Qt自定义控件大全

Qt编写自定义控件34-磁盘容量统计

2019-07-21  本文已影响7人  feiyangqingyun

一、前言

磁盘容量统计控件,说白了,就是用来统计本地盘符占用的容量,包括但不限于已用空间、剩余空间、总大小、已用百分比等,其中对应的百分比采用进度条显示,该进度条的前景色和背景色及文字颜色可以设置,在整体换肤的时候就需要用到。
本控件的基本上没有难点可言,就是兼容WIN和LINUX操作系统,在WIN上采用winapi去读取,linux采用QProcess去执行对应的命令(df -h)获取结果,然后定时器执行,关联信号槽获取返回的额数据解析即可,控件的应用场景主要是在一些嵌入式设备上面,方便用户查看当前还剩余多少空间。

二、实现的功能

三、效果图

在这里插入图片描述

四、头文件代码

#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


五、核心代码

#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);
}


六、控件介绍

  1. 超过149个精美控件,涵盖了各种仪表盘、进度条、进度球、指南针、曲线图、标尺、温度计、导航条、导航栏,flatui、高亮按钮、滑动选择器、农历等。远超qwt集成的控件数量。
  2. 每个类都可以独立成一个单独的控件,零耦合,每个控件一个头文件和一个实现文件,不依赖其他文件,方便单个控件以源码形式集成到项目中,较少代码量。qwt的控件类环环相扣,高度耦合,想要使用其中一个控件,必须包含所有的代码。
  3. 全部纯Qt编写,QWidget+QPainter绘制,支持Qt4.6到Qt5.12的任何Qt版本,支持mingw、msvc、gcc等编译器,支持任意操作系统比如windows+linux+mac+嵌入式linux等,不乱码,可直接集成到Qt Creator中,和自带的控件一样使用,大部分效果只要设置几个属性即可,极为方便。
  4. 每个控件都有一个对应的单独的包含该控件源码的DEMO,方便参考使用。同时还提供一个所有控件使用的集成的DEMO。
  5. 每个控件的源代码都有详细中文注释,都按照统一设计规范编写,方便学习自定义控件的编写。
  6. 每个控件默认配色和demo对应的配色都非常精美。
  7. 超过130个可见控件,6个不可见控件。
  8. 部分控件提供多种样式风格选择,多种指示器样式选择。
  9. 所有控件自适应窗体拉伸变化。
  10. 集成自定义控件属性设计器,支持拖曳设计,所见即所得,支持导入导出xml格式。
  11. 自带activex控件demo,所有控件可以直接运行在ie浏览器中。
  12. 集成fontawesome图形字体+阿里巴巴iconfont收藏的几百个图形字体,享受图形字体带来的乐趣。
  13. 所有控件最后生成一个dll动态库文件,可以直接集成到qtcreator中拖曳设计使用。
  14. 目前已经有qml版本,后期会考虑出pyqt版本,如果用户需求量很大的话。

七、SDK下载

上一篇下一篇

猜你喜欢

热点阅读