为 C++ 在 wxWidgets 中手动触发 wxTextCtrl 上的 ENTER 按键事件？

Question

I have this text control:

FTextCtrl = new wxTextCtrl(parent, wxID_ANY, _("Text"), wxPoint(20, 20), wxDefaultSize, wxTE_CENTRE | wxTE_PROCESS_ENTER, wxDefaultValidator, _T("ID_TC"));
FTextCtrl->Connect(wxEVT_CHAR, (wxObjectEventFunction)OnTextCharEvnt, NULL, this);

This function OnTextCharEvnt gets called whenever an Enter key is pressed on the text control.

How can I manually trigger this event (when my text cursor is inside the text control) and call this function OnTextCharEvnt using the same?

Answer 1

I use EVT_TEXT_ENTER It works;

sample.h

enum{
 TEXT_FTextCtrl
}

sample.cpp

FTextCtrl = new wxTextCtrl(parent, TEXT_FTextCtrl, wxT("Text"), wxPoint(20, 20), wxDefaultSize, wxTE_CENTRE | wxTE_PROCESS_ENTER, wxDefaultValidator, _T("ID_TC"));

BEGIN_EVENT_TABLE(Sample, wxFrame)
EVT_TEXT_ENTER(TEXT_FTextCtrl, Sample::OnTextCharEvnt)
END_EVENT_TABLE()

Answer 2

You don't need to trigger any events to call your own function -- just call it directly instead. Calling the event handler directly is awkward and not recommended, but this is a trivial solution avoiding it -- just have a normal function that you can call both from that event handler and directly:

void Sample::OnTextCharEvnt(wxCommandEvent& event) { DoHandleCharEvent(event.GetUnicodeKey()); }

void Sample::DoHandleCharEvent(wchar_t key) { ... your actual code for handling it ... }

void Sample::SomeOtherFunction() { DoHandleEnter(); }

If you used the recommended Bind() function rather than old Connect() , you could even avoid having the trivial OnTextCharEvnt() entirely by using a lambda instead, eg:

FTextCtrl->Bind(wxEVT_CHAR, [](wxCommandEvent& event) {
    DoHandleCharEvent(event.GetUnicodeKey());
});

All this ignores the fact that you should not be using wxEVT_CHAR with wxTextCtrl in the first place, but should handle either wxEVT_TEXT or wxEVT_TEXT_ENTER or both of them, instead of lower level char events (that won't get triggered at all if the user pastes something in the control, for example).