Writing Widget

Writing a New Widget

1. Create a class that inherits from the base widget class:

class MyWidget(BaseWidget):
    validation_schema = VALIDATION_SCHEMA
    def __init__(self, label: str, label_alt: str, container_padding: dict[str, int], animation: dict[str, str]):
        super().__init__(class_name="my-widget")
        # Your initialization code here

2. Define options, callbacks, and layout:

• Add your constructor parameters (e.g., labels, icons, update intervals).
• Handle animations, container padding, or special keys.

3. Set up the widget container and layout:

self._widget_container_layout = QHBoxLayout()
self._widget_container_layout.setContentsMargins(self._padding['left'], self._padding['top'], self._padding['right'], self._padding['bottom'])
self._widget_container = QWidget()
self._widget_container.setLayout(self._widget_container_layout)
self.widget_layout.addWidget(self._widget_container)

4. Use _create_dynamically_label() for dynamic labels:

• This method allows you to create labels with icons and text dynamically.

self._create_dynamically_label(self._label_content, self._label_alt_content)

• Example of _create_dynamically_label() method:

 """
 This method creates dynamic QLabel widgets from text content that may include HTML span elements.

 # Parameters
 - `content` (str): The primary content string to display, which may contain HTML spans with class attributes.
 - `content_alt` (str): An alternative content string to create hidden labels for later use.

 # Behavior
 1. The method parses both content strings, splitting them at span tags.
 2. For each part:
     - If it's a span element, it extracts the class name and text content.
     - If it's plain text, it creates a standard label with class "label".
 3. All labels are:
     - Center-aligned
     - Given a pointing hand cursor
     - Added to the widget container layout
 4. Labels from `content` are visible by default.
 5. Labels from `content_alt` are hidden by default.

 # Returns
 The method stores two lists as instance variables:
 - `self._widgets`: Visible labels created from the primary content
 - `self._widgets_alt`: Hidden labels created from the alternative content
 """

 def _create_dynamically_label(self, content: str, content_alt: str):
     def process_content(content, is_alt=False):
         label_parts = re.split('(<span.*?>.*?</span>)', content)
         label_parts = [part for part in label_parts if part]
         widgets = []
         for part in label_parts:
             part = part.strip()
             if not part:
                 continue
             if '<span' in part and '</span>' in part:
                 class_name = re.search(r'class=(["\'])([^"\']+?)\1', part)
                 class_result = class_name.group(2) if class_name else 'icon'
                 icon = re.sub(r'<span.*?>|</span>', '', part).strip()
                 label = QLabel(icon)
                 label.setProperty("class", class_result)
             else:
                 label = QLabel(part)
                 label.setProperty("class", "label")
             label.setAlignment(Qt.AlignmentFlag.AlignCenter)
             label.setCursor(Qt.CursorShape.PointingHandCursor)
             self._widget_container_layout.addWidget(label)
             widgets.append(label)
             if is_alt:
                 label.hide()
             else:
                 label.show()
         return widgets
     self._widgets = process_content(content)
     self._widgets_alt = process_content(content_alt, is_alt=True)

5. Create validation schema for your widget options:

• validation files are located in src/core/validation/widgets/

from core.validation.widgets.yasb.my_widget import VALIDATION_SCHEMA

class MyWidget(BaseWidget):
    validation_schema = VALIDATION_SCHEMA

6. Use real-world examples for reference:

• CustomWidget
• ApplicationsWidget
• HomeWidget
• 'CPU

7. Register callbacks and methods:

self.register_callback("toggle_label", self._toggle_label)

• Implement your logic within these callbacks.

8. Reference your new widget in your configuration:

my_widget:
    type: "yasb.my_widget.MyWidget"
    options:
        label: "<span>\ue71a</span>"
        container_padding:
            top: 0
            left: 0
            bottom: 0
            right: 0
        animation:
            enabled: true
            type: "fadeInOut"
            duration: 200

9. Test your widget:

• Ensure it behaves as expected in the application.
• Check for any errors or issues in the console.
• Validate the widget's functionality with different configurations.
• Ensure the widget is responsive and works well with different screen sizes.
• Be sure that the widget does not cause any memory leaks or performance issues.
• Use thread-safe methods for any background tasks or long-running processes.
• Ensure that the widget does not block the main thread and remains responsive to user interactions.

10. Document your widget:

• Write clear documentation for your widget, including its purpose, options, and styling.
• Doc file should be located in docs/ folder and linked in the main documentation and readme.

11. Submit PR:

• Once your widget is complete and tested, submit a pull request to the main repository.
• Ensure that your code follows the project's coding standards and guidelines.
• Include a description of your changes and any relevant information for reviewers.
• Address any feedback or changes requested by reviewers.