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STR #2882

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STR #2882

Application:FLTK Library
Status:5 - New
Priority:1 - Request for Enhancement, e.g. asking for a feature
Scope:3 - Applies to all machines and operating systems
Subsystem:Core Library
Summary:a minimum knob-size for Fl_Scrollbar widget
Created By:ajapted
Assigned To:Unassigned
Fix Version:Unassigned
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Name/Time/Date Text  
#1 ajapted
22:19 Nov 07, 2012
The size of the knob on the scrollbar is inversely proportional
to the total size of the contents to scroll through.  This is a
problem for long lists, as the knob becomes uncomfortably small
to use (Fitts' law and all that).

An ability to set a minimum size would be good.

Note that there is code in Fl_Scrollbar.cxx (and maybe other
places) which assumes slider_size has the value set by
Fl_Slider::scrollvalue(), and that code won't work properly
when the slider_size has a different value.  An example is
the handling of Page_Up and Page_Down keys, and clicking in
the blank space above or below the knob.

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