| /* |
| * 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.launcher2; |
| |
| import java.util.Arrays; |
| |
| import android.animation.Animator; |
| import android.animation.AnimatorListenerAdapter; |
| import android.animation.AnimatorSet; |
| import android.animation.ObjectAnimator; |
| import android.animation.TimeInterpolator; |
| import android.animation.ValueAnimator; |
| import android.animation.ValueAnimator.AnimatorUpdateListener; |
| import android.content.Context; |
| import android.content.res.Resources; |
| import android.content.res.TypedArray; |
| import android.graphics.Bitmap; |
| import android.graphics.Canvas; |
| import android.graphics.Paint; |
| import android.graphics.Point; |
| import android.graphics.PointF; |
| import android.graphics.Rect; |
| import android.graphics.RectF; |
| import android.graphics.Region; |
| import android.graphics.drawable.Drawable; |
| import android.util.AttributeSet; |
| import android.util.Log; |
| import android.view.MotionEvent; |
| import android.view.View; |
| import android.view.ViewDebug; |
| import android.view.ViewGroup; |
| import android.view.animation.Animation; |
| import android.view.animation.DecelerateInterpolator; |
| import android.view.animation.LayoutAnimationController; |
| |
| import com.android.launcher.R; |
| |
| public class CellLayout extends ViewGroup { |
| static final String TAG = "CellLayout"; |
| |
| private int mCellWidth; |
| private int mCellHeight; |
| |
| private int mLeftPadding; |
| private int mRightPadding; |
| private int mTopPadding; |
| private int mBottomPadding; |
| |
| private int mCountX; |
| private int mCountY; |
| |
| private int mWidthGap; |
| private int mHeightGap; |
| |
| private final Rect mRect = new Rect(); |
| private final CellInfo mCellInfo = new CellInfo(); |
| |
| // These are temporary variables to prevent having to allocate a new object just to |
| // return an (x, y) value from helper functions. Do NOT use them to maintain other state. |
| private final int[] mTmpCellXY = new int[2]; |
| private final int[] mTmpPoint = new int[2]; |
| private final PointF mTmpPointF = new PointF(); |
| |
| boolean[][] mOccupied; |
| |
| private OnTouchListener mInterceptTouchListener; |
| |
| private float mBackgroundAlpha; |
| private float mBackgroundAlphaMultiplier = 1.0f; |
| |
| private Drawable mNormalBackground; |
| private Drawable mActiveBackground; |
| private Drawable mActiveGlowBackground; |
| private Drawable mNormalBackgroundMini; |
| private Drawable mNormalGlowBackgroundMini; |
| private Drawable mActiveBackgroundMini; |
| private Drawable mActiveGlowBackgroundMini; |
| private Rect mBackgroundRect; |
| private Rect mGlowBackgroundRect; |
| private float mGlowBackgroundScale; |
| private float mGlowBackgroundAlpha; |
| |
| private boolean mAcceptsDrops = true; |
| // If we're actively dragging something over this screen, mIsDragOverlapping is true |
| private boolean mIsDragOverlapping = false; |
| private boolean mIsDragOccuring = false; |
| private boolean mIsDefaultDropTarget = false; |
| private final Point mDragCenter = new Point(); |
| |
| // These arrays are used to implement the drag visualization on x-large screens. |
| // They are used as circular arrays, indexed by mDragOutlineCurrent. |
| private Point[] mDragOutlines = new Point[8]; |
| private float[] mDragOutlineAlphas = new float[mDragOutlines.length]; |
| private InterruptibleInOutAnimator[] mDragOutlineAnims = |
| new InterruptibleInOutAnimator[mDragOutlines.length]; |
| |
| // Used as an index into the above 3 arrays; indicates which is the most current value. |
| private int mDragOutlineCurrent = 0; |
| private final Paint mDragOutlinePaint = new Paint(); |
| |
| private BubbleTextView mPressedOrFocusedIcon; |
| |
| private Drawable mCrosshairsDrawable = null; |
| private InterruptibleInOutAnimator mCrosshairsAnimator = null; |
| private float mCrosshairsVisibility = 0.0f; |
| |
| // When a drag operation is in progress, holds the nearest cell to the touch point |
| private final int[] mDragCell = new int[2]; |
| |
| private boolean mDragging = false; |
| |
| private TimeInterpolator mEaseOutInterpolator; |
| private CellLayoutChildren mChildren; |
| |
| public CellLayout(Context context) { |
| this(context, null); |
| } |
| |
| public CellLayout(Context context, AttributeSet attrs) { |
| this(context, attrs, 0); |
| } |
| |
| public CellLayout(Context context, AttributeSet attrs, int defStyle) { |
| super(context, attrs, defStyle); |
| |
| // A ViewGroup usually does not draw, but CellLayout needs to draw a rectangle to show |
| // the user where a dragged item will land when dropped. |
| setWillNotDraw(false); |
| |
| TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.CellLayout, defStyle, 0); |
| |
| mCellWidth = a.getDimensionPixelSize(R.styleable.CellLayout_cellWidth, 10); |
| mCellHeight = a.getDimensionPixelSize(R.styleable.CellLayout_cellHeight, 10); |
| mWidthGap = a.getDimensionPixelSize(R.styleable.CellLayout_widthGap, -1); |
| mHeightGap = a.getDimensionPixelSize(R.styleable.CellLayout_heightGap, -1); |
| |
| mLeftPadding = |
| a.getDimensionPixelSize(R.styleable.CellLayout_xAxisStartPadding, 10); |
| mRightPadding = |
| a.getDimensionPixelSize(R.styleable.CellLayout_xAxisEndPadding, 10); |
| mTopPadding = |
| a.getDimensionPixelSize(R.styleable.CellLayout_yAxisStartPadding, 10); |
| mBottomPadding = |
| a.getDimensionPixelSize(R.styleable.CellLayout_yAxisEndPadding, 10); |
| |
| mCountX = LauncherModel.getCellCountX(); |
| mCountY = LauncherModel.getCellCountY(); |
| mOccupied = new boolean[mCountX][mCountY]; |
| |
| a.recycle(); |
| |
| setAlwaysDrawnWithCacheEnabled(false); |
| |
| final Resources res = getResources(); |
| |
| if (LauncherApplication.isScreenXLarge()) { |
| mNormalBackground = res.getDrawable(R.drawable.homescreen_large_blue); |
| mActiveBackground = res.getDrawable(R.drawable.homescreen_large_green); |
| mActiveGlowBackground = res.getDrawable(R.drawable.homescreen_large_green_strong); |
| |
| mNormalBackgroundMini = res.getDrawable(R.drawable.homescreen_small_blue); |
| mNormalGlowBackgroundMini = res.getDrawable(R.drawable.homescreen_small_blue_strong); |
| mActiveBackgroundMini = res.getDrawable(R.drawable.homescreen_small_green); |
| mActiveGlowBackgroundMini = res.getDrawable(R.drawable.homescreen_small_green_strong); |
| |
| mNormalBackground.setFilterBitmap(true); |
| mActiveBackground.setFilterBitmap(true); |
| mActiveGlowBackground.setFilterBitmap(true); |
| mNormalBackgroundMini.setFilterBitmap(true); |
| mNormalGlowBackgroundMini.setFilterBitmap(true); |
| mActiveBackgroundMini.setFilterBitmap(true); |
| mActiveGlowBackgroundMini.setFilterBitmap(true); |
| } |
| |
| // Initialize the data structures used for the drag visualization. |
| |
| mCrosshairsDrawable = res.getDrawable(R.drawable.gardening_crosshairs); |
| mEaseOutInterpolator = new DecelerateInterpolator(2.5f); // Quint ease out |
| |
| // Set up the animation for fading the crosshairs in and out |
| int animDuration = res.getInteger(R.integer.config_crosshairsFadeInTime); |
| mCrosshairsAnimator = new InterruptibleInOutAnimator(animDuration, 0.0f, 1.0f); |
