I've been trying to get into GUI programming with Python on Xubuntu 14.04 by following a few guides like this one here. I wanted to have a background image in my GUI with whatever buttons on top of it. I searched on stackoverflow and came across a person having a similar issue. His solution worked, but the grid filled up the entire window and I can no longer see the background image. How do I fix this? Here is my code:
#!/usr/bin/env python
# -*- coding: utf-8 -*-:
from gi.repository import Gtk #Here we are importing the GTK3 library to use in our program
class mywindow(Gtk.Window):
def __init__(self):
#In the class's constructor, we have to call the constructor of the super class. In addition, we tell it to set
#the value of the property title to Media Manager v1.0
Gtk.Window.__init__(self, title="Media Manager v1.0") #Creates an Empty Window
#use an overlay for the background image
self.overlay = Gtk.Overlay()
self.add(self.overlay)
self.background = Gtk.Image.new_from_file('Background.jpg')
self.overlay.add(self.background)
self.grid = Gtk.Grid()
self.button1 = Gtk.Button(label="Hello")
self.button1.connect("clicked", self.on_button1_clicked)
self.grid.add(self.button1)
self.overlay.add_overlay(self.grid)
#Gtk.Window.set_default_size(self, 400,325)
Gtk.Window.set_position(self, Gtk.WindowPosition.CENTER)
def on_button1_clicked(self, button):
print "Hello"
def on_button2_clicked(self, button):
print "Exiting..."
def main():
window = mywindow()
#connect to the window's delete event to ensure that the application is terminated if we click on the x to close the window
window.connect("delete-event", Gtk.main_quit)
#Display the window
window.show_all()
#Finally, start the GTK+ processing loop which we quit when the winndow is closed.
Gtk.main()
return 0
if __name__ == '__main__':
main()
Pass values for the valign and halign properties when creating the grid and/or the button. The default for these properties is Gtk.Align.FILL which causes them to cover all the space given to them. Instead, pick Gtk.Align.START, Gtk.Align.END, or Gtk.Align.CENTER.
Related
I have QSystemTrayIcon with a QMenu. In order to fill the menu, I need to fetch some things from the network, so I want to do that in the background.
So I have a QThread with a slot that is connected to the activated signal of the tray icon. Then the thread fetches the resources and updates the menu using another signal.
However, these updates do not show until I close and reopen the menu.
This seems to be a Mac specific problem. I ran my code on Windows, and there it updated more or less correctly. Is there any workaround?
Below is an extracted version of the problem. When the menu is opened, it will sleep 1 second in a thread and then change the menu. This change is not seen.
import sys
import time
from PySide import QtCore, QtGui
class PeerMenu(QtGui.QMenu):
def __init__(self):
QtGui.QMenu.__init__(self)
self.set_peers("prestine")
#QtCore.Slot(object)
def set_peers(self, label):
self.clear()
self.addAction(QtGui.QAction(label, self))
self.addSeparator()
self.addAction(QtGui.QAction("Hello", self))
class GUIListener(QtCore.QObject):
files = QtCore.Signal(object)
def __init__(self):
QtCore.QObject.__init__(self)
self.counter = 0
#QtCore.Slot()
def check(self):
time.sleep(1)
self.counter += 1
self.files.emit(str(self.counter))
if __name__ == '__main__':
app = QtGui.QApplication(sys.argv)
icon = QtGui.QSystemTrayIcon(QtGui.QIcon('images/glyphicons-206-electricity.png'), app)
listener = GUIListener()
t = QtCore.QThread()
t.start()
listener.moveToThread(t)
menu = PeerMenu()
icon.activated.connect(listener.check)
listener.files.connect(menu.set_peers)
icon.setContextMenu(menu)
icon.show()
app.exec_()
After a few hours of extensive googling I finally figured it out.
You can create a borderless window using QtGui.QMainWindow(parent=None, flags=QtCore.Qt.Popup) and then find the location of the icon with icon.geometry().center() and finally move the window there with window.move(icon_point).
There is some hackery involved in deciding how to place the window relative to the icon. Full code can be found at https://github.com/pepijndevos/gierzwaluw/blob/master/gui.py
I am creating a game to run inside a GUI (text area, button, menu etc) I've created a GUI with wxpython. I create a panel inside the main window, which runs a pygame thread.
Problem:
On Windows, the pygame thread runs perfectly inside the main window. But on Linux, the pygame pop up on a new window. How can I set this such that both windows and Linux run the thread in the main window?
