33 lines
711 B
C++
33 lines
711 B
C++
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#include "widgetcurveeditor.h"
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#include <QPainter>
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WidgetCurveEditor::WidgetCurveEditor(QWidget *parent) : QWidget(parent)
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{
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_curve = curveCreate();
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setMinimumSize(500, 500);
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setMaximumSize(500, 500);
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}
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WidgetCurveEditor::~WidgetCurveEditor()
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{
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curveDelete(_curve);
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}
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void WidgetCurveEditor::paintEvent(QPaintEvent* event)
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{
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double position, value;
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QPainter painter(this);
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painter.fillRect(0, 0, 500, 500, QColor(255, 255, 255));
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painter.setPen(QColor(255, 0, 0));
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for (int x = 0; x < 500; x++)
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{
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position = ((double)x) / 499.0;
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value = curveGetValue(_curve, position);
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painter.drawPoint(x, 499 - (int)(value * 499.0));
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}
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}
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