/* * 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 android.animation.Animator; import android.animation.AnimatorListenerAdapter; import android.animation.AnimatorSet; import android.animation.ObjectAnimator; import android.animation.PropertyValuesHolder; 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.PorterDuff; import android.graphics.PorterDuffXfermode; import android.graphics.Rect; import android.graphics.RectF; import android.graphics.Region; import android.graphics.drawable.Drawable; import android.graphics.drawable.NinePatchDrawable; 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; import com.android.launcher2.FolderIcon.FolderRingAnimator; import java.util.ArrayList; import java.util.Arrays; import java.util.HashMap; public class CellLayout extends ViewGroup { static final String TAG = "CellLayout"; private int mOriginalCellWidth; private int mOriginalCellHeight; private int mCellWidth; private int mCellHeight; private int mCountX; private int mCountY; private int mOriginalWidthGap; private int mOriginalHeightGap; private int mWidthGap; private int mHeightGap; private int mMaxGap; 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[] mTmpXY = new int[2]; private final int[] mTmpPoint = new int[2]; private final PointF mTmpPointF = new PointF(); int[] mTempLocation = new int[2]; boolean[][] mOccupied; private boolean mLastDownOnOccupiedCell = false; private OnTouchListener mInterceptTouchListener; private ArrayList mFolderOuterRings = new ArrayList(); private int[] mFolderLeaveBehindCell = {-1, -1}; private int mForegroundAlpha = 0; 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 Drawable mOverScrollForegroundDrawable; private Drawable mOverScrollLeft; private Drawable mOverScrollRight; private Rect mBackgroundRect; private Rect mForegroundRect; private Rect mGlowBackgroundRect; private float mGlowBackgroundScale; private float mGlowBackgroundAlpha; private int mForegroundPadding; 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[4]; 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; private HashMap mReorderAnimators = new HashMap(); // 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); mOriginalCellWidth = mCellWidth = a.getDimensionPixelSize(R.styleable.CellLayout_cellWidth, 10); mOriginalCellHeight = mCellHeight = a.getDimensionPixelSize(R.styleable.CellLayout_cellHeight, 10); mWidthGap = mOriginalWidthGap = a.getDimensionPixelSize(R.styleable.CellLayout_widthGap, 0); mHeightGap = mOriginalHeightGap = a.getDimensionPixelSize(R.styleable.CellLayout_heightGap, 0); mMaxGap = a.getDimensionPixelSize(R.styleable.CellLayout_maxGap, 0); mCountX = LauncherModel.getCellCountX(); mCountY = LauncherModel.getCellCountY(); mOccupied = new boolean[mCountX][mCountY]; a.recycle(); setAlwaysDrawnWithCacheEnabled(false); final Resources res = getResources(); mNormalBackground = res.getDrawable(R.drawable.homescreen_blue_normal_holo); mActiveBackground = res.getDrawable(R.drawable.homescreen_blue_strong_holo); mActiveGlowBackground = res.getDrawable(R.drawable.homescreen_blue_strong_holo); mNormalBackgroundMini = res.getDrawable(R.drawable.homescreen_small_blue); mNormalGlowBackgroundMini = res.getDrawable(R.drawable.homescreen_small_blue_strong); mActiveBackgroundMini = res.getDrawable(R.drawable.homescreen_small_blue_strong); mActiveGlowBackgroundMini = res.getDrawable(R.drawable.homescreen_small_blue_strong); mOverScrollLeft = res.getDrawable(R.drawable.overscroll_glow_left); mOverScrollRight = res.getDrawable(R.drawable.overscroll_glow_right); mForegroundPadding = res.getDimensionPixelSize(R.dimen.workspace_overscroll_drawable_padding); 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(); mForegroundRect = new Rect(); mGlowBackgroundRect = new Rect(); setHoverScale(1.0f); setHoverAlpha(1.0f); mChildren = new CellLayoutChildren(context); mChildren.setCellDimensions(mCellWidth, mCellHeight, mWidthGap, mHeightGap); addView(mChildren); } static int widthInPortrait(Resources r, int numCells) { // We use this method from Workspace to figure out how many rows/columns Launcher should // have. We ignore the left/right padding on CellLayout because it turns out in our design // the padding extends outside the visible screen size, but it looked fine anyway. int cellWidth = r.getDimensionPixelSize(R.dimen.workspace_cell_width); int minGap = Math.min(r.getDimensionPixelSize(R.dimen.workspace_width_gap), r.getDimensionPixelSize(R.dimen.workspace_height_gap)); return minGap * (numCells - 