Compare symbols

How-to
1

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Description

I have some labels in an array and I want to be able to determine which symbol is being displayed by any element by comparing.

What MCU/Processor/Board and compiler are you using?

STM32L4R5ZIVT / VisualGDB

What LVGL version are you using?

7.9

What do you want to achieve?

HI,
I would like a function that can be passed a symbol i.e. LV_SYMBOL_BLUETOOTH and then iterate through the array of labels with lv_label_get_text and then do something like a strcmp() to compare the two.

What have you tried so far?

char * labelText = lv_label_get_text(labelObj);

	if (strcmp(symbol, labelText) == 0 )
	{
		location = i;
	}

There is never a match between the symbol and the text from the label, even when they are the same

Code to reproduce

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2

Hi,

it works well for me:

  const char * symbol = LV_SYMBOL_BLUETOOTH;
  const char * text = LV_SYMBOL_BLUETOOTH;
  printf("%s\n", strcmp(symbol, text) == 0 ? "eq" : "neq");
3

Thanks for your reply. This is what I need to achieve:-

const char * symbol = LV_SYMBOL_BLUETOOTH;

char * labelText = lv_label_get_text(labelObj);

printf("%s\n", strcmp(symbol, labelText) == 0 ? “eq” : “neq”);

Thanks

4

It’s also working here:

  const char * symbol = LV_SYMBOL_BLUETOOTH;

  lv_obj_t * labelObj = lv_label_create(lv_scr_act(), NULL);
  lv_label_set_text(labelObj, LV_SYMBOL_BLUETOOTH);
  char * labelText = lv_label_get_text(labelObj);

  printf("%s\n", strcmp(symbol, labelText) == 0 ? "eq" : "neq");