只需单击一次，QTWidget就会显示两次

时间：2015-05-11 13:33:42

标签： c++ qt dialog

我有一个如下的Qdialog：
enter image description here

和另一个当我单击“确定”而没有选择图像和分类器文件时触发的那个，就像这里一样 enter image description here

我已将Browse ...按钮链接到QFileDialog。现在，当我点击浏览图像按钮时，它会打开一个文件对话框，然后当我选择文件并按OK时，它会重新打开它。其他浏览按钮和包含标签的对话框也是如此。

任何想法，当事件只发生一次时，为什么会发生2次？ 这是插槽：

void MySecondQtProject::on_pushImage_clicked()
{
    image =
        QFileDialog::getOpenFileName(this, tr("open file"), "C:/Users/mankum93/Documents/Visual Studio 2013/Projects/BananaClassifierOpenCV/BananaClassifierOpenCV",
        "Images (*.png *.xpm *.jpg)");
}

void MySecondQtProject::on_pushClassifier_clicked()
{
    classifier =
        QFileDialog::getOpenFileName(this, tr("open file"), "C:/Users/mankum93/Documents/Visual Studio 2013/Projects/BananaClassifierOpenCV/BananaClassifierOpenCV",
        "XML files (*.xml)");
}

void MySecondQtProject::on_pushOK_clicked()
{
    accept();

    //Now lets compare for invalidity of any string:
    if (image.isNull() || classifier.isNull())
    {
        ShowErrorDialog dialog(this);
        dialog.exec();
    }
    else
    {
        //Convert Qstring to std::string
        String imageFileName = image.toLocal8Bit().constData();
        String cascadeFileName = classifier.toLocal8Bit().constData();

        // Now, we can go to main detection logic
        detectObject(imageFileName, cascadeFileName);
    }
}

PS：我是QT的新手

编辑1：元对象代码

void MySecondQtProject::qt_static_metacall(QObject *_o, QMetaObject::Call _c, int _id, void **_a)
{
    if (_c == QMetaObject::InvokeMetaMethod) {
        MySecondQtProject *_t = static_cast<MySecondQtProject *>(_o);
        switch (_id) {
        case 0: _t->on_pushImage_clicked(); break;
        case 1: _t->on_pushClassifier_clicked(); break;
        case 2: _t->on_pushOK_clicked(); break;
        default: ;
        }
    }
    Q_UNUSED(_a);
}

EDIT2：用户界面文件代码

/********************************************************************************
** Form generated from reading UI file 'mysecondqtprojectHp7256.ui'
**
** Created by: Qt User Interface Compiler version 5.4.1
**
** WARNING! All changes made in this file will be lost when recompiling UI file!
********************************************************************************/

#ifndef MYSECONDQTPROJECTHP7256_H
#define MYSECONDQTPROJECTHP7256_H

#include <QtCore/QVariant>
#include <QtWidgets/QAction>
#include <QtWidgets/QApplication>
#include <QtWidgets/QButtonGroup>
#include <QtWidgets/QDialog>
#include <QtWidgets/QHeaderView>
#include <QtWidgets/QPushButton>
#include <QtWidgets/QVBoxLayout>
#include <QtWidgets/QWidget>

QT_BEGIN_NAMESPACE

class Ui_MySecondQtProjectClass
{
public:
    QPushButton *pushOK;
    QWidget *layoutWidget;
    QVBoxLayout *verticalLayout;
    QPushButton *pushImage;
    QPushButton *pushClassifier;

    void setupUi(QDialog *MySecondQtProjectClass)
    {
        if (MySecondQtProjectClass->objectName().isEmpty())
            MySecondQtProjectClass->setObjectName(QStringLiteral("MySecondQtProjectClass"));
        MySecondQtProjectClass->resize(600, 272);
        pushOK = new QPushButton(MySecondQtProjectClass);
        pushOK->setObjectName(QStringLiteral("pushOK"));
        pushOK->setGeometry(QRect(290, 220, 91, 31));
        layoutWidget = new QWidget(MySecondQtProjectClass);
        layoutWidget->setObjectName(QStringLiteral("layoutWidget"));
        layoutWidget->setGeometry(QRect(200, 100, 181, 91));
        verticalLayout = new QVBoxLayout(layoutWidget);
        verticalLayout->setSpacing(6);
        verticalLayout->setContentsMargins(11, 11, 11, 11);
        verticalLayout->setObjectName(QStringLiteral("verticalLayout"));
        verticalLayout->setContentsMargins(0, 0, 0, 0);
        pushImage = new QPushButton(layoutWidget);
        pushImage->setObjectName(QStringLiteral("pushImage"));

        verticalLayout->addWidget(pushImage);

        pushClassifier = new QPushButton(layoutWidget);
        pushClassifier->setObjectName(QStringLiteral("pushClassifier"));

        verticalLayout->addWidget(pushClassifier);


        retranslateUi(MySecondQtProjectClass);
        QObject::connect(pushImage, SIGNAL(clicked()), MySecondQtProjectClass, SLOT(on_pushImage_clicked()));
        QObject::connect(pushClassifier, SIGNAL(clicked()), MySecondQtProjectClass, SLOT(on_pushClassifier_clicked()));
        QObject::connect(pushOK, SIGNAL(clicked()), MySecondQtProjectClass, SLOT(on_pushOK_clicked()));

