When using the renderers in PACS interaction mode using keyboard modifiers (e.g. control + button to zoom), the renderer may become unresponsive when the modifier key is released too early.
To reproduce:
- Load an image file;
- Press and hold the control key;
- Press and drag the right mouse button over a renderer window (do not release yet);
- Release the control key;
- Release the right mouse button.
The renderers now do not initiate any mouse interaction when clicking/dragging.
To 'unfreeze':
- Press and hold the control key;
- Press and hold the right mouse button over a renderer window;
- Release the right mouse button;
- Release the control key.
All interactivity is now as it should be.
Reproduced on Windows (release 2021 and 2018) and macOS.