apps/gui/buttonbar.c

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