Initial commit

Lts/Tools/QLedLine/qledline.cpp

@@ -0,0 +1,223 @@
+/**
+  * @RDE_HEADER@
+  * Implements n QLedChars to display a line of Text/Image
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Florian Schult, SLSE, 2016-03-18
+  */
+#include "qledline.h"
+
+#include <QString>
+#include <QLayout>
+#include <QTimer>
+#include <QImage>
+
+#include "qledchar.h"
+
+QLedLine::QLedLine(QWidget *parent)
+  : QWidget(parent)
+  , m_charCount(0)
+  , m_height(0)
+  , m_visible(true)
+  , m_text()
+  , m_layout(new QHBoxLayout(this))
+  , m_chars()
+  , m_flashTimer(new QTimer(this))
+  , m_color(Qt::red)     // Standard color
+  , m_image()
+{
+  m_layout->setSpacing(0);
+  m_layout->setContentsMargins(0,0,0,0);
+  m_layout->setMargin(0);
+
+  QSpacerItem *sp1 = new QSpacerItem(0,0, QSizePolicy::Expanding, QSizePolicy::Expanding);
+  QSpacerItem *sp2 = new QSpacerItem(0,0, QSizePolicy::Expanding, QSizePolicy::Expanding);
+
+  m_layout->addSpacerItem(sp1);
+  m_layout->addSpacerItem(sp2);
+  m_layout->setAlignment(m_layout, Qt::AlignHCenter);
+}
+
+QLedLine::~QLedLine()
+{
+  qDeleteAll(m_chars);
+  // optional. They have "this" as parent and are QT.
+  delete m_layout;
+  delete m_flashTimer;
+}
+
+QString QLedLine::shownText() const
+{
+  return m_text.leftJustified(m_chars.size(), QLatin1Char(' '), true);
+}
+
+bool QLedLine::isTextVisible() const
+{
+  return m_visible;
+}
+
+int QLedLine::flashTime() const
+{
+  return m_flashTimer->interval();
+}
+
+QColor QLedLine::color() const
+{
+  return m_color;
+}
+
+void QLedLine::setText(const QString &text)
+{
+  m_text = text;
+
+  // Todo: Arabic: RightJustified? Automatic?
+  QString shown = shownText();
+  for (int i=0; i<m_chars.size(); ++i)
+    m_chars[i]->setLetter(shown[i]);
+}
+
+// Expects a properly sized QImage, corresponding to the count and Pixelsizes of QLedLine and QLedChar
+void QLedLine::setImage(const QImage &image)
+{
+  m_image = image;
+  QImage charImage;
+  QSize  charSize = m_chars[0]->charSize();
+
+  for (int i=0; i<m_chars.size(); ++i)
+  {
+    charImage = m_image.copy((charSize.width() * i), 0, charSize.width(), charSize.height());
+    m_chars[i]->setImage(charImage);
+  }
+}
+
+QSize QLedLine::charSize() const
+{
+  return m_chars[0]->charSize();
+}
+
+QString QLedLine::text() const
+{
+  return m_text;
+}
+
+void QLedLine::addChar()
+{
+  QLedChar *ledChar = new QLedChar(m_height, this, m_text[m_chars.size()]);
+  ledChar->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
+  if (!m_chars.isEmpty())
+    ledChar->setLetterVisible(m_chars[0]->letterVisible());
+  connect(m_flashTimer, &QTimer::timeout, ledChar, &QLedChar::onFlashTimerTimeout);
+  ledChar->setColor(m_color);
+
+  // Takes the last stretch-item and puts it behind the new added ledChar
+  QLayoutItem *spacer = m_layout->takeAt(m_layout->count()-1);
+  m_layout->addWidget(ledChar);
+  m_layout->addItem(spacer);
+
+  m_chars.append(ledChar);
+  ledChar->setLetter(shownText().at(m_chars.size()-1));
+}
+
+void QLedLine::deleteChar()
+{
+  if (m_chars.isEmpty())
+    return;
+
+  delete m_chars.last();
+  m_chars.remove(m_chars.size()-1);
+}
+
+void QLedLine::setCharCount(int charCount)
+{
+  m_charCount = charCount;
+  while(m_chars.size() != m_charCount)
+  {
+    if(m_chars.size() > m_charCount)
+      deleteChar();
+    else if(m_chars.size() < m_charCount)
+      addChar();
+  }
+}
+
+int QLedLine::charCount() const
+{
+  return m_charCount;
+}
+
+void QLedLine::setHeight(int height)
+{
+  m_height = height;
+
+  for(int i=0; i<m_chars.size(); ++i)
+  {
+    m_chars[i]->setCharHeight(m_height);
+  }
+  setText(m_text);
+}
+
+int QLedLine::height() const
+{
+  return m_height;
+}
+
+void QLedLine::setCharCountAndHeight(int charCount, int height)
+{
+  setHeight(height);
+  setCharCount(charCount);
+}
+
+void QLedLine::setColor(const QColor &color)
+{
+  m_color = color;
+  for (int i=0; i<m_charCount; ++i)
+    m_chars[i]->setColor(color);
+}
+
+void QLedLine::clear()
+{
+  for (int i=0; i<m_charCount; ++i)
+  {
+    m_chars[i]->setLetterVisible(false);
+    m_chars[i]->setLetterVisible(true);
+  }
+}
+
+void QLedLine::setFlashing(int msecs)
+{
+  m_flashTimer->setInterval(msecs);
+  if (msecs == 0)
+  {
+    if (m_visible)
+    {
+      for (int i = 0; i < m_chars.size(); ++i)
+        m_chars[i]->setLetterVisible();
+    }
+    m_flashTimer->stop();
+  }
+  else
+  {
+    if(m_visible)
+      m_flashTimer->start();
+    else
+      m_flashTimer->stop();
+  }
+}
+
+void QLedLine::setTextVisible(bool visible)
+{
+  m_visible = visible;
+  for (int i=0; i<m_chars.size(); ++i)
+    m_chars[i]->setLetterVisible(m_visible);
+
+  if(m_visible)
+  {
+    if(m_flashTimer->interval() > 0)
+      m_flashTimer->start();
+  }
+  else
+  {
+    m_flashTimer->stop();
+  }
+}
+