| /* |
| * 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 com.android.launcher.R; |
| |
| import android.app.WallpaperManager; |
| 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.Color; |
| import android.graphics.Matrix; |
| import android.graphics.Paint; |
| import android.graphics.PorterDuff; |
| import android.graphics.Rect; |
| import android.graphics.RectF; |
| import android.graphics.drawable.Drawable; |
| import android.util.AttributeSet; |
| import android.view.ContextMenu; |
| import android.view.MotionEvent; |
| import android.view.View; |
| import android.view.ViewDebug; |
| import android.view.ViewGroup; |
| import android.view.View.OnTouchListener; |
| import android.view.animation.Animation; |
| import android.view.animation.LayoutAnimationController; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| |
| public class CellLayout extends ViewGroup { |
| static final String TAG = "CellLayout"; |
| // we make the dimmed bitmap smaller than the screen itself for memory + perf reasons |
| static final float DIMMED_BITMAP_SCALE = 0.25f; |
| |
| private boolean mPortrait; |
| |
| private int mCellWidth; |
| private int mCellHeight; |
| |
| private int mLeftPadding; |
| private int mRightPadding; |
| private int mTopPadding; |
| private int mBottomPadding; |
| |
| private int mCountX; |
| private int mCountY; |
| |
| private int mWidthGap; |
| private int mHeightGap; |
| |
| private final Rect mRect = new Rect(); |
| private final RectF mRectF = new RectF(); |
| private final CellInfo mCellInfo = new CellInfo(); |
| |
| // This is a temporary variable to prevent having to allocate a new object just to |
| // return an (x, y) value from helper functions. Do NOT use it to maintain other state. |
| private final int[] mTmpCellXY = new int[2]; |
| |
| boolean[][] mOccupied; |
| |
| private OnTouchListener mInterceptTouchListener; |
| |
| // this is what the home screen fades to when it shrinks |
| // (ie in all apps and in home screen customize mode) |
| private Bitmap mDimmedBitmap; |
| private Canvas mDimmedBitmapCanvas; |
| private float mDimmedBitmapAlpha; |
| private boolean mDimmedBitmapDirty = false; |
| private final Paint mDimmedBitmapPaint = new Paint(); |
| private final Rect mLayoutRect = new Rect(); |
| private final Rect mDimmedBitmapRect = new Rect(); |
| private Drawable mDimmedBitmapBackground; |
| private Drawable mDimmedBitmapBackgroundHover; |
| // If we're actively dragging something over this screen and it's small, |
| // mHover is true |
| private boolean mHover = false; |
| |
| private final RectF mDragRect = new RectF(); |
| |
| // When dragging, used to indicate a vacant drop location |
| private Drawable mVacantDrawable; |
| |
| // When dragging, used to indicate an occupied drop location |
| private Drawable mOccupiedDrawable; |
| |
| // Updated to point to mVacantDrawable or mOccupiedDrawable, as appropriate |
| private Drawable mDragRectDrawable; |
| |
| // When a drag operation is in progress, holds the nearest cell to the touch point |
| private final int[] mDragCell = new int[2]; |
| |
| private boolean mDirtyTag; |
| private boolean mLastDownOnOccupiedCell = false; |
| |
| private final WallpaperManager mWallpaperManager; |
| |
| 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); |
| mVacantDrawable = getResources().getDrawable(R.drawable.rounded_rect_green); |
| mOccupiedDrawable = getResources().getDrawable(R.drawable.rounded_rect_red); |
| |
| if (LauncherApplication.isScreenXLarge()) { |
| mDimmedBitmapBackground = getResources().getDrawable( |
| R.drawable.mini_home_screen_bg); |
| |
| mDimmedBitmapBackgroundHover = getResources().getDrawable( |
| R.drawable.mini_home_screen_bg_hover); |
| } |
| |
| TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.CellLayout, defStyle, 0); |
| |
| mCellWidth = a.getDimensionPixelSize(R.styleable.CellLayout_cellWidth, 10); |
| mCellHeight = a.getDimensionPixelSize(R.styleable.CellLayout_cellHeight, 10); |
