qtsasstheme

Set the Qt theme (e.g. darkgray/lightgray/darkblue/lightblue) easily

This is using SCSS to set the light/dark theme to PyQt GUI, which is quite efficient.

Old name of this is qt-sass-theme-getter.

Setup

• git clone ~ (recommended)
• python -m pip install qtsasstheme - install as pypi package (good for test only)

Using with pyinstaller

1. make main.py inside the qtsasstheme directory
2. python -m PyInstaller main.py --add-data "qt_sass_theme;./qt_sass_theme" (if your main script is main.py)
3. go to the dist/test folder and start the *.exe file

Included Packages

• qtpy - support pyqt5/pyside2/pyqt6/pyside6
• qtsass - for converting sass into css

Detailed Description

Method Overview

getThemeFiles(theme: str = 'dark_gray', font=QFont('Arial', 9), background_darker=False, output_path=os.getcwd())

Currently there are 4 official theme being supported:

• dark_gray
• dark_blue
• light_gray
• light_blue

You can also make your own theme with customizing theme.

background_darker decides whether the background color is going to be darker than general widget color or not.

If that is set to True, background color is darker than general widget color. See image below.

If that is set to False(which is set by default), background color is lighter than general widget color. See image below.

output_path is the path that 'res' directory will be made which is holding a bunch of theme files after you called getThemeFiles.

'res' directory looks like below.

ico directory holds icon files which will be being used in theme. For example, light icons will be being used in dark theme, dark icons will be being used in light theme. _icons.scss makes sass files in sass directory refer to icons in this directory.

sass directory holds the scss files which will be converted into css files.

var directory holds the _variables.scss which contains the color(e.g. color of background/widget/border...) variables.

---

setThemeFiles(main_window: QWidget, input_path='res')

Right after calling getThemeFiles, you can set the style with calling setThemeFiles.

After calling it, 'res' directory looks like this:

scss files successfully convert into css files.

Note: Don't change the current directory with function such as os.chdir after calling getThemeFiles and before calling setThemeFiles. FileNotFoundError will be most likely occurred.

Customizing Theme

There are two ways to customize theme.

1. Giving color string to getThemeFiles

You can give the 6-digit hex string(e.g. #FF0000) to getThemeFiles's theme argument.

In this case, widget's color will be set based on the hex color you given.

This is the way how to do it:

//..
app = QApplication(sys.argv)
w = SampleWidget()
g = QtSassTheme()
g.getThemeFiles(theme='#6f495f')
g.setThemeFiles(w)
w.show()
app.exec()

2. Modify _variables.scss's color directly

This is the way how to do it:

1. Calling getThemeFiles

g = QtSassTheme()
g.getThemeFiles() 

'res' directory like above will be generated. You can see _variables.scss.

2. Change the variables

open the _variables.scss and change the $bgcolor's value.

This is _variables.scss's contents(dark-gray theme).

$bgcolor: #555555;
$widgetcolor: darken($bgcolor, 10);
$altwidgetcolor: lighten($widgetcolor, 18);
$textcolor: #DDDDDD;
$hovercolor: lighten($widgetcolor, 6);
$bordercolor: lighten($widgetcolor, 20);
$selectcolor: darken($widgetcolor, 6);
$disabledcolor: #AAAAAA;
$textwidgetcolor: darken($widgetcolor, 12);
$scrollhandlecolor: lighten($widgetcolor, 30);
$splitterhandlecolor: darken($widgetcolor, 10);

You can change any colors.

In this example i will change the $bgcolor from #555555 to #006600(dark-green).

3. Calling setThemeFiles

//..
app = QApplication(sys.argv)
w = SampleWidget()
g = QtSassTheme()
g.setThemeFiles(w)
w.show()
app.exec()

Example

Code Sample

from PyQt5.QtWidgets import QApplication
# from PyQt6.QtWidgets import QApplication
# from PySide2.QtWidgets import QApplication
# from PySide6.QtWidgets import QApplication
from pyqt_timer.settingsDialog import SettingsDialog
from qt_sass_theme import QtSassTheme

if __name__ == "__main__":
    import sys

    app = QApplication(sys.argv)
    widget = SettingsDialog()
    g = QtSassTheme()
    g.getThemeFiles(theme='dark_gray')
    # g.getThemeFiles(theme='dark_blue') - if you want to set dark blue theme
    g.setThemeFiles(main_window=widget)
    widget.show()
    app.exec()

Result

Preview widget is pyqt-timer's settings dialog.

Dark gray theme

Dark blue theme

Light gray theme

Light blue theme