ScrollBarLogic

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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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