implementing-wpf-adorners
WPF Adorner Patterns
Adorner is a mechanism for overlaying decorative visual elements on top of UIElements.
1. Adorner Concept
1.1 Characteristics
- AdornerLayer: Separate rendering layer that holds Adorners
- Z-Order: Always renders above the adorned element
- Layout Independent: No effect on target element's layout
- Event Support: Can receive mouse/keyboard events
1.2 Usage Scenarios
| Scenario | Description |
|---|---|
| Validation Display | Input field error display |
| Drag Handles | Element move/resize handles |
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