Qt工作笔记-代理及自定义委托，实现开关功能

整体源码下载如下：

https://download.csdn.net/download/qq78442761/10810431

效果图如下：

源码如下：

adddialog.h

#ifndef ADDDIALOG_H
#define ADDDIALOG_H#include <QDialog>struct AddData{QString name;QString shellFilePath;
};namespace Ui {
class AddDialog;
}class AddDialog : public QDialog
{Q_OBJECTpublic:AddDialog(QWidget *parent = 0);AddData *getAddData();void setNameAndFilePath(const QString name, const QString filePath);~AddDialog();protected:void closeEvent(QCloseEvent *event);protected slots:void okBtnClicked();void selectBtnClicked();private:Ui::AddDialog *ui;AddData *m_addData;
};#endif // ADDDIALOG_H

fileoper.h

#ifndef FILEOPER_H
#define FILEOPER_H#include <QString>
#include <QVector>class FileOper
{
public:FileOper(const QString fileName);~FileOper();QVector<QString> &getContextVec();void clearContextVec();void saveFile();void readFile();private:QString m_fileName;QVector<QString> m_contextVec;
};#endif // FILEOPER_H

mydelegate.h

#ifndef MYDELEGATE_H
#define MYDELEGATE_H#include <QStyledItemDelegate>class MyDelegate : public QStyledItemDelegate
{Q_OBJECT
public:explicit MyDelegate(QWidget *parent = 0);void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index)const;QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const;QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const;void setEditorData(QWidget *editor, const QModelIndex &index) const;void setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const;protected:void paint();
};#endif // MYDELEGATE_H

myonoff.h

#ifndef MYONOFF_H
#define MYONOFF_H#include <QMetaType>
#include <QRect>QT_BEGIN_NAMESPACE
class QPainter;
QT_END_NAMESPACEclass MyOnOff
{
public:enum EditMode {Editable, ReadOnly};MyOnOff(const bool isOpenStatus = false);bool getIsOpenStatus();void setIsOpenStatus(const bool isOpenStatus);void painter(QPainter *painter, const QRect &rect, const QPalette palette, EditMode mode) const;private:bool m_isOpen;
};Q_DECLARE_METATYPE(MyOnOff)#endif // MYONOFF_H

myonoffeditor.h

#ifndef MYONOFFEDITOR_H
#define MYONOFFEDITOR_H#include <QWidget>
#include "myonoff.h"class MyOnOffEditor : public QWidget
{Q_OBJECT
public:explicit MyOnOffEditor(QWidget *parent = 0);void setMyOnOffStatus(const bool myOnOffStatus);bool getMyOnOffStatus();protected:void paintEvent(QPaintEvent *event) Q_DECL_OVERRIDE;private:MyOnOff m_myOnOff;
};#endif // MYONOFFEDITOR_H

mytreeview.h

#ifndef MYTREEVIEW_H
#define MYTREEVIEW_H#include <QTreeView>
#include <QVector>class MyTreeView : public QTreeView
{Q_OBJECT
public:MyTreeView(QWidget *parent = 0);void initWidget(const QVector<QString> vec);protected:void contextMenuEvent(QContextMenuEvent *event);void addItem(const QString name, const QString filePath);protected slots:void addContextMenuCalled();void removeContextMenuCalled();void doubleCilckedCalled(const QModelIndex &index);private:int m_currentSelectRow;};#endif // MYTREEVIEW_H

widget.h

#ifndef WIDGET_H
#define WIDGET_H#include <QWidget>
#include <QRect>QT_BEGIN_NAMESPACE
class QCloseEvent;
QT_END_NAMESPACEclass FileOper;namespace Ui {
class Widget;
}class Widget : public QWidget
{Q_OBJECTpublic:explicit Widget(QWidget *parent = 0);~Widget();protected:void initWidget();void closeEvent(QCloseEvent *event);private:Ui::Widget *ui;QRect m_screenRect;FileOper *m_fileOper;
};#endif // WIDGET_H

