|
1 /* |
|
2 |
|
3 u8x8_input_value.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 /* |
|
39 return: |
|
40 0: value is not changed (HOME/Break Button pressed) |
|
41 1: value has been updated |
|
42 */ |
|
43 |
|
44 uint8_t u8x8_UserInterfaceInputValue(u8x8_t *u8x8, const char *title, const char *pre, uint8_t *value, uint8_t lo, uint8_t hi, uint8_t digits, const char *post) |
|
45 { |
|
46 uint8_t height; |
|
47 uint8_t y; |
|
48 uint8_t width; |
|
49 uint8_t x; |
|
50 uint8_t local_value = *value; |
|
51 uint8_t r; |
|
52 uint8_t event; |
|
53 |
|
54 /* calculate overall height of the input value box */ |
|
55 height = 1; /* button line */ |
|
56 height += u8x8_GetStringLineCnt(title); |
|
57 |
|
58 /* calculate offset from top */ |
|
59 y = 0; |
|
60 if ( height < u8x8_GetRows(u8x8) ) |
|
61 { |
|
62 y = u8x8_GetRows(u8x8); |
|
63 y -= height; |
|
64 y /= 2; |
|
65 } |
|
66 |
|
67 /* calculate offset from left for the label */ |
|
68 x = 0; |
|
69 width = u8x8_GetUTF8Len(u8x8, pre); |
|
70 width += digits; |
|
71 width += u8x8_GetUTF8Len(u8x8, post); |
|
72 if ( width < u8x8_GetCols(u8x8) ) |
|
73 { |
|
74 x = u8x8_GetCols(u8x8); |
|
75 x -= width; |
|
76 x /= 2; |
|
77 } |
|
78 |
|
79 /* render */ |
|
80 u8x8_ClearDisplay(u8x8); /* required, because not everything is filled */ |
|
81 u8x8_SetInverseFont(u8x8, 0); |
|
82 y += u8x8_DrawUTF8Lines(u8x8, 0, y, u8x8_GetCols(u8x8), title); |
|
83 x += u8x8_DrawUTF8(u8x8, x, y, pre); |
|
84 u8x8_DrawUTF8(u8x8, x+digits, y, post); |
|
85 u8x8_SetInverseFont(u8x8, 1); |
|
86 |
|
87 /* event loop */ |
|
88 u8x8_DrawUTF8(u8x8, x, y, u8x8_u8toa(local_value, digits)); |
|
89 for(;;) |
|
90 { |
|
91 event = u8x8_GetMenuEvent(u8x8); |
|
92 if ( event == U8X8_MSG_GPIO_MENU_SELECT ) |
|
93 { |
|
94 *value = local_value; |
|
95 r = 1; |
|
96 break; |
|
97 } |
|
98 else if ( event == U8X8_MSG_GPIO_MENU_HOME ) |
|
99 { |
|
100 r = 0; |
|
101 break; |
|
102 } |
|
103 else if ( event == U8X8_MSG_GPIO_MENU_NEXT || event == U8X8_MSG_GPIO_MENU_UP ) |
|
104 { |
|
105 if ( local_value >= hi ) |
|
106 local_value = lo; |
|
107 else |
|
108 local_value++; |
|
109 u8x8_DrawUTF8(u8x8, x, y, u8x8_u8toa(local_value, digits)); |
|
110 } |
|
111 else if ( event == U8X8_MSG_GPIO_MENU_PREV || event == U8X8_MSG_GPIO_MENU_DOWN ) |
|
112 { |
|
113 if ( local_value <= lo ) |
|
114 local_value = hi; |
|
115 else |
|
116 local_value--; |
|
117 u8x8_DrawUTF8(u8x8, x, y, u8x8_u8toa(local_value, digits)); |
|
118 } |
|
119 } |
|
120 |
|
121 u8x8_SetInverseFont(u8x8, 0); |
|
122 return r; |
|
123 } |