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1 /* |
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2 |
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3 u8g2_message.c |
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4 |
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5 Universal 8bit Graphics Library (https://github.com/olikraus/u8g2/) |
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6 |
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7 Copyright (c) 2016, olikraus@gmail.com |
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8 All rights reserved. |
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9 |
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10 Redistribution and use in source and binary forms, with or without modification, |
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11 are permitted provided that the following conditions are met: |
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12 |
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13 * Redistributions of source code must retain the above copyright notice, this list |
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14 of conditions and the following disclaimer. |
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15 |
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16 * Redistributions in binary form must reproduce the above copyright notice, this |
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17 list of conditions and the following disclaimer in the documentation and/or other |
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18 materials provided with the distribution. |
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19 |
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20 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND |
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21 CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, |
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22 INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
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23 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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24 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR |
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25 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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26 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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27 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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28 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
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29 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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30 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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31 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
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32 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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33 |
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34 */ |
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35 |
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36 #include "u8g2.h" |
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37 |
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38 #define SPACE_BETWEEN_BUTTONS_IN_PIXEL 6 |
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39 #define SPACE_BETWEEN_TEXT_AND_BUTTONS_IN_PIXEL 3 |
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40 |
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41 uint8_t u8g2_draw_button_line(u8g2_t *u8g2, u8g2_uint_t y, u8g2_uint_t w, uint8_t cursor, const char *s) |
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42 { |
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43 u8g2_uint_t button_line_width; |
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44 |
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45 uint8_t i; |
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46 uint8_t cnt; |
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47 uint8_t is_invert; |
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48 |
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49 u8g2_uint_t d; |
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50 u8g2_uint_t x; |
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51 |
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52 cnt = u8x8_GetStringLineCnt(s); |
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53 |
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54 |
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55 /* calculate the width of the button line */ |
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56 button_line_width = 0; |
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57 for( i = 0; i < cnt; i++ ) |
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58 { |
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59 button_line_width += u8g2_GetUTF8Width(u8g2, u8x8_GetStringLineStart(i, s)); |
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60 } |
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61 button_line_width += (cnt-1)*SPACE_BETWEEN_BUTTONS_IN_PIXEL; /* add some space between the buttons */ |
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62 |
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63 /* calculate the left offset */ |
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64 d = 0; |
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65 if ( button_line_width < w ) |
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66 { |
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67 d = w; |
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68 d -= button_line_width; |
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69 d /= 2; |
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70 } |
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71 |
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72 /* draw the buttons */ |
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73 x = d; |
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74 for( i = 0; i < cnt; i++ ) |
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75 { |
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76 is_invert = 0; |
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77 if ( i == cursor ) |
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78 is_invert = 1; |
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79 |
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80 u8g2_DrawUTF8Line(u8g2, x, y, 0, u8x8_GetStringLineStart(i, s), 1, is_invert); |
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81 x += u8g2_GetUTF8Width(u8g2, u8x8_GetStringLineStart(i, s)); |
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82 x += SPACE_BETWEEN_BUTTONS_IN_PIXEL; |
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83 } |
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84 |
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85 /* return the number of buttons */ |
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86 return cnt; |
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87 } |
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88 |
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89 /* |
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90 title1: Multiple lines,separated by '\n' |
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91 title2: A single line/string which is terminated by '\0' or '\n' . "title2" accepts the return value from u8x8_GetStringLineStart() |
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92 title3: Multiple lines,separated by '\n' |
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93 buttons: one more more buttons separated by '\n' and terminated with '\0' |
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94 side effects: |
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95 u8g2_SetFontDirection(u8g2, 0); |
