c - What is the difference between LVM_GETITEM and LVM_GETITEMTEXT? -


i want text of listview row (text of item , subitems), not sure if should use lvm_getitem or lvm_getitemtext.

what difference between these 2 messages, first retrieve entire information item or subitem while other retrieve text?

both lvm_getitem , lvm_getitemtext can used retrieve item's or subitem's text data. since retrieving item's text data common operation, lvm_getitemtext message provided convenience implementation.

to illustrate difference, here 2 implementations using either message (error handling elided brevity):

std::wstring getlistviewitemtext( hwnd a_hwnd, int a_item, int a_subitem) {     std::vector<wchar_t> buffer( 1024 );     lvitem lvi = { 0 };     lvi.mask = lvif_text;  // required when using lvm_getitem     lvi.psztext = buffer.data();     lvi.cchmaxtext = static_cast<int>( buffer.size() );     lvi.iitem = a_item;    // required when using lvm_getitem     lvi.isubitem = a_subitem;      ::sendmessage( hwnd, lvm_getitem, 0, reinterpret_cast<lparam>( &lvi ) );      return std::wstring( lvi.psztext ); }

slightly shorter, using lvm_getitemtext:

std::wstring getlistviewitemtext( hwnd a_hwnd, int a_item, int a_subitem) {     std::vector<wchar_t> buffer( 1024 );     lvitem lvi = { 0 };     lvi.psztext = buffer.data();     lvi.cchmaxtext = static_cast<int>( buffer.size() );     lvi.isubitem = a_subitem;      ::sendmessage( hwnd, lvm_getitemtext, a_item, reinterpret_cast<lparam>( &lvi ) );      return std::wstring( lvi.psztext ); }

Comments

Post a Comment

Popular posts from this blog

php - failed to open stream: HTTP request failed! HTTP/1.0 400 Bad Request -

this code i'm using find latitude , longitude of place: function coords($address){ echo $url="http://maps.googleapis.com/maps/api/geocode/json?address=".$address; $json = file_get_contents(urlencode($url)); $data = json_decode($json, true); print_r($data['results'][0]['geometry']['location']['lat']); print_r($data['results'][0]['geometry']['location']['lng']); } however returns warning: failed open stream: http request failed! http/1.0 400 bad request if use above code in simple procedure works fine not in function. note: have tried curl_init()... method produced same result? instead of encoding whole url encode address part. following code work fine $add='jamshoro phase 2'; $url="http://maps.googleapis.com/maps/api/geocode/json?address=".urlencode($add); $json = file_get_contents($url); $data = json_decode($json, true); print_r($data['r
Read more

java - How to filter a backspace keyboard input -

i have code gives message when key number pressed: txtvalueofclause.addeventfilter(keyevent.key_typed, new eventhandler<keyevent>() { @override public void handle(keyevent t) { char ar[] = t.getcharacter().tochararray(); char ch = ar[t.getcharacter().tochararray().length - 1]; if (!(ch >= '0' && ch <= '9')) { system.out.println("the char entered not number"); t.consume(); } } }); now if press on wrong button , press backspace remove it, error message. how can add backspace input if statement? i have found answer: txtvalueofclause.addeventfilter(keyevent.key_typed, new eventhandler<keyevent>() { @override public void handle(keyevent t) { char ar[] = t.getcharacter().tochararray(); char ch = ar[t.getcharacter().tochar
Read more

java - Show Soft Keyboard when EditText Appears -

i have code in android app, alert dialog , keyboard, , when dialog shown want keyboard appear. not , not sure why? here code: final alertdialog.builder alert = new alertdialog.builder(this); alert.settitle("title"); alert.setmessage("message"); final edittext input = new edittext(this); input.setinputtype(inputtype.type_class_number); alert.setview(input); input.setonfocuschangelistener(new view.onfocuschangelistener() { @override public void onfocuschange(view v, boolean hasfocus) { if (hasfocus) { log.i(tag, "in focus"); inputmethodmanager inputmethodmanager = (inputmethodmanager) getsystemservice(context.input_method_service); inputmethodmanager.showsoftinput(input, inputmethodmanager.show_implicit); } } }); but keyboard not appear though edit text in focus, , tell appear why, doesn't come up? thanks in advance.
Read more