I would like to know if it is possible to change the formatting of a grid object in wxPython.
Specifically I would like to know how to change the background color, font type, font color, and border color of the header labels and the row labels.
Here is a simple grid that I would like to change the formatting of:
import wx
import wx.grid as gridlib
class MyForm(wx.Frame):
def __init__(self):
"""Constructor"""
wx.Frame.__init__(self, parent=None, title="A Simple Grid")
panel = wx.Panel(self)
myGrid = gridlib.Grid(panel)
myGrid.CreateGrid(12, 8)
sizer = wx.BoxSizer(wx.VERTICAL)
sizer.Add(myGrid, 1, wx.EXPAND)
panel.SetSizer(sizer)
if __name__ == "__main__":
app = wx.PySimpleApp()
frame = MyForm().Show()
app.MainLoop()
Thanks in advance!
First off, wx.PySimpleApp has been deprecated for a very long time and you really shouldn't use it any more. Use wx.App instead.
As for your question you would need to use wx.lib.mixins.gridlabelrenderer. The demo has an example in it called GridLabelRenderer that you can use. Basically you subclass GridLabelRenderer and modify its Draw method. Then you call each column's SetColLabelRenderer method and set it to use your custom renderer.
Related
I'm taking the first steps to move from .NET to Python but I'm already having a few headaches regarding the GUI design.
For some reason, passing the size attribute to a wx.Button seems to be kind of ignored. And I say "kind of" because the actual space seems to change but the actual button keeps occupying the same space:
import wx
class Example(wx.Frame):
def __init__(self, *args, **kwargs):
super(Example, self).__init__(*args, **kwargs)
self.InitUI()
def InitUI(self):
self.SetSize((800, 600))
self.SetTitle('Main Menu')
self.Centre()
self.Show(True)
''' Fill the form '''
self.lblUsername = wx.StaticText(self, size=(80, -1), pos=(20,20), label="Username:" )
self.txtUsername = wx.TextCtrl(self, size=(140, -1), pos=(100,20), style=wx.TE_PROCESS_ENTER)
self.lblPassword = wx.StaticText(self, size=(80, -1), pos=(20,50), label="Password:" )
self.txtPassword = wx.TextCtrl(self, size=(140, -1), pos=(100,50), style=wx.TE_PROCESS_ENTER)
self.btnOK = wx.Button( self, label="OK", pos=(260, 16), size=(50,50))
self.btnOK.Bind(wx.EVT_BUTTON, self.onClickOK)
self.statusbar = self.CreateStatusBar()
self.statusbar.SetStatusText('Ready')
def onClickOK(self, e):
print "Button triggered"
def main():
ex = wx.App()
Example(None)
ex.MainLoop()
if __name__ == '__main__':
main()
No matter what size I set, the Button won't stretch (it will be centered as if all the space was actually being used, but will still be small).
Can anyone spot what am I doing wrong?
This is a limit imposed by OSX. The way the native button widget is drawn only allows it to be stretched horizontally, and the vertical size is fixed. Or rather, as you've discovered, the widget itself can be larger than normal vertically, but it will only draw itself at a fixed height within that space. It seems less neccessary with modern versions of OSX, but if you look at buttons in OSX from a few years ago you can probably see why this is so. The esthetic graphical effect of the "tic-tack" or "capsule" buttons would be totally ruined if they were a non-standard vertical size, causing the images used to draw the buttons to be stretched. wxWidgets follows the native plaform look and feel standards where possible, in this case it happens that Apple's standard is imposed upon us and wx can't offer the same level of flexibility that it usually does.
You do have some options however if you really want taller than normal buttons. The native widgets have a few different standard sizes, which you can select using the SetWindowVariant method, although I don't think the variants would get as tall as you want. Or you could use a generic button widget instead of a native one, such as wx.lib.buttons.ThemedGenButton.
Same problem in my little Software EventSoundControl.
Just a workaround: Use a multiline label and sizes of wxButton will work as desired!
