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Diffstat (limited to 'src/com/android/launcher/DragLayer.java')
| -rw-r--r-- | src/com/android/launcher/DragLayer.java | 537 |
1 files changed, 0 insertions, 537 deletions
diff --git a/src/com/android/launcher/DragLayer.java b/src/com/android/launcher/DragLayer.java deleted file mode 100644 index aa6615a22..000000000 --- a/src/com/android/launcher/DragLayer.java +++ /dev/null @@ -1,537 +0,0 @@ -/* - * Copyright (C) 2008 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.launcher; - -import android.content.Context; -import android.graphics.Bitmap; -import android.graphics.Canvas; -import android.graphics.Matrix; -import android.graphics.Rect; -import android.graphics.RectF; -import android.graphics.Paint; -import android.graphics.PorterDuffColorFilter; -import android.graphics.PorterDuff; -import android.os.Vibrator; -import android.os.SystemClock; -import android.util.AttributeSet; -import android.view.MotionEvent; -import android.view.View; -import android.view.ViewGroup; -import android.view.KeyEvent; -import android.widget.FrameLayout; - -/** - * A ViewGroup that coordinated dragging across its dscendants - */ -public class DragLayer extends FrameLayout implements DragController { - private static final int SCROLL_DELAY = 600; - private static final int SCROLL_ZONE = 20; - private static final int VIBRATE_DURATION = 35; - private static final int ANIMATION_SCALE_UP_DURATION = 110; - - private static final boolean PROFILE_DRAWING_DURING_DRAG = false; - - // Number of pixels to add to the dragged item for scaling - private static final float DRAG_SCALE = 24.0f; - - private boolean mDragging = false; - private boolean mShouldDrop; - private float mLastMotionX; - private float mLastMotionY; - - /** - * The bitmap that is currently being dragged - */ - private Bitmap mDragBitmap = null; - private View mOriginator; - - private int mBitmapOffsetX; - private int mBitmapOffsetY; - - /** - * X offset from where we touched on the cell to its upper-left corner - */ - private float mTouchOffsetX; - - /** - * Y offset from where we touched on the cell to its upper-left corner - */ - private float mTouchOffsetY; - - /** - * Utility rectangle - */ - private Rect mDragRect = new Rect(); - - /** - * Where the drag originated - */ - private DragSource mDragSource; - - /** - * The data associated with the object being dragged - */ - private Object mDragInfo; - - private final Rect mRect = new Rect(); - private final int[] mDropCoordinates = new int[2]; - - private final Vibrator mVibrator = new Vibrator(); - - private DragListener mListener; - - private DragScroller mDragScroller; - - private static final int SCROLL_OUTSIDE_ZONE = 0; - private static final int SCROLL_WAITING_IN_ZONE = 1; - - private static final int SCROLL_LEFT = 0; - private static final int SCROLL_RIGHT = 1; - - private int mScrollState = SCROLL_OUTSIDE_ZONE; - - private ScrollRunnable mScrollRunnable = new ScrollRunnable(); - private View mIgnoredDropTarget; - - private RectF mDragRegion; - private boolean mEnteredRegion; - private DropTarget mLastDropTarget; - - private final Paint mTrashPaint = new Paint(); - private Paint mDragPaint; - - private static final int ANIMATION_STATE_STARTING = 1; - private static final int ANIMATION_STATE_RUNNING = 2; - private static final int ANIMATION_STATE_DONE = 3; - - private static final int ANIMATION_TYPE_SCALE = 1; - - private float mAnimationFrom; - private float mAnimationTo; - private int mAnimationDuration; - private long mAnimationStartTime; - private int mAnimationType; - private int mAnimationState = ANIMATION_STATE_DONE; - - /** - * Used to create a new DragLayer from XML. - * - * @param context The application's context. - * @param attrs The attribtues set containing the Workspace's customization values. - */ - public DragLayer(Context context, AttributeSet attrs) { - super(context, attrs); - - final int srcColor = context.getResources().getColor(R.color.delete_color_filter); - mTrashPaint.setColorFilter(new PorterDuffColorFilter(srcColor, PorterDuff.Mode.SRC_ATOP)); - } - - public void startDrag(View v, DragSource source, Object dragInfo, int dragAction) { - if (PROFILE_DRAWING_DURING_DRAG) { - android.os.Debug.startMethodTracing("Launcher"); - } - - if (mListener != null) { - mListener.onDragStart(v, source, dragInfo, dragAction); - } - - Rect r = mDragRect; - r.set(v.getScrollX(), v.getScrollY(), 0, 0); - - offsetDescendantRectToMyCoords(v, r); - mTouchOffsetX = mLastMotionX - r.left; - mTouchOffsetY = mLastMotionY - r.top; - - v.clearFocus(); - v.setPressed(false); - - boolean willNotCache = v.willNotCacheDrawing(); - v.setWillNotCacheDrawing(false); - v.buildDrawingCache(); - - Bitmap viewBitmap = v.getDrawingCache(); - int width = viewBitmap.getWidth(); - int height = viewBitmap.getHeight(); - - Matrix scale = new Matrix(); - float scaleFactor = v.getWidth(); - scaleFactor = (scaleFactor + DRAG_SCALE) /scaleFactor; - scale.setScale(scaleFactor, scaleFactor); - - mAnimationTo = 1.0f; - mAnimationFrom = 1.0f / scaleFactor; - mAnimationDuration = ANIMATION_SCALE_UP_DURATION; - mAnimationState = ANIMATION_STATE_STARTING; - mAnimationType = ANIMATION_TYPE_SCALE; - - mDragBitmap = Bitmap.createBitmap(viewBitmap, 0, 0, width, height, scale, true); - v.destroyDrawingCache(); - v.setWillNotCacheDrawing(willNotCache); - - final Bitmap dragBitmap = mDragBitmap; - mBitmapOffsetX = (dragBitmap.getWidth() - width) / 2; - mBitmapOffsetY = (dragBitmap.getHeight() - height) / 2; - - if (dragAction == DRAG_ACTION_MOVE) { - v.setVisibility(GONE); - } - - mDragPaint = null; - mDragging = true; - mShouldDrop = true; - mOriginator = v; - mDragSource = source; - mDragInfo = dragInfo; - - mVibrator.vibrate(VIBRATE_DURATION); - - mEnteredRegion = false; - - invalidate(); - } - - @Override - public boolean dispatchKeyEvent(KeyEvent event) { - return mDragging || super.dispatchKeyEvent(event); - } - - @Override - protected void dispatchDraw(Canvas canvas) { - super.dispatchDraw(canvas); - - if (mDragging && mDragBitmap != null) { - if (mAnimationState == ANIMATION_STATE_STARTING) { - mAnimationStartTime = SystemClock.uptimeMillis(); - mAnimationState = ANIMATION_STATE_RUNNING; - } - - if (mAnimationState == ANIMATION_STATE_RUNNING) { - float normalized = (float) (SystemClock.uptimeMillis() - mAnimationStartTime) / - mAnimationDuration; - if (normalized >= 1.0f) { - mAnimationState = ANIMATION_STATE_DONE; - } - normalized = Math.min(normalized, 1.0f); - final float value = mAnimationFrom + (mAnimationTo - mAnimationFrom) * normalized; - - switch (mAnimationType) { - case ANIMATION_TYPE_SCALE: - final Bitmap dragBitmap = mDragBitmap; - canvas.save(); - canvas.translate(mScrollX + mLastMotionX - mTouchOffsetX - mBitmapOffsetX, - mScrollY + mLastMotionY - mTouchOffsetY - mBitmapOffsetY); - canvas.translate((dragBitmap.getWidth() * (1.0f - value)) / 2, - (dragBitmap.getHeight() * (1.0f - value)) / 2); - canvas.scale(value, value); - canvas.drawBitmap(dragBitmap, 0.0f, 0.0f, mDragPaint); - canvas.restore(); - break; - } - } else { - canvas.drawBitmap(mDragBitmap, - mScrollX + mLastMotionX - mTouchOffsetX - mBitmapOffsetX, - mScrollY + mLastMotionY - mTouchOffsetY - mBitmapOffsetY, mDragPaint); - } - } - } - - private