I am using tkinter.filedialog.askopenfilename in Python to select a file. How do I change the font size for the file list displayed? I have found answers on StackOverflow on how to change the font of some items on the display (for example here), but do not know the name of the ttk widget that is used for the file list.
Related
I found the possibility to make a stippled line in Python tkinter. (Seen here: Canvas Line Objects)
It states that I need a bitmap file and define stipple=bitmap_file
I tried this in:
# Import the required libraries
from tkinter import *
# Create an instance of tkinter frame or window
win=Tk()
# Set the size of the tkinter window
win.geometry("700x350")
# Create a canvas widget
canvas=Canvas(win, width=500, height=300)
canvas.pack()
# Add a line in canvas widget
canvas.create_line(100,200,200,35, stipple='#CheckedLine.bmp', fill='red', width=5)
win.mainloop()
However, the console then says:
_tkinter.TclError: error reading bitmap file "CheckedLine.bmp"
Can someone help?
The page linked to in the OP, also links to a detailed description of what they meant by a "bitmap", they never mention it to be a file but rather a bitmap.
stipple
To draw a stippled line, set this option to a bitmap that specifies
the stippling pattern, such as stipple='gray25'. See Section 5.7,
“Bitmaps” for the possible values.
Section 5.7 details about the files to be used -:
The graphic above shows Button widgets bearing the standard bitmaps.
From left to right, they are 'error', 'gray75', 'gray50', 'gray25',
'gray12', 'hourglass', 'info', 'questhead', 'question', and 'warning'.
You can use your own bitmaps. Any file in .xbm (X bit map) format will
work. In place of a standard bitmap name, use the string '#' followed
by the pathname of the .xbm file.
For more information on the .xbm format this may be useful.
Some image viewers/converters, e.g., XnView, FFmpeg and IrfanView,
support XBM. A 48×48 XBM can be converted to Ikon and eventually
X-Face with Netpbm tools.
ImageMagick supports converting images both to and from XBM. GIMP
may be used to create or modify images using the XBM format, and also
supports converting images to and from the XBM format.
NOTE:
Incase, you use the standard bitmaps as listed above and in the link provided, they render to look like this -:
I'm trying to use a custom ttf font not installed in the system for text element in the matplotlib figure.
with plt.style.context('mplparams.mplstyle'):
plt.plot(np.sin(np.linspace(0, 3 * np.pi)), '-o')
I know I can change the text properties with FontManager but I'm looking for a solution which only involves an external config file.
At the moment I only know that i can change font.sans-serif to a font name, not font path.
Is this possible?
The font to be used has to be known to the Fontmanager, otherwise you cannot get it into the plot. In order to specify a font through rcParams this font must be found in a folder matplotlib would look for it. In case you don't want to install anything, you may copy the .ttf file to the matplotlib font folder. In my case this is
python\Lib\site-packages\matplotlib\mpl-data\fonts
Then you need to clear the font.chache. Find out its path via print(matplotlib.get_cachedir()) and delete the fontList files. (Or make a backup first if you like).
Then run your script which has the rcParam specified
font.sans-serif : <name of font>
or use
plt.rcParams['font.sans-serif'] = "<name of font>"
Also see this question.
Having a difficult time trying to get the proper .ttf file from the font family.
Currently trying to use pygame to work on some graphics and it has its own internal search function to find a font file from the Font Family but it's not correct.
Also tried using matplotlib.font_manager. This also is not correct.
import matplotlib.font_manager as font_manager
import pygame
pygame.font.init()
print(font_manager.findfont('Segoe UI'))
> C:\WINDOWS\Fonts\seguisb.ttf
print(pygame.font.match_font('Segoe UI'))
> C:\WINDOWS\Fonts\segoeuil.ttf
print(font_manager.findfont('Arial'))
> C:\WINDOWS\Fonts\arial.ttf
print(pygame.font.match_font('Arial'))
> C:\WINDOWS\Fonts\ARIALN.TTF
I'm hoping there's something I missed and there is a way to get a complete match on the search, not a partial match (I'm guessing both methods used are reading the byte array and returning the closest matching font based on the Family. I.e., 'Segoe UI' is in 'Segoe UI Bold' so it was returned as the match).
