qt5.5实现 记事本程序

最近由于要做Qt相关的毕业设计课题，以前对Qt完全不了解，对于客户端图形界面程序，也只对Windows下的MFC熟悉，

所以，由于Qt的跨平台特性和相对比较纯的C++的特点，就准备学习一下吧。这两天逛了一下Qt的开发者官方网站，和一些国内的论坛，

看了下基本的知识点，比如信号和槽的机制，界面的布局，就想写个东西，巩固一下。于是参考了官方的文档和代码，纯代码实现了一个简易的记事本程序。

希望大家参考学习，共同进步。不足之处，还请指出。

记事本简介：记事本采用代码实现GUI界面，支持，新建，保存，另存为，查找，替换，打印功能。

开发环境：win7旗舰版 32位 Qt Creator   Qt 5.5

参考资料： http://www.devbean.net/2012/08/qt-study-road-2-intro

http://doc.qt.io/qt-5/gettingstartedqt.html

界面外观：

查找功能：

替换功能：

打印功能：

保存等：

关于本屌狮

本程序涉及一个主对话框，一个查找对话框，一个替换对话框，一个打印对话框，一个关于信息对话框，一个打开对话框，一个保存对话框，其他信息提示对话框。

功能设计：主要涉及对话框的布局，主对话框与查找，替换对话框的交互。当然这是通过信号与槽的机制来实现的。下面看下具体的代码实现。

主对话框类

1 #ifndef MAINWINDOW_H  2 #define MAINWINDOW_H  3   4 #include <QMainWindow>  5 #include <QMenu>  6 #include <QMenuBar>  7 #include <QAction>  8 #include <QTextEdit>  9 #include <QIcon> 10 #include <QFile> 11 #include <QFileDialog> 12 #include <QTextStream> 13 #include <QMessageBox> 14 #include <QTextDocument> 15 #include <QTextCursor> 16 #include <QToolBar> 17 #include <QtPrintSupport/QPrinter> 18 #include <QtPrintSupport/QPrintDialog> 19 #include <QtPrintSupport/QPrintPreviewDialog> 20 #include <QtPrintSupport/QPageSetupDialog> 21  22 #include <finddialog.h> 23  24 #include <replacedialog.h> 25  26 class MainWindow : public QMainWindow 27 { 28     Q_OBJECT 29 public: 30     MainWindow(QWidget *parent = 0); 31     ~MainWindow(); 32 protected: 33 private slots: 34     void createMenus(); 35     void createActions(); 36     void newAct(); 37     void openAct(); 38     void saveAct(); 39     void printAct(); 40     void exitAct(); 41     void findAct(QString,bool,bool); 42     void aboutAct(); 43     void anotherSaveAct(); 44     void showFindDialog(); 45     void showReplaceDialog(); 46     void findReplace(QString,bool); 47     void replaceCur(QString,QString); 48     void replaceAll(QString,QString,bool); 49  50 private: 51     //菜单 52     bool   find; 53     QMenu *file_menu; 54     QMenu *edit_menu; 55     QMenu *about_menu; 56     //Action响应file_menu 57     QAction *new_act; 58     QAction *open_act; 59     QAction *save_act; 60     QAction *another_save_act; 61     QAction *print_act; 62     QAction *exit_act; 63     //Action响应edit_menu 64     QAction *find_act; 65     QAction *replace_act; 66     //Action响应help_menu 67     QAction *about_act; 68     //Edit 69     QTextEdit *mini_text; 70  71     FindDialog *find_dialog; 72     ReplaceDialog *replace_dialog; 73     QString cur_file_name; 74  75 }; 76  77 #endif // MAINWINDOW_H

