Add an simple example application to open/save files using the FNFC.
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@8096 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
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Greg Ercolano
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@ -4,6 +4,7 @@ ALL = howto-add_fd-and-popen$(EXEEXT) \
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howto-parse-args$(EXEEXT) \
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howto-text-over-image-button$(EXEEXT) \
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menubar-add$(EXEEXT) \
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nativefilechooser-simple-app$(EXEEXT) \
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table-as-container$(EXEEXT) \
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table-simple$(EXEEXT) \
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table-sort$(EXEEXT) \
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144
examples/nativefilechooser-simple-app.cxx
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144
examples/nativefilechooser-simple-app.cxx
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@ -0,0 +1,144 @@
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//
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// "$Id$"
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//
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// An example of how to use Fl_Native_File_Chooser to open & save files.
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//
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// Copyright 2010 Greg Ercolano.
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// Copyright 1998-2010 by Bill Spitzak and others.
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Library General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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// USA.
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//
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// Please report all bugs and problems on the following page:
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//
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// http://www.fltk.org/str.php
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//
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#include <stdio.h> // printf
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#include <stdlib.h> // exit,malloc
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#include <string.h> // strerror
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#include <errno.h> // errno
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#include <FL/Fl.H>
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#include <FL/Fl_Window.H>
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#include <FL/Fl_Menu_Bar.H>
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#include <FL/Fl_Native_File_Chooser.H>
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#include <FL/fl_ask.H>
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class Application : public Fl_Window {
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Fl_Native_File_Chooser *fc;
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// Does file exist?
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int exist(const char *filename) {
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FILE *fp = fopen(filename, "r");
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if (fp) { fclose(fp); return(1); }
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else { return(0); }
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}
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// 'Open' the file
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void open(const char *filename) {
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printf("Open '%s'\n", filename);
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}
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// 'Save' the file
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// Create the file if it doesn't exist
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// and save something in it.
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//
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void save(const char *filename) {
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printf("Saving '%s'\n", filename);
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if ( !exist(filename) ) {
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FILE *fp = fopen(filename, "w"); // create file if it doesn't exist
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if ( fp ) {
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fprintf(fp, "Hello world.\n");
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fclose(fp);
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} else {
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fl_message("Error: %s: %s", filename, strerror(errno));
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}
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}
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}
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// Handle an 'Open' request from the menu
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static void open_cb(Fl_Widget *w, void *v) {
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Application *app = (Application*)v;
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app->fc->title("Open");
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app->fc->type(Fl_Native_File_Chooser::BROWSE_FILE); // only picks files that exist
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switch ( app->fc->show() ) {
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case -1: break; // Error
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case 1: break; // Cancel
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default: // Choice
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app->fc->preset_file(app->fc->filename());
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app->open(app->fc->filename());
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break;
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}
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}
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// Handle a 'Save as' request from the menu
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static void saveas_cb(Fl_Widget *w, void *v) {
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Application *app = (Application*)v;
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app->fc->title("Save As");
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app->fc->type(Fl_Native_File_Chooser::BROWSE_SAVE_FILE); // need this if file doesn't exist yet
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switch ( app->fc->show() ) {
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case -1: break; // Error
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case 1: break; // Cancel
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default: // Choice
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app->fc->preset_file(app->fc->filename());
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app->save(app->fc->filename());
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break;
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}
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}
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// Handle a 'Save' request from the menu
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static void save_cb(Fl_Widget *w, void *v) {
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Application *app = (Application*)v;
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if ( strlen(app->fc->filename()) == 0 ) {
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saveas_cb(w,v);
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} else {
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app->save(app->fc->filename());
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}
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}
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static void quit_cb(Fl_Widget *w, void *v) {
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exit(0);
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}
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// Return an 'untitled' default pathname
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const char* untitled_default() {
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static char *filename = 0;
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if ( !filename ) {
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const char *home =
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getenv("HOME") ? getenv("HOME") : // unix
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getenv("HOME_PATH") ? getenv("HOME_PATH") : // windows
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"."; // other
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filename = (char*)malloc(strlen(home)+20);
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sprintf(filename, "%s/untitled.txt", home);
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}
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return(filename);
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}
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public:
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// CTOR
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Application() : Fl_Window(400,200,"Native File Chooser Example") {
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Fl_Menu_Bar *menu = new Fl_Menu_Bar(0,0,400,25);
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menu->add("&File/&Open", "^o", open_cb, (void*)this);
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menu->add("&File/&Save", "^s", save_cb, (void*)this);
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menu->add("&File/&Save As", 0, saveas_cb, (void*)this);
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menu->add("&File/&Quit", "^q", quit_cb);
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// Initialize the file chooser
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fc = new Fl_Native_File_Chooser();
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fc->filter("Text\t*.txt\n");
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fc->preset_file(untitled_default());
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end();
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}
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};
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int main(int argc, char *argv[]) {
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Fl::scheme("gtk+");
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Application *app = new Application();
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app->show(argc,argv);
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return(Fl::run());
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}
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//
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// End of "$Id$".
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//
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