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fltk/test/demo.cxx

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//
// Main demo program for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2021 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
//
/*
General information on directory structure and file handling.
The "classic" autotools/make system creates executables in their source
folders, i.e. fluid/fluid, test/demo and test/xyz, resp.. The menu file is
in folder test/, as is the main demo(.exe) program. In the following text
and directory lists all test and demo executables are represented by "demo"
and the fluid executable by "fluid", no matter what OS (under Windows: *.exe).
The CMake build system generates all executables in the build tree and copies
the supporting test data files to the build tree as well. This structure is
different and needs to be handled separately in this program.
Additionally, different OS platforms create different types of files, for
instance "app bundles" on macOS. All this needs to be considered.
The overall structure, relative to the FLTK source dir (fltk) and the build
tree (build):
(1) Autotools / Make:
fltk/fluid fluid (../fluid/fluid)
fltk/test demo, demo.menu, working directory, data files
fltk/test/images images for help_dialog(.html)
(2) CMake + make (e.g. Unix)
build/bin fluid
build/bin/test test and demo programs
build/data demo.menu, working directory, data files
build/data/images images for help_dialog(.html)
(3) CMake + Visual Studio (TYPE == build type: Debug, Release, ...)
build/bin/TYPE fluid
build/bin/test/TYPE test and demo programs
build/data demo.menu, working directory, data files
build/data/images images for help_dialog(.html)
(4) macOS The setup is similar to Windows and Linux:
Makefiles: like (1) or (2)
Xcode: like (3), i.e. similar to VS layout
The built executable 'demo' can also be executed with the menu filename
as commandline argument. In this case all the support (data) files are
expected to be in the same directory as the menu file or relative paths
as needed by the test programs, for instance help_dialog which needs
help_dialog.html and related image files.
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#if defined __APPLE__
#include <ApplicationServices/ApplicationServices.h>
#endif
#include <FL/Fl.H>
#include <FL/Fl_Double_Window.H>
#include <FL/Fl_Box.H>
#include <FL/Fl_Button.H>
#include <FL/Fl_Menu_Button.H> // right click popup menu
#include <FL/Fl_Choice.H>
#include <FL/Fl_Simple_Terminal.H> // tty
#include <FL/filename.H>
#include <FL/platform.H>
#include <FL/fl_ask.H> // fl_alert()
#include <FL/fl_utf8.h> // fl_getcwd()
#define FORM_W 350
#define FORM_H 440
#define TTY_W int(FORM_W*2.5)
#define TTY_H 200
/* The form description */
void doexit(Fl_Widget *, void *);
void doback(Fl_Widget *, void *);
void dobut(Fl_Widget *, long);
void doscheme(Fl_Choice *c, void *) {
Fl::scheme(c->text(c->value()));
}
Fl_Double_Window *form = 0;
Fl_Group *demogrp = 0;
Fl_Simple_Terminal *tty = 0;
Fl_Button *but[9];
// Allocate space to edit commands and arguments from demo.menu.
