Martino Ferrari
daff60e3f0
Review fix pass 1 on the task 7 work; four findings, all closed. 1. The Qt demo's region sat across the middle of the window, which is exactly where its own scripted input check pans: after the check's box zoom the press opened DragMode::MoveRegion, the x range never moved, and the check printed 'input check pan FAIL' -- under an exit 0, because the verdict was printed and not returned. The region now rides the left sixth (as the GLFW demo's does), both checks pass, and the verdict is wired to the exit status. The same audit found two more printed-only verdicts -- the GTK demo's scripted-resize layout check and its screenshot write (and Qt's) -- now wired too. What stays printed-only is the screenshot line of the GLFW host and the ImGui widget, where the dump happens inside the adapter's frame loop. 2. A follow-ing link group was invisible to the input layer: a member's own axis must be XFollow::Off (link_x() refuses a Live member), so Controller's x_zoom_anchor() extrapolated a coordinate from the pointer instead of using the live edge and a wheel over a row's axis strip walked the window back by 19% of its width (behind 0.000000 -> 0.285809 s). The group now publishes its own edge to every member (Axis::live_owner + Plot::set_x_live_owner, written by Figure::push_link, cleared when the group stops following or the row unlinks), and x_zoom_anchor() reads it. Public-header addition, called out. Measured after: behind 0.012992 s and the window's right edge bit-identical to the edge the group published at the gesture. 3. The multiplot summary printed x_link_count() -- a number of groups -- under 'rows in it'. It now reports the members and the group count separately, and every row line carries its own group id. 4. Host::controller_at() promised to clamp a pixel in a row gap to the nearest row and only clamped below the last one, so a gap pixel went to row 0. It now selects by distance, and tests/test_glfw_host.cpp pins it with a 40 px gap -- the first coverage of the host's figure routing, which needs no window. New cases: tests/test_controller.cpp x2 (the anchor and the hint's lifecycle), tests/test_glfw_host.cpp x3 (routing, the gap, the single-plot fallback): 229 cases, 0 failed, ASan clean. All five demos exit 0, the three self-checking modes exit 0, and the amended assertions were confirmed failing against the pre-fix behaviour.