Code:
class SDLPanel(wx.Panel):
def __init__(self,parent,ID,tplSize):
global pygame
global pygame_init_flag
wx.Panel.__init__(self, parent, ID, size=tplSize)
self.Fit()
if (sys.platform == 'win32'):
os.environ['SDL_WINDOWID'] = str(self.GetHandle())
os.environ['SDL_VIDEODRIVER'] = 'windib'
else:
os.environ['SDL_VIDEODRIVER'] = 'x11'
#here is where things change if pygame has already been initialized
#we need to do so again
if pygame_init_flag:
#call pygame.init() on subsaquent windows
pygame.init()
else:
#import if this is the first time
import pygame
pygame_init_flag = True #make sure we know that pygame has been imported
pygame.display.init()
window = pygame.display.set_mode(tplSize)
self.thread = SDLThread(window)
self.thread.Start()
def __del__(self):
self.thread.Stop()
print "thread stoped"
#very important line, this makes sure that pygame exits before we
#reinitialize it other wise we get errors
pygame.quit()
Solved problem.
In main window we must self.Show()
Idk why in linux the main window must be showed . Same code.
Tks all
This is a disclaimer alert, according to https://forums.libsdl.org/viewtopic.php?p=39332, the solution works only with SDL 1.2 and not 2.0.
I am trying to provide a custom button class that needs a hover for it to work properly. I am therefore using StaticBitmap and extending it. But I am finding differences between Windows and Linux using the same exact code between both. The following small simple example doesn't work properly in Linux, but works fine in Windows:
import wx
class MyForm(wx.Frame):
def __init__(self):
wx.Frame.__init__(self, None, wx.ID_ANY, "Test")
panel = wx.Panel(self, wx.ID_ANY, size=(200,100))
panel.SetBackgroundColour("Black")
# create a normal bitmap button
bitmap = wx.Bitmap("images/power.png", wx.BITMAP_TYPE_ANY)
self.image1 = wx.StaticBitmap(panel, bitmap=bitmap, size=bitmap.GetSize())
sizer = wx.BoxSizer(wx.VERTICAL)
sizer.Add(self.image1)
panel.SetSizer(sizer)
# This works on Windows, but not on Linux
#self.image1.Bind(wx.EVT_ENTER_WINDOW, self.OnHover)
#self.image1.Bind(wx.EVT_LEAVE_WINDOW, self.OnLeaveHover)
# This (used by itself) gets events for both Linux/Win, but
# doesn't find e.Entering() or e.Leaving() on Linux!
self.image1.Bind(wx.EVT_MOUSE_EVENTS, self.OnMouseEvents)
def OnHover(self, e):
print "Hover"
def OnLeaveHover(self,e):
print "Leaving Hover"
def OnMouseEvents(self,e):
print "Mouse event"
#print dir(e)
if e.Entering():
print "Hover"
elif e.Leaving():
print "Leaving Hover"
else:
e.Skip()
if __name__ == "__main__":
app = wx.App(False)
frame = MyForm()
frame.Show()
app.MainLoop()
Is this a known issue? Is there some other way to bind the event to get the mouseover/hover operation to work properly in Linux?
Also, no forms of self.Bind() work here on Linux or Windows. Why? i.e.:
self.Bind(wx.EVT_ENTER_WINDOW, self.OnHover, self.image1)
self.Bind(wx.EVT_LEAVE_WINDOW, self.OnLeaveHover, self.image1)
Hmmm..., all I can tell you is what I experienced with your code when using it in Ubuntu 12.04
1) My picture never shows up (i.e. a grey window nothing more)
2) when binding the EVT_ENTER/LEAVE_WINDOW to self and not to image1 (see below), it works
# This now works on Linux
#self.Bind(wx.EVT_ENTER_WINDOW, self.OnHover)
#self.Bind(wx.EVT_LEAVE_WINDOW, self.OnLeaveHover)
I hope this helps you in some form. Also I would like to add that I have made many a bad experience with cross-platform compatibility of wxpython unfortunately. I like the library a lot, but once it delves into more obscure widgets, the behaviour may differ wildly between Windows and Linux.
I remember trying to use the MPlayerCtrl once and for the same method in Windows it would return 0 while in Linux it would return -1 (can't mind exactly which method it was, that project got dumped once I noticed it)
Maybe, this is another one of those strange behaviours...
Having thought about it some more.
instead of binding the event to the picture, you could bind it to the widget it is displayed in, such as your panel.
self.panel = wx.Panel(self, wx.ID_ANY, size=(200,100))
self.panel.SetBackgroundColour("Black")
...