| mCrosshairsAnimator.getAnimator().addUpdateListener(new AnimatorUpdateListener() { |
| public void onAnimationUpdate(ValueAnimator animation) { |
| mCrosshairsVisibility = ((Float) animation.getAnimatedValue()).floatValue(); |
| invalidate(); |
| } |
| }); |
| mCrosshairsAnimator.getAnimator().setInterpolator(mEaseOutInterpolator); |
| |
| for (int i = 0; i < mDragOutlines.length; i++) { |
| mDragOutlines[i] = new Point(-1, -1); |
| } |
| |
| // When dragging things around the home screens, we show a green outline of |
| // where the item will land. The outlines gradually fade out, leaving a trail |
| // behind the drag path. |
| // Set up all the animations that are used to implement this fading. |
| final int duration = res.getInteger(R.integer.config_dragOutlineFadeTime); |
| final float fromAlphaValue = 0; |
| final float toAlphaValue = (float)res.getInteger(R.integer.config_dragOutlineMaxAlpha); |
| |
| Arrays.fill(mDragOutlineAlphas, fromAlphaValue); |
| |
| for (int i = 0; i < mDragOutlineAnims.length; i++) { |
| final InterruptibleInOutAnimator anim = |
| new InterruptibleInOutAnimator(duration, fromAlphaValue, toAlphaValue); |
| anim.getAnimator().setInterpolator(mEaseOutInterpolator); |
| final int thisIndex = i; |
| anim.getAnimator().addUpdateListener(new AnimatorUpdateListener() { |
| public void onAnimationUpdate(ValueAnimator animation) { |
| final Bitmap outline = (Bitmap)anim.getTag(); |
| |
| // If an animation is started and then stopped very quickly, we can still |
| // get spurious updates we've cleared the tag. Guard against this. |
| if (outline == null) { |
| if (false) { |
| Object val = animation.getAnimatedValue(); |
| Log.d(TAG, "anim " + thisIndex + " update: " + val + |
| ", isStopped " + anim.isStopped()); |
| } |
| // Try to prevent it from continuing to run |
| animation.cancel(); |
| } else { |
| mDragOutlineAlphas[thisIndex] = (Float) animation.getAnimatedValue(); |
| final int left = mDragOutlines[thisIndex].x; |
| final int top = mDragOutlines[thisIndex].y; |
| CellLayout.this.invalidate(left, top, |
| left + outline.getWidth(), top + outline.getHeight()); |
| } |
| } |
| }); |
| // The animation holds a reference to the drag outline bitmap as long is it's |
| // running. This way the bitmap can be GCed when the animations are complete. |
| anim.getAnimator().addListener(new AnimatorListenerAdapter() { |
| @Override |
| public void onAnimationEnd(Animator animation) { |
| if ((Float) ((ValueAnimator) animation).getAnimatedValue() == 0f) { |
| anim.setTag(null); |
| } |
| } |
| }); |
| mDragOutlineAnims[i] = anim; |
| } |
| |
| mBackgroundRect = new Rect(); |
| mGlowBackgroundRect = new Rect(); |
| setHoverScale(1.0f); |
| setHoverAlpha(1.0f); |
| |
| mChildren = new CellLayoutChildren(context); |
| mChildren.setCellDimensions( |
| mCellWidth, mCellHeight, mLeftPadding, mTopPadding, mWidthGap, mHeightGap); |
| addView(mChildren); |
| } |
| |
| private void invalidateBubbleTextView(BubbleTextView icon) { |
| final int padding = icon.getPressedOrFocusedBackgroundPadding(); |
| invalidate(icon.getLeft() - padding, |
| icon.getTop() - padding, |
| icon.getRight() + padding, |
| icon.getBottom() + padding); |
| } |
| |
| void setPressedOrFocusedIcon(BubbleTextView icon) { |
| // We draw the pressed or focused BubbleTextView's background in CellLayout because it |
| // requires an expanded clip rect (due to the glow's blur radius) |
| BubbleTextView oldIcon = mPressedOrFocusedIcon; |
| mPressedOrFocusedIcon = icon; |
| if (oldIcon != null) { |
| invalidateBubbleTextView(oldIcon); |
| } |
| if (mPressedOrFocusedIcon != null) { |
| invalidateBubbleTextView(mPressedOrFocusedIcon); |
| } |
| } |
| |
| public CellLayoutChildren getChildrenLayout() { |
| if (getChildCount() > 0) { |
| return (CellLayoutChildren) getChildAt(0); |
| } |
| return null; |
| } |
| |
| public void setIsDefaultDropTarget(boolean isDefaultDropTarget) { |
| if (mIsDefaultDropTarget != isDefaultDropTarget) { |
| mIsDefaultDropTarget = isDefaultDropTarget; |
| invalidate(); |
| } |
| } |
| |
| void setIsDragOccuring(boolean isDragOccuring) { |
| if (mIsDragOccuring != isDragOccuring) { |
| mIsDragOccuring = isDragOccuring; |
| invalidate(); |
| } |
| } |
| |
| void setIsDragOverlapping(boolean isDragOverlapping) { |
| if (mIsDragOverlapping != isDragOverlapping) { |
| mIsDragOverlapping = isDragOverlapping; |
| invalidate(); |
| } |
| } |
| |
| boolean getIsDragOverlapping() { |
| return mIsDragOverlapping; |
| } |
| |
| private void updateGlowRect() { |
| float marginFraction = (mGlowBackgroundScale - 1.0f) / 2.0f; |
| int marginX = (int) (marginFraction * (mBackgroundRect.right - mBackgroundRect.left)); |
| int marginY = (int) (marginFraction * (mBackgroundRect.bottom - mBackgroundRect.top)); |
| mGlowBackgroundRect.set(mBackgroundRect.left - marginX, mBackgroundRect.top - marginY, |
| mBackgroundRect.right + marginX, mBackgroundRect.bottom + marginY); |
| invalidate(); |
| } |
| |
| public void setHoverScale(float scaleFactor) { |
| if (scaleFactor != mGlowBackgroundScale) { |
| mGlowBackgroundScale = scaleFactor; |
| updateGlowRect(); |
| if (getParent() != null) { |
| ((View) getParent()).invalidate(); |
| } |
| } |
| } |
| |
| public float getHoverScale() { |
| return mGlowBackgroundScale; |
| } |
| |
| public float getHoverAlpha() { |
| return mGlowBackgroundAlpha; |
| } |
| |
| public void setHoverAlpha(float alpha) { |
| mGlowBackgroundAlpha = alpha; |
| invalidate(); |
| } |
| |
| void animateDrop() { |
| if (LauncherApplication.isScreenXLarge()) { |
| Resources res = getResources(); |
| float onDropScale = res.getInteger(R.integer.config_screenOnDropScalePercent) / 100.0f; |
| ObjectAnimator scaleUp = ObjectAnimator.ofFloat(this, "hoverScale", onDropScale); |
| scaleUp.setDuration(res.getInteger(R.integer.config_screenOnDropScaleUpDuration)); |
| ObjectAnimator scaleDown = ObjectAnimator.ofFloat(this, "hoverScale", 1.0f); |
| scaleDown.setDuration(res.getInteger(R.integer.config_screenOnDropScaleDownDuration)); |
| ObjectAnimator alphaFadeOut = ObjectAnimator.ofFloat(this, "hoverAlpha", 0.0f); |
| |
| alphaFadeOut.setStartDelay(res.getInteger(R.integer.config_screenOnDropAlphaFadeDelay)); |
| alphaFadeOut.setDuration(res.getInteger(R.integer.config_screenOnDropAlphaFadeDelay)); |
| |
| AnimatorSet bouncer = new AnimatorSet(); |
| bouncer.play(scaleUp).before(scaleDown); |
| bouncer.play(scaleUp).with(alphaFadeOut); |
| bouncer.addListener(new AnimatorListenerAdapter() { |
| @Override |
| public void onAnimationStart(Animator animation) { |
| setIsDragOverlapping(true); |
| } |
| @Override |
| public void onAnimationEnd(Animator animation) { |
| setIsDragOverlapping(false); |
| setHoverScale(1.0f); |
| setHoverAlpha(1.0f); |
| } |
| }); |
| bouncer.start(); |
| } |
| } |
| |
| @Override |
| protected void onDraw(Canvas canvas) { |
| // When we're large, we are either drawn in a "hover" state (ie when dragging an item to |
| // a neighboring page) or with just a normal background (if backgroundAlpha > 0.0f) |
| // When we're small, we are either drawn normally or in the "accepts drops" state (during |
