fl_ask.cxx

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//
// "$Id: fl_ask.cxx 8136 2010-12-29 11:51:29Z manolo $"
//
// Standard dialog functions for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2010 by Bill Spitzak and others.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
// Please report all bugs and problems on the following page:
//
//     http://www.fltk.org/str.php
//

// Implementation of fl_message, fl_ask, fl_choice, fl_input
// The three-message fl_show_x functions are for forms compatibility
// mostly.  In most cases it is easier to get a multi-line message
// by putting newlines in the message.

#include <stdio.h>
#include <stdarg.h>
#include "flstring.h"

#include <FL/Fl.H>

#include <FL/fl_ask.H>

#include <FL/Fl_Box.H>
#include <FL/Fl_Button.H>
#include <FL/Fl_Return_Button.H>
#include <FL/Fl_Window.H>
#include <FL/Fl_Input.H>
#include <FL/Fl_Secret_Input.H>
#include <FL/x.H>
#include <FL/fl_draw.H>

static Fl_Window *message_form;
static Fl_Box *message;
static Fl_Box *icon;
static Fl_Button *button[3];
static Fl_Input *input;
static int ret_val;
static const char *iconlabel = "?";
Fl_Font fl_message_font_ = FL_HELVETICA;
Fl_Fontsize fl_message_size_ = 14;
#ifdef __APPLE__
extern "C" void NSBeep(void);
#endif

static char avoidRecursion = 0;

// Sets the global return value (ret_val) and closes the window.
// Note: this is used for the button callbacks and the window
// callback (closing the window with the close button or menu).
// The first argument (Fl_Widget *) can either be an Fl_Button*
// pointer to one of the buttons or an Fl_Window* pointer to the
// message window (message_form).
static void button_cb(Fl_Widget *, void *val) {
  ret_val = (fl_intptr_t)val;
  message_form->hide();
}

static Fl_Window *makeform() {
 if (message_form) {
   message_form->size(410,103);
   return message_form;
 }
 // make sure that the dialog does not become the child of some 
 // current group
 Fl_Group *previously_current_group = Fl_Group::current();
 Fl_Group::current(0);
 // create a new top level window
 Fl_Window *w = message_form = new Fl_Window(410,103,"");
 message_form->callback(button_cb,(void *)0);
 // w->clear_border();
 // w->box(FL_UP_BOX);
 (message = new Fl_Box(60, 25, 340, 20))
   ->align(FL_ALIGN_LEFT|FL_ALIGN_INSIDE|FL_ALIGN_WRAP);
 (input = new Fl_Input(60, 37, 340, 23))->hide();
 {Fl_Box* o = icon = new Fl_Box(10, 10, 50, 50);
  o->box(FL_THIN_UP_BOX);
  o->labelfont(FL_TIMES_BOLD);
  o->labelsize(34);
  o->color(FL_WHITE);
  o->labelcolor(FL_BLUE);
 }
 // create the buttons (right to left)
 for (int b=0, x=310; b<3; b++, x -= 100) {
   if (b==1)
     button[b] = new Fl_Return_Button(x, 70, 90, 23);
   else
     button[b] = new Fl_Button(x, 70, 90, 23);
   button[b]->align(FL_ALIGN_INSIDE|FL_ALIGN_WRAP);
   button[b]->callback(button_cb,(void *)b);
 }
 button[0]->shortcut(FL_Escape);
 w->resizable(new Fl_Box(60,10,110-60,27));
 w->end();
 w->set_modal();
 Fl_Group::current(previously_current_group);
 return w;
}

/*
 * 'resizeform()' - Resize the form and widgets so that they hold everything
 *                  that is asked of them...
 */

void resizeform() {
  int   i;
  int   message_w, message_h;
  int   text_height;
  int   button_w[3], button_h[3];
  int   x, w, h, max_w, max_h;
        const int icon_size = 50;

  fl_font(fl_message_font_, fl_message_size_);
  message_w = message_h = 0;
  fl_measure(message->label(), message_w, message_h);

  message_w += 10;
  message_h += 10;
  if (message_w < 340)
    message_w = 340;
  if (message_h < 30)
    message_h = 30;

  fl_font(button[0]->labelfont(), button[0]->labelsize());

  memset(button_w, 0, sizeof(button_w));
  memset(button_h, 0, sizeof(button_h));

  for (max_h = 25, i = 0; i < 3; i ++)
    if (button[i]->visible())
    {
      fl_measure(button[i]->label(), button_w[i], button_h[i]);

      if (i == 1)
        button_w[1] += 20;

      button_w[i] += 30;
      button_h[i] += 10;

      if (button_h[i] > max_h)
        max_h = button_h[i];
    }

  if (input->visible()) text_height = message_h + 25;
  else text_height = message_h;

  max_w = message_w + 10 + icon_size;
  w     = button_w[0] + button_w[1] + button_w[2] - 10;

  if (w > max_w)
    max_w = w;

  message_w = max_w - 10 - icon_size;

  w = max_w + 20;
  h = max_h + 30 + text_height;

  message_form->size(w, h);
  message_form->size_range(w, h, w, h);

  message->resize(20 + icon_size, 10, message_w, message_h);
  icon->resize(10, 10, icon_size, icon_size);
  icon->labelsize(icon_size - 10);
  input->resize(20 + icon_size, 10 + message_h, message_w, 25);

  for (x = w, i = 0; i < 3; i ++)
    if (button_w[i])
    {
      x -= button_w[i];
      button[i]->resize(x, h - 10 - max_h, button_w[i] - 10, max_h);