1 #include "mainwindow.h"   2 MainWindow::MainWindow(QWidget *parent)   3     : QMainWindow(parent)   4 {   5     setWindowTitle(tr("MiniText"));   6     mini_text = new QTextEdit;   7     this->setCentralWidget(mini_text);   8     resize(900,500);   9     cur_file_name = tr("");  10   11     createActions();  12     createMenus();  13 }  14   15 MainWindow::~MainWindow()  16 {  17    if(file_menu){  18        delete file_menu;  19    }  20    if(edit_menu){  21        delete edit_menu;  22    }  23    if(about_menu){  24        delete about_menu;  25    }  26    if(new_act){  27        delete new_act;  28    }  29    if(open_act){  30        delete open_act;  31    }  32    if(save_act){  33        delete save_act;  34    }  35    if(print_act){  36        delete print_act;  37    }  38    if(exit_act){  39        delete exit_act;  40   41    }  42    if(find_act){  43        delete find_act;  44   45    }  46    if(replace_act){  47        delete replace_act;  48    }  49    if(about_act){  50        delete about_act;  51    }  52    if(mini_text){  53        delete mini_text;  54    }  55    if(find_dialog){  56        delete find_dialog;  57    }  58    if(replace_dialog){  59        delete replace_dialog;  60    }  61    if(another_save_act){  62        delete another_save_act;  63    }  64 }  65   66 void MainWindow::createMenus()  67 {  68   69     file_menu = menuBar()->addMenu(tr("&文件"));  70     file_menu->setStyleSheet("color:blue");  71     file_menu->addAction(new_act);  72     file_menu->addAction(open_act);  73     file_menu->addAction(save_act);  74     file_menu->addAction(another_save_act);  75     file_menu->addAction(print_act);  76     file_menu->addSeparator();  77     file_menu->addAction(exit_act);  78     edit_menu = menuBar()->addMenu(tr("&编辑"));  79     edit_menu->setStyleSheet("color:blue");  80     edit_menu->addAction(find_act);  81     edit_menu->addAction(replace_act);  82     about_menu = menuBar()->addMenu(tr("&关于"));  83     about_menu->setStyleSheet("color:blue");  84     about_menu->addAction(about_act);  85     QToolBar *tool_bar = addToolBar(tr("file"));  86     tool_bar->addAction(new_act);  87     tool_bar->addAction(open_act);  88     tool_bar->addAction(save_act);  89     tool_bar->addAction(another_save_act);  90     tool_bar->addAction(print_act);  91     tool_bar->addAction(find_act);  92     tool_bar->addAction(replace_act);  93     tool_bar->addAction(about_act);  94     tool_bar->addAction(exit_act);  95   96 }  97   98 void MainWindow::createActions()  99 { 100     find = false; 101     find_dialog = new FindDialog(this); 102     replace_dialog = new ReplaceDialog(this); 103     //Action响应file_menu 104     new_act = new QAction(QIcon(tr(":/images/new")),tr("&新建"),this); 105     new_act->setShortcut(QKeySequence::New); 106  107     open_act = new QAction(QIcon(tr(":/images/open")),tr("&打开"),this); 108     open_act->setShortcut(QKeySequence::Open); 109  110     save_act = new QAction(QIcon(tr(":/images/save")),tr("&保存"),this); 111     save_act->setShortcut(QKeySequence::Save); 112  113     another_save_act = new QAction(QIcon(tr(":/images/another_save")),tr("另存为"),this); 114  115     print_act = new QAction(QIcon(tr(":/images/print")),tr("&打印"),this); 116     print_act->setShortcut(QKeySequence::Print); 117  118     exit_act = new QAction(QIcon(tr(":/images/exit")),tr("&退出"),this); 119     exit_act->setShortcut(QKeySequence::Quit); 120  121     find_act = new QAction(QIcon(tr(":/images/find")),tr("&查找"),this); 122     find_act->setShortcut(QKeySequence::Find); 123  124     replace_act = new QAction(QIcon(tr(":/images/replace")),tr("&替换"),this); 125     replace_act->setShortcut(QKeySequence::Replace); 126  127     about_act = new QAction(QIcon(tr(":/images/about")),tr("关于"),this); 128  129     connect(new_act,SIGNAL(triggered()),this,SLOT(newAct())); 130     connect(open_act,SIGNAL(triggered()),this,SLOT(openAct())); 131     connect(save_act,SIGNAL(triggered()),this,SLOT(saveAct())); 132     connect(print_act,SIGNAL(triggered()),this,SLOT(printAct())); 133     connect(another_save_act,SIGNAL(triggered()),this,SLOT(anotherSaveAct())); 134     connect(exit_act,SIGNAL(triggered()),this,SLOT(exitAct())); 135     