I use this code to getData from javascript:
const QVariant myvar = this->page()->mainFrame()->
evaluateJavaScript("measureDistance("+QString::fromStdString(prev->marker_id)+","+QString::fromStdString(stop->marker_id+");"));
bool ok;
const int myint = myvar.toInt(&ok);
if (!ok)
qWarning() << "Error getting int from JS";
qDebug() << myint;
getMapTimeDistance(location, QString::fromStdString(prev->getName()), stop, 10);
And in javascript the last line is:
function measureDistance(m1, m2) {
var wp = new Array();
var lstart = new google.maps.LatLng(markers[m1].position);
var lend = new google.maps.LatLng(markers[m2].position);
var request = {
origin : lstart,
destination : lend,
waypoints : [],
optimizeWaypoints: true,
travelMode : google.maps.DirectionsTravelMode.DRIVING
};
directionsService.route(request, function(response, status) {
if (status== google.maps.DirectionsStatus.OK) {
response.routes[0].legs[0].duration.text;
} else {
document.getElementById('locationD').value = "drawRouteBad";
}
});
}
Do you know why this code won't work for me? I've tried different combinations of types, but nothing helped. Probably I don't know what type is javasscripts value. Maybe I should pass it to the qt in different way?
response.routes[0].legs[0].duration.value; is coming from the Google Maps API v3 Directions Service (per your last question. That service is asynchronous, you can't return anything from the call to it, you have to use any data you need inside the callback function (when it has been returned from the server and is available).
Related
I am working on two apps, in one of my app "A" i applied retrofit 2.
This was the method i used to retrieve data.
But here in on Response the data retrieved in response body can be set to activity variables and can be used outside this method without getting null values.
public void fetch_information() {
ApiInterface = ApiClient.getApiClient().create(Api.class);
Call<List<City>> call = ApiInterface.GetCities();
call.enqueue(new Callback<List<City>>() {
#Override
public void onResponse(Call<List<City>> call, Response<List<City>> response) {
citylist = new ArrayList<City>();
citylist = response.body();
cities = new String[citylist.size()];
citiesid = new String[citylist.size()];
for (int i = 0; i < citylist.size(); i++) {
cities[i] = citylist.get(i).getCityName();
citiesid[i] = citylist.get(i).getCityId();
}
city_adapter = new ArrayAdapter<String>(Pay_Payment_X.this, android.R.layout.simple_list_item_1, cities);
city_adapter.setDropDownViewResource(R.layout.spinner_dropdown_layout);
City_Spinner.setAdapter(city_adapter);
}
#Override
public void onFailure(Call<List<City>> call, Throwable t) {
Toast.makeText(getApplicationContext(), t.getMessage(), Toast.LENGTH_SHORT).show();
}
});
}
after applying this method and on debugging this method i will retain values of varaibles "cities" and "citiesid"out side onResponse.
But applying retrofit 2 similarly on another app "B", i did the same thing for retrieving data on different URL.
ApiUtil.getServiceClass().getAllPost().enqueue(new Callback<List<ApiObject>>() {
#Override
public void onResponse(Call<List<ApiObject>> call, Response<List<ApiObject>> response) {
if (response.isSuccessful()) {
List<ApiObject> postList = response.body();
try {
for (int i = 0; i < postList.size(); i++) {
String Name = postList.get(i).getGamesName();
mGamesName.add(Name);
}
} catch (Exception e) {
}
Log.d(TAG, "Returned count " + postList.size());
NewAdapter adapter = new NewAdapter(getApplicationContext(), postList);
recyclerView.setAdapter(adapter);
}
}
#Override
public void onFailure(Call<List<ApiObject>> call, Throwable t) {
//showErrorMessage();
Log.d(TAG, "error loading from API");
}
});
the data is retrievable inside onResponse but outside it shows null.
So here variables are not retaining values.
Why is this happening?
the only thing came to mind is retrieving data can take time while your code lines are being read and finding null values as data has not been received yet.
Also to mention in app "A" the data retrieved is huge but in app "B" only 3 objects with string values.But still in app"A" data is retrievable.
