I'm developing a calendar application
The top level window is a frame containing a panel that displays the calendar grid and a panel that contains a "Close" button.
I'm unable to obtain the size of the calendar grid panel.
When I add code to get the panel size, the result is (20,20), which cannot be correct
The screen size is (1920,1080) so I'm expecting something like (1920, 1000)
When I add the wx.lib.inspection module, I see the correct size being displayed. It is (1920, 968)
Can anyone shed some light how to get the correct size of the panel?
This is the code I have so far
import wx
class DrawFrame(wx.Frame):
def __init__(self):
wx.Frame.__init__(self, parent=None, title='Agenda', style= wx.CAPTION | wx.CLOSE_BOX)
self.drawpanel = DrawPanel(self)
self.buttonpanel = ButtonPanel(self)
self.framesizer = wx.BoxSizer(wx.VERTICAL)
self.framesizer.Add(self.drawpanel,1, flag=wx.EXPAND)
# Add an empty space 10 pixels high above and below the button panel
self.framesizer.Add((0,10),0)
self.framesizer.Add(self.buttonpanel,0, flag=wx.EXPAND)
self.framesizer.Add((0,10),0)
self.SetSizer(self.framesizer)
self.SetInitialSize()
self.Maximize()
self.Show()
def GetPanelSize(self):
return self.drawpanel.GetSize()
def OnClose(self, event):
self.Close()
class DrawPanel(wx.Panel):
# This panel's parent is DrawFrame. DrawFrame is the top level window.
def __init__(self, parent):
wx.Panel.__init__(self, parent=parent)
self.parent = parent
self.Bind(wx.EVT_PAINT, self.OnPaint)
self.x1, self.y1, self.x2, self.y2 = wx.GetClientDisplayRect()
b = self.x1, self.y1, self.x2, self.y2
print b
self.width, self.height = wx.GetDisplaySize()
c = self.width, self.height
print c
def OnPaint(self, event=None):
dc = wx.PaintDC(self)
dc.Clear()
dc.SetPen(wx.Pen(wx.BLACK, 2))
dc.SetBrush(wx.Brush('WHITE'))
"""
DrawRectangle (self, x, y, width, height)
Draw a rectangle with the given corner coordinate and size.
x and y specify the top left corner coordinates and both width and height are positive.
"""
dc.DrawRectangle(self.x1 + 5, self.y1, self.x2 - 10, self.y2 - 60)
dc.DrawLine(40, 100, 600, 100)
class ButtonPanel(wx.Panel):
# This panel's parent is DrawFrame. DrawFrame is the top level window.
def __init__(self, parent):
wx.Panel.__init__(self, parent=parent)
self.parent=parent
self.buttonpanelsizer = wx.BoxSizer(wx.HORIZONTAL)
self.closebutton = wx.Button(self, label = 'Close')
self.Bind(wx.EVT_BUTTON, self.OnClose, self.closebutton)
self.buttonpanelsizer.AddStretchSpacer(prop=1)
self.buttonpanelsizer.Add(self.closebutton, 0, wx.ALIGN_CENTER)
self.SetSizer(self.buttonpanelsizer)
def OnClose(self, event):
self.parent.OnClose(event)
app = wx.App(False)
frame = DrawFrame()
print frame.GetPanelSize()
app.MainLoop()
Much appreciated,
Thanks
You are calling the GetPanelSize too early. Keep in mind that wxPython (and pretty much any GUI framework) is event based. That means that for it to work it must keep processing events, which in case of wxPython means that app.MainLoop() must run. So do not call GetPanelSize before calling app.MainLoop(). Instead, call it when you need it. Do you need it when you paint something? Just use dc.GetSize(). Do you need it elsewhere? Process the wx.EVT_SIZE event and store the current size. Possibly you will have to trigger some action in the EVT_SIZE handler.
I have a question, its more an OS-based one.
I'm playing a video game and I want to be able to put a textual timer ontop of the game's screen as if it was a part of the game itself.
Now, I can write a program in any language that displays a TextBox with a timer on the screen, but if I run it, the game's process (lets call it game.exe) "loses" its focus and I get my TextBox focused and interactive by the OS.