// We "trust demo.menu" that strings don't overflow
char cmdbuf[256]; // commandline w/o arguments
char params[256]; // commandline arguments
// Global path variables for all platforms and build systems
// to avoid duplication and dynamic allocation
char app_path [FL_PATH_MAX]; // directory of all demo binaries
char fluid_path [FL_PATH_MAX]; // binary directory of fluid
char data_path [FL_PATH_MAX]; // working directory of all demos
char command [2 * FL_PATH_MAX + 40]; // command to be executed
// platform specific suffix for executable files
#ifdef _WIN32
const char *suffix = ".exe";
#elif defined __APPLE__
const char *suffix = ".app";
#else
const char *suffix = "";
#endif
// CMake defines the "build type" subdirectory for multi configuration
// build setups like Visual Studio and Xcode
#ifdef CMAKE_INTDIR
const char *cmake_intdir = "/" CMAKE_INTDIR;
#else
const char *cmake_intdir = 0;
#endif
// debug output function
void debug_var(const char *varname, const char *value) {
tty->printf("%-10s = %s\n", varname, value);
}
// Show or hide the tty window
void show_tty(int val) {
if ( val ) {
form->size_range(FORM_W,FORM_H+TTY_H,0,0); // allow resizing
form->size(TTY_W,FORM_H+TTY_H); // demo + height for tty
demogrp->size(FORM_W,FORM_H);
tty->show(); // show tty
tty->resize(0, FORM_H, TTY_W, TTY_H); // force tty position
} else {
form->size_range(FORM_W,FORM_H,FORM_W,FORM_H); // no resizing
tty->hide(); // hide tty
form->size(FORM_W, FORM_H); // normal demo size
}
demogrp->size(FORM_W, FORM_H);
form->init_sizes();
}
// Right click popup menu handler
void popup_menu_cb(Fl_Widget*, void *userdata) {
const char *cmd = (const char*)userdata;
if ( strcmp(cmd, "showtty")==0 ) { show_tty(1); }
if ( strcmp(cmd, "hidetty")==0 ) { show_tty(0); }
}
void create_the_forms() {
Fl_Widget *obj;
Fl_Menu_Button *popup;
form = new Fl_Double_Window(FORM_W,FORM_H);
form->size_range(FORM_W,FORM_H,FORM_W+1,FORM_H+1); // XXX: +1 needed or window can't be made resizable later
// Small terminal window parented to window, not demogrp
tty = new Fl_Simple_Terminal(0, form->h(), form->w(), form->h());
tty->history_lines(50);
tty->ansi(true);
tty->hide();
tty->textsize(10);
// Parent group for demo
demogrp = new Fl_Group(0,0,FORM_W,FORM_H);
demogrp->resizable(0);
demogrp->begin();
// Demo
obj = new Fl_Box(FL_FRAME_BOX,10,15,330,40,"FLTK Demonstration");
obj->color(FL_GRAY-4);
obj->labelsize(24);
obj->labelfont(FL_BOLD);
obj->labeltype(FL_ENGRAVED_LABEL);
obj = new Fl_Box(FL_FRAME_BOX,10,65,330,330,0);
obj->color(FL_GRAY-8);
obj = new Fl_Button(280,405,60,25,"Exit");
obj->callback(doexit);
Fl_Choice *choice = new Fl_Choice(75, 405, 100, 25, "Scheme:");
choice->labelfont(FL_HELVETICA_BOLD);
choice->add("none");
choice->add("gtk+");
choice->add("gleam");
choice->add("plastic");
choice->callback((Fl_Callback *)doscheme);
Fl::scheme(NULL);
if (!Fl::scheme()) choice->value(0);
else if (!strcmp(Fl::scheme(), "gtk+")) choice->value(1);
else if (!strcmp(Fl::scheme(), "gleam")) choice->value(2);
else if (!strcmp(Fl::scheme(), "plastic")) choice->value(3);
else choice->value(0);
obj = new Fl_Button(10,15,330,380); obj->type(FL_HIDDEN_BUTTON);
obj->callback(doback);
obj = but[0] = new Fl_Button( 30, 85,90,90);
obj = but[1] = new Fl_Button(130, 85,90,90);
obj = but[2] = new Fl_Button(230, 85,90,90);
obj = but[3] = new Fl_Button( 30,185,90,90);
obj = but[4] = new Fl_Button(130,185,90,90);
