feat: QStandardItemModel and QStyleItemDelegate

QtQStandardItemModelEx/ExDelegate.cpp

@@ -0,0 +1,42 @@
+#include "ExDelegate.h"
+#include <QComboBox>
+
+ExDelegate::ExDelegate()
+{
+}
+
+
+//创建用于编辑的模型数据的widget组件，如一个QComboBox组件
+QWidget *ExDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const
+{
+    QComboBox *comboBox = new QComboBox(parent);
+    comboBox->addItem("github：https://github.com/touwoyimuli");
+    comboBox->addItem("csdn博客：https://blog.csdn.net/qq_33154343");
+    comboBox->addItem("github.io博客：https://touwoyimuli.github.io/");
+    comboBox->addItem("https://www.google.com/ qt 学习 加油 2019-09-30");
+
+    return  comboBox;                      //返回此编辑器
+}
+
+//从数据模型获取数据，显示在代理组件之中，让其编辑
+void ExDelegate::setEditorData(QWidget *editor, const QModelIndex &index) const
+{
+    QString str = index.model()->data(index, Qt::EditRole).toString();
+    QComboBox *comboBox = static_cast<QComboBox *>(editor);
+    comboBox->addItem(str);
+    //其他组件的话， 此处可以设定写的值一类，eg：setText(str)  setValue()
+}
+
+//将widget上的数据更新到数据模型
+void ExDelegate::setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const
+{
+    QComboBox *comboBox = static_cast<QComboBox *>(editor);
+    QString str = comboBox->currentText();
+    model->setData(index, str, Qt::EditRole);
+}
+
+//用于给widget组件设置一个合适的大小
+void ExDelegate::updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index) const
+{
+    editor->setGeometry(option.rect);      //设置组件的大小
+}

QtQStandardItemModelEx/ExDelegate.h

@@ -0,0 +1,20 @@
+#ifndef EXDELEGATE_H
+#define EXDELEGATE_H
+
+#include <QStyledItemDelegate>
+
+
+class ExDelegate : public QStyledItemDelegate
+{
+public:
+    ExDelegate();
+
+public:
+    //若是写代理的组件，那么必须要有下面这是个重写这四个函数
+    virtual QWidget* createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const override;      //创建用于编辑的模型数据的widget组件，如一个QComboBox组件
+    virtual void setEditorData(QWidget *editor, const QModelIndex &index) const override;                                             //从数据模型获取数据，显示在代理组件editor之中，让其编辑
+    virtual void setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const override;                   //代理组件editor上的数据更新到数据模型
+    virtual void updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index) const override;  //用于给widget组件设置一个合适的大小
+};
+
+#endif // EXDELEGATE_H

QtQStandardItemModelEx/ExQStandardItemModel.cpp

@@ -61,10 +61,18 @@ void ExQStandardItemModel::init(QStringList &list)
         tempList = aLineText.split(QRegExp("\\s+"), QString::SkipEmptyParts);//正则表达式中\s匹配任何空白字符，包括空格、制表符、换页符等等, 等价于[ \f\n\r\t\v]
 
         for ( j = 0; j < COLUMN - 1; j++) {                                     //设置前5列的item
+
+            if (j == 3) {
+                ExDelegate *itemDelegate = new ExDelegate();
+                ui->tableView->setItemDelegateForColumn(3, itemDelegate);
+            }
+
             item = new QStandardItem(tempList.at(j));
             m_model->setItem(i - 1, j, item);
         }
 
+
+
         item = new QStandardItem(tempList.at(j));                          //最后一列的item
         item->setCheckable(true);                                          //设置有检查框
 

QtQStandardItemModelEx/ExQStandardItemModel.h

@@ -6,6 +6,8 @@
 #include <QStandardItemModel>
 #include <QItemSelectionModel>
 
+#include "ExDelegate.h"
+
 namespace Ui {
 class ExQStandardItemModel;
 }

QtQStandardItemModelEx/QtQStandardItemModelEx.pro

@@ -26,10 +26,12 @@ CONFIG += c++11
 
 SOURCES += \
         main.cpp \
-        ExQStandardItemModel.cpp
+        ExQStandardItemModel.cpp \
+    ExDelegate.cpp
 
 HEADERS += \
-        ExQStandardItemModel.h
+        ExQStandardItemModel.h \
+    ExDelegate.h
 
 FORMS += \
         ExQStandardItemModel.ui