add KeyDelegate

CMakeLists.txt

@@ -984,6 +984,7 @@ add_library(mixxx-lib STATIC EXCLUDE_FROM_ALL
   src/library/tabledelegates/bpmdelegate.cpp
   src/library/tabledelegates/colordelegate.cpp
   src/library/tabledelegates/coverartdelegate.cpp
+  src/library/tabledelegates/keydelegate.cpp
   src/library/tabledelegates/locationdelegate.cpp
   src/library/tabledelegates/multilineeditdelegate.cpp
   src/library/tabledelegates/playcountdelegate.cpp

src/library/basetracktablemodel.cpp

@@ -9,6 +9,7 @@
 #include "library/tabledelegates/bpmdelegate.h"
 #include "library/tabledelegates/colordelegate.h"
 #include "library/tabledelegates/coverartdelegate.h"
+#include "library/tabledelegates/keydelegate.h"
 #include "library/tabledelegates/locationdelegate.h"
 #include "library/tabledelegates/multilineeditdelegate.h"
 #include "library/tabledelegates/playcountdelegate.h"
@@ -121,7 +122,7 @@ void BaseTrackTableModel::setApplyPlayedTrackColor(bool apply) {
     s_bApplyPlayedTrackColor = apply;
 }
 
-//static
+// static
 QStringList BaseTrackTableModel::defaultTableColumns() {
     return kDefaultTableColumns;
 }
@@ -506,6 +507,8 @@ QAbstractItemDelegate* BaseTrackTableModel::delegateForColumn(
                 this,
                 &BaseTrackTableModel::slotRefreshCoverRows);
         return pCoverArtDelegate;
+    } else if (index == fieldIndex(ColumnCache::COLUMN_LIBRARYTABLE_KEY)) {
+        return new KeyDelegate(pTableView);
     }
     return nullptr;
 }

src/library/tabledelegates/keydelegate.cpp

@@ -0,0 +1,37 @@
+#include "library/tabledelegates/keydelegate.h"
+
+#include <qnamespace.h>
+
+#include <QPainter>
+#include <QStyle>
+#include <QTableView>
+
+#include "moc_keydelegate.cpp"
+#include "util/color/rgbcolor.h"
+
+KeyDelegate::KeyDelegate(QTableView* pTableView)
+        : TableItemDelegate(pTableView) {
+}
+
+void KeyDelegate::paintItem(
+        QPainter* painter,
+        const QStyleOptionViewItem& option,
+        const QModelIndex& index) const {
+    const auto color = mixxx::RgbColor::fromQVariant(index.data());
+
+    if (color) {
+        painter->fillRect(option.rect, mixxx::RgbColor::toQColor(color));
+    } else {
+        // Filter out track color that is hidden
+        if (option.state & QStyle::State_Selected) {
+            painter->fillRect(option.rect, option.palette.highlight());
+        }
+    }
+
+    // Draw a border if the color cell has focus
+    if (option.state & QStyle::State_HasFocus) {
+        drawBorder(painter, m_focusBorderColor, option.rect);
+    }
+
+    // QStyledItemDelegate::paint(painter, option, index);
+}

src/library/tabledelegates/keydelegate.h

@@ -0,0 +1,18 @@
+#pragma once
+
+#include "library/tabledelegates/tableitemdelegate.h"
+
+class QModelIndex;
+class QPainter;
+class QStyleOptionViewItem;
+
+class KeyDelegate : public TableItemDelegate {
+    Q_OBJECT
+  public:
+    explicit KeyDelegate(QTableView* pTableView);
+
+    void paintItem(
+            QPainter* painter,
+            const QStyleOptionViewItem& option,
+            const QModelIndex& index) const override;
+};