Qt日历控件示例-QCalendarWidget

基本说明

QCalendarWidget介绍：
QCalendarWidget 是 Qt 框架中提供的一个日期选择控件,用户可以通过该控件快速选择需要的日期,并且支持显示当前月份的日历。
这里，我们继承了QCalendarWidget，做了一些简单封装和样式调整

1.使用的IDE： QtCreator；
2.qt 版本：Desktop Qt 5.15.2 MSVC2015 64bit
3.效果图：

代码

TCalendarWidget.h

#ifndef TCALENDARWIDGET_H
#define TCALENDARWIDGET_H

#include <QCalendarWidget>

class QPushButton;
class QLabel;

class TCalendarWidget : public QCalendarWidget
{
    Q_OBJECT

public:
    TCalendarWidget(QWidget *parent = 0);
    ~TCalendarWidget();

    void SetHighlightDate(QList<QDate> lstDate);

private:
    void InitControl();
    void InitTopWidget();
    void SetDataLabelTimeText(int year, int month);

signals:
    void SignalSetCalendarTime(const QDate& data);

private slots:
    void SlotBtnClicked();

protected:
    void paintCell(QPainter *painter, const QRect &rect, const QDate &date) const;

private:
    QPushButton     *m_pBtnLeftYear;
    QPushButton     *m_pBtnLeftMonth;

    QPushButton     *m_pBtnRightYear;
    QPushButton     *m_pBtnRightMonth;

    QLabel          *m_pLblDate;

    QList<QDate>     m_lstHighlightDate;
};


#endif //_T_PROPERTY_H_

TCalendarWidget.cpp

#pragma execution_character_set("utf-8")
#include "TCalendarWidget.h"

#include <QLocale> 
#include <QPainter>
#include <QTextCharFormat>
#include <QProxyStyle>
#include <QTableView>
#include <QLayout>
#include <QPushButton>
#include <QLabel>



class QCustomStyle : public QProxyStyle
{
public:
    QCustomStyle(QWidget *parent) {
        setParent(parent);
    };

private:
    void drawPrimitive(PrimitiveElement element, const QStyleOption *option,
        QPainter *painter, const QWidget *widget) const
    {
        if (element == PE_FrameFocusRect)
        {
            return;
        }
        QProxyStyle::drawPrimitive(element, option, painter, widget);
    }
};



TCalendarWidget::TCalendarWidget(QWidget *parent)
    : QCalendarWidget(parent)
{
    InitControl();
}

TCalendarWidget::~TCalendarWidget()
{

}

void TCalendarWidget::SetHighlightDate(QList<QDate> lstDate)
{
    m_lstHighlightDate = lstDate;
    updateCells();
}

void TCalendarWidget::InitControl()
{
    layout()->setSizeConstraint(QLayout::SetFixedSize);
    setLocale(QLocale(QLocale::Chinese));
    setNavigationBarVisible(false);
    setVerticalHeaderFormat(QCalendarWidget::NoVerticalHeader);
    setHorizontalHeaderFormat(QCalendarWidget::SingleLetterDayNames);
    setStyle(new QCustomStyle(this));

    QTextCharFormat format;
    format.setForeground(QColor("#FFFFFF"));
    format.setBackground(QColor(27, 33, 43));

    setHeaderTextFormat(format);
    setWeekdayTextFormat(Qt::Saturday, format);
    setWeekdayTextFormat(Qt::Sunday, format);
    setWeekdayTextFormat(Qt::Monday, format);
    setWeekdayTextFormat(Qt::Tuesday, format);
    setWeekdayTextFormat(Qt::Wednesday, format);
    setWeekdayTextFormat(Qt::Thursday, format);
    setWeekdayTextFormat(Qt::Friday, format);

