Initial commit

Lts/Common/LtsWidgets/lts_image_editor.cpp

@@ -0,0 +1,123 @@
+/**
+ * @RDE_HEADER@
+ * An Image Editor which shows an Image, and emits a signal when clicked (to edit/swap an Image)
+ * $Id$
+ * $HeadURL$
+ * $Author$
+ *
+ * Created by Mike Wille, SLSE, 2016-09-19
+ */
+
+#include "lts_image_editor.h"
+
+#include <QPainter>
+#include <QPaintEvent>
+#include <QBrush>
+#include <QPen>
+#include <QRect>
+#include <QEvent>
+
+using namespace LtsWidgets;
+
+
+LtsImageEditor::LtsImageEditor(QWidget *parent)
+  : QWidget(parent)
+  , m_isHovered(false)
+  , m_menuEnabled(true) // enabled by default
+  , m_bDrawOuterRect(true)
+{}
+
+
+void LtsImageEditor::setPixmap(const QPixmap &pixmap)
+{
+  if (pixmap.isNull()) // invalid / empty pixmap given, trying to replace it with one from lts_resources
+    m_pixmap = QPixmap(QStringLiteral(":style/noimage.png")); // when this fails, the pixmap is still invalid, so no checks needed   TODO: add noimage.png !
+  else
+    m_pixmap = pixmap;
+
+  update();
+  emit imageChanged();
+}
+
+
+void LtsImageEditor::enterEvent(QEvent *)
+{
+  //qWarning() << "enter";
+  m_isHovered = true;
+  update();
+}
+
+
+void LtsImageEditor::leaveEvent(QEvent *)
+{
+  //qWarning() << "leave";
+  m_isHovered = false;
+  update();
+}
+
+
+bool LtsImageEditor::event(QEvent *event)
+{
+  if (event->type() == QEvent::MouseButtonPress && m_menuEnabled)
+  {
+    emit signalClicked();
+    event->accept();
+    m_isHovered = false; // unhovered on click
+    update();
+    return true;
+  }
+
+  return QWidget::event(event); // otherwise..
+}
+
+
+void LtsImageEditor::paintEvent(QPaintEvent* event) // TODO: colors from palette (style plugin) ?
+{
+  QPainter p(this);
+
+  // draw profile picture
+  p.setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
+  QBrush brush = QColor(QStringLiteral("white")); // TODO: get from palette
+
+
+  if (!m_pixmap.isNull())
+  {
+    if (!(m_isHovered && m_menuEnabled)) // draw if NOT hovered or draw when hovered but menu is disabled
+    {
+      const QSize s(size());
+      const QPixmap pixmap(m_pixmap.scaled(s, Qt::KeepAspectRatio, Qt::SmoothTransformation));
+      const int x = qRound((s.width() - pixmap.width()) / 2.);
+      const int y = qRound((s.height() - pixmap.height()) / 2.);
+      if (m_bDrawOuterRect)
+      {
+        p.setPen(QPen(QColor("gray"), 2));
+        p.drawRect(rect());
+      }
+      p.drawPixmap(x, y, pixmap);
+      event->accept();
+      return;
+    }
+  }
+
+
+  // draw frame
+  p.setPen(QPen(QColor("gray"), 2));
+  p.setBrush(brush);
+  p.drawRect(rect());
+
+
+  // draw menu icon
+  if (m_isHovered && m_menuEnabled)
+  {
+    p.setPen(QPen(QColor(QStringLiteral("gray")), (size().height() / 48 * 2))); // respect height, width is unnecessary
+
+    double xc = size().width()/2.012;
+    double yc = size().height()/2.012;
+
+    p.drawLine(QPointF(xc - (xc/2.01f), yc - (yc/3.01f)), QPointF(xc + (xc/2.02f), yc - (yc/3.02f)));
+    p.drawLine(QPointF(xc - (xc/2.01f), yc - 0.01f),      QPointF(xc + (xc/2.02f), yc - 0));
+    p.drawLine(QPointF(xc - (xc/2.01f), yc + (yc/3.01f)), QPointF(xc + (xc/2.02f), yc + (yc/3.02f)));
+  }
+
+  event->accept();
+}