Fix numeric keyboard example program
examples/howto-remap-numpad-keyboard-keys.cxx: Substitute Fl::event_key() as well which is required for some input widgets - maybe only on some platforms (seemed to work on X11 but not on Wayland). Also: fix typos and whitespace.
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@ -1,4 +1,19 @@
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// vim: autoindent tabstop=8 shiftwidth=2 expandtab softtabstop=2
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//
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// Numeric keypad demo program for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 1998-2024 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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//
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// Demonstrate keyboard remapping: Force number pad to type numbers even if NumLock off
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//
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@ -21,46 +36,33 @@
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//
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// This demo based on fltk.general thread entitled "keyboard mapping", Aug 2019.
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//
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// * * *
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//
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// Copyright 1998-2017 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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#include <FL/Fl.H>
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#include <FL/Fl_Double_Window.H>
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#include <FL/Fl_Input.H>
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#include <FL/Fl_Check_Button.H>
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//
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Fl_Check_Button *G_checkbut = 0;
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// Global event handler: FLTK calls this after event translation. It's up to us
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// to call Fl::handle_(e,w) to actually deliver the event to the widgets. If we
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// don't and just return, the event will be dropped. See docs for more.
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//
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int MyHandler(int e, Fl_Window *w) {
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// Remapping disabled? Early exit..
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if ( G_checkbut->value() == 0 ) return Fl::handle_(e, w);
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if (G_checkbut->value() == 0)
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return Fl::handle_(e, w);
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// Keyboard key pressed? See if we should remap..
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if ( e == FL_KEYDOWN || e == FL_KEYUP) {
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if (e == FL_KEYDOWN || e == FL_KEYUP) {
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// Get FLTK keycode /before/ NumLock state is applied (see above DESCRIPTION)
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int keycode = Fl::event_original_key(); // get keycode before FLTK applies NumLock
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if ( keycode >= FL_KP && keycode <= FL_KP_Last ) { // keypad key pressed?
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if (keycode >= FL_KP && keycode <= FL_KP_Last) { // keypad key pressed?
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static char buf[2]; // static: we don't want buffer to go out of scope
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buf[0] = char(keycode - FL_KP); // convert keypad keycode -> ascii
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buf[1] = 0; // terminate string (for safety)
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Fl::e_text = buf; // point to our static buffer
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Fl::e_length = 1; // only first char relevant
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Fl::e_keysym = keycode; // note: some input widgets require this too
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}
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}
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return Fl::handle_(e, w); // let FLTK deliver event to widgets
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@ -71,14 +73,14 @@ int main(int argc, char *argv[]) {
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win->begin();
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{
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new Fl_Input(100, 10, 200, 25, "Input:");
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G_checkbut = new Fl_Check_Button(100,40,280,25," Force numeric keypad to type numbers");
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G_checkbut = new Fl_Check_Button(100, 40, 280, 25, "Force numeric keypad to type numbers");
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G_checkbut->labelsize(12);
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G_checkbut->set();
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}
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win->end();
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win->resizable(win);
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win->show(argc, argv);
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win->tooltip("Turn NumLock OFF, then type into Input:\nusing numeric keypadt to test translation");
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win->tooltip("Turn NumLock OFF, then type into Input:\nusing numeric keypad to test translation");
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// Set up our event handler to manage events
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Fl::event_dispatch(MyHandler);
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return(Fl::run());
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