qwt

矫情吗；* 2022-06-09 14:52 199阅读 0赞

分类： LINUX

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 <td style="word-wrap:break-word; margin:0px; padding:0px; border:none">鼠标滚轮放大缩小： 
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 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> QwtPlotMagnifier&nbsp;*PM&nbsp;=&nbsp;new QwtPlotMagnifier(&nbsp;ui-&gt;qwtPlot-&gt;canvas()&nbsp;);</li> 
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 </div> 鼠标左键拖动波形： 
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 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> QwtPlotPanner&nbsp;*PQ=&nbsp;new QwtPlotPanner(&nbsp;ui-&gt;qwtPlot-&gt;canvas()&nbsp;);</li> 
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 </div> 鼠标左键选择区域放大：（右键还原） 
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 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> QwtPlotZoomer* zoomer = new QwtPlotZoomer( ui-&gt;qwtPlot-&gt;canvas() );</li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> zoomer-&gt;setRubberBandPen( QColor( Qt::black ) );</li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> zoomer-&gt;setTrackerPen( QColor( Qt::black ) );</li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> zoomer-&gt;setMousePattern(QwtEventPattern::MouseSelect2,Qt::RightButton, Qt::ControlModifier );</li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> zoomer-&gt;setMousePattern(QwtEventPattern::MouseSelect3,Qt::RightButton );</li> 
 </ol> 
 </div> 设置X轴下面标识： 
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 <div style="word-wrap:break-word; border:1px solid rgb(221,221,221); width:704.292px; overflow:auto; margin:0px 0px 1.1em; padding:0px; word-break:break-all; letter-spacing:0.1px; font-family:Consolas,monospace"> 
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 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> ui-&gt;qwtPlot-&gt;setAxisTitle(QwtPlot::xBottom,&nbsp;"x --&gt;"&nbsp;);</li> 
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 </div> 设置X轴取值范围： 
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 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> ui-&gt;qwtPlot-&gt;setAxisScale(QwtPlot::xBottom,&nbsp;0.0,&nbsp;30.0);</li> 
 </ol> 
 </div> 设置Y轴左边标识（竖着显示）： 
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 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> ui-&gt;qwtPlot-&gt;setAxisTitle(QwtPlot::yLeft,&nbsp;"y --&gt;");</li> 
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 </div> 设置Y轴取值范围： 
 <div style="word-wrap:break-word; border:1px solid rgb(221,221,221); width:704.292px; overflow:auto; margin:0px 0px 1.1em; padding:0px; word-break:break-all; letter-spacing:0.1px; font-family:Consolas,monospace"> 
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 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> ui-&gt;qwtPlot-&gt;setAxisScale(QwtPlot::yLeft,&nbsp;-1.0,&nbsp;1.0);</li> 
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 </div> 创建一个sin()曲线： 
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 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> QwtPlotCurve&nbsp;*cSin&nbsp;=&nbsp;new QwtPlotCurve("y = sin(x)");</li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> cSin-&gt;setRenderHint(QwtPlotItem::RenderAntialiased);</li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> cSin-&gt;setLegendAttribute(QwtPlotCurve::LegendShowLine,&nbsp;true);</li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> cSin-&gt;setPen(QPen(Qt::blue));</li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;cSin-&gt;attach(ui-&gt;qwtPlot);</li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> cSin-&gt;setData(new FunctionData(::sin));</li> 
 </ol> 
 </div> 其中FunctionData为： 
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 <td style="word-wrap:break-word; margin:0px; padding:0px; border:none">class&nbsp;FunctionData:&nbsp;public&nbsp;QwtSyntheticPointData&nbsp;{ &nbsp;public:&nbsp;FunctionData(double(*y)(double)):&nbsp;QwtSyntheticPointData(100),&nbsp;d_y(y)&nbsp;{ &nbsp;}&nbsp;virtual&nbsp;double&nbsp;y(double&nbsp;x)&nbsp;const&nbsp;{ return&nbsp;d_y(x);&nbsp;}&nbsp;private:&nbsp;double(*d_y)(double);&nbsp;}; 