I recommend to use pygame.font.SysFont():
Return a new Font object that is loaded from the system fonts. The font will match the requested bold and italic flags. Pygame uses a small set of common font aliases. If the specific font you ask for is not available, a reasonable alternative may be used. If a suitable system font is not found this will fall back on loading the default pygame font.
For a webapp I need a way to prevent that a browser falls back to another font if my web font doesn't include a character. It seems the only way to do this is to add another font to the fontstack which includes "all" possible characters 1.
There are already existing fallback fonts, but those are more debug helpers as they show the codepoint as number, therefore they are much to heavy (>2MB).
The fallback font for my usecase should just show something like a box to signal a missing character.
My idea was to generate a simple font with only one glyph and apply a feature file which will replace all glyphs with this one.
My script for fontforge:
import fontforge
import fontTools.feaLib.builder as feaLibBuilder
from fontTools.ttLib import TTFont
font_name = 'maeh.ttf'
font = fontforge.font()
glyph = font.createChar(33, "theone")
pen = glyph.glyphPen()
pen.moveTo((100,100))
pen.lineTo((100,500))
pen.lineTo((500,500))
pen.lineTo((500,100))
pen.closePath()
for i in range(34, 99):
glyph = font.createChar(i)
glyph.width=10
font.cidConvertTo('Adobe', 'Identity', 0) # doesn't make a difference
font.generate(font_name)
font = TTFont(font_name)
feaLibBuilder.addOpenTypeFeatures(font, 'fallback.fea')
font.save("fea_"+font_name)
My feature file:
languagesystem DFLT dflt;
#all=[\00035-\00039];
##all=[A-Z] this works
feature liga {
sub #all by theone;
} liga;
But the above results in a
KeyError: ('cid00037', 'SingleSubst[0]', 'Lookup[0]', 'LookupList')
with changing numbers for cid00037.
If I use the out commented A-Z from the Feature file it works, so this approach doesn't seem to be completely wrong.
Why can't fonttools find the glyphs if I specify the range in CID notation?
Is there another way to crate a class for the OpenType feature file which includes all glyphs?
While working on the above problem, somebody hinted me to the Adobe NotDef font, which is pretty much what I was looking for. For some reason I wasn't able to convert the .otf of the Adobe NotDef to woff or woff2 with fontforge. Also all the online tools to create the web font files like fontsquirrel failed. To create the woff file I used sfnt2woff from the woff-tools package. For the woff2 file I used https://github.com/google/woff2.
I am trying to create PDF editing prototype using PdfTron software.
I have successfully created interface where user can click on image, created from PDF, select region and will be presented a text input where he/she can then enter text, that will replace the content in PDF file.
Now the text replacing part is problematic. Since there is no API doc for Python (only examples) I am following Java / Android API documentation.
Where I am for now. I have following code to find out the elements that are in user selected rectangle. Values x1, y1, x2, y2 are PDF coordinates based on user selection in the front end.
rect = Rect(x1, y1, x2, y2)
text = ''
extractor = TextExtractor()
extractor.Begin(page)
line = extractor.GetFirstLine()
words = []
while line.IsValid():
word = line.GetFirstWord()
while word.IsValid():
elRect = word.GetBBox()
elRect.Normalize()
if elRect.IntersectRect(elRect, rect):
text += ' ' + word.GetString()
words.append(word)
word = word.GetNextWord()
line = line.GetNextLine()
words is basically array where I store the content that will later need to be replaced for new element.
Now the problem. I want the new element have the same style and font that the old text has.
