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author committer Harald Nordgren 2016-03-28 23:07:46 +0200 Shawn Rutledge 2018-03-22 21:37:45 +0000 97e40a5409dd4338084fe8df2397156dccc49d6d (patch) 4356837b5cc6cb2e1e8ed858d745743424380500 a692d7cd2804ead51aef8670c9fbb098c117ebf6 (diff)
Allow adaptive decimal stepping for QSpinBox and QDoubleSpinBox
Adds the feature of adaptive decimal step sizes for the QSpinBox and QDoubleSpinBox. By performing a calculation in QAbstractSpinBox::stepBy() we continuously set the step size one power of ten below the current value. So when the value is 1100, the step is set to 100, so stepping up once increases it to 1200. For 1200 stepping up takes it to 1300. For negative values stepping down from -1100 goes to -1200. It also works for all decimal values. 0.041 is increased to 0.042 by stepping once, and so on. The step direction is taken into account to handle edges cases, so that stepping down from 100 takes the value to 99 instead of 90. Thus, a step up followed by a step down -- or vice versa -- lands on the starting value; 99 -> 100 -> 99. Setting this property effectively disregards singleStep, but preserves its value so that it takes effect again when adaptive decimal step is disabled. Adaptive decimal step allows values to be easily set to reasonable levels. If the spin box value is 12000, changing to 13000 often makes more sense than to 12001. The feature is turned off be default, when single stepping is desired. The accelerated property allows values to be changed quickly, as well, but it is imprecise. Holding down the button makes it hard to land on an even thousand, like 12000 or 13000. Often you end up somewhere nearby and would need a second adjustment to get to an even hundred or thousand. [ChangeLog][QtWidgets] Add option of adaptive decimal step size for QSpinBox and QDoubleSpinBox. Change-Id: I9f286479b821e240c8ea05c238932fc128c582bb Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
-rw-r--r--src/widgets/widgets/qabstractspinbox.cpp15
-rw-r--r--src/widgets/widgets/qabstractspinbox.h5
-rw-r--r--src/widgets/widgets/qabstractspinbox_p.h3
-rw-r--r--src/widgets/widgets/qspinbox.cpp116
-rw-r--r--src/widgets/widgets/qspinbox.h8
-rw-r--r--tests/auto/widgets/widgets/qdoublespinbox/tst_qdoublespinbox.cpp131
-rw-r--r--tests/auto/widgets/widgets/qspinbox/tst_qspinbox.cpp81
7 files changed, 358 insertions, 1 deletions