void endDrag() { - if (mDragging) { - mDragging = false; - if (mDragBitmap != null) { - mDragBitmap.recycle(); - } - if (mOriginator != null) { - mOriginator.setVisibility(VISIBLE); - } - if (mListener != null) { - mListener.onDragEnd(); - } - } - } - - @Override - public boolean onInterceptTouchEvent(MotionEvent ev) { - final int action = ev.getAction(); - - final float x = ev.getX(); - final float y = ev.getY(); - - switch (action) { - case MotionEvent.ACTION_MOVE: - break; - - case MotionEvent.ACTION_DOWN: - // Remember location of down touch - mLastMotionX = x; - mLastMotionY = y; - mLastDropTarget = null; - break; - - case MotionEvent.ACTION_CANCEL: - case MotionEvent.ACTION_UP: - if (mShouldDrop && drop(x, y)) { - mShouldDrop = false; - } - endDrag(); - break; - } - - return mDragging; - } - - @Override - public boolean onTouchEvent(MotionEvent ev) { - if (!mDragging) { - return false; - } - - final int action = ev.getAction(); - final float x = ev.getX(); - final float y = ev.getY(); - - switch (action) { - case MotionEvent.ACTION_DOWN: - - // Remember where the motion event started - mLastMotionX = x; - mLastMotionY = y; - - if ((x < SCROLL_ZONE) || (x > getWidth() - SCROLL_ZONE)) { - mScrollState = SCROLL_WAITING_IN_ZONE; - postDelayed(mScrollRunnable, SCROLL_DELAY); - } else { - mScrollState = SCROLL_OUTSIDE_ZONE; - } - - break; - case MotionEvent.ACTION_MOVE: - final int scrollX = mScrollX; - final int scrollY = mScrollY; - - final float touchX = mTouchOffsetX; - final float touchY = mTouchOffsetY; - - final int offsetX = mBitmapOffsetX; - final int offsetY = mBitmapOffsetY; - - int left = (int) (scrollX + mLastMotionX - touchX - offsetX); - int top = (int) (scrollY + mLastMotionY - touchY - offsetY); - - final Bitmap dragBitmap = mDragBitmap; - final int width = dragBitmap.getWidth(); - final int height = dragBitmap.getHeight(); - - final Rect rect = mRect; - rect.set(left - 1, top - 1, left + width + 1, top + height + 1); - - mLastMotionX = x; - mLastMotionY = y; - - left = (int) (scrollX + x - touchX - offsetX); - top = (int) (scrollY + y - touchY - offsetY); - - rect.union(left - 1, top - 1, left + width + 1, top + height + 1); - invalidate(rect); - - final int[] coordinates = mDropCoordinates; - DropTarget dropTarget = findDropTarget((int) x, (int) y, coordinates); - if (dropTarget != null) { - if (mLastDropTarget == dropTarget) { - dropTarget.onDragOver(mDragSource, coordinates[0], coordinates[1], - (int) mTouchOffsetX, (int) mTouchOffsetY, mDragInfo); - } else { - if (mLastDropTarget != null) { - mLastDropTarget.onDragExit(mDragSource, coordinates[0], coordinates[1], - (int) mTouchOffsetX, (int) mTouchOffsetY, mDragInfo); - } - dropTarget.onDragEnter(mDragSource, coordinates[0], coordinates[1], - (int) mTouchOffsetX, (int) mTouchOffsetY, mDragInfo); - } - } else { - if (mLastDropTarget != null) { - mLastDropTarget.onDragExit(mDragSource, coordinates[0], coordinates[1], - (int) mTouchOffsetX, (int) mTouchOffsetY, mDragInfo); - } - } - mLastDropTarget = dropTarget; - - boolean inDragRegion = false; - if (mDragRegion != null) { - final RectF region = mDragRegion; - final boolean inRegion = region.contains(ev.getRawX(), ev.getRawY()); - if (!mEnteredRegion && inRegion) { - mDragPaint = mTrashPaint; - mEnteredRegion = true; - inDragRegion = true; - } else if (mEnteredRegion && !inRegion) { - mDragPaint = null; - mEnteredRegion = false; - } - } - - if (!inDragRegion && x < SCROLL_ZONE) { - if (mScrollState == SCROLL_OUTSIDE_ZONE) { - mScrollState = SCROLL_WAITING_IN_ZONE; - mScrollRunnable.setDirection(SCROLL_LEFT); - postDelayed(mScrollRunnable, SCROLL_DELAY); - } - } else