connect(find_act,SIGNAL(triggered()),this,SLOT(showFindDialog())); 136     connect(replace_act,SIGNAL(triggered()),this,SLOT(showReplaceDialog())); 137     connect(about_act,SIGNAL(triggered()),this,SLOT(aboutAct())); 138  139     connect(find_dialog,SIGNAL(findTextDataButtonClickedSignal(QString,bool,bool)), 140             this,SLOT(findAct(QString,bool,bool))); 141     connect(replace_dialog,SIGNAL(findReplaceStr(QString,bool)), 142             this,SLOT(findReplace(QString,bool))); 143     connect(replace_dialog,SIGNAL(replaceCurOneStr(QString,QString)), 144             this,SLOT(replaceCur(QString,QString))); 145     connect(replace_dialog,SIGNAL(replaceAllStr(QString,QString,bool)), 146             this,SLOT(replaceAll(QString,QString,bool))); 147 } 148  149 void MainWindow::newAct() 150 { 151     if (mini_text->document()->isModified()) 152     { 153         QMessageBox::StandardButton button = QMessageBox::information(this, 154                                           "尚未保存", "是否要保存?",QMessageBox::Save | 155                                            QMessageBox::Discard | QMessageBox::Cancel); 156         switch(button) 157         { 158             case QMessageBox::Save:{ 159                 saveAct(); 160                 if (mini_text->document()->isModified()){ 161                     return; 162                 } 163             } 164             case QMessageBox::Cancel:{ 165                 return; 166             } 167             case QMessageBox::Discard:{ 168                 break; 169             } 170         } 171     } 172     mini_text->clear(); 173 } 174  175 //打开文件 176 void MainWindow::openAct() 177 { 178     QString file_name = QFileDialog::getOpenFileName(this,tr("打开文件"),QString(), 179                           tr("文本文件(*.txt) ;; C++文件(*.h *.cpp *.hpp)")); 180     cur_file_name = file_name; 181     if(!file_name.isEmpty()){ 182        QFile file(file_name); 183        if(!file.open(QIODevice::ReadOnly)){ 184           QMessageBox::critical(this,tr("错误"),tr("不能打开文件")); 185           return; 186        } 187        QTextStream ins(&file); 188        mini_text->setText(ins.readAll()); 189        file.close(); 190     } 191 } 192  193 //保存文件 194 void MainWindow::saveAct() 195 { 196     if(cur_file_name.isEmpty()){ 197         QString file_name = QFileDialog::getSaveFileName(this,tr("保存文件"),QString(), 198                                tr("文本文件(*.txt) ;; C++文件(*.h *.cpp *.hpp)")); 199         if(!file_name.isEmpty()){ 200             QFile file(file_name); 201             if(!file.open(QIODevice::WriteOnly)){ 202                 QMessageBox::critical(this,tr("错误"),tr("不能打开文件")); 203                 return; 204             } 205             QTextStream outs(&file); 206             outs<<mini_text->toPlainText(); 207             outs.flush(); 208             file.close(); 209         } 210     } 211     else{ 212         QFile file(cur_file_name); 213         if(!file.open(QIODevice::WriteOnly)){ 214             QMessageBox::critical(this,tr("错误"),tr("不能打开文件")); 215             return; 216         } 217         QTextStream outs(&file); 218         outs<<mini_text->toPlainText(); 219         outs.flush(); 220         file.close(); 221     } 222 } 223  224 void MainWindow::anotherSaveAct() 225 { 226     QString file_name = QFileDialog::getSaveFileName(this,tr("保存文件"),QString(), 227                            tr("文本文件(*.txt) ;; C++文件(*.h *.cpp *.hpp)")); 228     if(!file_name.isEmpty()){ 229         QFile file(file_name); 230         if(!file.open(QIODevice::WriteOnly)){ 231             QMessageBox::critical(this,tr("错误"),tr("不能打开文件")); 232             return; 233         } 234         QTextStream outs(&file); 235         outs<<mini_text->toPlainText(); 236         outs.flush(); 237         file.close(); 238     } 239  240 } 241  242 void MainWindow::findReplace(QString find_str, bool flg) 243 { 244     bool find_flag; 245     if(flg){ 246         find_flag = mini_text->find(find_str,QTextDocument::FindCaseSensitively); 247     } 248     else{ 249         find_flag = mini_text->find(find_str); 250     } 251     if(!find_flag){ 252         QMessageBox::information(this,tr("结果"),tr("没有找到查找内容"),QMessageBox::Yes); 253     } 254     else{ 255         find = true; 