BreakpointWidget: Fix Qt centering issues with a Custom Delegate

Source/Core/DolphinQt/Debugger/BreakpointWidget.cpp

@@ -3,9 +3,13 @@
 
 #include "DolphinQt/Debugger/BreakpointWidget.h"
 
+#include <QApplication>
 #include <QHeaderView>
 #include <QMenu>
+#include <QPainter>
 #include <QSignalBlocker>
+#include <QStyleOptionViewItem>
+#include <QStyledItemDelegate>
 #include <QTableWidget>
 #include <QToolBar>
 #include <QVBoxLayout>
@@ -36,6 +40,39 @@ enum CustomRole
 };
 }
 
+// Fix icons not centering properly in a QTableWidget.
+class CustomDelegate : public QStyledItemDelegate
+{
+public:
+  CustomDelegate(BreakpointWidget* parent) : QStyledItemDelegate(parent) {}
+
+private:
+  void paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const
+  {
+    Q_ASSERT(index.isValid());
+
+    // Fetch normal drawing logic.
+    QStyleOptionViewItem opt = option;
+    initStyleOption(&opt, index);
+
+    // Disable drawing icon the normal way.
+    opt.icon = QIcon();
+    opt.decorationSize = QSize(0, 0);
+
+    // Default draw command for paint.
+    QApplication::style()->drawControl(QStyle::CE_ItemViewItem, &opt, painter, 0);
+
+    // Draw pixmap at the center of the tablewidget cell
+    QPixmap pix = qvariant_cast<QPixmap>(index.data(Qt::DecorationRole));
+    if (!pix.isNull())
+    {
+      const QRect r = option.rect;
+      const QPoint p = QPoint((r.width() - pix.width()) / 2, (r.height() - pix.height()) / 2);
+      painter->drawPixmap(r.topLeft() + p, pix);
+    }
+  }
+};
+
 BreakpointWidget::BreakpointWidget(QWidget* parent)
     : QDockWidget(parent), m_system(Core::System::GetInstance())
 {
@@ -88,6 +125,7 @@ void BreakpointWidget::CreateWidgets()
   m_toolbar->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
 
   m_table = new QTableWidget;
+  m_table->setItemDelegate(new CustomDelegate(this));
   m_table->setTabKeyNavigation(false);
   m_table->setContentsMargins(0, 0, 0, 0);
   m_table->setColumnCount(6);

Source/Core/DolphinQt/Debugger/BreakpointWidget.h

@@ -17,6 +17,8 @@ namespace Core
 class System;
 }
 
+class CustomDelegate;
+
 class BreakpointWidget : public QDockWidget
 {
   Q_OBJECT