If you want the button to stretch when you resize the frame, then you cannot use static sizes and positioning. You will need to put your widgets in a sizer. Then the sizer will manage the position / size of the widget(s) as you change the size of the frame. There are many examples on the wxPython wiki that demonstrate how to use sizers. You might also find the following tutorial helpful:
http://zetcode.com/wxpython/layout/
I have a simple wxPython application. It basically has a image and a text-entry field (a wx.TextCtrl).
I want to be able to immediately be able to start entering text as soon as the window opens. Right now, I have to first click in the text control, and then I can start entering text.
Here is a minimal app that demonstrates the issue:
import wx
class MyFrame(wx.Frame):
""" We simply derive a new class of Frame. """
def __init__(self, parent, title):
wx.Frame.__init__(self, parent, title=title, size=(200, 100))
mainSizer = wx.BoxSizer(wx.VERTICAL)
self.control = wx.TextCtrl(self, style=wx.TE_MULTILINE)
mainSizer.Add(self.control, 1, wx.EXPAND)
self.SetSizer(mainSizer)
self.Show(True)
app = wx.App(False)
frame = MyFrame(None, 'Small editor')
app.MainLoop()
I've poked around with wx.SetInsertionPoint, but that does not seem to have any effect.
Ah, derp. I had to look further up the inheritance chain.
You can simply call SetFocus() on the control (in this case, self.control.SetFocus()).
SetFocus() is a member function of wxWindow. I was only looking at the docs for wxTextCtrl.
Of course, I didn't think to look up the inheritance chain until I had already asked the question.
I'm leaving this here, as this is a pretty hard to google issue. Hopefully this will help someone else.
wxpython 2.8.11.0, python 2.7
If i put some Sizer with some controls directly into a Frame like
import wx
app=wx.App()
frm = wx.Frame(None, title='title')
sizer = wx.BoxSizer(wx.HORIZONTAL)
sizer.Add(wx.SpinCtrl(frm))
sizer.Add(wx.SpinCtrl(frm))
frm.SetSizerAndFit(sizer)
frm.Show()
app.MainLoop()
the Frame will automagically have a correct minimum size to contain the Sizer and it is not possible to make it smaller.
If there is a Panel in between (as needed for tabbing between controls) this does not work, the window can be made too small.
import wx
app=wx.App()
frm = wx.Frame(None, title='title')
pan = wx.Panel(frm)
sizer = wx.BoxSizer(wx.HORIZONTAL)
sizer.Add(wx.SpinCtrl(pan))
sizer.Add(wx.SpinCtrl(pan))
pan.SetSizerAndFit(sizer)
frm.Show()
app.MainLoop()
Additionally frm.Fit() and frm.SetMinSize(frm.GetEffectiveMinSize()) are required to get the same behavior. Full Code:
import wx
app=wx.App()
frm = wx.Frame(None, title='title')
pan = wx.Panel(frm)
sizer = wx.BoxSizer(wx.HORIZONTAL)
sizer.Add(wx.SpinCtrl(pan))
sizer.Add(wx.SpinCtrl(pan))
pan.SetSizerAndFit(sizer)
frm.Fit()
frm.SetMinSize(frm.GetEffectiveMinSize())
frm.Show()
app.MainLoop()
I am okay with frm.Fit(), but i dislike frm.SetMinSize(frm.GetEffectiveMinSize()). Isn't there a better solution so that the Frame automatically considers the minimum size of the Panel just like with the Sizer before? I'm considered with what happens if the EffectiveMinSize changes after another control is added to the sizer.
Edit:
Apparently
panel.SetSizerAndFit(sizer)
frm.Fit()
frm.SetMinSize(frm.GetEffectiveMinSize())
should be replaced by
panel.SetSizer(sizer)
sizer.SetSizeHints(frm)
which looks somewhat cleaner. So in total this looks like
import wx
app=wx.App()
frm = wx.Frame(None, title='title')
pan = wx.Panel(frm)
sizer = wx.BoxSizer(wx.HORIZONTAL)
sizer.Add(wx.SpinCtrl(pan))
sizer.Add(wx.SpinCtrl(pan))
pan.SetSizer(sizer)
sizer.SetSizeHints(frm)
frm.Show()
app.MainLoop()
Is this the preferred way to do this?