| // a drag). However, we also drag the mini hover background *over* one of those two |
| // backgrounds |
| if (LauncherApplication.isScreenXLarge() && mBackgroundAlpha > 0.0f) { |
| Drawable bg; |
| boolean mini = getScaleX() < 0.5f; |
| |
| if (mIsDragOverlapping) { |
| // In the mini case, we draw the active_glow bg *over* the active background |
| bg = mini ? mActiveBackgroundMini : mActiveGlowBackground; |
| } else if (mIsDragOccuring && mAcceptsDrops) { |
| bg = mini ? mActiveBackgroundMini : mActiveBackground; |
| } else if (mIsDefaultDropTarget && mini) { |
| bg = mNormalGlowBackgroundMini; |
| } else { |
| bg = mini ? mNormalBackgroundMini : mNormalBackground; |
| } |
| |
| bg.setAlpha((int) (mBackgroundAlpha * mBackgroundAlphaMultiplier * 255)); |
| bg.setBounds(mBackgroundRect); |
| bg.draw(canvas); |
| |
| if (mini && mIsDragOverlapping) { |
| boolean modifiedClipRect = false; |
| if (mGlowBackgroundScale > 1.0f) { |
| // If the hover background's scale is greater than 1, we'll be drawing outside |
| // the bounds of this CellLayout. Get around that by temporarily increasing the |
| // size of the clip rect |
| float marginFraction = (mGlowBackgroundScale - 1.0f) / 2.0f; |
| Rect clipRect = canvas.getClipBounds(); |
| int marginX = (int) (marginFraction * (clipRect.right - clipRect.left)); |
| int marginY = (int) (marginFraction * (clipRect.bottom - clipRect.top)); |
| canvas.save(Canvas.CLIP_SAVE_FLAG); |
| canvas.clipRect(-marginX, -marginY, |
| getWidth() + marginX, getHeight() + marginY, Region.Op.REPLACE); |
| modifiedClipRect = true; |
| } |
| |
| mActiveGlowBackgroundMini.setAlpha( |
| (int) (mBackgroundAlpha * mGlowBackgroundAlpha * 255)); |
| mActiveGlowBackgroundMini.setBounds(mGlowBackgroundRect); |
| mActiveGlowBackgroundMini.draw(canvas); |
| if (modifiedClipRect) { |
| canvas.restore(); |
| } |
| } |
| } |
| |
| if (mCrosshairsVisibility > 0.0f) { |
| final int countX = mCountX; |
| final int countY = mCountY; |
| |
| final float MAX_ALPHA = 0.4f; |
| final int MAX_VISIBLE_DISTANCE = 600; |
| final float DISTANCE_MULTIPLIER = 0.002f; |
| |
| final Drawable d = mCrosshairsDrawable; |
| final int width = d.getIntrinsicWidth(); |
| final int height = d.getIntrinsicHeight(); |
| |
| int x = getLeftPadding() - (mWidthGap / 2) - (width / 2); |
| for (int col = 0; col <= countX; col++) { |
| int y = getTopPadding() - (mHeightGap / 2) - (height / 2); |
| for (int row = 0; row <= countY; row++) { |
| mTmpPointF.set(x - mDragCenter.x, y - mDragCenter.y); |
| float dist = mTmpPointF.length(); |
| // Crosshairs further from the drag point are more faint |
| float alpha = Math.min(MAX_ALPHA, |
| DISTANCE_MULTIPLIER * (MAX_VISIBLE_DISTANCE - dist)); |
| if (alpha > 0.0f) { |
| d.setBounds(x, y, x + width, y + height); |
| d.setAlpha((int) (alpha * 255 * mCrosshairsVisibility)); |
| d.draw(canvas); |
| } |
| y += mCellHeight + mHeightGap; |
| } |
| x += mCellWidth + mWidthGap; |
| } |
| } |
| |
| final Paint paint = mDragOutlinePaint; |
| for (int i = 0; i < mDragOutlines.length; i++) { |
| final float alpha = mDragOutlineAlphas[i]; |
| if (alpha > 0) { |
| final Point p = mDragOutlines[i]; |
| final Bitmap b = (Bitmap) mDragOutlineAnims[i].getTag(); |
| paint.setAlpha((int)(alpha + .5f)); |
| canvas.drawBitmap(b, p.x, p.y, paint); |
| } |
| } |
| |
| // We draw the pressed or focused BubbleTextView's background in CellLayout because it |
| // requires an expanded clip rect (due to the glow's blur radius) |
| if (mPressedOrFocusedIcon != null) { |
| final int padding = mPressedOrFocusedIcon.getPressedOrFocusedBackgroundPadding(); |
| final Bitmap b = mPressedOrFocusedIcon.getPressedOrFocusedBackground(); |
| if (b != null) { |
| canvas.drawBitmap(b, |
| mPressedOrFocusedIcon.getLeft() - padding, |
| mPressedOrFocusedIcon.getTop() - padding, |
| null); |
| } |
| } |
| } |
| |
| @Override |
| public void cancelLongPress() { |
| super.cancelLongPress(); |
| |
| // Cancel long press for all children |
| final int count = getChildCount(); |
| for (int i = 0; i < count; i++) { |
| final View child = getChildAt(i); |
| child.cancelLongPress(); |
| } |
| } |
| |
| public void setOnInterceptTouchListener(View.OnTouchListener listener) { |
| mInterceptTouchListener = listener; |
| } |
| |
| int getCountX() { |
| return mCountX; |
| } |
| |
| int getCountY() { |
| return mCountY; |
| } |
| |
| public boolean addViewToCellLayout( |
| View child, int index, int childId, LayoutParams params, boolean markCells) { |
| final LayoutParams lp = params; |
| |
| // Generate an id for each view, this assumes we have at most 256x256 cells |
| // per workspace screen |
| if (lp.cellX >= 0 && lp.cellX <= mCountX - 1 && lp.cellY >= 0 && lp.cellY <= mCountY - 1) { |
| // If the horizontal or vertical span is set to -1, it is taken to |
| // mean that it spans the extent of the CellLayout |
| if (lp.cellHSpan < 0) lp.cellHSpan = mCountX; |
| if (lp.cellVSpan < 0) lp.cellVSpan = mCountY; |
| |
| child.setId(childId); |
| |
| mChildren.addView(child, index, lp); |
| |
| if (markCells) markCellsAsOccupiedForView(child); |
| |
| return true; |
| } |
| return false; |
| } |
| |
| public void setAcceptsDrops(boolean acceptsDrops) { |
| if (mAcceptsDrops != acceptsDrops) { |
| mAcceptsDrops = acceptsDrops; |
| invalidate(); |
| } |
| } |
| |
| public boolean getAcceptsDrops() { |
| return mAcceptsDrops; |
| } |
| |
| @Override |
| public void removeAllViews() { |
| clearOccupiedCells(); |
| mChildren.removeAllViews(); |
| } |
| |
| @Override |
| public void removeAllViewsInLayout() { |
| clearOccupiedCells(); |
| mChildren.removeAllViewsInLayout(); |
| } |
| |
| public void removeViewWithoutMarkingCells(View view) { |
| mChildren.removeView(view); |
| } |
| |
| @Override |
| public void removeView(View view) { |
| markCellsAsUnoccupiedForView(view); |
| mChildren.removeView(view); |
| } |
| |
| @Override |
| public void removeViewAt(int index) { |
| markCellsAsUnoccupiedForView(mChildren.getChildAt(index)); |
| mChildren.removeViewAt(index); |
| } |
| |
| @Override |
| public void removeViewInLayout(View view) { |
| markCellsAsUnoccupiedForView(view); |
| mChildren.removeViewInLayout(view); |
| } |
| |
| @Override |
| public void removeViews(int start, int count) { |
| for (int i = start; i < start + count; i++) { |
| markCellsAsUnoccupiedForView(mChildren.getChildAt(i)); |
| } |
| mChildren.removeViews(start, count); |
| } |
| |
| @Override |
| public void removeViewsInLayout(int start, int count) { |
| for (int i = start; i < start + count; i++) { |
| markCellsAsUnoccupiedForView(mChildren.getChildAt(i)); |
| } |
| mChildren.removeViewsInLayout(start, count); |
| } |
| |
| public void drawChildren(Canvas canvas) { |
| mChildren.draw(canvas); |
| } |
| |
| void buildChildrenLayer() { |
| mChildren.buildLayer(); |
| } |
| |
| @Override |
| protected void onAttachedToWindow() { |
| super.onAttachedToWindow(); |
| mCellInfo.screen = ((ViewGroup) getParent()).indexOfChild(this); |
| } |
| |
| public void setTagToCellInfoForPoint(int touchX, int touchY) { |
| final CellInfo cellInfo = mCellInfo; |
| final Rect frame = mRect; |
| final int x = touchX + mScrollX; |
| final int y = touchY + mScrollY; |
| final int count = mChildren.getChildCount(); |
| |
| boolean found = false; |
| for (int i = count - 1; i >= 0; i--) { |
| final View child = mChildren.getChildAt(i); |
| final LayoutParams lp = (LayoutParams) child.getLayoutParams(); |
| |
| if ((child.getVisibility() == VISIBLE || child.getAnimation() != null) && |
| lp.isLockedToGrid) { |
| child.getHitRect(frame); |
| if (frame.contains(x, y)) { |
| cellInfo.cell = child; |
| cellInfo.cellX = lp.cellX; |
| cellInfo.cellY = lp.cellY; |
| cellInfo.spanX = lp.cellHSpan; |
| cellInfo.spanY = lp.cellVSpan; |
| cellInfo.valid = true; |
| found = true; |
| break; |
| } |
| } |
| } |
| |
| if (!found) { |
| final int cellXY[] = mTmpCellXY; |
| pointToCellExact(x, y, cellXY); |
| |
| cellInfo.cell = null; |
| cellInfo.cellX = cellXY[0]; |
| cellInfo.cellY = cellXY[1]; |
| cellInfo.spanX = 1; |
| cellInfo.spanY = 1; |
| cellInfo.valid = cellXY[0] >= 0 && cellXY[1] >= 0 && cellXY[0] < mCountX && |
| cellXY[1] < mCountY && !mOccupied[cellXY[0]][cellXY[1]]; |
| } |
| setTag(cellInfo); |
| } |
| |
| @Override |
| public boolean onInterceptTouchEvent(MotionEvent ev) { |
| if (mInterceptTouchListener != null && mInterceptTouchListener.onTouch(this, ev)) { |
| return true; |
| } |
| final int action = ev.getAction(); |
| final CellInfo cellInfo = mCellInfo; |
| |
| if (action == MotionEvent.ACTION_DOWN) { |
| setTagToCellInfoForPoint((int) ev.getX(), (int) ev.getY()); |
| } else if (action == MotionEvent.ACTION_UP) { |
| cellInfo.cell = null; |
| cellInfo.cellX = -1; |
| cellInfo.cellY = -1; |
| cellInfo.spanX = 0; |
| cellInfo.spanY = 0; |
| cellInfo.valid = false; |
| setTag(cellInfo); |
| } |
| |
| return false; |
| } |
| |
| @Override |
| public CellInfo getTag() { |
| return (CellInfo) super.getTag(); |
| } |
| |
| /** |
| * Given a point, return the cell that strictly encloses that point |
| * @param x X coordinate of the point |
| * @param y Y coordinate of the point |
| * @param result Array of 2 ints to hold the x and y coordinate of the cell |
| */ |
| void pointToCellExact(int x, int y, int[] result) { |
| final int hStartPadding = getLeftPadding(); |
| final int vStartPadding = getTopPadding(); |
| |
| result[0] = (x - hStartPadding) / (mCellWidth + mWidthGap); |
| result[1] = (y - vStartPadding) / (mCellHeight + mHeightGap); |
| |
| final int xAxis = mCountX; |
| final int yAxis = mCountY; |
| |
| if (result[0] < 0) result[0] = 0; |
| if (result[0] >= xAxis) result[0] = xAxis - 1; |
| if (result[1] < 0) result[1] = 0; |
| if (result[1] >= yAxis) result[1] = yAxis - 1; |
| } |
| |
| /** |
| * Given a point, return the cell that most closely encloses that point |
| * @param x X coordinate of the point |
| * @param y Y coordinate of the point |
| * @param result Array of 2 ints to hold the x and y coordinate of the cell |
| */ |
| void pointToCellRounded(int x, int y, int[] result) { |
| pointToCellExact(x + (mCellWidth / 2), y + (mCellHeight / 2), result); |
| } |
| |
| /** |
| * Given a cell coordinate, return the point that represents the upper left corner of that cell |
| * |
| * @param cellX X coordinate of the cell |
| * @param cellY Y coordinate of the cell |
| * |
| * @param result Array of 2 ints to hold the x and y coordinate of the point |
| */ |
| void cellToPoint(int cellX, int cellY, int[] result) { |
| final int hStartPadding = getLeftPadding(); |
| final int vStartPadding = getTopPadding(); |
| |
| result[0] = hStartPadding + cellX * (mCellWidth + mWidthGap); |
| result[1] = vStartPadding + cellY * (mCellHeight + mHeightGap); |
| } |
| |
| /** |
| * Given a cell coordinate, return the point that represents the upper left corner of that cell |
| * |
| * @param cellX X coordinate of the cell |
| * @param cellY Y coordinate of the cell |
| * |
| * @param result Array of 2 ints to hold the x and y coordinate of the point |
| */ |
| void cellToCenterPoint(int cellX, int cellY, int[] result) { |
| final int hStartPadding = getLeftPadding(); |
| final int vStartPadding = getTopPadding(); |
| |
| result[0] = hStartPadding + cellX * (mCellWidth + mWidthGap) + mCellWidth / 2; |
| result[1] = vStartPadding + cellY * (mCellHeight + mHeightGap) + mCellHeight / 2; |
| } |
| |
| int getCellWidth() { |
| return mCellWidth; |
| } |
| |
| int getCellHeight() { |
| return mCellHeight; |
| } |
| |
| int getWidthGap() { |
| return mWidthGap; |
| } |
| |
| int getHeightGap() { |
| return mHeightGap; |
| } |
| |
| int getLeftPadding() { |
| return mLeftPadding; |
| } |
| |
| int getTopPadding() { |
| return mTopPadding; |
| } |
| |
| int getRightPadding() { |
| return mRightPadding; |
| } |
| |
| int getBottomPadding() { |
| return mBottomPadding; |
| } |
| |
| @Override |
| protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { |
| // TODO: currently ignoring padding |
| |
| int widthSpecMode = MeasureSpec.getMode(widthMeasureSpec); |
| int widthSpecSize = MeasureSpec.getSize(widthMeasureSpec); |
| |
| int heightSpecMode = MeasureSpec.getMode(heightMeasureSpec); |
| int heightSpecSize = MeasureSpec.getSize(heightMeasureSpec); |
| |
| if (widthSpecMode == MeasureSpec.UNSPECIFIED || heightSpecMode == MeasureSpec.UNSPECIFIED) { |
| throw new RuntimeException("CellLayout cannot have UNSPECIFIED dimensions"); |
| } |
| |
| final int cellWidth = mCellWidth; |
| final int cellHeight = mCellHeight; |
| |
| int numWidthGaps = mCountX - 1; |
| int numHeightGaps = mCountY - 1; |
| |
| if (mWidthGap < 0 || mHeightGap < 0) { |
| int vSpaceLeft = heightSpecSize - mTopPadding - mBottomPadding - (cellHeight * mCountY); |
| mHeightGap = vSpaceLeft / numHeightGaps; |
| |
| int hSpaceLeft = widthSpecSize - mLeftPadding - mRightPadding - (cellWidth * mCountX); |
| mWidthGap = hSpaceLeft / numWidthGaps; |
| |
| // center it around the min gaps |
| int minGap = Math.min(mWidthGap, mHeightGap); |
| mWidthGap = mHeightGap = minGap; |
| } |
| |
| // Initial values correspond to widthSpecMode == MeasureSpec.EXACTLY |
| int newWidth = widthSpecSize; |
| int newHeight = heightSpecSize; |
| if (widthSpecMode == MeasureSpec.AT_MOST) { |
| newWidth = mLeftPadding + mRightPadding + (mCountX * cellWidth) + |
| ((mCountX - 1) * mWidthGap); |
| newHeight = mTopPadding + mBottomPadding + (mCountY * cellHeight) + |
| ((mCountY - 1) * mHeightGap); |
| setMeasuredDimension(newWidth, newHeight); |
| } |
| |
| int count = getChildCount(); |
| for (int i = 0; i < count; i++) { |
| View child = getChildAt(i); |
| int childWidthMeasureSpec = MeasureSpec.makeMeasureSpec(newWidth, MeasureSpec.EXACTLY); |
| int childheightMeasureSpec = MeasureSpec.makeMeasureSpec(newHeight, |
| MeasureSpec.EXACTLY); |
| child.measure(childWidthMeasureSpec, childheightMeasureSpec); |
| } |
| setMeasuredDimension(newWidth, newHeight); |
| } |
| |
| @Override |
| protected void onLayout(boolean changed, int l, int t, int r, int b) { |
| int count = getChildCount(); |
| for (int i = 0; i < count; i++) { |
| View child = getChildAt(i); |
| child.layout(0, 0, r - l, b - t); |
| } |
| } |
| |
| @Override |
| protected void onSizeChanged(int w, int h, int oldw, int oldh) { |
