Find对话框实现 平台 Qt5.3.2 MinGW4.8.2
注意创建时用QDialog
finddialog.h
#ifndef FINDDIALOG_H #define FINDDIALOG_H #include <QDialog> #include <QLabel> #include <QCheckBox> #include <QLineEdit> #include <QPushButton> #include <QLayout> class FindDialog : public QDialog { Q_OBJECT public: FindDialog(QWidget * parent = 0); signals: void findNext(const QString &str, Qt::CaseSensitivity cs); void findPrevious(const QString &str, Qt::CaseSensitivity cs); private slots: void findClicked(); void enableFindButton(const QString &text); private: QLabel * label; QLineEdit * lineEdit; QCheckBox * caseCheckBox; QCheckBox * backwardCheckBox; QPushButton * findButton; QPushButton * closeButton; }; #endif // FINDDIALOG_H
finddialog.cpp
#include <QtGui> #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()); }
mian.cpp
#include "finddialog.h" #include <QApplication> int main(int argc, char *argv[]) { QApplication a(argc, argv); FindDialog *dialog = new FindDialog; dialog->show(); return a.exec(); }