1) + cellWidth * numCells; } static int heightInLandscape(Resources r, int numCells) { // We use this method from Workspace to figure out how many rows/columns Launcher should // have. We ignore the left/right padding on CellLayout because it turns out in our design // the padding extends outside the visible screen size, but it looked fine anyway. int cellHeight = r.getDimensionPixelSize(R.dimen.workspace_cell_height); int minGap = Math.min(r.getDimensionPixelSize(R.dimen.workspace_width_gap), r.getDimensionPixelSize(R.dimen.workspace_height_gap)); return minGap * (numCells - 1) + cellHeight * numCells; } public void enableHardwareLayers() { mChildren.enableHardwareLayers(); } public void setGridSize(int x, int y) { mCountX = x; mCountY = y; mOccupied = new boolean[mCountX][mCountY]; requestLayout(); } private void invalidateBubbleTextView(BubbleTextView icon) { final int padding = icon.getPressedOrFocusedBackgroundPadding(); invalidate(icon.getLeft() + getPaddingLeft() - padding, icon.getTop() + getPaddingTop() - padding, icon.getRight() + getPaddingLeft() + padding, icon.getBottom() + getPaddingTop() + padding); } void setOverScrollAmount(float r, boolean left) { if (left && mOverScrollForegroundDrawable != mOverScrollLeft) { mOverScrollForegroundDrawable = mOverScrollLeft; } else if (!left && mOverScrollForegroundDrawable != mOverScrollRight) { mOverScrollForegroundDrawable = mOverScrollRight; } mForegroundAlpha = (int) Math.round((r * 255)); mOverScrollForegroundDrawable.setAlpha(mForegroundAlpha); invalidate(); } 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() { 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_screenOnDropAlphaFadeDuration)); 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 (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 = getPaddingLeft() - (mWidthGap / 2) - (width / 2); for (int col = 0; col <= countX; col++) { int y = getPaddingTop() - (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() + getPaddingLeft() - padding, mPressedOrFocusedIcon.getTop() + getPaddingTop() - padding, null); } } // The folder outer / inner ring image(s) for (int i = 0; i < mFolderOuterRings.size(); i++) { FolderRingAnimator fra = mFolderOuterRings.get(i); // Draw outer ring Drawable d = FolderRingAnimator.sSharedOuterRingDrawable; int width = (int) fra.getOuterRingSize(); int height = width; cellToPoint(fra.mCellX, fra.mCellY, mTempLocation); int centerX = mTempLocation[0] + mCellWidth / 2; int centerY = mTempLocation[1] + FolderRingAnimator.sPreviewSize / 2; canvas.save(); canvas.translate(centerX - width / 2, centerY - height / 2); d.setBounds(0, 0, width, height); d.draw(canvas); canvas.restore(); // Draw inner ring d = FolderRingAnimator.sSharedInnerRingDrawable; width = (int) fra.getInnerRingSize(); height = width; cellToPoint(fra.mCellX, fra.mCellY, mTempLocation); centerX = mTempLocation[0] + mCellWidth / 2; centerY = mTempLocation[1] + FolderRingAnimator.sPreviewSize / 2; canvas.save(); canvas.translate(centerX - width / 2, centerY - width / 2); d.setBounds(0, 0, width, height); d.draw(canvas); canvas.restore(); } if (mFolderLeaveBehindCell[0] >= 0 && mFolderLeaveBehindCell[1] >= 0) { Drawable d = FolderIcon.sSharedFolderLeaveBehind; int width = d.getIntrinsicWidth(); int height = d.getIntrinsicHeight(); cellToPoint(mFolderLeaveBehindCell[0], mFolderLeaveBehindCell[1], mTempLocation); int centerX = mTempLocation[0] + mCellWidth / 2; int centerY = mTempLocation[1] + FolderRingAnimator.sPreviewSize / 2; canvas.save(); canvas.translate(centerX - width / 2, centerY - width / 2); d.setBounds(0, 0, width, height); d.draw(canvas); canvas.restore(); } } @Override protected void dispatchDraw(Canvas canvas) { super.dispatchDraw(canvas); if (mForegroundAlpha > 0) { mOverScrollForegroundDrawable.setBounds(mForegroundRect); Paint p = ((NinePatchDrawable) mOverScrollForegroundDrawable).getPaint(); p.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.ADD)); mOverScrollForegroundDrawable.draw(canvas); p.setXfermode(null); } } public void showFolderAccept(FolderRingAnimator fra) { mFolderOuterRings.add(fra); } public void hideFolderAccept(FolderRingAnimator fra) { if (mFolderOuterRings.contains(fra)) { mFolderOuterRings.remove(fra); } invalidate(); } public void setFolderLeaveBehindCell(int x, int y) { mFolderLeaveBehindCell[0] = x; mFolderLeaveBehindCell[1] = y; invalidate(); } public void clearFolderLeaveBehind() { mFolderLeaveBehindCell[0] = -1; mFolderLeaveBehindCell[1] = -1; invalidate(); } @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(); } } @Override public void removeAllViews() { clearOccupiedCells(); mChildren.removeAllViews(); } @Override public void removeAllViewsInLayout() { if (mChildren.getChildCount() > 0) { 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); // The child hit rect is relative to the CellLayoutChildren parent, so we need to // offset that by this CellLayout's padding to test an (x,y) point that is relative // to this view. frame.offset(mPaddingLeft, mPaddingTop); if (frame.contains(x, y)) { cellInfo.cell = child; cellInfo.cellX = lp.cellX; cellInfo.cellY = lp.cellY; cellInfo.spanX = lp.cellHSpan; cellInfo.spanY = lp.cellVSpan; found = true; break; } } } mLastDownOnOccupiedCell = found; if (!found) { final int cellXY[] = mTmpXY; pointToCellExact(x, y, cellXY); cellInfo.cell = null; cellInfo.cellX = cellXY[0]; cellInfo.cellY = cellXY[1]; cellInfo.spanX = 1; cellInfo.spanY = 1; } setTag(cellInfo); } @Override public boolean onInterceptTouchEvent(MotionEvent ev) { // First we clear the tag to ensure that on every touch down we start with a fresh slate, // even in the case where we return early. Not clearing here was causing bugs whereby on // long-press we'd end up picking up an item from a previous drag operation. final int action = ev.getAction(); if (action == MotionEvent.ACTION_DOWN) { clearTagCellInfo(); } if (mInterceptTouchListener != null && mInterceptTouchListener.onTouch(this, ev)) { return true; } if (action == MotionEvent.ACTION_DOWN) { setTagToCellInfoForPoint((int) ev.getX(), (int) ev.getY()); } return false; } private void clearTagCellInfo() { final CellInfo cellInfo = mCellInfo; cellInfo.cell = null; cellInfo.cellX = -1; cellInfo.cellY = -1; cellInfo.spanX = 0; cellInfo.spanY = 0; setTag(cellInfo); } 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 = getPaddingLeft(); final int vStartPadding = getPaddingTop(); 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 = getPaddingLeft(); final int vStartPadding = getPaddingTop(); 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 = getPaddingLeft(); final int vStartPadding = getPaddingTop(); 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; } Rect getContentRect(Rect r) { if (r == null) { r = new Rect(); } int left = getPaddingLeft(); int top = getPaddingTop(); int right = left + getWidth() - mPaddingLeft - mPaddingRight; int bottom = top + getHeight() - mPaddingTop - mPaddingBottom; r.set(left, top, right, bottom); return r; } @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"); } int numWidthGaps = mCountX - 1; int numHeightGaps = mCountY - 1; if (mOriginalWidthGap < 0 || mOriginalHeightGap < 0) { int hSpace = widthSpecSize - mPaddingLeft - mPaddingRight; int vSpace = heightSpecSize - mPaddingTop - mPaddingBottom; int hFreeSpace = hSpace - (mCountX * mOriginalCellWidth); int vFreeSpace = vSpace - (mCountY * mOriginalCellHeight); mWidthGap = Math.min(mMaxGap, numWidthGaps > 0 ? (hFreeSpace / numWidthGaps) : 0); mHeightGap = Math.min(mMaxGap,numHeightGaps > 0 ? (vFreeSpace / numHeightGaps) : 0); mChildren.setCellDimensions(mCellWidth, mCellHeight, mWidthGap, mHeightGap); } else { mWidthGap = mOriginalWidthGap; mHeightGap = mOriginalHeightGap; } // Initial values correspond to widthSpecMode == MeasureSpec.EXACTLY int newWidth = widthSpecSize; int newHeight = heightSpecSize; if (widthSpecMode == MeasureSpec.AT_MOST) { newWidth = mPaddingLeft + mPaddingRight + (mCountX * mCellWidth) + ((mCountX - 1) * mWidthGap); newHeight = mPaddingTop + mPaddingBottom + (mCountY * mCellHeight) + ((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 - mPaddingLeft - mPaddingRight, MeasureSpec.EXACTLY); int childheightMeasureSpec = MeasureSpec.makeMeasureSpec(newHeight - mPaddingTop - mPaddingBottom, 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(mPaddingLeft, mPaddingTop, r - l - mPaddingRight, b - t - mPaddingBottom); } } @Override protected void onSizeChanged(int w, int h, int oldw, int oldh) { super.onSizeChanged(w, h, oldw, oldh); mBackgroundRect.set(0, 0, w, h); mForegroundRect.set(mForegroundPadding, mForegroundPadding, w - 2 * mForegroundPadding, h - 2 * mForegroundPadding); 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); } public boolean animateChildToPosition(final View child, int cellX, int cellY, int duration, int delay) { CellLayoutChildren clc = getChildrenLayout(); if (clc.indexOfChild(child) != -1 && !mOccupied[cellX][cellY]) { final LayoutParams lp = (LayoutParams) child.getLayoutParams(); final