Initial commit

Lts/Common/LtsWidgets/lts_led_widget.cpp

@@ -0,0 +1,154 @@
+/**
+  * @RDE_HEADER@
+  * Class of Led Widget
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  */
+
+#include "lts_led_widget.h"
+#include <QPainter>
+#include <QPropertyAnimation>
+#include <QResizeEvent>
+namespace LtsWidgets
+{
+
+void LtsLedWidget::resizeEvent(QResizeEvent *event)
+{
+  switch (m_aspectHint) {
+  case AspectHint::NoHint:
+  {
+    // NOTE: the next 4 lines would overwrite set properties from ui files
+//    setMinimumWidth(0);
+//    setMaximumWidth(65000);
+//    setMinimumHeight(0);
+//    setMaximumHeight(65000);
+    QWidget::resizeEvent(event);
+    break;
+  }
+  case AspectHint::HeightIsWidth:
+    setMinimumHeight(event->size().width());
+    setMaximumHeight(event->size().width());
+    setMinimumWidth(0);
+    setMaximumWidth(65000);
+    break;
+  case AspectHint::WidthIsHeight:
+    setMinimumHeight(0);
+    setMaximumHeight(65000);
+    setMinimumWidth(event->size().height());
+    setMaximumWidth(event->size().height());
+    break;
+  }
+}
+
+/**
+  * The following values were determined by trial and error:
+  */
+static constexpr double GRADIENT_KEY_LOWER         =   0.3;
+static constexpr double GRADIENT_KEY_UPPER         =   0.9;
+static constexpr int    GRADIENT_VALUE_LOWER       = 125;
+static constexpr int    GRADIENT_VALUE_UPPER       = 165;
+static constexpr double GRADIENT_CENTER_OFFSET     =   5.0;
+static constexpr double GRADIENT_FOCALPOINT_OFFSET =   2.7;
+static constexpr double PERCENTAGE_OF_BORDER       =   0.1;
+static constexpr int    DARK_FACTOR                = 200;
+
+LtsLedWidget::LtsLedWidget(QWidget *parent, const QColor &oncolor, const QColor &offcolor, bool useGradient, int animtime)
+  : QWidget(parent)
+  , m_status(true)
+  , m_oncolor(oncolor)
+  , m_offcolor(offcolor)
+  , m_currentcolor(oncolor)
+  , m_gradient(useGradient)
+  , m_animTime(animtime)
+{
+  setObjectName(QString::fromUtf8("LtsLedWidget"));
+}
+
+void LtsLedWidget::paintEvent(QPaintEvent *pe)
+{
+  Q_UNUSED(pe);
+  QPainter p;
+  p.begin(this);
+  p.setOpacity(QWidget::isEnabled() ? 1.00 : 0.5);
+
+  int minSize = height() > width() ? width() : height();
+  if (m_gradient)
+  {
+    QRadialGradient grad(QPointF(width(), height()) / GRADIENT_CENTER_OFFSET,       // Center
+                         minSize,                                                   // Radius
+                         QPointF(width(), height()) / GRADIENT_FOCALPOINT_OFFSET);  // FocalPoint
+    grad.setColorAt(GRADIENT_KEY_LOWER, m_currentcolor.lighter(GRADIENT_VALUE_LOWER));
+    grad.setColorAt(GRADIENT_KEY_UPPER, m_currentcolor.darker(GRADIENT_VALUE_UPPER));
+    p.setBrush(grad);
+  }
+  else
+    p.setBrush(QBrush(m_currentcolor, Qt::SolidPattern));
+
+  p.setRenderHint(QPainter::Antialiasing);
+  p.setPen(QPen(Qt::black, PERCENTAGE_OF_BORDER * minSize, Qt::SolidLine, Qt::SquareCap));
+  p.drawEllipse(QPointF(width(), height()) / 2.0,
+                width()  / (2.0 * (1.00 + PERCENTAGE_OF_BORDER)),
+                height() / (2.0 * (1.00 + PERCENTAGE_OF_BORDER)));
+  p.end();
+}
+
+void LtsLedWidget::animate()
+{
+  QPropertyAnimation *anim = new QPropertyAnimation(this, "currentcolor");
+  anim->setDuration(m_animTime);
+  anim->setEasingCurve(QEasingCurve::OutBack);
+  anim->setStartValue(m_currentcolor);
+  anim->setEndValue(m_status ? m_oncolor : m_offcolor == Qt::black ? m_oncolor.darker(DARK_FACTOR) : m_offcolor);
+  anim->start(QPropertyAnimation::DeleteWhenStopped);
+}
+
+void LtsLedWidget::setStatus(bool status)
+{
+  if (m_status == status)
+    return;
+  m_status = status;
+  animate();
+}
+
+void LtsLedWidget::setUseGradient(bool useGradient)
+{
+  if (m_gradient == useGradient)
+    return;
+  m_gradient = useGradient;
+  repaint();
+}
+
+void LtsLedWidget::setColor(const QColor &oncolor, const QColor &offcolor)
+{
+  setOnColor(oncolor);
+  setOffColor(offcolor);
+}
+
+void LtsLedWidget::setOnColor(const QColor &oncolor)
+{
+  if (m_oncolor == oncolor)
+    return;
+  m_oncolor = oncolor;
+  if (m_status)
+    animate();
+}
+
+void LtsLedWidget::setOffColor(const QColor &offcolor)
+{
+  if (m_offcolor == offcolor)
+    return;
+  m_offcolor = offcolor;
+  if (!m_status)
+    animate();
+}
+
+void LtsLedWidget::setCurrentColor(const QColor &currentcolor)
+{
+  if (m_currentcolor == currentcolor)
+    return;
+  m_currentcolor = currentcolor;
+  repaint();
+}
+
+} // namespace namespace LtsWidgets