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 <ol style="word-wrap:break-word; margin:0px 1px 0px 0px; padding:5px 0px; list-style:none; color:rgb(92,92,92); line-height:1.3"> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> class&nbsp;FunctionData:&nbsp;public&nbsp;QwtSyntheticPointData </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> { </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> public: </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;FunctionData(double(*y)(double)): </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;QwtSyntheticPointData(100), </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;d_y(y) </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;{ </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;} </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;virtual double y(double x)&nbsp;const </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;{ </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return d_y(x); </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;} </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> private: </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;double(*d_y)(double); </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> };</li> 
 </ol> 
 </div> </td> 
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 </tbody> 
 </table> 创建波形标识：（Y=0）&nbsp;QwtPlotMarker&nbsp;*mY&nbsp;=&nbsp;new&nbsp;QwtPlotMarker();&nbsp;mY-&gt;setLabel(QString::fromLatin1("y&nbsp;=&nbsp;0"));&nbsp;mY-&gt;setLabelAlignment(Qt::AlignRight|Qt::AlignTop);&nbsp;mY-&gt;setLineStyle(QwtPlotMarker::HLine);mY-&gt;setYValue(0.0);&nbsp;mY-&gt;attach(ui-&gt;qwtPlot); 
 <div style="word-wrap:break-word; border:1px solid rgb(221,221,221); width:704.292px; overflow:auto; margin:0px 0px 1.1em; padding:0px; word-break:break-all; letter-spacing:0.1px; font-family:Consolas,monospace"> 
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 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> QwtPlotMarker&nbsp;*mY&nbsp;=&nbsp;new QwtPlotMarker(); </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;mY-&gt;setLabel(QString::fromLatin1("y = 0")); </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;mY-&gt;setLabelAlignment(Qt::AlignRight|Qt::AlignTop); </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;mY-&gt;setLineStyle(QwtPlotMarker::HLine); </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;mY-&gt;setYValue(0.0); </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;mY-&gt;attach(ui-&gt;qwtPlot);</li> 
 </ol> 
 </div> 创建波形标识：（X=PI/2）&nbsp;QwtPlotMarker&nbsp;*mX&nbsp;=&nbsp;new&nbsp;QwtPlotMarker();&nbsp;mX-&gt;setLabel(QString::fromLatin1("x&nbsp;=&nbsp;PI/2"));&nbsp;mX-&gt;setLabelAlignment(Qt::AlignLeft&nbsp;|Qt::AlignBottom);&nbsp;mX-&gt;setLabelOrientation(Qt::Vertical);&nbsp;mX-&gt;setLineStyle(QwtPlotMarker::VLine);&nbsp;mX-&gt;setLinePen(QPen(Qt::black,&nbsp;1,Qt::DashDotDotLine));&nbsp;mX-&gt;setXValue(M_PI/2);&nbsp;mX-&gt;attach(ui-&gt;qwtPlot); 
 <div style="word-wrap:break-word; border:1px solid rgb(221,221,221); width:704.292px; overflow:auto; margin:0px 0px 1.1em; padding:0px; word-break:break-all; letter-spacing:0.1px; font-family:Consolas,monospace"> 
 <ol style="word-wrap:break-word; margin:0px 1px 0px 0px; padding:5px 0px; list-style:none; color:rgb(92,92,92); line-height:1.3"> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> QwtPlotMarker&nbsp;*mX&nbsp;=&nbsp;new QwtPlotMarker(); </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;mX-&gt;setLabel(QString::fromLatin1("x = PI/2")); </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;mX-&gt;setLabelAlignment(Qt::AlignLeft&nbsp;|&nbsp;Qt::AlignBottom); </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;mX-&gt;setLabelOrientation(Qt::Vertical); </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;mX-&gt;setLineStyle(QwtPlotMarker::VLine); </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;mX-&gt;setLinePen(QPen(Qt::black,&nbsp;1,&nbsp;Qt::DashDotDotLine)); </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;mX-&gt;setXValue(M_PI/2); </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;mX-&gt;attach(ui-&gt;qwtPlot);</li> 
