QT自绘日历选择控件和时间滚动控件

通过QPainter自绘日历选择控件和时间滚动控件，
日历和时钟综合选择控件如下：

时间滚动控件如下：

日历选择控件如下：

控件显示通过设置窗口类型实现，如下
starttime->showWidget(CALENDARWIDGET);

核心代码：
1.时钟滚动自绘
void DrawClockTime::paintEvent(QPaintEvent *)
{
QPainter painter(this);
painter.setRenderHint(QPainter::Antialiasing, true);
int Height = height() - 1;
painter.drawRect(rect());
painter.fillRect(rect(), Qt::black);
m_currentY = height()/2;
m_Devideheight =height()/devide;

if ( m_deviation >= Height / devide && m_currentValue > m_minRange )
{
    m_mouseSrcPos += Height / devide;
    m_deviation -= Height / devide;
    m_currentValue -= interval;
}

if ( m_deviation <= -Height / devide && m_currentValue < m_maxRange )
{
    m_mouseSrcPos -= Height / devide;
    m_deviation += Height / devide;
    m_currentValue += interval;
}
emit currentValueChanged(m_currentValue);

paintNum(painter, m_currentValue, m_deviation);

int out = -1;
//两侧数字1
if (m_currentValue != m_minRange)
{
    paintNum(painter, m_currentValue - interval, m_deviation - Height / devide);
}
else
{
    paintNum(painter, m_maxRange, m_deviation - Height / devide);
    out = 0;
}

if (m_currentValue != m_maxRange)
{
    paintNum(painter, m_currentValue + interval, m_deviation + Height / devide);
}
else
{
    paintNum(painter, m_minRange, m_deviation + Height / devide);
    out = 0;
}
if(out>-1)
    out++;

for (int i=2; i <= devide/2; ++i)
{
    if (m_currentValue - interval * i >= m_minRange)
    {
        paintNum(painter, m_currentValue - interval * i, m_deviation - Height / devide * i);
    }
    else
    {
        if(out<0)
            out = 0;
        paintNum(painter, m_maxRange-out*interval, m_deviation - Height / devide * i);
        out++;
    }

    if (m_currentValue + interval * i <= m_maxRange)
    {
        paintNum(painter, m_currentValue + interval * i, m_deviation + Height / devide * i);
    }
    else
    {
        if(out<0)
            out = 0;
        paintNum(painter, m_minRange+interval * out, m_deviation + Height / devide * i);
        out++;
    }
}

}

void DrawClockTime::paintNum(QPainter &painter, int num, int deviation)
{
int Width = width() - 1;
int Height = height() - 1;
// int size = (Height - qAbs(deviation)) / m_numSize; //偏移量越大，数字越小
int transparency = 255 - 255 * qAbs(deviation) / Height;
int height = Height / devide;
int y = Height / 2 + deviation - height / 2;

QFont font= QFont("微软雅黑",8);
//font.setPixelSize(size);
if(num==m_currentValue)
    font.setBold(true);
else
    font.setBold(false);
painter.setFont(font);
painter.setPen(QColor(255,255,255,transparency));
if ( y >= 0 && y + height < Height)
{
    painter.drawLine(0,y, Width,y);
    painter.drawText(QRectF(0, y, Width, height),
                     Qt::AlignCenter,
                     QString::number(num));
}

}
2.日历自绘
void DrawDateTime::paintEvent(QPaintEvent * event)
{
QPainter painter(this);
painter.drawRect(rect());
painter.fillRect(rect(), Qt::black);
DrawWeek(painter);
DrawDay(painter);
}
void DrawDateTime::DrawWeek(QPainter & painter)
{
QString aText[7] = { “日”, “一”, “二”, “三”, “四”, “五”, “六” };

painter.save();
painter.setFont(weekFont);
QFontMetrics fm(weekFont);
int height = fm.height();
for (int i = 0; i < 7; ++i)
{
    int left = GetColumnLeft(i);
    int right = GetColumnRight(i);
    QRect rect(left, topBorder, right - left, height);
    //	painter.drawRect(rect);
    painter.setPen(QColor(255,255,255));
    //painter.setPen(QColor(246,200,133));
    painter.drawText(rect, Qt::AlignCenter, aText[i]);
}
painter.restore();

}

void DrawDateTime::DrawDay(QPainter & painter)
{
ResetDayFlag();

painter.save();

QFontMetrics fm(weekFont);
int weekHeight = fm.height();

for (int column = 0; column < m_column_count; ++column)
{
    int column_left = GetColumnLeft(column);
    int column_right = GetColumnRight(column);
    for (int row = 0; row < m_row_count; ++row)
    {
        int index = row * m_column_count + column;
        QRect & rcTmp = m_aRect[index];
        tDayFlag & flag = m_aDayFlag[index];

        rcTmp.setLeft(column_left);
        rcTmp.setRight(column_right);
        rcTmp.setTop(GetRowTop(row));
        rcTmp.setBottom(GetRowBottom(row));

        QPainterPath path;
        path.addRoundRect(rcTmp, 25);

        if (index == m_sOverIndex)//hover时背景色
        {
            painter.fillPath(path, QColor(54,84,95));
        }

        painter.save();
        if (-1 == flag.m_chFlagM || 1 == flag.m_chFlagM)
        {
            //painter.setPen(QColor(Qt::blue));
            painter.setPen(QColor(94,199,220));
            painter.setOpacity(0.2);//绘制半透明度字

        }
        else
        {
            if (MatchRealDate(flag))
            {
                //painter.setPen(QColor(Qt::red));
                painter.setPen(QColor(246,200,133));
            }
            else if (index == m_sOverIndex)
            {
                painter.setPen(QColor(Qt::white));
            }
            else
            {
                painter.setPen(QColor(Qt::white));
            }
          painter.setOpacity(0.8);//绘制半透明度字
        }
        //painter.setOpacity(0.8);//绘制半透明度字
        painter.drawText(rcTmp, Qt::AlignCenter, QString::number(flag.m_chFlagD));

        painter.restore();

        //	painter.drawPath(path);
    }
}

painter.restore();

}