fix: graph jitter on load + format

Plugins/ZShell/Components/sparklinecontent.hpp

@@ -31,20 +31,15 @@ class SparklineContent : public QQuickPaintedItem {
 
 	void setViewportSize(qreal viewportWidth, qreal viewportHeight);
 
-	// How often a new sample arrives, in milliseconds. With this set the slide
-	// phase is read from the sample clock rather than from `progress`, which
-	// makes the wrap exact; without it the phase is the value QML supplies.
 	void setSlideInterval(qreal intervalMs);
 
-	// Offsets the item for the slide. Kept here rather than in SparklineItem
-	// because the quantization needs both stepX() and the window's dpr.
 	void setSlideProgress(qreal progress);
 
 	[[nodiscard]] qreal stepX() const;
 
+	[[nodiscard]] bool slideActive() const;
+
 	protected:
-	// The stroke width, sample spacing and plot bounds are quantized in device
-	// pixels, so they have to be built with the ratio the window actually has.
 	void itemChange(ItemChange change, const ItemChangeData& value) override;
 
 	private:
@@ -78,13 +73,9 @@ class SparklineContent : public QQuickPaintedItem {
 
 	qreal m_viewportW = 0.0;
 	qreal m_viewportH = 0.0;
-	// The height actually painted, snapped so the texture maps 1:1 onto device
-	// rows. The plot bounds are built from this, not from the slot's height.
 	qreal m_paintedH = 0.0;
 	qreal m_dpr = 1.0;
 	qreal m_slideIntervalMs = 0.0;
-	// Restarted whenever a sample arrives, so the slide phase follows the sample
-	// cadence instead of the animation's timeline.
 	QElapsedTimer m_sampleClock;
 
 	LineGeometry m_geom1;