StackOverflow2013

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plurals

PO
primarykey
Id
14091811
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2012-12-30T15:09:43.143
FavoriteCount
0
LastActivityDate
2012-12-30T15:09:43.143
LastEditDate
LastEditorUserId
0
OwnerUserId
1248266
ParentId
14090353
PostTypeId
2
Score
1
ViewCount
0
LastEditorDisplayName
text
Body
It could be done using several methods , the easiest one (not the most clever) is making intermediate connection, from object A to mainwindows,mainwindow to B mainwindow.h <pre><code>#ifndef MAINWINDOW_H #define MAINWINDOW_H #include <QMainWindow> #include "classa.h" #include "classb.h" namespace Ui { class MainWindow; } class MainWindow : public QMainWindow { Q_OBJECT public: explicit MainWindow(QWidget *parent = 0); ~MainWindow(); private: Ui::MainWindow *ui; classA *a; classB *b; signals: void TosignalA(); void TosignalB(); public slots: void emitB(); private slots: void on_pushButton_clicked(); }; #endif // MAINWINDOW_H </code></pre> mainwindow.cpp <pre><code>#include "mainwindow.h" #include "ui_mainwindow.h" MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) { ui->setupUi(this); a = new classA(this); b=new classB(this); connect(this,SIGNAL(TosignalA()),this->a,SLOT(emitsig())); connect(this->a,SIGNAL(signal()),this,SLOT(emitB())); connect(this,SIGNAL(TosignalB()),this->b,SLOT(on_signal())); } MainWindow::~MainWindow() { delete ui; } void MainWindow::emitB() { emit TosignalB(); } void MainWindow::on_pushButton_clicked() { emit TosignalA(); } </code></pre> classa.h <pre><code>#ifndef CLASSA_H #define CLASSA_H #include <QObject> class classA : public QObject { Q_OBJECT public: explicit classA(QObject *parent = 0); signals: void signal(); public slots: void emitsig(); }; #endif // CLASSA_H </code></pre> classa.cpp <pre><code>#include "classa.h" classA::classA(QObject *parent) : QObject(parent) { } void classA::emitsig() { emit signal(); } </code></pre> classb.h <pre><code>#ifndef CLASSB_H #define CLASSB_H #include <QObject> #include <QtGui> class classB : public QObject { Q_OBJECT public: explicit classB(QObject *parent = 0); signals: public slots: void on_signal(); }; #endif // CLASSB_H </code></pre> classb.cpp <pre><code>#include "classb.h" classB::classB(QObject *parent) : QObject(parent) { } void classB::on_signal() { QMessageBox *msgBox = new QMessageBox(); msgBox->setText("signal emitted!"); msgBox->exec(); } </code></pre>
Tags
Title
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. POSending messages between two widgets using Signals and Slots
 singulars
 PostTypePostTypeId
 PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. This table or related slice is empty.
UserOwnerUserId
1. USAhmed Kato
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. This table or related slice is empty.
VotesPostIdCreationDate
1. VO
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 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
CommentsPostId
1. This table or related slice is empty.

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