Katarina Behrens dbfd226e85 Imageviewer: zoom in and out using fixed set of common-sense zoom values ...

Previously scale factor for zoom in/out was calculated as

$(currentScaleFactor)^1.2

This results in weird zoom levels such as 83.3% or 144%. Replace this
approach with using pre-defined set of 'normal' zoom level values
such as {25%, 50%, .. 100%, 150%, 200% .. }, similar to what most
graphic editors do

To find the nearest greater or lesser fixed zoom level for any given
floating point scale factor I borrowed some code from qmldesigner/
timelinewidget

I didn't know what to do with zooming using mouse wheel so I left the
old code in place

Change-Id: Id037ef99f89cce5e8dcd58bb9ad0e6f3c8536f36
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>

2022-02-01 17:11:30 +00:00

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