diff options
Diffstat (limited to 'src/com/android/launcher3/PagedViewWithDraggableItems.java')
-rw-r--r-- | src/com/android/launcher3/PagedViewWithDraggableItems.java | 174 |
1 files changed, 0 insertions, 174 deletions
diff --git a/src/com/android/launcher3/PagedViewWithDraggableItems.java b/src/com/android/launcher3/PagedViewWithDraggableItems.java deleted file mode 100644 index 0e593698d..000000000 --- a/src/com/android/launcher3/PagedViewWithDraggableItems.java +++ /dev/null @@ -1,174 +0,0 @@ -/* - * Copyright (C) 2010 The Android Open Source Project - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -package com.android.launcher3; - -import android.content.Context; -import android.util.AttributeSet; -import android.view.MotionEvent; -import android.view.View; - - -/* Class that does most of the work of enabling dragging items out of a PagedView by performing a - * vertical drag. Used by both CustomizePagedView and AllAppsPagedView. - * Subclasses must do the following: - * * call setDragSlopeThreshold after making an instance of the PagedViewWithDraggableItems - * * call child.setOnLongClickListener(this) and child.setOnTouchListener(this) on all children - * (good place to do it is in syncPageItems) - * * override beginDragging(View) (but be careful to call super.beginDragging(View) - * - */ -public abstract class PagedViewWithDraggableItems extends PagedView - implements View.OnLongClickListener, View.OnTouchListener { - private View mLastTouchedItem; - private boolean mIsDragging; - private boolean mIsDragEnabled; - private float mDragSlopeThreshold; - private Launcher mLauncher; - - public PagedViewWithDraggableItems(Context context) { - this(context, null); - } - - public PagedViewWithDraggableItems(Context context, AttributeSet attrs) { - this(context, attrs, 0); - } - - public PagedViewWithDraggableItems(Context context, AttributeSet attrs, int defStyle) { - super(context, attrs, defStyle); - mLauncher = (Launcher) context; - } - - protected boolean beginDragging(View v) { - boolean wasDragging = mIsDragging; - mIsDragging = true; - return !wasDragging; - } - - protected void cancelDragging() { - mIsDragging = false; - mLastTouchedItem = null; - mIsDragEnabled = false; - } - - private void handleTouchEvent(MotionEvent ev) { - final int action = ev.getAction(); - switch (action & MotionEvent.ACTION_MASK) { - case MotionEvent.ACTION_DOWN: - cancelDragging(); - mIsDragEnabled = true; - break; - case MotionEvent.ACTION_MOVE: - if (mTouchState != TOUCH_STATE_SCROLLING && !mIsDragging && mIsDragEnabled) { - determineDraggingStart(ev); - } - break; - } - } - - @Override - public boolean onInterceptTouchEvent(MotionEvent ev) { - handleTouchEvent(ev); - return super.onInterceptTouchEvent(ev); - } - - @Override - public boolean onTouchEvent(MotionEvent ev) { - handleTouchEvent(ev); - return super.onTouchEvent(ev); - } - - public void trimMemory() { - mLastTouchedItem = null; - } - - @Override - public boolean onTouch(View v, MotionEvent event) { - mLastTouchedItem = v; - mIsDragEnabled = true; - return false; - } - - @Override - public boolean onLongClick(View v) { - // Return early if this is not initiated from a touch - if (!v.isInTouchMode()) return false; - // Return early if we are still animating the pages - if (mNextPage != INVALID_PAGE) return false; - // When we have exited all apps or are in transition, disregard long clicks - if (!mLauncher.isAllAppsVisible() || - mLauncher.getWorkspace().isSwitchingState()) return false; - // Return if global dragging is not enabled - if (!mLauncher.isDraggingEnabled()) return false; - - return beginDragging(v); - } - - /* - * Determines if we should change the touch state to start scrolling after the - * user moves their touch point too far. - */ - protected void determineScrollingStart(MotionEvent ev) { - if (!mIsDragging) super.determineScrollingStart(ev); - } - - /* - * Determines if we should change the touch state to start dragging after the - * user moves their touch point far enough. - */ - protected void determineDraggingStart(MotionEvent ev) { - /* - * Locally do absolute value. mLastMotionX is set to the y value - * of the down event. - */ - final int pointerIndex = ev.findPointerIndex(mActivePointerId); - final float x = ev.getX(pointerIndex); - final float y = ev.getY(pointerIndex); - final int xDiff = (int) Math.abs(x - mLastMotionX); - final int yDiff = (int) Math.abs(y - mLastMotionY); - - final int touchSlop = mTouchSlop; - boolean yMoved = yDiff > touchSlop; - boolean isUpwardMotion = (yDiff / (float) xDiff) > mDragSlopeThreshold; - - if (isUpwardMotion && yMoved && mLastTouchedItem != null) { - // Drag if the user moved far enough along the Y axis - beginDragging(mLastTouchedItem); - - // Cancel any pending long press - if (mAllowLongPress) { - mAllowLongPress = false; - // Try canceling the long press. It could also have been scheduled - // by a distant descendant, so use the mAllowLongPress flag to block - // everything - final View currentPage = getPageAt(mCurrentPage); - if (currentPage != null) { - currentPage.cancelLongPress(); - } - } - } - } - - public void setDragSlopeThreshold(float dragSlopeThreshold) { - mDragSlopeThreshold = dragSlopeThreshold; - } - - @Override - protected void onDetachedFromWindow() { - cancelDragging(); - super.onDetachedFromWindow(); - } -} |