third_project

cpp

#include <QtGui>
#include <QLabel>
#include <QCheckBox>
#include <QPushButton>
#include "finddialog.h"
#include <QtWidgets/QHBoxLayout>

FindDialog::FindDialog(QWidget *parent) : QDialog(parent) {

    label = new QLabel(tr("Find &what:"));
    lineEdit = new QLineEdit;
    label->setBuddy(lineEdit);

    caseCheckBox = new QCheckBox(tr("Match &case"));
    backwardChechBox = new QCheckBox(tr("Search backward"));

    findButton = new QPushButton(tr("&Find"));
    findButton->setDefault(true);
    findButton->setEnabled(false);

    closeButton = new QPushButton(tr("Close"));


    connect(lineEdit,SIGNAL(textChanged(const QString &)),
            this,SLOT(enableFindButton(const QString &)));

    connect(lineEdit,SIGNAL(textChanged(const QString &)),this, SLOT(enableFindButton(const QString &)));
    connect(findButton, SIGNAL(clicked()),this, SLOT(findClicked()));
    connect(closeButton, SIGNAL(clicked()), this, SLOT(close()));

    QHBoxLayout* topLeftLayout = new QHBoxLayout;
    topLeftLayout->addWidget(label);
    topLeftLayout->addWidget(lineEdit);

    QVBoxLayout* leftLayout = new QVBoxLayout;
    leftLayout->addLayout(topLeftLayout);
    leftLayout->addWidget(caseCheckBox);
    leftLayout->addWidget(backwardChechBox);

    QVBoxLayout* rightLayout = new QVBoxLayout;
    rightLayout->addWidget(findButton);
    rightLayout->addWidget(closeButton);
    rightLayout->addStretch();

    QHBoxLayout *mainLayout = new QHBoxLayout;
    mainLayout->addLayout(leftLayout);
    mainLayout->addLayout(rightLayout);
    setLayout(mainLayout);
    setWindowTitle(tr("Find"));
    setFixedHeight(sizeHint().height());
}

void FindDialog::findClicked() {
    QString text = lineEdit->text();
    Qt::CaseSensitivity  cs = caseCheckBox->isChecked() ? Qt::CaseSensitive : Qt::CaseInsensitive;

    if(backwardChechBox->isChecked()){
        emit findPrev(text, cs);
    } else{
       emit findNext(text,cs);
    }
}

void FindDialog::enableFindButton(const QString &text) {
    findButton->setEnabled(!text.isEmpty());
}

--------
h

#ifndef SECOND_PROGECT_FINDDIALOG_H
#define SECOND_PROGECT_FINDDIALOG_H

#include <QDialog>
#include <QLabel>
#include <QCheckBox>
#include <QLineEdit>
#include <QPushButton>

class FindDialog : public QDialog{
Q_OBJECT
public:
    FindDialog(QWidget *parent=0);
signals:
    void findNext(const QString &str, Qt::CaseSensitivity cs);
    void findPrev(const QString &str, Qt::CaseSensitivity cs);

private slots:
    void findClicked();
    void enableFindButton(const QString &text);

private:
    QLabel* label;
    QLineEdit* lineEdit;
    QCheckBox* caseCheckBox;
    QCheckBox* backwardChechBox;
    QPushButton* findButton;
    QPushButton* closeButton;
};

#endif


----
main


#include <QApplication>
#include "finddialog.h"

int main(int argc,char* argv[]) {

    QApplication app(argc,argv);
    FindDialog* dialog = new FindDialog;
    dialog->show();
    return  app.exec();
}