[OS X TeX] magnifier lens bug in TeXShop's preview window

Chris Goedde cgg.lists at gmail.com
Thu Aug 30 07:49:01 EDT 2012

On Aug 30, 2012, at 3:29 AM, RA Friedrich Vosberg <fv at rafv.de> wrote:

>> I don't think this is a problem with TeXShop, it's just that taps are different than clicks.
> Hmm. But why in all other applications does tapping exactly the same like clicking, but only not in TeXShop?

But taps aren't identical to clicks in all other applications. Assuming "Tap to click" is selected in the Trackpad preferences, then tap-release is the same as click-release (or at least I think it is), but tap-hold is definitely not the same as click-hold. For example, in TextEdit, click-hold-drag selects text, but tap-hold-drag does nothing by default.

The "Enable Dragging" preference changes this; it seems to make double-tap-hold equivalent to click-hold. So with that setting set I can double-tap-hold-drag in TextEdit to select text.

Since the magnifier lens in TeXShop relies on click-hold (assuming we're talking about the same thing), it doesn't surprise me that tap-hold doesn't work by default. But if I enable the "Enable Dragging" setting, then double-tap-hold works correctly in TeXShop.

>> If you go into System Preferences, Accessibility, Mouse & Trackpad, Trackpad Options…, and select "Enable Dragging", then a double-tap will provide magnification in the TeXShop preview.
> Here it's not working on OSX 10.8.1 and TS 3.11. Although I've activated the mentioned feature, the magnified frame disappears immediately after the double or triple or quadruple tap.

It works for me, same setup. Are you doing a double-tap-hold? It can be a little finicky if you bounce on the second tap.


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