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//
// "GTK" drawing routines for the Fast Light Tool Kit (FLTK).
//
// These box types provide a GTK+ look, based on Red Hat's Bluecurve
// theme...
//
// Copyright 2006-2025 by Michael Sweet.
//
// 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>
static void gtk_color(Fl_Color c) {
Fl::set_box_color(c);
}
void fl_gtk_up_frame(int x, int y, int w, int h, Fl_Color c) {
gtk_color(fl_color_average(FL_WHITE, c, 0.5));
fl_xyline(x + 2, y + 1, x + w - 3);
fl_yxline(x + 1, y + 2, y + h - 3);
gtk_color(fl_color_average(FL_BLACK, c, 0.5));
fl_begin_loop();
fl_vertex(x, y + 2);
fl_vertex(x + 2, y);
fl_vertex(x + w - 3, y);
fl_vertex(x + w - 1, y + 2);
fl_vertex(x + w - 1, y + h - 3);
fl_vertex(x + w - 3, y + h - 1);
fl_vertex(x + 2, y + h - 1);
fl_vertex(x, y + h - 3);
fl_end_loop();
}
void fl_gtk_up_box(int x, int y, int w, int h, Fl_Color c) {
fl_gtk_up_frame(x, y, w, h, c);
gtk_color(fl_color_average(FL_WHITE, c, 0.4f));
fl_xyline(x + 2, y + 2, x + w - 3);
gtk_color(fl_color_average(FL_WHITE, c, 0.2f));
fl_xyline(x + 2, y + 3, x + w - 3);
gtk_color(fl_color_average(FL_WHITE, c, 0.1f));
fl_xyline(x + 2, y + 4, x + w - 3);
gtk_color(c);
fl_rectf(x + 2, y + 5, w - 4, h - 7);
gtk_color(fl_color_average(FL_BLACK, c, 0.025f));
fl_xyline(x + 2, y + h - 4, x + w - 3);
gtk_color(fl_color_average(FL_BLACK, c, 0.05f));
fl_xyline(x + 2, y + h - 3, x + w - 3);
gtk_color(fl_color_average(FL_BLACK, c, 0.1f));
fl_xyline(x + 2, y + h - 2, x + w - 3);
fl_yxline(x + w - 2, y + 2, y + h - 3);
}
void fl_gtk_down_frame(int x, int y, int w, int h, Fl_Color c) {
gtk_color(fl_color_average(FL_BLACK, c, 0.5));
fl_begin_loop();
fl_vertex(x, y + 2);
fl_vertex(x + 2, y);
fl_vertex(x + w - 3, y);
fl_vertex(x + w - 1, y + 2);
fl_vertex(x + w - 1, y + h - 3);
fl_vertex(x + w - 3, y + h - 1);
fl_vertex(x + 2, y + h - 1);
fl_vertex(x, y + h - 3);
fl_end_loop();
gtk_color(fl_color_average(FL_BLACK, c, 0.1f));
fl_xyline(x + 2, y + 1, x + w - 3);
fl_yxline(x + 1, y + 2, y + h - 3);
gtk_color(fl_color_average(FL_BLACK, c, 0.05f));
fl_yxline(x + 2, y + h - 2, y + 2, x + w - 2);
}
void fl_gtk_down_box(int x, int y, int w, int h, Fl_Color c) {
fl_gtk_down_frame(x, y, w, h, c);
gtk_color(c);
fl_rectf(x + 3, y + 3, w - 5, h - 4);
fl_yxline(x + w - 2, y + 3, y + h - 3);
}
void fl_gtk_thin_up_frame(int x, int y, int w, int h, Fl_Color c) {
gtk_color(fl_color_average(FL_WHITE, c, 0.6f));
fl_xyline(x + 1, y, x + w - 2);
fl_yxline(x, y + 1, y + h - 2);
gtk_color(fl_color_average(FL_BLACK, c, 0.4f));
fl_xyline(x + 1, y + h - 1, x + w - 2);
fl_yxline(x + w - 1, y + 1, y + h - 2);
}
void fl_gtk_thin_up_box(int x, int y, int w, int h, Fl_Color c) {
fl_gtk_thin_up_frame(x, y, w, h, c);
gtk_color(fl_color_average(FL_WHITE, c, 0.4f));
fl_xyline(x + 1, y + 1, x + w - 2);
gtk_color(fl_color_average(FL_WHITE, c, 0.2f));
fl_xyline(x + 1, y + 2, x + w - 2);
gtk_color(fl_color_average(FL_WHITE, c, 0.1f));
fl_xyline(x + 1, y + 3, x + w - 2);
gtk_color(c);
fl_rectf(x + 1, y + 4, w - 2, h - 8);
gtk_color(fl_color_average(FL_BLACK, c, 0.025f));
fl_xyline(x + 1, y + h - 4, x + w - 2);
gtk_color(fl_color_average(FL_BLACK, c, 0.05f));
fl_xyline(x + 1, y + h - 3, x + w - 2);
gtk_color(fl_color_average(FL_BLACK, c, 0.1f));
fl_xyline(x + 1, y + h - 2, x + w - 2);
}
void fl_gtk_thin_down_frame(int x, int y, int w, int h, Fl_Color c) {
gtk_color(fl_color_average(FL_BLACK, c, 0.4f));
