C++ GUI Qt4编程(10)-3.4spreadsheet

1. C++ GUI Qt4编程第三章，增加spreadsheet。

2. spreadsheet.h

 /**/
 #ifndef SPREADSHEET_H
 #define SPREADSHEET_H

 #include <QTableWidget>

 class Spreadsheet : public QTableWidget
 {
     Q_OBJECT

 public:
     Spreadsheet(QWidget *parent = );
     void clear();

 private:
     enum{RowCount = , ColumnCount = };
 };

 #endif

3. spreadsheet.cpp

 /**/
 #include "spreadsheet.h"

 Spreadsheet::Spreadsheet(QWidget *parent)
     : QTableWidget(parent)
 {
     clear();
 }

 void Spreadsheet::clear()
 {
     setRowCount();            /*将表格向下调整为0X0，及完全清空表格*/
     setColumnCount();
     setRowCount(RowCount);    /*重新调整表格大小为RowCount X ColumnCount*/
     setColumnCount(ColumnCount);

     for (int i=;i<ColumnCount;++i)
     {
         QTableWidgetItem *item = new QTableWidgetItem;
         /*把QTableWidgetItem水平方向上的标题修改为列名A B ... Z。垂直不用设，默认从1开始。*/
         item->setText(QString(QChar('A' + i)));
         setHorizontalHeaderItem(i, item);
     }

     setCurrentCell(, );    /*把单元格光标移动到A1处*/
 }

4. mainwindow.h

 /**/
 #ifndef MAINWINDOW_H
 #define MAINWINDOW_H

 #include <QMainWindow>

 class QMenu;
 class QAction;
 class QToolBar;
 class QLabel;
 class Spreadsheet;

 class MainWindow : public QMainWindow
 {
     Q_OBJECT

 public:
     MainWindow();

 private:
     Spreadsheet *spreadsheet;
     QString currentFileName;

     /*菜单*/
     QMenu *fileMenu;
     QMenu *editMenu;
     QMenu *toolsMenu;
     QMenu *optionsMenu;
     QMenu *helpMenu;

     /*File动作*/
     QAction *newAction;
     QAction *openAction;
     QAction *saveAction;
     QAction *saveAsAction;
     QAction *exitAction;

     /*Edit动作*/
     QAction *cutAction;
     QAction *copyAction;
     QAction *pasteAction;
     QAction *deleteAction;
     QMenu   *selectSubMenu;
     QAction *selectRowAction;
     QAction *selectColumnAction;
     QAction *selectAllAction;
     QAction *findAction;
     QAction *goToCellAction;

     /*Tools动作*/
     QAction *recalculateAction;
     QAction *sortAction;

     /*Options动作*/
     QAction *showGridAction;
     QAction *autoRecalculateAction;

     /*Help动作*/
     QAction *aboutAction;
     QAction *aboutQtAction;

     /*工具栏*/
     QToolBar *fileToolBar;
     QToolBar *editToolBar;

     /*状态栏标签*/
     QLabel *locationLabel;
     QLabel *formulaLabel;

     void createMenus();
     void createActions();
     void createFileActions();
     void createEditActions();
     void createToolsActions();
     void createOptionsActions();
     void createHelpAction();
     void createToolBar();
     void createStatusBar();
     void setCurrentFile(const QString &fileName);
     QString strippedName(const QString &fullFileName);
 };

 #endif    /*MAINWINDOW_H*/

5. mainwindow.cpp

 /**/
 #include <QMenu>
 #include <QMenuBar>
 #include <QAction>
 #include <QToolBar>
 #include <QLabel>
 #include <QStatusBar>
 #include <QFileInfo>
 #include "mainwindow.h"
 #include "spreadsheet.h"

 MainWindow::MainWindow()
 {
     /*创建Spreadsheet窗口部件*/
     spreadsheet = new Spreadsheet(this);
     /*设置为中央窗口部件*/
     setCentralWidget(spreadsheet);

     createActions();
     createMenus();
     createToolBar();
     createStatusBar();

     setWindowIcon(QIcon(":/images/icon.png"));
     setCurrentFile("");
 }

 void MainWindow::createMenus()
 {
     /*file menu*/
     fileMenu = menuBar()->addMenu(tr("&File"));
     fileMenu->addAction(newAction);
     fileMenu->addAction(openAction);
     fileMenu->addAction(saveAction);
     fileMenu->addAction(saveAsAction);
     fileMenu->addSeparator();
     fileMenu->addAction(exitAction);

     /*edit menu*/
     editMenu = menuBar()->addMenu(tr("&Edit"));
     editMenu->addAction(cutAction);
     editMenu->addAction(copyAction);
     editMenu->addAction(pasteAction);
     editMenu->addAction(deleteAction);
     selectSubMenu = editMenu->addMenu(tr("&Select"));
     selectSubMenu->addAction(selectRowAction);
     selectSubMenu->addAction(selectColumnAction);
     selectSubMenu->addAction(selectAllAction);
     editMenu->addSeparator();
     editMenu->addAction(findAction);
     editMenu->addAction(goToCellAction);

     /*tools menu*/
     toolsMenu = menuBar()->addMenu(tr("&Tools"));
     toolsMenu->addAction(recalculateAction);
     toolsMenu->addAction(sortAction);

     /*option menu*/
     optionsMenu = menuBar()->addMenu(tr("&Option"));
     optionsMenu->addAction(showGridAction);
     optionsMenu->addAction(autoRecalculateAction);

     /*间隔器*/
     menuBar()->addSeparator();

     /*help menu*/
     helpMenu = menuBar()->addMenu(tr("&Help"));
     helpMenu->addAction(aboutAction);
     helpMenu->addAction(aboutQtAction);
 }

 void MainWindow::createActions()
 {
     createFileActions();
     createEditActions();
     createToolsActions();
     createOptionsActions();
     createHelpAction();
 }

 /*
  * file动作
  * 加速键与快捷键的区别
  */
 void MainWindow::createFileActions()
 {
     /*newAction*/
     newAction = new QAction(tr("&New"), this);    /*加速键 Alt+N*/
     newAction->setIcon(QIcon(":/images/filenew.png"));    /*图标*/
     newAction->setShortcut(QKeySequence::New);    /*快捷键 Ctrl+N*/
 //    newAction->setShortcut(tr("Ctrl+N"));        /*快捷键的另一种方法*/
     /*状态栏显示内容*/
     newAction->setStatusTip(tr("Create a new spreadsheet file"));

     /*openAction*/
     openAction = new QAction(tr("&Open"), this);
     openAction->setIcon(QIcon(":/images/fileopen.png"));
     openAction->setShortcut(QKeySequence::Open);
     openAction->setStatusTip(tr("Opne an existing spreadsheet file"));

     /*saveAction*/
     saveAction = new QAction(tr("&Save"), this);
     saveAction->setIcon(QIcon(":/images/filesave.png"));
     saveAction->setShortcut(QKeySequence::Save);
     saveAction->setStatusTip(tr("Save the spreadsheet to disk"));

     /*saveAsAction*/
     saveAsAction = new QAction(tr("Save &As..."), this);
     saveAsAction->setIcon(QIcon(":/images/filesaveas.png"));
     saveAsAction->setShortcut(QKeySequence::SaveAs);
     saveAsAction->setStatusTip(tr("Save the spreadsheet under a new name"));

     /*exitAction */
     exitAction = new QAction(tr("E&xit"), this);
     exitAction->setShortcut(tr("Ctrl+Q"));
     exitAction->setStatusTip(tr("Exit the application"));
 }

 /*edit动作*/
 void MainWindow::createEditActions()
 {
     /*cutAction*/
     cutAction = new QAction(tr("Cu&t"), this);
     cutAction->setIcon(QIcon(":/images/editcut.png"));
     cutAction->setShortcut(QKeySequence::Cut);
     cutAction->setStatusTip(tr("Cut the Current selection's "
         "contents to the clipboard"));

     /*copyAction*/
     copyAction = new QAction(tr("&Copy"), this);
     copyAction->setIcon(QIcon(":/images/editcopy.png"));
     copyAction->setShortcut(QKeySequence::Copy);
     copyAction->setStatusTip(tr("Copy the current selection's "
         "contents to the clipboard"));

     /*pasteAction*/
     pasteAction = new QAction(tr("&Paste"), this);
     pasteAction->setIcon(QIcon(":/images/editpaste.png"));
     pasteAction->setShortcut(QKeySequence::Paste);
     pasteAction->setStatusTip(tr("Paste the clipboard's "
         "contents into the current selection"));