//      printf("button %d (%s) is %dx%d+%d,%d\n", i, button[i]->label(),
//             button[i]->w(), button[i]->h(),
//           button[i]->x(), button[i]->y());
    }
}

static int innards(const char* fmt, va_list ap,
  const char *b0,
  const char *b1,
  const char *b2)
{
  Fl::pushed(0); // stop dragging (STR #2159)

  avoidRecursion = 1;

  makeform();
  char buffer[1024];
  if (!strcmp(fmt,"%s")) {
    message->label(va_arg(ap, const char*));
  } else {
    ::vsnprintf(buffer, 1024, fmt, ap);
    message->label(buffer);
  }

  message->labelfont(fl_message_font_);
  message->labelsize(fl_message_size_);
  if (b0) {button[0]->show(); button[0]->label(b0); button[1]->position(210,70);}
  else {button[0]->hide(); button[1]->position(310,70);}
  if (b1) {button[1]->show(); button[1]->label(b1);}
  else button[1]->hide();
  if (b2) {button[2]->show(); button[2]->label(b2);}
  else button[2]->hide();
  const char* prev_icon_label = icon->label();
  if (!prev_icon_label) icon->label(iconlabel);

  resizeform();

  if (button[1]->visible() && !input->visible()) 
    button[1]->take_focus();
  message_form->hotspot(button[0]);
  if (b0 && Fl_Widget::label_shortcut(b0))
    button[0]->shortcut(0);
  else
    button[0]->shortcut(FL_Escape);

  // deactivate Fl::grab(), because it is incompatible with modal windows
  Fl_Window* g = Fl::grab();
  if (g) Fl::grab(0);
  message_form->show();
  while (message_form->shown()) Fl::wait();
  if (g) // regrab the previous popup menu, if there was one
    Fl::grab(g);
  icon->label(prev_icon_label);

  avoidRecursion = 0;
  return ret_val;
}

// pointers you can use to change FLTK to a foreign language:
const char* fl_no = "No";        
const char* fl_yes= "Yes";       
const char* fl_ok = "OK";        
const char* fl_cancel= "Cancel"; 
const char* fl_close= "Close";   

// fltk functions:
void fl_beep(int type) {
#ifdef WIN32
  switch (type) {
    case FL_BEEP_QUESTION :
    case FL_BEEP_PASSWORD :
      MessageBeep(MB_ICONQUESTION);
      break;
    case FL_BEEP_MESSAGE :
      MessageBeep(MB_ICONASTERISK);
      break;
    case FL_BEEP_NOTIFICATION :
      MessageBeep(MB_ICONASTERISK);
      break;
    case FL_BEEP_ERROR :
      MessageBeep(MB_ICONERROR);
      break;
    default :
      MessageBeep(0xFFFFFFFF);
      break;
  }
#elif defined(__APPLE__)
  switch (type) {
    case FL_BEEP_DEFAULT :
    case FL_BEEP_ERROR :
      NSBeep();
      break;
    default :
      break;
  }  
#else
  switch (type) {
    case FL_BEEP_DEFAULT :
    case FL_BEEP_ERROR :
      if (!fl_display) fl_open_display();

      XBell(fl_display, 100);
      break;
    default :
      if (!fl_display) fl_open_display();

      XBell(fl_display, 50);
      break;
  }
#endif // WIN32
}

void fl_message(const char *fmt, ...) {

  if (avoidRecursion) return;

  va_list ap;

  fl_beep(FL_BEEP_MESSAGE);

  va_start(ap, fmt);
  iconlabel = "i";
  innards(fmt, ap, 0, fl_close, 0);
  va_end(ap);
  iconlabel = "?";
}

void fl_alert(const char *fmt, ...) {

  if (avoidRecursion) return;

  va_list ap;

  fl_beep(FL_BEEP_ERROR);

  va_start(ap, fmt);
  iconlabel = "!";
  innards(fmt, ap, 0, fl_close, 0);
  va_end(ap);
  iconlabel = "?";
}
int fl_ask(const char *fmt, ...) {

  if (avoidRecursion) return 0;

  va_list ap;

  fl_beep(FL_BEEP_QUESTION);

  va_start(ap, fmt);
  int r = innards(fmt, ap, fl_no, fl_yes, 0);
  va_end(ap);

  return r;
}

int fl_choice(const char*fmt,const char *b0,const char *b1,const char *b2,...){

  if (avoidRecursion) return 0;

  va_list ap;

  fl_beep(FL_BEEP_QUESTION);

  va_start(ap, b2);
  int r = innards(fmt, ap, b0, b1, b2);
  va_end(ap);
  return r;
}
Fl_Widget *fl_message_icon() {makeform(); return icon;}

static const char* input_innards(const char* fmt, va_list ap,
                                 const char* defstr, uchar type) {
  makeform();
  message->position(60,10);
  input->type(type);
  input->show();
  input->value(defstr);
  input->take_focus();

  int r = innards(fmt, ap, fl_cancel, fl_ok, 0);
  input->hide();
  message->position(60,25);
  return r ? input->value() : 0;
}

const char* fl_input(const char *fmt, const char *defstr, ...) {

  if (avoidRecursion) return 0;

  fl_beep(FL_BEEP_QUESTION);

  va_list ap;
  va_start(ap, defstr);
  const char* r = input_innards(fmt, ap, defstr, FL_NORMAL_INPUT);
  va_end(ap);
  return r;
}

const char *fl_password(const char *fmt, const char *defstr, ...) {

  if (avoidRecursion) return 0;

  fl_beep(FL_BEEP_PASSWORD);

  va_list ap;
  va_start(ap, defstr);
  const char* r = input_innards(fmt, ap, defstr, FL_SECRET_INPUT);
  va_end(ap);
  return r;
}

//
// End of "$Id: fl_ask.cxx 8136 2010-12-29 11:51:29Z manolo $".
//