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Slider value handles -ve values by clipping to zero

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see http://nanapro.org/en-us/forum/index.php?u=/topic/1092/ggslider-value-range
This commit is contained in:
James Bremner 2019-01-16 16:43:05 -05:00
parent 02d082959f
commit 26c28ae4be
2 changed files with 21 additions and 11 deletions
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8
include/nana/gui/widgets/slider.hpp
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@ -151,7 +151,13 @@ namespace nana
bool vertical() const; bool vertical() const;
void maximum(unsigned); void maximum(unsigned);
unsigned maximum() const; unsigned maximum() const;
void value(unsigned);
/** Set slider value
@param[in] v new value for slider.
v will be clipped to the range 0 to maximum
*/
void value(int );
unsigned value() const; unsigned value() const;
unsigned move_step(bool forward); ///< Increase or decrease the value of slider. unsigned move_step(bool forward); ///< Increase or decrease the value of slider.
unsigned adorn() const; unsigned adorn() const;

6
source/gui/widgets/slider.cpp
View File

@ -844,10 +844,14 @@ namespace nana
return get_drawer_trigger().get_model()->attribute().vmax; return get_drawer_trigger().get_model()->attribute().vmax;
} }
void slider::value(unsigned v) void slider::value(int v)
{ {
if(handle()) if(handle())
{ {
// limit to positive values, vcur expects unsigned
if( v < 0 )
v = 0;
if(get_drawer_trigger().get_model()->vcur(v)) if(get_drawer_trigger().get_model()->vcur(v))
API::refresh_window(handle()); API::refresh_window(handle());
} }