hide number when it close to black block

Cockpit/leftladder.cpp

@@ -0,0 +1,244 @@
+#include "leftladder.h"
+
+LeftLadder::LeftLadder(QWidget *parent): QWidget(parent)
+{
+
+     m_CentreLineColor = Qt::white;
+
+
+}
+
+
+
+void LeftLadder::setAirSpeed(float speed)
+{
+    airspeed = speed;
+}
+
+
+
+
+
+
+
+
+
+void LeftLadder::mouseReleaseEvent(QMouseEvent *e)
+{
+    qDebug() << "release" << e;
+    update();
+}
+
+void LeftLadder::mousePressEvent(QMouseEvent *e)
+{
+    qDebug() << "press" << e;
+
+    update();
+}
+
+void LeftLadder::mouseDoubleClickEvent(QMouseEvent *e)
+{
+    qDebug() << "double clicked" << e;
+    update();
+}
+
+void LeftLadder::wheelEvent(QWheelEvent *e)
+{
+    qDebug() << "wheel event" << e;
+
+
+    update();
+}
+
+
+
+void LeftLadder::paintEvent(QPaintEvent *)
+{
+    QPainter painter(this);
+    painter.setRenderHint(QPainter::Antialiasing); 	/* 使用反锯齿(如果可用) */
+
+    //painter.translate(width() / 2, 2 * height() / 5);	/* 坐标变换为窗体中心 */
+    int side = qMin(width(), height());                 /* 这一句决定了这个模块只能是方形 */
+    painter.scale(side / 2000.0, side / 2000.0);	/* 比例缩放 */
+    painter.setPen(Qt::NoPen);
+
+
+    drawLeftScale(&painter);
+
+
+
+}
+
+
+//画左刻度尺 用单独的控件最容易解决
+void LeftLadder::drawLeftScale(QPainter *painter)
+{
+    painter->save();
+
+    //平移坐标
+    painter->translate(-1100,0);
+
+    QPen ePen;
+    QFont font;
+    //画一个半透明的小方块
+    painter->save();
+    painter->setOpacity(0.3f);
+    ePen.setColor(QColor("#7A7A7A"));
+    painter->setBrush(QColor("#7A7A7A"));
+    painter->drawRect(0,-600,300,1200);
+    painter->restore();
+
+    //画最底下的黑色单位显示框
+    painter->save();
+    ePen.setColor(QColor("#FFFFFF"));
+    ePen.setWidth(10);
+
+
+    font.setPixelSize(60);
+
+    painter->setPen(ePen);
+    painter->setFont(font);
+    painter->setBrush(QColor("#000000"));
+    painter->drawRect(0,600,300,100);
+
+    painter->drawText(QRect(20,600,280,100),Qt::AlignLeft|Qt::AlignVCenter,"TAS " + QString::number(airspeed));
+
+    painter->restore();
+
+
+    //画旁边的速度刻度，并显示
+    painter->save();
+
+    painter->translate(0,1200.0f/40.0f * airspeed);
+
+    float h = 1200.0f/40.0f;//单位高度
+
+
+    for(int i = -19 - airspeed;i<=(19 - airspeed);i+=1)
+    {
+
+        QString strText = QString::number(-i);  //设置当前字体
+        painter->save();
+
+        QPen ePen;
+        QFont font;
+        ePen.setColor(m_CentreLineColor);
+        ePen.setWidth(10);
+        font.setPointSize(60);
+
+        painter->setPen(ePen);
+        painter->setFont(font);
+
+        if((i%10) == 0)
+        {
+           //if((i * h > 100)||(i * h < -100))
+           //{
+               painter->drawLine( 220,i * h,290,i * h);
+               painter->drawText(QRect(20,i * h - 30,190,60),Qt::AlignVCenter|Qt::AlignRight, strText);
+           //}
+        }
+        else if((i%5) == 0)
+        {
+           painter->drawLine(240,i * h,290,i * h);
+        }
+
+
+
+
+        painter->restore();
+    }
+
+
+
+
+
+    painter->restore();
+
+
+    //画旁边的速度彩条
+    painter->save();
+
+    painter->setBrush(QColor("#FFC125"));
+    painter->drawRect(275,-600,25,1200);
+    painter->restore();
+
+    //画 中间黑色的显示块
+    painter->save();
+
+    static const QPointF points1[11] = {
+          QPointF(  0,-50),
+          QPointF(200,-50),
+          QPointF(200,-100),
+          QPointF(275,-100),
+
+          QPointF(275,-25),
+          QPointF(290, 0),
+          QPointF(275, 25),
+
+          QPointF(275, 100),
+          QPointF(200, 100),
+          QPointF(200, 50),
+          QPointF(  0, 50)
+      };
+
+      painter->setBrush(QColor("#000000"));
+      painter->drawPolygon(points1, 11);
+
+
+
+      ePen.setColor(m_CentreLineColor);
+      ePen.setWidth(15);
+      font.setPointSize(90);
+      painter->setPen(ePen);
+      painter->setFont(font);
+
+
+
+
+
+      QString DacadeText = QString::number(int(airspeed/10));  //设置十位以上
+      QString UnitText = QString::number(qAbs(int(airspeed)%10));  //设置个位
+      painter->drawText(QRect(0,-50,200,100),Qt::AlignVCenter|Qt::AlignRight, DacadeText);
+      //painter->drawText(QRect(200,-50,100,100),Qt::AlignVCenter|Qt::AlignLeft, UnitText);
+
+      float Unit = airspeed - int(airspeed)/10 * 10;
+      float Decimal = (airspeed - int(airspeed));
+
+
+      qDebug() << Unit;
+      for(int i = -2 - Unit;i<(2 - Unit);i+=1)
+      {
+
+          QString strText = QString::number(((-i < 0)?(-i+10):((-i>=10)?(-i-10):(-i))));  //设置当前字体
+          painter->save();
+
+          QPen ePen;
+          QFont font;
+          ePen.setColor(m_CentreLineColor);
+          ePen.setWidth(15);
+          font.setPointSize(90);
+
+          painter->setPen(ePen);
+          painter->setFont(font);
+          painter->drawText(QRect(200,(i + Unit) * 100 - 50,100,90),Qt::AlignVCenter|Qt::AlignLeft, strText);
+
+
+
+
+
+
+          painter->restore();
+      }
+
+
+      painter->restore();
+
+
+
+
+    painter->restore();
+}
+
+
+
+