fl_xyline(x + 1, y, x + w - 2);
fl_yxline(x, y + 1, y + h - 2);
gtk_color(fl_color_average(FL_WHITE, c, 0.6f));
fl_xyline(x + 1, y + h - 1, x + w - 2);
fl_yxline(x + w - 1, y + 1, y + h - 2);
}
void fl_gtk_thin_down_box(int x, int y, int w, int h, Fl_Color c) {
fl_gtk_thin_down_frame(x, y, w, h, c);
gtk_color(c);
fl_rectf(x + 1, y + 1, w - 2, h - 2);
}
//------------------------
// new GTK+ style for round buttons
#if 1
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)
{
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;
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) {
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
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));
else if (w > h)
fl_rectf(x+d/2, y, w-(d&-2), 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);
}
}
}
void fl_gtk_round_up_box(int x, int y, int w, int h, Fl_Color c) {
gtk_color(c);
draw(FILL, x, y, w, h, 2);
gtk_color(fl_color_average(FL_BLACK, c, 0.025f));
draw(LOWER_RIGHT, x+1, y, w-2, h, 2);
draw(LOWER_RIGHT, x, y, w, h, 3);
gtk_color(fl_color_average(FL_BLACK, c, 0.05f));
draw(LOWER_RIGHT, x+1, y, w-2, h, 1);
draw(LOWER_RIGHT, x, y, w, h, 2);
gtk_color(fl_color_average(FL_BLACK, c, 0.1f));
draw(LOWER_RIGHT, x+1, y, w-2, h, 0);
draw(LOWER_RIGHT, x, y, w, h, 1);
gtk_color(fl_color_average(FL_WHITE, c, 0.1f));
draw(UPPER_LEFT, x, y, w, h, 4);
draw(UPPER_LEFT, x+1, y, w-2, h, 3);
gtk_color(fl_color_average(FL_WHITE, c, 0.2f));
draw(UPPER_LEFT, x, y, w, h, 3);
draw(UPPER_LEFT, x+1, y, w-2, h, 2);
gtk_color(fl_color_average(FL_WHITE, c, 0.4f));
draw(UPPER_LEFT, x, y, w, h, 2);
draw(UPPER_LEFT, x+1, y, w-2, h, 1);
gtk_color(fl_color_average(FL_WHITE, c, 0.5f));
draw(UPPER_LEFT, x, y, w, h, 1);
draw(UPPER_LEFT, x+1, y, w-2, h, 0);
gtk_color(fl_color_average(FL_BLACK, c, 0.5f));
draw(CLOSED, x, y, w, h, 0);
}
void fl_gtk_round_down_box(int x, int y, int w, int h, Fl_Color c) {
gtk_color(c);
draw(FILL, x, y, w, h, 2);
gtk_color(fl_color_average(FL_WHITE, c, 0.1f));
draw(LOWER_RIGHT, x+1, y, w-2, h, 2);
draw(LOWER_RIGHT, x, y, w, h, 3);
gtk_color(fl_color_average(FL_WHITE, c, 0.2f));
draw(LOWER_RIGHT, x+1, y, w-2, h, 1);
draw(LOWER_RIGHT, x, y, w, h, 2);
gtk_color(fl_color_average(FL_WHITE, c, 0.5f));
draw(LOWER_RIGHT, x+1, y, w-2, h, 0);
draw(LOWER_RIGHT, x, y, w, h, 1);
gtk_color(fl_color_average(FL_BLACK, c, 0.05f));
draw(UPPER_LEFT, x, y, w, h, 2);
draw(UPPER_LEFT, x+1, y, w-2, h, 1);
gtk_color(fl_color_average(FL_BLACK, c, 0.1f));
draw(UPPER_LEFT, x, y, w, h, 1);
draw(UPPER_LEFT, x+1, y, w-2, h, 0);
gtk_color(fl_color_average(FL_BLACK, c, 0.5f));
draw(CLOSED, x, y, w, h, 0);
}
#else
void fl_gtk_round_up_box(int x, int y, int w, int h, Fl_Color c) {
gtk_color(c);
fl_pie(x, y, w, h, 0.0, 360.0);
gtk_color(fl_color_average(FL_WHITE, c, 0.5f));
fl_arc(x, y, w, h, 45.0, 180.0);
gtk_color(fl_color_average(FL_WHITE, c, 0.25f));
fl_arc(x, y, w, h, 180.0, 405.0);
gtk_color(fl_color_average(FL_BLACK, c, 0.5f));
fl_arc(x, y, w, h, 225.0, 360.0);
}
void fl_gtk_round_down_box(int x, int y, int w, int h, Fl_Color c) {
gtk_color(c);
fl_pie(x, y, w, h, 0.0, 360.0);
gtk_color(fl_color_average(FL_BLACK, c, 0.2));
fl_arc(x + 1, y, w, h, 90.0, 210.0);
gtk_color(fl_color_average(FL_BLACK, c, 0.6));
fl_arc(x, y, w, h, 0.0, 360.0);
}
#endif
extern void fl_round_focus(Fl_Boxtype bt, int x, int y, int w, int h, Fl_Color fg, Fl_Color bg);
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