adddialog.cpp

#include "adddialog.h"
#include "ui_adddialog.h"
#include <QFileDialog>
#include <QMessageBox>
#include <QDebug>AddDialog::AddDialog(QWidget *parent) :QDialog(parent),ui(new Ui::AddDialog)
{ui->setupUi(this);m_addData = new AddData;this->setWindowTitle("添加");ui->selectShellLineEdit->setEnabled(false);connect(ui->okPushButton, SIGNAL(clicked(bool)), this, SLOT(okBtnClicked()));connect(ui->selectPushButton, SIGNAL(clicked(bool)), this, SLOT(selectBtnClicked()));
}AddData *AddDialog::getAddData()
{return m_addData;
}void AddDialog::setNameAndFilePath(const QString name, const QString filePath)
{this->setWindowTitle("编辑");ui->nameLineEdit->setText(name);ui->selectShellLineEdit->setText(filePath);
}AddDialog::~AddDialog()
{delete ui;delete m_addData;
}void AddDialog::closeEvent(QCloseEvent *event)
{Q_UNUSED(event)this->reject();
}void AddDialog::okBtnClicked(){if(ui->nameLineEdit->text().isEmpty() || ui->selectShellLineEdit->text().isEmpty()){QMessageBox::information(this, "提示", "LineEdit不能为空");return;}int btnClicked = QMessageBox::information(this, "提示", "是否确定保存?", QMessageBox::Save, QMessageBox::Cancel);if(btnClicked == QMessageBox::Save){m_addData->name = ui->nameLineEdit->text();m_addData->shellFilePath = ui->selectShellLineEdit->text();this->accept();}
}void AddDialog::selectBtnClicked()
{QString fileName = QFileDialog::getOpenFileName(this, "选择shell文件", "/home", "Shell Files(*.sh)");ui->selectShellLineEdit->setText(fileName);
}

fileoper.cpp

#include "fileoper.h"
#include <QDebug>
#include <QTextStream>
#include <QFile>FileOper::FileOper(const QString fileName)
{m_fileName = fileName;
}FileOper::~FileOper()
{qDebug()<< "~FileOper() called";
}QVector<QString> &FileOper::getContextVec()
{return m_contextVec;
}void FileOper::clearContextVec()
{m_contextVec.clear();
}void FileOper::saveFile()
{QFile file(m_fileName);if(!file.open(QFile::WriteOnly | QFile::Text)){throw "file can't open";}QTextStream out(&file);for(int i = 0; i < m_contextVec.size(); i++){out << m_contextVec[i] << "\n";}file.close();
}void FileOper::readFile()
{QFile file(m_fileName);if(!file.open(QFile::ReadOnly | QFile::Text)){throw "file open failed";}QTextStream in(&file);while(!in.atEnd()){m_contextVec << in.readLine();}file.close();
}

main.cpp

#include "widget.h"
#include <QApplication>int main(int argc, char *argv[])
{QApplication a(argc, argv);Widget w;w.show();return a.exec();
}

mydelegate.cpp

#include "mydelegate.h"
#include "myonoff.h"
#include "myonoffeditor.h"#include <QPainter>
#include <QDebug>
#include <QTextItem>MyDelegate::MyDelegate(QWidget *parent) : QStyledItemDelegate(parent)
{}void MyDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
{if(index.column() == 1){if(option.state & QStyle::State_Selected){painter->fillRect(option.rect, option.palette.highlight());}painter->save();painter->setPen(Qt::black);painter->drawText(option.rect.x(), option.rect.y(), option.rect.width(), option.rect.height(), Qt::AlignCenter, "双击查看及修改文件路径");painter->restore();}else if(index.data().canConvert<MyOnOff>()){if(option.state & QStyle::State_Selected){painter->fillRect(option.rect, option.palette.highlight());}MyOnOff myOnOff = qvariant_cast<MyOnOff>(index.data());myOnOff.painter(painter, option.rect, option.palette, MyOnOff::ReadOnly);}else{QStyledItemDelegate::paint(painter, option, index);}
}QSize MyDelegate::sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const
{QSize size = QStyledItemDelegate::sizeHint(option, index);size.setHeight(size.height() + 12);return size;
}QWidget *MyDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const
{Q_UNUSED(option)if(index.data().canConvert<MyOnOff>()){MyOnOffEditor *editor = new MyOnOffEditor(parent);MyOnOff myOnOff = qvariant_cast<MyOnOff>(index.data());editor->setMyOnOffStatus(myOnOff.getIsOpenStatus());return editor;}else{return NULL;}
}void MyDelegate::setEditorData(QWidget *editor, const QModelIndex &index) const
{Q_UNUSED(index)if(index.data().canConvert<MyOnOff>()){MyOnOff myOnOff = qvariant_cast<MyOnOff>(index.data());MyOnOffEditor *myOnOffEditor = qobject_cast<MyOnOffEditor*>(editor);myOnOffEditor->setMyOnOffStatus(!myOnOff.getIsOpenStatus());}else{QStyledItemDelegate::setEditorData(editor, index);}
}void MyDelegate::setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const
{if(index.data().canConvert<MyOnOff>()){MyOnOffEditor *myOnOffEditor = qobject_cast<MyOnOffEditor*>(editor);model->setData(index, QVariant::fromValue(MyOnOff(myOnOffEditor->getMyOnOffStatus())));}elseQStyledItemDelegate::setModelData(editor, model, index);
}

