Qt 二进制文件的读写

Qt 二进制文件的读写

开发工具：VS2013 +QT5.8.0

实例功能概述

1、新建项目“sample7_2binFile”

完成以上步骤后，生成以下文件：

2、界面设计

如何添加资源文件：

鼠标双击“***.qrc”文件 弹出以下界面：

点击 “Add File” 找到要添加的 icons 所在位置，全选，“打开” 即添加上，别忘了点 “保存”

如何在工具栏添加QAction

先在菜单栏添加需要添加的QAction，然后把它拖放到工具栏上

可视化UI设计，完成后的界面如下图所示：

添加 Qt Class “QWComboBoxDelegate”

QWComboBoxDelegate.h 文件

#pragma once

#include <QItemDelegate>

class QWComboBoxDelegate : public QItemDelegate
{
	Q_OBJECT

public:
	QWComboBoxDelegate(QObject *parent=0);
	~QWComboBoxDelegate();


	//自定义代理组件必须继承以下4个函数
	QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option,
		const QModelIndex &index) const Q_DECL_OVERRIDE;

	void setEditorData(QWidget *editor, const QModelIndex &index) const Q_DECL_OVERRIDE;

	void setModelData(QWidget *editor, QAbstractItemModel *model,
		const QModelIndex &index) const Q_DECL_OVERRIDE;

	void updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option,
		const QModelIndex &index) const Q_DECL_OVERRIDE;

};

QWComboBoxDelegate.cpp 文件

#include "QWComboBoxDelegate.h"

#include    <QComboBox>


//解决QT中中文显示乱码问题
#pragma execution_character_set("utf-8")

QWComboBoxDelegate::QWComboBoxDelegate(QObject *parent)
	: QItemDelegate(parent)
{
}

QWComboBoxDelegate::~QWComboBoxDelegate()
{
}


QWidget *QWComboBoxDelegate::createEditor(QWidget *parent,
	const QStyleOptionViewItem &option, const QModelIndex &index) const
{
	Q_UNUSED(option);
	Q_UNUSED(index);

	QComboBox *editor = new QComboBox(parent);

	editor->addItem("优");
	editor->addItem("良");
	editor->addItem("一般");
	editor->addItem("不合格");

	return editor;
}

void QWComboBoxDelegate::setEditorData(QWidget *editor, const QModelIndex &index) const
{
	QString str = index.model()->data(index, Qt::EditRole).toString();

	QComboBox *comboBox = static_cast<QComboBox*>(editor);
	comboBox->setCurrentText(str);
}

void QWComboBoxDelegate::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);
}

void QWComboBoxDelegate::updateEditorGeometry(QWidget *editor,
	const QStyleOptionViewItem &option, const QModelIndex &index) const
{
	Q_UNUSED(index);
	editor->setGeometry(option.rect);
}

添加 Qt Class “QWFloatSpinDelegate”

QWFloatSpinDelegate.h 文件

#pragma once

#include <QStyledItemDelegate>

class QWFloatSpinDelegate : public QStyledItemDelegate
{
	Q_OBJECT

public:
	QWFloatSpinDelegate(QObject *parent=0);
	~QWFloatSpinDelegate();

	//自定义代理组件必须继承以下4个函数
	//创建编辑组件
	QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option,
		const QModelIndex &index) const Q_DECL_OVERRIDE;

	void setEditorData(QWidget *editor, const QModelIndex &index) const Q_DECL_OVERRIDE;

	void setModelData(QWidget *editor, QAbstractItemModel *model,
		const QModelIndex &index) const Q_DECL_OVERRIDE;

	void updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option,
		const QModelIndex &index) const Q_DECL_OVERRIDE;
};

QWFloatSpinDelegate.cpp 文件

#include "QWFloatSpinDelegate.h"

#include  <QDoubleSpinBox>


//解决QT中中文显示乱码问题
#pragma execution_character_set("utf-8")

QWFloatSpinDelegate::QWFloatSpinDelegate(QObject *parent)
	: QStyledItemDelegate(parent)
{
}

QWFloatSpinDelegate::~QWFloatSpinDelegate()
{
}

QWidget *QWFloatSpinDelegate::createEditor(QWidget *parent,
	const QStyleOptionViewItem &option, const QModelIndex &index) const
{
	Q_UNUSED(option);
	Q_UNUSED(index);

	QDoubleSpinBox *editor = new QDoubleSpinBox(parent);
	editor->setFrame(false);
	editor->se