List of usage examples for android.view View onFinishTemporaryDetach
public void onFinishTemporaryDetach()
From source file:com.example.libwidgettv.bak.AbsListView.java
/** * Get a view and have it show the data associated with the specified * position. This is called when we have already discovered that the view is * not available for reuse in the recycle bin. The only choices left are * converting an old view or making a new one. * /* w w w . j a v a 2 s. c o m*/ * @param position * The position to display * @param isScrap * Array of at least 1 boolean, the first entry will become true * if the returned view was taken from the scrap heap, false if * otherwise. * * @return A view displaying the data associated with the specified position */ View obtainView(int position, boolean[] isScrap) { isScrap[0] = false; View scrapView; scrapView = mRecycler.getScrapView(position); View child; if (scrapView != null) { if (ViewDebug.TRACE_RECYCLER) { ViewDebug.trace(scrapView, ViewDebug.RecyclerTraceType.RECYCLE_FROM_SCRAP_HEAP, position, -1); } child = mAdapter.getView(position, scrapView, this); if (ViewDebug.TRACE_RECYCLER) { ViewDebug.trace(child, ViewDebug.RecyclerTraceType.BIND_VIEW, position, getChildCount()); } if (child != scrapView) { mRecycler.addScrapView(scrapView, position); if (mCacheColorHint != 0) { child.setDrawingCacheBackgroundColor(mCacheColorHint); } if (ViewDebug.TRACE_RECYCLER) { ViewDebug.trace(scrapView, ViewDebug.RecyclerTraceType.MOVE_TO_SCRAP_HEAP, position, -1); } } else { isScrap[0] = true; // child.dispatchFinishTemporaryDetach(); child.onFinishTemporaryDetach(); } } else { child = mAdapter.getView(position, null, this); if (mCacheColorHint != 0) { child.setDrawingCacheBackgroundColor(mCacheColorHint); } if (ViewDebug.TRACE_RECYCLER) { ViewDebug.trace(child, ViewDebug.RecyclerTraceType.NEW_VIEW, position, getChildCount()); } } return child; }
From source file:com.huewu.pla.lib.internal.PLAListView.java
@SuppressWarnings("deprecation") @Override/*from w ww .java 2 s . c o m*/ protected void layoutChildren() { final boolean blockLayoutRequests = mBlockLayoutRequests; if (!blockLayoutRequests) { mBlockLayoutRequests = true; } else return; try { super.layoutChildren(); invalidate(); if (mAdapter == null) { resetList(); invokeOnItemScrollListener(); return; } final int childrenTop = mListPadding.top; // int childrenBottom = mBottom - mTop - mListPadding.bottom; final int childrenBottom = getBottom() - getTop() - mListPadding.bottom; final int childCount = getChildCount(); final int index = 0; View oldFirst = null; View focusLayoutRestoreView = null; // Remember stuff we will need down below switch (mLayoutMode) { case LAYOUT_FORCE_TOP: case LAYOUT_FORCE_BOTTOM: case LAYOUT_SPECIFIC: case LAYOUT_SYNC: break; default: // Remember the previous first child oldFirst = getChildAt(0); } final boolean dataChanged = mDataChanged; if (dataChanged) { handleDataChangedPLA(); } // Handle the empty set by removing all views that are visible // and calling it a day if (mItemCount == 0) { resetList(); invokeOnItemScrollListener(); return; } else if (mItemCount != mAdapter.getCount()) throw new IllegalStateException("The content of the adapter has changed but " + "ListView did not receive a notification. Make sure the content of " + "your adapter is not modified from a background thread, but only " + "from the UI thread. [in ListView(" + getId() + ", " + getClass() + ") with Adapter(" + mAdapter.getClass() + ")]"); // Pull all children into the RecycleBin. // These views will be reused if possible final int firstPosition = mFirstPosition; final RecycleBin recycleBin = mRecycler; // reset the focus restoration // Don't put header or footer views into the Recycler. Those are // already cached in mHeaderViews; if (dataChanged) { for (int i = 0; i < childCount; i++) { recycleBin.addScrapView(getChildAt(i)); if (ViewDebug.TRACE_RECYCLER) { ViewDebug.trace(getChildAt(i), ViewDebug.RecyclerTraceType.MOVE_TO_SCRAP_HEAP, index, i); } } } else { recycleBin.fillActiveViews(childCount, firstPosition); } // take focus back to us temporarily to avoid the eventual // call to clear focus when removing the focused child below // from messing things up when ViewRoot assigns focus back // to someone else final View focusedChild = getFocusedChild(); if (focusedChild != null) { // TODO: in some cases focusedChild.getParent() == null // we can remember the focused view to restore after relayout if // the // data hasn't changed, or if the focused position is a header // or footer if (!dataChanged || isDirectChildHeaderOrFooter(focusedChild)) { // remember the specific view that had focus focusLayoutRestoreView = findFocus(); if (focusLayoutRestoreView != null) { // tell it we are going to mess with it focusLayoutRestoreView.onStartTemporaryDetach(); } } requestFocus(); } switch (mLayoutMode) { case LAYOUT_SYNC: onLayoutSync(mSyncPosition); // Clear out old views detachAllViewsFromParent(); fillSpecific(mSyncPosition, mSpecificTop); onLayoutSyncFinished(mSyncPosition); break; case LAYOUT_FORCE_BOTTOM: detachAllViewsFromParent(); fillUp(mItemCount - 1, childrenBottom); adjustViewsUpOrDown(); break; case LAYOUT_FORCE_TOP: detachAllViewsFromParent(); mFirstPosition = 0; fillFromTop(childrenTop); adjustViewsUpOrDown(); break; default: if (childCount == 0) { detachAllViewsFromParent(); if (!mStackFromBottom) { fillFromTop(childrenTop); } else { fillUp(mItemCount - 1, childrenBottom); } } else { if (mFirstPosition < mItemCount) { onLayoutSync(mFirstPosition); detachAllViewsFromParent(); fillSpecific(mFirstPosition, oldFirst == null ? childrenTop : oldFirst.getTop()); onLayoutSyncFinished(mFirstPosition); } else { onLayoutSync(0); detachAllViewsFromParent(); fillSpecific(0, childrenTop); onLayoutSyncFinished(0); } } break; } // Flush any cached views that did not get reused above recycleBin.scrapActiveViews(); if (mTouchMode > TOUCH_MODE_DOWN && mTouchMode < TOUCH_MODE_SCROLL) { final View child = getChildAt(mMotionPosition - mFirstPosition); if (child != null) { positionSelector(child); } } else { mSelectedTop = 0; mSelectorRect.setEmpty(); } // even if there is not selected position, we may need to restore // focus (i.e. something focusable in touch mode) if (hasFocus() && focusLayoutRestoreView != null) { focusLayoutRestoreView.requestFocus(); } // tell focus view we are done mucking with it, if it is still in // our view hierarchy. if (focusLayoutRestoreView != null && focusLayoutRestoreView.getWindowToken() != null) { focusLayoutRestoreView.onFinishTemporaryDetach(); } mLayoutMode = LAYOUT_NORMAL; mDataChanged = false; mNeedSync = false; invokeOnItemScrollListener(); } finally { if (!blockLayoutRequests) { mBlockLayoutRequests = false; } } }
From source file:com.huewu.pla.lib.internal.PLA_ListView.java