Is there any option to display that text "ontop" of the game.exe that comes from an entire different process? as if there were "layers" to the screen. Also, this text shouldn't be intractable, clickable or make the game.exe process lose its focus.
Here's a very simple example I drew:
Thanks a lot!
Solved this using a window trick with python and tkinter with some windows api stuff.
The trick is to create a transparent non-clickable window and keep it always on top.
I've basically combined this answer with a bunch of simpler stuff like removing window's border and set to auto fullscreen.
from tkinter import *
import time
import win32gui
import win32api
from win32api import GetSystemMetrics
# WIDTH = 500
# HEIGHT = 500
WIDTH = GetSystemMetrics(0)
HEIGHT = GetSystemMetrics(1)
LINEWIDTH = 1
TRANSCOLOUR = 'gray'
title = 'Virtual whiteboard'
global old
old = ()
global HWND_t
HWND_t = 0
tk = Tk()
# tk.title(title)
tk.lift()
tk.wm_attributes("-topmost", True)
tk.wm_attributes("-transparentcolor", TRANSCOLOUR)
tk.attributes('-fullscreen', True)
state_left = win32api.GetKeyState(0x01) # Left button down = 0 or 1. Button up = -127 or -128
canvas = Canvas(tk, width=WIDTH, height=HEIGHT, highlightthickness=0)
canvas.pack()
canvas.config(cursor='tcross')
canvas.create_rectangle(0, 0, WIDTH, HEIGHT, fill=TRANSCOLOUR, outline=TRANSCOLOUR)
canvas.create_text(WIDTH/2,HEIGHT/2,fill="white",font="Arial 20", text="TEXT GOES HERE")
def putOnTop(event):
event.widget.unbind('<Visibility>')
event.widget.update()
event.widget.lift()
event.widget.bind('<Visibility>', putOnTop)
def drawline(data):
global old
if old !=():
canvas.create_line(old[0], old[1], data[0], data[1], width=LINEWIDTH)
old = (data[0], data[1])
def enumHandler(hwnd, lParam):
global HWND_t
if win32gui.IsWindowVisible(hwnd):
if title in win32gui.GetWindowText(hwnd):
HWND_t = hwnd
win32gui.EnumWindows(enumHandler, None)
tk.bind('<Visibility>', putOnTop)
tk.focus()
running = 1
while running == 1:
try:
tk.update()
time.sleep(0.01)
if HWND_t != 0:
windowborder = win32gui.GetWindowRect(HWND_t)
cur_pos = win32api.GetCursorPos()
state_left_new = win32api.GetKeyState(0x01)
if state_left_new != state_left:
if windowborder[0] < cur_pos[0] and windowborder[2] > cur_pos[0] and windowborder[1] < cur_pos[1] and windowborder[3] > cur_pos[1]:
drawline((cur_pos[0] - windowborder[0] - 5, cur_pos[1] - windowborder[1] - 30))
else:
old = ()
except Exception as e:
running = 0
print("error %r" % (e))
Ok, so I've been tasked with creating a VERY simple GUI at work (I'm an intern). The task is to eventually connect to a machine and process real data, but right now I'm working on randomly generated sine data with noise. I've chose to work in Python 3.0, and use wxpython to create my GUI components.
As I want everything to appear on the same window, I'm using panels (hence wx.lib.plot.PlotCanvas rather than something like matplotlib.pyplot)
The problem that I have is that over time, the plot seems to 'expand' off of the panel. This is temporarily solved when I manually resize the window, but resumes again immediately after (you need to run the code to see what I mean).
Expansion over time in panel
Another problem (that has bugged me since I have started writing the code) is that sometimes when I resize the window (manually) or minimize it and then maximize it again, the timer randomly starts and stops.
I have tried all sorts of things (changing padding in sizers, extra arguments, changing time between refreshes GetBestSize()) but I believe that I simply don't understand wxpython well enough to identify where the problem is
I would really appreciate any help you can shed on either of these problems (I don't know, they might even be linked to each other).