ItemInfo info = (ItemInfo) child.getTag(); // We cancel any existing animations if (mReorderAnimators.containsKey(lp)) { mReorderAnimators.get(lp).cancel(); mReorderAnimators.remove(lp); } int oldX = lp.x; int oldY = lp.y; mOccupied[lp.cellX][lp.cellY] = false; mOccupied[cellX][cellY] = true; lp.isLockedToGrid = true; lp.cellX = info.cellX = cellX; lp.cellY = info.cellY = cellY; clc.setupLp(lp); lp.isLockedToGrid = false; int newX = lp.x; int newY = lp.y; lp.x = oldX; lp.y = oldY; child.requestLayout(); PropertyValuesHolder x = PropertyValuesHolder.ofInt("x", oldX, newX); PropertyValuesHolder y = PropertyValuesHolder.ofInt("y", oldY, newY); ObjectAnimator oa = ObjectAnimator.ofPropertyValuesHolder(lp, x, y); oa.setDuration(duration); mReorderAnimators.put(lp, oa); oa.addUpdateListener(new AnimatorUpdateListener() { public void onAnimationUpdate(ValueAnimator animation) { child.requestLayout(); } }); oa.addListener(new AnimatorListenerAdapter() { boolean cancelled = false; public void onAnimationEnd(Animator animation) { // If the animation was cancelled, it means that another animation // has interrupted this one, and we don't want to lock the item into // place just yet. if (!cancelled) { lp.isLockedToGrid = true; } if (mReorderAnimators.containsKey(lp)) { mReorderAnimators.remove(lp); } } public void onAnimationCancel(Animator animation) { cancelled = true; } }); oa.setStartDelay(delay); oa.start(); return true; } return false; } /** * 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 (dragOutline == null && v == null) { if (mCrosshairsDrawable != null) { invalidate(); } return; } 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. top += (v.getHeight() - dragOutline.getHeight()) / 2; // We center about the x axis left += ((mCellWidth * spanX) + ((spanX - 1) * mWidthGap) - dragOutline.getWidth()) / 2; } else { // Center the drag outline in the cell left += ((mCellWidth * spanX) + ((spanX - 1) * mWidthGap) - dragOutline.getWidth()) / 2; top += ((mCellHeight * spanY) + ((spanY - 1) * mHeightGap) - 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 = mTmpXY; 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 -1, -1 if no suitable location found if (bestDistance == Double.MAX_VALUE) { bestXY[0] = -1; bestXY[1] = -1; } return bestXY; } /** * 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; } /** * 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; } /** * 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) { if (child != null) { LayoutParams lp = (LayoutParams) child.getLayoutParams(); lp.dropped = true; child.requestLayout(); } } /** * 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 = getPaddingLeft(); final int vStartPadding = getPaddingTop(); 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 = (int) Math.ceil(width / (float) smallerSize); int spanY = (int) Math.ceil(height / (float) 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 y = 0; y < yCount; y++) { for (int x = 0; x < xCount; x++) { 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 int getDesiredWidth() { return mPaddingLeft + mPaddingRight + (mCountX * mCellWidth) + (Math.max((mCountX - 1), 0) * mWidthGap); } public int getDesiredHeight() { return mPaddingTop + mPaddingBottom + (mCountY * mCellHeight) + (Math.max((mCountY - 1), 0) * mHeightGap); } 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; // X coordinate of the view in the layout. @ViewDebug.ExportedProperty int x; // Y coordinate of the view in the layout. @ViewDebug.ExportedProperty int y; boolean dropped; 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) { 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 = myCellX * (cellWidth + widthGap) + leftMargin; y = myCellY * (cellHeight + heightGap) + topMargin; } } public String toString() { return "(" + this.cellX + ", " + this.cellY + ")"; } public void setWidth(int width) { this.width = width; } public int getWidth() { return width; } public void setHeight(int height) { this.height = height; } public int getHeight() { return height; } public void setX(int x) { this.x = x; } public int getX() { return x; } public void setY(int y) { this.y = y; } public int getY() { return y; } } // 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; long container; @Override public String toString() { return "Cell[view=" + (cell == null ? "null" : cell.getClass()) + ", x=" + cellX + ", y=" + cellY + "]"; } } public boolean lastDownOnOccupiedCell() { return mLastDownOnOccupiedCell; } }