QTableView的一行里添加两个按钮

本文主要是介绍QTableView的一行里添加两个按钮，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

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作者：李鹏
出处：http://www.cnblogs.com/li-peng/
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看一下列的效果

看一下添加两个按钮的效果：
点击第一个按钮弹出 but1 +当前列

点击第二个按钮弹出but2 + 当前行

下面是主要实现

继承自 QItemDelegate

主要是实现 了它的painter方法，把两个自定义的按钮绘制到视图并保存

还有editorEvent事件，用来处理点击事件，在点击时我们算一下鼠标的坐标在哪个按钮下，

再处理相应的点击事件

#ifndef BUTTONDELEGATE_H
#define BUTTONDELEGATE_H#include <QItemDelegate>class ButtonDelegate : public QItemDelegate
{Q_OBJECT
public:explicit ButtonDelegate(QObject *parent = 0);void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const;bool editorEvent(QEvent *event, QAbstractItemModel *model, const QStyleOptionViewItem &option, const QModelIndex &index);signals:public slots:private:void showMsg(QString str);private:typedef QMap<QModelIndex, QPair<QStyleOptionButton*, QStyleOptionButton*>* >  collButtons;collButtons m_btns;};#endif // BUTTONDELEGATE_H

按钮的具体实现

#include "buttondelegate.h"#include <QApplication>
#include <QMouseEvent>
#include <QMessageBox>
#include <QPainter>
#include <QStyleOption>
#include <QDesktopWidget>ButtonDelegate::ButtonDelegate(QObject *parent) :QItemDelegate(parent)
{
}void ButtonDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
{QPair<QStyleOptionButton*, QStyleOptionButton*>* buttons = m_btns.value(index);if (!buttons) {QStyleOptionButton* button1 = new QStyleOptionButton();//button1->rect = option.rect.adjusted(4, 4, -(option.rect.width() / 2 + 4) , -4); //button1->text = "X";button1->state |= QStyle::State_Enabled;QStyleOptionButton* button2 = new QStyleOptionButton();//button2->rect = option.rect.adjusted(button1->rect.width() + 4, 4, -4, -4);button2->text = "Y";button2->state |= QStyle::State_Enabled;buttons =new  QPair<QStyleOptionButton*, QStyleOptionButton*>(button1, button2);(const_cast<ButtonDelegate *>(this))->m_btns.insert(index, buttons);}buttons->first->rect = option.rect.adjusted(4, 4, -(option.rect.width() / 2 + 4) , -4); //buttons->second->rect = option.rect.adjusted(buttons->first->rect.width() + 4, 4, -4, -4);painter->save();if (option.state & QStyle::State_Selected) {painter->fillRect(option.rect, option.palette.highlight());}painter->restore();QApplication::style()->drawControl(QStyle::CE_PushButton, buttons->first, painter);QApplication::style()->drawControl(QStyle::CE_PushButton, buttons->second, painter);
}bool ButtonDelegate::editorEvent(QEvent *event, QAbstractItemModel *model, const QStyleOptionViewItem &option, const QModelIndex &index)
{if (event->type() == QEvent::MouseButtonPress) {QMouseEvent* e =(QMouseEvent*)event;if (m_btns.contains(index)) {QPair<QStyleOptionButton*, QStyleOptionButton*>* btns = m_btns.value(index);if (btns->first->rect.contains(e->x(), e->y())) {btns->first->state |= QStyle::State_Sunken;}else if(btns->second->rect.contains(e->x(), e->y())) {btns->second->state |= QStyle::State_Sunken;}}}if (event->type() == QEvent::MouseButtonRelease) {QMouseEvent* e =(QMouseEvent*)event;if (m_btns.contains(index)) {QPair<QStyleOptionButton*, QStyleOptionButton*>* btns = m_btns.value(index);if (btns->first->rect.contains(e->x(), e->y())) {btns->first->state &= (~QStyle::State_Sunken);showMsg(tr("btn1 column %1").arg(index.column()));} else if(btns->second->rect.contains(e->x(), e->y())) {btns->second->state &= (~QStyle::State_Sunken);showMsg(tr("btn2 row %1").arg(index.row()));}}}
}void ButtonDelegate::showMsg(QString str)
{QMessageBox msg;msg.setText(str);msg.exec();
}

