161 lines
5.2 KiB
C++
161 lines
5.2 KiB
C++
//
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// Fl_Grid based dialog window for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 2023 by Bill Spitzak and others.
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//
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// This library is free software. Distribution and use rights are outlined in
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// the file "COPYING" which should have been included with this file. If this
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// file is missing or damaged, see the license at:
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//
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// https://www.fltk.org/COPYING.php
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//
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// Please see the following page on how to report bugs and issues:
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//
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// https://www.fltk.org/bugs.php
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//
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// This demo program builds a flexible layout of a dialog similar
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// to fl_ask(), fl_choice(), and others.
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//
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// For <N> buttons we use an Fl_Grid with 2 rows and <N+2> columns:
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// - Cell (0, 0) (III) holds an icon (top left cell)
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// - Cell (0, 1) holds the message text; spans <N+1> columns
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// - Cell (1, n) holds buttons (2 <= n <= <N+1>)
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// - Column 1 (XX) is the resizable column; not used for buttons
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// - Column 2+ is used for buttons
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// _________________________________________________
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// | |
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// | III Some message text ... ... ... ... ... ... |
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// | III more message text ... ... ... ... ... ... |
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// | III more message text ... ... ... ... ... ... |
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// | more message text ... ... ... ... ... ... |
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// | more message text ... ... ... ... ... ... |
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// | XX +––––––––+ +––––+ |
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// | XX [more buttons ...] | Cancel | | OK | |
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// | XX +––––––––+ +––––+ |
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// |_________________________________________________|
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#include <FL/Fl.H>
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#include <FL/Fl_Double_Window.H>
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#include <FL/Fl_Grid.H>
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#include <FL/Fl_Button.H>
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#include <FL/Fl_Box.H>
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static const int ROWS = 2;
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static const int BUTTONS = 4; // default = 4, use 1 to 5 to test
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static const int COLS = BUTTONS + 2;
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static const int BUTTON_H = 25;
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static const int ICON_W = 60;
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static const int ICON_H = 70;
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static const int MARGIN = 10;
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static const int GAP = 8;
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// Button labels (left to right)
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static const char *labels[5] = {
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"Quit", "Copy", "Cancel", "OK", "More ..." };
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static const char *tooltips[5] = {
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"Quit this program",
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"Copy the message text to the clipboard",
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"Cancel - does nothing",
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"OK - does nothing",
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"More buttons could be added here"
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};
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// button widths (left to right) to avoid font calculations
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static const int button_w[5] = { 50, 50, 70, 40, 100};
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static int col_weights[] = { 0, 100, 0, 0, 0, 0, 0 };
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static int row_weights[] = { 100, 0, 0, 0, 0, 0, 0 };
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static const char *message_text =
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"This is a long message in an Fl_Grid based dialog "
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"that may wrap over more than one line. "
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"Resize the window to see how it (un)wraps.";
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Fl_Box *message_box = 0; // global only to simplify the code
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// Common button callback
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void button_cb(Fl_Widget *w, void *v) {
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int val = fl_int(v);
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printf("Button %d: '%s'\n", val, w->label());
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switch(val) {
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case 0: // Quit
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w->window()->hide();
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break;
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case 1: { // Copy
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const char *text = message_box->label();
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const int len = (int)strlen(text);
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Fl::copy(text, len, 1);
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}
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printf("Message copied to clipboard.\n");
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break;
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default:
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break;
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}
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fflush(stdout);
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}
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int main(int argc, char **argv) {
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int min_w = ICON_W + 2 * MARGIN + (BUTTONS + 1) * GAP;
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int min_h = ICON_H + 10 + 2 * MARGIN + GAP + BUTTON_H;
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for (int i = 0; i < BUTTONS; i++) {
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min_w += button_w[i];
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}
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Fl_Double_Window *win = new Fl_Double_Window(min_w, min_h, "Fl_Grid Based Dialog");
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Fl_Grid *grid = new Fl_Grid(0, 0, win->w(), win->h());
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grid->layout(ROWS, COLS, MARGIN, GAP);
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grid->color(FL_WHITE);
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grid->tooltip("Resize the window to see this dialog \"in action\"");
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// Child 0: Fl_Box for the "icon" or image (fixed size)
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Fl_Box *icon = new Fl_Box(0, 0, ICON_W, ICON_H, "ICON");
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grid->widget(icon, 0, 0, 1, 1, FL_GRID_TOP);
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icon->box(FL_THIN_UP_BOX);
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icon->color(0xddffff00);
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icon->align(FL_ALIGN_CENTER|FL_ALIGN_INSIDE|FL_ALIGN_CLIP);
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icon->tooltip("This could also be a full Fl_Image or subclass thereof");
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// Child 1: the message box
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message_box = new Fl_Box(0, 0, 0, 0);
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grid->widget(message_box, 0, 1, 1, BUTTONS + 1, FL_GRID_FILL);
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message_box->label(message_text);
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message_box->align(FL_ALIGN_TOP|FL_ALIGN_INSIDE|FL_ALIGN_WRAP);
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message_box->tooltip("The text in this box can be copied to the clipboard");
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// Children 2++: the buttons (left to right for tab navigation order)
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for (int i = 0; i < BUTTONS; i++) {
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Fl_Button *b = new Fl_Button(0, 0, button_w[i], BUTTON_H, labels[i]);
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grid->widget(b, 1, i + 2);
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b->callback(button_cb, fl_voidptr(i));
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b->tooltip(tooltips[i]);
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}
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grid->end();
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// set row and column weights for resizing
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grid->row_weight(row_weights, ROWS);
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grid->col_weight(col_weights, COLS);
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// Set environment variable "FLTK_GRID_DEBUG=1" or uncomment this line:
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// grid->show_grid(1); // enable to display grid helper lines
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win->end();
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win->resizable(grid);
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win->size_range(min_w, min_h, 3 * min_w, min_h + 50);
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win->show(argc, argv);
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int ret = Fl::run();
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delete win; // not necessary but useful to test for memory leaks
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return ret;
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}
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