obj = but[5] = new Fl_Button(230,185,90,90);
obj = but[6] = new Fl_Button( 30,285,90,90);
obj = but[7] = new Fl_Button(130,285,90,90);
obj = but[8] = new Fl_Button(230,285,90,90);
for (int i=0; i<9; i++) {
but[i]->align(FL_ALIGN_WRAP);
but[i]->callback(dobut, i);
}
demogrp->end();
// Right click popup menu
popup = new Fl_Menu_Button(0,0,FORM_W,FORM_H);
popup->box(FL_NO_BOX);
popup->type(Fl_Menu_Button::POPUP3); // pop menu on right-click
popup->add("Show debug terminal", 0, popup_menu_cb, (void*)"showtty");
popup->add("Hide debug terminal", 0, popup_menu_cb, (void*)"hidetty");
// End window
form->end();
form->resizable(tty);
}
/* Maintaining and building up the menus. */
typedef struct {
char name[64];
int numb;
char iname[9][64];
char icommand[9][64];
} MENU;
#define MAXMENU 32
MENU menus[MAXMENU];
int mennumb = 0;
/* Return the number of a given menu name. */
int find_menu(const char* nnn) {
int i;
for (i=0; i<mennumb; i++)
if (strcmp(menus[i].name,nnn) == 0) return i;
return -1;
}
/* Create a new menu with name nnn */
void create_menu(const char* nnn) {
if (mennumb == MAXMENU -1) return;
strcpy(menus[mennumb].name,nnn);
menus[mennumb].numb = 0;
mennumb++;
}
/* Add an item to a menu */
void addto_menu(const char* men, const char* item, const char* comm) {
int n = find_menu(men);
if (n<0) { create_menu(men); n = find_menu(men); }
if (menus[n].numb == 9) return;
strcpy(menus[n].iname[menus[n].numb],item);
strcpy(menus[n].icommand[menus[n].numb],comm);
menus[n].numb++;
}
/* Button to Item conversion and back. */
int b2n[][9] = {
{ -1, -1, -1, -1, 0, -1, -1, -1, -1},
{ -1, -1, -1, 0, -1, 1, -1, -1, -1},
{ 0, -1, -1, -1, 1, -1, -1, -1, 2},
{ 0, -1, 1, -1, -1, -1, 2, -1, 3},
{ 0, -1, 1, -1, 2, -1, 3, -1, 4},
{ 0, -1, 1, 2, -1, 3, 4, -1, 5},
{ 0, -1, 1, 2, 3, 4, 5, -1, 6},
{ 0, 1, 2, 3, -1, 4, 5, 6, 7},
{ 0, 1, 2, 3, 4, 5, 6, 7, 8}
};
int n2b[][9] = {
{ 4, -1, -1, -1, -1, -1, -1, -1, -1},
{ 3, 5, -1, -1, -1, -1, -1, -1, -1},
{ 0, 4, 8, -1, -1, -1, -1, -1, -1},
{ 0, 2, 6, 8, -1, -1, -1, -1, -1},
{ 0, 2, 4, 6, 8, -1, -1, -1, -1},
{ 0, 2, 3, 5, 6, 8, -1, -1, -1},
{ 0, 2, 3, 4, 5, 6, 8, -1, -1},
{ 0, 1, 2, 3, 5, 6, 7, 8, -1},
{ 0, 1, 2, 3, 4, 5, 6, 7, 8}
};
/* Transform a button number to an item number when there are
maxnumb items in total. -1 if the button should not exist. */
int but2numb(int bnumb, int maxnumb)
{ return b2n[maxnumb][bnumb]; }
/* Transform an item number to a button number when there are
maxnumb items in total. -1 if the item should not exist. */
int numb2but(int inumb, int maxnumb)
{ return n2b[maxnumb][inumb]; }
/* Pushing and Popping menus */
char stack[64][32];
int stsize = 0;
/* Push a menu to be visible */
void push_menu(const char* nnn) {
int n,i,bn;
int men = find_menu(nnn);
if (men < 0) return;
n = menus[men].numb;
for (i=0; i<9; i++) but[i]->hide();
for (i=0; i<n; i++)
{
bn = numb2but(i,n-1);
but[bn]->show();
but[bn]->label(menus[men].iname[i]);
if (menus[men].icommand[i][0] != '@') but[bn]->tooltip(menus[men].icommand[i]);
else but[bn]->tooltip(0);
}
if (stack[stsize]!=nnn)
strcpy(stack[stsize],nnn);
stsize++;
}
/* Pop a menu */
void pop_menu() {
if (stsize<=1) return;
stsize -= 2;
push_menu(stack[stsize]);
}
/* The callback Routines */
/* Handle a button push */
void dobut(Fl_Widget *, long arg) {
int men = find_menu(stack[stsize-1]);
int n = menus[men].numb;
int bn = but2numb( (int) arg, n-1);
// menu ?