If widgets are added later on even the first approach with the Sizer directly on the Frame doesn't get it right without intervention, so i think that is a totally different question.
The most elegant way (IMHO) is given in phineas' answer. It is slightly inefficient to have an extra otherwise unneeded sizer but I don't think it can really be noticeable.
Some people do call SetSizeHints() manually, as in your last example, and this works as well and might be more clear (whenever I use an extra sizer I feel the need to leave a comment explaining why it shouldn't be removed).
Unfortunately there is no better way and I am not sure if we can even add one because you need to do something with all of the panel, the sizer and the frame and this means that you can't do it with a single method call without passing unrelated parameters to it. I.e. we could have something like
panel.SetSizerAndFitParent(sizer, frame);
but it's not really clear whether this would be better.
What about introducing a sizer that manages the frame content (e.g. the panel)? Since you didn't include a minimal example, I haven't tested it yet.
frameSizer = wx.BoxSizer(wx.VERTICAL)
frameSizer.Add(panel)
frm.SetSizerAndFit(frameSizer)
Is it possible to make a wxPython window only re-sizable to a certain ratio? I know you can disable resizing; however, I'd like it so when the window was resized it stuck to a certain width to height ratio.
One obvious way to do this would be to bind wx.EVT_SIZE to a function that constrains the aspect ratio. I'm not certain this is The Right Way to do this, but it works:
import wx
class SizeEvent(wx.Frame):
def __init__(self, parent, id, title):
wx.Frame.__init__(self, parent, id, title)
self.Bind(wx.EVT_SIZE, self.OnSize)
self.Centre()
self.SetSizeWH(400, 300)
self.Show(True)
def OnSize(self, event):
hsize = event.GetSize()[0] * 0.75
self.SetSizeHints(minW=-1, minH=hsize, maxH=hsize)
self.SetTitle(str(event.GetSize()))
app = wx.App()
SizeEvent(None, 1, 'sizeevent.py')
app.MainLoop()
(The boilerplate is borrowed from here.)
I'm not too familiar with wxPython, but can't you just reset the window size to your max/min size that you want once the user pass that? Preferably in the event that detects resizing?
import wx
class TestDraw(wx.Panel):
def __init__(self,parent=None,id=-1):
wx.Panel.__init__(self,parent,id)
self.SetBackgroundColour("#FFFFFF")
self.Bind(wx.EVT_PAINT,self.onPaint)
def onPaint(self, event):
event.Skip()
dc=wx.PaintDC(self)
dc.BeginDrawing()
width=dc.GetSize()[0]
height=dc.GetSize()[1]
if height<width:
self.drawTestRects(dc)
else:
dc.Clear()
dc.EndDrawing()
def drawTestRects(self,dc):
dc.SetBrush(wx.Brush("#000000",style=wx.SOLID))
dc.DrawRectangle(50,50,50,50)
dc.DrawRectangle(100,100,100,100)
class TestFrame(wx.Frame):
def __init__(self, parent, title):
wx.Frame.__init__(self, parent, title=title, size=(640,480))
self.mainPanel=TestDraw(self,-1)
self.Show(True)
app = wx.App(False)
frame = TestFrame(None,"Test App")
app.MainLoop()
This code should draw the test rectangles only when the height is less than the width, and otherwise the window should remain clear. However, if you mess with resizing the window, the panel isn't actually redrawn unless it is moved off the window. What am I doing wrong?
You can bind a method to handle wx.EVT_SIZE or the panel and invalidate it there. Alternatively simply use the wx.FULL_REPAINT_ON_RESIZE for the panel.
The documentation for a SizeEvent claims that there may be some complications when drawing depends on the dimensions of the window. I do not know exactly what is going on behind the scenes. I followed the suggestion on the link and added the call self.Refresh() to the top of onPaint() and this seems to give the desired behavior. See mghie's answer for a more efficient example of working code.