| super.onSizeChanged(w, h, oldw, oldh); |
| mBackgroundRect.set(0, 0, w, h); |
| updateGlowRect(); |
| } |
| |
| @Override |
| protected void setChildrenDrawingCacheEnabled(boolean enabled) { |
| mChildren.setChildrenDrawingCacheEnabled(enabled); |
| } |
| |
| @Override |
| protected void setChildrenDrawnWithCacheEnabled(boolean enabled) { |
| mChildren.setChildrenDrawnWithCacheEnabled(enabled); |
| } |
| |
| public float getBackgroundAlpha() { |
| return mBackgroundAlpha; |
| } |
| |
| public void setFastBackgroundAlpha(float alpha) { |
| mBackgroundAlpha = alpha; |
| } |
| |
| public void setBackgroundAlphaMultiplier(float multiplier) { |
| mBackgroundAlphaMultiplier = multiplier; |
| } |
| |
| public float getBackgroundAlphaMultiplier() { |
| return mBackgroundAlphaMultiplier; |
| } |
| |
| public void setBackgroundAlpha(float alpha) { |
| mBackgroundAlpha = alpha; |
| invalidate(); |
| } |
| |
| // Need to return true to let the view system know we know how to handle alpha-- this is |
| // because when our children have an alpha of 0.0f, they are still rendering their "dimmed" |
| // versions |
| @Override |
| protected boolean onSetAlpha(int alpha) { |
| return true; |
| } |
| |
| public void setAlpha(float alpha) { |
| setChildrenAlpha(alpha); |
| super.setAlpha(alpha); |
| } |
| |
| public void setFastAlpha(float alpha) { |
| setFastChildrenAlpha(alpha); |
| super.setFastAlpha(alpha); |
| } |
| |
| private void setChildrenAlpha(float alpha) { |
| final int childCount = getChildCount(); |
| for (int i = 0; i < childCount; i++) { |
| getChildAt(i).setAlpha(alpha); |
| } |
| } |
| |
| private void setFastChildrenAlpha(float alpha) { |
| final int childCount = getChildCount(); |
| for (int i = 0; i < childCount; i++) { |
| getChildAt(i).setFastAlpha(alpha); |
| } |
| } |
| |
| public View getChildAt(int x, int y) { |
| return mChildren.getChildAt(x, y); |
| } |
| |
| /** |
| * Estimate where the top left cell of the dragged item will land if it is dropped. |
| * |
| * @param originX The X value of the top left corner of the item |
| * @param originY The Y value of the top left corner of the item |
| * @param spanX The number of horizontal cells that the item spans |
| * @param spanY The number of vertical cells that the item spans |
| * @param result The estimated drop cell X and Y. |
| */ |
| void estimateDropCell(int originX, int originY, int spanX, int spanY, int[] result) { |
| final int countX = mCountX; |
| final int countY = mCountY; |
| |
| // pointToCellRounded takes the top left of a cell but will pad that with |
| // cellWidth/2 and cellHeight/2 when finding the matching cell |
| pointToCellRounded(originX, originY, result); |
| |
| // If the item isn't fully on this screen, snap to the edges |
| int rightOverhang = result[0] + spanX - countX; |
| if (rightOverhang > 0) { |
| result[0] -= rightOverhang; // Snap to right |
| } |
| result[0] = Math.max(0, result[0]); // Snap to left |
| int bottomOverhang = result[1] + spanY - countY; |
| if (bottomOverhang > 0) { |
| result[1] -= bottomOverhang; // Snap to bottom |
| } |
| result[1] = Math.max(0, result[1]); // Snap to top |
| } |
| |
| void visualizeDropLocation( |
| View v, Bitmap dragOutline, int originX, int originY, int spanX, int spanY) { |
| |
| final int oldDragCellX = mDragCell[0]; |
| final int oldDragCellY = mDragCell[1]; |
| final int[] nearest = findNearestVacantArea(originX, originY, spanX, spanY, v, mDragCell); |
| if (v != null) { |
| mDragCenter.set(originX + (v.getWidth() / 2), originY + (v.getHeight() / 2)); |
| } else { |
| mDragCenter.set(originX, originY); |
| } |
| |
| if (nearest != null && (nearest[0] != oldDragCellX || nearest[1] != oldDragCellY)) { |
| // Find the top left corner of the rect the object will occupy |
| final int[] topLeft = mTmpPoint; |
| cellToPoint(nearest[0], nearest[1], topLeft); |
| |
| int left = topLeft[0]; |
| int top = topLeft[1]; |
| |
| if (v != null) { |
| // When drawing the drag outline, it did not account for margin offsets |
| // added by the view's parent. |
| MarginLayoutParams lp = (MarginLayoutParams) v.getLayoutParams(); |
| left += lp.leftMargin; |
| top += lp.topMargin; |
| |
| // Offsets due to the size difference between the View and the dragOutline. |
| // There is a size difference to account for the outer blur, which may lie |
| // outside the bounds of the view. |
| left += (v.getWidth() - dragOutline.getWidth()) / 2; |
| top += (v.getHeight() - dragOutline.getHeight()) / 2; |
| } else { |
| // Center the drag outline in the cell |
| left += (mCellWidth - dragOutline.getWidth()) / 2; |
| top += (mCellHeight - dragOutline.getHeight()) / 2; |
| } |
| |
| final int oldIndex = mDragOutlineCurrent; |
| mDragOutlineAnims[oldIndex].animateOut(); |
| mDragOutlineCurrent = (oldIndex + 1) % mDragOutlines.length; |
| |
| mDragOutlines[mDragOutlineCurrent].set(left, top); |
| mDragOutlineAnims[mDragOutlineCurrent].setTag(dragOutline); |
| mDragOutlineAnims[mDragOutlineCurrent].animateIn(); |
| } |
| |
| // If we are drawing crosshairs, the entire CellLayout needs to be invalidated |
| if (mCrosshairsDrawable != null) { |
| invalidate(); |
| } |
| } |
| |
| public void clearDragOutlines() { |
| final int oldIndex = mDragOutlineCurrent; |
| mDragOutlineAnims[oldIndex].animateOut(); |
| mDragCell[0] = -1; |
| mDragCell[1] = -1; |
| } |
| |
| /** |
| * Find a vacant area that will fit the given bounds nearest the requested |
| * cell location. Uses Euclidean distance to score multiple vacant areas. |
| * |
| * @param pixelX The X location at which you want to search for a vacant area. |
| * @param pixelY The Y location at which you want to search for a vacant area. |
| * @param spanX Horizontal span of the object. |
| * @param spanY Vertical span of the object. |
| * @param result Array in which to place the result, or null (in which case a new array will |
| * be allocated) |
| * @return The X, Y cell of a vacant area that can contain this object, |
| * nearest the requested location. |
| */ |
| int[] findNearestVacantArea( |
| int pixelX, int pixelY, int spanX, int spanY, int[] result) { |
| return findNearestVacantArea(pixelX, pixelY, spanX, spanY, null, result); |
| } |
| |
| /** |
| * Find a vacant area that will fit the given bounds nearest the requested |
| * cell location. Uses Euclidean distance to score multiple vacant areas. |
| * |
| * @param pixelX The X location at which you want to search for a vacant area. |
| * @param pixelY The Y location at which you want to search for a vacant area. |
| * @param spanX Horizontal span of the object. |
| * @param spanY Vertical span of the object. |
| * @param ignoreOccupied If true, the result can be an occupied cell |
| * @param result Array in which to place the result, or null (in which case a new array will |
| * be allocated) |
| * @return The X, Y cell of a vacant area that can contain this object, |
| * nearest the requested location. |
| */ |
| int[] findNearestArea(int pixelX, int pixelY, int spanX, int spanY, View ignoreView, |
| boolean ignoreOccupied, int[] result) { |
| // mark space take by ignoreView as available (method checks if ignoreView is null) |
