做图表的网站 免费,专业的官网设计公司,最佳线上网站制作模板,江苏省住房和建设部网站文章目录 Qt QtableWidget表格删除选中行只能选择一行#xff0c;点击按钮后#xff0c;删除一行可以选择中多行#xff0c;点击按钮后#xff0c;删除多行选中某一列中的不同行#xff0c;点击按钮后#xff0c;删除多行 QTableWidgetSelectionRange介绍QTableWidget的选… 文章目录 Qt QtableWidget表格删除选中行只能选择一行点击按钮后删除一行可以选择中多行点击按钮后删除多行选中某一列中的不同行点击按钮后删除多行 QTableWidgetSelectionRange介绍QTableWidget的选择模式 Qt QtableWidget表格删除选中行
只能选择一行点击按钮后删除一行
设置 QTableWidget *tb ui-tableWidget;tb-setSelectionBehavior(QAbstractItemView::SelectRows);tb-setSelectionMode(QAbstractItemView::SingleSelection);操作 QTableWidget *tb ui-tableWidget;int curRowtb-currentRow(); //当前行号tb-removeRow(curRow); //删除当前行及其items可以选择中多行点击按钮后删除多行
设置 QTableWidget *tb ui-tableWidget;tb-setSelectionBehavior(QAbstractItemView::SelectRows);tb-setSelectionMode(QAbstractItemView::ExtendedSelection);操作 QTableWidget *tb ui-tableWidget;QItemSelectionModel *m_selection tb-selectionModel();QModelIndexList indexList m_selection-selectedIndexes();QListint list;int prev -1,curr-1;if(indexList.length()1){//预处理第一行prev indexList.at(0).row();list.append(prev);for(int i1;iindexList.length();i){//qDebug() row: indexList.at(i).row() column: indexList.at(i).column();curr indexList.at(i).row();if(prev curr){continue;}else{prev curr;list.append(prev);}}}else if(indexList.length()1){list.append(indexList.at(0).row());}else{return;}//从大到小排序,必须从最后一行 往前删除 不然会打乱顺序std::sort(list.rbegin(),list.rend());//根据填充到的数据 删除选中列for(int j 0; j list.size(); j){int cc list.at(j);tb-removeRow(cc); //删除当前行及其items}选中某一列中的不同行点击按钮后删除多行
无需设置setSelectionBehavior(QAbstractItemView::SelectRows)但是可以选择的那一列最好设置为不可编辑。按下Ctrl键选择多行。
设置1 tableView-setSelectionMode(QAbstractItemView::ExtendedSelection);//选择模式m_selection new QItemSelectionModel(m_model,this); //创建选择模型tableView-setSelectionModel(m_selection); //设置选择模型设置2 QStandardItem *item1 new QStandardItem(aa1);item1-setEditable(false);QStandardItem *item2 new QStandardItem(aa2);item2-setEditable(false); QListQStandardItem * list {item1,item2};model-appendRow(list); 操作 QModelIndexList indexList m_selection-selectedIndexes();QListint list;int sameColumn-1;for(int i0;iindexList.length();i){if(i0){sameColumnindexList.at(i).column();}//qDebug() row: indexList.at(i).row() column: indexList.at(i).column();if(sameColumn!indexList.at(i).column()){//上面currentColumnChanged信号其实已经让用户只能选择同一列,这里双重保险qDebug()你的选择有不同列请务必选择同一列的不同行来进行多行删除操作;return;}list.append(indexList.at(i).row());}//从大到小排序,必须从最后一行 往前删除 不然会打乱顺序std::sort(list.rbegin(),list.rend());//根据填充到的数据 删除选中列for(int j 0; j list.size(); j){int cc list.at(j);m_model-removeRow(cc);}QTableWidgetSelectionRange介绍
QTableWidgetSelectionRange是Qt框架中用于表示QTableWidget中选定的一块单元格区域的类。以下是如何使用QTableWidgetSelectionRange的一些常见操作
获取当前选定的单元格区域
QListQTableWidgetSelectionRange ranges tableWidget-selectedRanges();获取第一个选定的单元格区域的起始行、起始列、行数和列数
if (!ranges.isEmpty()) {int startRow ranges.first().topRow();int startColumn ranges.first().leftColumn();int rowCount ranges.first().rowCount();int columnCount ranges.first().columnCount();
}遍历所有选定的单元格区域
foreach (const QTableWidgetSelectionRange range, ranges) {int startRow range.topRow();int startColumn range.leftColumn();int rowCount range.rowCount();int columnCount range.columnCount();// 进行处理...
}检查特定的单元格区域是否被选定
QTableWidgetSelectionRange range(1, 1, 3, 3); // 定义一个起始行为1起始列为1行数和列数为3的区域
if (tableWidget-selectedRanges().contains(range)) {// 区域被选定
}清除所有选定的单元格区域
tableWidget-clearSelection();QTableWidgetSelectionRange类提供了一种方便的方式来处理QTableWidget中的选择区域。使用它可以获取和操作选定的单元格区域进行相关的处理和操作。
QTableWidget的选择模式
QTableWidget通过setSelectionMode()和SelectionBehavior来设置选择模式
enum QAbstractItemView::SelectionBehavior
ConstantValueDescriptionQAbstractItemView::SelectItems0Selecting single items.QAbstractItemView::SelectRows1Selecting only rows.QAbstractItemView::SelectColumns2Selecting only columns.
enum QAbstractItemView::SelectionMode
此枚举指示视图如何响应用户选择
ConstantValueDescriptionQAbstractItemView::SingleSelection1When the user selects an item, any already-selected item becomes unselected. It is possible for the user to deselect the selected item by pressing the Ctrl key when clicking the selected item.QAbstractItemView::ContiguousSelection4When the user selects an item in the usual way, the selection is cleared and the new item selected. However, if the user presses the Shift key while clicking on an item, all items between the current item and the clicked item are selected or unselected, depending on the state of the clicked item.QAbstractItemView::ExtendedSelection3When the user selects an item in the usual way, the selection is cleared and the new item selected. However, if the user presses the Ctrl key when clicking on an item, the clicked item gets toggled and all other items are left untouched. If the user presses the Shift key while clicking on an item, all items between the current item and the clicked item are selected or unselected, depending on the state of the clicked item. Multiple items can be selected by dragging the mouse over them.QAbstractItemView::MultiSelection2When the user selects an item in the usual way, the selection status of that item is toggled and the other items are left alone. Multiple items can be toggled by dragging the mouse over them.QAbstractItemView::NoSelection0Items cannot be selected.