 </ol> 
 </div> 设置qwtPlot的画布:（圆角矩形）&nbsp;ui-&gt;qwtPlot-&gt;canvas()-&gt;setLineWidth(&nbsp;1&nbsp;);&nbsp;ui-&gt;qwtPlot-&gt;canvas()-&gt;setFrameStyle(&nbsp;QFrame::Box&nbsp;|&nbsp;QFrame::Plain&nbsp;);&nbsp;ui-&gt;qwtPlot-&gt;canvas()-&gt;setBorderRadius(&nbsp;15&nbsp;); 
 <div style="word-wrap:break-word; border:1px solid rgb(221,221,221); width:704.292px; overflow:auto; margin:0px 0px 1.1em; padding:0px; word-break:break-all; letter-spacing:0.1px; font-family:Consolas,monospace"> 
 <ol style="word-wrap:break-word; margin:0px 1px 0px 0px; padding:5px 0px; list-style:none; color:rgb(92,92,92); line-height:1.3"> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> ui-&gt;qwtPlot-&gt;canvas()-&gt;setLineWidth(&nbsp;1&nbsp;); </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;ui-&gt;qwtPlot-&gt;canvas()-&gt;setFrameStyle(&nbsp;QFrame::Box&nbsp;|&nbsp;QFrame::Plain&nbsp;); </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;ui-&gt;qwtPlot-&gt;canvas()-&gt;setBorderRadius(&nbsp;15&nbsp;);</li> 
 </ol> 
 </div> 设置qwtPlot的画布：（白色填充）&nbsp;QPalette&nbsp;canvasPalette(&nbsp;Qt::white&nbsp;);canvasPalette.setColor(&nbsp;QPalette::Foreground,&nbsp;QColor(&nbsp;133,&nbsp;190,&nbsp;232&nbsp;)&nbsp;);&nbsp;ui-&gt;qwtPlot-&gt;canvas()-&gt;setPalette(&nbsp;canvasPalette&nbsp;); 
 <div style="word-wrap:break-word; border:1px solid rgb(221,221,221); width:704.292px; overflow:auto; margin:0px 0px 1.1em; padding:0px; word-break:break-all; letter-spacing:0.1px; font-family:Consolas,monospace"> 
 <ol style="word-wrap:break-word; margin:0px 1px 0px 0px; padding:5px 0px; list-style:none; color:rgb(92,92,92); line-height:1.3"> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> QPalette canvasPalette(&nbsp;Qt::white&nbsp;); </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;canvasPalette.setColor(&nbsp;QPalette::Foreground,&nbsp;QColor(&nbsp;133,&nbsp;190,&nbsp;232&nbsp;)&nbsp;); </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;ui-&gt;qwtPlot-&gt;canvas()-&gt;setPalette(&nbsp;canvasPalette&nbsp;);</li> 
 </ol> 
 </div> 设置整个界面的颜色：&nbsp;QPalette&nbsp;pal&nbsp;=&nbsp;palette();&nbsp;const&nbsp;QColor&nbsp;buttonColor&nbsp;=&nbsp;pal.color(QPalette::Button&nbsp;);&nbsp;QLinearGradient&nbsp;gradient(&nbsp;0,&nbsp;0,&nbsp;0,&nbsp;1&nbsp;);&nbsp;gradient.setCoordinateMode(QGradient::StretchToDeviceMode&nbsp;);&nbsp;gradient.setColorAt(&nbsp;0.0,&nbsp;Qt::white&nbsp;);gradient.setColorAt(&nbsp;0.7,&nbsp;buttonColor&nbsp;);&nbsp;gradient.setColorAt(&nbsp;1.0,&nbsp;buttonColor&nbsp;);pal.setBrush(&nbsp;QPalette::Window,&nbsp;gradient&nbsp;);&nbsp;setPalette(&nbsp;pal&nbsp;); 
 <div style="word-wrap:break-word; border:1px solid rgb(221,221,221); width:704.292px; overflow:auto; margin:0px 0px 1.1em; padding:0px; word-break:break-all; letter-spacing:0.1px; font-family:Consolas,monospace"> 
 <ol style="word-wrap:break-word; margin:0px 1px 0px 0px; padding:5px 0px; list-style:none; color:rgb(92,92,92); line-height:1.3"> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> QPalette pal&nbsp;=&nbsp;palette(); </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;const&nbsp;QColor buttonColor&nbsp;=&nbsp;pal.color(&nbsp;QPalette::Button&nbsp;); </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;QLinearGradient gradient(&nbsp;0,&nbsp;0,&nbsp;0,&nbsp;1&nbsp;); </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;gradient.setCoordinateMode(&nbsp;QGradient::StretchToDeviceMode&nbsp;); </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;gradient.setColorAt(&nbsp;0.0,&nbsp;Qt::white&nbsp;); </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;gradient.setColorAt(&nbsp;0.7,&nbsp;buttonColor&nbsp;); </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;gradient.setColorAt(&nbsp;1.0,&nbsp;buttonColor&nbsp;); </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;pal.setBrush(&nbsp;QPalette::Window,&nbsp;gradient&nbsp;); </li> 
 <li style="word-wrap:break-word; margin:0px; padding:0px 0px 0px 10px; list-style:decimal outside"> &nbsp;&nbsp;&nbsp;&nbsp;setPalette(&nbsp;pal&nbsp;);</li> 
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