| markCellsAsUnoccupiedForView(ignoreView); |
| |
| // For items with a spanX / spanY > 1, the passed in point (pixelX, pixelY) corresponds |
| // to the center of the item, but we are searching based on the top-left cell, so |
| // we translate the point over to correspond to the top-left. |
| pixelX -= (mCellWidth + mWidthGap) * (spanX - 1) / 2f; |
| pixelY -= (mCellHeight + mHeightGap) * (spanY - 1) / 2f; |
| |
| // Keep track of best-scoring drop area |
| final int[] bestXY = result != null ? result : new int[2]; |
| double bestDistance = Double.MAX_VALUE; |
| |
| final int countX = mCountX; |
| final int countY = mCountY; |
| final boolean[][] occupied = mOccupied; |
| |
| for (int y = 0; y < countY - (spanY - 1); y++) { |
| inner: |
| for (int x = 0; x < countX - (spanX - 1); x++) { |
| if (ignoreOccupied) { |
| for (int i = 0; i < spanX; i++) { |
| for (int j = 0; j < spanY; j++) { |
| if (occupied[x + i][y + j]) { |
| // small optimization: we can skip to after the column we |
| // just found an occupied cell |
| x += i; |
| continue inner; |
| } |
| } |
| } |
| } |
| final int[] cellXY = mTmpCellXY; |
| cellToCenterPoint(x, y, cellXY); |
| |
| double distance = Math.sqrt(Math.pow(cellXY[0] - pixelX, 2) |
| + Math.pow(cellXY[1] - pixelY, 2)); |
| if (distance <= bestDistance) { |
| bestDistance = distance; |
| bestXY[0] = x; |
| bestXY[1] = y; |
| } |
| } |
| } |
| // re-mark space taken by ignoreView as occupied |
| markCellsAsOccupiedForView(ignoreView); |
| |
| // Return null if no suitable location found |
| if (bestDistance < Double.MAX_VALUE) { |
| return bestXY; |
| } else { |
| return null; |
| } |
| } |
| |
| /** |
| * Find a vacant area that will fit the given bounds nearest the requested |
| * cell location. Uses Euclidean distance to score multiple vacant areas. |
| * |
| * @param pixelX The X location at which you want to search for a vacant area. |
| * @param pixelY The Y location at which you want to search for a vacant area. |
| * @param spanX Horizontal span of the object. |
| * @param spanY Vertical span of the object. |
| * @param ignoreView Considers space occupied by this view as unoccupied |
| * @param result Previously returned value to possibly recycle. |
| * @return The X, Y cell of a vacant area that can contain this object, |
| * nearest the requested location. |
| */ |
| int[] findNearestVacantArea( |
| int pixelX, int pixelY, int spanX, int spanY, View ignoreView, int[] result) { |
| return findNearestArea(pixelX, pixelY, spanX, spanY, ignoreView, true, result); |
| } |
| |
| /** |
| * Find a starting cell position that will fit the given bounds nearest the requested |
| * cell location. Uses Euclidean distance to score multiple vacant areas. |
| * |
| * @param pixelX The X location at which you want to search for a vacant area. |
| * @param pixelY The Y location at which you want to search for a vacant area. |
| * @param spanX Horizontal span of the object. |
| * @param spanY Vertical span of the object. |
| * @param ignoreView Considers space occupied by this view as unoccupied |
| * @param result Previously returned value to possibly recycle. |
| * @return The X, Y cell of a vacant area that can contain this object, |
| * nearest the requested location. |
| */ |
| int[] findNearestArea( |
| int pixelX, int pixelY, int spanX, int spanY, int[] result) { |
| return findNearestArea(pixelX, pixelY, spanX, spanY, null, false, result); |
| } |
| |
| boolean existsEmptyCell() { |
| return findCellForSpan(null, 1, 1); |
| } |
| |
| /** |
| * Finds the upper-left coordinate of the first rectangle in the grid that can |
| * hold a cell of the specified dimensions. If intersectX and intersectY are not -1, |
| * then this method will only return coordinates for rectangles that contain the cell |
| * (intersectX, intersectY) |
| * |
| * @param cellXY The array that will contain the position of a vacant cell if such a cell |
| * can be found. |
| * @param spanX The horizontal span of the cell we want to find. |
| * @param spanY The vertical span of the cell we want to find. |
| * |
| * @return True if a vacant cell of the specified dimension was found, false otherwise. |
| */ |
| boolean findCellForSpan(int[] cellXY, int spanX, int spanY) { |
| return findCellForSpanThatIntersectsIgnoring(cellXY, spanX, spanY, -1, -1, null); |
| } |
| |
| /** |
| * Like above, but ignores any cells occupied by the item "ignoreView" |
| * |
| * @param cellXY The array that will contain the position of a vacant cell if such a cell |
| * can be found. |
| * @param spanX The horizontal span of the cell we want to find. |
| * @param spanY The vertical span of the cell we want to find. |
| * @param ignoreView The home screen item we should treat as not occupying any space |
| * @return |
| */ |
| boolean findCellForSpanIgnoring(int[] cellXY, int spanX, int spanY, View ignoreView) { |
| return findCellForSpanThatIntersectsIgnoring(cellXY, spanX, spanY, -1, -1, ignoreView); |
| } |
| |
| /** |
| * Like above, but if intersectX and intersectY are not -1, then this method will try to |
| * return coordinates for rectangles that contain the cell [intersectX, intersectY] |
| * |
| * @param spanX The horizontal span of the cell we want to find. |
| * @param spanY The vertical span of the cell we want to find. |
| * @param ignoreView The home screen item we should treat as not occupying any space |
| * @param intersectX The X coordinate of the cell that we should try to overlap |
| * @param intersectX The Y coordinate of the cell that we should try to overlap |
| * |
| * @return True if a vacant cell of the specified dimension was found, false otherwise. |
| */ |
| boolean findCellForSpanThatIntersects(int[] cellXY, int spanX, int spanY, |
| int intersectX, int intersectY) { |
| return findCellForSpanThatIntersectsIgnoring( |
| cellXY, spanX, spanY, intersectX, intersectY, null); |
| } |
| |
| /** |
| * The superset of the above two methods |
| */ |
| boolean findCellForSpanThatIntersectsIgnoring(int[] cellXY, int spanX, int spanY, |
| int intersectX, int intersectY, View ignoreView) { |
| // mark space take by ignoreView as available (method checks if ignoreView is null) |
| markCellsAsUnoccupiedForView(ignoreView); |
| |
| boolean foundCell = false; |
| while (true) { |
| int startX = 0; |
| if (intersectX >= 0) { |
| startX = Math.max(startX, intersectX - (spanX - 1)); |
| } |
| int endX = mCountX - (spanX - 1); |
| if (intersectX >= 0) { |
| endX = Math.min(endX, intersectX + (spanX - 1) + (spanX == 1 ? 1 : 0)); |
| } |
| int startY = 0; |
| if (intersectY >= 0) { |
| startY = Math.max(startY, intersectY - (spanY - 1)); |
| } |
| int endY = mCountY - (spanY - 1); |
| if (intersectY >= 0) { |
| endY = Math.min(endY, intersectY + (spanY - 1) + (spanY == 1 ? 1 : 0)); |
| } |
| |
| for (int y = startY; y < endY && !foundCell; y++) { |
| inner: |
| for (int x = startX; x < endX; x++) { |
| for (int i = 0; i < spanX; i++) { |
| for (int j = 0; j < spanY; j++) { |
| if (mOccupied[x + i][y + j]) { |
| // small optimization: we can skip to after the column we just found |
| // an occupied cell |
| x += i; |
| continue inner; |
| } |
| } |
| } |
