public void onDragOver(DragObject d) {
final DragView dragView = d.dragView;
final int scrollOffset = mScrollView.getScrollY();
final float[] r = getDragViewVisualCenter(d.x, d.y, d.xOffset, d.yOffset, dragView, null);
r[0] -= getPaddingLeft();
r[1] -= getPaddingTop();
final long downTime = SystemClock.uptimeMillis();
final MotionEvent translatedEv =
MotionEvent.obtain(downTime, downTime, MotionEvent.ACTION_MOVE, d.x, d.y, 0);
if (!mAutoScrollHelper.isEnabled()) {
mAutoScrollHelper.setEnabled(true);
}
final boolean handled = mAutoScrollHelper.onTouch(this, translatedEv);
translatedEv.recycle();
if (handled) {
mReorderAlarm.cancelAlarm();
} else {
mTargetCell =
mContent.findNearestArea((int) r[0], (int) r[1] + scrollOffset, 1, 1, mTargetCell);
if (isLayoutRtl()) {
mTargetCell[0] = mContent.getCountX() - mTargetCell[0] - 1;
}
if (mTargetCell[0] != mPreviousTargetCell[0] || mTargetCell[1] != mPreviousTargetCell[1]) {
mReorderAlarm.cancelAlarm();
mReorderAlarm.setOnAlarmListener(mReorderAlarmListener);
mReorderAlarm.setAlarm(REORDER_DELAY);
mPreviousTargetCell[0] = mTargetCell[0];
mPreviousTargetCell[1] = mTargetCell[1];
}
}
}
private void setupContentDimensions(int count) {
ArrayList<View> list = getItemsInReadingOrder();
int countX = mContent.getCountX();
int countY = mContent.getCountY();
boolean done = false;
while (!done) {
int oldCountX = countX;
int oldCountY = countY;
if (countX * countY < count) {
// Current grid is too small, expand it
if ((countX <= countY || countY == mMaxCountY) && countX < mMaxCountX) {
countX++;
} else if (countY < mMaxCountY) {
countY++;
}
if (countY == 0) countY++;
} else if ((countY - 1) * countX >= count && countY >= countX) {
countY = Math.max(0, countY - 1);
} else if ((countX - 1) * countY >= count) {
countX = Math.max(0, countX - 1);
}
done = countX == oldCountX && countY == oldCountY;
}
mContent.setGridSize(countX, countY);
arrangeChildren(list);
}
/** 向Folder添加ShortcutInfo */
protected boolean createAndAddShortcut(ShortcutInfo item) {
final TextView textView = (TextView) mInflater.inflate(R.layout.application, this, false);
textView.setCompoundDrawablesWithIntrinsicBounds(
null, new FastBitmapDrawable(item.getIcon(mIconCache)), null, null);
textView.setText(item.title);
textView.setTag(item);
textView.setOnClickListener(this);
textView.setOnLongClickListener(this);
// 检查这个地方是否被其他item占据
if (mContent.getChildAt(item.cellX, item.cellY) != null
|| item.cellX < 0
|| item.cellY < 0
|| item.cellX >= mContent.getCountX()
|| item.cellY >= mContent.getCountY()) {
// 其实不应该发生
Log.e(TAG, "Folder order not properly persisted during bind");
if (!findAndSetEmptyCells(item)) {
return false;
}
}
CellLayout.LayoutParams lp =
new CellLayout.LayoutParams(item.cellX, item.cellY, item.spanX, item.spanY);
boolean insert = false;
textView.setOnKeyListener(new FolderKeyEventListener());
mContent.addViewToCellLayout(textView, insert ? 0 : -1, (int) item.id, lp, true);
return true;
}
protected boolean createAndAddShortcut(ShortcutInfo item) {
final StyledTextFoo textView =
(StyledTextFoo) mInflater.inflate(R.layout.application, this, false);
textView.setCompoundDrawablesWithIntrinsicBounds(
null, new FastBitmapDrawable(item.getIcon(mIconCache)), null, null);
textView.setText(item.title);
textView.setTag(item);
textView.setOnClickListener(this);
textView.setOnLongClickListener(this);
// We need to check here to verify that the given item's location isn't already occupied
// by another item. If it is, we need to find the next available slot and assign
// it that position. This is an issue when upgrading from the old Folders implementation
// which could contain an unlimited number of items.