In app 2 did this for resolving my issue.
public void doRequest( final ApiCallback callback){
ApiUtil.getServiceClass().getAllPost().enqueue(new Callback<List<ApiObject>>() {
#Override
public void onResponse(Call<List<ApiObject>> call, Response<List<ApiObject>> response) {
if (response.isSuccessful()) {
List<ApiObject> postList = response.body();
callback.onSuccess(postList);
// apobject =response.body();
if(response.isSuccessful()) {
try {
for (int i = 0; i < postList.size(); i++) {
String Name = postList.get(i).getGamesName().toString();
mGamesName.add(Name);
}
} catch (Exception e) {
}
}
Log.d(TAG, "Returned count " + postList.size());
NewAdapter adapter = new NewAdapter(getApplicationContext(), postList);
recyclerView.setAdapter(adapter);
}
}
#Override
public void onFailure(Call<List<ApiObject>> call, Throwable t) {
//showErrorMessage();
Log.d(TAG, "error loading from API");
}
});
}
pass an interface
public interface ApiCallback{
void onSuccess(List<ApiObject> result);
}
and in on Create view of activity i called this
doRequest(new ApiCallback(){
#Override
public void onSuccess(List<ApiObject> result){
//here i can set variable values
}
});
the only thing came to mind is retrieving data can take time while your code lines are being read and finding null values as data has not been received yet.
That's entirely correct. Your call is finishing after you check the values. I'm going to go on a limb here and say that it's just a coincidence that it works on one app and not in the other (if they are actually doing it the same way)
When you call callback.onSuccess(postList); doesn't seem to be right either, because you haven't checked yet for success. This means that response.body() might be null and response.errorBody() will contain the body of the error.
If you'd move callback.onSuccess inside the if this would be fixed:
if(response.isSuccessful()) {
callback.onSuccess(response.body());
try {
for (int i = 0; i < postList.size(); i++) {
String Name = postList.get(i).getGamesName().toString();
mGamesName.add(Name);
}
} catch (Exception e) {
}
Last but not least, inside the onSuccess method is when you can use your global variables. Maybe it's better to stop using global variables and just use the callback parameters.
This is not C++/CLI. This is UWP C++/CX
I am trying to send an HttpRequestMessage outside of a managed class in C++. I looked at the UWP samples, but their requests occur inside of a managed class.
All I want to do is send the request, and then have a callback function. I don't need fancy async/await patterns. This is looking to be a lot more difficult than it should be.
EDIT: I have gotten it to work, but the error handling is atrocious. The extra error handling code from the UWP HttpClient example was not compiling.
client = ref new Windows::Web::Http::HttpClient();
client->DefaultRequestHeaders->UserAgent->Append(ref new Windows::Web::Http::Headers::HttpProductInfoHeaderValue("Windows", "10"));
cancellation_token_source cancellationTokenSource = cancellation_token_source();
create_task(client->SendRequestAsync(message)).then([=](Windows::Web::Http::HttpResponseMessage^ response)
{
auto operation = response->Content->ReadAsBufferAsync();
auto task = create_task(operation);
if (task.wait() == task_status::completed)
{
webResponse->statusCode = (int)response->StatusCode;
auto buffer = task.get();
size_t length = buffer->Length;
if (length > 0)
{
Array<byte>^ array = nullptr;
CryptographicBuffer::CopyToByteArray(buffer, &array);
webResponse->contentLength = array->Length;
webResponse->data = (byte*)malloc(webResponse->contentLength);
memcpy(webResponse->data, array->Data, webResponse->contentLength);
delete array;
}
for each(IKeyValuePair<String^, String^>^ pair in response->Headers)
{
std::string key = PlatformStringToString(pair->Key);
std::string value = PlatformStringToString(pair->Value);
if (key == "Content-Type" && false)
{
// Should have this for completeness, but do we really care?
}
else
{
Web::WebHeader *header = new Web::WebHeader(key.c_str(), value.c_str());
webResponse->AddHeader(header);
}
}
if (request->receiveDoneCallback)
request->receiveDoneCallback(webResponse, request->userPtr);
}
else
abort();
delete request;
delete response;
});
I have a very basic question. Is it possible to convert a string into a closure? I tried evaluate() but it didn't work.
evaluate( "myFunction = function(val){ return dollarFormat( val ); }" );
What I have in mind is to save custom functions in the database as string and then run it as needed.
Thank you!
Edit: Just to clarify: I want to be able to save "function(val){ return dollarFormat( val ); }" as a string in database and be able to convert it into a functioning closure.
