Qt Table Widget常用操作
一、鼠标悬浮在item上 显示提示信息
1、在构造函数开启table Widget控件的鼠标捕获功能
// 开启鼠标捕获功能(实现table widget的悬浮功能)
ui.tableWidget->setMouseTracking(true);
2、连接信号和槽
connect(ui.tableWidget, SIGNAL( cellEntered(int, int)), this, SLOT(slotCellEntered(int, int)));
3、编写槽函数
void test10292::slotCellEntered(int r, int c)
{
QTableWidgetItem* item = ui.tableWidget->item(r, c);
if (item == nullptr)
{
return;
}
QToolTip::showText(QCursor::pos(), item->text());
}
二:点击表头实现排序
第二个是后实现的,按数值排序,因为Qt自带的排序是按 字段排序的
// 连接信号和槽
connect(ui.tableWidget->horizontalHeader(), SIGNAL(sectionClicked(int)), this, SLOT(sortHeader(int)));
// 实现槽函数
void test10292::sortHeader(int index)
{
if (index == )
{
ui.tableWidget->sortItems(index, Qt::DescendingOrder);
return;
}
ui.tableWidget->sortItems(index, Qt::AscendingOrder);
}
void test10292::sortHeader(int index)
{
if (index == || index == )
{
sortTableItem(index);
return;
}
ui.tableWidget->sortItems(index, Qt::AscendingOrder);
}
// 表头排序
void test10292::sortTableItem(int index)
{
int rowCountNum = ui.tableWidget->rowCount();
for (int i = rowCountNum - ; i >= ; i--)
{
for (int j = ; j < i; j++)
{
if (ui.tableWidget->item(j, index)->text().toInt() < ui.tableWidget->item(j + , index)->text().toInt())
{
QString str1 = ui.tableWidget->item(j + , )->text();
QString str2 = ui.tableWidget->item(j + , )->text();
QString str3 = ui.tableWidget->item(j + , )->text();
ui.tableWidget->item(j + , )->setText(ui.tableWidget->item(j, )->text());
ui.tableWidget->item(j + , )->setText(ui.tableWidget->item(j, )->text());
ui.tableWidget->item(j + , )->setText(ui.tableWidget->item(j, )->text());
ui.tableWidget->item(j, )->setText(str1);
ui.tableWidget->item(j, )->setText(str2);
ui.tableWidget->item(j, )->setText(str3);
}
}
}
}
三:拖拽item 实现两个item内容的互换
需要写一个类MyQTableWidget继承自QTableWidget,然后重写mousePressEvent和dropEvent事件处理函数
MyQTableWidget.h 文件
#ifndef MYQTABLEWIDGET_H
#define MYQTABLEWIDGET_H #include <QTableWidget>
#include <QMouseEvent>
#include <QDebug> class MyQTableWidget : public QTableWidget
{
Q_OBJECT public:
MyQTableWidget(QWidget *parent);
~MyQTableWidget(); private:
QString temp;
QPoint m_spos, m_dpos;
QTableWidgetItem* sitem;
QTableWidgetItem* ditem;
void mousePressEvent(QMouseEvent *event);
void dropEvent(QDropEvent *event);
}; #endif // MYQTABLEWIDGET_H
MyQTableWidget.cpp 文件
#include "MyQTableWidget.h" MyQTableWidget::MyQTableWidget(QWidget *parent)
:QTableWidget(parent)
{
/******************** 实现表格控件拖拽item交换数据 ********************/
this->setDragDropMode(QAbstractItemView::DragDrop);
this->setDragEnabled(true);
this->setAcceptDrops(true);
//选中一个Item
this->setSelectionBehavior(QAbstractItemView::SelectItems);
} MyQTableWidget::~MyQTableWidget()
{ } void MyQTableWidget::mousePressEvent(QMouseEvent *event)
{
m_spos = event->pos();
sitem = new QTableWidgetItem();
sitem = QTableWidget::itemAt(m_spos);
if (sitem == NULL)
{
return;
}
temp = sitem->text();
QTableWidget::mousePressEvent(event);
} void MyQTableWidget::dropEvent(QDropEvent *event)
{
m_dpos = event->pos();
ditem = new QTableWidgetItem();
ditem = QTableWidget::itemAt(m_dpos);
if (ditem == NULL)
{
return;
}
sitem->setText(ditem->text());
ditem->setText(temp);
}
四:在 item 里面添加CheckBox控件
1、添加选择功能
QTableWidgetItem* item = new QTableWidgetItem();
item = new QTableWidgetItem();
item->setCheckState(Qt::Unchecked);
item->setText(QString::fromLocal8Bit("勾选"));
item->setBackgroundColor(QColor(0x00, 0xFF, 0x00));
ui.tableWidget->setItem(row, , item);
2、复选框选择事件处理
// 连接信号和槽
connect(ui.tableWidget, SIGNAL(cellClicked(int, int)), this, SLOT(stateChecked(int, int)));
// 实现槽函数
void test10292::stateChecked(int row, int column )
{
if (column == )
{
QTableWidgetItem* item = ui.tableWidget->item(row, column);
if (item != NULL)
{
if (item->checkState() == Qt::Checked)
{
// 选中红色
item->setBackgroundColor(QColor(0xFF, 0x00, 0x00));
}
else if (item->checkState() == Qt::Unchecked)