myonoff.cpp

#include "myonoff.h"
#include <QImage>
#include <QPainter>
#include <QPalette>
#include <QDebug>MyOnOff::MyOnOff(const bool isOpenStatus)
{m_isOpen = isOpenStatus;
}bool MyOnOff::getIsOpenStatus()
{return m_isOpen;
}void MyOnOff::setIsOpenStatus(const bool isOpenStatus)
{m_isOpen = isOpenStatus;
}void MyOnOff::painter(QPainter *painter, const QRect &rect, const QPalette palette, EditMode mode) const
{painter->setRenderHint(QPainter::Antialiasing, true);painter->save();if(mode == Editable){painter->setBrush(palette.highlight());}else{painter->setBrush(palette.foreground());}if(m_isOpen){painter->drawImage(rect.x() + 45, rect.y(), QImage(":/img/imgOpen.png"));}else{painter->drawImage(rect.x() + 45, rect.y(), QImage(":/img/imgClose.png"));}painter->restore();
}

myonoffeditro.cpp

#include "myonoffeditor.h"
#include <QPainter>
#include <QDebug>MyOnOffEditor::MyOnOffEditor(QWidget *parent) : QWidget(parent)
{setMouseTracking(true);setAutoFillBackground(true);
}void MyOnOffEditor::setMyOnOffStatus(const bool myOnOffStatus)
{m_myOnOff.setIsOpenStatus(myOnOffStatus);
}bool MyOnOffEditor::getMyOnOffStatus()
{return m_myOnOff.getIsOpenStatus();
}void MyOnOffEditor::paintEvent(QPaintEvent *event)
{Q_UNUSED(event)QPainter painter(this);painter.save();m_myOnOff.painter(&painter, rect(), this->palette(), MyOnOff::Editable);painter.restore();
}

