Multiline checkbox in wxpython
I am working with wxpython (2.8) with python 2.5. is it possible to force wx.CheckBox to display its label on multiple lines? I would like to be able to do the same as wx.StaticText.Wrap (width)
See the attached example: wx.CheckBox is 200px wide, but this label does not fit in that space.
Any help is really appreciated! many thanks Mauro
#example starts here
import wx
class MyFrame(wx.Frame):
def __init__(self):
wx.Frame.__init__(self, None, title="Hello World", size=
(300,200))
self.panel = wx.Panel(self, -1)
myVSizer = wx.BoxSizer(wx.VERTICAL)
#instantiating a checkbox 200 px wide. but the label is too
long
cb = wx.CheckBox(self.panel, -1, label="This is a very very
long label for 200 pixel wide cb!", size =wx.Size(200, -1))
myVSizer.Add( cb, 1)
self.panel.SetSizer(myVSizer)
myVSizer.Layout()
app = wx.App(redirect=True)
top = MyFrame()
top.Show()
app.MainLoop()
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3 answers
how about something like this? Flex! (I made it a toggle switch to show that it still behaves like one)
import wx
import textwrap
class MultilineRadioButton(wx.RadioButton):
def __init__(self, parent, id=-1, label=wx.EmptyString, wrap=10, pos=wx.DefaultPosition, size=wx.DefaultSize, style=0, validator=wx.DefaultValidator, name=wx.RadioButtonNameStr):
wx.RadioButton.__init__(self,parent,id,'',pos,size,style,validator,name)
self._label = label
self._wrap = wrap
lines = self._label.split('\n')
self._wrappedLabel = []
for line in lines:
self._wrappedLabel.extend(textwrap.wrap(line,self._wrap))
self._textHOffset = 20
dc = wx.ClientDC(self)
font = wx.SystemSettings.GetFont(wx.SYS_DEFAULT_GUI_FONT)
dc.SetFont(font)
maxWidth = 0
totalHeight = 0
lineHeight = 0
for line in self._wrappedLabel:
width, height = dc.GetTextExtent(line)
maxWidth = max(maxWidth,width)
lineHeight = height
totalHeight += lineHeight
self._textHeight = totalHeight
self.SetInitialSize(wx.Size(self._textHOffset + maxWidth,totalHeight))
self.Bind(wx.EVT_PAINT, self.OnPaint)
def OnPaint(self, event):
dc = wx.PaintDC(self)
self.Draw(dc)
self.RefreshRect(wx.Rect(0,0,self._textHOffset,self.GetSize().height))
event.Skip()
def Draw(self, dc):
dc.Clear()
font = wx.SystemSettings.GetFont(wx.SYS_DEFAULT_GUI_FONT)
dc.SetFont(font)
height = self.GetSize().height
if height > self._textHeight:
offset = height / 2 - self._textHeight / 2
else:
offset = 0
for line in self._wrappedLabel:
width, height = dc.GetTextExtent(line)
dc.DrawText(line,self._textHOffset,offset)
offset += height
class HFrame(wx.Frame):
def __init__(self,pos=wx.DefaultPosition):
wx.Frame.__init__(self,None,title="Hello World",size=wx.Size(600,400),pos=pos)
self.panel = wx.Panel(self,-1)
sizer = wx.BoxSizer(wx.HORIZONTAL)
cb = RadioButton(self.panel,-1,label="This is a very very long label for the control!",wrap=10)
sizer.Add(cb,1)
cb = RadioButton(self.panel,-1,label="This is a very very long label for the control!",wrap=10)
sizer.Add(cb,1)
cb = RadioButton(self.panel,-1,label="This is a very very long label for the control!",wrap=10)
sizer.Add(cb,1)
self.panel.SetSizer(sizer)
sizer.Layout()
class VFrame(wx.Frame):
def __init__(self,pos=wx.DefaultPosition):
wx.Frame.__init__(self,None,title="Hello World",size=wx.Size(600,400),pos=pos)
self.panel = wx.Panel(self,-1)
sizer = wx.BoxSizer(wx.VERTICAL)
cb = RadioButton(self.panel,-1,label="This is a very very long label for the control!",wrap=10)
sizer.Add(cb,1)
cb = RadioButton(self.panel,-1,label="This is a very very long label for the control!",wrap=10)
sizer.Add(cb,1)
cb = RadioButton(self.panel,-1,label="This is a very very long label for the control!",wrap=10)
sizer.Add(cb,1)
self.panel.SetSizer(sizer)
sizer.Layout()
app = wx.App(redirect=False)
htop = HFrame(pos=wx.Point(0,50))
htop.Show()
vtop = VFrame(pos=wx.Point(650,50))
vtop.Show()
app.MainLoop()
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Instead of using a checkbox with text, use an unlabeled checkbox with static text for your desired effect, eg.
import wx
class MyFrame(wx.Frame):
def __init__(self):
wx.Frame.__init__(self, None, title="Hello World", size=(300,200))
self.panel = wx.Panel(self, -1)
myVSizer = wx.BoxSizer(wx.VERTICAL)
# use checkbox + static text to wrap the text
myHSizer = wx.BoxSizer(wx.HORIZONTAL)
cb = wx.CheckBox(self.panel, -1, label="")
label = wx.StaticText(self.panel, label="This is a very very long label for 100 pixel wide cb!", size=(100,-1))
label.Wrap(100)
myHSizer.Add(cb, border=5, flag=wx.ALL)
myHSizer.Add(label, border=5, flag=wx.ALL)
myVSizer.Add(myHSizer)
self.panel.SetSizer(myVSizer)
myVSizer.Layout()
app = wx.App(redirect=True)
top = MyFrame()
top.Show()
app.MainLoop()
this added the benefits that, with different layouts, can be done for the text center, either left, right, or anywhere else.
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