@SuppressWarnings("deprecation") @Override//from w w w .j a v a 2 s. c o m protected void layoutChildren() { final boolean blockLayoutRequests = mBlockLayoutRequests; if (!blockLayoutRequests) { mBlockLayoutRequests = true; } else { return; } try { super.layoutChildren(); invalidate(); if (mAdapter == null) { resetList(); invokeOnItemScrollListener(); return; } int childrenTop = mListPadding.top; // int childrenBottom = mBottom - mTop - mListPadding.bottom; int childrenBottom = getBottom() - getTop() - mListPadding.bottom; int childCount = getChildCount(); int index = 0; View oldFirst = null; View focusLayoutRestoreView = null; // Remember stuff we will need down below switch (mLayoutMode) { case LAYOUT_FORCE_TOP: case LAYOUT_FORCE_BOTTOM: case LAYOUT_SPECIFIC: case LAYOUT_SYNC: break; default: // Remember the previous first child oldFirst = getChildAt(0); } boolean dataChanged = mDataChanged; if (dataChanged) { handleDataChanged(); } // Handle the empty set by removing all views that are visible // and calling it a day if (mItemCount == 0) { resetList(); invokeOnItemScrollListener(); return; } else if (mItemCount != mAdapter.getCount()) { throw new IllegalStateException("The content of the adapter has changed but " + "ListView did not receive a notification. Make sure the content of " + "your adapter is not modified from a background thread, but only " + "from the UI thread. [in ListView(" + getId() + ", " + getClass() + ") with Adapter(" + mAdapter.getClass() + ")]"); } // Pull all children into the RecycleBin. // These views will be reused if possible final int firstPosition = mFirstPosition; final RecycleBin recycleBin = mRecycler; // reset the focus restoration // Don't put header or footer views into the Recycler. Those are // already cached in mHeaderViews; if (dataChanged) { for (int i = 0; i < childCount; i++) { recycleBin.addScrapView(getChildAt(i)); if (ViewDebug.TRACE_RECYCLER) { ViewDebug.trace(getChildAt(i), ViewDebug.RecyclerTraceType.MOVE_TO_SCRAP_HEAP, index, i); } } } else { recycleBin.fillActiveViews(childCount, firstPosition); } // take focus back to us temporarily to avoid the eventual // call to clear focus when removing the focused child below // from messing things up when ViewRoot assigns focus back // to someone else final View focusedChild = getFocusedChild(); if (focusedChild != null) { // TODO: in some cases focusedChild.getParent() == null // we can remember the focused view to restore after relayout if // the // data hasn't changed, or if the focused position is a header // or footer if (!dataChanged || isDirectChildHeaderOrFooter(focusedChild)) { // remember the specific view that had focus focusLayoutRestoreView = findFocus(); if (focusLayoutRestoreView != null) { // tell it we are going to mess with it focusLayoutRestoreView.onStartTemporaryDetach(); } } requestFocus(); } switch (mLayoutMode) { case LAYOUT_SYNC: onLayoutSync(mSyncPosition); // Clear out old views detachAllViewsFromParent(); fillSpecific(mSyncPosition, mSpecificTop); onLayoutSyncFinished(mSyncPosition); break; case LAYOUT_FORCE_BOTTOM: detachAllViewsFromParent(); fillUp(mItemCount - 1, childrenBottom); adjustViewsUpOrDown(); break; case LAYOUT_FORCE_TOP: detachAllViewsFromParent(); mFirstPosition = 0; fillFromTop(childrenTop); adjustViewsUpOrDown(); break; default: if (childCount == 0) { detachAllViewsFromParent(); if (!mStackFromBottom) { fillFromTop(childrenTop); } else { fillUp(mItemCount - 1, childrenBottom); } } else { if (mFirstPosition < mItemCount) { onLayoutSync(mFirstPosition); detachAllViewsFromParent(); fillSpecific(mFirstPosition, oldFirst == null ? childrenTop : oldFirst.getTop()); onLayoutSyncFinished(mFirstPosition); } else { onLayoutSync(0); detachAllViewsFromParent(); fillSpecific(0, childrenTop); onLayoutSyncFinished(0); } } break; } // Flush any cached views that did not get reused above recycleBin.scrapActiveViews(); if (mTouchMode > TOUCH_MODE_DOWN && mTouchMode < TOUCH_MODE_SCROLL) { View child = getChildAt(mMotionPosition - mFirstPosition); if (child != null) positionSelector(child); } else { mSelectedTop = 0; mSelectorRect.setEmpty(); } // even if there is not selected position, we may need to restore // focus (i.e. something focusable in touch mode) if (hasFocus() && focusLayoutRestoreView != null) { focusLayoutRestoreView.requestFocus(); } // tell focus view we are done mucking with it, if it is still in // our view hierarchy. if (focusLayoutRestoreView != null && focusLayoutRestoreView.getWindowToken() != null) { focusLayoutRestoreView.onFinishTemporaryDetach(); } mLayoutMode = LAYOUT_NORMAL; mDataChanged = false; mNeedSync = false; invokeOnItemScrollListener(); } finally { if (!blockLayoutRequests) { mBlockLayoutRequests = false; } } }
From source file:org.bangbang.support.v4.widget.HListView.java
@Override
protected void layoutChildren() {
final boolean blockLayoutRequests = mBlockLayoutRequests;
if (!blockLayoutRequests) {
mBlockLayoutRequests = true;
} else {/*from w w w. j av a2s .co m*/
return;
}
try {
super.layoutChildren();
invalidate();
if (mAdapter == null) {
resetList();
invokeOnItemScrollListener();
return;
}
int childrenLeft = mListPadding.left;
int childrenRight = getRight() - getLeft() - mListPadding.right;
int childCount = getChildCount();
int index;
int delta = 0;
View sel;
View oldSel = null;
View oldFirst = null;
View newSel = null;
View focusLayoutRestoreView = null;
// Remember stuff we will need down below
switch (mLayoutMode) {
case LAYOUT_SET_SELECTION:
index = mNextSelectedPosition - mFirstPosition;
if (index >= 0 && index < childCount) {
newSel = getChildAt(index);
}
break;
case LAYOUT_FORCE_TOP:
case LAYOUT_FORCE_BOTTOM:
case LAYOUT_SPECIFIC:
case LAYOUT_SYNC:
break;
case LAYOUT_MOVE_SELECTION:
default:
// Remember the previously selected view
index = mSelectedPosition - mFirstPosition;
if (index >= 0 && index < childCount) {
oldSel = getChildAt(index);
}
// Remember the previous first child
oldFirst = getChildAt(0);
if (mNextSelectedPosition >= 0) {
delta = mNextSelectedPosition - mSelectedPosition;
}
// Caution: newSel might be null
newSel = getChildAt(index + delta);
}
boolean dataChanged = mDataChanged;
if (dataChanged) {
handleDataChanged();
}
// Handle the empty set by removing all views that are visible
// and calling it a day
if (mItemCount == 0) {
resetList();
invokeOnItemScrollListener();
return;
} else if (mItemCount != mAdapter.getCount()) {
throw new IllegalStateException("The content of the adapter has changed but "
+ "ListView did not receive a notification. Make sure the content of "
+ "your adapter is not modified from a background thread, but only "
+ "from the UI thread.");
}
setSelectedPositionInt(mNextSelectedPosition);
// Pull all children into the RecycleBin.