FYI: I am not an experienced coder, and my code is not finished (I have more functions to code, but I feel like I should resolve this first). I have constructed this code by looking at different techniques from various tutorials and websites like stackoverflow, so I know it's not formatted well and could definitely be made more efficient. Also, I have removed some parts just to be safe about confidentiality - nothing important, just strings in messages.
PS: If you do have an easier way to do the whole plot/update thing that doesn't have this problem (preferably still in wx) I would be thrilled to hear that as well
And here's my code:
EDIT: Solved the expanding problem by using self.p2.SetSize((W+0,L+0)) instead of (self.p2.GetBestSize())
EDIT: Made transitions much smoother by just regenerating data and redrawing it on existing canvas in the evt_timer function (instead of recreating the whole canvas, which gave a blink-y appearance if you know what I mean)
import wx
import numpy as np
import matplotlib.pyplot as plt
from scipy.optimize import leastsq
import wx.lib.plot as plot
import time
import os
wildcard = "Text File (*.txt)|*.txt|"\
"Picture (*.png)|*.png|"\
"All files (*.*)|*.*"#This wildcard shows the options for file endings in the "SAVE" tab - see OnSave(self,event)
wildcard2 = "Picture (*.png)|*.png|"\
"Text File (*.txt)|*.txt|"\
"All files (*.*)|*.*"
class PlotCanvas(plot.PlotCanvas):
def __init__(self,parent,id,size,accepted):
"""
This randomly generates sine data (with noise) and plots it to a panel.
Incorporated as a separate class instead of instatiating it as a plot.PlotCanvas object
to overcome an issue of the size of the plot in the panel.
"""
plot.PlotCanvas.__init__(self,parent,id,style=wx.BORDER_SUNKEN,size = size)
N = 100 # number of data points
self.t = np.linspace(0, 4*np.pi, N)
f = 1.15247 # Optional!! Advised not to use
self.data = 3.0*np.sin(f*self.t+0.001) + 0.5 + np.random.randn(N) # create artificial data with noise
guess_mean = np.mean(self.data)
guess_phase = 0
guess_freq = 1
guess_amp = 1
optimize_func = lambda x: x[0]*np.sin(x[1]*self.t+x[2]) + x[3] - self.data
est_amp, est_freq, est_phase, est_mean = leastsq(optimize_func, [guess_amp, guess_freq, guess_phase, guess_mean])[0]
fine_t = np.arange(0,max(self.t),0.1)
data_fit=est_amp*np.sin(est_freq*fine_t+est_phase)+est_mean
multiplier = 1
dataset1 = [(x,[d for d in self.data][[td for td in self.t].index(x)])for x in [td for td in self.t]]
fitdata1 = [(x,[df for df in data_fit][[tf for tf in fine_t].index(x)]) for x in [tf for tf in fine_t]]
dataset =[(x,y*multiplier) for (x,y) in dataset1]
fitdata = [(x,y*multiplier) for (x,y) in fitdata1]
self.data = dataset
self.data2 = fitdata
line = plot.PolyLine(self.data,legend = 'random',colour = 'light blue', width =2)
line2 = plot.PolyLine(self.data2,legend = 'sineline',colour ='black',width =2)
a = []
if "D" in accepted:
a.append(line)
if "S" in accepted:
a.append(line2)
if "G" in accepted:
pass
if "L" in accepted:
pass
gc = plot.PlotGraphics(a,'Line Graph','X','Y')
xmin = self.t[0]-0.01*(self.t[-1]-self.t[0])
xmax = self.t[-1]+0.01*(self.t[-1]-self.t[0])
self.Draw(gc,xAxis=(xmin,xmax),yAxis=(min([x[1] for x in dataset])-0.01*(max([x[1] for x in dataset])-min([x[1] for x in dataset])),
max([x[1] for x in dataset])+0.01*(max([x[1] for x in dataset])-min([x[1] for x in dataset]))))
#self.showLegend = True
#self.enableZoom = True
def Dialog(self, parent, message, c):# Will be used to notify the user of errors/processes
if c == "W":
caption = "Warning!"
dlg = wx.MessageDialog(parent, message, caption, wx.OK | wx.ICON_WARNING)
elif c == "I":
caption = "Information"
dlg = wx.MessageDialog(parent, message, caption, wx.OK | wx.ICON_INFORMATION)
dlg.ShowModal()
dlg.Destroy()#Destroys dialog on close
class Frame(wx.Frame):
"""
This is the main class. In it, we declare the separate panels, canvas, menubar, buttons and sizers.