if (mContent.getChildAt(item.cellX, item.cellY) != null
|| item.cellX < 0
|| item.cellY < 0
|| item.cellX >= mContent.getCountX()
|| item.cellY >= mContent.getCountY()) {
if (!findAndSetEmptyCells(item)) {
return false;
}
}
CellLayout.LayoutParams lp =
new CellLayout.LayoutParams(item.cellX, item.cellY, item.spanX, item.spanY);
boolean insert = false;
textView.setOnKeyListener(new FolderKeyEventListener());
mContent.addViewToCellLayout(textView, insert ? 0 : -1, (int) item.id, lp, true);
return true;
}
private void realTimeReorder(int[] empty, int[] target) {
boolean wrap;
int startX;
int endX;
int startY;
int delay = 0;
float delayAmount = 30;
if (readingOrderGreaterThan(target, empty)) {
wrap = empty[0] >= mContent.getCountX() - 1;
startY = wrap ? empty[1] + 1 : empty[1];
for (int y = startY; y <= target[1]; y++) {
startX = y == empty[1] ? empty[0] + 1 : 0;
endX = y < target[1] ? mContent.getCountX() - 1 : target[0];
for (int x = startX; x <= endX; x++) {
View v = mContent.getChildAt(x, y);
if (mContent.animateChildToPosition(
v, empty[0], empty[1], REORDER_ANIMATION_DURATION, delay, true, true)) {
empty[0] = x;
empty[1] = y;
delay += delayAmount;
delayAmount *= 0.9;
}
}
}
} else {
wrap = empty[0] == 0;
startY = wrap ? empty[1] - 1 : empty[1];
for (int y = startY; y >= target[1]; y--) {
startX = y == empty[1] ? empty[0] - 1 : mContent.getCountX() - 1;
endX = y > target[1] ? 0 : target[0];
for (int x = startX; x >= endX; x--) {
View v = mContent.getChildAt(x, y);
if (mContent.animateChildToPosition(
v, empty[0], empty[1], REORDER_ANIMATION_DURATION, delay, true, true)) {
empty[0] = x;
empty[1] = y;
delay += delayAmount;
delayAmount *= 0.9;
}
}
}
}
}
private View getViewForInfo(ShortcutInfo item) {
for (int j = 0; j < mContent.getCountY(); j++) {
for (int i = 0; i < mContent.getCountX(); i++) {
View v = mContent.getChildAt(i, j);
if (v.getTag() == item) {
return v;
}
}
}
return null;
}
public ArrayList<View> getItemsInReadingOrder() {
if (mItemsInvalidated) {
mItemsInReadingOrder.clear();
for (int j = 0; j < mContent.getCountY(); j++) {
for (int i = 0; i < mContent.getCountX(); i++) {
View v = mContent.getChildAt(i, j);
if (v != null) {
mItemsInReadingOrder.add(v);
}
}
}
mItemsInvalidated = false;
}
return mItemsInReadingOrder;
}
/** 左到右，上到下，为阅读顺序 */
public ArrayList<View> getItemsInReadingOrder(boolean includeCurrentDragItem) {
if (mItemsInvalidated) {
mItemsInReadingOrder.clear();
for (int j = 0; j < mContent.getCountY(); j++) {
for (int i = 0; i < mContent.getCountX(); i++) {
View v = mContent.getChildAt(i, j);
if (v != null) {
ShortcutInfo info = (ShortcutInfo) v.getTag();
if (info != mCurrentDragInfo || includeCurrentDragItem) {
mItemsInReadingOrder.add(v);
}
}
}
}
mItemsInvalidated = false;
}
return mItemsInReadingOrder;
}
private void placeInReadingOrder(ArrayList<ShortcutInfo> items) {
int maxX = 0;
int count = items.size();
for (int i = 0; i < count; i++) {
ShortcutInfo item = items.get(i);
if (item.cellX > maxX) {
maxX = item.cellX;
}
}
GridComparator gridComparator = new GridComparator(maxX + 1);
Collections.sort(items, gridComparator);
final int countX = mContent.getCountX();
for (int i = 0; i < count; i++) {
int x = i % countX;
int y = i / countX;
ShortcutInfo item = items.get(i);
item.cellX = x;
item.cellY = y;
}
}
/**
* Private helper method to sort all the CellLayout children in order of their (x,y) spatially
* from top left to bottom right.
