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Qt开源作品30-农历控件 [复制链接]

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离线liudianwu
 

图酷模式  只看楼主 倒序阅读 楼主  发表于: 2020-06-08
## 一、前言
农历控件在国产linux中必备的控件之一,毕竟要适应国人的习惯,你看win10系统的日历,现在点开来直接就有农历在上面,非常方便人性化,所以在很多用Qt做的项目中,也有农历控件的应用场景,而Qt自带的日历控件比较简单,仔细看过源码的人也只知道,其实就是一堆微调框,下拉框,表格组成的,于是打算借用此方法造一个农历控件,本控件的算法是倪大侠提供的,个人测试下来还是没有问题的,造这个农历控件最大的难点是如何根据日期计算农历时间,再加上一些农历的节气之类的,这个网上估计也有很多的算法参考。

**主要功能:**

1. 可设置边框颜色/周末颜色/角标颜色/农历节日颜色
2. 可设置当前月文字颜色/其他月文字颜色/选中日期文字颜色/悬停日期文字颜色
3. 可设置当前月农历文字颜色/其他月农历文字颜色/选中日期农历文字颜色/悬停日期农历文字颜色
4. 可设置当前月背景颜色/其他月背景颜色/选中日期背景颜色/悬停日期背景颜色
5. 可设置三种选中背景模式,矩形背景+圆形背景+图片背景
6. 可直接切换到上一年/下一年/上一月/下一月/转到今天
7. 可设置是否显示农历信息,不显示则当做正常的日历使用
8. 支持1900年-2099年范围
9. 很方便改成多选日期

## 二、代码思路
```c++
void LunarCalendarItem::paintEvent(QPaintEvent *)
{
    //绘制准备工作,启用反锯齿
    QPainter painter(this);
    painter.setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing);

    //绘制背景和边框
    drawBg(&painter);

    //优先绘制选中状态,其次绘制悬停状态
    if (select) {
        drawBgCurrent(&painter, selectBgColor);
    } else if (hover) {
        drawBgCurrent(&painter, hoverBgColor);
    }

    //绘制日期
    drawDay(&painter);

    //绘制农历信息
    drawLunar(&painter);
}

void LunarCalendarItem::drawBg(QPainter *painter)
{
    painter->save();

    //根据当前类型选择对应的颜色
    QColor bgColor = currentBgColor;
    if (dayType == DayType_MonthPre || dayType == DayType_MonthNext) {
        bgColor = otherBgColor;
    }

    painter->setPen(borderColor);
    painter->setBrush(bgColor);
    painter->drawRect(rect());

    painter->restore();
}

void LunarCalendarItem::drawBgCurrent(QPainter *painter, const QColor &color)
{
    int width = this->width();
    int height = this->height();
    int side = qMin(width, height);

    painter->save();

    painter->setPen(Qt::NoPen);
    painter->setBrush(color);

    //根据设定绘制背景样式
    if (selectType == SelectType_Rect) {
        painter->drawRect(rect());
    } else if (selectType == SelectType_Circle) {
        int radius = side / 2 - 3;
        painter->drawEllipse(QPointF(width / 2, height / 2), radius, radius);
    } else if (selectType == SelectType_Triangle) {
        int radius = side / 3;
        QPolygon pts;
        pts.setPoints(3, 1, 1, radius, 1, 1, radius);
        painter->drawRect(rect());
        painter->setBrush(superColor);
        painter->drawConvexPolygon(pts);
    } else if (selectType == SelectType_Image) {
        //等比例缩放居中绘制
        QImage img(bgImage);
        if (!img.isNull()) {
            img = img.scaled(this->size(), Qt::KeepAspectRatio, Qt::SmoothTransformation);
            int x = (width - img.width()) / 2;
            int y = (height - img.height()) / 2;
            painter->drawImage(x, y, img);
        }
    }

    painter->restore();
}

void LunarCalendarItem::drawDay(QPainter *painter)
{
    int width = this->width();
    int height = this->height();
    int side = qMin(width, height);

    painter->save();

    //根据当前类型选择对应的颜色
    QColor color = currentTextColor;
    if (dayType == DayType_MonthPre || dayType == DayType_MonthNext) {
        color = otherTextColor;
    } else if (dayType == DayType_WeekEnd) {
        color = weekColor;
    }

    if (select) {
        color = selectTextColor;
    } else if (hover) {
        color = hoverTextColor;
    }

    painter->setPen(color);

    if (showLunar) {
        QFont font;
        font.setPixelSize(side / 2.7);
        painter->setFont(font);

        QRect dayRect = QRect(0, 0, width, height / 1.7);
        painter->drawText(dayRect, Qt::AlignHCenter | Qt::AlignBottom, QString::number(date.day()));
    } else {
        QFont font;
        font.setPixelSize(side / 2);
        painter->setFont(font);

        QRect dayRect = QRect(0, 0, width, height);
        painter->drawText(dayRect, Qt::AlignCenter, QString::number(date.day()));
    }

    painter->restore();
}

void LunarCalendarItem::drawLunar(QPainter *painter)
{
    if (!showLunar) {
        return;
    }

    int width = this->width();
    int height = this->height();
    int side = qMin(width, height);

    painter->save();

    //判断当前农历文字是否节日,是节日且是当月则用农历节日颜色显示
    bool exist = (!listDayName.contains(lunar) && dayType != DayType_MonthPre && dayType != DayType_MonthNext);

    //根据当前类型选择对应的颜色
    QColor color = currentLunarColor;
    if (dayType == DayType_MonthPre || dayType == DayType_MonthNext) {
        color = otherLunarColor;
    }

    if (select) {
        color = selectTextColor;
    } else if (hover) {
        color = hoverTextColor;
    } else if (exist) {
        color = lunarColor;
    }

    painter->setPen(color);

    QFont font;
    font.setPixelSize(side / 5);
    painter->setFont(font);    

    QRect lunarRect(0, height / 2, width, height / 2);
    painter->drawText(lunarRect, Qt::AlignCenter, lunar);

    painter->restore();
}
```

## 三、效果图



## 四、开源主页
**以上作品完整源码下载都在开源主页,会持续不断更新作品数量和质量,欢迎各位关注。**

1. 国内站点:[https://gitee.com/feiyangqingyun/QWidgetDemo](https://gitee.com/feiyangqingyun/QWidgetDemo)
2. 国际站点:[https://github.com/feiyangqingyun/QWidgetDemo](https://github.com/feiyangqingyun/QWidgetDemo)
3. 个人主页:[https://blog.csdn.net/feiyangqingyun](https://blog.csdn.net/feiyangqingyun)
4. 知乎主页:[https://www.zhihu.com/people/feiyangqingyun/](https://www.zhihu.com/people/feiyangqingyun/)
欢迎关注微信公众号:Qt实战 (各种开源作品、经验整理、项目实战技巧,专注Qt/C++软件开发,视频监控、物联网、工业控制、嵌入式软件、国产化系统应用软件开发)QQ:517216493  WX:feiyangqingyun  QQ群:751439350
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只看该作者 1楼 发表于: 2020-06-08
    
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