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//
// Fl_Grid demo program for the Fast Light Tool Kit (FLTK).
//
// Copyright 2021 by Albrecht Schlosser
// Copyright 2022-2024 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 program tests several different alignment features of Fl_Grid.
//
#include <FL/Fl.H>
#include <FL/Fl_Double_Window.H>
#include <FL/Fl_Grid.H>
#include <FL/Fl_Button.H>
#include <FL/Fl_Input.H>
#include <FL/Fl_Box.H>
// Test function to change the layout (executed by timer callback)
#define TEST_RELAYOUT (0)
#define TEST_REMOVE_NOTIFY (0)
#if (TEST_RELAYOUT)
void relayout_cb(void *v) {
Fl_Grid *grid = (Fl_Grid *)v;
grid->layout(5, 5, 8, 4);
grid->margin(10, 20, 30, 40);
grid->layout();
grid->redraw();
}
#endif
#if TEST_REMOVE_NOTIFY
void remove_cb(void *v) {
static int n = 10;
n--;
Fl_Grid *grid = (Fl_Grid *)v;
#if (0) // test 1: remove() the widget -- leaks memory (!)
grid->remove(n);
#else // test 2: delete the widget -- no leak
delete grid->child(0);
#endif
if (n > 0)
Fl::repeat_timeout(0.3, remove_cb, v);
}
#endif
int main(int argc, char **argv) {
Fl_Grid::Cell *c;
Fl_Box *b;
Fl_Double_Window *win = new Fl_Double_Window(440, 350, "Fl_Grid Alignment Test");
Fl_Grid *grid = new Fl_Grid(10, 10, 420, 330);
grid->layout(7, 7, 8, 4); // cols, rows, margin, gap
grid->box(FL_FLAT_BOX);
grid->color(FL_WHITE);
// add boxes (top and bottom rows)
for (int col = 0; col < 7; col++) {
grid->col_width(col, 50);
b = new Fl_Box(0, 0, 20, 20); // variable size
if (col == 5) {
b->size(4, 20); // reduce width
grid->col_width(col, 4); // new min. width
grid->col_weight(col, 0); // no hor. resizing
}
b->box(FL_FLAT_BOX);
b->color(FL_BLUE);
grid->widget(b, 0, col);
if (col == 5)
b = new Fl_Box(0, 0, 4, 20); // variable size
else
b = new Fl_Box(0, 0, 20, 20); // variable size
b->box(FL_FLAT_BOX);
b->color(FL_RED);
grid->widget(b, 6, col);
}
// add boxes (left and right columns)
grid->row_height(0, 40);
grid->row_height(6, 40);
for (int row = 1; row < 6; row++) {
grid->row_height(row, 40);
b = new Fl_Box(0, 0, 20, 20); // fixed size, see alignment below
b->box(FL_FLAT_BOX);
b->color(FL_RED);
switch(row) {
case 1: grid->widget(b, row, 0, FL_GRID_FILL); break;
case 2: grid->widget(b, row, 0, FL_ALIGN_CENTER); break;
case 3: grid->widget(b, row, 0, FL_ALIGN_BOTTOM_RIGHT); break;
case 4: grid->widget(b, row, 0, FL_ALIGN_BOTTOM_RIGHT); break;
case 5: grid->widget(b, row, 0, FL_ALIGN_TOP_RIGHT); break;
default: break;
}
b = new Fl_Box(0, 0, 20, 20);
b->box(FL_FLAT_BOX);
b->color(FL_GREEN);
c = grid->widget(b, row, 6, FL_ALIGN_CENTER);
}
// two more boxes to demonstrate widget alignment inside the cell
for (int row = 4; row < 6; row++) {
b = new Fl_Box(0, 0, 20, 20); // fixed size, see alignment below
b->box(FL_FLAT_BOX);
b->color(FL_MAGENTA);
c = grid->widget(b, row, 1); // default alignment: FL_GRID_FILL
if (row == 4)
c->align(FL_ALIGN_BOTTOM_LEFT); // alignment uses widget size
if (row == 5)
c->align(FL_ALIGN_TOP_LEFT); // alignment uses widget size
}
// one vertical box (line), spanning 5 rows
b = new Fl_Box(0, 0, 2, 2); // extends vertically
b->box(FL_FLAT_BOX);
b->color(FL_BLACK);
grid->widget(b, 1, 5, 5, 1, FL_GRID_VERTICAL | FL_ALIGN_RIGHT);
// add a textbox with label or title, spanning 5 cells, centered
b = new Fl_Box(0, 0, 1, 1); // variable size
b->label("Hello, Fl_Grid !");
b->labelfont(FL_BOLD + FL_ITALIC);
b->labelsize(30);
b->labeltype(FL_SHADOW_LABEL);
grid->widget(b, 1, 1, 1, 5); // rowspan = 1, colspan = 5
// add a footer textbox, spanning 3 cells, right aligned
b = new Fl_Box(0, 0, 1, 10); // variable size
b->label("FLTK/test/grid_alignment.cxx");
b->labelfont(FL_COURIER);
b->labelsize(11);
b->align(FL_ALIGN_INSIDE | FL_ALIGN_RIGHT);
grid->widget(b, 5, 2, 1, 3, FL_GRID_HORIZONTAL | FL_ALIGN_BOTTOM);
// input widgets with fixed size and alignment inside the cell
Fl_Input *i1 = new Fl_Input(0, 0, 100, 30, "Username:");
c = grid->widget(i1, 2, 3, 1, 2); // widget, col, row, colspan, rowspan
c->align(FL_GRID_HORIZONTAL); // widget alignment in cell
Fl_Input *i2 = new Fl_Input(0, 0, 100, 30, "Password:");
c = grid->widget(i2, 3, 3, 1, 2); // widget, col, row, colspan, rowspan
c->align(FL_GRID_HORIZONTAL); // widget alignment in cell
// the login button spans 2 columns
Fl_Button *bt = new Fl_Button(0, 0, 10, 30, "Login");
grid->widget(bt, 4, 3, 1, 2, FL_GRID_HORIZONTAL); // widget, col, row, colspan, rowspan, alignment
grid->row_weight(1, 90);
grid->row_weight(2, 0);
grid->row_weight(3, 0);
grid->row_weight(4, 0);
grid->col_weight(0, 30);
grid->col_weight(4, 90);
grid->row_gap(5, 12);
grid->end();
grid->layout();
grid->debug(0);
// grid->show_grid(1); // enable to display grid helper lines
win->end();
win->resizable(grid);
win->size_range(440, 350);
win->show(argc, argv);
#if (TEST_RELAYOUT)
Fl::add_timeout(5.0, relayout_cb, grid);
#endif
#if (TEST_REMOVE_NOTIFY)
Fl::add_timeout(3.0, remove_cb, grid);
#endif
// return Fl::run();
int ret = Fl::run();
grid->clear_layout();
delete win;
return ret;
}
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