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//
// Rounded box drawing routines for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2025 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file. If this
// file is missing or damaged, see the license at:
//
// https://www.fltk.org/COPYING.php
//
// Please see the following page on how to report bugs and issues:
//
// https://www.fltk.org/bugs.php
//
#include <FL/Fl.H>
#include <FL/fl_draw.H>
// Global parameters for rounded corner drawing algorithm:
//
// RN = number of segments per corner (must match offset array size)
// RS = max. corner radius
// BW = box shadow width
#define RS (Fl::box_border_radius_max())
#define BW (Fl::box_shadow_width())
static void rbox(int fill, int x, int y, int w, int h) {
int rs, rsy;
rs = w*2/5; rsy = h*2/5;
if (rs > rsy) rs = rsy; // use smaller radius
if (rs > RS) rs = RS;
if (fill)
fl_rounded_rectf(x, y, w, h, rs);
else
fl_rounded_rect(x, y, w, h, rs);
}
void fl_rflat_box(int x, int y, int w, int h, Fl_Color c) {
Fl::set_box_color(c);
rbox(1, x, y, w, h); rbox(0, x, y, w, h);
}
void fl_rounded_frame(int x, int y, int w, int h, Fl_Color c) {
Fl::set_box_color(c);
rbox(0, x, y, w, h);
}
void fl_rounded_box(int x, int y, int w, int h, Fl_Color c) {
Fl::set_box_color(c);
rbox(1, x, y, w, h);
fl_color(FL_BLACK); rbox(0, x, y, w, h);
}
void fl_rshadow_box(int x, int y, int w, int h, Fl_Color c) {
// draw shadow:
fl_color(FL_DARK3);
rbox(1, x+BW, y+BW, w, h);
rbox(0, x+BW, y+BW, w, h);
// draw the box:
fl_rounded_box(x, y, w, h, c);
}
void fl_rounded_focus(Fl_Boxtype bt, int x, int y, int w, int h, Fl_Color fg, Fl_Color bg) {
x += Fl::box_dx(bt);
y += Fl::box_dy(bt);
w -= Fl::box_dw(bt)+1;
h -= Fl::box_dh(bt)+1;
Fl_Color savecolor = fl_color();
fl_color(fl_contrast(fg, bg));
fl_line_style(FL_DOT);
rbox(0, x+1, y+1, w-1, h-1);
fl_line_style(FL_SOLID);
fl_color(savecolor);
}
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