class Fl_Slider

Class Hierarchy

Include Files


The Fl_Slider widget contains a sliding knob inside a box. It if often used as a scrollbar. Moving the box all the way to the top/left sets it to the minimum(), and to the bottom/right to the maximum(). The minimum() may be greater than the maximum() to reverse the slider direction.


Fl_Slider::Fl_Slider(int x, int y, int w, int h, const char *label = 0)

Creates a new Fl_Slider widget using the given position, size, and label string. The default boxtype is FL_DOWN_BOX.

virtual Fl_Slider::~Fl_Slider()

Destroys the valuator.

int Fl_Slider::scrollvalue(int windowtop, int windowsize, int first, int totalsize)

Returns Fl_Scrollbar::value().

Fl_Boxtype Fl_Slider::slider() const
void Fl_Slider::slider(Fl_Boxtype)

Set the type of box to draw for the moving part of the slider. The color of the moving part (or of the notch in it for the nice sliders) is controlled by selection_color(). The default value of zero causes the slider to figure out what to draw from box().

float Fl_Slider::slider_size() const
void Fl_Slider::slider_size(float)

Get or set the dimensions of the moving piece of slider. This is the fraction of the size of the entire widget. If you set this to 1 then the slider cannot move. The default value is .08.

For the "fill" sliders this is the size of the area around the end that causes a drag effect rather than causing the slider to jump to the mouse.

uchar Fl_Widget::type() const
void Fl_Widget::type(uchar t)

Setting this changes how the slider is drawn, which can be one of the following: