QT 学习记录 一(FINDDIALOG)
本帖最后由 飞凌-unix 于 2012-11-30 15:33 编辑#ifndef FINDDIALOG_H
#define FINDDIALOG_H
#include<QDialog>
class QCheckBox;
class QLabel;
class QLineEdit;
class QPushButton;
/*****************************************************
声明一些用于这个对话框实现中的Qt类
*****************************************************/
class FindDialog :public QDialog
{
Q_OBJECT
public:
FindDialog(QWidget *parent =0);
//FindDialog的构造函数是一个典型的Qt窗口部件类的定义方式。parent参数指定了它的父窗口部件。
signals:
void findNext(const QString &str,Qt::CaseSensitivity cs);
void findPrevious(const QString &str,Qt::CaseSensitivity cs);
//signals声明了当用户单击Find按钮时对话框所发射的两个信号。
private:
QLabel *label;
QLineEdit *lineEdit;
QCheckBox *caseCheckBox;
QCheckBox *backwardCheckBox;
QPushButton *findButton;
QPushButton *closeButton;
};
#endif // FINDDIALOG_H
#include<QtGui>
#include"finddialog.h"
FindDialog ::FindDialog(QWidget*parent):QDialog(parent)
{
//parent参数传递给了基类的构造函数
label=new QLabel(tr("Find &what:"));
lineEdit=new QLineEdit;
label->setBuddy(lineEdit);
caseCheckBox=new QCheckBox(tr("Match &case"));
backwardCheckBox=new QCheckBox(tr("serch &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());
}
#include<QApplication>
#include"finddialog.h"
int main(int argc,char *argv[])
{
QApplication app(argc,argv);
FindDialog *dialog= new FindDialog;
dialog->show();
return app.exec();
}
今天写了一个QT程序大家一起看看代码,看看问题,分享下 学习。
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