"""
def __init__(self,parent,id,title):
wx.Frame.__init__(self, parent, id, title, wx.DefaultPosition)
self.CurrentDirectory = os.getcwd()
self.timer=wx.Timer(self)#Instantiating the timer
self.count=0
self.Bind(wx.EVT_TIMER,self.evt_timer)#Binding it to itself so that it is always triggered
self.Bind(wx.EVT_PAINT,self.paint)
menubar = wx.MenuBar()
fileMenu = wx.Menu() #Creating the Menubar at the top
#Creating 3 menus: fileMenu,fit,and help
save = wx.Menu()
z = wx.MenuItem(save,wx.ID_ANY,'Save Raw Data\tCtrl+D')
self.Bind(wx.EVT_MENU,self.OnSave,z)
save.Append(z)
z= wx.MenuItem(save,wx.ID_ANY,'Save Image\tCtrl+I')
self.Bind(wx.EVT_MENU,self.OnSaveImage,z)
save.Append(z)
fileMenu.AppendSubMenu(save,'&Save')
fileMenu.AppendSeparator()
z = wx.MenuItem(fileMenu, wx.ID_EXIT, '&Quit\tCtrl+W')
self.Bind(wx.EVT_MENU, self.OnQuit, z)
fileMenu.Append(z)
fit = wx.Menu()#Making a check menu
self.gaussian = fit.Append(wx.ID_ANY,'Gaussian',kind = wx.ITEM_CHECK)
#self.Bind(wx.EVT_MENU,self.ToggleGaussian,self.gaussian)
fit.Check(self.gaussian.GetId(),False)
self.sine = fit.Append(wx.ID_ANY,'Sine',kind = wx.ITEM_CHECK)
#self.Bind(wx.EVT_MENU,self.ToggleSine,self.sine)
fit.Check(self.sine.GetId(),False)
self.linear = fit.Append(wx.ID_ANY,'Linear',kind=wx.ITEM_CHECK)
#self.Bind(wx.EVT_MENU,self.ToggleLinear,self.linear)
fit.Check(self.linear.GetId(),False)
help = wx.Menu()
z = wx.MenuItem(help,wx.ID_ANY,'&About\tCtrl+H')
self.Bind(wx.EVT_MENU,self.OnHelp,z)
help.Append(z)
menubar.Append(fileMenu, '&File')
menubar.Append(fit, '&Fit')
menubar.Append(help, '&Help')#adding menus to menubar
self.SetMenuBar(menubar)#formatting the frame with menubar
self.sp = wx.SplitterWindow(self)#Splitting the window into 2 panels
self.p1 = wx.Panel(self.sp,style = wx.SUNKEN_BORDER)#For buttons and user events
self.p2 = wx.Panel(self.sp,style = wx.SUNKEN_BORDER)#For display of the plot
self.sp.SplitVertically(self.p1,self.p2,300)
sizer = wx.GridBagSizer(3, 3)#Versatile sizer for layout of first panel self.p1
bitmappath = self.CurrentDirectory + "\\BITMAPS"
bmp = wx.Bitmap(bitmappath+"\\SAVE.BMP",wx.BITMAP_TYPE_BMP)
self.saveBtn = wx.BitmapButton(self.p1,wx.ID_ANY,bitmap = bmp,size =(bmp.GetWidth()+10,bmp.GetHeight()+10))
self.Bind(wx.EVT_BUTTON,self.OnSave,self.saveBtn)
sizer.Add(self.saveBtn, (0, 0), wx.DefaultSpan, wx.ALL,5)
bmp = wx.Bitmap(bitmappath +"\\START.BMP",wx.BITMAP_TYPE_BMP)
self.startBtn = wx.BitmapButton(self.p1,-1,bitmap = bmp,size =(bmp.GetWidth()+10,bmp.GetHeight()+10))# A button that starts and stops the plotting
self.startBtn.startval = "START"
self.Bind(wx.EVT_BUTTON,self.paint,self.startBtn)
sizer.Add(self.startBtn, (0, 1), wx.DefaultSpan,wx.ALL,5)
sizer1 = wx.BoxSizer(wx.VERTICAL)
W,L = self.p2.GetSize()
self.p2.canvas = PlotCanvas(self.p2,wx.ID_ANY,(W,L),["D"])
sizer1.Add(self.p2.canvas,1,wx.ALL,0,0)
self.p2.SetSizerAndFit(sizer1)
self.p1.SetSizerAndFit(sizer)
self.p2.SetSizerAndFit(sizer1)
self.p2.SetSize(W,L)
self.Maximize(True)
self.Centre()
self.Show()
############### event methods ###########
def paint(self,event):
"""
Updates the canvas based on the value of the startbtn(not the image). Bound to self.timer.
