Hi,
I'm working on developing a menu and I reached the part where I want to scroll down/up the menu but I don't know how.
This is the code I'm working on:
#include <U8g2lib.h>
// constants ////////////////////////////////////////////////
// # lists settings
#define LIST_COUNT 8
#define LIST_PER_FRAME 5
#define LIST_Y_START_POINT 1
#define LIST_X_START_POINT 2
#define LIST_Y(_Y) (LIST_Y_START_POINT+(12*_Y))
// # selection settings
#define SELECT_WIDTH 65
#define SELECT_HEIGHT 11
#define SELECT_X_START_POINT 0
#define SELECT_Y_START_POINT 0
#define SELECT_Y(_Y) (SELECT_Y_START_POINT+(12*_Y))
// variables ////////////////////////////////////////////////
uint8_t select_ptr = 0;
//uint8_t list_y = LIST_Y(0);
struct example_list{
uint8_t y_position;
const char* list_name;
};
example_list list1[] = {
{LIST_Y(0), "SETTING 1"},
{LIST_Y(1), "SETTING 2"},
{LIST_Y(2), "SETTING 3"},
{LIST_Y(3), "SETTING 4"},
{LIST_Y(4), "SETTING 5"},
{LIST_Y(5), "SETTING 6"},
{LIST_Y(6), "SETTING 7"},
{LIST_Y(7), "SETTING 8"},
};
U8G2_ST7920_128X64_1_HW_SPI u8g2(U8G2_R0, /* CS=*/ 10, /* reset=*/ 8);
void u8g2_prepare(void) {
u8g2.setFont(u8g2_font_6x10_tf);
u8g2.setFontRefHeightExtendedText();
u8g2.setDrawColor(1);
u8g2.setFontPosTop();
u8g2.setFontDirection(0);
}
void glcd_initialize(void) {
u8g2.begin();
u8g2_prepare();
}
void glcd_print_list(void){
u8g2.firstPage();
do {
// draw list
u8g2.setDrawColor(1);
for(int i = 0; i < LIST_COUNT; i++){
u8g2.drawStr(LIST_X_START_POINT, list1[i].y_position, list1[i].list_name);
}
// selected list
u8g2.setDrawColor(1);
u8g2.drawBox(SELECT_X_START_POINT, SELECT_Y(select_ptr), SELECT_WIDTH, SELECT_HEIGHT);
u8g2.setDrawColor(0);
u8g2.drawStr(LIST_X_START_POINT, list1[select_ptr].y_position, list1[select_ptr].list_name);
if(select_ptr > 5){
// u8g2.drawRFrame(u8g2,,,,); // <---------- I'm here
}
} while (u8g2.nextPage());
}
As select_ptr will be modified by push button read function.
xfpd
March 6, 2024, 10:17pm
2
The u8g2 library has a graphics example with scrolling text.
I found this:
U8log is an extension to U8g2 and U8x8. It implements a text window with automatic vertical scrolling. Text is written to the current cursor position within the text window.
at:
https://github.com/olikraus/u8g2/wiki/u8logreference#introduction-to-u8log
But how to find it ? I couldn't find it in the library folder.
OK found it in u8g2-master and not in u8glib-master.
OK, I ran the example but it's horizontal scroll. I want a vertical scroll.
Scroll fluidly, pixel by pixel?
Or swapping boxes? Like there's A, B, C. D in a column; you turn your knob and then they're B. C, D, E.
1 Like
Yep, after a lot of trail/error I did it this way:
#include <U8g2lib.h>
// constants ////////////////////////////////////////////////
// # lists settings
#define LIST_COUNT 8
#define LIST_PER_FRAME 5
#define LIST_Y_START_POINT 1
#define LIST_X_START_POINT 2
#define LIST_Y(_Y) (LIST_Y_START_POINT+(12*_Y))
// # selection box settings
#define SELECT_WIDTH 65
#define SELECT_HEIGHT 11
#define SELECT_X_START_POINT 0
#define SELECT_Y_START_POINT 0
#define SELECT_Y(_Y) (SELECT_Y_START_POINT+(12*_Y))
// variables ////////////////////////////////////////////////
int8_t select_ptr = 0;
int8_t name_ptr = 0;
int8_t list_ptr = 0;
bool list_limi_lock = 0;
bool glcd_update = 0; // on button event, sensor read event ... etc.
//uint8_t list_y = LIST_Y(0);
struct example_list{
const char* list_name;
};
example_list list1[] = {
"SETTING 1", "SETTING 2", "SETTING 3", "SETTING 4", "SETTING 5", "SETTING 6", "SETTING 7", "SETTING 8"
};
U8G2_ST7920_128X64_1_HW_SPI u8g2(U8G2_R0, /* CS=*/ 10, /* reset=*/ 8);
void u8g2_prepare(void) {
u8g2.setFont(u8g2_font_6x10_tf);
u8g2.setFontRefHeightExtendedText();
u8g2.setDrawColor(1);
u8g2.setFontPosTop();
u8g2.setFontDirection(0);
}
void glcd_initialize(void) {
u8g2.begin();
u8g2_prepare();
}
void glcd_print_list(void){
if(!button_lock && !glcd_update){
u8g2.firstPage();
do {
u8g2.clearBuffer();
// draw full list
u8g2.setDrawColor(1);
for(int i = 0, j = list_ptr; i < LIST_PER_FRAME; j++, i++){
u8g2.drawStr(LIST_X_START_POINT, LIST_Y(i), list1[j].list_name);
}
// draw selected list with selection box
u8g2.setDrawColor(1);
u8g2.drawBox(SELECT_X_START_POINT, SELECT_Y(select_ptr), SELECT_WIDTH, SELECT_HEIGHT);
u8g2.setDrawColor(0);
u8g2.drawStr(LIST_X_START_POINT, LIST_Y(select_ptr), list1[name_ptr].list_name);
glcd_update = 1;
} while (u8g2.nextPage());
}
}
void glcd_update_button_control(void){
if (lcd_button_index && button_execution == true) {
switch(lcd_button_index){
case BUTTON_UP:
select_ptr--;
name_ptr--;
if(select_ptr < 0){ select_ptr = 0; list_ptr--; }
if(name_ptr < 1){ name_ptr = 0;}
if(list_ptr < 1){ list_ptr = 0;}
break;
case BUTTON_DOWN:
select_ptr++;
name_ptr++;
if(select_ptr > 4){ select_ptr = 4; list_ptr++; }
if(name_ptr > LIST_COUNT - 1){ name_ptr = LIST_COUNT - 1; }
if(list_ptr > LIST_COUNT - LIST_PER_FRAME){ list_ptr = LIST_COUNT - LIST_PER_FRAME;}
break;
case BUTTON_SET:
break;
case BUTTON_BACK:
break;
}
lcd_button_index = NOT_SELECTED;
button_execution = false;
glcd_update = 0;
}
}
const char *convert_number(uint16_t number) {
static char buf[3];
strcpy(buf, u8g2_u8toa(number, 2));
return buf;
}
const char *print_logic_state(bool number) {
static char buf[3];
strcpy(buf, u8g2_u8toa(number, 1));
return buf;
}
const char *print_motor_speed(uint16_t number) {
static char buf[3];
strcpy(buf, u8g2_u8toa(number, 3));
return buf;
}
I hope anyone find this helpful.
demo it on vimeo or youtube
1 Like
Yep, I'm really planning to, just need some more time to finish my current projects.
system
September 4, 2024, 7:56pm
11
This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.