C++ GUI Programming With Qt4 书中的一个程序
FindDialog.h
#ifndef FINDDIALOG_H_
#define FINDDIALOG_H_
#include <qdialog>
#include <qlabel>
#include <qlineedit>
#include <qcheckbox>
#include <qpushbutton>
class FindDialog: public QDialog {
public:
FindDialog(QWidget *parent = 0);
virtual ~FindDialog();
signals:
void findNext(const QString &str, Qt::CaseSensitivity cs);
void findPrevious(const QString &str, Qt::CaseSensitivity cs);
private slots:
void findChecked();
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(findChecked()));
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("Find");
setFixedHeight(sizeHint().height());
}
FindDialog::~FindDialog() {
}
void FindDialog::findChecked() {
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());
}
C:/Documents and Settings/Owner/My Documents/findDialog/findDialog.cpp:46: error: `findPrevious' was not declared in this scope
C:/Documents and Settings/Owner/My Documents/findDialog/findDialog.cpp:46: warning: unused variable 'findPrevious'
C:/Documents and Settings/Owner/My Documents/findDialog/findDialog.cpp:50: error: `findNext' was not declared in this scope
求各位帮忙解决一下~
