Tue, 08 Oct 2019 12:00:31 +0200
Initial import of the CO2 meter application.
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Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
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1 | /* |
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2 | |
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3 | u8g2_selection_list.c |
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4 | |
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5 | selection list with scroll option |
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6 | |
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7 | Universal 8bit Graphics Library (https://github.com/olikraus/u8g2/) |
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8 | |
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9 | Copyright (c) 2016, olikraus@gmail.com |
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10 | All rights reserved. |
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11 | |
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12 | Redistribution and use in source and binary forms, with or without modification, |
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13 | are permitted provided that the following conditions are met: |
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14 | |
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15 | * Redistributions of source code must retain the above copyright notice, this list |
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16 | of conditions and the following disclaimer. |
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17 | |
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18 | * Redistributions in binary form must reproduce the above copyright notice, this |
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19 | list of conditions and the following disclaimer in the documentation and/or other |
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20 | materials provided with the distribution. |
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21 | |
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22 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND |
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23 | CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, |
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24 | INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
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25 | MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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26 | DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR |
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27 | CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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28 | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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29 | NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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30 | LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
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31 | CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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32 | STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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33 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
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34 | ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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35 | |
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36 | */ |
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37 | |
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38 | #include "u8g2.h" |
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39 | |
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40 | #define MY_BORDER_SIZE 1 |
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41 | |
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42 | |
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43 | /* |
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44 | Draw a string at x,y |
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45 | Center string within w (left adjust if w < pixel len of s) |
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46 | |
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47 | Side effects: |
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48 | u8g2_SetFontDirection(u8g2, 0); |
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49 | u8g2_SetFontPosBaseline(u8g2); |
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50 | |
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51 | */ |
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52 | void u8g2_DrawUTF8Line(u8g2_t *u8g2, u8g2_uint_t x, u8g2_uint_t y, u8g2_uint_t w, const char *s, uint8_t border_size, uint8_t is_invert) |
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53 | { |
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54 | u8g2_uint_t d, str_width; |
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55 | u8g2_uint_t fx, fy, fw, fh; |
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56 | |
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57 | /* only horizontal strings are supported, so force this here */ |
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58 | u8g2_SetFontDirection(u8g2, 0); |
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59 | |
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60 | /* revert y position back to baseline ref */ |
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61 | y += u8g2->font_calc_vref(u8g2); |
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62 | |
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63 | /* calculate the width of the string in pixel */ |
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64 | str_width = u8g2_GetUTF8Width(u8g2, s); |
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65 | |
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66 | /* calculate delta d within the box */ |
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67 | d = 0; |
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68 | if ( str_width < w ) |
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69 | { |
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70 | d = w; |
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71 | d -=str_width; |
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72 | d /= 2; |
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73 | } |
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74 | else |
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75 | { |
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76 | w = str_width; |
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77 | } |
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78 | |
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79 | /* caluclate text box */ |
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80 | fx = x; |
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81 | fy = y - u8g2_GetAscent(u8g2) ; |
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82 | fw = w; |
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83 | fh = u8g2_GetAscent(u8g2) - u8g2_GetDescent(u8g2) ; |
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84 | |
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85 | /* draw the box, if inverted */ |
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86 | u8g2_SetDrawColor(u8g2, 1); |
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87 | if ( is_invert ) |
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88 | { |
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89 | u8g2_DrawBox(u8g2, fx, fy, fw, fh); |
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90 | } |
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91 | |
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92 | /* draw the frame */ |