I would go with user2943775 answer:
<cfscript>
FileWrite("/ram/UDFs.cfm", "<cfset myFunction = function(val){ return dollarFormat( val ); }>")
include template="/ram/UDFs.cfm";
writedump(myFunction(10));
</cfscript>
And in your Application.cfc
component {
this.mappings["/ram"] = "ram://";
...
}
I came across a similar solution, though I was unable to use the in-memory filesystem due to security restrictions. In my Application.cfc, I added the following mapping:
this.mappings = {
"/models" = "#APP_ROOT_PATH#cfcs/models",
"/utils" = "#APP_ROOT_PATH#cfcs/utils",
"/modules" = "#APP_ROOT_PATH#_modules",
"/components" = "#APP_ROOT_PATH#cfcs",
"/udfs" = "#APP_ROOT_PATH#includes/udfs" // path for global (and temporary) UDFs
};
The UDF I created is as follows:
/**
* Takes a string representation of a function and returns it as a Closure
* #output false
* #return Closure
*/
private any function toClosure (required string closure) {
local.id = replace(createUUID(), "-", "", "all");
local.udfpath = "/udfs/udf#id#.cfm";
local.script = "<cfscript>local.fn#id# = #closure#;</cfscript>";
try {
fileWrite(expandPath(udfPath), script);
include udfpath;
} catch (any e) {
} finally {
try {
fileDelete(expandPath(udfPath));
} catch (any e) {}
}
if (!structkeyExists(local, "fn#id#") || !isClosure(local["fn#id#"])) {
throw (message="Unable to compile closure");
}
// return the closure
return local["fn#id#"];
}
And the result:
myFn = toClosure("function (num) { return num + 1; }");
myFn(1); // returns 2
I've written the small vala program below, and I don't know how
to manipulate the GLib.Value types, see the code below :
http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-good-plugins/html/gst-plugins-good-plugins-level.html
using Gst;
void application_message(Gst.Bus bus, Gst.Message msg) {
var s = msg.get_structure();
if(s == null)
return;
string msgtype = s.get_name();
if(msgtype != "level")
return;
GLib.Value rms = s.get_value("rms");
GLib.Value st = s.get_value("stream-time");
// according to the doc here : http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-good-plugins/html/gst-plugins-good-plugins-level.html
// "rms" is apparently a "GValueArray of gdouble"
// and
// "st" is a GstClockTime, which is a "typedef guint64 GstClockTime"
// I want to create a string representation of the two, ex:
// 72374237490234, [0.234234,0,424234234,0.423423423,0.5345345, ...]
// and I'm clueless as to how to do the conversions or typecasts...
}
void main (string[] args) {
Gst.init (ref args);
try {
var pipeline = Gst.parse_launch(
"pulsesrc device=\"alsa_input.usb-046d_08c9_674634A4-02-U0x46d0x8c9.analog-mono\" ! " +
"level name=wavelevel interval=10000000 ! " +
"wavenc ! filesink location=audioz.wav"
);
var bus = pipeline.get_bus();
bus.add_signal_watch();
bus.message.connect(application_message);
// Set pipeline state to PLAYING
pipeline.set_state (State.PLAYING);
// Creating and starting a GLib main loop
new MainLoop ().run ();
}
catch(Error e) {
print("%s\n", e.message);
}
}
UPDATE :
THe doc for GLib.Value is here : http://www.valadoc.org/#!api=gobject-2.0/GLib.Value
calling strdup_contents() is somewhat satisfactory, but I'd like to manipulate the array in rms,
printl(rms.type().name()) tells me that it's a GstValueList,
so I'd thing that I should cast it to this :
http://www.valadoc.org/#!api=gstreamer-1.0/Gst.ValueList
but vala seems to know nothing of the type Gst.ValueList...
Vala makes working with GLib.Value very easy, it will implicitly convert between GLib.Value and the native types. Throwing GLib.StringBuilder into the mix to build your array, something like this (untested) should do the trick:
GLib.StringBuilder s = new GLib.StringBuilder ();
s.append (((uint64) st).to_string ());
s.append (",[");
{
bool first = true;
foreach ( unowned GLib.Value value in rms.values ) {
if (!first) {
s.append_c (',');
} else {
first = false;
}
s.append (((double) value).to_string ());
}
}
s.append_c (']');
I am trying to extend dijit.form.FilteringSelect with the requirement that all instances of it should match input regardless of where the characters are in the inputted text, and should also ignore whitespace and punctuation (mainly periods and dashes).
