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123 lines
3.5 KiB
123 lines
3.5 KiB
/* |
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u8x8_input_value.c |
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Universal 8bit Graphics Library (https://github.com/olikraus/u8g2/) |
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Copyright (c) 2016, olikraus@gmail.com |
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All rights reserved. |
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Redistribution and use in source and binary forms, with or without modification, |
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are permitted provided that the following conditions are met: |
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* Redistributions of source code must retain the above copyright notice, this list |
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of conditions and the following disclaimer. |
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* Redistributions in binary form must reproduce the above copyright notice, this |
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list of conditions and the following disclaimer in the documentation and/or other |
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materials provided with the distribution. |
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND |
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CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, |
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
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MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR |
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
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ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#include "u8x8.h" |
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/* |
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return: |
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0: value is not changed (HOME/Break Button pressed) |
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1: value has been updated |
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*/ |
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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) |
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{ |
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uint8_t height; |
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uint8_t y; |
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uint8_t width; |
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uint8_t x; |
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uint8_t local_value = *value; |
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uint8_t r; |
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uint8_t event; |
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/* calculate overall height of the input value box */ |
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height = 1; /* button line */ |
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height += u8x8_GetStringLineCnt(title); |
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/* calculate offset from top */ |
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y = 0; |
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if ( height < u8x8_GetRows(u8x8) ) |
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{ |
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y = u8x8_GetRows(u8x8); |
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y -= height; |
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y /= 2; |
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} |
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/* calculate offset from left for the label */ |
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x = 0; |
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width = u8x8_GetUTF8Len(u8x8, pre); |
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width += digits; |
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width += u8x8_GetUTF8Len(u8x8, post); |
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if ( width < u8x8_GetCols(u8x8) ) |
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{ |
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x = u8x8_GetCols(u8x8); |
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x -= width; |
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x /= 2; |
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} |
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/* render */ |
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u8x8_ClearDisplay(u8x8); /* required, because not everything is filled */ |
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u8x8_SetInverseFont(u8x8, 0); |
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y += u8x8_DrawUTF8Lines(u8x8, 0, y, u8x8_GetCols(u8x8), title); |
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x += u8x8_DrawUTF8(u8x8, x, y, pre); |
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u8x8_DrawUTF8(u8x8, x+digits, y, post); |
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u8x8_SetInverseFont(u8x8, 1); |
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/* event loop */ |
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u8x8_DrawUTF8(u8x8, x, y, u8x8_u8toa(local_value, digits)); |
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for(;;) |
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{ |
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event = u8x8_GetMenuEvent(u8x8); |
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if ( event == U8X8_MSG_GPIO_MENU_SELECT ) |
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{ |
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*value = local_value; |
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r = 1; |
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break; |
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} |
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else if ( event == U8X8_MSG_GPIO_MENU_HOME ) |
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{ |
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r = 0; |
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break; |
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} |
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else if ( event == U8X8_MSG_GPIO_MENU_NEXT || event == U8X8_MSG_GPIO_MENU_UP ) |
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{ |
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if ( local_value >= hi ) |
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local_value = lo; |
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else |
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local_value++; |
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u8x8_DrawUTF8(u8x8, x, y, u8x8_u8toa(local_value, digits)); |
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} |
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else if ( event == U8X8_MSG_GPIO_MENU_PREV || event == U8X8_MSG_GPIO_MENU_DOWN ) |
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{ |
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if ( local_value <= lo ) |
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local_value = hi; |
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else |
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local_value--; |
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u8x8_DrawUTF8(u8x8, x, y, u8x8_u8toa(local_value, digits)); |
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} |
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} |
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u8x8_SetInverseFont(u8x8, 0); |
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return r; |
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}
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