error: invalid use of incomplete type 'class BaseDialog'

Lee_X

Hi I'm trying to display a simple dialog but I get compile errors on ESP32-S2

I'm following this: https://www.thecoderscorner.com/products/arduino-libraries/tc-menu/rendering-with-tcmenu-lcd-tft-oled/

BaseDialog* dlg = renderer.getDialog();
dlg->setButtons(BTNTYPE_OK, BTNTYPE_CANCEL, 1);
dlg->show("hello", false, onDialogFinished);

gives:
error: invalid use of incomplete type 'class BaseDialog' dlg->setButtons(BTNTYPE_OK, BTNTYPE_CANCEL, 1);

Has something changed in the last version of tcMenu? What is the correct way to display (and hide!) an alert in version 2.4.0?

Thanks!

Lee_X

also tried this from the latest esp32 s2 example:

auto dlg = renderer.getDialog();
  if (!dlg->isInUse()) {
    dlg->setButtons(BTNTYPE_NONE, BTNTYPE_CLOSE);
    dlg->showRam("Saved", false);
    dlg->copyIntoBuffer("to flash");
  }

which gives

error: invalid use of incomplete type 'class BaseDialog' if(!dlg->isInUse()) { .... note: forward declaration of 'class BaseDialog' class BaseDialog;

so any idea on how to show a dialog would be great!

davetcc

After upgrading to library 2.4, did you also upgrade the UI and run the code generator to ensure the plugins were up-to-date?

If you didn't want to do that, you could copy the same display plugin files from one of the examples, it would have the same effect.

davetcc

Ah, also make sure you

#include <BaseDialog.h>

in the file in question.

Lee_X

thanks Dave, forgot about that! smilie

davetcc

I've updated the docs to make it more clear that it is needed.