63 单元格定位与文字设置对话框

第五步，添加通过“单元”对话框，设置单元格文字的功能。

63.1 “单元”对话框

C:\Users\Minwei\Projects\Qt\Sheet\celldialog.h：

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...
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class CellDialog : public QDialog
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{
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    ...
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protected:
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    void closeEvent(QCloseEvent*);
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    void showEvent(QShowEvent*);
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signals:
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    void updateCell(int row, int column, QString const& content);
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    void enableCell(bool enabled);
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public slots:
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    void setMaximum(int rowCount, int columnCount);
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    void setCurrent(int row, int column, QString const& content);
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    ...
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};
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...

C:\Users\Minwei\Projects\Qt\Sheet\celldialog.cpp：

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...
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CellDialog::CellDialog(QWidget *parent) :
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    ...
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{
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    ...
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    connect(parent, SIGNAL(setMaximum(int, int)),
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              this,   SLOT(setMaximum(int, int)));
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    connect(parent, SIGNAL(setCurrent(int, int, QString const&)),
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              this,   SLOT(setCurrent(int, int, QString const&)));
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    connect(  this, SIGNAL(updateCell(int, int, QString const&)),
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            parent,   SLOT(updateCell(int, int, QString const&)));
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    connect(  this, SIGNAL(enableCell(bool)),
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            parent,   SLOT(enableCell(bool)));
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    ...
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}
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...
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void CellDialog::closeEvent(QCloseEvent*)
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{
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    emit enableCell(true);
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}
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void CellDialog::showEvent(QShowEvent*)
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{
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    emit enableCell(false);
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}
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void CellDialog::setMaximum(int rowCount, int columnCount)
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{
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    ui->m_spinRow->setMaximum(rowCount);
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    ui->m_spinCol->setMaximum(columnCount);
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}
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void CellDialog::setCurrent(int row, int column, QString const& content)
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{
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    ui->m_spinRow->setValue(row);
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    ui->m_spinCol->setValue(column);
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    ui->m_editContent->setText(content);
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}
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void CellDialog::on_m_btnUpdate_clicked()
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{
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    emit updateCell(
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        ui->m_spinRow->value() - 1,
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        ui->m_spinCol->value() - 1,
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        ui->m_editContent->text());
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}

63.2 主窗口

C:\Users\Minwei\Projects\Qt\Sheet\sheetwindow.h：

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...
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#include "celldialog.h"
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...
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class SheetWindow : public QMainWindow
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{
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    ...
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signals:
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    void setMaximum(int rowCount, int columnCount);
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    void setCurrent(int row, int column, QString const& content);
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public slots:
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    void updateCell(int row, int column, QString const& content);
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    void enableCell(bool enabled);
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    ...
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private:
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    ...
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    CellDialog m_dlgCell;
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    ...
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};
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...

C:\Users\Minwei\Projects\Qt\Sheet\sheetwindow.cpp：

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...
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SheetWindow::SheetWindow(QWidget *parent)
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    ...
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    , m_dlgCell(this)
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    ...
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{
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    ...
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}
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...
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void SheetWindow::updateCell(int row, int column, QString const& content)
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{
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    QModelIndex index = m_model->index(row, column);
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    m_model->setData(index, content, Qt::DisplayRole);
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    m_selection->clearSelection();
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    m_selection->setCurrentIndex(index, QItemSelectionModel::Select);
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}
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void SheetWindow::enableCell(bool enabled)
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{
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    ui->m_actCell->setEnabled(enabled);
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}
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void SheetWindow::on_m_actRowCol_triggered()
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{
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    ...
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    if (dlg.exec() == QDialog::Accepted)
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    {
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        ...
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        emit setMaximum(dlg.getRowCount(), dlg.getColumnCount());
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        ...
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    }
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    ...
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}
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...
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void SheetWindow::on_m_actCell_triggered()
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{
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    m_dlgCell.show();
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}
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void SheetWindow::on_m_table_clicked(const QModelIndex &index)
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{
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    emit setCurrent(index.row() + 1, index.column() + 1,
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        index.data().toString());
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}
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void SheetWindow::on_m_selection_currentChanged(
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    QModelIndex const& current, QModelIndex const& previous)
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{
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    ...
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    emit setCurrent(current.row() + 1, current.column() + 1, item->text());
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    ...
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}
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...

63.3 测试验证

运行效果如图所示：