"""
bitmappath = self.CurrentDirectory + "\\BITMAPS"
if self.startBtn.startval == "START":
self.timer.Start(1)# increase the value for more time
bmp = wx.Bitmap(bitmappath + "\\STOP.BMP",wx.BITMAP_TYPE_BMP)
self.startBtn.SetBitmap(bmp)
self.startBtn.startval = "STOP"
elif self.startBtn.startval == "STOP":
self.timer.Stop()
bmp = wx.Bitmap(bitmappath+ "\\START.BMP",wx.BITMAP_TYPE_BMP)
self.startBtn.SetBitmap(bmp)
self.startBtn.startval = "START"
def evt_timer(self,event):
self.count +=1
if self.count== 10:# By increasing count (or the number in self.timer.Start()) you can increase the interval between updates
#self.p2.canvas.Clear()
sizer1 = wx.BoxSizer(wx.VERTICAL)
W,L = self.p2.GetSize()
a = ["D"]
if self.sine.IsChecked():
a.append("S")
elif self.linear.IsChecked():
a.append("L")
elif self.gaussian.IsChecked():
a.append("G")
self.p2.canvas = PlotCanvas(self.p2,wx.ID_ANY,(W,L),a)
sizer1.Add(self.p2.canvas,1,wx.ALL,0,0)
self.p2.SetSizerAndFit(sizer1)
self.p2.SetSize(self.p2.GetBestSize())
self.count=0 # reset the count
def Dialog(self, parent, message, c):# Will be used to notify the user of errors/processes
if c == "W":
caption = "Warning!"
dlg = wx.MessageDialog(parent, message, caption, wx.OK | wx.ICON_WARNING)
elif c == "I":
caption = "Information"
dlg = wx.MessageDialog(parent, message, caption, wx.OK | wx.ICON_INFORMATION)
dlg.ShowModal()
dlg.Destroy()#Destroys dialog on close
def OnSave(self,event):#Triggered by menubar and button
try:
rawdata = self.p2.canvas.data
raw_X =[x[0] for x in rawdata]
raw_Y =[x[1] for x in rawdata]
dlg = wx.FileDialog(#Code for this from http://www.blog.pythonlibrary.org
self, message="Save file as ...",
defaultDir=self.CurrentDirectory,
defaultFile=str(time.ctime()), wildcard=wildcard, style=wx.FD_SAVE
)
if dlg.ShowModal() == wx.ID_OK:
path = dlg.GetPath()
dlg.Destroy()
f = open(path+".txt","w+")
for i in range(len(raw_X)):
f.write(str(raw_X[i])+"\t"+str(raw_Y[i])+"\n")
f.close()
self.Dialog(None,"File successfully saved","I")
except UnboundLocalError:#Catch error when user closes save window without selecting any directory or filename
pass
def OnSaveImage(self,event):
try:
rawdata = self.p2.canvas.data
raw_X = [x[0] for x in rawdata]
raw_Y = [x[1] for x in rawdata]
dlg = wx.FileDialog(
self, message="Save file as ...",
defaultDir=self.CurrentDirectory,
defaultFile=str(time.ctime()), wildcard=wildcard2, style=wx.FD_SAVE
)
if dlg.ShowModal() == wx.ID_OK:
path = dlg.GetPath()
dlg.Destroy()
fig1 = plt.figure()
plt.plot(raw_X,raw_Y)
plt.title("Raw Data")
fig1.savefig(path+".png")
self.Dialog(None,"File successfully saved","I")
except UnboundLocalError:
pass
def OnMultiply(self,e):
try:
factor = self.x.GetValue()
factor = float(factor)
self.IntegrationTime = factor
except ValueError as e:
self.Dialog(None,str(e),"W")
def OnQuit(self, e):
self.Close()
def OnHelp(self,e):
self.Dialog(None,"N/A","I")
def ToggleSine(self,e):
pass
def ToggleLinear(self,e):
self.Dialog(None,"Not added yet","W")
def ToggleGaussian(self,e):
self.Dialog(None,"Not added yet","W")
if __name__ =="__main__":
app=wx.App()
Frame(None,-1,"N/A")
app.MainLoop()
I run python 2.7.13 on windows 7.
