285 lines
7.5 KiB
C
285 lines
7.5 KiB
C
/*
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u8g2_selection_list.c
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selection list with scroll option
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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 "u8g2.h"
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#define MY_BORDER_SIZE 1
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/*
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Draw a string at x,y
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Center string within w (left adjust if w < pixel len of s)
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Side effects:
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u8g2_SetFontDirection(u8g2, 0);
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u8g2_SetFontPosBaseline(u8g2);
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*/
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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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{
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u8g2_uint_t d, str_width;
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u8g2_uint_t fx, fy, fw, fh;
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/* only horizontal strings are supported, so force this here */
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u8g2_SetFontDirection(u8g2, 0);
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/* revert y position back to baseline ref */
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y += u8g2->font_calc_vref(u8g2);
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/* calculate the width of the string in pixel */
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str_width = u8g2_GetUTF8Width(u8g2, s);
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/* calculate delta d within the box */
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d = 0;
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if ( str_width < w )
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{
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d = w;
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d -=str_width;
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d /= 2;
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}
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else
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{
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w = str_width;
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}
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/* caluclate text box */
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fx = x;
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fy = y - u8g2_GetAscent(u8g2) ;
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fw = w;
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fh = u8g2_GetAscent(u8g2) - u8g2_GetDescent(u8g2) ;
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/* draw the box, if inverted */
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u8g2_SetDrawColor(u8g2, 1);
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if ( is_invert )
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{
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u8g2_DrawBox(u8g2, fx, fy, fw, fh);
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}
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/* draw the frame */
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while( border_size > 0 )
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{
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fx--;
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fy--;
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fw +=2;
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fh +=2;
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u8g2_DrawFrame(u8g2, fx, fy, fw, fh );
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border_size--;
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}
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if ( is_invert )
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{
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u8g2_SetDrawColor(u8g2, 0);
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}
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else
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{
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u8g2_SetDrawColor(u8g2, 1);
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}
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/* draw the text */
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u8g2_DrawUTF8(u8g2, x+d, y, s);
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/* revert draw color */
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u8g2_SetDrawColor(u8g2, 1);
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}
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/*
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draw several lines at position x,y.
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lines are stored in s and must be separated with '\n'.
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lines can be centered with respect to "w"
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if s == NULL nothing is drawn and 0 is returned
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returns the number of lines in s multiplied with line_height
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*/
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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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{
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uint8_t i;
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uint8_t cnt;
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u8g2_uint_t yy = 0;
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cnt = u8x8_GetStringLineCnt(s);
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//printf("str=%s\n", s);
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//printf("cnt=%d, y=%d, line_height=%d\n", cnt, y, line_height);
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for( i = 0; i < cnt; i++ )
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{
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//printf(" i=%d, y=%d, line_height=%d\n", i, y, line_height);
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u8g2_DrawUTF8Line(u8g2, x, y, w, u8x8_GetStringLineStart(i, s), 0, 0);
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y+=line_height;
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yy+=line_height;
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}
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return yy;
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}
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/*
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selection list with string line
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returns line height
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*/
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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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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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{
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//u8g2_uint_t yy;
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uint8_t border_size = 0;
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uint8_t is_invert = 0;
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u8g2_uint_t line_height = u8g2_GetAscent(u8g2) - u8g2_GetDescent(u8g2)+MY_BORDER_SIZE;
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/* calculate offset from display upper border */
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//yy = idx;
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//yy -= u8sl->first_pos;
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//yy *= line_height;
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//yy += y;
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/* check whether this is the current cursor line */
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if ( idx == u8sl->current_pos )
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{
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border_size = MY_BORDER_SIZE;
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is_invert = 1;
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}
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/* get the line from the array */
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s = u8x8_GetStringLineStart(idx, s);
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/* draw the line */
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if ( s == NULL )
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s = "";
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u8g2_DrawUTF8Line(u8g2, MY_BORDER_SIZE, y, u8g2_GetDisplayWidth(u8g2)-2*MY_BORDER_SIZE, s, border_size, is_invert);
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return line_height;
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}
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void u8g2_DrawSelectionList(u8g2_t *u8g2, u8sl_t *u8sl, u8g2_uint_t y, const char *s)
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{
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uint8_t i;
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for( i = 0; i < u8sl->visible; i++ )
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{
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y += u8g2_draw_selection_list_line(u8g2, u8sl, y, i+u8sl->first_pos, s);
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}
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}
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/*
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title: NULL for no title, valid str for title line. Can contain mutliple lines, separated by '\n'
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start_pos: default position for the cursor, first line is 1.
