possibility to make one wx.ComboBox for several parents so I have three different combo-boxes on three panels with the same list for selection.
Is there a simple way to sync selection for these combo-boxes? E.g. if choose something in the first combo-box on the first panel it should be chosen in the second and third combo-boxes on the other hidden panels.
I think the easiest method would be to use pubsub. You can have each panel instance subscribed to a listener and then when you change the combobox, it can send a message out to the listeners telling them to update.
I created a simple Notebook with three panels that demonstrates the concept:
import wx
from wx.lib.pubsub import pub
class TabPanel(wx.Panel):
def __init__(self, parent):
wx.Panel.__init__(self, parent)
languages = ['Python', 'C++', 'PHP', 'Go']
self.combo = wx.ComboBox(self, value='Python', choices=languages,
size=(80, -1))
self.combo.Bind(wx.EVT_COMBOBOX, self.on_selection)
pub.subscribe(self.update_selection, 'combo_update')
def update_selection(self, selection):
"""
pubsub listener
"""
self.combo.SetSelection(selection)
def on_selection(self, event):
"""
combobox event handler
"""
selection = self.combo.GetSelection()
pub.sendMessage('combo_update', selection=selection)
class MyFrame(wx.Frame):
def __init__(self):
wx.Frame.__init__(self, None, title='Comboboxes!')
panel = wx.Panel(self)
notebook = wx.Notebook(panel)
for page in range(1, 4):
tab = TabPanel(notebook)
notebook.AddPage(tab, 'Tab {}'.format(page))
sizer = wx.BoxSizer(wx.VERTICAL)
sizer.Add(notebook, 1, wx.ALL|wx.EXPAND, 5)
panel.SetSizer(sizer)
self.Show()
if __name__ == '__main__':
app = wx.App(False)
frame = MyFrame()
app.MainLoop()
You can simply use GetSelection() in the event callback and set all of the comboboxes to the result obtained.
i.e.
import wx
class MyFrame(wx.Frame):
def __init__(self):
wx.Frame.__init__(self, None, title="Test")
self.MyList = ["Abc","Def","Ghi"]
self.panel1 = wx.Panel(self,-1)
self.panel2 = wx.Panel(self,-1)
self.panel3 = wx.Panel(self,-1)
self.Picker1 = wx.ComboBox(self.panel1, pos=(10,10), value="1", size=(100, -1), choices=self.MyList)
self.text1 = wx.StaticText(self.panel1, -1, "1", pos=(120,10))
self.Picker2 = wx.ComboBox(self.panel2, pos=(10,10), value="2", size=(100, -1), choices=self.MyList)
self.text2 = wx.StaticText(self.panel2, -1, "2", pos=(120,10))
self.Picker3 = wx.ComboBox(self.panel3, pos=(10,10), value="3", size=(100, -1), choices=self.MyList)
self.text3 = wx.StaticText(self.panel3, -1, "3", pos=(120,10))
self.Bind(wx.EVT_COMBOBOX, self.EvtComboBox)
vbox = wx.BoxSizer(wx.VERTICAL)
vbox.Add(self.panel1)
vbox.Add(self.panel2)
vbox.Add(self.panel3)
self.SetSizer(vbox)
self.Show()
self.panel1.SetFocus()
self.panel2.Hide()
self.panel3.Hide()
def EvtComboBox(self,event):
ev = event.GetSelection()
self.Picker1.SetSelection(ev)
self.Picker2.SetSelection(ev)
self.Picker3.SetSelection(ev)
self.panel2.Show()
self.panel3.Show()
self.Layout()
if __name__ == "__main__":
app = wx.App()
frame = MyFrame()
app.MainLoop()
I have added a simple piece of text beside each combobox for clarity and initially hidden panels 2 & 3 as you intimate that they are hidden, in your question. Note self.Layout() is required to display the unhidden panels.
I found the decision for me. It is possible to create the combo-box for the Frame and use it in each panel. I put an example here. Maybe it would be helpful for somebody.
import wx
########################################################################
class PanelOne(wx.Panel):
def __init__(self, parent, selection):
"""Constructor"""
wx.Panel.__init__(self, parent=parent)
self.sizer1 = wx.BoxSizer(wx.VERTICAL)
self.label = wx.StaticText(self, label='Firs panel')
self.sizer1.Add(selection, 1, wx.EXPAND)
self.sizer1.Add(self.label, 1, wx.EXPAND)
self.SetSizer(self.sizer1)
########################################################################
class PanelTwo(wx.Panel):
def __init__(self, parent, selection):
"""Constructor"""
wx.Panel.__init__(self, parent=parent)
self.sizer2 = wx.BoxSizer(wx.VERTICAL)
self.labe2 = wx.StaticText(self, label='Second panel')
self.sizer2.Add(selection, 1, wx.EXPAND)
self.sizer2.Add(self.labe2, 1, wx.EXPAND)
self.SetSizer(self.sizer2)
########################################################################
class MyForm(wx.Frame):
# ----------------------------------------------------------------------
def __init__(self):
wx.Frame.__init__(self, None, wx.ID_ANY,
"Panel Switcher Tutorial")
self.selection = wx.ComboBox(self, size=(200, -1), choices=['One', 'Two', 'Three'], style=wx.CB_DROPDOWN, value='select')
self.panel_one = PanelOne(self, self.selection)
self.panel_two = PanelTwo(self, self.selection)
self.panel_two.Hide()
self.sizer = wx.BoxSizer(wx.VERTICAL)
self.sizer.Add(self.panel_one, 1, wx.EXPAND)
self.sizer.Add(self.panel_two, 1, wx.EXPAND)
self.SetSizer(self.sizer)
# make menu
menubar = wx.MenuBar()
fileMenu = wx.Menu()
switch_panels_menu_item = fileMenu.Append(wx.ID_ANY,
"Switch Panels",
"Some text")
self.Bind(wx.EVT_MENU, self.onSwitchPanels,
switch_panels_menu_item)
menubar.Append(fileMenu, '&File')
self.SetMenuBar(menubar)
# ----------------------------------------------------------------------
def onSwitchPanels(self, event):
""""""
if self.panel_one.IsShown():
self.SetTitle("Panel Two Showing")
self.panel_one.Hide()
self.panel_two.Show()
else:
self.SetTitle("Panel One Showing")
self.panel_one.Show()
self.panel_two.Hide()
self.Layout()
# Run the program
if __name__ == "__main__":
app = wx.App(False)
frame = MyForm()
frame.Show()
app.MainLoop()