{
// 没选中绿色
item->setBackgroundColor(QColor(0x00, 0xFF, 0x00));
}
}
}
}
五:插入复选框的第二种方法
QCheckBox* cb = new QCheckBox();
cb->setText(QString::fromLocal8Bit("易语言"));
ui.tableWidget->setCellWidget(row, , cb);
六:其中一个item是CheckBox控件,拖拽实现交换两个item(包括控件交换)
主要是通过 item 的关联数据来实现, 插入数据的时候如果是控件关联数据设置为一个值,不是控件设置为另外一个值。然后在dropEvent()事件函数里面处理。
void test10292::AddData(const QString& id, const QString& name, int score)
{
int row = ui.tableWidget->rowCount();
ui.tableWidget->insertRow(row);
// ID
QTableWidgetItem* item = new QTableWidgetItem();
item->setText(id);
item->setData(Qt::ToolTip, "");
ui.tableWidget->setItem(row, , item);
item->setTextAlignment(Qt::AlignHCenter|Qt::AlignVCenter);
// name
item = new QTableWidgetItem();
item->setText(name);
item->setData(Qt::ToolTip, "");
ui.tableWidget->setItem(row, , item);
item->setTextAlignment(Qt::AlignHCenter|Qt::AlignVCenter);
// score
item = new QTableWidgetItem();
item->setText(QString::number(score));
item->setData(Qt::ToolTip, "");
ui.tableWidget->setItem(row, , item);
item->setTextAlignment(Qt::AlignHCenter|Qt::AlignVCenter);
// 第四列插入复选框
/*QCheckBox* cb = new QCheckBox();
cb->setText(QString::fromLocal8Bit("易语言"));
ui.tableWidget->setCellWidget(row, 3, cb);*/
item = new QTableWidgetItem();
item->setCheckState(Qt::Unchecked);
item->setText(QString::fromLocal8Bit("勾选"));
item->setBackgroundColor(QColor(0x00, 0xFF, 0x00));
item->setData(Qt::ToolTip, "this is tooltip");
ui.tableWidget->setItem(row, , item);
}
#include "MyQTableWidget.h" MyQTableWidget::MyQTableWidget(QWidget *parent)标签:控件,Widget,Qt,int,item,tableWidget,ui,ditem From: https://www.cnblogs.com/managechina/p/16733634.html
:QTableWidget(parent)
{
/******************** 实现表格控件拖拽item交换数据 ********************/
this->setDragDropMode(QAbstractItemView::DragDrop);
this->setDragEnabled(true);
this->setAcceptDrops(true);
//选中一个Item
this->setSelectionBehavior(QAbstractItemView::SelectItems);
} MyQTableWidget::~MyQTableWidget()
{ } void MyQTableWidget::mousePressEvent(QMouseEvent *event)
{
m_spos = event->pos();
sitem = new QTableWidgetItem();
sitem = QTableWidget::itemAt(m_spos);
if (sitem == NULL)
{
return;
}
temp = sitem->text();
QTableWidget::mousePressEvent(event);
} void MyQTableWidget::dropEvent(QDropEvent *event)
{
m_dpos = event->pos();
ditem = new QTableWidgetItem();
ditem = QTableWidget::itemAt(m_dpos);
if (ditem == NULL)
{
return;
}
if (sitem->data(Qt::ToolTip).toString() == "this is tooltip" && ditem->data(Qt::ToolTip).toString() == "")
{
int r = sitem->row();
int c = sitem->column();
delete sitem;
QTableWidgetItem* itemTemp = new QTableWidgetItem();
itemTemp->setText(ditem->text());
itemTemp->setData(Qt::ToolTip, "");
// 文本背景色设置为白色
itemTemp->setBackgroundColor(QColor(0xFF, 0xFF, 0xFF));
itemTemp->setTextAlignment(Qt::AlignHCenter|Qt::AlignVCenter);
this->setItem(r, c, itemTemp); ditem->setText(temp);
ditem->setCheckState(Qt::Unchecked);
ditem->setData(Qt::ToolTip, "this is tooltip");
ditem->setBackgroundColor(QColor(0x00, 0xFF, 0x00));
}
else if (sitem->data(Qt::ToolTip).toString() == "this is tooltip" && ditem->data(Qt::ToolTip).toString() == "this is tooltip")
{
sitem->setText(ditem->text());
ditem->setText(temp);
}
else if (sitem->data(Qt::ToolTip).toString() == "" && ditem->data(Qt::ToolTip).toString() == "this is tooltip")
{
sitem->setText(ditem->text());
sitem->setCheckState(Qt::Unchecked);
sitem->setData(Qt::ToolTip, "this is tooltip");
sitem->setBackgroundColor(QColor(0x00, 0xFF, 0x00)); int r = ditem->row();
int c = ditem->column();
delete ditem;
QTableWidgetItem* itemTemp = new QTableWidgetItem();
itemTemp->setText(temp);
itemTemp->setData(Qt::ToolTip, "");
// 文本背景色设置为白色
itemTemp->setBackgroundColor(QColor(0xFF, 0xFF, 0xFF));
itemTemp->setTextAlignment(Qt::AlignHCenter|Qt::AlignVCenter);
this->setItem(r, c, itemTemp);
} QTableWidget::dropEvent(event);
}