Qt to write custom controls 34- disk capacity statistics

I. Introduction

Statistical disk capacity control, plainly, a local drive letter is used to count the volume occupied by, including but not limited to the used space, the remaining space, the total size, and the like has a percentage, where the percentage corresponding to the progress bar display using the progress bar the foreground and background colors and text colors can be set, when the whole resurfacing will need to use.
Substantially no difficulty at all in the controls, and is compatible with WIN LINUX operating system, employed to read the WIN WINAPI, linux QProcess employed to execute the corresponding command (df -h) acquisition result, and then performs a timer, associated with the signal get return of the slot to the amount of data analysis, scenario control mainly in some of the above embedded devices allow users to check how much space is currently still remaining.

Second, the realization of functions

• 1: automatic loading of the total capacity of the local storage device / used capacity
• 2: displays a progress bar Capacity
• 3: supports all operating systems
• 4: Add U disk or SD card arrival signal

Third, renderings

Fourth, the header file code

#ifndef DEVICESIZETABLE_H
#define DEVICESIZETABLE_H

/**
 * 本地存储空间大小控件 作者:feiyangqingyun(QQ:517216493) 2016-11-30
 * 1:可自动加载本地存储设备的总容量/已用容量
 * 2:进度条显示已用容量
 * 3:支持所有操作系统
 * 4:增加U盘或者SD卡到达信号
 */

#include <QTableWidget>

class QProcess;

#ifdef quc
#if (QT_VERSION < QT_VERSION_CHECK(5,7,0))
#include <QtDesigner/QDesignerExportWidget>
#else
#include <QtUiPlugin/QDesignerExportWidget>
#endif

class QDESIGNER_WIDGET_EXPORT DeviceSizeTable : public QTableWidget
#else
class DeviceSizeTable : public QTableWidget
#endif

{
    Q_OBJECT
    Q_PROPERTY(QColor bgColor READ getBgColor WRITE setBgColor)
    Q_PROPERTY(QColor chunkColor1 READ getChunkColor1 WRITE setChunkColor1)
    Q_PROPERTY(QColor chunkColor2 READ getChunkColor2 WRITE setChunkColor2)
    Q_PROPERTY(QColor chunkColor3 READ getChunkColor3 WRITE setChunkColor3)
    Q_PROPERTY(QColor textColor1 READ getTextColor1 WRITE setTextColor1)
    Q_PROPERTY(QColor textColor2 READ getTextColor2 WRITE setTextColor2)
    Q_PROPERTY(QColor textColor3 READ getTextColor3 WRITE setTextColor3)

public:
    explicit DeviceSizeTable(QWidget *parent = 0);

private:
    QProcess *process;          //执行命令进程

    QColor bgColor;             //背景颜色
    QColor chunkColor1;         //进度颜色1
    QColor chunkColor2;         //进度颜色2
    QColor chunkColor3;         //进度颜色3
    QColor textColor1;          //文字颜色1
    QColor textColor2;          //文字颜色2
    QColor textColor3;          //文字颜色3

private slots:
    void readData();
    void checkSize(const QString &result, const QString &name);
    void insertSize(const QString &name, const QString &use, const QString &free, const QString &all, int percent);

public:
    QColor getBgColor()         const;
    QColor getChunkColor1()     const;
    QColor getChunkColor2()     const;
    QColor getChunkColor3()     const;
    QColor getTextColor1()      const;
    QColor getTextColor2()      const;
    QColor getTextColor3()      const;

    QSize sizeHint()            const;
    QSize minimumSizeHint()     const;

public Q_SLOTS:
    //载入容量
    void load();

    //设置背景颜色
    void setBgColor(const QColor &bgColor);

    //设置进度颜色
    void setChunkColor1(const QColor &chunkColor1);
    void setChunkColor2(const QColor &chunkColor2);
    void setChunkColor3(const QColor &chunkColor3);

    //设置文字颜色
    void setTextColor1(const QColor &textColor1);
    void setTextColor2(const QColor &textColor2);
    void setTextColor3(const QColor &textColor3);

