Edit InputTextMultiline while active (for Auto Complete e.g.)

[kungfooman]

Hi, is there a way to edit a InputTextMultiline while being active? I tried all kinds of stuff, but I don't understand a lot from all the Unicode/Wchar/ASCII conversions.

I tried to copy the functions from the InputTextMultiline itself, but most times it either did nothing, crashes, or wrong results:

E.g. like

char *buf = str;
int buf_size = 4096;
ImGuiContext *g = ImGui::GetCurrentContext();
auto edit_state = g->InputTextState;
// Start edition
// Take a copy of the initial buffer value (both in original UTF-8 format and converted to wchar)
// From the moment we focused we are ignoring the content of 'buf' (unless we are in read-only mode)
const int prev_len_w = edit_state.CurLenW;
edit_state.Text.resize(buf_size+1);        // wchar count <= UTF-8 count. we use +1 to make sure that .Data isn't NULL so it doesn't crash.
edit_state.InitialText.resize(buf_size+1); // UTF-8. we use +1 to make sure that .Data isn't NULL so it doesn't crash.
ImStrncpy(edit_state.InitialText.Data, buf, edit_state.InitialText.Size);
const char* buf_end = NULL;
//edit_state.CurLenW = ImTextStrFromUtf8(edit_state.Text.Data, edit_state.Text.Size, buf, NULL, &buf_end);
//edit_state.CurLenA = (int)(buf_end - buf); // We can't get the result from ImFormatString() above because it is not UTF-8 aware. Here we'll cut off malformed UTF-8.
//edit_state.CursorAnimReset();	

I use it to edit JavaScript ingame and it would be nice to use Ctrl+Space to auto complete :)

[ocornut]

Sorry this code is rather messy/complex. The eventual goal is to get rid of the conversions alltogether. To answer your question, currently the only legal way to modify the active buffer is to use the custom callback to InputTextMultiline(). Check out the docs around that.

[kungfooman]

Thanks, that works like a charm :)

int repl_callback(ImGuiTextEditCallbackData *data) {
	if (autocomplete) {
		char returnbuffer[256] = {0};
		js_call("get_auto_completion", "siiii", replbuffer, data->CursorPos, data->SelectionStart, data->SelectionEnd, returnbuffer);
		//log("got returnbuffer: %s\n", returnbuffer);
		data->InsertChars(data->CursorPos, returnbuffer);
		autocomplete = 0;
	}
	//log("callback called\n");
	return 0;
}


ImGui::InputTextMultiline("", replbuffer, sizeof replbuffer, ImGui::GetWindowSize() + ImVec2(-15, -35), ImGuiInputTextFlags_CallbackAlways, repl_callback);