PR# 19738 EV_GRID.vertical_scroll_bar.step_forward / backward -- buggy behaviour

Problem Report Summary

Submitter: HowardThomsonSurrey

Category: EiffelVision

Priority: Low

Date: 2021/04/05

Class: Bug

Severity: Non-critical

Number: 19738

Release: 19.12

Confidential: No

Status: Open

Responsible:

Environment: linux

Synopsis: EV_GRID.vertical_scroll_bar.step_forward / backward -- buggy behaviour

Description

I have an agent attached to pointer_button_press_actions which calls vertical_scroll_bar.step_forward [step_backward] in the context of a descendant of EV_GRID.

When the scroll_bar is visible, mouse_wheel actions in the display area behave correctly, consistent with the content being visible with no top/bottom gaps.

When the scroll_bar is not visible, mouse_wheel events scroll the contents off the top of the screen ...

To Reproduce

I may submit a reduced code sample to reproduce this at a later date ...

Problem Report Interactions