Q_SIGNALS:
    void sdcardReceive(const QString &sdcardName);
    void udiskReceive(const QString &udiskName);
};

#endif // DEVICESIZETABLE_H

Fifth, the core code

#pragma execution_character_set("utf-8")

#include "devicesizetable.h"
#include "qprocess.h"
#include "qtablewidget.h"
#include "qheaderview.h"
#include "qfileinfo.h"
#include "qdir.h"
#include "qprogressbar.h"
#include "qtimer.h"
#include "qdebug.h"

#ifdef Q_OS_WIN
#include "windows.h"
#endif
#define GB (1024 * 1024 * 1024)
#define MB (1024 * 1024)
#define KB (1024)

DeviceSizeTable::DeviceSizeTable(QWidget *parent) : QTableWidget(parent)
{
    bgColor = QColor(255, 255, 255);

    chunkColor1 = QColor(100, 184, 255);
    chunkColor2 = QColor(24, 189, 155);
    chunkColor3 = QColor(255, 107, 107);

    textColor1 = QColor(10, 10, 10);
    textColor2 = QColor(255, 255, 255);
    textColor3 = QColor(255, 255, 255);

    process = new QProcess(this);
    connect(process, SIGNAL(readyRead()), this, SLOT(readData()));

    this->clear();

    //设置列数和列宽
    this->setColumnCount(5);
    this->setColumnWidth(0, 100);
    this->setColumnWidth(1, 120);
    this->setColumnWidth(2, 120);
    this->setColumnWidth(3, 120);
    this->setColumnWidth(4, 120);

    this->setStyleSheet("QTableWidget::item{padding:0px;}");

    QStringList headText;
    headText << "盘符" << "已用空间" << "可用空间" << "总大小" << "已用百分比" ;

    this->setHorizontalHeaderLabels(headText);
    this->setSelectionBehavior(QAbstractItemView::SelectRows);
    this->setEditTriggers(QAbstractItemView::NoEditTriggers);
    this->setSelectionMode(QAbstractItemView::SingleSelection);
    this->verticalHeader()->setVisible(true);
    this->horizontalHeader()->setStretchLastSection(true);

    QTimer::singleShot(0, this, SLOT(load()));
}

QColor DeviceSizeTable::getBgColor() const
{
    return this->bgColor;
}

QColor DeviceSizeTable::getChunkColor1() const
{
    return this->chunkColor1;
}

QColor DeviceSizeTable::getChunkColor2() const
{
    return this->chunkColor2;
}

QColor DeviceSizeTable::getChunkColor3() const
{
    return this->chunkColor3;
}

QColor DeviceSizeTable::getTextColor1() const
{
    return this->textColor1;
}

QColor DeviceSizeTable::getTextColor2() const
{
    return this->textColor2;
}

QColor DeviceSizeTable::getTextColor3() const
{
    return this->textColor3;
}

void DeviceSizeTable::load()
{
    //清空原有数据
    int row = this->rowCount();

    for (int i = 0; i < row; i++) {
        this->removeRow(0);
    }

#ifdef Q_OS_WIN
    QFileInfoList list = QDir::drives();

    foreach (QFileInfo dir, list) {
        QString dirName = dir.absolutePath();
        LPCWSTR lpcwstrDriver = (LPCWSTR)dirName.utf16();
        ULARGE_INTEGER liFreeBytesAvailable, liTotalBytes, liTotalFreeBytes;

        if (GetDiskFreeSpaceEx(lpcwstrDriver, &liFreeBytesAvailable, &liTotalBytes, &liTotalFreeBytes)) {
            QString use = QString::number((double)(liTotalBytes.QuadPart - liTotalFreeBytes.QuadPart) / GB, 'f', 1);
            use += "G";
            QString free = QString::number((double) liTotalFreeBytes.QuadPart / GB, 'f', 1);
            free += "G";
            QString all = QString::number((double) liTotalBytes.QuadPart / GB, 'f', 1);
            all += "G";
            int percent = 100 - ((double)liTotalFreeBytes.QuadPart / liTotalBytes.QuadPart) * 100;

