Hi
I 'm a beginner in QT.
My class's slots in my code do not work!!
test.cpp:
#include <QHBoxLayout>
#include <QVBoxLayout>
#include "test.h"
{
label
= new QLabel(tr
("Find &what:"));
label->setBuddy(lineEdit);
caseCheckBox
= new QCheckBox(tr
("Mach &case"));
backwardCheckBox
= new QCheckBox(tr
("Search &backward"));
findButton->setDefault(true);
findButton->setEnabled(false);
connect(lineEdit,
SIGNAL(textChanged
(const QString &)),
this,
SLOT(this
->enableFindButton
(const QString &)));
connect(findButton , SIGNAL(clicked()),this,SLOT(this->findClicked()));
connect(closeButton,SIGNAL(clicked()),this,SLOT(close()));
topLeftLayout->addWidget(label);
topLeftLayout->addWidget(lineEdit);
leftLayout->addLayout(topLeftLayout);
leftLayout->addWidget(caseCheckBox);
leftLayout->addWidget(backwardCheckBox);
rightLayout->addWidget(findButton);
rightLayout->addWidget(closeButton);
rightLayout->addStretch();
mainLayout->addLayout(leftLayout);
mainLayout->addLayout(rightLayout);
setLayout(mainLayout);
setWindowTitle(tr("Search"));
setFixedHeight(sizeHint().height());
}
void FindDialog::findClicked()
{
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());
}
#include <QHBoxLayout>
#include <QVBoxLayout>
#include "test.h"
FindDialog::FindDialog( QWidget *parent): QDialog(parent)
{
label = new QLabel(tr("Find &what:"));
lineEdit = new QLineEdit;
label->setBuddy(lineEdit);
caseCheckBox = new QCheckBox(tr("Mach &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(this->enableFindButton(const QString &)));
connect(findButton , SIGNAL(clicked()),this,SLOT(this->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("Search"));
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());
}
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test.h:
#ifndef FINDDIALOG_H
#define FINDDIALOG_H
#include <QtGui>
#include <QDialog>
#include <QCheckBox>
#include <QLabel>
#include <QLineEdit>
#include <QPushButton>
{
Q_OBJECT
public :
signals:
void findNext
(const QString &str , Qt
::CaseSensitivity cs
);
void findPrevious
(const QString &str , Qt
::CaseSensitivity cs
);
private:
private slots:
void findClicked();
void enableFindButton
(const QString &text
);
};
#endif
#ifndef FINDDIALOG_H
#define FINDDIALOG_H
#include <QtGui>
#include <QDialog>
#include <QCheckBox>
#include <QLabel>
#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 findPrevious(const QString &str , Qt::CaseSensitivity cs);
private:
QLabel *label;
QLineEdit *lineEdit;
QCheckBox *caseCheckBox;
QCheckBox *backwardCheckBox;
QPushButton *findButton;
QPushButton *closeButton;
private slots:
void findClicked();
void enableFindButton(const QString &text);
};
#endif
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main.cpp:
#include <QApplication>
#include "test.h"
int main(int argc,char *argv[])
{
FindDialog *fd = new FindDialog;
fd->show();
return app.exec();
}
#include <QApplication>
#include "test.h"
int main(int argc,char *argv[])
{
QApplication app(argc,argv);
FindDialog *fd = new FindDialog;
fd->show();
return app.exec();
}
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Please help me about this.
Thanks
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