好了自定义按钮处理完了

我们建一个Table添加一些数据

#ifndef TABLEMODEL_H
#define TABLEMODEL_H#include <QAbstractTableModel>class TableModel : public QAbstractTableModel
{Q_OBJECT
public:explicit TableModel(QObject *parent = 0);int rowCount(const QModelIndex &parent) const;int columnCount(const QModelIndex &parent) const;QVariant data(const QModelIndex &index, int role) const;Qt::ItemFlags flags(const QModelIndex &index) const;void setHorizontalHeader(const QStringList& headers);QVariant headerData(int section, Qt::Orientation orientation, int role) const;void setData(const QVector<QStringList>& data);QVector<QStringList>& DataVector() {return m_data;}~TableModel(void);signals:public slots:private:QStringList m_HorizontalHeader;QVector<QStringList> m_data;
};#endif // TABLEMODEL_H

model的实现 并添加一些数据

#include "tablemodel.h"TableModel::TableModel(QObject *parent) :QAbstractTableModel(parent)
{
}TableModel::~TableModel()
{}int TableModel::rowCount(const QModelIndex &parent) const
{return m_data.size();
}int TableModel::columnCount(const QModelIndex &parent) const
{return m_HorizontalHeader.count();
}QVariant TableModel::data(const QModelIndex &index, int role) const
{if (!index.isValid())return QVariant();if (role == Qt::DisplayRole) {int ncol = index.column();int nrow =  index.row();QStringList values = m_data.at(nrow);if (values.size() > ncol)return values.at(ncol);elsereturn QVariant();}return QVariant();
}Qt::ItemFlags TableModel::flags(const QModelIndex &index) const
{if (!index.isValid())return Qt::NoItemFlags;Qt::ItemFlags flag = QAbstractItemModel::flags(index);// flag|=Qt::ItemIsEditable // 设置单元格可编辑,此处注释,单元格无法被编辑return flag;
}void TableModel::setHorizontalHeader(const QStringList &headers)
{m_HorizontalHeader =  headers;
}QVariant TableModel::headerData(int section, Qt::Orientation orientation, int role) const
{if (role == Qt::DisplayRole && orientation == Qt::Horizontal) {return m_HorizontalHeader.at(section);}return QAbstractTableModel::headerData(section, orientation, role);
}void TableModel::setData(const QVector<QStringList> &data)
{m_data = data;
}

TableView的实现，和model关联

#ifndef TABLEVIEW_H
#define TABLEVIEW_H#include <QTableView>
#include "tablemodel.h"
#include "buttondelegate.h"class TableView : public QTableView
{Q_OBJECT
public:explicit TableView(QWidget *parent = 0);TableModel* tableModel() {return m_model;}~TableView();signals:public slots:private:void iniData();private:TableModel *m_model;ButtonDelegate *m_buttonDelegate;};#endif // TABLEVIEW_H

#include "tableview.h"#include "tablemodel.h"
#include "buttondelegate.h"TableView::TableView(QWidget *parent) :QTableView(parent)
{iniData();
}TableView::~TableView()
{delete m_model;
}void TableView::iniData()
{m_model = new TableModel();this->setModel(m_model);QStringList headers;headers << "Id" << "Progress";m_model->setHorizontalHeader(headers);QVector<QStringList> data;data.append(QStringList() << "1" << "22");data.append(QStringList() << "2" << "32");data.append(QStringList() << "3" << "2");data.append(QStringList() << "4" << "80");data.append(QStringList() << "5" << "40");m_model->setData(data);m_buttonDelegate = new ButtonDelegate(this);this->setItemDelegateForColumn(1, m_buttonDelegate);emit m_model->layoutChanged();this->setColumnWidth(1, 500);
}

这就完成了

我们看一下调用

this->resize(800, 600);TableView *tv = new TableView(this);QVBoxLayout* layout = new QVBoxLayout();layout->addWidget(tv);this->setLayout(layout);

这篇关于QTableView的一行里添加两个按钮的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！

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