256     } 257  258  259 } 260  261 void MainWindow::replaceCur(QString find_str, QString replace_str) 262 { 263     if(find){ 264         QTextCursor text_cursor = mini_text->textCursor(); 265         text_cursor.insertText(replace_str); 266     } 267     else{ 268         QMessageBox::information(this,tr("结果"),tr("没有内容不能替换")+find_str,QMessageBox::Yes); 269     } 270     find = false; 271 } 272  273 void MainWindow::replaceAll(QString find_str, QString replace_str,bool flg) 274 { 275     if(!flg){ 276         bool haf = mini_text->find(find_str); 277         if(haf){ 278             QTextCursor text_cursor = mini_text->textCursor(); 279             text_cursor.insertText(replace_str); 280             while(mini_text->find(find_str)){ 281                 text_cursor = mini_text->textCursor(); 282                 text_cursor.insertText(replace_str); 283             } 284             while(mini_text->find(find_str,QTextDocument::FindBackward)){ 285                 text_cursor = mini_text->textCursor(); 286                 text_cursor.insertText(replace_str); 287             } 288         } 289         else{ 290              QMessageBox::information(this,tr("结果"),tr("没有内容不能替换 ")+find_str,QMessageBox::Yes); 291         } 292     } 293     else{ 294         bool haf = mini_text->find(find_str,QTextDocument::FindCaseSensitively); 295         if(haf){ 296             QTextCursor text_cursor = mini_text->textCursor(); 297             text_cursor.insertText(replace_str); 298             while(mini_text->find(find_str,QTextDocument::FindCaseSensitively)){ 299                 text_cursor = mini_text->textCursor(); 300                 text_cursor.insertText(replace_str); 301             } 302             while(mini_text->find(find_str,QTextDocument::FindCaseSensitively|QTextDocument::FindBackward)){ 303                 text_cursor = mini_text->textCursor(); 304                 text_cursor.insertText(replace_str); 305             } 306         } 307         else{ 308             QMessageBox::information(this,tr("结果"),tr("没有内容不能替换")+find_str,QMessageBox::Yes); 309         } 310     } 311  312 } 313  314 void MainWindow::printAct() 315 { 316     QPrinter printer; 317     QString printer_name = printer.printerName(); 318        if( printer_name.size() == 0){ 319            return; 320        } 321        QPrintDialog dlg(&printer, this); 322        if (mini_text->textCursor().hasSelection()){ 323            dlg.addEnabledOption(QAbstractPrintDialog::PrintSelection); 324        } 325        if(dlg.exec() == QDialog::Accepted){ 326            mini_text->print(&printer); 327        } 328 } 329  330 void MainWindow::findAct(QString str,bool ignore,bool choose) 331 { 332     QString text = str; 333     bool find_flag; 334     if(!text.isEmpty()){ 335         if(choose){ 336             if(ignore){ 337               find_flag = mini_text->find(text,QTextDocument::FindCaseSensitively); 338             } 339             else{ 340                 find_flag = mini_text->find(text); 341  342             } 343         } 344         else{ 345             if(ignore){ 346                 find_flag = mini_text->find(text,QTextDocument::FindBackward|QTextDocument::FindCaseSensitively); 347             } 348             else{ 349                 find_flag = mini_text->find(text,QTextDocument::FindBackward); 350  351             } 352         } 353         if(!find_flag){ 354             QMessageBox::information(this,tr("结果"),tr("没有找到查找内容"),QMessageBox::Yes); 355         } 356     } 357  358 } 359  360 void MainWindow::aboutAct() 361 { 362     QMessageBox message(QMessageBox::NoIcon,tr("关于"), tr("version: v1.0/n" 363                                                           "author: karllen/n" 364                                                           "qq: 1160113606/n" 365                                                          "Begin Learning The Qt")); 366     message.setIconPixmap(QPixmap(tr(":/images/me"))); 367     message.exec(); 368  369 } 370  371 void MainWindow::showFindDialog() 372 { 373     find_dialog->show(); 374 } 375  376 void MainWindow::showReplaceDialog() 377 { 378     replace_dialog->show(); 379 } 380  381 void MainWindow::exitAct() 382 { 383     this->close(); 384  385 }

