How to add a line drawing in an existing Text window

ajax · February 12, 2016 at 5:39 PM

I am very new using emWin and I have the following question:

I have a text window with a text "Measurement"

ta = TEXT_CreateEx(140, 100, 150, 20, myProc->win, WM_CF_SHOW, GUI_TA_LEFT | GUI_TA_VCENTER, id++, "Measurement");
TEXT_SetFont(ta, FONT4);
TEXT_SetBkColor(ta, 0xccffff);

and I would like to add a line above the label "Measurement" in order to inform that what follows is an "average value" (let's assume that I cannot use a more elegant solution applying the proper set of fonts for this purpose).

How can I achieve this goal? I read some comments regarding using the callback of the window. However, I could not see a simple piece of code demonstrating how to do this.

Any hints?

Thank you

SEGGER - Jörg · March 1, 2016 at 10:45 AM

Hi,

You could overwrite the callback function of the TEXT widget. For all events except WM_PAINT you should call the default text widget callback function TEXT_Callback(). Within the WM_PAINT event the default function should be called first and then other things could be drawn on top. The sample WIDGET_ButtonRound() shows how to overwrite a callback function.

Regards, Jörg

ajax · March 3, 2016 at 3:38 PM

@Jorg: thank you - I will look for details at the suggested example.

Participate now!