c++ - Qt Connecting SIGNAL and SLOT in object member of MainWindow -

-

मेरे पास एक क्लास MyClass है: 

  - निजी: pushbutton * बटन; शून्य कनेक्टसिग्नल एंडस्लॉट (); - निजी स्लॉट: शून्य बटनएक्शन ();

मैं इनसे जुड़ने के लिए MySQL में कनेक्ट करना चाहते हैं; जैसे: 

  शून्य MyClass :: connectSignalAndSlot () {QObject :: कनेक्ट (बटन , सिग्नल (क्लिक किया ()), इस, स्लॉट (buttonAction ())); }

यह मुझे 

  कॉल करने के लिए 'QObject :: connect (QPushButton *, & const char *, MyClass) के लिए कोई मिलान समारोह नहीं देता है * Const, const char *) ';

अगर मैं MyClass के साथ क्यू ऑब्जेक्ट प्राप्त करता हूं, तो प्रोग्राम को संकलित और शुरू होता है, लेकिन तब मुझे निम्न अनुप्रयोगों को मेरे अनुप्रयोग आउटपुट फलक में प्रदर्शित किया जाता है: 

  QObject: : कनेक्ट करें: ऐसा कोई स्लॉट नहीं है QObject :: buttonAction () में .. \ MyProject \ myclass.cpp: 48

मुझे बटन और स्लॉट को सार्वजनिक करना है और उन्हें मेन-विंडों में उपयोग करना है केवल कक्षा? क्या इसको MyClass स्तर पर रखने का कोई तरीका नहीं है?

आपकी मदद के लिए धन्यवाद!

आपकी MyClass परिभाषा (हैडर फ़ाइल) में MyClass से प्राप्त करें QObject और Q_OBJECT में मैक्रो जोड़ें। स्लॉट / सिग्नल काम करने के लिए। 

  वर्ग MyClass: public QObject {Q_OBJECT सार्वजनिक: ....};

Comments

Post a Comment

Popular posts from this blog

java - org.apache.http.ProtocolException: Target host is not specified -

-
I have written a simple httprequest / response code and I am getting this error below: I used to type in my classpath httpclient, httpcore, common -Codecs and general logging. I am very new to Java and I do not know what's going on here. Please help me. code: import org.apache.http.client.HttpClient; Import org.apache.http.client.methods.HttpGet; Import org.apache.http.HttpResponse; Import org.apache.http.impl.client.HttpClientBuilder; Import org.apache.http.Header; Import org.apache.http.HttpHeaders; Public class UnshorteningUrl {public static zero main (string [] args throws exception {HttpGet request = zero; HTTP Client Client = HTTP ClientBuilder.credit (). Build (); Try {Request = New HTTP Gate ("trib.me/1lBFzSi"); HttpResponse httpResponse = client.execute (request); Header [] header = httpResponse.getHeaders (HttpHeaders.LOCATION); // Preconditions.checkState (headers.length == 1); String new url = header [0] .getValue (); System.out.println ("new url...
Read more

c# - Chart control: Design messed Up after clearing and re-adding Y-Values -

-
Image
The day was struggling with this. I have three series on a chart that looks like this. Note: I am using vanof control. They are being added on the basis of input from the calculation. I am using this code to add value to each series. this.chart1.Series ["green"]. Points. AddY (greenvalue); This.chart1.Series ["totalsaving"] Points.AddY (totalsavingvalue). This.chart1.Series ["blue"] Points.AddY (bluevalue). I have set series properties like this. Both green and totalsaving are set to StackedColumn, the blue chart is set to the column for type. I started then To do is a button that brings the user back to the input field and then I am using this code to clear the series values ​​on the start code. chart 1. Series ["totaling"]. Points. clear (); Chart1.Series ["green"] Points.Clear () .; Chart1.Series ["blue"] Points.Clear () .; The same calculation click above is being calculated for the calculation of th...
Read more

ruby on rails - Apipie interferes with proper error codes -

-
I can not find this little bit in the API's docs. Let me make this special AP ready, and I thought I would document it with APP, all fine and dandy, and the ultimate verification is good, but I feel that the response to failure in verification I can not seem to throw the right HTTP code in For example, I have this post / user method, which obviously makes the user in my database good, right? Well, this is something wrong, and it's ok, but if, say, I throw the standards that it does not pass the validity of the apipie, chops apipies and throws a good old-fashioned error, if something is wrong, 422 responds with a fixed unit failure / error: post '/users.json' ,: user = & gt; D Apipie :: ParamInvalid: Invalid parameter 'Email' value "": Regular expression / [a-zA-Z0-9 will match - -] + \ @ [a-zA-Z0-9 \ -.] + \. [Az] {2,} /. # ./spec/requests/usersapi_spec.rb:66:in `In Block (Level 3) & lt; Top (required) & gt; ' Let me assume ...
Read more