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blockingclient.h Example File
network/blockingfortuneclient/blockingclient.h

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    #ifndef BLOCKINGCLIENT_H
    #define BLOCKINGCLIENT_H

    #include <QDialog>

    #include "fortunethread.h"

    class QLabel;
    class QLineEdit;
    class QPushButton;

    class BlockingClient : public QDialog
    {
        Q_OBJECT

    public:
        BlockingClient(QWidget *parent = 0);

    private slots:
        void requestNewFortune();
        void showFortune(const QString &fortune);
        void displayError(int socketError, const QString &message);
        void enableGetFortuneButton();

    private:
        QLabel *hostLabel;
        QLabel *portLabel;
        QLineEdit *hostLineEdit;
        QLineEdit *portLineEdit;
        QLabel *statusLabel;
        QPushButton *getFortuneButton;
        QPushButton *quitButton;

        FortuneThread thread;
        QString currentFortune;
    };

    #endif


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Qt 4.0.1