src/framework/inputtextactivity.cpp

   1 /*
   2  * Copyright (c) 2007-2013, Czirkos Zoltan http://code.google.com/p/gdash/
   3  *
   4  * Permission to use, copy, modify, and distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include "framework/inputtextactivity.hpp"
  18 #include "framework/inputtextactivity.hpp"
  19 #include "gfx/fontmanager.hpp"
  20 #include "gfx/screen.hpp"
  21 #include "cave/helper/colors.hpp"
  22 #include "misc/printf.hpp"
  23
  24 InputTextActivity::InputTextActivity(App *app, char const *title_line, const char *default_text, SmartPtr<Command1Param<std::string> > command_when_successful)
  25     :
  26     Activity(app),
  27     title(title_line),
  28     command_when_successful(command_when_successful),
  29     ms(0), blink(false) {
  30     text = g_string_new(default_text);
  31 }
  32
  33
  34 InputTextActivity::~InputTextActivity() {
  35     g_string_free(text, TRUE);
  36 }
  37
  38
  39 void InputTextActivity::redraw_event() {
  40     int height=6*app->font_manager->get_line_height();
  41     int y1=(app->screen->get_height()-height)/2;    /* middle of the screen */
  42     int cx=2*app->font_manager->get_font_width_narrow(), cy=y1, cw=app->screen->get_width()-2*cx, ch=height;
  43
  44     app->draw_window(cx, cy, cw, ch);
  45     app->screen->set_clip_rect(cx, cy, cw, ch);
  46     int width=cw/app->font_manager->get_font_width_narrow();
  47
  48     app->set_color(GD_GDASH_WHITE);
  49     app->blittext_n(-1, y1+app->font_manager->get_line_height(), title.c_str());
  50     int len = g_utf8_strlen(text->str, -1);
  51     int x;
  52     if (len<width-1)
  53         x=-1; /* if fits on screen (+1 for cursor), centered */
  54     else
  55         x=cx+cw-(len+1)*app->font_manager->get_font_width_narrow();    /* otherwise show end, +1 for cursor */
  56     app->blittext_n(x, y1+3*app->font_manager->get_line_height(), CPrintf("%s%c") % text->str % (blink?'_':' '));
  57     app->screen->remove_clip_rect();
  58     app->screen->flip();
  59 }
  60
  61
  62 void InputTextActivity::keypress_event(KeyCode keycode, int gfxlib_keycode) {
  63     switch (keycode) {
  64         case App::Enter:
  65             command_when_successful->set_param1(text->str);
  66             app->enqueue_command(new PopActivityCommand(app));
  67             app->enqueue_command(command_when_successful);
  68             break;
  69         case App::BackSpace:
  70             if (text->len!=0) {
  71                 char *ptr=text->str+text->len;    /* string pointer + length: points to the terminating zero */
  72                 ptr=g_utf8_prev_char(ptr);    /* step back one utf8 character */
  73                 g_string_truncate(text, ptr-text->str);
  74                 redraw_event();
  75             }
  76             break;
  77         case App::Escape:
  78             app->enqueue_command(new PopActivityCommand(app));
  79             break;
  80         default:
  81             if (keycode >= ' ') {
  82                 g_string_append_unichar(text, keycode);
  83                 redraw_event();
  84             }
  85             break;
  86     }
  87 }
  88
  89
  90 void InputTextActivity::timer_event(int ms_elapsed) {
  91     ms += ms_elapsed;
  92     if (ms > 400) {
  93         blink = !blink;
  94         ms -= 400;
  95         redraw_event();
  96     }
  97 }