<HTML><BODY> <HR break> <H2><A name=Fl_Scrollbar>class Fl_Scrollbar</A></H2> <HR> <H3>Class Hierarchy</H3> <UL> <PRE> <A href=Fl_Slider.html#Fl_Slider>Fl_Slider</A> | +----<B>Fl_Scrollbar</B> </PRE> </UL> <H3>Include Files</H3> <UL> <PRE> #include <FL/Fl_Scrollbar.H> </PRE> </UL> <H3>Description</H3> The <TT>Fl_Scrollbar</TT> widget displays a slider with arrow buttons at the ends of the scrollbar. Clicking on the arrows move up/left and down/right by <TT>linesize()</TT>. Scrollbars also accept <TT> FL_SHORTCUT</TT> events: the arrows move by <TT>linesize()</TT>, and vertical scrollbars take Page Up/Down (they move by the page size minus <TT> linesize()</TT>) and Home/End (they jump to the top or bottom). <P>Scrollbars have <TT>step(1)</TT> preset (they always return integers). If desired you can set the <TT>step()</TT> to non-integer values. You will then have to use casts to get at the floating-point versions of <TT>value()</TT> from <TT>Fl_Slider</TT>. </P> <H3>Methods</H3> <UL> <LI><A href=#Fl_Scrollbar.Fl_Scrollbar>Fl_Scrollbar</A></LI> <LI><A href=#Fl_Scrollbar.~Fl_Scrollbar>~Fl_Scrollbar</A></LI> <LI><A href=#Fl_Scrollbar.linesize>linesize</A></LI> <LI><A href=#Fl_Scrollbar.value>value</A></LI> </UL> <H4><A name=Fl_Scrollbar.Fl_Scrollbar>Fl_Scrollbar::Fl_Scrollbar(int x, int y, int w, int h, const char *label = 0)</A></H4> Creates a new <TT>Fl_Scrollbar</TT> widget using the given position, size, and label string. You need to do <TT>type(FL_HORIZONTAL)</TT> if you want a horizontal scrollbar. <H4><A name=Fl_Scrollbar.~Fl_Scrollbar>virtual Fl_Scrollbar::~Fl_Scrollbar()</A></H4> Destroys the valuator. <H4><A name=Fl_Scrollbar.linesize>int Fl_Scrollbar::linesize() const <BR> void Fl_Scrollbar::linesize(int i)</A></H4> This number controls how big the steps are that the arrow keys do. In addition page up/down move by the size last sent to <TT>value()</TT> minus one <TT>linesize()</TT>. The default is 16. <H4><A name=Fl_Scrollbar.value>int Fl_Scrollbar::value() <BR> int Fl_Scrollbar::value(int position, int size, int top, int total)</A> </H4> The first form returns the integer value of the scrollbar. You can get the floating point value with <TT>Fl_Slider::value()</TT>. The second form sets <TT>value()</TT>, <TT>range()</TT>, and <TT>slider_size()</TT> to make a variable-sized scrollbar. You should call this every time your window changes size, your data changes size, or your scroll position changes (even if in response to a callback from this scrollbar). All necessary calls to <TT>redraw()</TT> are done. </BODY></HTML>