| if (cellXY != null) { |
| cellXY[0] = x; |
| cellXY[1] = y; |
| } |
| foundCell = true; |
| break; |
| } |
| } |
| if (intersectX == -1 && intersectY == -1) { |
| break; |
| } else { |
| // if we failed to find anything, try again but without any requirements of |
| // intersecting |
| intersectX = -1; |
| intersectY = -1; |
| continue; |
| } |
| } |
| |
| // re-mark space taken by ignoreView as occupied |
| markCellsAsOccupiedForView(ignoreView); |
| return foundCell; |
| } |
| |
| /** |
| * Called when drag has left this CellLayout or has been completed (successfully or not) |
| */ |
| void onDragExit() { |
| // This can actually be called when we aren't in a drag, e.g. when adding a new |
| // item to this layout via the customize drawer. |
| // Guard against that case. |
| if (mDragging) { |
| mDragging = false; |
| |
| // Fade out the drag indicators |
| if (mCrosshairsAnimator != null) { |
| mCrosshairsAnimator.animateOut(); |
| } |
| } |
| |
| // Invalidate the drag data |
| mDragCell[0] = -1; |
| mDragCell[1] = -1; |
| mDragOutlineAnims[mDragOutlineCurrent].animateOut(); |
| mDragOutlineCurrent = (mDragOutlineCurrent + 1) % mDragOutlineAnims.length; |
| |
| setIsDragOverlapping(false); |
| } |
| |
| /** |
| * Mark a child as having been dropped. |
| * At the beginning of the drag operation, the child may have been on another |
| * screen, but it is re-parented before this method is called. |
| * |
| * @param child The child that is being dropped |
| */ |
| void onDropChild(View child, boolean animate) { |
| if (child != null) { |
| LayoutParams lp = (LayoutParams) child.getLayoutParams(); |
| lp.isDragging = false; |
| lp.dropped = true; |
| lp.animateDrop = animate; |
| child.setVisibility(animate ? View.INVISIBLE : View.VISIBLE); |
| child.requestLayout(); |
| } |
| } |
| |
| /** |
| * Start dragging the specified child |
| * |
| * @param child The child that is being dragged |
| */ |
| void onDragChild(View child) { |
| LayoutParams lp = (LayoutParams) child.getLayoutParams(); |
| lp.isDragging = true; |
| } |
| |
| /** |
| * A drag event has begun over this layout. |
| * It may have begun over this layout (in which case onDragChild is called first), |
| * or it may have begun on another layout. |
| */ |
| void onDragEnter() { |
| if (!mDragging) { |
| // Fade in the drag indicators |
| if (mCrosshairsAnimator != null) { |
| mCrosshairsAnimator.animateIn(); |
| } |
| } |
| mDragging = true; |
| } |
| |
| /** |
| * Computes a bounding rectangle for a range of cells |
| * |
| * @param cellX X coordinate of upper left corner expressed as a cell position |
| * @param cellY Y coordinate of upper left corner expressed as a cell position |
| * @param cellHSpan Width in cells |
| * @param cellVSpan Height in cells |
| * @param resultRect Rect into which to put the results |
| */ |
| public void cellToRect(int cellX, int cellY, int cellHSpan, int cellVSpan, RectF resultRect) { |
| final int cellWidth = mCellWidth; |
| final int cellHeight = mCellHeight; |
| final int widthGap = mWidthGap; |
| final int heightGap = mHeightGap; |
| |
| final int hStartPadding = getLeftPadding(); |
| final int vStartPadding = getTopPadding(); |
| |
| int width = cellHSpan * cellWidth + ((cellHSpan - 1) * widthGap); |
| int height = cellVSpan * cellHeight + ((cellVSpan - 1) * heightGap); |
| |
| int x = hStartPadding + cellX * (cellWidth + widthGap); |
| int y = vStartPadding + cellY * (cellHeight + heightGap); |
| |
| resultRect.set(x, y, x + width, y + height); |
| } |
| |
| /** |
| * Computes the required horizontal and vertical cell spans to always |
| * fit the given rectangle. |
| * |
| * @param width Width in pixels |
| * @param height Height in pixels |
| * @param result An array of length 2 in which to store the result (may be null). |
| */ |
| public int[] rectToCell(int width, int height, int[] result) { |
| return rectToCell(getResources(), width, height, result); |
| } |
| |
| public static int[] rectToCell(Resources resources, int width, int height, int[] result) { |
| // Always assume we're working with the smallest span to make sure we |
| // reserve enough space in both orientations. |
| int actualWidth = resources.getDimensionPixelSize(R.dimen.workspace_cell_width); |
| int actualHeight = resources.getDimensionPixelSize(R.dimen.workspace_cell_height); |
| int smallerSize = Math.min(actualWidth, actualHeight); |
| |
| // Always round up to next largest cell |
| int spanX = (width + smallerSize) / smallerSize; |
| int spanY = (height + smallerSize) / smallerSize; |
| |
| if (result == null) { |
| return new int[] { spanX, spanY }; |
| } |
| result[0] = spanX; |
| result[1] = spanY; |
| return result; |
| } |
| |
| public int[] cellSpansToSize(int hSpans, int vSpans) { |
| int[] size = new int[2]; |
| size[0] = hSpans * mCellWidth + (hSpans - 1) * mWidthGap; |
| size[1] = vSpans * mCellHeight + (vSpans - 1) * mHeightGap; |
| return size; |
| } |
| |
| /** |
| * Calculate the grid spans needed to fit given item |
| */ |
| public void calculateSpans(ItemInfo info) { |
| final int minWidth; |
| final int minHeight; |
| |
| if (info instanceof LauncherAppWidgetInfo) { |
| minWidth = ((LauncherAppWidgetInfo) info).minWidth; |
| minHeight = ((LauncherAppWidgetInfo) info).minHeight; |
| } else if (info instanceof PendingAddWidgetInfo) { |
| minWidth = ((PendingAddWidgetInfo) info).minWidth; |
| minHeight = ((PendingAddWidgetInfo) info).minHeight; |
| } else { |
| // It's not a widget, so it must be 1x1 |
| info.spanX = info.spanY = 1; |
| return; |
| } |
| int[] spans = rectToCell(minWidth, minHeight, null); |
| info.spanX = spans[0]; |
| info.spanY = spans[1]; |
| } |
| |
| /** |
| * Find the first vacant cell, if there is one. |
| * |
| * @param vacant Holds the x and y coordinate of the vacant cell |
| * @param spanX Horizontal cell span. |
| * @param spanY Vertical cell span. |
| * |
| * @return True if a vacant cell was found |
| */ |
| public boolean getVacantCell(int[] vacant, int spanX, int spanY) { |
| |
| return findVacantCell(vacant, spanX, spanY, mCountX, mCountY, mOccupied); |
| } |
| |
| static boolean findVacantCell(int[] vacant, int spanX, int spanY, |
| int xCount, int yCount, boolean[][] occupied) { |
| |
| for (int x = 0; x < xCount; x++) { |
| for (int y = 0; y < yCount; y++) { |
| boolean available = !occupied[x][y]; |
| out: for (int i = x; i < x + spanX - 1 && x < xCount; i++) { |
| for (int j = y; j < y + spanY - 1 && y < yCount; j++) { |
| available = available && !occupied[i][j]; |
| if (!available) break out; |
| } |
| } |
| |
| if (available) { |
| vacant[0] = x; |
| vacant[1] = y; |
| return true; |
| } |
| } |
| } |
| |
| return false; |
| } |
| |
| private void clearOccupiedCells() { |
| for (int x = 0; x < mCountX; x++) { |
| for (int y = 0; y < mCountY; y++) { |
| mOccupied[x][y] = false; |
| } |
| } |
| } |
| |
| /** |
| * Given a view, determines how much that view can be expanded in all directions, in terms of |
| * whether or not there are other items occupying adjacent cells. Used by the |
| * AppWidgetResizeFrame to determine how the widget can be resized. |
| */ |