if (menus[men].icommand[bn][0] == '@') {
push_menu(menus[men].icommand[bn]);
return;
}
// not a menu: run test/demo/fluid executable
// find and separate "command" and "params"
// skip leading spaces in command
char *start_command = menus[men].icommand[bn];
while (*start_command == ' ') ++start_command;
strcpy(cmdbuf, start_command); // here still full command w/params
// find the space between the command and parameters if one exists
char *start_params = strchr(cmdbuf, ' ');
if (start_params) {
*start_params = '\0'; // terminate command
start_params++; // skip space
strcpy(params, start_params); // copy parameters
} else {
params[0] = '\0'; // empty string
}
// select application path: either app_path or fluid_path
const char *path = app_path;
if (!strncmp(cmdbuf, "fluid", 5))
path = fluid_path;
// format commandline with optional parameters
#if defined(__APPLE__) // macOS
if (params[0]) {
// we assume that we have only one argument which is a filename in 'data_path'
sprintf(command, "open '%s/%s%s' --args '%s/%s'", path, cmdbuf, suffix, data_path, params);
} else {
sprintf(command, "open '%s/%s%s'", path, cmdbuf, suffix);
}
#else // other platforms
if (params[0])
sprintf(command, "%s/%s%s %s", path, cmdbuf, suffix, params);
else
sprintf(command, "%s/%s%s", path, cmdbuf, suffix);
#endif
// finally, execute program (the system specific part)
#ifdef _WIN32
STARTUPINFO suInfo; // Process startup information
PROCESS_INFORMATION prInfo; // Process information
memset(&suInfo, 0, sizeof(suInfo));
suInfo.cb = sizeof(suInfo);
debug_var("Command", command);
BOOL stat = CreateProcess(NULL, command, NULL, NULL, FALSE,
NORMAL_PRIORITY_CLASS, NULL,
NULL, &suInfo, &prInfo);
if (!stat) {
DWORD err = GetLastError();
fl_alert("Error starting process, error #%lu\n'%s'", err, command);
}
#elif defined __APPLE__
debug_var("Command", command);
system(command);
#else // other platforms (Unix, Linux)
strcat(command, " &"); // run in background
debug_var("Command", command);
if (system(command) == -1) {
fl_alert("Could not start program, errno = %d\n'%s'", errno, command);
}
#endif // _WIN32
}
void doback(Fl_Widget *, void *) {pop_menu();}
void doexit(Fl_Widget *, void *) {exit(0);}
/*
Load the menu file. Returns whether successful.