    InitTopWidget();

    connect(this, &QCalendarWidget::currentPageChanged, [this](int year, int month) {
        SetDataLabelTimeText(year, month);
    });
}

void TCalendarWidget::paintCell(QPainter *painter, const QRect &rect, const QDate &date) const
{
    bool bHightlight = false;
    foreach (QDate date1,m_lstHighlightDate)
    {
        if (date1 == date)
        {
            bHightlight = true;
        }
    }


    if (date == selectedDate())
    {
        painter->save();
        painter->setRenderHint(QPainter::Antialiasing);
        painter->setPen(QColor("#1B212B"));
        painter->setBrush(QColor("#1B212B"));
        painter->drawRect(rect);

        painter->setPen(QColor("#2678D5"));
        painter->setBrush(QColor("#264974"));
        painter->drawRoundedRect(rect.x() + 6, rect.y() + 2, 24, 24, 2, 2);

        painter->setPen(bHightlight?QColor("#2678D5"): QColor("#FFFFFF"));
        painter->drawText(rect, Qt::AlignCenter, QString::number(date.day()));
        painter->restore();
    }
    else if (date == QDate::currentDate())
    {
        painter->save();
        painter->setRenderHint(QPainter::Antialiasing);
        painter->setPen(QColor("#1B212B"));
        painter->setBrush(QColor("#1B212B"));
        painter->drawRect(rect);

        painter->setPen(QColor("#2678D5"));
        painter->setBrush(Qt::NoBrush);
        painter->drawRoundedRect(rect.x()+6, rect.y()+2, rect.width()-12, rect.height()-4, 2, 2);


        painter->setPen(bHightlight ? QColor("#2678D5") : QColor("#FFFFFF"));
        painter->drawText(rect, Qt::AlignCenter, QString::number(date.day()));
        painter->restore();
    }
    else if (date < minimumDate() || date > maximumDate())
    {
        painter->save();
        painter->setRenderHint(QPainter::Antialiasing);
        painter->setPen(Qt::NoPen);
        painter->setBrush(QColor(249, 249, 249));

        painter->drawRect(rect.x(), rect.y() + 3, rect.width(), rect.height() - 6);
        painter->setPen(QColor("#3D4E5E"));
        painter->drawText(rect, Qt::AlignCenter, QString::number(date.day()));
        painter->restore();
    }
    else
    {
        painter->save();
        painter->setRenderHint(QPainter::Antialiasing);
        painter->setPen(QColor("#1B212B"));
        painter->setBrush(QColor("#1B212B"));
        painter->drawRect(rect);

        painter->setPen(bHightlight ? QColor("#2678D5") : QColor("#FFFFFF"));
        painter->drawText(rect, Qt::AlignCenter, QString::number(date.day()));
        painter->restore();
    }
}

void TCalendarWidget::InitTopWidget()
{
    QWidget* pTopWidget = new QWidget(this);
    pTopWidget->setObjectName("CalendarTopWidget");
    pTopWidget->setFixedHeight(36);
    pTopWidget->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);

    QHBoxLayout* pHBoxLayout = new QHBoxLayout;
    pHBoxLayout->setContentsMargins(20, 0, 20, 0);
    pHBoxLayout->setSpacing(10);

    m_pBtnLeftYear = new QPushButton(this);
    m_pBtnRightYear = new QPushButton(this);
    m_pBtnLeftMonth = new QPushButton(this);
    m_pBtnRightMonth = new QPushButton(this);
    m_pLblDate = new QLabel(this);

    m_pBtnLeftYear->setObjectName("CalendarLeftYearBtn");
    m_pBtnRightYear->setObjectName("CalendarRightYearBtn");
    m_pBtnLeftMonth->setObjectName("CalendarLeftMonthBtn");
    m_pBtnRightMonth->setObjectName("CalendarRightMonthBtn");
    m_pLblDate->setObjectName("CommonTextWhite14");

    pHBoxLayout->addWidget(m_pBtnLeftYear);
    pHBoxLayout->addWidget(m_pBtnLeftMonth);
    pHBoxLayout->addStretch();
    pHBoxLayout->addWidget(m_pLblDate);
    pHBoxLayout->addStretch();
    pHBoxLayout->addWidget(m_pBtnRightMonth);
    pHBoxLayout->addWidget(m_pBtnRightYear);
    pTopWidget->setLayout(pHBoxLayout);