| public void getExpandabilityArrayForView(View view, int[] expandability) { |
| final LayoutParams lp = (LayoutParams) view.getLayoutParams(); |
| boolean flag; |
| |
| expandability[AppWidgetResizeFrame.LEFT] = 0; |
| for (int x = lp.cellX - 1; x >= 0; x--) { |
| flag = false; |
| for (int y = lp.cellY; y < lp.cellY + lp.cellVSpan; y++) { |
| if (mOccupied[x][y]) flag = true; |
| } |
| if (flag) break; |
| expandability[AppWidgetResizeFrame.LEFT]++; |
| } |
| |
| expandability[AppWidgetResizeFrame.TOP] = 0; |
| for (int y = lp.cellY - 1; y >= 0; y--) { |
| flag = false; |
| for (int x = lp.cellX; x < lp.cellX + lp.cellHSpan; x++) { |
| if (mOccupied[x][y]) flag = true; |
| } |
| if (flag) break; |
| expandability[AppWidgetResizeFrame.TOP]++; |
| } |
| |
| expandability[AppWidgetResizeFrame.RIGHT] = 0; |
| for (int x = lp.cellX + lp.cellHSpan; x < mCountX; x++) { |
| flag = false; |
| for (int y = lp.cellY; y < lp.cellY + lp.cellVSpan; y++) { |
| if (mOccupied[x][y]) flag = true; |
| } |
| if (flag) break; |
| expandability[AppWidgetResizeFrame.RIGHT]++; |
| } |
| |
| expandability[AppWidgetResizeFrame.BOTTOM] = 0; |
| for (int y = lp.cellY + lp.cellVSpan; y < mCountY; y++) { |
| flag = false; |
| for (int x = lp.cellX; x < lp.cellX + lp.cellHSpan; x++) { |
| if (mOccupied[x][y]) flag = true; |
| } |
| if (flag) break; |
| expandability[AppWidgetResizeFrame.BOTTOM]++; |
| } |
| } |
| |
| public void onMove(View view, int newCellX, int newCellY) { |
| LayoutParams lp = (LayoutParams) view.getLayoutParams(); |
| markCellsAsUnoccupiedForView(view); |
| markCellsForView(newCellX, newCellY, lp.cellHSpan, lp.cellVSpan, true); |
| } |
| |
| public void markCellsAsOccupiedForView(View view) { |
| if (view == null || view.getParent() != mChildren) return; |
| LayoutParams lp = (LayoutParams) view.getLayoutParams(); |
| markCellsForView(lp.cellX, lp.cellY, lp.cellHSpan, lp.cellVSpan, true); |
| } |
| |
| public void markCellsAsUnoccupiedForView(View view) { |
| if (view == null || view.getParent() != mChildren) return; |
| LayoutParams lp = (LayoutParams) view.getLayoutParams(); |
| markCellsForView(lp.cellX, lp.cellY, lp.cellHSpan, lp.cellVSpan, false); |
| } |
| |
| private void markCellsForView(int cellX, int cellY, int spanX, int spanY, boolean value) { |
| for (int x = cellX; x < cellX + spanX && x < mCountX; x++) { |
| for (int y = cellY; y < cellY + spanY && y < mCountY; y++) { |
| mOccupied[x][y] = value; |
| } |
| } |
| } |
| |
| public boolean isOccupied(int x, int y) { |
| if (x < mCountX && y < mCountY) { |
| return mOccupied[x][y]; |
| } else { |
| throw new RuntimeException("Position exceeds the bound of this CellLayout"); |
| } |
| } |
| |
| @Override |
| public ViewGroup.LayoutParams generateLayoutParams(AttributeSet attrs) { |
| return new CellLayout.LayoutParams(getContext(), attrs); |
| } |
| |
| @Override |
| protected boolean checkLayoutParams(ViewGroup.LayoutParams p) { |
| return p instanceof CellLayout.LayoutParams; |
| } |
| |
| @Override |
| protected ViewGroup.LayoutParams generateLayoutParams(ViewGroup.LayoutParams p) { |
| return new CellLayout.LayoutParams(p); |
| } |
| |
| public static class CellLayoutAnimationController extends LayoutAnimationController { |
| public CellLayoutAnimationController(Animation animation, float delay) { |
| super(animation, delay); |
| } |
| |
| @Override |
| protected long getDelayForView(View view) { |
| return (int) (Math.random() * 150); |
| } |
| } |
| |
| public static class LayoutParams extends ViewGroup.MarginLayoutParams { |
| /** |
| * Horizontal location of the item in the grid. |
| */ |
| @ViewDebug.ExportedProperty |
| public int cellX; |
| |
| /** |
| * Vertical location of the item in the grid. |
| */ |
| @ViewDebug.ExportedProperty |
| public int cellY; |
| |
| /** |
| * Number of cells spanned horizontally by the item. |
| */ |
| @ViewDebug.ExportedProperty |
| public int cellHSpan; |
| |
| /** |
| * Number of cells spanned vertically by the item. |
| */ |
| @ViewDebug.ExportedProperty |
| public int cellVSpan; |
| |
| /** |
| * Indicates whether the item will set its x, y, width and height parameters freely, |
| * or whether these will be computed based on cellX, cellY, cellHSpan and cellVSpan. |
| */ |
| public boolean isLockedToGrid = true; |
| |
| /** |
| * Is this item currently being dragged |
| */ |
| public boolean isDragging; |
| |
| // X coordinate of the view in the layout. |
| @ViewDebug.ExportedProperty |
| int x; |
| // Y coordinate of the view in the layout. |
| @ViewDebug.ExportedProperty |
| int y; |
| |
| /** |
| * The old X coordinate of this item, relative to its current parent. |
| * Used to animate the item into its new position. |
| */ |
| int oldX; |
| |
| /** |
| * The old Y coordinate of this item, relative to its current parent. |
| * Used to animate the item into its new position. |
| */ |
| int oldY; |
| |
| boolean dropped; |
| |
| boolean animateDrop; |
| |
| public LayoutParams(Context c, AttributeSet attrs) { |
| super(c, attrs); |
| cellHSpan = 1; |
| cellVSpan = 1; |
| } |
| |
| public LayoutParams(ViewGroup.LayoutParams source) { |
| super(source); |
| cellHSpan = 1; |
| cellVSpan = 1; |
| } |
| |
| public LayoutParams(LayoutParams source) { |
| super(source); |
| this.cellX = source.cellX; |
| this.cellY = source.cellY; |
| this.cellHSpan = source.cellHSpan; |
| this.cellVSpan = source.cellVSpan; |
| } |
| |
| public LayoutParams(int cellX, int cellY, int cellHSpan, int cellVSpan) { |
| super(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT); |
| this.cellX = cellX; |
| this.cellY = cellY; |
| this.cellHSpan = cellHSpan; |
| this.cellVSpan = cellVSpan; |
| } |
| |
| public void setup(int cellWidth, int cellHeight, int widthGap, int heightGap, |
| int hStartPadding, int vStartPadding) { |
| if (isLockedToGrid) { |
| final int myCellHSpan = cellHSpan; |
| final int myCellVSpan = cellVSpan; |
| final int myCellX = cellX; |
| final int myCellY = cellY; |
| |
| width = myCellHSpan * cellWidth + ((myCellHSpan - 1) * widthGap) - |
| leftMargin - rightMargin; |
| height = myCellVSpan * cellHeight + ((myCellVSpan - 1) * heightGap) - |
| topMargin - bottomMargin; |
| x = hStartPadding + myCellX * (cellWidth + widthGap) + leftMargin; |
| y = vStartPadding + myCellY * (cellHeight + heightGap) + topMargin; |
| } |
| } |
| |
| public String toString() { |
| return "(" + this.cellX + ", " + this.cellY + ")"; |
| } |
| } |
| |
| // This class stores info for two purposes: |
| // 1. When dragging items (mDragInfo in Workspace), we store the View, its cellX & cellY, |
| // its spanX, spanY, and the screen it is on |
| // 2. When long clicking on an empty cell in a CellLayout, we save information about the |
| // cellX and cellY coordinates and which page was clicked. We then set this as a tag on |
| // the CellLayout that was long clicked |
| static final class CellInfo { |
| View cell; |
| int cellX = -1; |
| int cellY = -1; |
| int spanX; |
| int spanY; |
| int screen; |
| boolean valid; |
| |
| @Override |
| public String toString() { |
| return "Cell[view=" + (cell == null ? "null" : cell.getClass()) |
| + ", x=" + cellX + ", y=" + cellY + "]"; |
| } |
| } |
| } |