Qt：让控件（widgets）内容可以自动 保存/读取 到配置文件（QSettings）中

有时候，我们会有很多很多的控件数据需要保存，比如说QLineEdit的text，或者说QSpinBox的value

手动去维护，太烦人

于是，我就整理了一下，让数据可以自动的保存和读取

说明一下，我这里没有写完所有的控件，但是框架我已经给你搭好了，希望能给你启迪

.h文件

#include <QWidget>#include <QLineEdit>#include <QTextEdit>#include <QSpinBox>#include <QDoubleSpinBox>#include <QTimeEdit>#include <QDateEdit>#include <QDateTimeEdit>#include <QDial>#include <QSlider>#include <QAbstractSlider>#include <QLabel>#include <QTextBrowser>#include <QLCDNumber>#include <QProgressBar>#include <QRadioButton>#include <QCheckBox>class JasonQt_Settings_WidgetDataControl{public:    enum controlFlagsEnum    {        controlFlagsRecursion       = 0x1,        controlFlagsPos             = 0x2,        controlFlagsSize            = 0x4,        controlFlagsGeometry        = 0x6,        controlFlagsEnabled         = 0x8,        controlFlagsQLineEdit       =   0x10,        controlFlagsQTextEdit       =   0x20,        controlFlagsQSpinBox        =   0x40,        controlFlagsQDoubleSpinBox  =   0x80,        controlFlagsQTimeEdit       =  0x100,        controlFlagsQDateEdit       =  0x200,        controlFlagsQDateTimeEdit   =  0x400,        controlFlagsQDial           =  0x800,        controlFlagsQSlider         = 0x1000,        controlFlagsQAbstractSlider = 0x2000,        controlFlagsInputWidgets    = 0xfff0,        controlFlagsQLabel          = 0x10000,        controlFlagsQTextBrowser    = 0x20000,        controlFlagsQLCDNumber      = 0x40000,        controlFlagsQProgressBar    = 0x80000,        controlFlagsDisplayWidgets  = 0xf0000,        controlFlagsQRadioButton    = 0x1000000,        controlFlagsQCheckBox       = 0x2000000,        controlFlagsButtons         = 0xf000000,        controlFlagsAll             = 0xffffffff    };public:    static void save(QSettings *settings, const QWidget *widget, const controlFlagsEnum &controlFlags);    static void read(QSettings *settings, QWidget *widget, const controlFlagsEnum &controlFlags);};