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93 | while( border_size > 0 ) |
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94 | { |
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95 | fx--; |
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96 | fy--; |
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97 | fw +=2; |
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98 | fh +=2; |
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99 | u8g2_DrawFrame(u8g2, fx, fy, fw, fh ); |
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100 | border_size--; |
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101 | } |
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102 | |
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103 | if ( is_invert ) |
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104 | { |
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105 | u8g2_SetDrawColor(u8g2, 0); |
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106 | } |
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107 | else |
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108 | { |
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109 | u8g2_SetDrawColor(u8g2, 1); |
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110 | } |
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111 | |
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112 | /* draw the text */ |
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113 | u8g2_DrawUTF8(u8g2, x+d, y, s); |
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114 | |
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115 | /* revert draw color */ |
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116 | u8g2_SetDrawColor(u8g2, 1); |
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117 | |
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118 | } |
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119 | |
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120 | |
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121 | /* |
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122 | draw several lines at position x,y. |
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123 | lines are stored in s and must be separated with '\n'. |
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124 | lines can be centered with respect to "w" |
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125 | if s == NULL nothing is drawn and 0 is returned |
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126 | returns the number of lines in s multiplied with line_height |
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127 | */ |
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128 | u8g2_uint_t u8g2_DrawUTF8Lines(u8g2_t *u8g2, u8g2_uint_t x, u8g2_uint_t y, u8g2_uint_t w, u8g2_uint_t line_height, const char *s) |
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129 | { |
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130 | uint8_t i; |
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131 | uint8_t cnt; |
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132 | u8g2_uint_t yy = 0; |
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133 | cnt = u8x8_GetStringLineCnt(s); |
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134 | //printf("str=%s\n", s); |
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135 | //printf("cnt=%d, y=%d, line_height=%d\n", cnt, y, line_height); |
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136 | for( i = 0; i < cnt; i++ ) |
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137 | { |
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138 | //printf(" i=%d, y=%d, line_height=%d\n", i, y, line_height); |
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139 | u8g2_DrawUTF8Line(u8g2, x, y, w, u8x8_GetStringLineStart(i, s), 0, 0); |
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140 | y+=line_height; |
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141 | yy+=line_height; |
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142 | } |
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143 | return yy; |
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144 | } |
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145 | |
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146 | /* |
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147 | selection list with string line |
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148 | returns line height |
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149 | */ |
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150 | static u8g2_uint_t u8g2_draw_selection_list_line(u8g2_t *u8g2, u8sl_t *u8sl, u8g2_uint_t y, uint8_t idx, const char *s) U8G2_NOINLINE; |
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151 | static u8g2_uint_t u8g2_draw_selection_list_line(u8g2_t *u8g2, u8sl_t *u8sl, u8g2_uint_t y, uint8_t idx, const char *s) |
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152 | { |
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153 | u8g2_uint_t yy; |
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154 | uint8_t border_size = 0; |
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155 | uint8_t is_invert = 0; |
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156 | |
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157 | u8g2_uint_t line_height = u8g2_GetAscent(u8g2) - u8g2_GetDescent(u8g2)+MY_BORDER_SIZE; |
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158 | |
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159 | /* calculate offset from display upper border */ |
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160 | yy = idx; |
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161 | yy -= u8sl->first_pos; |
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162 | yy *= line_height; |
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163 | yy += y; |
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164 | |
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165 | /* check whether this is the current cursor line */ |
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166 | if ( idx == u8sl->current_pos ) |
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167 | { |
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168 | border_size = MY_BORDER_SIZE; |
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169 | is_invert = 1; |
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170 | } |
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171 | |
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172 | /* get the line from the array */ |
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173 | s = u8x8_GetStringLineStart(idx, s); |
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174 | |
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175 | /* draw the line */ |
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176 | if ( s == NULL ) |
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177 | s = ""; |
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178 | u8g2_DrawUTF8Line(u8g2, MY_BORDER_SIZE, y, u8g2_GetDisplayWidth(u8g2)-2*MY_BORDER_SIZE, s, border_size, is_invert); |
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179 | return line_height; |
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180 | } |
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181 | |
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182 | void u8g2_DrawSelectionList(u8g2_t *u8g2, u8sl_t *u8sl, u8g2_uint_t y, const char *s) |
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183 | { |
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184 | uint8_t i; |
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185 | for( i = 0; i < u8sl->visible; i++ ) |
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186 | { |
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187 | y += u8g2_draw_selection_list_line(u8g2, u8sl, y, i+u8sl->first_pos, s); |
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188 | } |
