Button event question Topic is solved

[ojibway]

I am making a wxprogram to show the geometry associated to elements on the periodic table. The image of a periodic table is my opening frame page with each rectangular image being a button(112 buttons). What I want to do is have the button click event open another window that will contain a GLcanvas. This would allow the user to have additional windows open so that different elements and thier geometry can be compared. I also want to have the glcanvas frame on a separate file, that can be accessed by the on click event. I have been looking for code for this purpose but cannot find it. Any help would be appreciated, a newbie to wx programming, I am.

[Auria]

Sorry, I'm not sure I understand where the problem is. Start by reading tutorials on how to catch events

[ojibway]

What I want my program to do is leave the mainpage accessible at all times, which is basically a page containing nothing more than buttons. When a button is pressed I do not want to repaint(or what ever call it) the frame, but instead open another frame in its own window. That window will contain the GLcanvas.

[briceandre]

In the event handler of your button, you simply create a new frame. Both frames (the one with your button and the new one) will be displayed and the user will be able to interact with both.

So, you create a new frame (SubFrame, for example), you connect a handler to your button (OnButton) and you simply write this :

Code: Select all

void OnButton(wxCommandEvent& e)
{
   new SubFrame(...);
}

Your program will exit when both frames will be closed.

[ojibway]

Here is my code so far, truncated to only include 4 buttons instead of the 112. Should I be learning a different language before the code you see? I also noticed another problem, with 4 buttons the loading of the program is fast, but with 112 buttons the white space behind the buttons is built before the images are loaded. It loads fine, but I would like to get rid of the visual of that white space. Thanks for the help, by the way.

Edited:Hmmm, this is C++ programming forum, and here I am programming in wxpython. Which one works better as a cross platform across the various OS's?

Code: Select all

#!/usr/bin/python

# statusbar.py

import wx

class Statusbar(wx.Frame):
    def __init__(self, parent, id, title):
        wx.Frame.__init__(self, parent, id, title, size=(800, 640), 
	style=wx.CAPTION | wx.SYSTEM_MENU | wx.CLOSE_BOX)

        panel = wx.Panel(self, 1)
        self.SetBackgroundColour(wx.BLACK)
        self.Centre()
        self.sb = self.CreateStatusBar()
              
        ## set-up for sizers
        vbox = wx.BoxSizer(wx.VERTICAL)
        hbox1 = wx.BoxSizer(wx.HORIZONTAL)
        hbox2 = wx.BoxSizer(wx.HORIZONTAL)
        
        ## adding atom buttons row #1
        h = wx.BitmapButton(panel, 2, wx.Bitmap('images/hydrogen.jpg'))
        he = wx.BitmapButton(panel, 3, wx.Bitmap('images/helium.jpg'))
        # row #2
        li = wx.BitmapButton(panel, 4, wx.Bitmap('images/lithium.jpg'))
        be = wx.BitmapButton(panel, 5, wx.Bitmap('images/beryllium.jpg'))

        ## assigining id's to sizer
        hbox1.Add(h), hbox1.Add((0, -1), 1, flag=wx.EXPAND | wx.ALIGN_RIGHT), hbox1.Add(he)
        hbox2.Add(li), hbox2.Add((0, -1), 1, flag=wx.EXPAND | wx.ALIGN_RIGHT), hbox2.Add(be)

        ## event handler for statusbar input
        panel.Bind(wx.EVT_ENTER_WINDOW, self.EnterPanel, id=1)
        h.Bind(wx.EVT_ENTER_WINDOW, self.EnterH, id=2)
        he.Bind(wx.EVT_ENTER_WINDOW, self.EnterHe, id=3)
        li.Bind(wx.EVT_ENTER_WINDOW, self.EnterLi, id=4)
        be.Bind(wx.EVT_ENTER_WINDOW, self.EnterBe, id=5)

        vbox.Add(hbox1, 1, wx.EXPAND)
        vbox.Add(hbox2, 1, wx.EXPAND)

        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(vbox, flag=wx.EXPAND | wx.RIGHT | wx.LEFT | wx.BOTTOM | wx.TOP, border=10)

        self.SetSizer(sizer)
        self.Show(True)
        
        ## definitions for statusbar input
    def EnterPanel(self, event):
        self.sb.SetStatusText('Click Element to View The Geometry')
        event.Skip()
    def EnterH(self, event):
        self.sb.SetStatusText('Hydrogen Atom, Click to View Geometry')
        event.Skip()
    def EnterHe(self, event):
        self.sb.SetStatusText('Helium Atom, Click to View Geometry')
        event.Skip()
    def EnterLi(self, event):
        self.sb.SetStatusText('Lithium Atom, Click to View Geometry')
        event.Skip()
    def EnterBe(self, event):
        self.sb.SetStatusText('Beryllium Atom, Click to View Geometry')
        event.Skip()
        
class MyApp(wx.App):
    def OnInit(self):
        frame = Statusbar(None, -1, 'Test')
        frame.Show(True)
        self.SetTopWindow(frame)
        return True

app = MyApp(0)
app.MainLoop()

EDIT by Auria: Please use code tags

[Auria]

Regarding the white space, I'm not sure what you mean, sorry

wxPython can be discussed here, though indeed the C++ version of wxWidgets is what is most discussed here; wxPython is most discussed on the mailing list.

Edited:Hmmm, this is C++ programming forum, and here I am programming in wxpython. Which one works better as a cross platform across the various OS's?

Which language? I don't think it makes much difference.
Under OSX and Windows the C++ version is perhaps a little easier to package, but then Python is generally easier to learn.

[ojibway]

Regarding the white space, I'm not sure what you mean, sorry

In wxpython, bitmapbuttons are given a white space around them, but it might be something that comes from photoshop. All I know is if I give the same button a staticBitmap label instead, the white space, or background frame around the button disappears, because now the same image is not a button. But, when the program is loading it writes a white space of the buttons and any static bitmaps first, and then it loads the actual images. And because I have 112 buttons the loading process is quite slow, and the white space annoying. Maybe I can preload the images? I don't mind having the white back frame around the buttons, it looks alright.

[Auria]

Well indeed you can preload the images, just create all the wx.Bitmap object first (before the frame).

Another option is to call Freeze first, THEN when you're done call Thaw)

[ojibway]

After spending the last 12 hours of trying to get a glcanvas to open in a different window, I am not sure of the word "easier" as being an appropiate word for describing learning Python. But I finally got it to work, I am alot more bald though.

[Auria]

Really, the only cause I see that could make it take 12 hours, is if you're trying to do it without having studied the appropriate concepts first

Have you learned about object-oriented programming, etc.? Have you read wxWidgets tutorials?

[ojibway]

I should have a book of some sorts, I know, but I don't, cannot get one until the end of the month. So, all I have to go by is the code within the wxpython demo, which is not forth coming in explaining what the code is doing. Forums are on a short list, so can't get help there either. So, I am learning in a rather unorthodox way, alot of misses with getting the code to run, which means more time, but I will remember and understand how the code is working, the hard way. I had downloaded Avogardo, a molecule builder program, and wondered how it worked, I found a tutorial on showmedo of a guy who was building a similar program and followed along. So, I started playing around with my own code, only been at it for a week. At the moment, I am quite pleased with the results of my first program. It's a rather simply one actually, designed to show the geometry of atoms. My next project will be a molecule builder, that will be a bit more involved. But, I'll have a book for reference by then.