基于QT记事本源代码.doc

基于QT记事本源代码dialog.h#include mainwindow.h#ifndef DIALOG_H#define DIALOG_H#include namespace Ui class Dialog;class Dialog : public QDialog Q_OBJECTpublic: explicit Dialog(QWidget *parent = 0); Dialog();private slots: void on_buttonBox_clicked(QAbstractButton *button); void on_pushButton_clicked(); void on_pushButton_2_clicked(); void on_pushButton_3_clicked();private: Ui:Dialog *ui;#endif / DIALOG_Hmainwindow.h#ifndef MAINWINDOW_H#define MAINWINDOW_H#include #include #include #include #include #include #include #include #include #include #include #include #include namespace Ui class MainWindow;class MainWindow : public QMainWindow Q_OBJECTpublic: explicit MainWindow(QWidget *parent = 0); MainWindow();private: Ui:MainWindow *ui;private slots: void newFileSlot();/ nfs() void openFileSlot(); / open a text file void saveFileSlot(); void setColorSlot(); void setFontSlot(); void setDateTimeSlot(); void aboutSoftSlot(); void aboutWebSiteSlot(); void on_actionAa_destroyed(QObject *arg1); void on_actionS_4_triggered(); void on_actionAa_triggered(); void on_actionA_triggered();#endif / MAINWINDOW_Hnew_datebase.h#ifndef NEW_DATEBASE_H#define NEW_DATEBASE_H#include QWidget#include qsql.h#include QSqlDatabase#include QSqlQuery#include QSqlQueryModel#include QDebug#include #include QSqlDrivernamespace Ui class new_datebase;class new_datebase : public QDialog Q_OBJECTpublic: explicit new_datebase(QWidget *parent = 0); new_datebase();private slots: void on_pushButton_clicked(); void on_lineEdit_editingFinished();private: Ui:new_datebase *ui; bool connectDB();#endif / NEW_DATEBASE_Hdialog.cpp#include new_datebase.h#include dialog.h#include mainwindow.h#include ui_dialog.h#include QtSql#include Dialog:Dialog(QWidget *parent) : QDialog(parent), ui(new Ui:Dialog) ui-setupUi(this);Dialog:Dialog() delete ui;void Dialog:on_pushButton_clicked() MainWindow *m = new MainWindow(); m-show();void Dialog:on_pushButton_2_clicked() QSqlDatabase database = QSqlDatabase:addDatabase(QSQLITE); database.setDatabaseName(C:UsersAdministratorDesktoptext/aaa.db);/必须用绝对路径，不知道为什么 database.open(); QSqlQuery query; QString ss,qq,s,q; q = ui-lineEdit_2-text();query.exec(select * from bb where 账号 = + ui-lineEdit-text() );query.next();qq = query.value(1).toString().trimmed();qDebug()show(); database.close();void Dialog:on_pushButton_3_clicked() this-close();main.cpp#include dialog.h#include mainwindow.h#include #include qsqlquery.h#include QDebug#include QSqlDatabase#include iostream#include QList#include iostream#include windows.h#include shellapi.h#include QSqlDriver#include QDebug#include QSqlQueryModel#include QSqlQuery#include qsql.h#include QWidgetusing namespace std;int main(int argc, char *argv) QApplication a(argc, argv); MainWindow w; w.show(); QSqlQueryModel *model = new QSqlQueryModel; QSqlDatabase db = QSqlDatabase:addDatabase(QSQLITE); db.setDatabaseName(C:UsersAdministratorDesktopnew one/textfile.db); bool ku = db.open(); Widge w; if(ku) model-setQuery(select * from textfile); model-setQuery(insert int student values(1,a); w.show(); else qDebug()setupUi(this); QObject:connect(ui-actionSs,SIGNAL(triggered(),this,SLOT(newFileSlot(); QObject:connect(ui-actionSs_2,SIGNAL(triggered(),this,SLOT(openFileSlot(); QObject:connect(ui-actionA,SIGNAL(triggered(),this,SLOT(saveFileSlot(); QObject:connect(ui-actionSs_8,SIGNAL(triggered(),this,SLOT(close(); QObject:connect(ui-actionSs_5,SIGNAL(triggered(),ui-textEdit,SLOT(copy(); QObject:connect(ui-actionSs_4,SIGNAL(triggered(),ui-textEdit,SLOT(undo(); QObject:connect(ui-actionSs_9,SIGNAL(triggered(),ui-textEdit,SLOT(paste(); QObject:connect(ui-actionS_2,SIGNAL(triggered(),ui-textEdit,SLOT(selectAll(); QObject:connect(ui-actionSs_10,SIGNAL(triggered(),ui-textEdit,SLOT(cut(); QObject:connect(ui-actionSdf,SIGNAL(triggered(),this,SLOT(setFontSlot(); QObject:connect(ui-actionS_3,SIGNAL(triggered(),this,SLOT(on_actionAa_destroyed(); /set current date time slot QObject:connect(ui-actionS,SIGNAL(triggered(),this,SLOT(setDateTimeSlot(); QObject:connect(ui-actionSs_12,SIGNAL(triggered(),this,SLOT(aboutSoftSlot(); QObject:connect(ui-actionAa,SIGNAL(triggered(),this,SLOT(aboutSoftSlot(); /QObject:connect(ui-aboutQtAction,SIGNAL(triggered(),qApp,SLOT(aboutQt(); / QObject:connect(ui-编辑,SIGNAL(triggered(),ui-textEdit,SLOT(redo();MainWindow:MainWindow() delete ui;void MainWindow:newFileSlot() /clear the text edit ui-textEdit-clear(); this-setWindowTitle(untitled-notepad );void MainWindow:openFileSlot() QString fileName=QFileDialog:getOpenFileName(this,Open Text File,QDir:currentPath(); if(fileName.isEmpty() return ; QFile *file =new QFile; file-setFileName(fileName); /boolean bool ok=file-open(QIODevice:ReadOnly); /if file open error if(ok) QTextStream in(file); ui-textEdit-setText(in.readAll(); file-close(); delete file; file=NULL; else QMessageBox:information(this,Error Message,Cant open File); delete file; return; void MainWindow:saveFileSlot() QString fileName=QFileDialog:getSaveFileName(this,Save Text File,QDir:currentPath(); if(fileName.isEmpty() return; QFile *file =new QFile; /must set a file name file-setFileName(fileName); bool ok=file-open(QIODevice:WriteOnly); if(ok) QTextStream out(file); outtextEdit-toPlainText(); file-close(); delete file; file=NULL; else QMessageBox:information(this,Error Message ,Save File Error ); delete file; file=NULL; return; void MainWindow:setFontSlot() bool ok; QFont font = QFontDialog:getFont( &ok, QFont(Helvetica Cronyx, 10), this); if (ok) ui-textEdit-setFont(font); / the user clicked OK and font is set to the font the user selected else / the user canceled the dialog; font is set to the initial / value, in this case Helvetica Cronyx, 10 QMessageBox:information(this,Error Message,Please Select a Font); return ; void MainWindow:setColorSlot() /* QColor color; if (native-isChecked() color = QColorDialog:getColor(Qt:green, this); else color = QColorDialog:getColor(Qt:green, this, Select Color, QColorDialog:DontUseNativeDialog); if (color.isValid() colorLabel-setText((); colorLabel-setPalette(QPalette(color); colorLabel-setAutoFillBackground(true); */ QColor color=QColorDialog:getColor(Qt:green, this); if(color.isValid() ui-textEdit-setTextColor(color); else QMessageBox:information(this,Error message,Please Select correct color); return ; void MainWindow:setDateTimeSlot() QDateTime current=QDateTime:currentDateTime(); ui-textEdit-append(current.toString(yyyy-MM-dd hh-mm-ss);void MainWindow:aboutWebSiteSlot() QDesktopServices:openUrl(QUrl();void MainWindow:on_actionS_4_triggered() Dialog * m = new Dialog; m-show();void MainWindow:on_actionA_triggered() QString sFilePath = D:test.txt; QFile file(sFilePath); /方式：Append为追加，WriteOnly，ReadOnly if (!file.open(QIODevice:WriteOnly|QIODevice:Text) QMessageBox:critical(NULL, 提示, 无法创建文件); QTextStream out(&file); out要写入内容endl; out.flush(); file.close(); /*QSqlDatabase db = QSqlDatabase:addDatabase(QSQLITE); /添加数据库驱动 db.setDatabaseName(C:UsersAdministratorDesktoptext/aaa.db); /数据库连接命名 if(!db.open() /打开数据库 QSqlQuery query; query.exec(select * from bb ); query.exec(insert into textfile values(1,q,1456); file.close();*/new_datebase.cpp#include new_datebase.h#include dialog.h#include mainwindow.h#include new_datebase.h#include ui_new_datebase.h#include QtSql#include QFile#include QtGui#include #include QSqlDatabase#include iostream#include QList#include iostream#include windows.h#include shellapi.hbool connectDB() QSqlDatabase db = QSqlDatabase:addDatabase(QSQLITE); db.setDatabaseName(textfile.txt); if(!db.open() return false; else return true; new_datebase:new_datebase(QWidget *parent) : QDialog(parent),ui(new Ui:new_datebase) ui-setupUi(this); QSqlDatabase db = QSqlDatabase:addDatabase(QSQLITE); db.setDatabaseName(C:UsersAdministratorDesktoptext/aaa.db); db.open(); QSqlQuery query; while(query.next() QString name=query.value(0).toString(); QString ppth = query.value(1).toString(); QString Num = query.value(2).toString(); QListWidgetItem *q =new QListWidgetItem(name); QListWidgetItem *v =new QListWidgetItem(ppth); QListWidgetItem *b =new QListWidgetItem(Num); ui-listWidget-addItem(q); ui-listWidget-addItem(v); ui-listWidget-addItem(b); QList list =ui-listWidget-