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189 | } |
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190 | |
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191 | |
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192 | /* |
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193 | title: NULL for no title, valid str for title line. Can contain mutliple lines, separated by '\n' |
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194 | start_pos: default position for the cursor, first line is 1. |
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195 | sl: string list (list of strings separated by \n) |
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196 | returns 0 if user has pressed the home key |
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197 | returns the selected line if user has pressed the select key |
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198 | side effects: |
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199 | u8g2_SetFontDirection(u8g2, 0); |
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200 | u8g2_SetFontPosBaseline(u8g2); |
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201 | |
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202 | */ |
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203 | uint8_t u8g2_UserInterfaceSelectionList(u8g2_t *u8g2, const char *title, uint8_t start_pos, const char *sl) |
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204 | { |
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205 | u8sl_t u8sl; |
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206 | u8g2_uint_t yy; |
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207 | |
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208 | uint8_t event; |
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209 | |
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210 | u8g2_uint_t line_height = u8g2_GetAscent(u8g2) - u8g2_GetDescent(u8g2)+MY_BORDER_SIZE; |
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211 | |
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212 | uint8_t title_lines = u8x8_GetStringLineCnt(title); |
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213 | uint8_t display_lines; |
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214 | |
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215 | |
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216 | if ( start_pos > 0 ) /* issue 112 */ |
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217 | start_pos--; /* issue 112 */ |
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218 | |
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219 | |
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220 | if ( title_lines > 0 ) |
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221 | { |
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222 | display_lines = (u8g2_GetDisplayHeight(u8g2)-3) / line_height; |
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223 | u8sl.visible = display_lines; |
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224 | u8sl.visible -= title_lines; |
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225 | } |
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226 | else |
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227 | { |
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228 | display_lines = u8g2_GetDisplayHeight(u8g2) / line_height; |
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229 | u8sl.visible = display_lines; |
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230 | } |
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231 | |
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232 | u8sl.total = u8x8_GetStringLineCnt(sl); |
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233 | u8sl.first_pos = 0; |
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234 | u8sl.current_pos = start_pos; |
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235 | |
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236 | if ( u8sl.current_pos >= u8sl.total ) |
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237 | u8sl.current_pos = u8sl.total-1; |
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238 | if ( u8sl.first_pos+u8sl.visible <= u8sl.current_pos ) |
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239 | u8sl.first_pos = u8sl.current_pos-u8sl.visible+1; |
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240 | |
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241 | u8g2_SetFontPosBaseline(u8g2); |
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242 | |
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243 | for(;;) |
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244 | { |
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245 | u8g2_FirstPage(u8g2); |
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246 | do |
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247 | { |
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248 | yy = u8g2_GetAscent(u8g2); |
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249 | if ( title_lines > 0 ) |
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250 | { |
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251 | yy += u8g2_DrawUTF8Lines(u8g2, 0, yy, u8g2_GetDisplayWidth(u8g2), line_height, title); |
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252 | |
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253 | u8g2_DrawHLine(u8g2, 0, yy-line_height- u8g2_GetDescent(u8g2) + 1, u8g2_GetDisplayWidth(u8g2)); |
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254 | |
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255 | yy += 3; |
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256 | } |
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257 | u8g2_DrawSelectionList(u8g2, &u8sl, yy, sl); |
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258 | } while( u8g2_NextPage(u8g2) ); |
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259 | |
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260 | #ifdef U8G2_REF_MAN_PIC |
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261 | return 0; |
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262 | #endif |
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263 | |
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264 | |
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265 | for(;;) |
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266 | { |
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267 | event = u8x8_GetMenuEvent(u8g2_GetU8x8(u8g2)); |
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268 | if ( event == U8X8_MSG_GPIO_MENU_SELECT ) |
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269 | return u8sl.current_pos+1; /* +1, issue 112 */ |
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270 | else if ( event == U8X8_MSG_GPIO_MENU_HOME ) |
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271 | return 0; /* issue 112: return 0 instead of start_pos */ |
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272 | else if ( event == U8X8_MSG_GPIO_MENU_NEXT || event == U8X8_MSG_GPIO_MENU_DOWN ) |
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273 | { |
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274 | u8sl_Next(&u8sl); |
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275 | break; |
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276 | } |
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277 | else if ( event == U8X8_MSG_GPIO_MENU_PREV || event == U8X8_MSG_GPIO_MENU_UP ) |
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278 | { |
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279 | u8sl_Prev(&u8sl); |
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280 | break; |
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281 | } |
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282 | } |
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283 | } |
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284 | } |