mytreeview.cpp

#include "mytreeview.h"
#include <QContextMenuEvent>
#include <QMenu>
#include <QDebug>
#include <QStandardItemModel>#include <QAbstractItemModel>
#include <QModelIndex>
#include "adddialog.h"
#include "myonoff.h"MyTreeView::MyTreeView(QWidget *parent): QTreeView(parent)
{m_currentSelectRow = -1;connect(this, SIGNAL(doubleClicked(QModelIndex)), this, SLOT(doubleCilckedCalled(QModelIndex)));
}void MyTreeView::initWidget(const QVector<QString> vec)
{for(int i = 0; i < vec.size(); i++){QStringList nameAndPath = vec[i].split(";");addItem(nameAndPath[0], nameAndPath[1]);}
}void MyTreeView::contextMenuEvent(QContextMenuEvent *event)
{QMenu menu;menu.addAction("添加", this, SLOT(addContextMenuCalled()));static_cast<QStandardItemModel*>(model());QModelIndex index = indexAt(event->pos());if(index.isValid()){m_currentSelectRow = index.row();menu.addAction("删除", this, SLOT(removeContextMenuCalled()));}menu.exec(event->globalPos());
}void MyTreeView::addItem(const QString name, const QString filePath)
{int rowCount = model()->rowCount();static_cast<QStandardItemModel*>(model())->setItem(rowCount, 0, new QStandardItem(name));static_cast<QStandardItemModel*>(model())->setItem(rowCount, 1, new QStandardItem(filePath));QStandardItem *myOnOff = new QStandardItem;myOnOff->setData(QVariant::fromValue(MyOnOff(false)), 0);static_cast<QStandardItemModel*>(model())->setItem(rowCount, 2, myOnOff);
}void MyTreeView::addContextMenuCalled()
{AddDialog addDialog;if(addDialog.exec() == QDialog::Accepted){//qDebug()<< addDialog.getAddData()->name << "\t" <<addDialog.getAddData()->shellFilePath;addItem(addDialog.getAddData()->name, addDialog.getAddData()->shellFilePath);}}void MyTreeView::removeContextMenuCalled()
{if(m_currentSelectRow != -1){static_cast<QStandardItemModel*>(model())->removeRow(m_currentSelectRow);m_currentSelectRow = -1;}
}void MyTreeView::doubleCilckedCalled(const QModelIndex &index)
{if(index.column() == 1){QString name = static_cast<QStandardItemModel*>(model())->item(index.row(), 0)->data(0).toString();QString filePath = static_cast<QStandardItemModel*>(model())->item(index.row(), 1)->data(0).toString();AddDialog editDialog;editDialog.setNameAndFilePath(name, filePath);if(editDialog.exec() == QDialog::Accepted){QString newName = editDialog.getAddData()->name;QString newPath = editDialog.getAddData()->shellFilePath;static_cast<QStandardItemModel*>(model())->item(index.row(), 0)->setData(newName, 0);static_cast<QStandardItemModel*>(model())->item(index.row(), 1)->setData(newPath, 0);}}
}

widget.cpp

#include "widget.h"
#include "ui_widget.h"
#include "mydelegate.h"
#include "myonoff.h"
#include "fileoper.h"#include <QDesktopWidget>
#include <QVariant>
#include <QDebug>
#include <QCloseEvent>
#include <QHeaderView>
#include <QMessageBox>
#include <QStandardItemModel>Widget::Widget(QWidget *parent) :QWidget(parent),ui(new Ui::Widget)
{ui->setupUi(this);m_fileOper = new FileOper("context.txt");m_fileOper->readFile();initWidget();
}Widget::~Widget()
{delete ui;delete m_fileOper;
}void Widget::initWidget()
{m_screenRect = QApplication::desktop()->screenGeometry();move((m_screenRect.width() - this->width())/2, (m_screenRect.height() - this->height())/2);QStringList headerLables;headerLables << "名称" << "shell文件路径" << "当前状态";QStandardItemModel *stdModel = new QStandardItemModel;stdModel->setHorizontalHeaderLabels(headerLables);ui->treeView->setModel(stdModel);ui->treeView->setEditTriggers(QAbstractItemView::DoubleClicked);ui->treeView->setItemDelegate(new MyDelegate);ui->treeView->initWidget(m_fileOper->getContextVec());ui->treeView->header()->setSectionResizeMode(1, QHeaderView::Stretch);ui->treeView->header()->setSectionResizeMode(0, QHeaderView::Fixed);ui->treeView->header()->setSectionResizeMode(2, QHeaderView::Fixed);
}void Widget::closeEvent(QCloseEvent *event)
{int result = QMessageBox::information(this, "提示", "是否保存", QMessageBox::Ok, QMessageBox::Cancel);if(result == QMessageBox::Ok){m_fileOper->clearContextVec();for(int i = 0; i < ui->treeView->model()->rowCount(); i++){QString name = static_cast<QStandardItemModel*>(ui->treeView->model())->item(i, 0)->data(0).toString();QString path = static_cast<QStandardItemModel*>(ui->treeView->model())->item(i, 1)->data(0).toString();m_fileOper->getContextVec() << name + ";" + path;}try{m_fileOper->saveFile();qApp->exit();}catch(const char *err){qDebug()<< err;}}else if(result == QMessageBox::Cancel){qApp->exit();}else{}event->ignore();
}

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