I am creating a window with Gtk (from pygobject 3.18.2).
I am running windows 7 with a custom shell and I am trying to make a toolbar at the bottom of the screen.
I use a grid to divide the window in a top and a bottom part.
The bottom part is always visible.
The top part must show above the bottom part on mouse enter and hide on mouse leave without moving the bottom part.
The default positioning of a window uses the top-left corner of the window, but this will cause the bottom part to shift up to the position of the top part when the top part is hidden.
I think I understand that I have to use
set_gravity(Gdk.Gravity.SOUTH_WEST)
to change this behaviour
I do not get errors, but it seems this setting is ignored. The placement of the window is not affected at all.
What am I missing?
Anything wrong in the way I call set_gravity()?
Is set_gravity the right way to achieve this?
I read Set window gravity in PyGObject?, but this question is still not answered
Here is the code I try to get working
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk, Gdk
class MyWindow(Gtk.Window):
def __init__(self):
Gtk.Window.__init__(self, title="Test")
self.set_decorated(0)
self.screen = Gdk.Screen.get_default()
self.connect("destroy", self.destroy)
self.connect("enter-notify-event", self.mouseenter)
self.connect("leave-notify-event", self.mouseleave)
self.label1 = Gtk.Label("Label1\n line1\n line2")
self.label2 = Gtk.Label("Label2")
self.label1.set_hexpand(True)
self.label2.set_hexpand(True)
self.maingrid = Gtk.Grid()
self.add(self.maingrid)
self.maingrid.attach(self.label1, 0, 0, 1, 1)
self.maingrid.attach(self.label2, 0, 1, 1, 1)
self.set_gravity(Gdk.Gravity.SOUTH_WEST) # looks like this is ignored
print self.get_gravity()
def mouseleave(self, widget, data=None):
print "mouse leave"
self.label1.hide()
label2_height = self.label2.get_allocation().height
self.resize(self.screen.width(), label2_height)
def mouseenter(self, widget, data=None):
print "mouse enter"
label1_height = self.label1.get_allocation().height
label2_height = self.label2.get_allocation().height
self.resize(self.screen.width(), label1_height + label2_height)
self.label1.show()
# Here I expect label2 to stay where it is at the bottom of the screen and label1 to be drawn above label2.
# But label2 is pushed down to make space for label1
# (normal behaviour if Gdk.Gravity.SOUTH_WEST is not set)
def destroy(self, widget, data=None):
print "destroy signal occurred"
Gtk.main_quit()
win = MyWindow()
win.show_all()
win.label1.hide()
height = win.label2.get_allocation().height
win.resize(win.screen.width(), height)
#win.move(0, win.screen.height()) # I expect this to place the window at the bottom of the screen
# if Gdk.Gravity.SOUTH_WEST is set, but it is placed offscreen
# (normal behaviour if Gdk.Gravity.SOUTH_WEST is not set)
win.move(0, win.screen.height() - 200) # shift it up 200 pixels to see what is happening
Gtk.main()
Here is a working version where I move the window to it's proper position after resizing. Moving the window makes the window flicker and it also generates the leave-notify-event and the enter-notify-event.
