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As part of the GUI rewrite effort, the scrollbar logic needs to be reconsidered. This page documents the aspects of the development and testing of scrollbar logic. There are currently 4 different algorithms to compare: Pd, Pd-extended, Pd-GUI-Rewrite, and Ico's (in order of age).

Tests

prevents patch scrolling when no scrollbars

  • Pd: yes

  • Pd-extended: no, has odd movement when no scrollbars and using mouse wheel

  • Pd-GUI-Rewrite: yes

  • Ico: no, has odd movement when no scrollbars and using mouse wheel

select objects and move with Shift-Arrowkey

  • Pd: does not show scrollbars when needed

  • Pd-extended: shows/hides scrollbars correctly

  • Pd-GUI-Rewrite: does not show scrollbars when needed

  • Ico: does not show scrollbars when needed, unless you scroll with the keyboard for over a second or so, then the scrollbars show up.

select all and mouse drag components

  • Pd: updates once mouse is released

  • Pd-extended: updates scrollbars immediately and live

  • Pd-GUI-Rewrite: updates once mouse is released

  • Ico: prevents patch contents from leaving the frame of the window, except comments

resize window

  • Pd: updates scrollbars on mouse release

  • Pd-extended: updates scrollbars live but has glitches

  • Pd-GUI-Rewrite: updates scrollbars live

  • Ico:

place object onto blank canvas, then select and drag off-canvas to the left

  • Pd: creates scrollbar on release, but its in the wrong position

  • Pd-extended: updates scrollbar live

  • Pd-GUI-Rewrite: on mouse release, recenters view so there are no scrollbars (when x value is negative)

  • Ico: updates scrollbar live, except for comments

place object onto blank canvas, then select and drag off-canvas to the right

  • Pd: creates scrollbar on release, but its in the wrong position

  • Pd-extended: updates scrollbar live

  • Pd-GUI-Rewrite: updates scrollbar on mouse release

  • Ico:

place object onto blank canvas, then select and drag off-canvas to the top

  • Pd: creates scrollbar on release, but its in the wrong position

  • Pd-extended: updates scrollbar live

  • Pd-GUI-Rewrite: on mouse release, recenters view so there are no scrollbars (when y value is negative)

  • Ico:

place object onto blank canvas, then select and drag off-canvas to the bottom

  • Pd: creates scrollbar on release, but its in the wrong position

  • Pd-extended: updates scrollbar live

  • Pd-GUI-Rewrite: updates scrollbar on mouse release

  • Ico:




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