comparison: components/u8g2/csrc/u8x8_message.c
components/u8g2/csrc/u8x8_message.c
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- 88d965579617
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| -1:000000000000 | 0:88d965579617 |
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| 1 /* | |
| 2 | |
| 3 u8x8_message.c | |
| 4 | |
| 5 Universal 8bit Graphics Library (https://github.com/olikraus/u8g2/) | |
| 6 | |
| 7 Copyright (c) 2016, olikraus@gmail.com | |
| 8 All rights reserved. | |
| 9 | |
| 10 Redistribution and use in source and binary forms, with or without modification, | |
| 11 are permitted provided that the following conditions are met: | |
| 12 | |
| 13 * Redistributions of source code must retain the above copyright notice, this list | |
| 14 of conditions and the following disclaimer. | |
| 15 | |
| 16 * Redistributions in binary form must reproduce the above copyright notice, this | |
| 17 list of conditions and the following disclaimer in the documentation and/or other | |
| 18 materials provided with the distribution. | |
| 19 | |
| 20 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND | |
| 21 CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, | |
| 22 INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
| 23 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
| 24 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR | |
| 25 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 26 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
| 27 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| 28 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | |
| 29 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
| 30 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 31 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF | |
| 32 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 33 | |
| 34 */ | |
| 35 | |
| 36 #include "u8x8.h" | |
| 37 | |
| 38 uint8_t u8x8_draw_button_line(u8x8_t *u8x8, uint8_t y, uint8_t w, uint8_t cursor, const char *s) | |
| 39 { | |
| 40 uint8_t i; | |
| 41 uint8_t cnt; | |
| 42 uint8_t total; | |
| 43 uint8_t d; | |
| 44 uint8_t x; | |
| 45 cnt = u8x8_GetStringLineCnt(s); | |
| 46 | |
| 47 /* calculate the width of the button */ | |
| 48 total = 0; | |
| 49 for( i = 0; i < cnt; i++ ) | |
| 50 { | |
| 51 total += u8x8_GetUTF8Len(u8x8, u8x8_GetStringLineStart(i, s)); | |
| 52 } | |
| 53 total += (cnt-1); /* had one space between the buttons */ | |
| 54 | |
| 55 /* calculate the left offset */ | |
| 56 d = 0; | |
| 57 if ( total < w ) | |
| 58 { | |
| 59 d = w; | |
| 60 d -= total; | |
| 61 d /= 2; | |
| 62 } | |
| 63 | |
| 64 /* draw the buttons */ | |
| 65 x = d; | |
| 66 u8x8_SetInverseFont(u8x8, 0); | |
| 67 for( i = 0; i < cnt; i++ ) | |
| 68 { | |
| 69 if ( i == cursor ) | |
| 70 u8x8_SetInverseFont(u8x8, 1); | |
| 71 | |
| 72 x+=u8x8_DrawUTF8(u8x8, x, y, u8x8_GetStringLineStart(i, s)); | |
| 73 u8x8_SetInverseFont(u8x8, 0); | |
| 74 x+=u8x8_DrawUTF8(u8x8, x, y, " "); | |
| 75 } | |
| 76 | |
| 77 /* return the number of buttons */ | |
| 78 return cnt; | |
| 79 } | |
| 80 | |
| 81 /* | |
| 82 title1: Multiple lines,separated by '\n' | |
| 83 title2: A single line/string which is terminated by '\0' or '\n' . "title2" accepts the return value from u8x8_GetStringLineStart() | |
| 84 title3: Multiple lines,separated by '\n' | |
| 85 buttons: one more more buttons separated by '\n' and terminated with '\0' | |
| 86 */ | |
| 87 | |
| 88 uint8_t u8x8_UserInterfaceMessage(u8x8_t *u8x8, const char *title1, const char *title2, const char *title3, const char *buttons) | |
| 89 { | |
| 90 uint8_t height; | |
| 91 uint8_t y; | |
| 92 uint8_t cursor = 0; | |
| 93 uint8_t button_cnt; | |
| 94 uint8_t event; | |
| 95 | |
| 96 u8x8_SetInverseFont(u8x8, 0); | |
| 97 | |
| 98 /* calculate overall height of the message box */ | |
| 99 height = 1; /* button line */ | |
| 100 height += u8x8_GetStringLineCnt(title1); | |
| 101 if ( title2 != NULL ) | |
| 102 height ++; | |
| 103 height += u8x8_GetStringLineCnt(title3); | |
| 104 | |
| 105 /* calculate offset from top */ | |
| 106 y = 0; | |
| 107 if ( height < u8x8_GetRows(u8x8) ) | |
| 108 { | |
| 109 y = u8x8_GetRows(u8x8); | |
| 110 y -= height; | |
| 111 y /= 2; | |
| 112 } | |
| 113 | |
| 114 /* draw message box */ | |
| 115 | |
| 116 u8x8_ClearDisplay(u8x8); /* required, because not everything is filled */ | |
| 117 | |
| 118 y += u8x8_DrawUTF8Lines(u8x8, 0, y, u8x8_GetCols(u8x8), title1); | |
| 119 if ( title2 != NULL ) | |
| 120 { | |
| 121 u8x8_DrawUTF8Line(u8x8, 0, y, u8x8_GetCols(u8x8), title2); | |
| 122 y++; | |
| 123 } | |
| 124 y += u8x8_DrawUTF8Lines(u8x8, 0, y, u8x8_GetCols(u8x8), title3); | |
| 125 | |
| 126 button_cnt = u8x8_draw_button_line(u8x8, y, u8x8_GetCols(u8x8), cursor, buttons); | |
| 127 | |
| 128 for(;;) | |
| 129 { | |
| 130 event = u8x8_GetMenuEvent(u8x8); | |
| 131 if ( event == U8X8_MSG_GPIO_MENU_SELECT ) | |
| 132 return cursor+1; | |
| 133 else if ( event == U8X8_MSG_GPIO_MENU_HOME ) | |
| 134 break; | |
| 135 else if ( event == U8X8_MSG_GPIO_MENU_NEXT || event == U8X8_MSG_GPIO_MENU_UP ) | |
| 136 { | |
| 137 cursor++; | |
| 138 if ( cursor >= button_cnt ) | |
| 139 cursor = 0; | |
| 140 u8x8_draw_button_line(u8x8, y, u8x8_GetCols(u8x8), cursor, buttons); | |
| 141 } | |
| 142 else if ( event == U8X8_MSG_GPIO_MENU_PREV || event == U8X8_MSG_GPIO_MENU_DOWN ) | |
| 143 { | |
| 144 if ( cursor == 0 ) | |
| 145 cursor = button_cnt; | |
| 146 cursor--; | |
| 147 u8x8_draw_button_line(u8x8, y, u8x8_GetCols(u8x8), cursor, buttons); | |
| 148 } | |
| 149 } | |
| 150 return 0; | |
| 151 } | |
| 152 |
