textscreen/txt_label.c

   1 // Emacs style mode select   -*- C++ -*-
   2 //-----------------------------------------------------------------------------
   3 //
   4 // Copyright(C) 2006 Simon Howard
   5 //
   6 // This program is free software; you can redistribute it and/or
   7 // modify it under the terms of the GNU General Public License
   8 // as published by the Free Software Foundation; either version 2
   9 // of the License, or (at your option) any later version.
  10 //
  11 // This program is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15 //
  16 // You should have received a copy of the GNU General Public License
  17 // along with this program; if not, write to the Free Software
  18 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  19 // 02111-1307, USA.
  20 //
  21
  22 #include <stdlib.h>
  23 #include <string.h>
  24
  25 #include "txt_label.h"
  26 #include "txt_gui.h"
  27 #include "txt_io.h"
  28 #include "txt_main.h"
  29 #include "txt_window.h"
  30
  31 static void TXT_LabelSizeCalc(TXT_UNCAST_ARG(label))
  32 {
  33     TXT_CAST_ARG(txt_label_t, label);
  34
  35     label->widget.w = label->w;
  36     label->widget.h = label->h;
  37 }
  38
  39 static void TXT_LabelDrawer(TXT_UNCAST_ARG(label), int selected)
  40 {
  41     TXT_CAST_ARG(txt_label_t, label);
  42     unsigned int x, y;
  43     int origin_x, origin_y;
  44     unsigned int align_indent = 0;
  45     unsigned int w;
  46
  47     w = label->widget.w;
  48
  49     TXT_BGColor(label->bgcolor, 0);
  50     TXT_FGColor(label->fgcolor);
  51
  52     TXT_GetXY(&origin_x, &origin_y);
  53
  54     for (y=0; y<label->h; ++y)
  55     {
  56         // Calculate the amount to indent this line due to the align
  57         // setting
  58
  59         switch (label->widget.align)
  60         {
  61             case TXT_HORIZ_LEFT:
  62                 align_indent = 0;
  63                 break;
  64             case TXT_HORIZ_CENTER:
  65                 align_indent = (label->w - strlen(label->lines[y])) / 2;
  66                 break;
  67             case TXT_HORIZ_RIGHT:
  68                 align_indent = label->w - strlen(label->lines[y]);
  69                 break;
  70         }
  71
  72         // Draw this line
  73
  74         TXT_GotoXY(origin_x, origin_y + y);
  75
  76         // Gap at the start
  77
  78         for (x=0; x<align_indent; ++x)
  79         {
  80             TXT_DrawString(" ");
  81         }
  82
  83         // The string itself
  84
  85         TXT_DrawString(label->lines[y]);
  86         x += strlen(label->lines[y]);
  87
  88         // Gap at the end
  89
  90         for (; x<w; ++x)
  91         {
  92             TXT_DrawString(" ");
  93         }
  94     }
  95 }
  96
  97 static void TXT_LabelDestructor(TXT_UNCAST_ARG(label))
  98 {
  99     TXT_CAST_ARG(txt_label_t, label);
 100
 101     free(label->label);
 102     free(label->lines);
 103 }
 104
 105 txt_widget_class_t txt_label_class =
 106 {
 107     TXT_LabelSizeCalc,
 108     TXT_LabelDrawer,
 109     NULL,
 110     TXT_LabelDestructor,
 111     NULL,
 112     NULL,
 113 };
 114
 115 void TXT_SetLabel(txt_label_t *label, char *value)
 116 {
 117     char *p;
 118     unsigned int y;
 119
 120     // Free back the old label
 121
 122     free(label->label);
 123     free(label->lines);
 124
 125     // Set the new value
 126
 127     label->label = strdup(value);
 128
 129     // Work out how many lines in this label
 130
 131     label->h = 1;
 132
 133     for (p = value; *p != '\0'; ++p)
 134     {
 135         if (*p == '\n')
 136         {
 137             ++label->h;
 138         }
 139     }
 140
 141     // Split into lines
 142
 143     label->lines = malloc(sizeof(char *) * label->h);
 144     label->lines[0] = label->label;
 145     y = 1;
 146
 147     for (p = label->label; *p != '\0'; ++p)
 148     {
 149         if (*p == '\n')
 150         {
 151             label->lines[y] = p + 1;
 152             *p = '\0';
 153             ++y;
 154         }
 155     }
 156
 157     label->w = 0;
 158
 159     for (y=0; y<label->h; ++y)
 160     {
 161         if (strlen(label->lines[y]) > label->w)
 162             label->w = strlen(label->lines[y]);
 163     }
 164 }
 165
 166 txt_label_t *TXT_NewLabel(char *text)
 167 {
 168     txt_label_t *label;
 169
 170     label = malloc(sizeof(txt_label_t));
 171
 172     TXT_InitWidget(label, &txt_label_class);
 173     label->widget.selectable = 0;
 174     label->label = NULL;
 175     label->lines = NULL;
 176
 177     // Default colors
 178
 179     label->bgcolor = TXT_COLOR_BLUE;
 180     label->fgcolor = TXT_COLOR_BRIGHT_WHITE;
 181
 182     TXT_SetLabel(label, text);
 183
 184     return label;
 185 }
 186
 187 void TXT_SetFGColor(txt_label_t *label, txt_color_t color)
 188 {
 189     label->fgcolor = color;
 190 }
 191
 192 void TXT_SetBGColor(txt_label_t *label, txt_color_t color)
 193 {
 194     label->bgcolor = color;
 195 }
 196