private void dropOnFlingToDeleteTarget(float x, float y, PointF vel) {
final int[] coordinates = mCoordinatesTemp;
mDragObject.x = coordinates[0];
mDragObject.y = coordinates[1];
// Clean up dragging on the target if it's not the current fling delete
// target otherwise,
// start dragging to it.
if (mLastDropTarget != null && mFlingToDeleteDropTarget != mLastDropTarget) {
mLastDropTarget.onDragExit(mDragObject);
}
// Drop onto the fling-to-delete target
boolean accepted = false;
mFlingToDeleteDropTarget.onDragEnter(mDragObject);
// We must set dragComplete to true _only_ after we "enter" the
// fling-to-delete target for
// "drop"
mDragObject.dragComplete = true;
mFlingToDeleteDropTarget.onDragExit(mDragObject);
if (mFlingToDeleteDropTarget.acceptDrop(mDragObject)) {
mFlingToDeleteDropTarget.onFlingToDelete(mDragObject, mDragObject.x, mDragObject.y, vel);
accepted = true;
}
mDragObject.dragSource.onDropCompleted(
(View) mFlingToDeleteDropTarget, mDragObject, true, accepted);
}
public void forceTouchMove() {
int[] dummyCoordinates = mCoordinatesTemp;
DropTarget dropTarget = findDropTarget(mLastTouch[0], mLastTouch[1], dummyCoordinates);
mDragObject.x = dummyCoordinates[0];
mDragObject.y = dummyCoordinates[1];
checkTouchMove(dropTarget);
}
/** Stop dragging without dropping. */
public void cancelDrag() {
if (mDragging) {
if (mLastDropTarget != null) {
mLastDropTarget.onDragExit(mDragObject);
}
mDragObject.deferDragViewCleanupPostAnimation = false;
mDragObject.cancelled = true;
mDragObject.dragComplete = true;
mDragObject.dragSource.onDropCompleted(null, mDragObject, false, false);
}
endDrag();
}
private void drop(float x, float y) {
final int[] coordinates = mCoordinatesTemp;
final DropTarget dropTarget = findDropTarget((int) x, (int) y, coordinates);
mDragObject.x = coordinates[0];
mDragObject.y = coordinates[1];
boolean accepted = false;
if (dropTarget != null) {
mDragObject.dragComplete = true;
dropTarget.onDragExit(mDragObject);
if (dropTarget.acceptDrop(mDragObject)) {
dropTarget.onDrop(mDragObject);
accepted = true;
}
}
mDragObject.dragSource.onDropCompleted((View) dropTarget, mDragObject, false, accepted);
}
private void handleMoveEvent(int x, int y) {
mDragObject.dragView.move(x, y);
// Drop on someone?
final int[] coordinates = mCoordinatesTemp;
DropTarget dropTarget = findDropTarget(x, y, coordinates);
mDragObject.x = coordinates[0];
mDragObject.y = coordinates[1];
checkTouchMove(dropTarget);
// Check if we are hovering over the scroll areas
mDistanceSinceScroll +=
Math.sqrt(Math.pow(mLastTouch[0] - x, 2) + Math.pow(mLastTouch[1] - y, 2));
mLastTouch[0] = x;
mLastTouch[1] = y;
checkScrollState(x, y);
}
private DropTarget findDropTarget(int x, int y, int[] dropCoordinates) {
final Rect r = mRectTemp;
final ArrayList<DropTarget> dropTargets = mDropTargets;
final int count = dropTargets.size();
for (int i = count - 1; i >= 0; i--) {
DropTarget target = dropTargets.get(i);
if (!target.isDropEnabled()) continue;
target.getHitRectRelativeToDragLayer(r);
mDragObject.x = x;
mDragObject.y = y;
if (r.contains(x, y)) {
dropCoordinates[0] = x;
dropCoordinates[1] = y;
mLauncher.getDragLayer().mapCoordInSelfToDescendent((View) target, dropCoordinates);
return target;
}
}
return null;
}
private void endDrag() {
if (mDragging) {
mDragging = false;
clearScrollRunnable();
boolean isDeferred = false;
if (mDragObject.dragView != null) {
isDeferred = mDragObject.deferDragViewCleanupPostAnimation;
if (!isDeferred) {
mDragObject.dragView.remove();
}
mDragObject.dragView = null;
}
// Only end the drag if we are not deferred
if (!isDeferred) {
for (DragListener listener : mListeners) {
listener.onDragEnd();
}
}
}
releaseVelocityTracker();
}
/**
* Starts a drag.
*
* @param b The bitmap to display as the drag image. It will be re-scaled to the enlarged size.
* @param dragLayerX The x position in the DragLayer of the left-top of the bitmap.
* @param dragLayerY The y position in the DragLayer of the left-top of the bitmap.
* @param source An object representing where the drag originated
* @param dragInfo The data associated with the object that is being dragged
* @param dragAction The drag action: either {@link #DRAG_ACTION_MOVE} or {@link
* #DRAG_ACTION_COPY}
* @param dragRegion Coordinates within the bitmap b for the position of item being dragged. Makes
* dragging feel more precise, e.g. you can clip out a transparent border
*/
public void startDrag(
Bitmap b,
int dragLayerX,
int dragLayerY,
DragSource source,
Object dragInfo,
int dragAction,
Point dragOffset,
Rect dragRegion,
float initialDragViewScale) {
if (PROFILE_DRAWING_DURING_DRAG) {
android.os.Debug.startMethodTracing("Launcher");
}
// Hide soft keyboard, if visible
if (mInputMethodManager == null) {
mInputMethodManager =
(InputMethodManager) mLauncher.getSystemService(Context.INPUT_METHOD_SERVICE);
}
mInputMethodManager.hideSoftInputFromWindow(mWindowToken, 0);
for (DragListener listener : mListeners) {
listener.onDragStart(source, dragInfo, dragAction);
}
final int registrationX = mMotionDownX - dragLayerX;
final int registrationY = mMotionDownY - dragLayerY;
final int dragRegionLeft = dragRegion == null ? 0 : dragRegion.left;
final int dragRegionTop = dragRegion == null ? 0 : dragRegion.top;
mDragging = true;
mDragObject = new DropTarget.DragObject();
mDragObject.dragComplete = false;
mDragObject.xOffset = mMotionDownX - (dragLayerX + dragRegionLeft);
mDragObject.yOffset = mMotionDownY - (dragLayerY + dragRegionTop);
mDragObject.dragSource = source;
mDragObject.dragInfo = dragInfo;
final DragView dragView =
mDragObject.dragView =
new DragView(
mLauncher,
b,
registrationX,
registrationY,
0,
0,
b.getWidth(),
b.getHeight(),
initialDragViewScale);
if (dragOffset != null) {
dragView.setDragVisualizeOffset(new Point(dragOffset));
}
if (dragRegion != null) {
dragView.setDragRegion(new Rect(dragRegion));
}
mLauncher.getDragLayer().performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
dragView.show(mMotionDownX, mMotionDownY);
handleMoveEvent(mMotionDownX, mMotionDownY);
}
