Core: Introduce WelcomePageHelpers::drawCardBackground

Pulled out of the ExtensionManager. It will also be used by
the Welcomescreen pages.

Change-Id: Ic5c67759e7f3af6a3b51968b7ae072c7058109b3
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>

src/plugins/coreplugin/welcomepagehelper.cpp

@@ -19,6 +19,7 @@
 #include <QLabel>
 #include <QMouseEvent>
 #include <QPainter>
+#include <QPainterPath>
 #include <QPixmapCache>
 #include <QScrollArea>
 #include <QTimer>
@@ -57,6 +58,25 @@ QWidget *panelBar(QWidget *parent)
     return frame;
 }
 
+void drawCardBackground(QPainter *painter, const QRectF &rect,
+                        const QBrush &fill, const QPen &pen, qreal rounding)
+{
+    const qreal strokeWidth = pen.style() == Qt::NoPen ? 0 : pen.widthF();
+    const qreal strokeShrink = strokeWidth / 2;
+    const QRectF itemRectAdjusted = rect.adjusted(strokeShrink, strokeShrink,
+                                                  -strokeShrink, -strokeShrink);
+    const qreal roundingAdjusted = rounding - strokeShrink;
+    QPainterPath itemOutlinePath;
+    itemOutlinePath.addRoundedRect(itemRectAdjusted, roundingAdjusted, roundingAdjusted);
+
+    painter->save();
+    painter->setRenderHint(QPainter::Antialiasing);
+    painter->setBrush(fill);
+    painter->setPen(pen);
+    painter->drawPath(itemOutlinePath);
+    painter->restore();
+}
+
 } // namespace WelcomePageHelpers
 
 SearchBox::SearchBox(QWidget *parent)

src/plugins/coreplugin/welcomepagehelper.h

@@ -8,6 +8,7 @@
 
 #include <QElapsedTimer>
 #include <QListView>
+#include <QPen>
 #include <QPointer>
 #include <QSortFilterProxyModel>
 #include <QStackedWidget>
@@ -36,6 +37,9 @@ constexpr QSize GridItemImageSize(GridItemWidth - GridItemGap
                                       - 67);                   // Bottom margin (for title + tags)
 
 CORE_EXPORT QWidget *panelBar(QWidget *parent = nullptr);
+CORE_EXPORT void drawCardBackground(QPainter *painter, const QRectF &rect,
+                                    const QBrush &fill, const QPen &pen = QPen(Qt::NoPen),
+                                    qreal rounding = 5.0);
 
 } // namespace WelcomePageHelpers
 

src/plugins/extensionmanager/extensionsbrowser.cpp

@@ -339,19 +339,11 @@ public:
         {
             const bool selected = option.state & QStyle::State_Selected;
             const bool hovered = option.state & QStyle::State_MouseOver;
-            constexpr qreal strokeWidth = 1;
-            constexpr qreal shrink = strokeWidth / 2;
-            const QRectF itemRectAdjusted = itemRect.adjusted(shrink, shrink, -shrink, -shrink);
-            constexpr qreal rounding = 4.5;
-            QPainterPath itemOutlinePath;
-            itemOutlinePath.addRoundedRect(itemRectAdjusted, rounding, rounding);
             const QColor fillColor = creatorTheme()->color(hovered ? Theme::Token_Foreground_Muted
                                                                    : Theme::Token_Background_Muted);
             const QColor strokeColor = creatorTheme()->color(selected ? Theme::Token_Stroke_Strong
                                                                       : Theme::Token_Stroke_Subtle);
-            painter->setBrush(fillColor);
+            WelcomePageHelpers::drawCardBackground(painter, itemRect, fillColor, strokeColor);
-            painter->setPen(strokeColor);
-            painter->drawPath(itemOutlinePath);
         }
         {
             constexpr QRectF bigCircle(16, 16, 48, 48);