*/
private static ArrayList<View> getCellLayoutChildrenSortedSpatially(
CellLayout layout, ViewGroup parent) {
// First we order each the CellLayout children by their x,y coordinates
final int cellCountX = layout.getCountX();
final int count = parent.getChildCount();
ArrayList<View> views = new ArrayList<View>();
for (int j = 0; j < count; ++j) {
views.add(parent.getChildAt(j));
}
Collections.sort(
views,
new Comparator<View>() {
@Override
public int compare(View lhs, View rhs) {
CellLayout.LayoutParams llp = (CellLayout.LayoutParams) lhs.getLayoutParams();
CellLayout.LayoutParams rlp = (CellLayout.LayoutParams) rhs.getLayoutParams();
int lvIndex = (llp.cellY * cellCountX) + llp.cellX;
int rvIndex = (rlp.cellY * cellCountX) + rlp.cellX;
return lvIndex - rvIndex;
}
});
return views;
}
protected View createAndAddShortcut(ShortcutInfo item) {
final BubbleTextView textView =
(BubbleTextView) mInflater.inflate(R.layout.folder_application, this, false);
textView.applyFromShortcutInfo(item, mIconCache, false);
int color =
SettingsProvider.getInt(
getContext(),
SettingsProvider.FOLDER_ICON_TEXT_COLOR,
getResources().getColor(R.color.folder_items_text_color));
textView.setTextColor(color);
textView.setOnClickListener(this);
textView.setOnLongClickListener(this);
textView.setOnFocusChangeListener(mFocusIndicatorHandler);
// We need to check here to verify that the given item's location isn't already occupied
// by another item.
if (mContent.getChildAt(item.cellX, item.cellY) != null
|| item.cellX < 0
|| item.cellY < 0
|| item.cellX >= mContent.getCountX()
|| item.cellY >= mContent.getCountY()) {
// This shouldn't happen, log it.
Log.e(TAG, "Folder order not properly persisted during bind");
if (!findAndSetEmptyCells(item)) {
return null;
}
}
CellLayout.LayoutParams lp =
new CellLayout.LayoutParams(item.cellX, item.cellY, item.spanX, item.spanY);
boolean insert = false;
textView.setOnKeyListener(new FolderKeyEventListener());
mContent.addViewToCellLayout(textView, insert ? 0 : -1, (int) item.id, lp, true);
return textView;
}
/** Based on the current deltas, we determine if and how to resize the widget. */
private void resizeWidgetIfNeeded(boolean onDismiss) {
int xThreshold = mCellLayout.getCellWidth() + mCellLayout.getWidthGap();
int yThreshold = mCellLayout.getCellHeight() + mCellLayout.getHeightGap();
int deltaX = mDeltaX + mDeltaXAddOn;
int deltaY = mDeltaY + mDeltaYAddOn;
float hSpanIncF = 1.0f * deltaX / xThreshold - mRunningHInc;
float vSpanIncF = 1.0f * deltaY / yThreshold - mRunningVInc;
int hSpanInc = 0;
int vSpanInc = 0;
int cellXInc = 0;
int cellYInc = 0;
int countX = mCellLayout.getCountX();
int countY = mCellLayout.getCountY();
if (Math.abs(hSpanIncF) > RESIZE_THRESHOLD) {
hSpanInc = Math.round(hSpanIncF);
}
if (Math.abs(vSpanIncF) > RESIZE_THRESHOLD) {
vSpanInc = Math.round(vSpanIncF);
}
if (!onDismiss && (hSpanInc == 0 && vSpanInc == 0)) return;
CellLayout.LayoutParams lp = (CellLayout.LayoutParams) mWidgetView.getLayoutParams();
int spanX = lp.cellHSpan;
int spanY = lp.cellVSpan;
int cellX = lp.useTmpCoords ? lp.tmpCellX : lp.cellX;
int cellY = lp.useTmpCoords ? lp.tmpCellY : lp.cellY;
int hSpanDelta = 0;
int vSpanDelta = 0;
// For each border, we bound the resizing based on the minimum width, and the maximum
// expandability.