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk, Gdk
class MyWindow(Gtk.Window):
def __init__(self):
Gtk.Window.__init__(self, title="Test")
self.set_decorated(0)
self.screen = Gdk.Screen.get_default()
# self.set_gravity(Gdk.Gravity.SOUTH_WEST)
self.connect("destroy", self.destroy)
self.connect("enter-notify-event", self.mouseenter)
self.connect("leave-notify-event", self.mouseleave)
self.label1 = Gtk.Label("Label1\n line1\n line2")
self.label2 = Gtk.Label("Label2")
self.label1.set_hexpand(True)
self.label2.set_hexpand(True)
self.maingrid = Gtk.Grid()
self.add(self.maingrid)
self.maingrid.attach(self.label1, 0, 0, 1, 1)
self.maingrid.attach(self.label2, 0, 1, 1, 1)
self.ismoving = 0
def mouseleave(self, widget, data=None):
print "mouse leave"
if self.ismoving:
print "window is moving"
else:
self.label1.hide()
label2_height = self.label2.get_allocation().height
self.resize(self.screen.width(), label2_height)
self.move(0, self.screen.height() - label2_height)
def mouseenter(self, widget, data=None):
print "mouse enter"
if self.ismoving: # moving the window generates a leave-notify-event and a enter-notify-event
self.ismoving = 0 # ignore these events when moving the window
else:
self.ismoving = 1
label1_height = self.label1.get_allocation().height
label2_height = self.label2.get_allocation().height
self.resize(self.screen.width(), label1_height + label2_height)
self.move(0, self.screen.height()-label1_height - label2_height)
self.label1.show()
def destroy(self, widget, data=None):
print "destroy signal occurred"
Gtk.main_quit()
win = MyWindow()
win.show_all()
win.label1.hide()
height = win.label2.get_allocation().height
win.resize(win.screen.width(), height)
win.move(0, win.screen.height() - height)
Gtk.main()
Based on AlexB's comment i assume my code is correct, but it is not working for me. I don't see any reason why it will not run under python 2. Maybe there is an issue with the window manager. I'll investigate
Did anyone succesfully use set_gravity() on windows?
Documentation indicates it may or may not work, depending on Window Manager. It doesn't for me on Xubuntu 18.04
I'm building a small GUI application, that once a button is clicked a new top level window will open and it should display images for buttons.
I can get the image button to work on the root window, but not on the top level window. Only a blackbox appears.
I have a generic button on both windows and they do work.
I'm new to Python.
import Tkinter
from Tkinter import *
from PIL import ImageTk, Image
root = Tkinter.Tk()
root.title("First Window")
root.configure(background = "black")
def new_window():
win2 = Toplevel(root)
win2.geometry("650x350+50+40")
win2.title("Second Window!")
win2.configure(background = "white")
def close1():
win2.destroy()
img1 = ImageTk.PhotoImage(Image.open("./images/close.gif"))
c1 = Button(win2, image = img1, bg ="black", command = close1)
c1.grid(row = 1)
c2= Tkinter.Button(win2, text='close', command = close1)
c2.grid(row = 2)
nw = Tkinter.Button(root, text = 'New Window' , command = new_window)
nw.grid(row = 1)
def close3():
root.destroy()
img3 = ImageTk.PhotoImage(Image.open("./images/close.gif"))
c3 = Button(root, image = img3, bg ="black", command = close3)
c3.grid(row = 2)
root.mainloop()
When you create the new toplevel, you are using a local variable to refer to the image. Because of this, when the method exits, the garbage collector will delete the image. You need to save a reference in a global variable, or some other way to protect it from the garbage collector
A common way to save a reference is to make it an attribute of the button:
img1 = ImageTk.PhotoImage(...)
c1 = Button(...)
c1.image = img1