Merge "Correct comments in StackScrollAlgorithm" into tm-qpr-dev (b6128c6b) · Commits · e / os / android_frameworks_base

packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/StackScrollAlgorithm.java

+6 −9

Original line number	Diff line number	Diff line
		@@ -894,20 +894,19 @@ public class StackScrollAlgorithm {
		ExpandableViewState childViewState = child.getViewState();
		float baseZ = ambientState.getBaseZHeight();

		// Handles HUN shadow when Shade is opened

		if (child.mustStayOnScreen() && !childViewState.headsUpIsVisible
		&& !ambientState.isDozingAndNotPulsing(child)
		&& childViewState.getYTranslation() < ambientState.getTopPadding()
		+ ambientState.getStackTranslation()) {
		// Handles HUN shadow when Shade is opened, and AmbientState.mScrollY > 0
		// Calculate the HUN's z-value based on its overlapping fraction with QQS Panel.
		// When scrolling down shade to make HUN back to in-position in Notification Panel,
		// The over-lapping fraction goes to 0, and shadows hides gradually.

		if (childrenOnTop != 0.0f) {
		// To elevate the later HUN over previous HUN
		// To elevate the later HUN over previous HUN when multiple HUNs exist
		childrenOnTop++;
		} else {
		// Handles HUN shadow when Shade is opened, and AmbientState.mScrollY > 0
		// Calculate the HUN's z-value based on its overlapping fraction with QQS Panel.
		// When scrolling down shade to make HUN back to in-position in Notification Panel,
		// The overlapping fraction goes to 0, and shadows hides gradually.
		float overlap = ambientState.getTopPadding()
		+ ambientState.getStackTranslation() - childViewState.getYTranslation();
		// To prevent over-shadow during HUN entry
		@@ -915,7 +914,6 @@ public class StackScrollAlgorithm {
		1.0f,
		overlap / childViewState.height
		);
		MathUtils.saturate(childrenOnTop);
		}
		childViewState.setZTranslation(baseZ
		+ childrenOnTop * mPinnedZTranslationExtra);
		@@ -945,7 +943,6 @@ public class StackScrollAlgorithm {
		childViewState.setZTranslation(baseZ);
		}

		// Handles HUN shadow when shade is closed.
		// While HUN is showing and Shade is closed: headerVisibleAmount stays 0, shadow stays.
		// During HUN-to-Shade (eg. dragging down HUN to open Shade): headerVisibleAmount goes
		// gradually from 0 to 1, shadow hides gradually.