Feature: QR Code Display Support for Dynamic Label Widgets

Overview

This feature enables Dynamic Label (DL) widgets in Panther to visually render their label text as a QR Code. It supports both design-time and runtime manipulation, allowing applications to dynamically display encoded data.

New Property

Editor Integration

• Appears in the IDENTITY section of the Properties Window as "QR Code".
• Positioned just above the final entry for C Type.
• Internally treated as a string-valued property to allow future expansion (e.g., error correction levels).

Behavior

• When QR Code is set to Yes, the DL widget immediately displays a QR Code for its label text.
• The QR Code:
  • Appears at minimal size initially.
  • Can be resized in the Editor (does not enforce squareness).
  • Updates automatically when the label text changes.
• These behaviors also apply when the property is modified dynamically at runtime.

Color Handling

• Background and foreground colors can be assigned to the QR Code DL.
• Editor behavior caveats:
  • Color changes persist across other DLs with QR Codes.
  • Once a QR Code image is generated for specific label text, it retains its original colors and cannot be reused with different colors.

Application Code Access

• The label text remains accessible via JPL or C code.
• The QR Code's internal bit array is not exposed to application code.
• No C library function is provided for direct QR data access.

Use Cases

• Installing secrets into smartphone Authenticator apps.
• Displaying product codes or URLs for mobile scanning.
• Assigning a double-click action to open a URL in a browser.
• Using the QR Code DL as a drop target via PR_DROP_TARGET.