// These views will be reused if possible
final int firstPosition = mFirstPosition;
final RecycleBin recycleBin = mRecycler;
// reset the focus restoration
View focusLayoutRestoreDirectChild = null;
// Don't put header or footer views into the Recycler. Those are
// already cached in mHeaderViews;
if (dataChanged) {
for (int i = 0; i < childCount; i++) {
recycleBin.addScrapView(getChildAt(i));
if (ViewDebug.TRACE_RECYCLER) {
ViewDebug.trace(getChildAt(i), ViewDebug.RecyclerTraceType.MOVE_TO_SCRAP_HEAP, index, i);
}
}
} else {
recycleBin.fillActiveViews(childCount, firstPosition);
}
// take focus back to us temporarily to avoid the eventual
// call to clear focus when removing the focused child below
// from messing things up when ViewRoot assigns focus back
// to someone else
final View focusedChild = getFocusedChild();
if (focusedChild != null) {
// TODO: in some cases focusedChild.getParent() == null
// we can remember the focused view to restore after relayout if the
// data hasn't changed, or if the focused position is a header or footer
if (!dataChanged || isDirectChildHeaderOrFooter(focusedChild)) {
focusLayoutRestoreDirectChild = focusedChild;
// remember the specific view that had focus
focusLayoutRestoreView = findFocus();
if (focusLayoutRestoreView != null) {
// tell it we are going to mess with it
focusLayoutRestoreView.onStartTemporaryDetach();
}
}
requestFocus();
}
// Clear out old views
//removeAllViewsInLayout();
detachAllViewsFromParent();
switch (mLayoutMode) {
case LAYOUT_SET_SELECTION:
if (newSel != null) {
sel = fillFromSelection(newSel.getLeft(), childrenLeft, childrenRight);
} else {
sel = fillFromMiddle(childrenLeft, childrenRight);
}
break;
case LAYOUT_SYNC:
sel = fillSpecific(mSyncPosition, mSpecificTop);
break;
case LAYOUT_FORCE_BOTTOM:
sel = fillUp(mItemCount - 1, childrenRight);
adjustViewsUpOrDown();
break;
case LAYOUT_FORCE_TOP:
mFirstPosition = 0;
sel = fillFromTop(childrenLeft);
adjustViewsUpOrDown();
break;
case LAYOUT_SPECIFIC:
sel = fillSpecific(reconcileSelectedPosition(), mSpecificLeft);
break;
case LAYOUT_MOVE_SELECTION:
sel = moveSelection(oldSel, newSel, delta, childrenLeft, childrenRight);
break;
default:
if (childCount == 0) {
if (!mStackFromBottom) {
final int position = lookForSelectablePosition(0, true);
setSelectedPositionInt(position);
sel = fillFromTop(childrenLeft);
} else {
final int position = lookForSelectablePosition(mItemCount - 1, false);
setSelectedPositionInt(position);
sel = fillUp(mItemCount - 1, childrenRight);
}
} else {
if (mSelectedPosition >= 0 && mSelectedPosition < mItemCount) {
sel = fillSpecific(mSelectedPosition, oldSel == null ? childrenLeft : oldSel.getLeft());
} else if (mFirstPosition < mItemCount) {
sel = fillSpecific(mFirstPosition, oldFirst == null ? childrenLeft : oldFirst.getLeft());
} else {
sel = fillSpecific(0, childrenLeft);
}
}
break;
}
// Flush any cached views that did not get reused above
recycleBin.scrapActiveViews();
if (sel != null) {
// the current selected item should get focus if items
// are focusable
if (mItemsCanFocus && hasFocus() && !sel.hasFocus()) {
final boolean focusWasTaken = (sel == focusLayoutRestoreDirectChild
&& focusLayoutRestoreView.requestFocus()) || sel.requestFocus();
if (!focusWasTaken) {
// selected item didn't take focus, fine, but still want
// to make sure something else outside of the selected view
// has focus
final View focused = getFocusedChild();
if (focused != null) {
focused.clearFocus();
}
positionSelector(sel);
} else {
sel.setSelected(false);
mSelectorRect.setEmpty();
}
} else {
positionSelector(sel);
}
mSelectedTop = sel.getTop();
} else {
mSelectedTop = 0;
mSelectorRect.setEmpty();
// even if there is not selected position, we may need to restore
// focus (i.e. something focusable in touch mode)
if (hasFocus() && focusLayoutRestoreView != null) {
focusLayoutRestoreView.requestFocus();
}
}
// tell focus view we are done mucking with it, if it is still in
// our view hierarchy.
if (focusLayoutRestoreView != null && focusLayoutRestoreView.getWindowToken() != null) {
focusLayoutRestoreView.onFinishTemporaryDetach();
}
mLayoutMode = LAYOUT_NORMAL;
mDataChanged = false;
mNeedSync = false;
setNextSelectedPositionInt(mSelectedPosition);
updateScrollIndicators();
if (mItemCount > 0) {
checkSelectionChanged();
}
invokeOnItemScrollListener();
} finally {
if (!blockLayoutRequests) {
mBlockLayoutRequests = false;
}
}
}
From source file:com.awrtechnologies.valor.valorfireplace.hlistview.widget.HListView.java
@Override protected void layoutChildren() { final boolean blockLayoutRequests = mBlockLayoutRequests; if (!blockLayoutRequests) { mBlockLayoutRequests = true;//from ww w .ja v a 2 s .c o m } else { return; } try { super.layoutChildren(); invalidate(); if (mAdapter == null) { resetList(); invokeOnItemScrollListener(); return; } int childrenLeft = mListPadding.left; int childrenRight = getRight() - getLeft() - mListPadding.right; int childCount = getChildCount(); int index = 0; int delta = 0; View sel; View oldSel = null; View oldFirst = null; View newSel = null; View focusLayoutRestoreView = null; // AccessibilityNodeInfo accessibilityFocusLayoutRestoreNode = null; // View accessibilityFocusLayoutRestoreView = null; // int accessibilityFocusPosition = INVALID_POSITION; // Remember stuff we will need down below switch (mLayoutMode) { case LAYOUT_SET_SELECTION: index = mNextSelectedPosition - mFirstPosition; if (index >= 0 && index < childCount) { newSel = getChildAt(index); } break; case LAYOUT_FORCE_LEFT: case LAYOUT_FORCE_RIGHT: case LAYOUT_SPECIFIC: case LAYOUT_SYNC: break; case LAYOUT_MOVE_SELECTION: default: // Remember the previously selected view index = mSelectedPosition - mFirstPosition; if (index >= 0 && index < childCount) { oldSel = getChildAt(index); } // Remember the previous first child oldFirst = getChildAt(0); if (mNextSelectedPosition >= 0) { delta = mNextSelectedPosition - mSelectedPosition; } // Caution: newSel might be null newSel = getChildAt(index + delta); } boolean dataChanged = mDataChanged; if (dataChanged) { handleDataChanged(); } // Handle the empty set by removing all views that are visible // and calling it a day if (mItemCount == 0) { resetList(); invokeOnItemScrollListener(); return; } else if (mItemCount != mAdapter.getCount()) { throw new IllegalStateException("The content of the adapter has changed but " + "ListView did not receive a notification. Make sure the content of " + "your adapter is not modified from a background thread, but only " + "from the UI thread. [in ListView(" + getId() + ", " + getClass() + ") with Adapter(" + mAdapter.getClass() + ")]"); } setSelectedPositionInt(mNextSelectedPosition); // Pull all children into the RecycleBin. // These views will be reused if possible final int firstPosition = mFirstPosition; final RecycleBin recycleBin = mRecycler; // reset the focus restoration View focusLayoutRestoreDirectChild = null; // Don't put header or footer views into the Recycler. Those are // already cached in mHeaderViews; if (dataChanged) { for (int i = 0; i < childCount; i++) { recycleBin.addScrapView(getChildAt(i), firstPosition + i); } } else { recycleBin.fillActiveViews(childCount, firstPosition); } // take focus back to us temporarily to avoid the eventual // call to clear focus when removing the focused child below // from messing things up when ViewAncestor assigns focus back // to someone else final View focusedChild = getFocusedChild(); if (focusedChild != null) { // TODO: in some cases focusedChild.getParent() == null // we can remember the focused view to restore after relayout if the // data hasn't changed, or if the focused position is a header or footer if (!dataChanged || isDirectChildHeaderOrFooter(focusedChild)) { focusLayoutRestoreDirectChild = focusedChild; // remember the specific view that had focus focusLayoutRestoreView = findFocus(); if (focusLayoutRestoreView != null) { // tell it we are going to mess with it focusLayoutRestoreView.onStartTemporaryDetach(); } } requestFocus(); } /* * // Remember which child, if any, had accessibility focus. final ViewRootImpl viewRootImpl = getViewRootImpl(); if ( * viewRootImpl != null ) { final View accessFocusedView = viewRootImpl.getAccessibilityFocusedHost(); if ( * accessFocusedView != null ) { final View accessFocusedChild = findAccessibilityFocusedChild( accessFocusedView ); if ( * accessFocusedChild != null ) { if ( !dataChanged || isDirectChildHeaderOrFooter( accessFocusedChild ) ) { // If the * views won't be changing, try to maintain // focus on the current view host and (if // applicable) its virtual view. * accessibilityFocusLayoutRestoreView = accessFocusedView; accessibilityFocusLayoutRestoreNode = viewRootImpl * .getAccessibilityFocusedVirtualView(); } else { // Otherwise, try to maintain focus at the same // position. * accessibilityFocusPosition = getPositionForView( accessFocusedChild ); } } } } */ // Clear out old views detachAllViewsFromParent(); recycleBin.removeSkippedScrap(); switch (mLayoutMode) { case LAYOUT_SET_SELECTION: if (newSel != null) { sel = fillFromSelection(newSel.getLeft(), childrenLeft, childrenRight); } else { sel = fillFromMiddle(childrenLeft, childrenRight); } break; case LAYOUT_SYNC: sel = fillSpecific(mSyncPosition, mSpecificLeft); break; case LAYOUT_FORCE_RIGHT: sel = fillLeft(mItemCount - 1, childrenRight); adjustViewsLeftOrRight(); break; case LAYOUT_FORCE_LEFT: mFirstPosition = 0; sel = fillFromLeft(childrenLeft); adjustViewsLeftOrRight(); break; case LAYOUT_SPECIFIC: sel = fillSpecific(reconcileSelectedPosition(), mSpecificLeft); break; case LAYOUT_MOVE_SELECTION: sel = moveSelection(oldSel, newSel, delta, childrenLeft, childrenRight); break; default: if (childCount == 0) { if (!mStackFromRight) { final int position = lookForSelectablePosition(0, true); setSelectedPositionInt(position); sel = fillFromLeft(childrenLeft); } else { final int position = lookForSelectablePosition(mItemCount - 1, false); setSelectedPositionInt(position); sel = fillLeft(mItemCount - 1, childrenRight); } } else { if (mSelectedPosition >= 0 && mSelectedPosition < mItemCount) { sel = fillSpecific(mSelectedPosition, oldSel == null ? childrenLeft : oldSel.getLeft()); } else if (mFirstPosition < mItemCount) { sel = fillSpecific(mFirstPosition, oldFirst == null ? childrenLeft : oldFirst.getLeft()); } else { sel = fillSpecific(0, childrenLeft); } } break; } // Flush any cached views that did not get reused above recycleBin.scrapActiveViews(); if (sel != null) { // the current selected item should get focus if items // are focusable if (mItemsCanFocus && hasFocus() && !sel.hasFocus()) { final boolean focusWasTaken = (sel == focusLayoutRestoreDirectChild && focusLayoutRestoreView != null && focusLayoutRestoreView.requestFocus()) || sel.requestFocus(); if (!focusWasTaken) { // selected item didn't take focus, fine, but still want // to make sure something else outside of the selected view // has focus final View focused = getFocusedChild(); if (focused != null) { focused.clearFocus(); } positionSelector(INVALID_POSITION, sel); } else { sel.setSelected(false); mSelectorRect.setEmpty(); } } else { positionSelector(INVALID_POSITION, sel); } mSelectedLeft = sel.getLeft(); } else { if (mTouchMode > TOUCH_MODE_DOWN && mTouchMode < TOUCH_MODE_SCROLL) { View child = getChildAt(mMotionPosition - mFirstPosition); if (child != null) positionSelector(mMotionPosition, child); } else { mSelectedLeft = 0; mSelectorRect.setEmpty(); } // even if there is not selected position, we may need to restore // focus (i.e. something focusable in touch mode) if (hasFocus() && focusLayoutRestoreView != null) { focusLayoutRestoreView.requestFocus(); } } // Attempt to restore accessibility focus. // if ( accessibilityFocusLayoutRestoreNode != null ) { // accessibilityFocusLayoutRestoreNode.performAction(AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS ); // } else if ( accessibilityFocusLayoutRestoreView != null ) { // this method is marked as hidden. Shame on you google! // accessibilityFocusLayoutRestoreView.requestAccessibilityFocus(); // } else if ( accessibilityFocusPosition != INVALID_POSITION ) { // Bound the position within the visible children. // final int position = MathUtils.constrain( ( accessibilityFocusPosition - mFirstPosition ), 0, ( getChildCount() - 1 ) ); // final View restoreView = getChildAt( position ); // if ( restoreView != null ) { // this method is marked as hidden. Shame on you google! // restoreView.requestAccessibilityFocus(); // } // } // tell focus view we are done mucking with it, if it is still in // our view hierarchy. if (focusLayoutRestoreView != null && focusLayoutRestoreView.getWindowToken() != null) { focusLayoutRestoreView.onFinishTemporaryDetach(); } mLayoutMode = LAYOUT_NORMAL; mDataChanged = false; if (mPositionScrollAfterLayout != null) { post(mPositionScrollAfterLayout); mPositionScrollAfterLayout = null; } mNeedSync = false; setNextSelectedPositionInt(mSelectedPosition); updateScrollIndicators(); if (mItemCount > 0) { checkSelectionChanged(); } invokeOnItemScrollListener(); } finally { if (!blockLayoutRequests) { mBlockLayoutRequests = false; } } }
From source file:com.awrtechnologies.carbudgetsales.hlistview.widget.HListView.java
@Override protected void layoutChildren() { final boolean blockLayoutRequests = mBlockLayoutRequests; if (!blockLayoutRequests) { mBlockLayoutRequests = true;//w ww . j a va2s . c o m } else { return; } try { super.layoutChildren(); invalidate(); if (mAdapter == null) { resetList(); invokeOnItemScrollListener(); return; } int childrenLeft = mListPadding.left; int childrenRight = getRight() - getLeft() - mListPadding.right; int childCount = getChildCount(); int index = 0; int delta = 0; View sel; View oldSel = null; View oldFirst = null; View newSel = null; View focusLayoutRestoreView = null; // AccessibilityNodeInfo accessibilityFocusLayoutRestoreNode = null; // View accessibilityFocusLayoutRestoreView = null; // int accessibilityFocusPosition = INVALID_POSITION; // Remember stuff we will need down below switch (mLayoutMode) { case LAYOUT_SET_SELECTION: index = mNextSelectedPosition - mFirstPosition; if (index >= 0 && index < childCount) { newSel = getChildAt(index); } break; case LAYOUT_FORCE_LEFT: case LAYOUT_FORCE_RIGHT: case LAYOUT_SPECIFIC: case LAYOUT_SYNC: break; case LAYOUT_MOVE_SELECTION: default: // Remember the previously selected view index = mSelectedPosition - mFirstPosition; if (index >= 0 && index < childCount) { oldSel = getChildAt(index); } // Remember the previous first child oldFirst = getChildAt(0); if (mNextSelectedPosition >= 0) { delta = mNextSelectedPosition - mSelectedPosition; } // Caution: newSel might be null newSel = getChildAt(index + delta); } boolean dataChanged = mDataChanged; if (dataChanged) { handleDataChanged(); } // Handle the empty set by removing all views that are visible // and calling it a day if (mItemCount == 0) { resetList(); invokeOnItemScrollListener(); return; } else if (mItemCount != mAdapter.getCount()) { throw new IllegalStateException( "The content of the com.awrtechnologies.carbudgetsales.adapter has changed but " + "ListView did not receive a notification. Make sure the content of " + "your com.awrtechnologies.carbudgetsales.adapter is not modified from a background thread, but only " + "from the UI thread. [in ListView(" + getId() + ", " + getClass() + ") with Adapter(" + mAdapter.getClass() + ")]"); } setSelectedPositionInt(mNextSelectedPosition); // Pull all children into the RecycleBin. // These views will be reused if possible final int firstPosition = mFirstPosition; final RecycleBin recycleBin = mRecycler; // reset the focus restoration View focusLayoutRestoreDirectChild = null; // Don't put header or footer views into the Recycler. Those are // already cached in mHeaderViews; if (dataChanged) { for (int i = 0; i < childCount; i++) { recycleBin.addScrapView(getChildAt(i), firstPosition + i); } } else { recycleBin.fillActiveViews(childCount, firstPosition); } // take focus back to us temporarily to avoid the eventual // call to clear focus when removing the focused child below // from messing things up when ViewAncestor