查找对话框类：

1 #ifndef FINDDIALOG_H  2 #define FINDDIALOG_H  3 #include <QDialog>  4 #include <QLineEdit>  5 #include <QLabel>  6 #include <QPushButton>  7 #include <QRadioButton>  8 #include <QGridLayout>  9 #include <QHBoxLayout> 10 #include <QGroupBox> 11 #include <QCheckBox> 12  13 class FindDialog:public QDialog 14 { 15     Q_OBJECT 16 public: 17     FindDialog(QWidget *parent = 0); 18     ~FindDialog(); 19  20 signals: 21     void findTextDataButtonClickedSignal(QString,bool,bool); 22  23 private slots: 24     void findButtonState(); 25     void findDataButtonClickedState(); 26  27 private: 28     QLineEdit *find_edit; 29     QLabel    *find_label,*ignore_label,*next_label,*back_label; 30     QPushButton *find_button; 31     QRadioButton *next_radio; 32     QRadioButton *back_radio; 33     QCheckBox *ignore_flag; 34 }; 35  36 #endif // FINDDIALOG_H

1 #include "finddialog.h"   2    3 FindDialog::FindDialog(QWidget *parent)   4     :QDialog(parent)   5 {   6     setWindowTitle(tr("查找"));   7     find_label = new QLabel(tr("查找"));   8     ignore_label = new QLabel(tr("区分大小写"));   9     next_label = new QLabel(tr("向后"));  10     back_label = new QLabel(tr("向前"));  11     find_edit = new QLineEdit;  12     find_button = new QPushButton(tr("查找下一个"));  13     next_radio = new QRadioButton;  14     back_radio = new QRadioButton;  15     ignore_flag = new QCheckBox;  16   17     find_edit->setText(tr(""));  18   19     QGridLayout *grid_layout = new QGridLayout(this);  20     grid_layout->addWidget(find_label,0,0);  21     grid_layout->addWidget(find_edit,0,1);  22     grid_layout->addWidget(find_button,0,3);  23   24     QHBoxLayout *ignore_layout = new QHBoxLayout;  25     ignore_layout->setSpacing(10);  26     ignore_layout->addWidget(ignore_label);  27     ignore_layout->addWidget(ignore_flag);  28   29     QHBoxLayout *radio_layout = new QHBoxLayout;  30     radio_layout->addWidget(next_label);  31     radio_layout->addWidget(next_radio);  32   33     radio_layout->addWidget(back_label);  34     radio_layout->addWidget(back_radio);  35   36     QGroupBox *group_radio = new QGroupBox(tr("方向"),this);  37     group_radio->setLayout(radio_layout);  38   39     QHBoxLayout *do_radio = new QHBoxLayout;  40     do_radio->addWidget(group_radio);  41   42     grid_layout->addLayout(ignore_layout,1,0);  43     grid_layout->addLayout(do_radio,1,1);  44   45     this->setMaximumSize(300,100);  46     next_radio->setChecked(true);  47     find_button->setEnabled(false);  48     connect(find_edit,SIGNAL(textChanged(QString)),this,SLOT(findButtonState()));  49     connect(find_button,SIGNAL(clicked(bool)),this,SLOT(findDataButtonClickedState()));  