For example if an option is "J.P. Morgan" I would want to be able to select that option after typing "JP" or "P Morgan".
Now I know that the part about matching anywhere in the string can be accomplished by passing in queryExpr: "*${0}*" when creating the instance.
What I haven't figured out is how to make it ignore whitespace, periods, and dashes. I have an example of where I'm at here - http://jsfiddle.net/mNYw2/2/. Any help would be appreciated.
the thing to master in this case is the store fetch querystrings.. It will call a function in the attached store to pull out any matching items, so if you have a value entered in the autofilling inputfield, it will eventually end up similar to this in the code:
var query = { this.searchAttr: this.get("value") }; // this is not entirely accurate
this._fetchHandle = this.store.query(query, options);
this._fetchHandle.then( showResultsFunction );
So, when you define select, override the _setStoreAttr to make changes in the store query api
dojo.declare('CustomFilteringSelect', [FilteringSelect], {
constructor: function() {
//???
},
_setStoreAttr: function(store) {
this.inherited(arguments); // allow for comboboxmixin to modify it
// above line eventually calls this._set("store", store);
// so now, 'this' has 'store' set allready
// override here
this.store.query = function(query, options) {
// note that some (Memory) stores has no 'fetch' wrapper
};
}
});
EDIT: override queryEngine function as opposed to query function
Take a look at the file SimpleQueryEngine.js under dojo/store/util. This is essentially what filters the received Array items on the given String query from the FilteringSelect. Ok, it goes like this:
var MyEngine = function(query, options) {
// create our matching query function
switch(typeof query){
default:
throw new Error("Can not query with a " + typeof query);
case "object": case "undefined":
var queryObject = query;
query = function(object){
for(var key in queryObject){
var required = queryObject[key];
if(required && required.test){
if(!required.test(object[key])){
return false;
}
}else if(required != object[key]){
return false;
}
}
return true;
};
break;
case "string":
/// HERE is most likely where you can play with the reqexp matcher.
// named query
if(!this[query]){
throw new Error("No filter function " + query + " was found in store");
}
query = this[query];
// fall through
case "function":
// fall through
}
function execute(array){
// execute the whole query, first we filter
var results = arrayUtil.filter(array, query);
// next we sort
if(options && options.sort){
results.sort(function(a, b){
for(var sort, i=0; sort = options.sort[i]; i++){
var aValue = a[sort.attribute];
var bValue = b[sort.attribute];
if (aValue != bValue) {
return !!sort.descending == aValue > bValue ? -1 : 1;
}
}
return 0;
});
}
// now we paginate
if(options && (options.start || options.count)){
var total = results.length;
results = results.slice(options.start || 0, (options.start || 0) + (options.count || Infinity));
results.total = total;
}
return results;
}
execute.matches = query;
return execute;
};
new Store( { queryEngine: MyEngine });
when execute.matches is set on bottom of this function, what happens is, that the string gets called on each item. Each item has a property - Select.searchAttr - which is tested by RegExp like so: new RegExp(query).test(item[searchAttr]); or maybe a bit simpler to understand; item[searchAttr].matches(query);
I have no testing environment, but locate the inline comment above and start using console.debug..
Example:
Stpre.data = [
{ id:'WS', name: 'Will F. Smith' },
{ id:'RD', name:'Robert O. Dinero' },
{ id:'CP', name:'Cle O. Patra' }
];
Select.searchAttr = "name";
Select.value = "Robert Din"; // keyup->autocomplete->query
Select.query will become Select.queryExp.replace("${0]", Select.value), in your simple queryExp case, 'Robert Din'.. This will get fuzzy and it would be up to you to fill in the regular expression, here's something to start with
query = query.substr(1,query.length-2); // '*' be gone
var words = query.split(" ");
var exp = "";
dojo.forEach(words, function(word, idx) {
// check if last word
var nextWord = words[idx+1] ? words[idx+1] : null;
// postfix 'match-all-but-first-letter-of-nextWord'
exp += word + (nextWord ? "[^" + nextWord[0] + "]*" : "");
});
// exp should now be "Robert[^D]*Din";
// put back '*'
query = '*' + exp + '*';