apps/gui/buttonbar.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
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   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) Linus Nielsen Feltzing (2002)
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21 /*
  22 2005 Kevin Ferrare :
  23  - Multi screen support
  24  - Rewrote a lot of code to avoid global vars and make it accept eventually
  25    more that 3 buttons on the bar (just the prototype of gui_buttonbar_set
  26    and the constant BUTTONBAR_MAX_BUTTONS to modify)
  27 2008 Jonathan Gordon
  28  - redone to use viewports, items will NOT scroll in their vp.
  29    Bar is always drawn at the bottom of the screen. This may be changed later.
  30    Callers need to remember to adjust their viewports to not be overwitten
  31 */
  32 #include "config.h"
  33 #include "buttonbar.h"
  34 #include "viewport.h"
  35 #include "lcd.h"
  36 #include "font.h"
  37 #include "string.h"
  38 #include "settings.h"
  39
  40 static struct viewport bb_vp[NB_SCREENS];
  41 void gui_buttonbar_init(struct gui_buttonbar * buttonbar)
  42 {
  43     int i;
  44     gui_buttonbar_unset(buttonbar);
  45     FOR_NB_SCREENS(i)
  46     {
  47         viewport_set_defaults(&bb_vp[i], i);
  48         bb_vp[i].font = FONT_SYSFIXED;
  49         bb_vp[i].y = screens[i].height - BUTTONBAR_HEIGHT;
  50         bb_vp[i].height = BUTTONBAR_HEIGHT;
  51         bb_vp[i].drawmode = DRMODE_COMPLEMENT;
  52     }
  53 }
  54
  55 void gui_buttonbar_set_display(struct gui_buttonbar * buttonbar,
  56                                struct screen * display)
  57 {
  58     buttonbar->display = display;
  59 }
  60
  61 static void gui_buttonbar_draw_button(struct gui_buttonbar * buttonbar, int num)
  62 {
  63     int button_width;
  64     int fh, fw;
  65     struct screen * display = buttonbar->display;
  66     struct viewport vp = bb_vp[display->screen_type];
  67
  68     button_width = display->width/BUTTONBAR_MAX_BUTTONS;
  69     vp.width = button_width;
  70     vp.x = button_width * num;
  71     display->set_viewport(&vp);
  72     display->fillrect(0, 0, button_width - 1, vp.height);
  73     if(buttonbar->caption[num][0] != 0)
  74     {
  75         display->getstringsize(buttonbar->caption[num], &fw, &fh);
  76         display->putsxy((button_width - fw)/2,
  77                         (vp.height-fh)/2, buttonbar->caption[num]);
  78     }
  79 }
  80
  81 void gui_buttonbar_set(struct gui_buttonbar * buttonbar,
  82                        const char *caption1,
  83                        const char *caption2,
  84                        const char *caption3)
  85 {
  86     gui_buttonbar_unset(buttonbar);
  87     if(caption1)
  88     {
  89         strncpy(buttonbar->caption[0], caption1, 7);
  90         buttonbar->caption[0][7] = 0;
  91     }
  92     if(caption2)
  93     {
  94         strncpy(buttonbar->caption[1], caption2, 7);
  95         buttonbar->caption[1][7] = 0;
  96     }
  97     if(caption3)
  98     {
  99         strncpy(buttonbar->caption[2], caption3, 7);
 100         buttonbar->caption[2][7] = 0;
 101     }
 102 }
 103
 104 void gui_buttonbar_unset(struct gui_buttonbar * buttonbar)
 105 {
 106     int i;
 107     for(i = 0;i < BUTTONBAR_MAX_BUTTONS;i++)
 108         buttonbar->caption[i][0] = 0;
 109 }
 110
 111 void gui_buttonbar_draw(struct gui_buttonbar * buttonbar)
 112 {
 113     struct screen * display = buttonbar->display;
 114     if(!global_settings.buttonbar || !gui_buttonbar_isset(buttonbar))
 115         return;
 116     int i;
 117     display->set_viewport(&bb_vp[display->screen_type]);
 118     display->clear_viewport();
 119     for(i = 0;i < BUTTONBAR_MAX_BUTTONS;i++)
 120         gui_buttonbar_draw_button(buttonbar, i);
 121     display->set_viewport(&bb_vp[display->screen_type]);
 122     display->update_viewport();
 123     display->set_viewport(NULL);
 124 }
 125
 126 bool gui_buttonbar_isset(struct gui_buttonbar * buttonbar)
 127 {
 128     /* If all buttons are unset, the button bar is considered disabled */
 129     int i;
 130     for(i = 0;i < BUTTONBAR_MAX_BUTTONS;i++)
 131         if(buttonbar->caption[i][0] != 0)
 132             return true;
 133     return false;
 134 }