Simple Qt Test 2

dialog.cpp

#include <QtGui>
#include "dialog.h"

Dialog::Dialog(QWidget *parent) : QDialog(parent) {
    label = new QLabel(tr("Find &what"));
    lineEdit = new QLineEdit;
    label->setBuddy(lineEdit);

    caseCheckBox = new QCheckBox(tr("Case &sensitive"));
    backwardCheckBox = 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(findButton, SIGNAL(clicked()), this, SLOT(clickFindButton()));
    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(backwardCheckBox);

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

    QHBoxLayout *mainLayout = new QHBoxLayout;
    mainLayout->addLayout(leftLayout);
    mainLayout->addLayout(rightLayout);

    setWindowTitle("Searching Dialog");
    setLayout(mainLayout);
}

void Dialog::clickFindButton() {
    QString text = lineEdit->text();
    Qt::CaseSensitivity cs = caseCheckBox->isChecked() ? Qt::CaseSensitive : Qt::CaseInsensitive;
    if (backwardCheckBox->isChecked()) emit findPrevious(text, cs);
    else emit findNext(text, cs);
}

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

dialog.h

#ifndef DIALOG_H
#define DIALOG_H
#include <QDialog>
#include <QLabel>
#include <QLineEdit>
#include <QCheckBox>
#include <QPushButton>
#include <QHBoxLayout>

class Dialog : public QDialog {
    Q_OBJECT
public:
    explicit Dialog(QWidget *parent = 0);
signals:
    void findNext(const QString &str, Qt::CaseSensitivity cs);
    void findPrevious(const QString &str, Qt::CaseSensitivity cs);
private slots:
    void clickFindButton();
    void enableFindButton(const QString &text);
private:
    QLabel *label;
    QLineEdit *lineEdit;
    QCheckBox *caseCheckBox;
    QCheckBox *backwardCheckBox;
    QPushButton *findButton;
    QPushButton *closeButton;
};

#endif

main.cpp

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

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

    Dialog dialog;
    dialog.show();

    return application.exec();
}