        QMetaObject::connectSlotsByName(MySecondQtProjectClass);
    } // setupUi

    void retranslateUi(QDialog *MySecondQtProjectClass)
    {
        MySecondQtProjectClass->setWindowTitle(QApplication::translate("MySecondQtProjectClass", "MySecondQtProject", 0));
        pushOK->setText(QApplication::translate("MySecondQtProjectClass", "OK", 0));
        pushImage->setText(QApplication::translate("MySecondQtProjectClass", "Browse for the Image", 0));
        pushClassifier->setText(QApplication::translate("MySecondQtProjectClass", "Browse for the classifier", 0));
    } // retranslateUi

};

namespace Ui {
    class MySecondQtProjectClass: public Ui_MySecondQtProjectClass {};
} // namespace Ui

QT_END_NAMESPACE

#endif // MYSECONDQTPROJECTHP7256_H

现在，代码为另一个errordialog：

/********************************************************************************
** Form generated from reading UI file 'showerrordialogmU7256.ui'
**
** Created by: Qt User Interface Compiler version 5.4.1
**
** WARNING! All changes made in this file will be lost when recompiling UI file!
********************************************************************************/

#ifndef SHOWERRORDIALOGMU7256_H
#define SHOWERRORDIALOGMU7256_H

#include <QtCore/QVariant>
#include <QtWidgets/QAction>
#include <QtWidgets/QApplication>
#include <QtWidgets/QButtonGroup>
#include <QtWidgets/QDialog>
#include <QtWidgets/QHeaderView>
#include <QtWidgets/QLabel>

QT_BEGIN_NAMESPACE

class Ui_ShowErrorDialog
{
public:
    QLabel *label;

    void setupUi(QDialog *ShowErrorDialog)
    {
        if (ShowErrorDialog->objectName().isEmpty())
            ShowErrorDialog->setObjectName(QStringLiteral("ShowErrorDialog"));
        ShowErrorDialog->resize(400, 65);
        label = new QLabel(ShowErrorDialog);
        label->setObjectName(QStringLiteral("label"));
        label->setGeometry(QRect(70, 20, 241, 21));

        retranslateUi(ShowErrorDialog);

        QMetaObject::connectSlotsByName(ShowErrorDialog);
    } // setupUi

    void retranslateUi(QDialog *ShowErrorDialog)
    {
        ShowErrorDialog->setWindowTitle(QApplication::translate("ShowErrorDialog", "ShowErrorDialog", 0));
        label->setText(QApplication::translate("ShowErrorDialog", "Please properly select the Image or the classifier", 0));
    } // retranslateUi

};

namespace Ui {
    class ShowErrorDialog: public Ui_ShowErrorDialog {};
} // namespace Ui

QT_END_NAMESPACE

#endif // SHOWERRORDIALOGMU7256_H

主Cpp文件的代码

#include "mysecondqtproject.h"
#include "showerrordialog.h"
#include <QFileDialog>

#include "objectdetect.h"

MySecondQtProject::MySecondQtProject(QWidget *parent)
    : QDialog(parent)
{
    ui.setupUi(this);
}

MySecondQtProject::~MySecondQtProject()
{

}

void MySecondQtProject::on_pushImage_clicked()
{
    image =
        QFileDialog::getOpenFileName(this, tr("open file"), "C:/Users/mankum93/Documents/Visual Studio 2013/Projects/BananaClassifierOpenCV/BananaClassifierOpenCV",
        "Images (*.png *.xpm *.jpg)");
}

void MySecondQtProject::on_pushClassifier_clicked()
{
    classifier =
        QFileDialog::getOpenFileName(this, tr("open file"), "C:/Users/mankum93/Documents/Visual Studio 2013/Projects/BananaClassifierOpenCV/BananaClassifierOpenCV",
        "XML files (*.xml)");
}

void MySecondQtProject::on_pushOK_clicked()
{
    accept();

    //Now lets compare for invalidity of any string:
    if (image.isNull() || classifier.isNull())
    {
        ShowErrorDialog dialog(this);
        dialog.exec();
    }
    else
    {
        //Convert Qstring to std::string
        String imageFileName = image.toLocal8Bit().constData();
        String cascadeFileName = classifier.toLocal8Bit().constData();

        // Now, we can go to main detection logic
        detectObject(imageFileName, cascadeFileName);
    }
}

编辑3：以下是您可能希望看到的其他有用文件

/********************************************************************************
** Form generated from reading UI file 'mysecondqtproject.ui'
**
** Created by: Qt User Interface Compiler version 5.4.1
**
** WARNING! All changes made in this file will be lost when recompiling UI file!
********************************************************************************/

#ifndef UI_MYSECONDQTPROJECT_H
#define UI_MYSECONDQTPROJECT_H

#include <QtCore/QVariant>
#include <QtWidgets/QAction>
#include <QtWidgets/QApplication>
#include <QtWidgets/QButtonGroup>
#include <QtWidgets/QDialog>
#include <QtWidgets/QHeaderView>
#include <QtWidgets/QPushButton>
#include <QtWidgets/QVBoxLayout>
#include <QtWidgets/QWidget>

