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//
// Fl_Flex demo program for the Fast Light Tool Kit (FLTK).
//
// Copyright 2020 by Karsten Pedersen
// Copyright 2022 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_Double_Window.H>
#include <FL/Fl_Flex.H>
#include <FL/Fl_Box.H>
#include <FL/Fl_Button.H>
#include <FL/Fl_Input.H>
#define DEBUG_GROUP (0)
void debug_group(Fl_Group *g) {
#if (DEBUG_GROUP)
printf("\nFl_Group (%p) has %d children:\n", g, g->children());
for (int i = 0; i < g->children(); i++) {
Fl_Widget *c = g->child(i);
printf(" child %2d: hidden = %-5s, (x,y,w,h) = (%3d, %3d, %3d, %3d), label = '%s'\n",
i, c->visible() ? "false" : "true", c->x(), c->y(), c->w(), c->h(),
c->label() ? c->label() : "(null)");
}
#endif
} // debug_group
Fl_Button *create_button(const char *caption) {
Fl_Button *rtn = new Fl_Button(0, 0, 120, 30, caption);
rtn->color(fl_rgb_color(225, 225, 225));
return rtn;
}
void toggle_cb(Fl_Widget *w, void *v) {
static Fl_Box *b = 0;
Fl_Widget *o = (Fl_Widget *)v;
Fl_Flex *flex = (Fl_Flex *)o->parent();
if (o->visible()) {
o->hide();
w->label("show OK button");
flex->child(1)->hide(); // hide Box
} else {
o->show();
w->label("hide OK button");
flex->child(1)->show(); // show Box
}
flex->layout();
debug_group(flex);
// Yet another test: modify the first (top) Fl_Flex widget
flex = (Fl_Flex *)(flex->parent()->child(0));
Fl_Group::current(0);
if (!b) {
b = new Fl_Box(0, 0, 0, 0, "Box3");
flex->insert(*b, flex->children() - 1);
} else {
delete b;
b = 0;
}
flex->layout();
debug_group(flex);
}
Fl_Flex *create_row() {
Fl_Flex *row = new Fl_Flex(Fl_Flex::ROW);
{
Fl_Button *toggle = create_button("hide OK button");
toggle->tooltip("hide() or show() OK button");
Fl_Box *box2 = new Fl_Box(0, 0, 120, 10, "Box2");
Fl_Button * okay = create_button("OK");
new Fl_Input(0, 0, 120, 10, "");
toggle->callback(toggle_cb, okay);
Fl_Flex *col2 = new Fl_Flex(Fl_Flex::COLUMN);
{
create_button("Top2");
create_button("Bottom2");
col2->end();
col2->margin(0, 5);
col2->box(FL_FLAT_BOX);
col2->color(fl_rgb_color(255, 128, 128));
}
row->fixed(box2, 50);
row->fixed(col2, 100);
row->end();
// TEST
row->box(FL_DOWN_BOX);
row->color(FL_GREEN);
}
return row;
}
int main(int argc, char **argv) {
Fl_Window *window = new Fl_Double_Window(100, 100, "Simple GUI Example");
Fl_Flex *col = new Fl_Flex(5, 5, 90, 90, Fl_Flex::COLUMN);
Fl_Flex *row1 = new Fl_Flex(Fl_Flex::ROW);
row1->color(FL_YELLOW);
row1->box(FL_FLAT_BOX);
create_button("Cancel");
new Fl_Box(0, 0, 120, 10, "Box1");
create_button("OK");
new Fl_Input(0, 0, 120, 10, "");
Fl_Flex *col1 = new Fl_Flex(Fl_Flex::COLUMN);
create_button("Top1");
create_button("Bottom1");
col1->box(FL_FLAT_BOX);
col1->color(fl_rgb_color(255, 128, 128));
col1->margin(5, 5);
col1->end();
row1->end();
col->fixed(create_row(), 90); // sets height of created (anonymous) row #2
create_button("Something1"); // "row" #3
Fl_Flex *row4 = new Fl_Flex(Fl_Flex::ROW);
Fl_Button *cancel = create_button("Cancel");
Fl_Button *ok = create_button("OK");
new Fl_Input(0, 0, 120, 10, "");
row4->fixed(cancel, 100);
row4->fixed(ok, 100);
row4->end();
create_button("Something2"); // "row" #5
col->fixed(row4, 30);
col->margin(6, 10, 6, 10);
col->gap(6);
col->end();
window->resizable(col);
window->color(fl_rgb_color(160, 180, 240));
window->box(FL_FLAT_BOX);
window->end();
window->size_range(550, 330);
window->resize(0, 0, 640, 480);
window->show(argc, argv);
int ret = Fl::run();
delete window; // not necessary but useful to test for memory leaks
return ret;
}
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