if (!inDragRegion && x > getWidth() - SCROLL_ZONE) { - if (mScrollState == SCROLL_OUTSIDE_ZONE) { - mScrollState = SCROLL_WAITING_IN_ZONE; - mScrollRunnable.setDirection(SCROLL_RIGHT); - postDelayed(mScrollRunnable, SCROLL_DELAY); - } - } else { - if (mScrollState == SCROLL_WAITING_IN_ZONE) { - mScrollState = SCROLL_OUTSIDE_ZONE; - mScrollRunnable.setDirection(SCROLL_RIGHT); - removeCallbacks(mScrollRunnable); - } - } - - break; - case MotionEvent.ACTION_UP: - removeCallbacks(mScrollRunnable); - if (mShouldDrop) { - drop(x, y); - mShouldDrop = false; - } - endDrag(); - - break; - case MotionEvent.ACTION_CANCEL: - endDrag(); - } - - return true; - } - - private boolean drop(float x, float y) { - invalidate(); - - final int[] coordinates = mDropCoordinates; - DropTarget dropTarget = findDropTarget((int) x, (int) y, coordinates); - - if (dropTarget != null) { - dropTarget.onDragExit(mDragSource, coordinates[0], coordinates[1], - (int) mTouchOffsetX, (int) mTouchOffsetY, mDragInfo); - if (dropTarget.acceptDrop(mDragSource, coordinates[0], coordinates[1], - (int) mTouchOffsetX, (int) mTouchOffsetY, mDragInfo)) { - dropTarget.onDrop(mDragSource, coordinates[0], coordinates[1], - (int) mTouchOffsetX, (int) mTouchOffsetY, mDragInfo); - mDragSource.onDropCompleted((View) dropTarget, true); - return true; - } else { - mDragSource.onDropCompleted((View) dropTarget, false); - return true; - } - } - return false; - } - - DropTarget findDropTarget(int x, int y, int[] dropCoordinates) { - return findDropTarget(this, x, y, dropCoordinates); - } - - private DropTarget findDropTarget(ViewGroup container, int x, int y, int[] dropCoordinates) { - final Rect r = mDragRect; - final int count = container.getChildCount(); - final int scrolledX = x + container.getScrollX(); - final int scrolledY = y + container.getScrollY(); - final View ignoredDropTarget = mIgnoredDropTarget; - - for (int i = count - 1; i >= 0; i--) { - final View child = container.getChildAt(i); - if (child.getVisibility() == VISIBLE && child != ignoredDropTarget) { - child.getHitRect(r); - if (r.contains(scrolledX, scrolledY)) { - DropTarget target = null; - if (child instanceof ViewGroup) { - x = scrolledX - child.getLeft(); - y = scrolledY - child.getTop(); - target = findDropTarget((ViewGroup) child, x, y, dropCoordinates); - } - if (target == null) { - if (child instanceof DropTarget) { - dropCoordinates[0] = x; - dropCoordinates[1] = y; - return (DropTarget) child; - } - } else { - return target; - } - } - } - } - - return null; - } - - public void setDragScoller(DragScroller scroller) { - mDragScroller = scroller; - } - - public void setDragListener(DragListener l) { - mListener = l; - } - - public void removeDragListener(DragListener l) { - mListener = null; - } - - /** - * Specifies the view that must be ignored when looking for a drop target. - * - * @param view The view that will not be taken into account while looking - * for a drop target. - */ - void setIgnoredDropTarget(View view) { - mIgnoredDropTarget = view; - } - - /** - * Specifies the delete region. - * - * @param region The rectangle in screen coordinates of the delete region. - */ - void setDeleteRegion(RectF region) { - mDragRegion = region; - } - - private class ScrollRunnable implements Runnable { - private int mDirection; - - ScrollRunnable() { - } - - public void run() { - if (mDragScroller != null) { - if (mDirection == SCROLL_LEFT) { - mDragScroller.scrollLeft(); - } else { - mDragScroller.scrollRight(); - } - mScrollState = SCROLL_OUTSIDE_ZONE; - } - } - - void setDirection(int direction) { - mDirection = direction; - } - } -} |