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sl: string list (list of strings separated by \n)
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returns 0 if user has pressed the home key
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returns the selected line if user has pressed the select key
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side effects:
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u8g2_SetFontDirection(u8g2, 0);
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u8g2_SetFontPosBaseline(u8g2);
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*/
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uint8_t u8g2_UserInterfaceSelectionList(u8g2_t *u8g2, const char *title, uint8_t start_pos, const char *sl)
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{
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u8sl_t u8sl;
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u8g2_uint_t yy;
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uint8_t event;
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u8g2_uint_t line_height = u8g2_GetAscent(u8g2) - u8g2_GetDescent(u8g2)+MY_BORDER_SIZE;
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uint8_t title_lines = u8x8_GetStringLineCnt(title);
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uint8_t display_lines;
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if ( start_pos > 0 ) /* issue 112 */
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start_pos--; /* issue 112 */
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if ( title_lines > 0 )
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{
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display_lines = (u8g2_GetDisplayHeight(u8g2)-3) / line_height;
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u8sl.visible = display_lines;
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u8sl.visible -= title_lines;
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}
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else
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{
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display_lines = u8g2_GetDisplayHeight(u8g2) / line_height;
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u8sl.visible = display_lines;
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}
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u8sl.total = u8x8_GetStringLineCnt(sl);
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u8sl.first_pos = 0;
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u8sl.current_pos = start_pos;
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if ( u8sl.current_pos >= u8sl.total )
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u8sl.current_pos = u8sl.total-1;
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if ( u8sl.first_pos+u8sl.visible <= u8sl.current_pos )
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u8sl.first_pos = u8sl.current_pos-u8sl.visible+1;
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u8g2_SetFontPosBaseline(u8g2);
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for(;;)
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{
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u8g2_FirstPage(u8g2);
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do
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{
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yy = u8g2_GetAscent(u8g2);
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if ( title_lines > 0 )
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{
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yy += u8g2_DrawUTF8Lines(u8g2, 0, yy, u8g2_GetDisplayWidth(u8g2), line_height, title);
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u8g2_DrawHLine(u8g2, 0, yy-line_height- u8g2_GetDescent(u8g2) + 1, u8g2_GetDisplayWidth(u8g2));
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yy += 3;
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}
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u8g2_DrawSelectionList(u8g2, &u8sl, yy, sl);
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} while( u8g2_NextPage(u8g2) );
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#ifdef U8G2_REF_MAN_PIC
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return 0;
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#endif
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for(;;)
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{
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event = u8x8_GetMenuEvent(u8g2_GetU8x8(u8g2));
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if ( event == U8X8_MSG_GPIO_MENU_SELECT )
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return u8sl.current_pos+1; /* +1, issue 112 */
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else if ( event == U8X8_MSG_GPIO_MENU_HOME )
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return 0; /* issue 112: return 0 instead of start_pos */
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else if ( event == U8X8_MSG_GPIO_MENU_NEXT || event == U8X8_MSG_GPIO_MENU_DOWN )
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{
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u8sl_Next(&u8sl);
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break;
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}
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else if ( event == U8X8_MSG_GPIO_MENU_PREV || event == U8X8_MSG_GPIO_MENU_UP )
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{
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u8sl_Prev(&u8sl);
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break;
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}
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}
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}
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}
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