Writing in Python 2.7 using pyQt 4.8.5:
How may I alter the background and graph-area (foreground?) of a Matplotlib widget? I would like to make the background of the graph widget 'light gray' (same as the background colour of the GUI), and I would like to make the graph-area (see below) black.
I'm new to GUI programming with pyQt and would like to achieve this:
my code:
self.ui.graph.axes.clear()
self.ui.graph.axes.hold(True)
self.ui.graph.axes.plot(self.Value,'r-')
self.ui.graph.axes.grid()
self.ui.graph.draw()
This should do it:
ax = self.ui.graph.axes
ax.set_axis_bgcolor('k')
self.ui.graph.set_facecolor('none')
This did only partly work for me. The two first lines worked fine but the last did not work. The error I got was:
AttributeError: 'MatplotlibWidget' object has no attribute 'set_facecolor'
The solution was to add figure to the code:
ax = self.ui.graph.axes
ax.set_axis_bgcolor('k')
self.ui.graph.figure.set_facecolor('none')
An interesting note is that I had been trying to solve this problem by using setPalette() but this didn't work until the facecolor was set to 'none' then suddenly all the changes I had made to the palette showed up.
Related
I am trying to capture a part of my screen with PIL.ImageGrab and then converting it to an numpy.array as you can see below.
np.array(ImageGrab.grab(bbox=(0, 0, 720, 480)))
What I can't figure out is, how to get this data into a Kivy window or a widget?
All my Widgets are in separate classes so I would like to have one Screen class with all the code necessary for this part of my Window.
I have already tried methods like this one, but I don't know how to implement it since Kivy confuses me a lot sometimes.
If my idea just isn't realizable, I guess you could save each captured frame as .jpg format and then load it into Kivy. But I imagine this is not the most efficient way.
Thanks a lot in advance! Dominik
Setup: Anaconda 3 (Win10 64), Spyder 4 and Python 3.7. The IPython Graphics setting is default (Inline).I'm still a new to Python but I've looked around and have not found an answer that solves my problem so far. Thanks everyone in advance.
So in this setup, whenever I create a plot using matplotlib, it appears in the plot pane of Spyder. e.g.
import pandas as pd
import matplotlib.pyplot as plt
import numpy as np
df = pd.DataFrame(np.random.randint(0,100,size=(100, 1)), columns=list('A'))
bp = df.boxplot(column = 'A')
creates a boxplot. Now, if I want to add a title to the plot, the code would be
bp.set_title("This Title")
This is where I'm getting some problems. If I run the entire block together
df = pd.DataFrame(np.random.randint(0,100,size=(100, 1)), columns=list('A'))
bp = df.boxplot(column = 'A')
bp.set_title("This Title")
then I get a box plot with "This Title" as the title, showing up in the plot pane,
which is what I want.
However, if I run the above code line by line in the IPython console, the 2nd line will produce a boxplot as expected, but the 3rd line will not have an effect on the image in the plot pane, so the image in the plot pane still do not have a title
Now,if i go to Tools > Preference >IPython Console > Graphics and set the graphics backend to Automatic instead of the default Inline, then when I run the code in the Console line by line, I get an image that pops up in another window, and that it does update/refreshes based on new lines entered into the console. I understand that the inline plots are supposed to be static, but I thought I saw another post where someone said that it is possible to update inline plots? So now my questions are:
Do plots only update/refresh by line codes in the IPython console if the Graphics Backend is not static like inline?
Why do I get different result when I run code blocks vs line by line?
If it is possible to update the inline plots (preferably in the plot pane of Spyder), how do you do it? I've tried various methods to redraw the plots,for example
plt.show()
plt.draw()
bp.get_figure().canvas.draw()
but none of these updates the image in the plot pane. I figured that even if I can't update the image, I should at least be able to redraw it (i.e a 2nd image appears in the plot pane with the update characteristics). But nothing I've tried worked so far. Please advise and thanks again.
(Spyder maintainer here) About your questions:
Do plots only update/refresh by line codes in the IPython console if the Graphics Backend is not static like inline?
Correct.
Why do I get different result when I run code blocks vs line by line?
Because when you run code cells (which is what I think you mean by "code blocks") your plot is shown at the end of that code and hence it takes all modifications you've done to it in intermediate lines.
If it is possible to update the inline plots (preferably in the plot pane of Spyder), how do you do it?
No, it's not possible. As you correctly mentioned above, inline plots are static images, so they can't be modified.
I want to be able to have the Python program itself transparent, but all I could find was running other programs and making them transparent, which is not what I want to do. I just want to make the Python program itself transparent using the win32 module.
So after playing around with a test i did in pygame and reading the answer from here: https://stackoverflow.com/questions/4549213/make-a-window-transparent-using-win32
I managed to get it to work and I also can change colour with colorama so that's good. Here's my code:
import win32gui,win32api,win32con
hwnd = win32gui.FindWindow(None, title)
win32gui.SetWindowLong(hwnd, win32con.GWL_EXSTYLE, win32gui.GetWindowLong(hwnd, win32con.GWL_EXSTYLE) | win32con.WS_EX_LAYERED)
win32gui.SetLayeredWindowAttributes(hwnd, win32api.RGB(0,0,0), 180, win32con.LWA_ALPHA)
So for some strange reason whenever i try to make the program transparent before my loop starts in my program I get a error about "invalid window handle". I do change the program title but I change it before i try the transparency and i update the title with the trancparancy.
I am making a game, and I want it to be fullscreen. However, the pygame fullscreen is strange, creating a screen too large. So I referred to this: Pygame FULLSCREEN Display Flag Creates A Game Screen That Is Too Large For The Screen. However, when I followed these instructions
import ctypes
ctypes.windll.user32.SetProcessDPIAware()
true_res = (ctypes.windll.user32.GetSystemMetrics(0), ctypes.windll.user32.GetSystemMetrics(1))
pygame.display.set_mode(true_res,pygame.FULLSCREEN)
from an answer (but instead using pywin32 instead of ctypes, like this: win32api.GetSystemMetric(0)).
I used this, and while it does create a fullscreen, it also creates a black border around my screen and enlarges everything a slight bit, including my cursor. How can I get rid of this black border and get all shapes to normal size? Or is there a better way to create a good fullscreen?
If it helps, I use Windows 10.
Thanks in advance!
I think the problem of enlarging everything arose with the use of ctypes module as because the ctypes module makes use of a function named as GetSystemMetrics() whose work is to get the size of the screen of your system.
And might be the import pygame is loading some dll that is not compatible with a dll that windll needs.
So I suggest either you update the ctype library or pygame library or update both libraries or you can enlarge screen size by providing custom width and height values according to the resolution supported by your system.
Hope this helps !!
I am making a widget with Tkinter in python 3.4. For some reason, I cannot change a label's background color from the default grey. The code for the label is something like this:
self.label = ttk.Label(master, text="Label Text",
foreground="blue", background="yellow")
Everything else works fine. I can change the foreground (text) color, however the background will not change, whether I am using label.config(), label['background'], or whatever.
I can change the background if I write it for Python 2.7, but I am using tutorials for Tkinter in 3.4, so this is undesirable.
This bug is caused by the 'aqua' ttk style on Mac OSX. It also breaks 'ttk.Progressbar' when set to 'indeterminate' mode. To fix both issues insert the following code after 'root = Tk()' to change the style ...
style = ttk.Style()
style.theme_use('classic') # Any style other than aqua.
This solution was posted by dietrich41
here : http://www.python-forum.org/viewtopic.php?f=12&t=16212
I tested it on a Mac running Python 3.4.1.