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- /*
- u8g2_message.c
-
- Universal 8bit Graphics Library (https://github.com/olikraus/u8g2/)
- Copyright (c) 2016, olikraus@gmail.com
- All rights reserved.
- Redistribution and use in source and binary forms, with or without modification,
- are permitted provided that the following conditions are met:
- * Redistributions of source code must retain the above copyright notice, this list
- of conditions and the following disclaimer.
-
- * Redistributions in binary form must reproduce the above copyright notice, this
- list of conditions and the following disclaimer in the documentation and/or other
- materials provided with the distribution.
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
- CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
- INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
- CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
- */
- #include "u8g2.h"
- #define SPACE_BETWEEN_BUTTONS_IN_PIXEL 6
- #define SPACE_BETWEEN_TEXT_AND_BUTTONS_IN_PIXEL 3
- uint8_t u8g2_draw_button_line(u8g2_t *u8g2, u8g2_uint_t y, u8g2_uint_t w, uint8_t cursor, const char *s)
- {
- u8g2_uint_t button_line_width;
-
- uint8_t i;
- uint8_t cnt;
- uint8_t is_invert;
-
- u8g2_uint_t d;
- u8g2_uint_t x;
-
- cnt = u8x8_GetStringLineCnt(s);
-
-
- /* calculate the width of the button line */
- button_line_width = 0;
- for( i = 0; i < cnt; i++ )
- {
- button_line_width += u8g2_GetUTF8Width(u8g2, u8x8_GetStringLineStart(i, s));
- }
- button_line_width += (cnt-1)*SPACE_BETWEEN_BUTTONS_IN_PIXEL; /* add some space between the buttons */
-
- /* calculate the left offset */
- d = 0;
- if ( button_line_width < w )
- {
- d = w;
- d -= button_line_width;
- d /= 2;
- }
-
- /* draw the buttons */
- x = d;
- for( i = 0; i < cnt; i++ )
- {
- is_invert = 0;
- if ( i == cursor )
- is_invert = 1;
- u8g2_DrawUTF8Line(u8g2, x, y, 0, u8x8_GetStringLineStart(i, s), 1, is_invert);
- x += u8g2_GetUTF8Width(u8g2, u8x8_GetStringLineStart(i, s));
- x += SPACE_BETWEEN_BUTTONS_IN_PIXEL;
- }
-
- /* return the number of buttons */
- return cnt;
- }
- /*
- title1: Multiple lines,separated by '\n'
- title2: A single line/string which is terminated by '\0' or '\n' . "title2" accepts the return value from u8x8_GetStringLineStart()
- title3: Multiple lines,separated by '\n'
- buttons: one more more buttons separated by '\n' and terminated with '\0'
- side effects:
- u8g2_SetFontDirection(u8g2, 0);
- u8g2_SetFontPosBaseline(u8g2);
- */
- uint8_t u8g2_UserInterfaceMessage(u8g2_t *u8g2, const char *title1, const char *title2, const char *title3, const char *buttons)
- {
- uint8_t height;
- uint8_t line_height;
- u8g2_uint_t pixel_height;
- u8g2_uint_t y, yy;
-
- uint8_t cursor = 0;
- uint8_t button_cnt;
- uint8_t event;
-
- /* only horizontal strings are supported, so force this here */
- u8g2_SetFontDirection(u8g2, 0);
- /* force baseline position */
- u8g2_SetFontPosBaseline(u8g2);
-
-
- /* calculate line height */
- line_height = u8g2_GetAscent(u8g2);
- line_height -= u8g2_GetDescent(u8g2);
- /* calculate overall height of the message box in lines*/
- height = 1; /* button line */
- height += u8x8_GetStringLineCnt(title1);
- if ( title2 != NULL )
- height++;
- height += u8x8_GetStringLineCnt(title3);
-
- /* calculate the height in pixel */
- pixel_height = height;
- pixel_height *= line_height;
-
- /* ... and add the space between the text and the buttons */
- pixel_height +=SPACE_BETWEEN_TEXT_AND_BUTTONS_IN_PIXEL;
-
- /* calculate offset from top */
- y = 0;
- if ( pixel_height < u8g2_GetDisplayHeight(u8g2) )
- {
- y = u8g2_GetDisplayHeight(u8g2);
- y -= pixel_height;
- y /= 2;
- }
- y += u8g2_GetAscent(u8g2);
-
- for(;;)
- {
- u8g2_FirstPage(u8g2);
- do
- {
- yy = y;
- /* draw message box */
-
- yy += u8g2_DrawUTF8Lines(u8g2, 0, yy, u8g2_GetDisplayWidth(u8g2), line_height, title1);
- if ( title2 != NULL )
- {
- u8g2_DrawUTF8Line(u8g2, 0, yy, u8g2_GetDisplayWidth(u8g2), title2, 0, 0);
- yy+=line_height;
- }
- yy += u8g2_DrawUTF8Lines(u8g2, 0, yy, u8g2_GetDisplayWidth(u8g2), line_height, title3);
- yy += SPACE_BETWEEN_TEXT_AND_BUTTONS_IN_PIXEL;
- button_cnt = u8g2_draw_button_line(u8g2, yy, u8g2_GetDisplayWidth(u8g2), cursor, buttons);
-
- } while( u8g2_NextPage(u8g2) );
- #ifdef U8G2_REF_MAN_PIC
- return 0;
- #endif
-
- for(;;)
- {
- event = u8x8_GetMenuEvent(u8g2_GetU8x8(u8g2));
- if ( event == U8X8_MSG_GPIO_MENU_SELECT )
- return cursor+1;
- else if ( event == U8X8_MSG_GPIO_MENU_HOME )
- return 0;
- else if ( event == U8X8_MSG_GPIO_MENU_NEXT || event == U8X8_MSG_GPIO_MENU_DOWN )
- {
- cursor++;
- if ( cursor >= button_cnt )
- cursor = 0;
- break;
- }
- else if ( event == U8X8_MSG_GPIO_MENU_PREV || event == U8X8_MSG_GPIO_MENU_UP )
- {
- if ( cursor == 0 )
- cursor = button_cnt;
- cursor--;
- break;
- }
- }
- }
- /* never reached */
- //return 0;
- }
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