QT学习笔记之二 FindDialog

 创建一个FindDialog，功能还没有添加...以后再搞吧

 

代码：

findDialog.h

#ifndef FINDDIALOG_H#define FINDDIALOG_H#include <QtGui/QDialog>#include<QCheckBox>#include<QLabel>#include<QLineEdit>#include<QPushButton>namespace Ui{ class FindDialogClass;}class FindDialog : public QDialog{ Q_OBJECTpublic: FindDialog(QWidget *parent = 0); ~FindDialog();signals: void findNext(const QString &str,Qt::CaseSensitivity cs); //不要写成 Qt::CaseSensitive,Qt::CaseSensitivity是一个类型 void findPrev(const QString &str,Qt::CaseSensitivity cs);private slots: void findClicked(); void enableFindButton(const QString &text);private: Ui::FindDialogClass *ui; QLabel *label; QLineEdit *lineEdit; QCheckBox *caseCheckBox; QCheckBox *backwardCheckBox; QPushButton *findButton; QPushButton *closeButton;};#endif // FINDDIALOG_H

 

findDialog.cpp

#include<QtGui>#include<QHBoxLayout>#include "finddialog.h"#include "ui_finddialog.h"FindDialog::FindDialog(QWidget *parent) : QDialog(parent), ui(new Ui::FindDialogClass){ ui->setupUi(this); //对部件进行定义 label=new QLabel(tr("&Input the word you want to find")); lineEdit=new QLineEdit(); label->setBuddy(lineEdit); //setBuddy 当按下快捷键时，转换到lineEdit caseCheckBox=new QCheckBox(tr("Match &Case")); backwardCheckBox=new QCheckBox(tr("Search &backward")); findButton=new QPushButton(tr("Find")); closeButton=new QPushButton(tr("Close")); //添加信号连接 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())); //布局控制 QHBoxLayout *topLeftLayout=new QHBoxLayout; topLeftLayout->addWidget(label); topLeftLayout->addWidget(lineEdit); QVBoxLayout *leftLayout=new QVBoxLayout; leftLayout->addLayout(topLeftLayout); //添加topLeftLayout层到leftLayout层上 leftLayout->addWidget(caseCheckBox); leftLayout->addWidget(backwardCheckBox); QVBoxLayout *rightLayout=new QVBoxLayout; rightLayout->addWidget(findButton); rightLayout->addWidget(closeButton); rightLayout->addStretch(); //添加延展 //设置mianLayout将leftLayout和rightLayout添加到上面 QHBoxLayout *mainLayout=new QHBoxLayout; mainLayout->addLayout(leftLayout); mainLayout->addLayout(rightLayout); this->setLayout(mainLayout); this->setWindowTitle(tr("Find")); this->setFixedHeight(sizeHint().height());}FindDialog::~FindDialog(){ delete ui;}void FindDialog::findClicked(){ QString text=lineEdit->text(); Qt::CaseSensitivity cs=caseCheckBox->isChecked()?Qt::CaseSensitive : Qt::CaseInsensitive; if(backwardCheckBox->isChecked()) emit findPrev(text,cs); //emit用于发射信号 else emit findNext(text,cs);}void FindDialog::enableFindButton(const QString &text){ findButton->setEnabled(!text.isEmpty());}

main.cpp

#include <QtGui/QApplication>#include "finddialog.h"int main(int argc, char *argv[]){ QApplication app(argc, argv); FindDialog *findDialog=new FindDialog; findDialog->show(); return app.exec();}

 

运行结果：

 

=========================================================================

 

PS：编译过程出现这个错误：:-1: error: collect2: ld returned 1 exit status，但是当我程序写完的时候问题就解决了….orz，顺便说下，QtCreator的补全功能还是很不错的....1.0果然比0.9好太多了....赞一个