.cpp文件

void JasonQt_Settings_WidgetDataControl::save(QSettings *settings, const QWidget *widget, const controlFlagsEnum &controlFlags){    if(widget->objectName().isEmpty()) { return; }    settings->beginGroup(widget->objectName());    const QObjectList children = widget->children();    foreach(QObject *now, children)    {        if(now->objectName().isEmpty()) { continue; }        if(now->objectName().indexOf("qt_") == 0) { continue; }        if((controlFlags & controlFlagsPos) && now->inherits("QWidget"))        {            settings->setValue(now->objectName() + ".pos", qobject_cast<QWidget *>(now)->pos());        }        if((controlFlags & controlFlagsSize) && now->inherits("QWidget"))        {            settings->setValue(now->objectName() + ".size", qobject_cast<QWidget *>(now)->size());        }        if((controlFlags & controlFlagsEnabled) && now->inherits("QWidget"))        {            settings->setValue(now->objectName() + ".enabled", qobject_cast<QWidget *>(now)->isEnabled());        }        if((controlFlags & controlFlagsQLineEdit) && now->inherits("QLineEdit"))        {            settings->setValue(now->objectName() + ".QLineEdit", qobject_cast<QLineEdit *>(now)->text());            continue;        }        if((controlFlags & controlFlagsQTextEdit) && now->inherits("QTextEdit"))        {            settings->setValue(now->objectName() + ".QTextEdit", qobject_cast<QTextEdit *>(now)->toPlainText());            continue;        }        if((controlFlags & controlFlagsQSpinBox) && now->inherits("QSpinBox"))        {            settings->setValue(now->objectName() + ".QSpinBox", qobject_cast<QSpinBox *>(now)->value());            continue;        }        if((controlFlags & controlFlagsQDoubleSpinBox) && now->inherits("QDoubleSpinBox"))        {            settings->setValue(now->objectName() + ".QDoubleSpinBox", qobject_cast<QDoubleSpinBox *>(now)->value());            continue;        }        if((controlFlags & controlFlagsQTimeEdit) && now->inherits("QTimeEdit"))        {            settings->setValue(now->objectName() + ".QTimeEdit", qobject_cast<QTimeEdit *>(now)->time());            continue;        }        if((controlFlags & controlFlagsQDateEdit) && now->inherits("QDateEdit"))        {            settings->setValue(now->objectName() + ".QDateEdit", qobject_cast<QDateEdit *>(now)->date());            continue;        }        if((controlFlags & controlFlagsQDateTimeEdit) && now->inherits("QDateTimeEdit"))        {            settings->setValue(now->objectName() + ".QDateTimeEdit", qobject_cast<QDateTimeEdit *>(now)->dateTime());            continue;        }        if((controlFlags & controlFlagsQDial) && now->inherits("QDial"))        {            settings->setValue(now->objectName() + ".QDial", qobject_cast<QDial *>(now)->value());            continue;        }        if((controlFlags & controlFlagsQSlider) && now->inherits("QSlider"))        {            settings->setValue(now->objectName() + ".QSlider", qobject_cast<QSlider *>(now)->value());            continue;        }        if((controlFlags & controlFlagsQAbstractSlider) && now->inherits("QAbstractSlider"))        {            settings->setValue(now->objectName() + ".QAbstractSlider", qobject_cast<QAbstractSlider *>(now)->value());            continue;        }        if((controlFlags & controlFlagsQLabel) && now->inherits("QLabel"))        {            settings->setValue(now->objectName() + ".QLabel", qobject_cast<QLabel *>(now)->text());            continue;        }        if((controlFlags & controlFlagsQTextBrowser) && now->inherits("QTextBrowser"))        {            settings->setValue(now->objectName() + ".QTextBrowser", qobject_cast<QTextBrowser *>(now)->toPlainText());            continue;        }        if((controlFlags & controlFlagsQLCDNumber) && now->inherits("QLCDNumber"))        {            settings->setValue(now->objectName() + ".QLCDNumber", qobject_cast<QLCDNumber *>(now)->value());            continue;        }        if((controlFlags & controlFlagsQProgressBar) && now->inherits("QProgressBar"))        {            settings->setValue(now->objectName() + ".QProgressBar", qobject_cast<QProgressBar *>(now)->value());            continue;        }        if((controlFlags & controlFlagsQRadioButton) && now->inherits("QRadioButton"))        {            settings->setValue(now->objectName() + ".QRadioButton", qobject_cast<QRadioButton *>(now)->isChecked());            continue;        }        if((controlFlags & controlFlagsQCheckBox) && now->inherits("QCheckBox"))        {            settings->setValue(now->objectName() + ".QCheckBox", qobject_cast<QCheckBox *>(now)->isChecked());            continue;        }    }    if(controlFlags & controlFlagsRecursion)    {        foreach(QObject *now, children)        {            if(now->inherits("QWidget"))            {                save(settings, qobject_cast<QWidget *>(now), controlFlags);            }        }    }    settings->endGroup();}void JasonQt_Settings_WidgetDataControl::read(QSettings *settings, QWidget *widget, const controlFlagsEnum &controlFlags){    if(widget->objectName().isEmpty()) { return; }    settings->beginGroup(widget->objectName());    const QObjectList children = widget->children();    foreach(QObject *now, children)    {        if(now->objectName().isEmpty()) { continue; }        if(now->objectName().indexOf("qt_") == 0) { continue; }        if((controlFlags & controlFlagsPos) && now->inherits("QWidget") && settings->contains(now->objectName() + ".pos"))        {            qobject_cast<QWidget *>(now)->move(settings->value(now->objectName() + ".pos").toPoint());        }        if((controlFlags & controlFlagsSize) && now->inherits("QWidget") && settings->contains(now->objectName() + ".size"))        {            qobject_cast<QWidget *>(now)->resize(settings->value(now->objectName() + ".size").toSize());        }        if((controlFlags & controlFlagsSize) && now->inherits("QWidget") && settings->contains(now->objectName() + ".enabled"))        {            qobject_cast<QWidget *>(now)->setEnabled(settings->value(now->objectName() + ".enabled").toBool());        }        if((controlFlags & controlFlagsQLineEdit) && now->inherits("QLineEdit") && settings->contains(now->objectName() + ".QLineEdit"))        {            qobject_cast<QLineEdit *>(now)->setText(settings->value(now->objectName() + ".QLineEdit").toString());            continue;        }        if((controlFlags & controlFlagsQTextEdit) && now->inherits("QTextEdit") && settings->contains(now->objectName() + ".QTextEdit"))        {            qobject_cast<QTextEdit *>(now)->setPlainText(settings->value(now->objectName() + ".QTextEdit").toString());            continue;        }        if((controlFlags & controlFlagsQSpinBox) && now->inherits("QSpinBox") && settings->contains(now->objectName() + ".QSpinBox"))        {            qobject_cast<QSpinBox *>(now)->setValue(settings->value(now->objectName() + ".QSpinBox").toInt());            continue;        }        if((controlFlags & controlFlagsQDoubleSpinBox) && now->inherits("QDoubleSpinBox") && settings->contains(now->objectName() + ".QDoubleSpinBox"))        {            qobject_cast<QDoubleSpinBox *>(now)->setValue(settings->value(now->objectName() + ".QDoubleSpinBox").toDouble());            continue;        }        if((controlFlags & controlFlagsQTimeEdit) && now->inherits("QTimeEdit") && settings->contains(now->objectName() + ".QTimeEdit"))        {            qobject_cast<QTimeEdit *>(now)->setTime(settings->value(now->objectName() + ".QTimeEdit").toTime());            continue;        }        if((controlFlags & controlFlagsQDateEdit) && now->inherits("QDateEdit") && settings->contains(now->objectName() + ".QDateEdit"))        {            qobject_cast<QDateEdit *>(now)->setDate(settings->value(now->objectName() + ".QDateEdit").toDate());            continue;        }        if((controlFlags & controlFlagsQDateTimeEdit) && now->inherits("QDateTimeEdit") && settings->contains(now->objectName() + ".QDateTimeEdit"))        {            qobject_cast<QDateTimeEdit *>(now)->setDateTime(settings->value(now->objectName() + ".QDateTimeEdit").toDateTime());            continue;        }        if((controlFlags & controlFlagsQDial) && now->inherits("QDial") && settings->contains(now->objectName() + ".QDial"))        {            qobject_cast<QDial *>(now)->setValue(settings->value(now->objectName() + ".QDial").toInt());            continue;        }        if((controlFlags & controlFlagsQSlider) && now->inherits("QSlider") && settings->contains(now->objectName() + ".QSlider"))        {            qobject_cast<QSlider *>(now)->setValue(settings->value(now->objectName() + ".QSlider").toInt());            continue;        }        if((controlFlags & controlFlagsQAbstractSlider) && now->inherits("QAbstractSlider") && settings->contains(now->objectName() + ".QAbstractSlider"))        {            qobject_cast<QAbstractSlider *>(now)->setValue(settings->value(now->objectName() + ".QAbstractSlider").toInt());            continue;        }        if((controlFlags & controlFlagsQLabel) && now->inherits("QLabel") && settings->contains(now->objectName() + ".QLabel"))        {            qobject_cast<QLabel *>(now)->setText(settings->value(now->objectName() + ".QLabel").toString());            continue;        }        if((controlFlags & controlFlagsQTextBrowser) && now->inherits("QTextBrowser") && settings->contains(now->objectName() + ".QTextBrowser"))        {            qobject_cast<QTextBrowser *>(now)->setText(settings->value(now->objectName() + ".QTextBrowser").toString());            continue;        }        if((controlFlags & controlFlagsQLCDNumber) && now->inherits("QLCDNumber") && settings->contains(now->objectName() + ".QLCDNumber"))        {            qobject_cast<QLCDNumber *>(now)->display(settings->value(now->objectName() + ".QLCDNumber").toInt());            continue;        }        if((controlFlags & controlFlagsQProgressBar) && now->inherits("QProgressBar") && settings->contains(now->objectName() + ".QProgressBar"))        {            qobject_cast<QProgressBar *>(now)->setValue(settings->value(now->objectName() + ".QProgressBar").toInt());            continue;        }        if((controlFlags & controlFlagsQRadioButton) && now->inherits("QRadioButton") && settings->contains(now->objectName() + ".QRadioButton"))        {            qobject_cast<QRadioButton *>(now)->setChecked(settings->value(now->objectName() + ".QRadioButton").toBool());            continue;        }        if((controlFlags & controlFlagsQCheckBox) && now->inherits("QCheckBox") && settings->contains(now->objectName() + ".QCheckBox"))        {            qobject_cast<QCheckBox *>(now)->setChecked(settings->value(now->objectName() + ".QCheckBox").toBool());            continue;        }    }    if(controlFlags & controlFlagsRecursion)    {        foreach(QObject *now, children)        {            if(now->inherits("QWidget"))            {                read(settings, qobject_cast<QWidget *>(now), controlFlags);            }        }    }    settings->endGroup();}

读取

QSettings settings("/Users/Jason/Test.txt", QSettings::IniFormat);JasonQt_Settings_WidgetDataControl::read(&settings, m_ui->centralWidget, JasonQt_Settings_WidgetDataControl::controlFlagsAll);

保存

QSettings settings("/Users/Jason/Test.txt", QSettings::IniFormat);JasonQt_Settings_WidgetDataControl::save(&settings, m_ui->centralWidget, JasonQt_Settings_WidgetDataControl::controlFlagsAll);

效果：