www.pudn.com > chap03.rar > finddialog.cpp

#include  
 
#include "finddialog.h" 
 
FindDialog::FindDialog(QWidget *parent) 
    : QDialog(parent) 
{ 
    label = new QLabel(tr("Find &what:")); 
    lineEdit = new QLineEdit; 
    label->setBuddy(lineEdit); 
 
    caseCheckBox = new QCheckBox(tr("Match &case")); 
    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(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(backwardCheckBox); 
 
    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 (backwardCheckBox->isChecked()) { 
        emit findPrevious(text, cs); 
    } else { 
        emit findNext(text, cs); 
    } 
} 
 
void FindDialog::enableFindButton(const QString &text) 
{ 
    findButton->setEnabled(!text.isEmpty()); 
}