EVENT
Macro to help create event functions
int EVENT(CForm* pForm, CFormItem* pFormItem, int nFlag);
Parameters
- pForm - pointer to form that called event.
- pFormIten - pointer to form item that activated event such as a button.
- nFlag - flag values
Return Value
Event functions return 0 to stay in the form. Any other return value will cause the form to exit. The function that called FORM_SHOW can read the result.
Remarks
Examples
void MenuScreen(void) { FORM_INIT(Menu, EventMenuShow, NULL, NULL, NULL, nFormFlgShowHelp); FORM_ADD_BUTTON(Menu, SetDateTime, 0, 50, "1. Set Date/Time", '1', EventDateTime, FORM_BUTTON); FORM_ADD_BUTTON(Menu, ViewAccum, 0, 80, "2. View Accumulators", '2', EventViewAccum, FORM_BUTTON); FORM_SHOW(Menu); int n = FORM_RUN(Menu); FORM_HIDE(Menu); // n will contain the return result from any button event that caused the form to exit } EVENT(MenuShow) { ClearLCD(); DisplayText(0, 0, "Menu Screen"); return 0; } EVENT(SetDateTime) { // Hide the parent form IN_EVENT_HIDE_FORM; DateTimeScreen(); // Show the parent form IN_EVENT_SHOW_FORM; return 0; } EVENT(ViewAccum) { // Hide the parent form IN_EVENT_HIDE_FORM; ViewAccumScreen(); // Show the parent form IN_EVENT_SHOW_FORM; return 0; }
See Also
Last modified
7 years ago
Last modified on 04/12/18 13:15:41
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