50 }  51   52 FindDialog::~FindDialog()  53 {  54     if(find_edit){  55         delete find_edit;  56     }  57     if(find_label){  58         delete find_label;  59     }  60     if(ignore_label){  61         delete ignore_label;  62     }  63     if(next_label){  64         delete next_label;  65     }  66     if(back_label){  67         delete back_label;  68     }  69     if(find_button){  70         delete find_button;  71     }  72     if(next_radio){  73         delete next_radio;  74     }  75     if(back_radio){  76         delete back_radio;  77     }  78     if(ignore_flag){  79         delete ignore_flag;  80     }  81 }  82   83 void FindDialog::findButtonState()  84 {  85     if(find_edit->text().isEmpty()){  86         find_button->setEnabled(false);  87     }  88     else{  89         find_button->setEnabled(true);  90     }  91   92 }  93   94 void FindDialog::findDataButtonClickedState()  95 {  96     if(find_edit->text().isEmpty()){  97         return;  98     }  99     QString str = find_edit->text(); 100     if(next_radio->isChecked()){ 101         if(ignore_flag->isChecked()){ 102             emit findTextDataButtonClickedSignal(str,true,true); 103         } 104         else{ 105             emit findTextDataButtonClickedSignal(str,false,true); 106         } 107     } 108     if(back_radio->isChecked()){ 109         if(ignore_flag->isChecked()){ 110             emit findTextDataButtonClickedSignal(str,true,false); 111         } 112         else{ 113             emit findTextDataButtonClickedSignal(str,false,false); 114         } 115     } 116 }

替换对话框类:

1 #ifndef REPLACEDIALOG_H  2 #define REPLACEDIALOG_H  3   4 #include <QDialog>  5 #include <QPushButton>  6 #include <QLabel>  7 #include <QCheckBox>  8 #include <QLineEdit>  9 #include <QGridLayout> 10 #include <QVBoxLayout> 11  12 class ReplaceDialog:public QDialog 13 { 14     Q_OBJECT 15 public: 16     ReplaceDialog(QWidget *parent = 0); 17     ~ReplaceDialog(); 18 signals: 19     void replaceAllStr(QString , QString,bool); 20     void replaceCurOneStr(QString,QString); 21     void findReplaceStr(QString,bool); 22 private slots: 23     void chooseStrSlot(); 24     void findButtonStateSlot(); 25     void replaceOneButtonStateSlot(); 26     void replaceAllButtonStateSlot(); 27 private: 28     QLineEdit *find_str; 29     QLineEdit *replace_str; 30     QPushButton *find_next_button; 31     QPushButton *replaced_one_button; 32     QPushButton *replaced_all_button; 33     QPushButton *cancle_button; 34     QCheckBox *ignore_flag; 35     QLabel  *find_label; 36     QLabel  *replace_label; 37 }; 38  39 #endif // REPLACEDIALOG_H

