#include?“qcw_thermometer.h“
#include?


QcwThermometer::QcwThermometer（QWidget?*parent）:?QWidget（parent）
{
????m_value?=?0;
????m_minValue?=?-30;
????m_maxValue?=?70;
????m_thresholdUp?=?-20;
????m_thresholdDown?=?50;
????m_thresholdFlag?=?false;
????m_units?=?QString::fromUtf8（“°C“?-1）;
????m_scaleMajor?=?10;
????m_scaleMinor?=?5;
????m_borderColor?=?Qt::blue;
????m_foreground?=?Qt::white;
????m_background?=?QColor（41?137?254）;
????m_liquidColor?=?Qt::red;

????resize（50?500）;
}

void?QcwThermometer::paintEvent（QPaintEvent?*）
{
????QPainter?painter（this）;
????painter.setRenderHint（QPainter::Antialiasing）;?	/*?使用反鋸齒（如果可用）?*/
????painter.translate（width（）?/?2?height（）?/?2）;	/*?坐標變換為窗體中心?*/
????int?side?=?qMin（width（）?height（））;
????painter.scale（side?/?200.0?side?/?200.0）;		/*?比例縮放?*/
????painter.setPen（Qt::NoPen）;
????int?nSteps?=?m_scaleMajor?*?m_scaleMinor;
????double?step?=?400.0?/?nSteps;
????QFont?font?=?this->font（）;

????/*?繪制邊框?*/
????painter.save（）;
????painter.setPen（QPen（m_borderColor?4））;
????painter.drawRect（-95?-245?190?490）;
????painter.restore（）;

????/*?繪制背景?*/
????painter.save（）;
????painter.setBrush（m_background）;
????painter.drawRect（-90?-240?180?480）;
????painter.restore（）;

????/*?繪制液體容器圓?*/
????painter.save（）;
????painter.setBrush（m_foreground）;
????painter.drawEllipse（-50?230?40?-40）;
????painter.restore（）;

????/*?繪制液體容器柱?*/
????painter.save（）;
????painter.setBrush（m_foreground）;
????painter.drawRect（-40?210?20?-440）;
????painter.restore（）;

????/*?繪制單位?*/
????painter.save（）;
????painter.setPen（m_foreground）;
????font.setPointSize（18）;
????painter.setFont（font）;
????painter.drawText（15?220?m_units）;
????painter.restore（）;

????/*?繪制刻度線?*/
????painter.save（）;
????QPen?pen（m_foreground）;
????for?（int?i?=?0?y?=?180.0;?i?<=?nSteps;?i++?y?-=?step）
????{
????????if?（i?%?m_scaleMinor?==?0）
????????{
????????????pen.setWidth（2）;
????????????painter.setPen（pen）;
????????????painter.drawLine（-20?y?0?y）;
????????}
????????else
????????{
????????????pen.setWidth（1）;
????????????painter.setPen（pen）;
????????????painter.drawLine（-20?y?-10?y）;
????????}
????}
????painter.restore（）;

????/*?繪制刻度值?*/
????painter.save（）;
????painter.setPen（m_foreground）;
????double?tmpVal;
????step?=?400.0?/?m_scaleMajor;
????for?（int?i?=?0?y?=?185.0;?i?<=?m_scaleMajor;?i++?y?-=?step）
????{
????????tmpVal?=?1.0?*?i?*（（m_maxValue?-?m_minValue）?/?m_scaleMajor）?+?m_minValue;
????????painter.drawText（5?y?QString（?“%1“?）.arg（tmpVal））;
????}
????painter.restore（）;

????/*?繪制液體圓?*/
????painter.save（）;
????painter.setBrush（m_liquidColor）;
????painter.drawEllipse（-45?225?30?-30）;
????painter.restore（）;

????/*?繪制液體柱（指示）?*/
????painter.save（）;
????painter.setBrush（m_liquidColor）;
????double?val?=??400.0?/（m_maxValue?-?m_minValue）*（m_value?-?m_minValue）;
????painter.drawRect（-35?205?10?-val?-?25）;
????painter

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件????????1292??2018-11-21?14:52??bar.pro
?????文件????????5060??2018-11-21?14:54??cthermometer.cpp
?????文件????????2619??2018-11-21?14:51??cthermometer.h
?????文件?????????183??2018-11-21?13:59??main.cpp
?????文件?????????340??2018-11-21?16:31??mainwindow.cpp
?????文件?????????392??2018-11-21?16:31??mainwindow.h
?????文件????????3854??2018-11-21?16:32??mainwindow.ui
?????文件????????2145??2018-11-21?17:50??qcw_thermometer.cpp
?????文件?????????549??2018-11-21?16:53??qcw_thermometer.h
?????文件????????9055??2018-11-21?17:22??程序截圖.png
?????文件????????5722??2018-11-21?17:24??程序截圖2.png
?????文件????????5721??2018-11-21?17:24??程序截圖3.png