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Fix occasional Home/All Apps slowdowns

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Bug # 5581817

Change-Id: I0ee75ebe073325f89d89669b562ffc4db28f3004
This commit is contained in:
Michael Jurka
2011-11-09 20:24:03 -08:00
parent 929fff0e74
commit b9c76f3224
2 changed files with 47 additions and 16 deletions
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41
src/com/android/launcher2/PagedView.java
View File

@@ -123,6 +123,7 @@ public abstract class PagedView extends ViewGroup {
protected boolean mCenterPagesVertically;
protected boolean mAllowOverScroll = true;
protected int mUnboundedScrollX;
protected int[] mTempVisiblePagesRange = new int[2];
// parameter that adjusts the layout to be optimized for pages with that scale factor
protected float mLayoutScale = 1.0f;
@@ -671,20 +672,7 @@ public abstract class PagedView extends ViewGroup {
updateScrollingIndicator();
}
@Override
protected void dispatchDraw(Canvas canvas) {
int halfScreenSize = getMeasuredWidth() / 2;
int screenCenter = mScrollX + halfScreenSize;
if (screenCenter != mLastScreenCenter) {
screenScrolled(screenCenter);
updateAdjacentPagesAlpha();
mLastScreenCenter = screenCenter;
}
// Find out which screens are visible; as an optimization we only call draw on them
// As an optimization, this code assumes that all pages have the same width as the 0th
// page.
protected void getVisiblePages(int[] range) {
final int pageCount = getChildCount();
if (pageCount > 0) {
final int pageWidth = getScaledMeasuredWidth(getPageAt(0));
@@ -702,6 +690,31 @@ public abstract class PagedView extends ViewGroup {
x += getScaledMeasuredWidth(getPageAt(rightScreen)) + mPageSpacing;
}
rightScreen = Math.min(getChildCount() - 1, rightScreen);
range[0] = leftScreen;
range[1] = rightScreen;
} else {
range[0] = -1;
range[1] = -1;
}
}
@Override
protected void dispatchDraw(Canvas canvas) {
int halfScreenSize = getMeasuredWidth() / 2;
int screenCenter = mScrollX + halfScreenSize;
if (screenCenter != mLastScreenCenter) {
screenScrolled(screenCenter);
updateAdjacentPagesAlpha();
mLastScreenCenter = screenCenter;
}
// Find out which screens are visible; as an optimization we only call draw on them
final int pageCount = getChildCount();
if (pageCount > 0) {
getVisiblePages(mTempVisiblePagesRange);
final int leftScreen = mTempVisiblePagesRange[0];
final int rightScreen = mTempVisiblePagesRange[1];
final long drawingTime = getDrawingTime();
// Clip to the bounds

22
src/com/android/launcher2/Workspace.java
View File

@@ -1255,6 +1255,19 @@ public class Workspace extends SmoothPagedView
@Override
protected void dispatchDraw(Canvas canvas) {
if (mChildrenLayersEnabled) {
getVisiblePages(mTempVisiblePagesRange);
final int leftScreen = mTempVisiblePagesRange[0];
final int rightScreen = mTempVisiblePagesRange[1];
if (leftScreen != -1 && rightScreen != -1) {
// calling setChildrenLayersEnabled on a view that's not visible/rendered
// causes slowdowns on some graphics cards, so we set it here to be sure
// it's only called when it's safe (ie when the view will be rendered)
for (int i = leftScreen; i <= rightScreen; i++) {
((ViewGroup)getPageAt(i)).setChildrenLayersEnabled(true);
}
}
}
super.dispatchDraw(canvas);
if (mInScrollArea && !LauncherApplication.isScreenLarge()) {
@@ -1359,8 +1372,13 @@ public class Workspace extends SmoothPagedView
if (enableChildrenLayers != mChildrenLayersEnabled) {
mChildrenLayersEnabled = enableChildrenLayers;
for (int i = 0; i < getPageCount(); i++) {
((ViewGroup)getChildAt(i)).setChildrenLayersEnabled(enableChildrenLayers);
// calling setChildrenLayersEnabled on a view that's not visible/rendered
// causes slowdowns on some graphics cards, so we only disable it here and leave
// the enabling to dispatchDraw
if (!enableChildrenLayers) {
for (int i = 0; i < getPageCount(); i++) {
((ViewGroup)getChildAt(i)).setChildrenLayersEnabled(false);
}
}
}
}