*/
int load_the_menu(const char * const menu) {
FILE *fin = 0;
char line[256], mname[64],iname[64],cname[64];
int i, j;
fin = fl_fopen(menu, "r");
if (fin == NULL)
return 0;
for (;;) {
if (fgets(line,256,fin) == NULL) break;
// remove all carriage returns that Cygwin may have inserted
char *s = line, *d = line;
for (;;++d) {
while (*s=='\r') s++;
*d = *s++;
if (!*d) break;
}
// interpret the line
j = 0; i = 0;
while (line[i] == ' ' || line[i] == '\t') i++;
if (line[i] == '\n') continue;
if (line[i] == '#') continue;
while (line[i] != ':' && line[i] != '\n') mname[j++] = line[i++];
mname[j] = '\0';
if (line[i] == ':') i++;
j = 0;
while (line[i] != ':' && line[i] != '\n') {
if (line[i] == '\\') {
i++;
if (line[i] == 'n') iname[j++] = '\n';
else iname[j++] = line[i];
i++;
} else
iname[j++] = line[i++];
}
iname[j] = '\0';
if (line[i] == ':') i++;
j = 0;
while (line[i] != ':' && line[i] != '\n') cname[j++] = line[i++];
cname[j] = '\0';
addto_menu(mname,iname,cname);
}
fclose(fin);
return 1;
}
// Fix '\' in Windows paths (convert to '/') and cut off filename (optional, default)
void fix_path(char *path, int strip_filename = 1) {
if (!path[0])
return;
#ifdef _WIN32 // convert '\' to '/'
char *p = path;
while (*p) {
if (*p == '\\')
*p = '/';
p++;
}
#endif // _WIN32
if (strip_filename) {
char *pos = strrchr(path, '/');
if (pos)
*pos = 0;
}
}
int main(int argc, char **argv) {
fl_putenv("FLTK_DOCDIR=../documentation/html"); // used by fluid
char menu[FL_PATH_MAX];
// construct app_path for all executable files
fl_filename_absolute(app_path, sizeof(app_path), argv[0]);
#ifdef __APPLE__
char *q = strstr(app_path, "/Contents/MacOS/");
if (q) *q = 0;
#endif
fix_path(app_path);
// fluid's path is relative to app_path:
// - "../fluid" for autoconf/make builds
// - ".." (parent directory) for single configuration CMake builds
// - "../../$CMAKE_INTDIR" for multi-config (Visual Studio or Xcode) CMake builds
strcpy(fluid_path, app_path);
if (cmake_intdir)
fix_path(fluid_path); // remove intermediate (build type) folder, e.g. "/Debug"
fix_path(fluid_path); // remove folder name ("test")
#if !defined(GENERATED_BY_CMAKE)
strcat(fluid_path, "/fluid");
#else
// CMake: potentially Visual Studio or Xcode (multi config)
if (cmake_intdir)
strcat(fluid_path, cmake_intdir); // append e.g. "/Debug"
#endif // GENERATED_BY_CMAKE
// construct data_path for the menu file and all resources (data files)
// CMake: replace "/bin/test/*" with "/data"
// autotools: use app_path directly
strcpy(data_path, app_path);
#if defined(GENERATED_BY_CMAKE)
{
char *pos = strstr(data_path, "/bin/test");
if (pos)
strcpy(pos, "/data");
}
#endif // GENERATED_BY_CMAKE
// Construct the menu file name, optionally overridden by command args.
// Use data_path and append "/<exe-file-name>.menu"
const char *fn = fl_filename_name(argv[0]);
strcpy(menu, data_path);
strcat(menu, "/");
strcat(menu, fn);
fl_filename_setext(menu, sizeof(menu), ".menu");
// parse commandline
int i = 0;
if (!Fl::args(argc, argv, i) || i < argc-1)
Fl::fatal("Usage: %s <switches> <menufile>\n%s", argv[0], Fl::help);
if (i < argc) {
// override menu file *and* data path !
fl_filename_absolute(menu, sizeof(menu), (const char *)argv[i]);
strcpy(data_path, menu);
fix_path(data_path);
}
// set current work directory to 'data_path'
if (fl_chdir(data_path) == -1) { /* ignore */ }
// Create forms first
// tty needs to exist before we can print debug msgs
//
create_the_forms();
{
char cwd[1024];
fl_getcwd(cwd, sizeof(cwd));
fix_path(cwd, 0);
debug_var("app_path", app_path);
debug_var("fluid_path", fluid_path);
debug_var("data_path", data_path);
debug_var("menu file", menu);
debug_var("cwd", cwd);
tty->printf("\n");
}
if (!load_the_menu(menu))
Fl::fatal("Can't open menu file '%s'", menu);
push_menu("@main");
form->show(argc, argv);
Fl::run();
return 0;
}
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