Introduction
When developing a text editor GUI toolkit that isn’t Qt but wants to inherit the color scheme of Qt applications, the best way is to use the KDE’s kreadconfig5 tool. This command-line utility allows you to read configuration files in the KDE format, which is used by Qt applications to store their settings. By reading the color scheme settings from these configuration files, you can ensure that your text editor will use the same colors as other Qt applications on the user’s system.
Understanding KDE Configuration Files
KDE configuration files are simple text files that store key-value pairs. They are usually located in the ~/.config/ directory and have a .conf file extension. Each configuration file represents a different application or aspect of the KDE desktop environment.
The color scheme settings for Qt applications are stored in the colors-system configuration file, which is located in the ~/.config/kdeglobals file. This file contains key-value pairs that define the different colors used in the color scheme, such as the background color, text color, and link color.
Example KDE Configuration File
Here is an example of what a KDE configuration file might look like:
[General]
BackgroundColor=#ffffff
TextColor=#000000
LinkColor=#0000ff
Using kreadconfig5
To use kreadconfig5 to read the color scheme settings from the colors-system configuration file, you can use the following command:
kreadconfig5 --file ~/.config/kdeglobals --group General --key BackgroundColor
This command will return the value of the BackgroundColor key in the General group of the colors-system configuration file. You can use similar commands to read the other color settings that you need for your text editor.
Implementing Color Scheme Inheritance
To implement color scheme inheritance in your text editor, you can write a function that calls kreadconfig5 to read the color scheme settings from the colors-system configuration file. This function can then set the colors of your text editor’s user interface elements to match the colors specified in the configuration file.
Here is an example of how this function might look in Python:
import subprocess
def read\_kde\_color\_scheme():
# Read the background color from the configuration file
background\_color = subprocess.check\_output(
['kreadconfig5', '--file', '~/.config/kdeglobals', '--group', 'General', '--key', 'BackgroundColor']
).decode().strip()
# Read the text color from the configuration file
text\_color = subprocess.check\_output(
['kreadconfig5', '--file', '~/.config/kdeglobals', '--group', 'General', '--key', 'TextColor']
).decode().strip()
# Set the colors of the text editor’s user interface elements
# to match the colors specified in the configuration file
# ...
By using the KDE kreadconfig5 tool, you can easily implement color scheme inheritance in your text editor GUI toolkit, even if it isn’t based on Qt. This will ensure that your text editor uses the same colors as other Qt applications on the user’s system, providing a consistent and familiar user experience.