QT_BEGIN_NAMESPACE

class Ui_MySecondQtProjectClass
{
public:
    QPushButton *pushOK;
    QWidget *layoutWidget;
    QVBoxLayout *verticalLayout;
    QPushButton *pushImage;
    QPushButton *pushClassifier;

    void setupUi(QDialog *MySecondQtProjectClass)
    {
        if (MySecondQtProjectClass->objectName().isEmpty())
            MySecondQtProjectClass->setObjectName(QStringLiteral("MySecondQtProjectClass"));
        MySecondQtProjectClass->resize(600, 272);
        pushOK = new QPushButton(MySecondQtProjectClass);
        pushOK->setObjectName(QStringLiteral("pushOK"));
        pushOK->setGeometry(QRect(290, 220, 91, 31));
        layoutWidget = new QWidget(MySecondQtProjectClass);
        layoutWidget->setObjectName(QStringLiteral("layoutWidget"));
        layoutWidget->setGeometry(QRect(200, 100, 181, 91));
        verticalLayout = new QVBoxLayout(layoutWidget);
        verticalLayout->setSpacing(6);
        verticalLayout->setContentsMargins(11, 11, 11, 11);
        verticalLayout->setObjectName(QStringLiteral("verticalLayout"));
        verticalLayout->setContentsMargins(0, 0, 0, 0);
        pushImage = new QPushButton(layoutWidget);
        pushImage->setObjectName(QStringLiteral("pushImage"));

        verticalLayout->addWidget(pushImage);

        pushClassifier = new QPushButton(layoutWidget);
        pushClassifier->setObjectName(QStringLiteral("pushClassifier"));

        verticalLayout->addWidget(pushClassifier);


        retranslateUi(MySecondQtProjectClass);
        QObject::connect(pushImage, SIGNAL(clicked()), MySecondQtProjectClass, SLOT(on_pushImage_clicked()));
        QObject::connect(pushClassifier, SIGNAL(clicked()), MySecondQtProjectClass, SLOT(on_pushClassifier_clicked()));
        QObject::connect(pushOK, SIGNAL(clicked()), MySecondQtProjectClass, SLOT(on_pushOK_clicked()));

        QMetaObject::connectSlotsByName(MySecondQtProjectClass);
    } // setupUi

    void retranslateUi(QDialog *MySecondQtProjectClass)
    {
        MySecondQtProjectClass->setWindowTitle(QApplication::translate("MySecondQtProjectClass", "MySecondQtProject", 0));
        pushOK->setText(QApplication::translate("MySecondQtProjectClass", "OK", 0));
        pushImage->setText(QApplication::translate("MySecondQtProjectClass", "Browse for the Image", 0));
        pushClassifier->setText(QApplication::translate("MySecondQtProjectClass", "Browse for the classifier", 0));
    } // retranslateUi

};

namespace Ui {
    class MySecondQtProjectClass: public Ui_MySecondQtProjectClass {};
} // namespace Ui

QT_END_NAMESPACE

#endif // UI_MYSECONDQTPROJECT_H

第二个：

/********************************************************************************
** Form generated from reading UI file 'showerrordialog.ui'
**
** Created by: Qt User Interface Compiler version 5.4.1
**
** WARNING! All changes made in this file will be lost when recompiling UI file!
********************************************************************************/

#ifndef UI_SHOWERRORDIALOG_H
#define UI_SHOWERRORDIALOG_H

#include <QtCore/QVariant>
#include <QtWidgets/QAction>
#include <QtWidgets/QApplication>
#include <QtWidgets/QButtonGroup>
#include <QtWidgets/QDialog>
#include <QtWidgets/QHeaderView>
#include <QtWidgets/QLabel>

QT_BEGIN_NAMESPACE

class Ui_ShowErrorDialog
{
public:
    QLabel *label;

    void setupUi(QDialog *ShowErrorDialog)
    {
        if (ShowErrorDialog->objectName().isEmpty())
            ShowErrorDialog->setObjectName(QStringLiteral("ShowErrorDialog"));
        ShowErrorDialog->resize(400, 65);
        label = new QLabel(ShowErrorDialog);
        label->setObjectName(QStringLiteral("label"));
        label->setGeometry(QRect(70, 20, 241, 21));

        retranslateUi(ShowErrorDialog);

        QMetaObject::connectSlotsByName(ShowErrorDialog);
    } // setupUi

    void retranslateUi(QDialog *ShowErrorDialog)
    {
        ShowErrorDialog->setWindowTitle(QApplication::translate("ShowErrorDialog", "ShowErrorDialog", 0));
        label->setText(QApplication::translate("ShowErrorDialog", "Please properly select the Image or the classifier", 0));
    } // retranslateUi

};

namespace Ui {
    class ShowErrorDialog: public Ui_ShowErrorDialog {};
} // namespace Ui

QT_END_NAMESPACE

#endif // UI_SHOWERRORDIALOG_H

0 个答案:

没有答案
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