            insertSize(dirName, use, free, all, percent);
        }
    }

#else
    process->start("df -h");
#endif
}

void DeviceSizeTable::setBgColor(const QColor &bgColor)
{
    if (this->bgColor != bgColor) {
        this->bgColor = bgColor;
        this->load();
    }
}

void DeviceSizeTable::setChunkColor1(const QColor &chunkColor1)
{
    if (this->chunkColor1 != chunkColor1) {
        this->chunkColor1 = chunkColor1;
        this->load();
    }
}

void DeviceSizeTable::setChunkColor2(const QColor &chunkColor2)
{
    if (this->chunkColor2 != chunkColor2) {
        this->chunkColor2 = chunkColor2;
        this->load();
    }
}

void DeviceSizeTable::setChunkColor3(const QColor &chunkColor3)
{
    if (this->chunkColor3 != chunkColor3) {
        this->chunkColor3 = chunkColor3;
        this->load();
    }
}

void DeviceSizeTable::setTextColor1(const QColor &textColor1)
{
    if (this->textColor1 != textColor1) {
        this->textColor1 = textColor1;
        this->load();
    }
}

void DeviceSizeTable::setTextColor2(const QColor &textColor2)
{
    if (this->textColor2 != textColor2) {
        this->textColor2 = textColor2;
        this->load();
    }
}

void DeviceSizeTable::setTextColor3(const QColor &textColor3)
{
    if (this->textColor3 != textColor3) {
        this->textColor3 = textColor3;
        this->load();
    }
}

void DeviceSizeTable::readData()
{
    while (!process->atEnd()) {
        QString result = QLatin1String(process->readLine());
#ifdef __arm__
        if (result.startsWith("/dev/root")) {
            checkSize(result, "本地存储");
        } else if (result.startsWith("/dev/mmcblk")) {
            checkSize(result, "本地存储");
        } else if (result.startsWith("/dev/mmcblk1p")) {
            checkSize(result, "SD卡");
            QStringList list = result.split(" ");
            emit sdcardReceive(list.at(0));
        } else if (result.startsWith("/dev/sd")) {
            checkSize(result, "U盘");
            QStringList list = result.split(" ");
            emit udiskReceive(list.at(0));
        }
#else
        if (result.startsWith("/dev/sd")) {
            checkSize(result, "");
            QStringList list = result.split(" ");
            emit udiskReceive(list.at(0));
        }
#endif
    }
}

void DeviceSizeTable::checkSize(const QString &result, const QString &name)
{
    QString dev, use, free, all;
    int percent = 0;
    QStringList list = result.split(" ");
    int index = 0;

    for (int i = 0; i < list.count(); i++) {
        QString s = list.at(i).trimmed();

        if (s == "") {
            continue;
        }

        index++;

        if (index == 1) {
            dev = s;
        } else if (index == 2) {
            all = s;
        } else if (index == 3) {
            use = s;
        } else if (index == 4) {
            free = s;
        } else if (index == 5) {
            percent = s.left(s.length() - 1).toInt();
            break;
        }
    }

    if (name.length() > 0) {
        dev = name;
    }

    insertSize(dev, use, free, all, percent);
}

void DeviceSizeTable::insertSize(const QString &name, const QString &use, const QString &free, const QString &all, int percent)
{
    int row = this->rowCount();
    this->insertRow(row);

    QTableWidgetItem *itemname = new QTableWidgetItem(name);
    QTableWidgetItem *itemuse = new QTableWidgetItem(use);
    itemuse->setTextAlignment(Qt::AlignCenter);
    QTableWidgetItem *itemfree = new QTableWidgetItem(free);
    itemfree->setTextAlignment(Qt::AlignCenter);
    QTableWidgetItem *itemall = new QTableWidgetItem(all);
    itemall->setTextAlignment(Qt::AlignCenter);

    this->setItem(row, 0, itemname);
    this->setItem(row, 1, itemuse);
    this->setItem(row, 2, itemfree);
    this->setItem(row, 3, itemall);

