WCoverArt*: Add tooltip for cover image

Author: cr7pt0gr4ph7

src/skin/legacy/tooltips.cpp

@@ -1004,6 +1004,8 @@ void Tooltips::addStandardTooltips() {
             << tr("Audio Latency Overload Indicator")
             << tr("Indicates that the audio buffer is too small to do all audio processing.");
 
+    // Note: Some of the coverart strings below are reused in src/widget/wcoverartlabel.cpp.
+    // Please sync changes made here to wcoverartlabel.cpp, and vice versa.
     add("coverart")
             << tr("Cover Art")
             << tr("Displays cover artwork of the loaded track.")

src/widget/wcoverartlabel.cpp

@@ -48,6 +48,20 @@ WCoverArtLabel::WCoverArtLabel(QWidget* pParent, WCoverArtMenu* pCoverMenu)
     setFrameShape(QFrame::Box);
     setAlignment(Qt::AlignCenter);
     setPixmapAndResize(m_defaultCover);
+
+    // Note: We reuse existing translation strings from src/skin/legacy/tooltips.cpp
+    // to avoid having to retranslate basically the same content twice.
+    // Please sync changes made here to tooltips.cpp, and vice versa.
+    QString tooltip = QString("%1: %2").arg(
+            tr("Left-click"),
+            tr("Opens separate artwork viewer."));
+    if (m_pCoverMenu) {
+        tooltip += "\n";
+        tooltip += QString("%1: %2").arg(
+                tr("Right-click"),
+                tr("Displays options for editing cover artwork."));
+    }
+    setToolTip(tooltip);
 }
 
 WCoverArtLabel::~WCoverArtLabel() = default;