SetKeyEvent
CForm member function to set an event to alter received keypresses before processing by the form.
void CForm::SetKeyEvent(int (*pEventKey)(CForm* pForm, CFormItem *pItem, int nData))
Parameters
pEventKey = Event to handle keypresses
Return Value
This function may return 0 to disregard the keypress or the ASCII value to be processed as the key.
Remarks
Examples
int DontAllowZKey(CForm* pForm CFormItem* pItem, int nData) { if(nData == 'Z') return 0; else return nData; } void CreateNoZForm(void) { FORM_INIT(NoZ, EventNoZShow, NULL, NULL, NULL, nFormFlgNone); FORM_ADD_INPUT(NoZ, ID, FONT_WIDTH * 2, FONT_HEIGHT * 3, "Input: ", 10, 0, 0, NULL, g_strID, NULL, "Enter ID, 'Z' not allowed"); formNoZ.SetKeyEvent(DontAllowZKey); FORM_SHOW(NoZ); FORM_RUN(NoZ); FORM_HID(NoZ); }
See Also
Last modified
5 years ago
Last modified on 06/27/19 08:54:11
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