    QVBoxLayout *vBodyLayout = qobject_cast<QVBoxLayout *>(layout());
    vBodyLayout->insertWidget(0, pTopWidget);

    connect(m_pBtnLeftYear, SIGNAL(clicked()), this, SLOT(SlotBtnClicked()));
    connect(m_pBtnLeftMonth, SIGNAL(clicked()), this, SLOT(SlotBtnClicked()));
    connect(m_pBtnRightYear, SIGNAL(clicked()), this, SLOT(SlotBtnClicked()));
    connect(m_pBtnRightMonth, SIGNAL(clicked()), this, SLOT(SlotBtnClicked()));

    SetDataLabelTimeText(selectedDate().year(), selectedDate().month());
}

void TCalendarWidget::SetDataLabelTimeText(int year, int month)
{
    m_pLblDate->setText(QString("%1年%2月").arg(year).arg(month));
}

void TCalendarWidget::SlotBtnClicked()
{
    QPushButton *senderBtn = qobject_cast<QPushButton *>(sender());
    if (senderBtn == m_pBtnLeftYear)
    {
        showPreviousYear();
    }
    else if (senderBtn == m_pBtnLeftMonth)
    {
        showPreviousMonth();
    }
    else if (senderBtn == m_pBtnRightYear)
    {
        showNextYear();
    }
    else if (senderBtn == m_pBtnRightMonth)
    {
        showNextMonth();
    }
}

样式：

QString Dialog::GetQss()
{

    QString str = " QPushButton{font-family: \"Microsoft YaHei\";border:none;background:transparent;}\
    \
    QWidget#CalendarTopWidget \
    { \
        background: #1B212B; \
        border:none; \
        border-bottom: 1px solid #45596B; \
    } \
    \
    QPushButton#CalendarLeftYearBtn \
    { \
        max-height:16px; \
        min-height:16px; \
        max-width:16px; \
        min-width:16px; \
        image: url(STYLESHEET_PIC_PATH/common/year_last_nor.png); \
    } \
    \
    QPushButton#CalendarLeftYearBtn:hover \
    { \
        image: url(STYLESHEET_PIC_PATH/common/year_last_down.png); \
    } \
    \
    \
    QPushButton#CalendarRightYearBtn \
    { \
        max-height:16px; \
        min-height:16px; \
        max-width:16px; \
        min-width:16px; \
        image: url(STYLESHEET_PIC_PATH/common/year_next_nor.png); \
    } \
    \
    QPushButton#CalendarRightYearBtn:hover \
    { \
        image: url(STYLESHEET_PIC_PATH/common/year_next_down.png); \
    } \
    \
    QPushButton#CalendarLeftMonthBtn \
    { \
        max-height:16px; \
        min-height:16px; \
        max-width:16px; \
        min-width:16px; \
        image: url(STYLESHEET_PIC_PATH/common/month_last_nor.png); \
    } \
    \
    QPushButton#CalendarLeftMonthBtn:hover \
    { \
        image: url(STYLESHEET_PIC_PATH/common/month_last_down.png); \
    } \
    \
    QPushButton#CalendarRightMonthBtn \
    { \
        max-height:16px; \
        min-height:16px; \
        max-width:16px; \
        min-width:16px; \
        image: url(STYLESHEET_PIC_PATH/common/month_next_nor.png); \
    } \
    \
    QPushButton#CalendarRightMonthBtn:hover \
    { \
        image: url(STYLESHEET_PIC_PATH/common/month_next_down.png); \
    } \
    QLabel#CommonTextWhite14 \
    { \
        color: #ffffff; \
        font-size: 14px; \
    } \
    ";

    str.replace("STYLESHEET_PIC_PATH/common/", "://res/");
    return str;
}

图片资源

图片下载

调用代码

Dialog::Dialog(QWidget *parent)
    : QDialog(parent)
    , ui(new Ui::Dialog)
{
    ui->setupUi(this);
    setWindowTitle(tr("Calendar Widget"));
    setWindowFlags(Qt::Dialog | Qt::WindowCloseButtonHint);
    // 样式 1
    setStyleSheet(GetQss());
    
    m_pCalender = new TCalendarWidget(this);
    QHBoxLayout* pMainLayout = new QHBoxLayout(this);
    pMainLayout->setMargin(0);
    pMainLayout->addWidget(m_pCalender);
}