Api (link) tells me that using
style = words[0].GetStyle()
gives me style of the word and I can get font from style using
font = style.GetFont()
doc : https://www.pdftron.com/pdfnet/mobile/docs/Android/pdftron/PDF/TextExtractor.Style.html
But this returned font is of Obj class not Font class.
And apparently creating new text element with font requires object of Font class.
Because
element = eb.CreateTextBegin(font, 10.0);
generates an error:
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "/home/alan/.virtualenvs/pdfprint/local/lib/python2.7/site-packages/PDFNetPython2.py", line 5056, in CreateTextBegin
def CreateTextBegin(self, *args): return _PDFNetPython2.ElementBuilder_CreateTextBegin(self, *args)
NotImplementedError: Wrong number or type of arguments for overloaded function 'ElementBuilder_CreateTextBegin'.
Possible C/C++ prototypes are:
pdftron::PDF::ElementBuilder::CreateTextBegin(pdftron::PDF::Font,double)
pdftron::PDF::ElementBuilder::CreateTextBegin()
Perhaps there is better approach to achieving same result?
Edit1
Reading docs I found that you can create Font object based on Object like:
font = Font(style.GetFont())
Still stuck on creating element with those styles though.
/edit1
Edit2
I use following code to test writing into file:
style = elements[0].GetStyle()
font = Font(style.GetFont())
fontsize = style.GetFontSize()
eb = ElementBuilder()
element = eb.CreateTextBegin(font, 10.0)
writer.WriteElement(element)
element = eb.CreateTextRun('My Name')
element.SetTextMatrix(10, 0, 0, 10, 100, 100)
gstate = element.GetGState()
gstate.SetTextRenderMode(GState.e_fill_text)
gstate.SetStrokeColorSpace(ColorSpace.CreateDeviceRGB())
gstate.SetStrokeColor(ColorPt(1, 1, 1))
element.UpdateTextMetrics()
writer.WriteElement(element)
writer.WriteElement(eb.CreateTextEnd())
writer.End()
from core.helpers import ensure_dir
ensure_dir(output_filename)
doc.Save(output_filename, SDFDoc.e_linearized)
doc.Close()
What I cant figure out is:
How to copy styles from existing element.
How to position new element in document.
Why this test code does not give me visible results. As far as I see new file gets created by it does not have "My Name" anywhere in it.
/Edit2
Based on the code above it looks like you want to append some text to an existing page based on the font style (font name + color) used by the first word on the page.
There are couple issue with the above code. You are setting the stroke color rather than fill:
gstate.SetTextRenderMode(GState.e_fill_text)
gstate.SetStrokeColorSpace(ColorSpace.CreateDeviceRGB());
gstate.SetStrokeColor(ColorPt(1, 1, 1))
try
gstate.SetTextRenderMode(GState.e_fill_text)
gstate.SetFillColorSpace(ColorSpace.CreateDeviceRGB());
gstate.SetFillColor(ColorPt(1, 0, 0)) // hardcode to red … for testing purposes only
The main issue is most likely related to Font handling. You are hijacking an existing font and are assuming that this font is using ‘standard encoding’. However this font is likely not using standard encoding. Also fonts in existing PDFs are often sub-setted (this means that the font does not contain a full list of glyphs, but only character references that are present in the document). As a result, you may see notdef or whitespace instead of the expected text. This and some other issues are covered here:
https://groups.google.com/d/msg/pdfnet-sdk/RBTuJG2uILk/pGkrKnqZ_YIJ
https://groups.google.com/d/msg/pdfnet-sdk/2y8s5aehq-c/xyknr9W5r-cJ
As an solution, instead of using embedded font directly you can find a matching system font (e.g. based on font name and other properties) and create a new font. PDFNet offers a utility method Font.Create(doc, font) , or Font.Create(doc, "Font name").
This methods will create a Unicode font so you should use eb.CreateUnicodeTextRun() rather than eb.CreateTextRun().
Alternatively you could use AcroForm as a template (see InteractiveForms sample) and pdfdoc.FattenAnnotations() to end-up with read-only version of the document.