fix: blobs now allow to be drawn in device pixels to stay sharp

Plugins/ZShell/Components/snaplayout.hpp

@@ -1,6 +1,8 @@
 #pragma once
 
+#include <QHash>
 #include <QPointer>
+#include <QtMath>
 #include <QtGui/private/qabstractlayoutstyleinfo_p.h>
 #include <QtGui/private/qgridlayoutengine_p.h>
 #include <QtQuickLayouts/private/qquickgridlayoutengine_p.h>
@@ -20,6 +22,20 @@ class SnapLayoutStyleInfo : public QAbstractLayoutStyleInfo {
 	bool hasChangedCore() const override;
 };
 
+class SnapGridLayoutEngine : public QGridLayoutEngine {
+	public:
+	SnapGridLayoutEngine() : QGridLayoutEngine(Qt::AlignVCenter, false) {}
+
+	QQuickGridLayoutItem* findLayoutItem(QQuickItem* item) const {
+		for (int i = int(q_items.size()) - 1; i >= 0; --i) {
+			QQuickGridLayoutItem* layoutItem =
+				static_cast<QQuickGridLayoutItem*>(q_items.at(i));
+			if (layoutItem->layoutItem() == item) return layoutItem;
+		}
+		return nullptr;
+	}
+};
+
 class SnapGridLayoutItem : public QQuickGridLayoutItem {
 	public:
 	SnapGridLayoutItem(
@@ -28,13 +44,12 @@ class SnapGridLayoutItem : public QQuickGridLayoutItem {
 		int column,
 		int rowSpan,
 		int columnSpan,
-		Qt::Alignment alignment,
-		SnapLayout* layout);
+		Qt::Alignment alignment);
 
 	void setGeometry(const QRectF& rect) override;
 
-	private:
-	SnapLayout* m_layout;
+	QRectF engineRect;
+	bool placed = false;
 };
 
 class SnapLayout : public QQuickLayout {
@@ -101,6 +116,10 @@ class SnapLayout : public QQuickLayout {
 	void insertLayoutItems();
 	void removeGridItem(QGridLayoutItem* gridItem);
 
+	void arrangeChildren();
+
+	void applySpacing();
+
 	void updateAncestorListeners();
 	void clearAncestorListeners();
 };
@@ -113,10 +132,11 @@ class SnapLayoutPrivate : public QQuickLayoutPrivate {
 
 	void mirrorChange() override;
 
-	QQuickGridLayoutEngine engine;
+	SnapGridLayoutEngine engine;
 	SnapLayoutStyleInfo* styleInfo = nullptr;
 	Qt::Orientation orientation = Qt::Horizontal;
 	Qt::LayoutDirection layoutDirection = Qt::LeftToRight;
+	qreal spacingRequest = qQNaN();
 	bool rearranging = false;
 	int recurRearrangeCounter = 0;
 	QList<QQuickItem*> invalidateAfterRearrange;
@@ -124,6 +144,14 @@ class SnapLayoutPrivate : public QQuickLayoutPrivate {
 	QVector<QPointer<QQuickItem>> ancestorListeners;
 	qint64 originResidualX = -1;
 	qint64 originResidualY = -1;
+
+	struct ChildSize {
+		qint64 engineWidth = 0;
+		qint64 engineHeight = 0;
+		qint64 width = 0;
+		qint64 height = 0;
+	};
+	QHash<QQuickItem*, ChildSize> childSizes;
 };
 
 } // namespace ZShell::components