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//
// Fl_Group manipulation test program for the Fast Light Tool Kit (FLTK).
//
// Copyright 2024 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
//
// This test program creates two groups and moves widgets around
// between groups to test insert, append, remove, etc..
#include <FL/Fl_Double_Window.H>
#include <FL/Fl_Box.H>
#include <FL/Fl_Button.H>
#include <FL/Fl_Flex.H>
#include <FL/Fl_Terminal.H>
// #include <vector>
// Globals for easier testing
const int ww = 520; // window width
const int wh = 200; // window height (w/o button and terminal)
const int th = 200; // initial terminal (tty) height
Fl_Double_Window *window;
Fl_Flex *g1, *g2;
Fl_Box *b1, *b2, *b3, *b4;
Fl_Terminal *tty;
void debug_group(Fl_Group *g) {
const int nc = g->children();
tty->printf("%s has %2d child%s\n", g->label(), nc, nc == 1 ? "" : "ren");
for (int i = 0; i < g->children(); i++) {
Fl_Widget *w = g->child(i);
const char *lbl = w ? w->label() : "";
#if (0) // full info with child address
tty->printf(" Child[%2d] (%p) = %s\n", i, (void *)w, lbl);
#else // short info
tty->printf(" Child[%2d] = %s\n", i, lbl);
#endif
}
}
// This button callback exercises multiple Fl_Group operations in a circle.
// Note to devs: make sure that the last action restores the original layout.
void button_cb(Fl_Widget *, void *) {
static int move = 0;
move++;
tty->printf("\nMove %2d:\n", move);
switch(move) {
case 1: g1->insert(*b3, 0); break;
case 2: g1->insert(*b3, 2); break;
case 3: g1->insert(*b2, 1); break;
case 4: g1->insert(*b1, 5); break;
case 5: g1->insert(*b1, 1); break;
case 6: g1->insert(*b4, 3); break;
case 7: g1->insert(*b3, 2); break; // no-op (same position)
case 8: g2->add(b3); break;
case 9: g2->add(b3); break; // no-op (same position)
case 10: g2->add(b4); break;
case 11: g1->remove(b2); break;
case 12: g1->add(b2); move = 0; break; // last move: reset counter
default: move = 0; break; // safety: reset counter
}
debug_group(g1);
debug_group(g2);
g1->layout();
g2->layout();
window->redraw();
}
int main(int argc, char **argv) {
window = new Fl_Double_Window(ww, wh + th + 100, "Fl_Group Test");
g1 = new Fl_Flex(50, 20, ww - 80, wh / 2 - 20, "g1: ");
g1->type(Fl_Flex::HORIZONTAL);
g1->box(FL_FLAT_BOX);
g1->color(FL_WHITE);
g1->align(FL_ALIGN_LEFT);
b1 = new Fl_Box(0, 0, 0, 0, "b1");
b1->box(FL_FLAT_BOX);
b1->color(FL_RED);
b2 = new Fl_Box(0, 0, 0, 0, "b2");
b2->box(FL_FLAT_BOX);
b2->color(FL_GREEN);
g1->end();
g2 = new Fl_Flex(50, wh / 2 + 20, ww - 80, wh / 2 - 20, "g2: ");
g2->type(Fl_Flex::HORIZONTAL);
g2->box(FL_FLAT_BOX);
g2->color(FL_WHITE);
g2->align(FL_ALIGN_LEFT);
b3 = new Fl_Box(0, 0, 0, 0, "b3");
b3->box(FL_FLAT_BOX);
b3->color(FL_BLUE);
b3->labelcolor(FL_WHITE);
b4 = new Fl_Box(0, 0, 0, 0, "b4");
b4->box(FL_FLAT_BOX);
b4->color(FL_YELLOW);
g2->end();
auto bt = new Fl_Button(10, wh + 20, ww - 20, 40, "Move children ...");
bt->callback(button_cb);
tty = new Fl_Terminal(10, wh + 80, ww - 20, th);
window->end();
window->resizable(tty);
window->size_range(window->w(), window->h());
window->show(argc, argv);
tty->printf("sizeof(Fl_Widget) = %3d\n", (int)sizeof(Fl_Widget));
tty->printf("sizeof(Fl_Box) = %3d\n", (int)sizeof(Fl_Box));
tty->printf("sizeof(Fl_Button) = %3d\n", (int)sizeof(Fl_Button));
tty->printf("sizeof(Fl_Group) = %3d\n", (int)sizeof(Fl_Group));
tty->printf("sizeof(Fl_Window) = %3d\n", (int)sizeof(Fl_Window));
int idx = g2->children() + 3;
tty->printf("child(n) out of range: g2->child(%d) = %p, children = %d\n",
idx, (void *)g2->child(idx), g2->children());
int ret = Fl::run();
// reset pointers to give memory checkers a chance to test for leaks
g1 = g2 = nullptr;
tty = nullptr;
b1 = b2 = b3 = b4 = nullptr;
bt = nullptr;
delete window;
return ret;
}
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