if (mLeftBorderActive) {
cellXInc = Math.max(-cellX, hSpanInc);
cellXInc = Math.min(lp.cellHSpan - mMinHSpan, cellXInc);
hSpanInc *= -1;
hSpanInc = Math.min(cellX, hSpanInc);
hSpanInc = Math.max(-(lp.cellHSpan - mMinHSpan), hSpanInc);
hSpanDelta = -hSpanInc;
} else if (mRightBorderActive) {
hSpanInc = Math.min(countX - (cellX + spanX), hSpanInc);
hSpanInc = Math.max(-(lp.cellHSpan - mMinHSpan), hSpanInc);
hSpanDelta = hSpanInc;
}
if (mTopBorderActive) {
cellYInc = Math.max(-cellY, vSpanInc);
cellYInc = Math.min(lp.cellVSpan - mMinVSpan, cellYInc);
vSpanInc *= -1;
vSpanInc = Math.min(cellY, vSpanInc);
vSpanInc = Math.max(-(lp.cellVSpan - mMinVSpan), vSpanInc);
vSpanDelta = -vSpanInc;
} else if (mBottomBorderActive) {
vSpanInc = Math.min(countY - (cellY + spanY), vSpanInc);
vSpanInc = Math.max(-(lp.cellVSpan - mMinVSpan), vSpanInc);
vSpanDelta = vSpanInc;
}
mDirectionVector[0] = 0;
mDirectionVector[1] = 0;
// Update the widget's dimensions and position according to the deltas computed above
if (mLeftBorderActive || mRightBorderActive) {
spanX += hSpanInc;
cellX += cellXInc;
if (hSpanDelta != 0) {
mDirectionVector[0] = mLeftBorderActive ? -1 : 1;
}
}
if (mTopBorderActive || mBottomBorderActive) {
spanY += vSpanInc;
cellY += cellYInc;
if (vSpanDelta != 0) {
mDirectionVector[1] = mTopBorderActive ? -1 : 1;
}
}
if (!onDismiss && vSpanDelta == 0 && hSpanDelta == 0) return;
// We always want the final commit to match the feedback, so we make sure to use the
// last used direction vector when committing the resize / reorder.
if (onDismiss) {
mDirectionVector[0] = mLastDirectionVector[0];
mDirectionVector[1] = mLastDirectionVector[1];
} else {
mLastDirectionVector[0] = mDirectionVector[0];
mLastDirectionVector[1] = mDirectionVector[1];
}
if (mCellLayout.createAreaForResize(
cellX, cellY, spanX, spanY, mWidgetView, mDirectionVector, onDismiss)) {
lp.tmpCellX = cellX;
lp.tmpCellY = cellY;
lp.cellHSpan = spanX;
lp.cellVSpan = spanY;
mRunningVInc += vSpanDelta;
mRunningHInc += hSpanDelta;
if (!onDismiss) {
updateWidgetSizeRanges(mWidgetView, mLauncher, spanX, spanY);
}
}
mWidgetView.requestLayout();
}