assigns focus back // to someone else final View focusedChild = getFocusedChild(); if (focusedChild != null) { // TODO: in some cases focusedChild.getParent() == null // we can remember the focused view to restore after relayout if the // com.awrtechnologies.carbudgetsales.data hasn't changed, or if the focused position is a header or footer if (!dataChanged || isDirectChildHeaderOrFooter(focusedChild)) { focusLayoutRestoreDirectChild = focusedChild; // remember the specific view that had focus focusLayoutRestoreView = findFocus(); if (focusLayoutRestoreView != null) { // tell it we are going to mess with it focusLayoutRestoreView.onStartTemporaryDetach(); } } requestFocus(); } /* * // Remember which child, if any, had accessibility focus. final ViewRootImpl viewRootImpl = getViewRootImpl(); if ( * viewRootImpl != null ) { final View accessFocusedView = viewRootImpl.getAccessibilityFocusedHost(); if ( * accessFocusedView != null ) { final View accessFocusedChild = findAccessibilityFocusedChild( accessFocusedView ); if ( * accessFocusedChild != null ) { if ( !dataChanged || isDirectChildHeaderOrFooter( accessFocusedChild ) ) { // If the * views won't be changing, try to maintain // focus on the current view host and (if // applicable) its virtual view. * accessibilityFocusLayoutRestoreView = accessFocusedView; accessibilityFocusLayoutRestoreNode = viewRootImpl * .getAccessibilityFocusedVirtualView(); } else { // Otherwise, try to maintain focus at the same // position. * accessibilityFocusPosition = getPositionForView( accessFocusedChild ); } } } } */ // Clear out old views detachAllViewsFromParent(); recycleBin.removeSkippedScrap(); switch (mLayoutMode) { case LAYOUT_SET_SELECTION: if (newSel != null) { sel = fillFromSelection(newSel.getLeft(), childrenLeft, childrenRight); } else { sel = fillFromMiddle(childrenLeft, childrenRight); } break; case LAYOUT_SYNC: sel = fillSpecific(mSyncPosition, mSpecificLeft); break; case LAYOUT_FORCE_RIGHT: sel = fillLeft(mItemCount - 1, childrenRight); adjustViewsLeftOrRight(); break; case LAYOUT_FORCE_LEFT: mFirstPosition = 0; sel = fillFromLeft(childrenLeft); adjustViewsLeftOrRight(); break; case LAYOUT_SPECIFIC: sel = fillSpecific(reconcileSelectedPosition(), mSpecificLeft); break; case LAYOUT_MOVE_SELECTION: sel = moveSelection(oldSel, newSel, delta, childrenLeft, childrenRight); break; default: if (childCount == 0) { if (!mStackFromRight) { final int position = lookForSelectablePosition(0, true); setSelectedPositionInt(position); sel = fillFromLeft(childrenLeft); } else { final int position = lookForSelectablePosition(mItemCount - 1, false); setSelectedPositionInt(position); sel = fillLeft(mItemCount - 1, childrenRight); } } else { if (mSelectedPosition >= 0 && mSelectedPosition < mItemCount) { sel = fillSpecific(mSelectedPosition, oldSel == null ? childrenLeft : oldSel.getLeft()); } else if (mFirstPosition < mItemCount) { sel = fillSpecific(mFirstPosition, oldFirst == null ? childrenLeft : oldFirst.getLeft()); } else { sel = fillSpecific(0, childrenLeft); } } break; } // Flush any cached views that did not get reused above recycleBin.scrapActiveViews(); if (sel != null) { // the current selected item should get focus if items // are focusable if (mItemsCanFocus && hasFocus() && !sel.hasFocus()) { final boolean focusWasTaken = (sel == focusLayoutRestoreDirectChild && focusLayoutRestoreView != null && focusLayoutRestoreView.requestFocus()) || sel.requestFocus(); if (!focusWasTaken) { // selected item didn't take focus, fine, but still want // to make sure something else outside of the selected view // has focus final View focused = getFocusedChild(); if (focused != null) { focused.clearFocus(); } positionSelector(INVALID_POSITION, sel); } else { sel.setSelected(false); mSelectorRect.setEmpty(); } } else { positionSelector(INVALID_POSITION, sel); } mSelectedLeft = sel.getLeft(); } else { if (mTouchMode > TOUCH_MODE_DOWN && mTouchMode < TOUCH_MODE_SCROLL) { View child = getChildAt(mMotionPosition - mFirstPosition); if (child != null) positionSelector(mMotionPosition, child); } else { mSelectedLeft = 0; mSelectorRect.setEmpty(); } // even if there is not selected position, we may need to restore // focus (i.e. something focusable in touch mode) if (hasFocus() && focusLayoutRestoreView != null) { focusLayoutRestoreView.requestFocus(); } } // Attempt to restore accessibility focus. // if ( accessibilityFocusLayoutRestoreNode != null ) { // accessibilityFocusLayoutRestoreNode.performAction(AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS ); // } else if ( accessibilityFocusLayoutRestoreView != null ) { // this method is marked as hidden. Shame on you google! // accessibilityFocusLayoutRestoreView.requestAccessibilityFocus(); // } else if ( accessibilityFocusPosition != INVALID_POSITION ) { // Bound the position within the visible children. // final int position = MathUtils.constrain( ( accessibilityFocusPosition - mFirstPosition ), 0, ( getChildCount() - 1 ) ); // final View restoreView = getChildAt( position ); // if ( restoreView != null ) { // this method is marked as hidden. Shame on you google! // restoreView.requestAccessibilityFocus(); // } // } // tell focus view we are done mucking with it, if it is still in // our view hierarchy. if (focusLayoutRestoreView != null && focusLayoutRestoreView.getWindowToken() != null) { focusLayoutRestoreView.onFinishTemporaryDetach(); } mLayoutMode = LAYOUT_NORMAL; mDataChanged = false; if (mPositionScrollAfterLayout != null) { post(mPositionScrollAfterLayout); mPositionScrollAfterLayout = null; } mNeedSync = false; setNextSelectedPositionInt(mSelectedPosition); updateScrollIndicators(); if (mItemCount > 0) { checkSelectionChanged(); } invokeOnItemScrollListener(); } finally { if (!blockLayoutRequests) { mBlockLayoutRequests = false; } } }
From source file:com.datarita.ultimatecamera.turu.views.TwoWayView.java
private void layoutChildren() { if (getWidth() == 0 || getHeight() == 0) { return;/*from www . j a va2 s.co m*/ } final boolean blockLayoutRequests = mBlockLayoutRequests; if (!blockLayoutRequests) { mBlockLayoutRequests = true; } else { return; } try { invalidate(); if (mAdapter == null) { resetState(); return; } final int start = (mIsVertical ? getPaddingTop() : getPaddingLeft()); final int end = (mIsVertical ? getHeight() - getPaddingBottom() : getWidth() - getPaddingRight()); int childCount = getChildCount(); int index = 0; int delta = 0; View focusLayoutRestoreView = null; View selected = null; View oldSelected = null; View newSelected = null; View oldFirstChild = null; switch (mLayoutMode) { case LAYOUT_SET_SELECTION: index = mNextSelectedPosition - mFirstPosition; if (index >= 0 && index < childCount) { newSelected = getChildAt(index); } break; case LAYOUT_FORCE_TOP: case LAYOUT_FORCE_BOTTOM: case LAYOUT_SPECIFIC: case LAYOUT_SYNC: break; case LAYOUT_MOVE_SELECTION: default: // Remember the previously selected view index = mSelectedPosition - mFirstPosition; if (index >= 0 && index < childCount) { oldSelected = getChildAt(index); } // Remember the previous first child oldFirstChild = getChildAt(0); if (mNextSelectedPosition >= 0) { delta = mNextSelectedPosition - mSelectedPosition; } // Caution: newSelected might be null newSelected = getChildAt(index + delta); } final boolean dataChanged = mDataChanged; if (dataChanged) { handleDataChanged(); } // Handle the empty set by removing all views that are visible // and calling it a day if (mItemCount == 0) { resetState(); return; } else if (mItemCount != mAdapter.getCount()) { throw new IllegalStateException("The content of the mAdapter has changed but " + "TwoWayView did not receive a notification. Make sure the content of " + "your mAdapter is not modified from a background thread, but only " + "from the UI thread. [in TwoWayView(" + getId() + ", " + getClass() + ") with Adapter(" + mAdapter.getClass() + ")]"); } setSelectedPositionInt(mNextSelectedPosition); // Reset the focus restoration View focusLayoutRestoreDirectChild = null; // Pull all children into the RecycleBin. // These views will be