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//
// Round 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
//
// Box drawing code for an obscure box type.
// These box types are in separate files so they are not linked
// in if not used.
#include <FL/Fl.H>
#include <FL/fl_draw.H>
// A compiler from a certain very large software company will not compile
// the function pointer assignment due to the name conflict with fl_arc.
// This function is to fix that:
static void fl_arc_i(int x,int y,int w,int h,double a1,double a2) {
fl_arc(x,y,w,h,a1,a2);
}
enum {UPPER_LEFT, LOWER_RIGHT, CLOSED, FILL};
static void draw(int which, int x,int y,int w,int h, int inset, Fl_Color color)
{
if (inset*2 >= w) inset = (w-1)/2;
if (inset*2 >= h) inset = (h-1)/2;
x += inset;
y += inset;
w -= 2*inset;
h -= 2*inset;
int d = w <= h ? w : h;
if (d <= 1) return;
fl_color(color);
void (*f)(int,int,int,int,double,double);
f = (which==FILL) ? fl_pie : fl_arc_i;
if (which >= CLOSED) {
if (w == h) f(x, y, d, d, 0, 360);
else {
f(x+w-d, y, d, d, w<=h ? 0 : -90, w<=h ? 180 : 90);
f(x, y+h-d, d, d, w<=h ? 180 : 90, w<=h ? 360 : 270);
}
} else if (which == UPPER_LEFT) {
if (w == h) f(x, y, d, d, 45, 225);
else {
f(x+w-d, y, d, d, 45, w<=h ? 180 : 90);
f(x, y+h-d, d, d, w<=h ? 180 : 90, 225);
}
} else { // LOWER_RIGHT
if (w == h) f(x, y, d, d, 225, 405);
else {
f(x, y+h-d, d, d, 225, w<=h ? 360 : 270);
f(x+w-d, y, d, d, w<=h ? 360 : 270, 360+45);
}
}
if (which == FILL) {
if (w < h)
fl_rectf(x, y+d/2, w, h-(d&-2)+1);
else if (w > h)
fl_rectf(x+d/2, y, w-(d&-2)+1, h);
} else {
if (w < h) {
if (which != UPPER_LEFT) fl_yxline(x+w-1, y+d/2-1, y+h-d/2+1);
if (which != LOWER_RIGHT) fl_yxline(x, y+d/2-1, y+h-d/2+1);
} else if (w > h) {
if (which != UPPER_LEFT) fl_xyline(x+d/2-1, y+h-1, x+w-d/2+1);
if (which != LOWER_RIGHT) fl_xyline(x+d/2-1, y, x+w-d/2+1);
}
}
}
extern const uchar* fl_gray_ramp();
void fl_round_down_box(int x, int y, int w, int h, Fl_Color bgcolor) {
const uchar *g = fl_gray_ramp();
draw(FILL, x, y, w, h, 2, Fl::box_color(bgcolor));
draw(UPPER_LEFT, x+1, y, w-2, h, 0, (Fl_Color)g[(int)'N']);
draw(UPPER_LEFT, x+1, y, w-2, h, 1, (Fl_Color)g[(int)'H']);
draw(UPPER_LEFT, x, y, w, h, 0, (Fl_Color)g[(int)'N']);
draw(UPPER_LEFT, x, y, w, h, 1, (Fl_Color)g[(int)'H']);
draw(LOWER_RIGHT, x, y, w, h, 0, (Fl_Color)g[(int)'S']);
draw(LOWER_RIGHT, x+1, y, w-2, h, 0, (Fl_Color)g[(int)'U']);
draw(LOWER_RIGHT, x, y, w, h, 1, (Fl_Color)g[(int)'U']);
draw(LOWER_RIGHT, x+1, y, w-2, h, 1, (Fl_Color)g[(int)'W']);
draw(CLOSED, x, y, w, h, 2, (Fl_Color)g[(int)'A']);
}
void fl_round_up_box(int x, int y, int w, int h, Fl_Color bgcolor) {
const uchar *g = fl_gray_ramp();
draw(FILL, x, y, w, h, 2, Fl::box_color(bgcolor));
draw(LOWER_RIGHT, x+1, y, w-2, h, 0, (Fl_Color)g[(int)'H']);
draw(LOWER_RIGHT, x+1, y, w-2, h, 1, (Fl_Color)g[(int)'N']);
draw(LOWER_RIGHT, x, y, w, h, 1, (Fl_Color)g[(int)'H']);
draw(LOWER_RIGHT, x, y, w, h, 2, (Fl_Color)g[(int)'N']);
draw(UPPER_LEFT, x, y, w, h, 2, (Fl_Color)g[(int)'U']);
draw(UPPER_LEFT, x+1, y, w-2, h, 1, (Fl_Color)g[(int)'S']);
draw(UPPER_LEFT, x, y, w, h, 1, (Fl_Color)g[(int)'W']);
draw(UPPER_LEFT, x+1, y, w-2, h, 0, (Fl_Color)g[(int)'U']);
draw(CLOSED, x, y, w, h, 0, (Fl_Color)g[(int)'A']);
}
void fl_round_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);
h -= Fl::box_dh(bt);
Fl_Color savecolor = fl_color();
fl_line_style(FL_DOT);
draw(CLOSED, x, y, w, h, 0, fl_contrast(fg, bg));
fl_line_style(FL_SOLID);
fl_color(savecolor);
}
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