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96 u8g2_SetFontPosBaseline(u8g2); |
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97 */ |
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98 |
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99 uint8_t u8g2_UserInterfaceMessage(u8g2_t *u8g2, const char *title1, const char *title2, const char *title3, const char *buttons) |
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100 { |
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101 uint8_t height; |
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102 uint8_t line_height; |
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103 u8g2_uint_t pixel_height; |
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104 u8g2_uint_t y, yy; |
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105 |
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106 uint8_t cursor = 0; |
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107 uint8_t button_cnt; |
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108 uint8_t event; |
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109 |
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110 /* only horizontal strings are supported, so force this here */ |
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111 u8g2_SetFontDirection(u8g2, 0); |
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112 |
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113 /* force baseline position */ |
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114 u8g2_SetFontPosBaseline(u8g2); |
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115 |
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116 |
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117 /* calculate line height */ |
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118 line_height = u8g2_GetAscent(u8g2); |
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119 line_height -= u8g2_GetDescent(u8g2); |
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120 |
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121 /* calculate overall height of the message box in lines*/ |
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122 height = 1; /* button line */ |
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123 height += u8x8_GetStringLineCnt(title1); |
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124 if ( title2 != NULL ) |
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125 height++; |
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126 height += u8x8_GetStringLineCnt(title3); |
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127 |
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128 /* calculate the height in pixel */ |
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129 pixel_height = height; |
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130 pixel_height *= line_height; |
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131 |
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132 /* ... and add the space between the text and the buttons */ |
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133 pixel_height +=SPACE_BETWEEN_TEXT_AND_BUTTONS_IN_PIXEL; |
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134 |
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135 /* calculate offset from top */ |
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136 y = 0; |
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137 if ( pixel_height < u8g2_GetDisplayHeight(u8g2) ) |
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138 { |
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139 y = u8g2_GetDisplayHeight(u8g2); |
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140 y -= pixel_height; |
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141 y /= 2; |
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142 } |
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143 y += u8g2_GetAscent(u8g2); |
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144 |
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145 |
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146 for(;;) |
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147 { |
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148 u8g2_FirstPage(u8g2); |
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149 do |
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150 { |
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151 yy = y; |
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152 /* draw message box */ |
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153 |
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154 yy += u8g2_DrawUTF8Lines(u8g2, 0, yy, u8g2_GetDisplayWidth(u8g2), line_height, title1); |
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155 if ( title2 != NULL ) |
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156 { |
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157 u8g2_DrawUTF8Line(u8g2, 0, yy, u8g2_GetDisplayWidth(u8g2), title2, 0, 0); |
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158 yy+=line_height; |
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159 } |
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160 yy += u8g2_DrawUTF8Lines(u8g2, 0, yy, u8g2_GetDisplayWidth(u8g2), line_height, title3); |
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161 yy += SPACE_BETWEEN_TEXT_AND_BUTTONS_IN_PIXEL; |
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162 |
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163 button_cnt = u8g2_draw_button_line(u8g2, yy, u8g2_GetDisplayWidth(u8g2), cursor, buttons); |
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164 |
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165 } while( u8g2_NextPage(u8g2) ); |
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166 |
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167 #ifdef U8G2_REF_MAN_PIC |
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168 return 0; |
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169 #endif |
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170 |
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171 for(;;) |
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172 { |
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173 event = u8x8_GetMenuEvent(u8g2_GetU8x8(u8g2)); |
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174 if ( event == U8X8_MSG_GPIO_MENU_SELECT ) |
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175 return cursor+1; |
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176 else if ( event == U8X8_MSG_GPIO_MENU_HOME ) |
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177 return 0; |
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178 else if ( event == U8X8_MSG_GPIO_MENU_NEXT || event == U8X8_MSG_GPIO_MENU_DOWN ) |
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179 { |
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180 cursor++; |
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181 if ( cursor >= button_cnt ) |
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182 cursor = 0; |
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183 break; |
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184 } |
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185 else if ( event == U8X8_MSG_GPIO_MENU_PREV || event == U8X8_MSG_GPIO_MENU_UP ) |
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186 { |
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187 if ( cursor == 0 ) |
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188 cursor = button_cnt; |
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189 cursor--; |
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190 break; |
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191 } |
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192 } |
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193 } |
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194 /* never reached */ |
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195 //return 0; |
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196 } |
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197 |