     /*deleteAction*/
     deleteAction = new QAction(tr("&Delete"), this);
     deleteAction->setIcon(QIcon(":/images/editdelete.png"));
     deleteAction->setShortcut(QKeySequence::Delete);
     deleteAction->setStatusTip(tr("Delete the current selection's "     "contents"));

     selectRowAction = new QAction(tr("&Row"), this);
     selectRowAction->setStatusTip(tr("Select all the cells in "
         "the current row"));
     selectColumnAction = new QAction(tr("&Column"), this);
     selectColumnAction->setStatusTip(tr("Select all the cells in "
         "the current column"));
     selectAllAction = new QAction(tr("&All"), this);
     selectAllAction->setShortcut(QKeySequence::SelectAll);
     selectAllAction->setStatusTip(tr("Select all the cells in "
         "the spreadsheet"));

     /*findAction*/
     findAction = new QAction(tr("&Find..."), this);
     findAction->setIcon(QIcon(":/images/editfind.png"));
     findAction->setShortcut(QKeySequence::Find);
     findAction->setStatusTip(tr("Find a matching cell"));

     /*goToCellAction*/
     goToCellAction = new QAction(tr("&Go to Cell..."), this);
     goToCellAction->setIcon(QIcon(":/images/editgotocell"));
     goToCellAction->setShortcut(tr("Ctrl+G"));
 }

 /*tools动作*/
 void MainWindow::createToolsActions()
 {
     recalculateAction = new QAction(tr("&Recalculate"), this);
     recalculateAction->setShortcut(tr("F9"));
     recalculateAction->setStatusTip(tr("Recalculate all the "
         "spreadsheet's formulas"));

     sortAction = new QAction(tr("&Sort..."), this);
     sortAction->setStatusTip(tr("Sort the selected cells or all "
         "the cells"));
 }

 /*options动作*/
 void MainWindow::createOptionsActions()
 {
     showGridAction = new QAction(tr("&Show Grid"), this);
     showGridAction->setCheckable(true);        /*使动作可被选*/
     showGridAction->setStatusTip(tr("Show or hide the "
         "spreadsheet's grid"));

     autoRecalculateAction = new QAction(tr("Auto-Recalculate"), this);
     autoRecalculateAction->setCheckable(true);    /*使动作可被选*/
     autoRecalculateAction->setStatusTip(tr("Switch auto-"
         "recalculate on or off"));
 }

 /*help动作*/
 void MainWindow::createHelpAction()
 {
     aboutAction = new QAction(tr("&About"), this);
     aboutAction->setStatusTip(tr("Show the application's "
         "About box"));

     aboutQtAction = new QAction(tr("About &Qt"), this);
     aboutQtAction->setStatusTip(tr("Show the Qt library's "
         "About box"));
 }

 /*工具栏*/
 void MainWindow::createToolBar()
 {
     fileToolBar = addToolBar(tr("&File"));
     fileToolBar->addAction(newAction);
     fileToolBar->addAction(openAction);
     fileToolBar->addAction(saveAction);

     editToolBar = addToolBar(tr("&Edit"));
     editToolBar->addAction(cutAction);
     editToolBar->addAction(copyAction);
     editToolBar->addAction(pasteAction);
     editToolBar->addSeparator();
     editToolBar->addAction(findAction);
     editToolBar->addAction(goToCellAction);
 }

 /*状态栏*/
 void MainWindow::createStatusBar()
 {
     /* W999 作用：1.显示的内容。2.决定locationLabel的尺寸大小*/
     locationLabel = new QLabel(" W999 ");
     /*对齐方式：居中对齐*/
     locationLabel->setAlignment(Qt::AlignHCenter);
     /*最小大小为窗口部件的理想大小*/
     locationLabel->setMinimumSize(locationLabel->sizeHint());

     formulaLabel = new QLabel;
     /*缩进，文本与左侧边的偏移量*/
     formulaLabel->setIndent();

     /*单元格定位指示器，伸展因子默认为0*/
     statusBar()->addWidget(locationLabel);
     /*单元格公式指示器，伸展因子为1*/
     statusBar()->addWidget(formulaLabel, );
 }

 void MainWindow::setCurrentFile(const QString &fileName)
 {
     currentFileName = fileName;
     /*true:保存过和未保存有区别；false:无区别*/
     setWindowModified(true);

     QString shownName = tr("Untitled");

     if (!currentFileName.isEmpty())
     {
         shownName = strippedName(currentFileName);    /*名字去掉路径*/
     }

     /*[*]:当WindowModified属性为true时，保存过的文件才没有星号*/
     setWindowTitle(tr("%1[*] - %2").arg(shownName)
                                    .arg("Spreadsheet"));
 }

 /*去掉路径，只保留文件名*/
 QString MainWindow::strippedName(const QString &fullFileName)
 {
     return QFileInfo(fullFileName).fileName();
 }