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Diffstat (limited to 'src/com/cyanogenmod/trebuchet/CellLayout.java')
| -rw-r--r-- | src/com/cyanogenmod/trebuchet/CellLayout.java | 1829 |
1 files changed, 1829 insertions, 0 deletions
diff --git a/src/com/cyanogenmod/trebuchet/CellLayout.java b/src/com/cyanogenmod/trebuchet/CellLayout.java new file mode 100644 index 000000000..509e09ff9 --- /dev/null +++ b/src/com/cyanogenmod/trebuchet/CellLayout.java @@ -0,0 +1,1829 @@ +/* + * 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.cyanogenmod.trebuchet; + +import android.animation.Animator; +import android.animation.AnimatorListenerAdapter; +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.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.cyanogenmod.trebuchet.R; +import com.cyanogenmod.trebuchet.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 boolean mScrollingTransformsDirty = false; + + 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<FolderRingAnimator> mFolderOuterRings = new ArrayList<FolderRingAnimator>(); + private int[] mFolderLeaveBehindCell = {-1, -1}; + + private int mForegroundAlpha = 0; + private float mBackgroundAlpha; + private float mBackgroundAlphaMultiplier = 1.0f; + + private Drawable mNormalBackground; + private Drawable mActiveGlowBackground; + private Drawable mOverScrollForegroundDrawable; + private Drawable mOverScrollLeft; + private Drawable mOverScrollRight; + private Rect mBackgroundRect; + private Rect mForegroundRect; + private int mForegroundPadding; + + // If we're actively dragging something over this screen, mIsDragOverlapping is true + private boolean mIsDragOverlapping = 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<CellLayout.LayoutParams, ObjectAnimator> mReorderAnimators = new + HashMap<CellLayout.LayoutParams, ObjectAnimator>(); + + // 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); + mActiveGlowBackground = res.getDrawable(R.drawable.homescreen_blue_strong_holo); + + 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); + mActiveGlowBackground.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); + + mDragCell[0] = mDragCell[1] = -1; + 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(); + + 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; + } + + void setIsDragOverlapping(boolean isDragOverlapping) { + if (mIsDragOverlapping != isDragOverlapping) { + mIsDragOverlapping = isDragOverlapping; + invalidate(); + } + } + + boolean getIsDragOverlapping() { + return mIsDragOverlapping; + } + + protected void setOverscrollTransformsDirty(boolean dirty) { + mScrollingTransformsDirty = dirty; + } + + protected void resetOverscrollTransforms() { + if (mScrollingTransformsDirty) { + setOverscrollTransformsDirty(false); + setTranslationX(0); + setRotationY(0); + // It doesn't matter if we pass true or false here, the important thing is that we + // pass 0, which results in the overscroll drawable not being drawn any more. + setOverScrollAmount(0, false); + setPivotX(getMeasuredWidth() / 2); + setPivotY(getMeasuredHeight() / 2); + } + } + + @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; + + if (mIsDragOverlapping) { + // In the mini case, we draw the active_glow bg *over* the active background + bg = mActiveGlowBackground; + } else { + bg = mNormalBackground; + } + + bg.setAlpha((int) (mBackgroundAlpha * mBackgroundAlphaMultiplier * 255)); + bg.setBounds(mBackgroundRect); + bg.draw(canvas); + } + + 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 boolean shouldDelayChildPressedState() { + return false; + } + + @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; + } + + @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); + } + + @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, Point dragOffset, Rect dragRegion) { + + final int oldDragCellX = mDragCell[0]; + final int oldDragCellY = mDragCell[1]; + final int[] nearest = findNearestVacantArea(originX, originY, spanX, spanY, v, mDragCell); + if (v != null && dragOffset == 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 && dragOffset == 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 { + if (dragOffset != null && dragRegion != null) { + // Center the drag region *horizontally* in the cell and apply a drag + // outline offset + left += dragOffset.x + ((mCellWidth * spanX) + ((spanX - 1) * mWidthGap) + - dragRegion.width()) / 2; + top += dragOffset.y; + } 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; + } +} |