reused if possible final int firstPosition = mFirstPosition; final RecycleBin recycleBin = mRecycler; if (dataChanged) { for (int i = 0; i < childCount; i++) { recycleBin.addScrapView(getChildAt(i), firstPosition + i); } } else { recycleBin.fillActiveViews(childCount, firstPosition); } // Take focus back to us temporarily to avoid the eventual // call to clear focus when removing the focused child below // from messing things up when ViewAncestor assigns focus back // to someone else. final View focusedChild = getFocusedChild(); if (focusedChild != null) { // We can remember the focused view to restore after relayout if the // data hasn't changed, or if the focused position is a header or footer. if (!dataChanged) { focusLayoutRestoreDirectChild = focusedChild; // Remember the specific view that had focus focusLayoutRestoreView = findFocus(); if (focusLayoutRestoreView != null) { // Tell it we are going to mess with it focusLayoutRestoreView.onStartTemporaryDetach(); } } requestFocus(); } // FIXME: We need a way to save current accessibility focus here // so that it can be restored after we re-attach the children on each // layout round. detachAllViewsFromParent(); switch (mLayoutMode) { case LAYOUT_SET_SELECTION: if (newSelected != null) { final int newSelectedStart = (mIsVertical ? newSelected.getTop() : newSelected.getLeft()); selected = fillFromSelection(newSelectedStart, start, end); } else { selected = fillFromMiddle(start, end); } break; case LAYOUT_SYNC: selected = fillSpecific(mSyncPosition, mSpecificStart); break; case LAYOUT_FORCE_BOTTOM: selected = fillBefore(mItemCount - 1, end); adjustViewsStartOrEnd(); break; case LAYOUT_FORCE_TOP: mFirstPosition = 0; selected = fillFromOffset(start); adjustViewsStartOrEnd(); break; case LAYOUT_SPECIFIC: selected = fillSpecific(reconcileSelectedPosition(), mSpecificStart); break; case LAYOUT_MOVE_SELECTION: selected = moveSelection(oldSelected, newSelected, delta, start, end); break; default: if (childCount == 0) { final int position = lookForSelectablePosition(0); setSelectedPositionInt(position); selected = fillFromOffset(start); } else { if (mSelectedPosition >= 0 && mSelectedPosition < mItemCount) { int offset = start; if (oldSelected != null) { offset = (mIsVertical ? oldSelected.getTop() : oldSelected.getLeft()); } selected = fillSpecific(mSelectedPosition, offset); } else if (mFirstPosition < mItemCount) { int offset = start; if (oldFirstChild != null) { offset = (mIsVertical ? oldFirstChild.getTop() : oldFirstChild.getLeft()); } selected = fillSpecific(mFirstPosition, offset); } else { selected = fillSpecific(0, start); } } break; } recycleBin.scrapActiveViews(); if (selected != null) { if (mItemsCanFocus && hasFocus() && !selected.hasFocus()) { final boolean focusWasTaken = (selected == focusLayoutRestoreDirectChild && focusLayoutRestoreView != null && focusLayoutRestoreView.requestFocus()) || selected.requestFocus(); if (!focusWasTaken) { // Selected item didn't take focus, fine, but still want // to make sure something else outside of the selected view // has focus final View focused = getFocusedChild(); if (focused != null) { focused.clearFocus(); } positionSelector(INVALID_POSITION, selected); } else { selected.setSelected(false); mSelectorRect.setEmpty(); } } else { positionSelector(INVALID_POSITION, selected); } mSelectedStart = (mIsVertical ? selected.getTop() : selected.getLeft()); } else { if (mTouchMode > TOUCH_MODE_DOWN && mTouchMode < TOUCH_MODE_DRAGGING) { View child = getChildAt(mMotionPosition - mFirstPosition); if (child != null) { positionSelector(mMotionPosition, child); } } else { mSelectedStart = 0; mSelectorRect.setEmpty(); } // Even if there is not selected position, we may need to restore // focus (i.e. something focusable in touch mode) if (hasFocus() && focusLayoutRestoreView != null) { focusLayoutRestoreView.requestFocus(); } } // Tell focus view we are done mucking with it, if it is still in // our view hierarchy. if (focusLayoutRestoreView != null && focusLayoutRestoreView.getWindowToken() != null) { focusLayoutRestoreView.onFinishTemporaryDetach(); } mLayoutMode = LAYOUT_NORMAL; mDataChanged = false; mNeedSync = false; setNextSelectedPositionInt(mSelectedPosition); if (mItemCount > 0) { checkSelectionChanged(); } invokeOnItemScrollListener(); } finally { if (!blockLayoutRequests) { mBlockLayoutRequests = false; mDataChanged = false; } } }
From source file:com.boutline.sports.helpers.TwoWayView.java
private void layoutChildren() { if (getWidth() == 0 || getHeight() == 0) { return;/* ww w . j a v a2 s . co m*/ } final boolean blockLayoutRequests = mBlockLayoutRequests; if (!blockLayoutRequests) { mBlockLayoutRequests = true; } else { return; } try { invalidate(); if (mAdapter == null) { resetState(); return; } final int start = getStartEdge(); final int end = getEndEdge(); int childCount = getChildCount(); int index = 0; int delta = 0; View focusLayoutRestoreView = null; View selected = null; View oldSelected = null; View newSelected = null; View oldFirstChild = null; switch (mLayoutMode) { case LAYOUT_SET_SELECTION: index = mNextSelectedPosition - mFirstPosition; if (index >= 0 && index < childCount) { newSelected = getChildAt(index); } break; case LAYOUT_FORCE_TOP: case LAYOUT_FORCE_BOTTOM: case LAYOUT_SPECIFIC: case LAYOUT_SYNC: break; case LAYOUT_MOVE_SELECTION: default: // Remember the previously selected view index = mSelectedPosition - mFirstPosition; if (index >= 0 && index < childCount) { oldSelected = getChildAt(index); } // Remember the previous first child oldFirstChild = getChildAt(0); if (mNextSelectedPosition >= 0) { delta = mNextSelectedPosition - mSelectedPosition; } // Caution: newSelected might be null newSelected = getChildAt(index + delta); } final boolean dataChanged = mDataChanged; if (dataChanged) { handleDataChanged(); } // Handle the empty set by removing all views that are visible // and calling it a day if (mItemCount == 0) { resetState(); return; } else if (mItemCount != mAdapter.getCount()) { throw new IllegalStateException("The content of the adapter has changed but " + "TwoWayView did not receive a notification. Make sure the content of " + "your adapter is not modified from a background thread, but only " + "from the UI thread. [in TwoWayView(" + getId() + ", " + getClass() + ") with Adapter(" + mAdapter.getClass() + ")]"); } setSelectedPositionInt(mNextSelectedPosition); // Reset the focus restoration View focusLayoutRestoreDirectChild = null; // Pull all children into the RecycleBin. // These views will be reused if possible final int firstPosition = mFirstPosition; final RecycleBin recycleBin = mRecycler; if (dataChanged) { for (int i = 0; i < childCount; i++) { recycleBin.addScrapView(getChildAt(i), firstPosition + i); } } else { recycleBin.fillActiveViews(childCount, firstPosition); } // Take focus back to us temporarily to avoid the eventual // call to clear focus when removing the focused child below // from messing things up when ViewAncestor assigns focus back // to someone else. final View focusedChild = getFocusedChild(); if (focusedChild != null) { // We can remember the focused view to restore after relayout if the // data hasn't changed, or if the focused position is a header or footer. if (!dataChanged) { focusLayoutRestoreDirectChild = focusedChild; // Remember the specific view that had focus focusLayoutRestoreView = findFocus(); if (focusLayoutRestoreView != null) { // Tell it we are going to mess with it focusLayoutRestoreView.onStartTemporaryDetach(); } } requestFocus(); } // FIXME: We need a way to save current accessibility focus here // so that it can be restored after we re-attach the children on each // layout round. detachAllViewsFromParent(); switch (mLayoutMode) { case LAYOUT_SET_SELECTION: if (newSelected != null) { final int newSelectedStart = (mIsVertical ? newSelected.getTop() : newSelected.getLeft()); selected = fillFromSelection(newSelectedStart, start, end); } else { selected = fillFromMiddle(start, end); } break; case LAYOUT_SYNC: selected = fillSpecific(mSyncPosition, mSpecificStart); break; case