#self.panel.Bind(wx.EVT_ENTER_WINDOW, self.OnHover)
#self.pane.Bind(wx.EVT_LEAVE_WINDOW, self.OnLeaveHover)
you should bind the wx.EVT_ENTER_WINDOW/wx.EVT_LEAVE_WINDOW event to self.panel. that works.
wx.EVT_ENTER_WINDOW/wx.EVT_LEAVE_WINDOW is not the subclass of wx.CommandEvent class. It isn't thrown up to the parent window to process.
I've got a wxPython (via wxGlade) app with a dialog that has wx.MAXIMIZE_BOX set in the style, but the maximize box doesn't appear when I run the app.
Here's a minimal program that exhibits the behavior:
#!/usr/bin/env python
import wx
class MyDialog(wx.Dialog):
def __init__(self, *args, **kwds):
kwds["style"] = wx.DEFAULT_DIALOG_STYLE|wx.MAXIMIZE_BOX
wx.Dialog.__init__(self, *args, **kwds)
self.SetTitle("dialog_1")
self.Layout()
if __name__ == "__main__":
app = wx.PySimpleApp(0)
wx.InitAllImageHandlers()
dialog_1 = MyDialog(None, -1, "")
app.SetTopWindow(dialog_1)
dialog_1.Show()
app.MainLoop()
Note that wx.MAXIMIZE_BOX is set, but when I run this program I don't get a maximize box on the dialog:
Is this a window manager issue?
Is there something I can do to make the maximize box show up? (My real dialog has a bunch of scrolled text from a log file and it's easier to click maximize than it is to manually resize to fill the screen.)
I'm using:
Linux (Ubuntu 10.04 LTS)
python-wxgtk, libwxgtk2.8-0, libwxbase2.8-0: 2.8.10.1-0ubuntu1.2
metacity: 1:2.30.1-0ubuntu1.1
I found this in the wxWidgets docs:
"Under Unix or Linux, MWM (the Motif Window Manager) or other window managers recognizing the MHM hints should be running for any of these styles ( including wxMAXIMIZE_BOX ) to have an effect."
So it sounds like it might well be a window manager issue.
I'm prototyping GUI layout with PyGTK, sometimes using glade/builder sometimes not, and the following scene repeats endlessly:
Modify the code
Run the GUI script
Judge the result
Modify again
Run again...
So, since I heard that Python allows reloading of modules, I would like to know if it is possible to modify the code WITHOUT CLOSING THE WINDOW, and then, from the window itself, say, clicking on a button, "reload" the window reflecting the changes in code.
Since it is a conceptual question, I don't have any specific code to show.
Thanks for the attention
I think it is possible if you do the following:
Identify and isolate the widget W that you want to see updated when you press the button (if you want to see the whole window updated, then make it whatever you add in the window, not the window itself).
Write a function (or class) that creates and returns this widget
Put this function or class in a module that you will reload
Create your button outside W and connect it to a function that does the following
Remove current W from window
Reload the module
Create new instance of W
Add it to the window
Of course, the critical step here is "reload the module". I guess you have to make sure no code from the module is running and no other module depends on variables defined on this module.
EDIT: I had some time, so I made a little prototype. Change the label in widget_module.py and then hit Update
gui.py
# Load in pygtk and gtk
import pygtk
pygtk.require('2.0')
import gtk
import widget_module
# Define the main window
class Whc:
def __init__(self):
# Window and framework
self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
self.window.connect("destroy", self.destroy)
# A Button, with an action
# Add it to the geometry
# show the button
self.button = gtk.Button("Update")
self.button.connect("clicked", self.update, None)
self.vbox = gtk.VBox()
self.vbox.pack_start(self.button)
self.widget = widget_module.get_widget()
self.vbox.pack_start(self.widget)
self.window.add(self.vbox)
# Show the window
self.window.show_all()
# Callback function for use when the button is pressed
def update(self, widget, data=None):
print "Update"
self.vbox.remove(self.widget)
reload(widget_module)
self.widget = widget_module.get_widget()
self.vbox.pack_start(self.widget)
self.widget.show()
# Destroy method causes appliaction to exit
# when main window closed
def destroy(self, widget, data=None):
gtk.main_quit()
# All PyGTK applicatons need a main method - event loop
def main(self):
gtk.main()
if __name__ == "__main__":
base = Whc()
base.main()
widget_module.py
import pygtk
import gtk
def get_widget():
return gtk.Label("hello")