Mercurial > projects > qtd
annotate examples/qwt/simpleplot/simple.d @ 383:bd7f485e3573
More debug fixes
| author | Max Samukha <maxter@spambox.com> |
|---|---|
| date | Mon, 12 Jul 2010 22:50:58 +0300 |
| parents | 347e4c7a9ba1 |
| children |
| rev | line source |
|---|---|
| 378 | 1 module simple; |
| 2 | |
| 3 import std.math; | |
| 4 | |
| 5 import qt.gui.QApplication; | |
| 6 import qt.qwt.QwtPlot; | |
| 7 import qt.qwt.QwtPlotMarker; | |
| 8 import qt.qwt.QwtPlotCurve; | |
| 9 import qt.qwt.QwtLegend; | |
| 10 import qt.qwt.QwtData; | |
| 11 import qt.qwt.QwtText; | |
| 12 | |
| 13 //----------------------------------------------------------------- | |
| 14 // simple.d | |
| 15 // | |
| 16 // A simple example which shows how to use QwtPlot and QwtData | |
| 17 //----------------------------------------------------------------- | |
| 18 | |
|
381
347e4c7a9ba1
make QwtD compile on Windows@
Eldar Insafutdinov <e.insafutdinov@gmail.com>
parents:
380
diff
changeset
|
19 // hack to avoid linker error (undefined symbols), possibly a compiler bug |
| 378 | 20 real mysin(real arg) |
| 21 { | |
| 22 return sin(arg); | |
| 23 } | |
| 24 | |
| 25 real mycos(real arg) | |
| 26 { | |
| 27 return cos(arg); | |
| 28 } | |
| 29 | |
| 30 alias real function(real) double_func; | |
| 31 | |
| 32 class SimpleData: QwtData | |
| 33 { | |
| 34 // The x values depend on its index and the y values | |
| 383 | 35 // can be calculated from the corresponding x value. |
| 378 | 36 // So we don't need to store the values. |
| 383 | 37 // Such an implementation is slower because every point |
| 378 | 38 // has to be recalculated for every replot, but it demonstrates how |
| 39 // QwtData can be used. | |
| 40 | |
| 41 public: | |
| 42 this(const double_func y, size_t size) | |
| 43 { | |
| 44 d_size = size; | |
| 45 d_y = y; | |
| 46 } | |
| 47 | |
| 48 QwtData copy() const | |
| 49 { | |
| 50 return new SimpleData(d_y, d_size); | |
| 51 } | |
| 52 | |
| 53 size_t size() const | |
| 54 { | |
| 55 return d_size; | |
| 56 } | |
| 57 | |
| 58 double x(size_t i) const | |
| 59 { | |
| 60 return 0.1 * i; | |
| 61 } | |
| 62 | |
| 63 double y(size_t i) const | |
| 64 { | |
| 65 return d_y(x(i)); | |
| 66 } | |
| 67 private: | |
| 68 size_t d_size; | |
| 69 const double_func d_y; | |
| 70 }; | |
| 71 | |
| 72 class Plot : QwtPlot | |
| 73 { | |
| 74 public: | |
| 75 this() | |
| 76 { | |
| 77 setTitle("A Simple QwtPlot Demonstration"); | |
| 380 | 78 insertLegend(new QwtLegend(), QwtPlot.RightLegend); |
| 378 | 79 |
| 80 // Set axis titles | |
| 379 | 81 setAxisTitle(xBottom, "x -->"); |
| 82 setAxisTitle(yLeft, "y -->"); | |
| 383 | 83 |
| 378 | 84 // Insert new curves |
| 85 auto cSin = new QwtPlotCurve("y = sin(x)"); | |
| 86 cSin.setRenderHint(QwtPlotItem.RenderAntialiased); | |
| 87 cSin.setPen(new QPen(new QColor(Qt.red))); | |
| 88 cSin.attach(this); | |
| 89 | |
| 90 auto cCos = new QwtPlotCurve("y = cos(x)"); | |
| 91 cCos.setRenderHint(QwtPlotItem.RenderAntialiased); | |
| 92 cCos.setPen(new QPen(new QColor(Qt.blue))); | |
| 93 cCos.attach(this); | |
| 94 | |
| 95 // Create sin and cos data | |
| 96 const int nPoints = 100; | |
| 97 cSin.setData(new SimpleData(&mysin, nPoints)); | |
| 98 cCos.setData(new SimpleData(&mycos, nPoints)); | |
| 99 | |
| 100 // Insert markers | |
| 383 | 101 |
| 378 | 102 // ...a horizontal line at y = 0... |
| 103 auto mY = new QwtPlotMarker(); | |
| 104 mY.setLabel(new QwtText("y = 0")); | |
| 105 mY.setLabelAlignment(Qt.AlignRight | Qt.AlignTop); | |
| 106 mY.setLineStyle(QwtPlotMarker.HLine); | |
| 107 mY.setYValue(0.0); | |
| 108 mY.attach(this); | |
| 109 | |
| 110 // ...a vertical line at x = 2 * pi | |
| 111 auto mX = new QwtPlotMarker(); | |
| 112 mX.setLabel(new QwtText("x = 2 pi")); | |
| 113 mX.setLabelAlignment(Qt.AlignLeft | Qt.AlignBottom); | |
| 114 mX.setLabelOrientation(Qt.Vertical); | |
| 115 mX.setLineStyle(QwtPlotMarker.VLine); | |
| 116 mX.setLinePen(new QPen(new QBrush(Qt.black), 0, Qt.DashDotLine)); | |
| 117 mX.setXValue(2.0 * PI); | |
| 118 mX.attach(this); | |
| 119 } | |
| 120 | |
| 121 }; | |
| 122 | |
| 123 int main(string[] args) | |
| 124 { | |
| 125 auto a = new QApplication(args); | |
| 126 | |
| 127 scope plot = new Plot; | |
| 128 plot.resize(600,400); | |
| 129 plot.show(); | |
| 383 | 130 return a.exec(); |
| 378 | 131 } |