LAYOUT_FORCE_BOTTOM: selected = fillBefore(mItemCount - 1, end); adjustViewsStartOrEnd(); break; case LAYOUT_FORCE_TOP: mFirstPosition = 0; selected = fillFromOffset(start); adjustViewsStartOrEnd(); break; case LAYOUT_SPECIFIC: selected = fillSpecific(reconcileSelectedPosition(), mSpecificStart); break; case LAYOUT_MOVE_SELECTION: selected = moveSelection(oldSelected, newSelected, delta, start, end); break; default: if (childCount == 0) { final int position = lookForSelectablePosition(0); setSelectedPositionInt(position); selected = fillFromOffset(start); } else { if (mSelectedPosition >= 0 && mSelectedPosition < mItemCount) { int offset = start; if (oldSelected != null) { offset = (mIsVertical ? oldSelected.getTop() : oldSelected.getLeft()); } selected = fillSpecific(mSelectedPosition, offset); } else if (mFirstPosition < mItemCount) { int offset = start; if (oldFirstChild != null) { offset = (mIsVertical ? oldFirstChild.getTop() : oldFirstChild.getLeft()); } selected = fillSpecific(mFirstPosition, offset); } else { selected = fillSpecific(0, start); } } break; } recycleBin.scrapActiveViews(); if (selected != null) { if (mItemsCanFocus && hasFocus() && !selected.hasFocus()) { final boolean focusWasTaken = (selected == focusLayoutRestoreDirectChild && focusLayoutRestoreView != null && focusLayoutRestoreView.requestFocus()) || selected.requestFocus(); if (!focusWasTaken) { // Selected item didn't take focus, fine, but still want // to make sure something else outside of the selected view // has focus final View focused = getFocusedChild(); if (focused != null) { focused.clearFocus(); } positionSelector(INVALID_POSITION, selected); } else { selected.setSelected(false); mSelectorRect.setEmpty(); } } else { positionSelector(INVALID_POSITION, selected); } mSelectedStart = (mIsVertical ? selected.getTop() : selected.getLeft()); } else { if (mTouchMode > TOUCH_MODE_DOWN && mTouchMode < TOUCH_MODE_DRAGGING) { View child = getChildAt(mMotionPosition - mFirstPosition); if (child != null) { positionSelector(mMotionPosition, child); } } else { mSelectedStart = 0; mSelectorRect.setEmpty(); } // Even if there is not selected position, we may need to restore // focus (i.e. something focusable in touch mode) if (hasFocus() && focusLayoutRestoreView != null) { focusLayoutRestoreView.requestFocus(); } } // Tell focus view we are done mucking with it, if it is still in // our view hierarchy. if (focusLayoutRestoreView != null && focusLayoutRestoreView.getWindowToken() != null) { focusLayoutRestoreView.onFinishTemporaryDetach(); } mLayoutMode = LAYOUT_NORMAL; mDataChanged = false; mNeedSync = false; setNextSelectedPositionInt(mSelectedPosition); if (mItemCount > 0) { checkSelectionChanged(); } invokeOnItemScrollListener(); } finally { if (!blockLayoutRequests) { mBlockLayoutRequests = false; mDataChanged = false; } } }
From source file:com.aliasapps.seq.scroller.TwoWayView.java
private void layoutChildren() { if (getWidth() == 0 || getHeight() == 0) { return;/*from w w w . ja v a2 s. c o m*/ } final boolean blockLayoutRequests = mBlockLayoutRequests; if (!blockLayoutRequests) { mBlockLayoutRequests = true; } else { return; } try { invalidate(); if (mAdapter == null) { resetState(); return; } final int start = (mIsVertical ? getPaddingTop() : getPaddingLeft()); final int end = (mIsVertical ? getHeight() - getPaddingBottom() : getWidth() - getPaddingRight()); int childCount = getChildCount(); int index = 0; int delta = 0; View focusLayoutRestoreView = null; View selected = null; View oldSelected = null; View newSelected = null; View oldFirstChild = null; switch (mLayoutMode) { case LAYOUT_SET_SELECTION: index = mNextSelectedPosition - mFirstPosition; if (index >= 0 && index < childCount) { newSelected = getChildAt(index); } break; case LAYOUT_FORCE_TOP: case LAYOUT_FORCE_BOTTOM: case LAYOUT_SPECIFIC: case LAYOUT_SYNC: break; case LAYOUT_MOVE_SELECTION: default: // Remember the previously selected view index = mSelectedPosition - mFirstPosition; if (index >= 0 && index < childCount) { oldSelected = getChildAt(index); } // Remember the previous first child oldFirstChild = getChildAt(0); if (mNextSelectedPosition >= 0) { delta = mNextSelectedPosition - mSelectedPosition; } // Caution: newSelected might be null newSelected = getChildAt(index + delta); } final boolean dataChanged = mDataChanged; if (dataChanged) { handleDataChanged(); } // Handle the empty set by removing all views that are visible // and calling it a day if (mItemCount == 0) { resetState(); return; } else if (mItemCount != mAdapter.getCount()) { throw new IllegalStateException("The content of the adapter has changed but " + "TwoWayView did not receive a notification. Make sure the content of " + "your adapter is not modified from a background thread, but only " + "from the UI thread. [in TwoWayView(" + getId() + ", " + getClass() + ") with Adapter(" + mAdapter.getClass() + ")]"); } setSelectedPositionInt(mNextSelectedPosition); // Reset the focus restoration View focusLayoutRestoreDirectChild = null; // Pull all children into the RecycleBin. // These views will be reused if possible final int firstPosition = mFirstPosition; final RecycleBin recycleBin = mRecycler; if (dataChanged) { for (int i = 0; i < childCount; i++) { recycleBin.addScrapView(getChildAt(i), firstPosition + i); } } else { recycleBin.fillActiveViews(childCount, firstPosition); } // Take focus back to us temporarily to avoid the eventual // call to clear focus when removing the focused child below // from messing things up when ViewAncestor assigns focus back // to someone else. final View focusedChild = getFocusedChild(); if (focusedChild != null) { // We can remember the focused view to restore after relayout if the // data hasn't changed, or if the focused position is a header or footer. if (!dataChanged) { focusLayoutRestoreDirectChild = focusedChild; // Remember the specific view that had focus focusLayoutRestoreView = findFocus(); if (focusLayoutRestoreView != null) { // Tell it we are going to mess with it focusLayoutRestoreView.onStartTemporaryDetach(); } } requestFocus(); } // FIXME: We need a way to save current accessibility focus here // so that it can be restored after we re-attach the children on each // layout round. detachAllViewsFromParent(); switch (mLayoutMode) { case LAYOUT_SET_SELECTION: if (newSelected != null) { final int newSelectedStart = (mIsVertical ? newSelected.getTop() : newSelected.getLeft()); selected = fillFromSelection(newSelectedStart, start, end); } else { selected = fillFromMiddle(start, end); } break; case LAYOUT_SYNC: selected = fillSpecific(mSyncPosition, mSpecificStart); break; case LAYOUT_FORCE_BOTTOM: selected = fillBefore(mItemCount - 1, end); adjustViewsStartOrEnd(); break; case LAYOUT_FORCE_TOP: mFirstPosition = 0; selected = fillFromOffset(start); adjustViewsStartOrEnd(); break; case LAYOUT_SPECIFIC: selected = fillSpecific(reconcileSelectedPosition(), mSpecificStart); break; case LAYOUT_MOVE_SELECTION: selected = moveSelection(oldSelected, newSelected, delta, start, end); break; default: if (childCount == 0) { final int position = lookForSelectablePosition(0); setSelectedPositionInt(position); selected = fillFromOffset(start); } else { if (mSelectedPosition >= 0 && mSelectedPosition < mItemCount) { int offset = start; if (oldSelected != null) { offset = (mIsVertical ? oldSelected.getTop() : oldSelected.getLeft()); } selected = fillSpecific(mSelectedPosition, offset); } else if (mFirstPosition < mItemCount) { int offset = start; if (oldFirstChild != null) { offset = (mIsVertical ? oldFirstChild.getTop() : oldFirstChild.getLeft()); } selected = fillSpecific(mFirstPosition, offset); } else { selected = fillSpecific(0, start); } } break; } recycleBin.scrapActiveViews(); if (selected != null) { if (mItemsCanFocus && hasFocus() && !selected.hasFocus()) { final boolean focusWasTaken = (selected == focusLayoutRestoreDirectChild && focusLayoutRestoreView != null && focusLayoutRestoreView.requestFocus()) || selected.requestFocus(); if (!focusWasTaken) { // Selected item didn't take