    QProgressBar *bar = new QProgressBar;
    bar->setRange(0, 100);
    bar->setValue(percent);

    QString qss = QString("QProgressBar{background:%1;border-width:0px;border-radius:0px;text-align:center;}"
                          "QProgressBar::chunk{border-radius:0px;}").arg(bgColor.name());

    if (percent < 50) {
        qss += QString("QProgressBar{color:%1;}QProgressBar::chunk{background:%2;}").arg(textColor1.name()).arg(chunkColor1.name());
    } else if (percent < 90) {
        qss += QString("QProgressBar{color:%1;}QProgressBar::chunk{background:%2;}").arg(textColor2.name()).arg(chunkColor2.name());
    } else {
        qss += QString("QProgressBar{color:%1;}QProgressBar::chunk{background:%2;}").arg(textColor3.name()).arg(chunkColor3.name());
    }

    bar->setStyleSheet(qss);
    this->setCellWidget(row, 4, bar);
}

QSize DeviceSizeTable::sizeHint() const
{
    return QSize(500, 300);
}

QSize DeviceSizeTable::minimumSizeHint() const
{
    return QSize(200, 150);
}

Sixth, the controls described

1. More than 149 exquisite control, covers a variety of dashboards, progress bar, the progress of the ball, compass, graphs, scales, thermometers, navigation bar, navigation bar, flatui, highlight the button, slide the selector, the lunar calendar and so on. Qwt far more than the number of controls integration.
2. Each class can be independently as a separate control, zero coupling each control file and a header file to achieve a code amount, independent of other files to facilitate individual control integrated into the project source code form, less. qwt interlocking control class, highly coupled, want to use one of the controls, must contain all the code.
3. Write all pure Qt, QWidget + QPainter to draw, to support any Qt version Qt4.6 Qt5.12, support for mingw, msvc, gcc compiler, etc., support any operating system such as windows + linux + mac + embedded linux, which does not garbled can be directly integrated into Qt Creator, a built-in controls and use the same, most of the effects can be as long as several properties are set, very convenient.
4. DEMO separate source containing the control corresponding to each control has a convenient reference. It also provides integrated use of all controls a DEMO.
5. Source code for each control has detailed Chinese annotation, are prepared in accordance with unified design specifications, easy to learn to write custom controls.
6. Each control default color and demo corresponding color is very beautiful.
7. More than 130 visible control, six invisible control.
8. Portion control provides a variety of styles style selection, multiple choice style indicator.
9. All controls changes adaptive stretched form.
10. Integrated design custom attribute that supports drag design, WYSIWYG support the import and export in xml format.
11. Activex control that comes with demo, all controls can be run directly in the browser ie.
12. Fontawesome integrated graphics font + Alibaba iconfont collection of hundreds of graphic fonts, font fun graphic brings.
13. All controls and finally generate a dll dynamic library files, can be integrated directly into qtcreator designed for use in drag.
14. Already qml version, the latter will consider a pyqt version, if the user is in great demand then.

Seven, SDK download

• SDK download link: https://pan.baidu.com/s/1A5Gd77kExm8Co5ckT51vvQ extraction code: 877p
• Download link is included in the various versions of the dynamic library files, header files of all the controls, the use of demo, custom controls + properties designer.
• Open plug-in custom dynamic library dll use (permanent free), and the back door without any restrictions, ease of use.
• 26 now available version dll, which includes qt5.12.3 msvc2017 32 + 64 mingw 32 + 64 in.
• From time to time to increase control and improve controls, regularly updated SDK, to welcome all suggestions, thank you!
• widget versions (QQ: 517216493) qml versions (QQ: 373955953) sambong camel (QQ: 278969898).
• Qt's advanced column know almost Taoge road https://zhuanlan.zhihu.com/TaoQt
• Welcome concern public micro-channel number] [efficient programmers, content C ++ / Python, learning, writing skills, popular technology, career development, a lot of dry goods, benefits a lot!