1 #include "replacedialog.h"   2    3 ReplaceDialog::ReplaceDialog(QWidget *parent)   4     :QDialog(parent)   5 {   6     find_label          = new QLabel(tr("查找内容"));   7     replace_label       = new QLabel(tr("替换为"));   8     find_str            = new QLineEdit();   9     replace_str         = new QLineEdit();  10     find_next_button    = new QPushButton(tr("查找下一个"));  11     replaced_one_button = new QPushButton(tr("替换"));  12     replaced_all_button = new QPushButton(tr("全部替换"));  13     cancle_button       = new QPushButton(tr("取消"));  14     ignore_flag         = new QCheckBox(tr("区分大小写"));  15   16     QGridLayout *grdly  = new QGridLayout(this);  17     QVBoxLayout *vboxly = new QVBoxLayout(this);  18   19     vboxly->addWidget(replaced_all_button);  20     vboxly->addWidget(cancle_button);  21     grdly->addWidget(find_label,0,0);  22     grdly->addWidget(find_str,0,1);  23     grdly->addWidget(find_next_button,0,2);  24     grdly->addWidget(replace_label,1,0);  25     grdly->addWidget(replace_str,1,1);  26     grdly->addWidget(replaced_one_button,1,2);  27     grdly->addWidget(ignore_flag,2,1);  28     grdly->addLayout(vboxly,2,2);  29   30     find_str->setText(tr(""));  31     replace_str->setText(tr(""));  32     find_next_button->setEnabled(false);  33     replaced_one_button->setEnabled(false);  34     replaced_all_button->setEnabled(false);  35   36     this->setMaximumSize(300,100);  37   38     connect(find_str,SIGNAL(textChanged(QString)),this,SLOT(chooseStrSlot()));  39     connect(cancle_button,SIGNAL(clicked()),this,SLOT(close()));  40     connect(find_next_button,SIGNAL(clicked()),this,SLOT(findButtonStateSlot()));  41     connect(replaced_one_button,SIGNAL(clicked()),this,SLOT(replaceOneButtonStateSlot()));  42     connect(replaced_all_button,SIGNAL(clicked()),this,SLOT(replaceAllButtonStateSlot()));  43 }  44   45 ReplaceDialog::~ReplaceDialog()  46 {  47     if(find_str){  48         delete find_str;  49     }  50     if(replace_str){  51         delete replace_str;  52     }  53     if(find_next_button){  54         delete find_next_button;  55     }  56     if(replaced_one_button){  57         delete replaced_one_button;  58     }  59     if(replaced_all_button){  60         delete replaced_all_button;  61     }  62     if(cancle_button){  63         delete cancle_button;  64     }  65     if(ignore_flag){  66         delete ignore_flag;  67     }  68     if(find_label){  69         delete find_label;  70     }  71     if(replace_label){  72         delete replace_label;  73     }  74 }  75   76 void ReplaceDialog::chooseStrSlot()  77 {  78     if(!find_str->text().isEmpty()){  79         find_next_button->setEnabled(true);  80         replaced_one_button->setEnabled(true);  81         replaced_all_button->setEnabled(true);  82     }  83     else{  84         find_next_button->setEnabled(false);  85         replaced_one_button->setEnabled(false);  86         replaced_all_button->setEnabled(false);  87     }  88 }  89   90 void ReplaceDialog::findButtonStateSlot()  91 {  92     if(ignore_flag->isChecked()){  93         emit findReplaceStr(find_str->text(),true);  94     }  95     else{  96         emit findReplaceStr(find_str->text(),false);  97     }  98 }  99  100 void ReplaceDialog::replaceOneButtonStateSlot() 101 { 102     emit replaceCurOneStr(find_str->text(),replace_str->text()); 103  104 } 105  106 void ReplaceDialog::replaceAllButtonStateSlot() 107 { 108     if(ignore_flag->isChecked()){ 109         emit replaceAllStr(find_str->text() , replace_str->text(),true); 110     } 111     else{ 112         emit replaceAllStr(find_str->text() , replace_str->text(),false); 113     } 114  115  116 }

main函数：

1 #include "mainwindow.h"  2 #include "finddialog.h"  3 #include <QApplication>  4   5 int main(int argc, char *argv[])  6 {  7     QApplication a(argc, argv);  8   9     MainWindow w; 10     w.show(); 11     return a.exec(); 12 }

注：代码下载地址 http://download.csdn.net/detail/u010085340/9289609