focus, fine, but still want // to make sure something else outside of the selected view // has focus final View focused = getFocusedChild(); if (focused != null) { focused.clearFocus(); } positionSelector(INVALID_POSITION, selected); } else { selected.setSelected(false); mSelectorRect.setEmpty(); } } else { positionSelector(INVALID_POSITION, selected); } mSelectedStart = (mIsVertical ? selected.getTop() : selected.getLeft()); } else { if (mTouchMode > TOUCH_MODE_DOWN && mTouchMode < TOUCH_MODE_DRAGGING) { View child = getChildAt(mMotionPosition - mFirstPosition); if (child != null) { positionSelector(mMotionPosition, child); } } else { mSelectedStart = 0; mSelectorRect.setEmpty(); } // Even if there is not selected position, we may need to restore // focus (i.e. something focusable in touch mode) if (hasFocus() && focusLayoutRestoreView != null) { focusLayoutRestoreView.requestFocus(); } } // Tell focus view we are done mucking with it, if it is still in // our view hierarchy. if (focusLayoutRestoreView != null && focusLayoutRestoreView.getWindowToken() != null) { focusLayoutRestoreView.onFinishTemporaryDetach(); } mLayoutMode = LAYOUT_NORMAL; mDataChanged = false; mNeedSync = false; setNextSelectedPositionInt(mSelectedPosition); if (mItemCount > 0) { checkSelectionChanged(); } invokeOnItemScrollListener(); } finally { if (!blockLayoutRequests) { mBlockLayoutRequests = false; mDataChanged = false; } } }
From source file:com.artifex.mupdf.view.ThumbnailViews.java
private void layoutChildren() { if (getWidth() == 0 || getHeight() == 0) { return;//w ww . ja v a 2 s . co m } final boolean blockLayoutRequests = mBlockLayoutRequests; if (!blockLayoutRequests) { mBlockLayoutRequests = true; } else { return; } try { invalidate(); if (mAdapter == null) { resetState(); return; } final int start = (mIsVertical ? getPaddingTop() : getPaddingLeft()); final int end = (mIsVertical ? getHeight() - getPaddingBottom() : getWidth() - getPaddingRight()); int childCount = getChildCount(); int index = 0; int delta = 0; View focusLayoutRestoreView = null; View selected = null; View oldSelected = null; View newSelected = null; View oldFirstChild = null; switch (mLayoutMode) { case LAYOUT_SET_SELECTION: index = mNextSelectedPosition - mFirstPosition; if (index >= 0 && index < childCount) { newSelected = getChildAt(index); } break; case LAYOUT_FORCE_TOP: case LAYOUT_FORCE_BOTTOM: case LAYOUT_SPECIFIC: case LAYOUT_SYNC: break; case LAYOUT_MOVE_SELECTION: default: // Remember the previously selected view index = mSelectedPosition - mFirstPosition; if (index >= 0 && index < childCount) { oldSelected = getChildAt(index); } // Remember the previous first child oldFirstChild = getChildAt(0); if (mNextSelectedPosition >= 0) { delta = mNextSelectedPosition - mSelectedPosition; } // Caution: newSelected might be null newSelected = getChildAt(index + delta); } final boolean dataChanged = mDataChanged; if (dataChanged) { handleDataChanged(); } // Handle the empty set by removing all views that are visible // and calling it a day if (mItemCount == 0) { resetState(); return; } else if (mItemCount != mAdapter.getCount()) { throw new IllegalStateException("The content of the adapter has changed but " + "TwoWayView did not receive a notification. Make sure the content of " + "your adapter is not modified from a background thread, but only " + "from the UI thread. [in TwoWayView(" + getId() + ", " + getClass() + ") with Adapter(" + mAdapter.getClass() + ")]"); } setSelectedPositionInt(mNextSelectedPosition); // Reset the focus restoration View focusLayoutRestoreDirectChild = null; // Pull all children into the RecycleBin. // These views will be reused if possible final int firstPosition = mFirstPosition; final RecycleBin recycleBin = mRecycler; if (dataChanged) { for (int i = 0; i < childCount; i++) { recycleBin.addScrapView(getChildAt(i), firstPosition + i); } } else { recycleBin.fillActiveViews(childCount, firstPosition); } // Take focus back to us temporarily to avoid the eventual // call to clear focus when removing the focused child below // from messing things up when ViewAncestor assigns focus back // to someone else. final View focusedChild = getFocusedChild(); if (focusedChild != null) { // We can remember the focused view to restore after relayout if // the // data hasn't changed, or if the focused position is a header // or footer. if (!dataChanged) { focusLayoutRestoreDirectChild = focusedChild; // Remember the specific view that had focus focusLayoutRestoreView = findFocus(); if (focusLayoutRestoreView != null) { // Tell it we are going to mess with it focusLayoutRestoreView.onStartTemporaryDetach(); } } requestFocus(); } // FIXME: We need a way to save current accessibility focus here // so that it can be restored after we re-attach the children on // each // layout round. detachAllViewsFromParent(); switch (mLayoutMode) { case LAYOUT_SET_SELECTION: if (newSelected != null) { final int newSelectedStart = (mIsVertical ? newSelected.getTop() : newSelected.getLeft()); selected = fillFromSelection(newSelectedStart, start, end); } else { selected = fillFromMiddle(start, end); } break; case LAYOUT_SYNC: selected = fillSpecific(mSyncPosition, mSpecificStart); break; case LAYOUT_FORCE_BOTTOM: selected = fillBefore(mItemCount - 1, end); adjustViewsStartOrEnd(); break; case LAYOUT_FORCE_TOP: mFirstPosition = 0; selected = fillFromOffset(start); adjustViewsStartOrEnd(); break; case LAYOUT_SPECIFIC: selected = fillSpecific(reconcileSelectedPosition(), mSpecificStart); break; case LAYOUT_MOVE_SELECTION: selected = moveSelection(oldSelected, newSelected, delta, start, end); break; default: if (childCount == 0) { final int position = lookForSelectablePosition(0); setSelectedPositionInt(position); selected = fillFromOffset(start); } else { if (mSelectedPosition >= 0 && mSelectedPosition < mItemCount) { int offset = start; if (oldSelected != null) { offset = (mIsVertical ? oldSelected.getTop() : oldSelected.getLeft()); } selected = fillSpecific(mSelectedPosition, offset); } else if (mFirstPosition < mItemCount) { int offset = start; if (oldFirstChild != null) { offset = (mIsVertical ? oldFirstChild.getTop() : oldFirstChild.getLeft()); } selected = fillSpecific(mFirstPosition, offset); } else { selected = fillSpecific(0, start); } } break; } recycleBin.scrapActiveViews(); if (selected != null) { if (mItemsCanFocus && hasFocus() && !selected.hasFocus()) { final boolean focusWasTaken = (selected == focusLayoutRestoreDirectChild && focusLayoutRestoreView != null && focusLayoutRestoreView.requestFocus()) || selected.requestFocus(); if (!focusWasTaken) { // Selected item didn't take focus, fine, but still want // to make sure something else outside of the selected // view // has focus final View focused = getFocusedChild(); if (focused != null) { focused.clearFocus(); } positionSelector(INVALID_POSITION, selected); } else { selected.setSelected(false); mSelectorRect.setEmpty(); } } else { positionSelector(INVALID_POSITION, selected); } mSelectedStart = (mIsVertical ? selected.getTop() : selected.getLeft()); } else { if (mTouchMode > TOUCH_MODE_DOWN && mTouchMode < TOUCH_MODE_DRAGGING) { View child = getChildAt(mMotionPosition - mFirstPosition); if (child != null) { positionSelector(mMotionPosition, child); } } else { mSelectedStart = 0; mSelectorRect.setEmpty(); } // Even if there is not selected position, we may need to // restore // focus (i.e. something focusable in touch mode) if (hasFocus() && focusLayoutRestoreView != null) { focusLayoutRestoreView.requestFocus(); } } // Tell focus view we are done mucking with it, if it is still in // our view hierarchy. if (focusLayoutRestoreView != null && focusLayoutRestoreView.getWindowToken() != null) { focusLayoutRestoreView.onFinishTemporaryDetach(); } mLayoutMode = LAYOUT_NORMAL; mDataChanged = false; mNeedSync = false; setNextSelectedPositionInt(mSelectedPosition); if (mItemCount > 0) { checkSelectionChanged(); } invokeOnItemScrollListener(); } finally { if (!blockLayoutRequests) { mBlockLayoutRequests = false; mDataChanged = false; } } }