| |
| mLeftPadding = |
| a.getDimensionPixelSize(R.styleable.CellLayout_xAxisStartPadding, 10); |
| mRightPadding = |
| a.getDimensionPixelSize(R.styleable.CellLayout_xAxisEndPadding, 10); |
| mTopPadding = |
| a.getDimensionPixelSize(R.styleable.CellLayout_yAxisStartPadding, 10); |
| mBottomPadding = |
| a.getDimensionPixelSize(R.styleable.CellLayout_yAxisEndPadding, 10); |
| |
| mCountX = LauncherModel.getCellCountX(); |
| mCountY = LauncherModel.getCellCountY(); |
| |
| a.recycle(); |
| |
| setAlwaysDrawnWithCacheEnabled(false); |
| |
| mWallpaperManager = WallpaperManager.getInstance(getContext()); |
| |
| mDimmedBitmapPaint.setFilterBitmap(true); |
| } |
| |
| public void setHover(boolean value) { |
| if (mHover != value) { |
| invalidate(); |
| } |
| mHover = value; |
| } |
| |
| @Override |
| public void dispatchDraw(Canvas canvas) { |
| if (mDimmedBitmapAlpha > 0.0f) { |
| final Drawable bg = mHover ? mDimmedBitmapBackgroundHover : mDimmedBitmapBackground; |
| bg.setAlpha((int) (mDimmedBitmapAlpha * 255)); |
| bg.draw(canvas); |
| } |
| super.dispatchDraw(canvas); |
| } |
| |
| @Override |
| protected void onDraw(Canvas canvas) { |
| if (!mDragRect.isEmpty()) { |
| mDragRectDrawable.setBounds( |
| (int)mDragRect.left, |
| (int)mDragRect.top, |
| (int)mDragRect.right, |
| (int)mDragRect.bottom); |
| mDragRectDrawable.draw(canvas); |
| } |
| if (mDimmedBitmap != null && mDimmedBitmapAlpha > 0.0f) { |
| if (mDimmedBitmapDirty) { |
| updateDimmedBitmap(); |
| mDimmedBitmapDirty = false; |
| } |
| mDimmedBitmapPaint.setAlpha((int) (mDimmedBitmapAlpha * 255)); |
| |
| canvas.drawBitmap(mDimmedBitmap, mDimmedBitmapRect, mLayoutRect, mDimmedBitmapPaint); |
| } |
| } |
| |
| @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; |
| } |
| |
| // Takes canonical layout parameters |
| public boolean addViewToCellLayout(View child, int index, int childId, LayoutParams params) { |
| 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); |
| |
| // We might be in the middle or end of shrinking/fading to a dimmed view |
| // Make sure this view's alpha is set the same as all the rest of the views |
| child.setAlpha(1.0f - mDimmedBitmapAlpha); |
| |
| addView(child, index, lp); |
| |
| // next time we draw the dimmed bitmap we need to update it |
| mDimmedBitmapDirty = true; |
| return true; |
| } |
| return false; |
| } |
| |
| @Override |
| public void removeView(View view) { |
| super.removeView(view); |
| mDimmedBitmapDirty = true; |
| } |
| |
| @Override |
| public void requestChildFocus(View child, View focused) { |
| super.requestChildFocus(child, focused); |
| if (child != null) { |
| Rect r = new Rect(); |
| child.getDrawingRect(r); |
| requestRectangleOnScreen(r); |
| } |
| } |
| |
| @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 = getChildCount(); |
| |
| boolean found = false; |
| for (int i = count - 1; i >= 0; i--) { |
| final View child = getChildAt(i); |
| |
| if ((child.getVisibility()) == VISIBLE || child.getAnimation() != null) { |
| child.getHitRect(frame); |
| if (frame.contains(x, y)) { |
| final LayoutParams lp = (LayoutParams) child.getLayoutParams(); |
| cellInfo.cell = child; |
| cellInfo.cellX = lp.cellX; |
| cellInfo.cellY = lp.cellY; |
| cellInfo.spanX = lp.cellHSpan; |
| cellInfo.spanY = lp.cellVSpan; |
| cellInfo.intersectX = lp.cellX; |
| cellInfo.intersectY = lp.cellY; |
| cellInfo.valid = true; |
| found = true; |
| mDirtyTag = false; |
| break; |
| } |
| } |
| } |
| |
| mLastDownOnOccupiedCell = found; |
| |
| if (!found) { |
| final int cellXY[] = mTmpCellXY; |
| pointToCellExact(x, y, cellXY); |
| |
| final boolean portrait = mPortrait; |
| final int xCount = mCountX; |
| final int yCount = mCountY; |
| |
| final boolean[][] occupied = mOccupied; |
| findOccupiedCells(xCount, yCount, occupied, null, true); |
| |
| cellInfo.cell = null; |
| cellInfo.cellX = cellXY[0]; |
| cellInfo.cellY = cellXY[1]; |
| cellInfo.spanX = 1; |
| cellInfo.spanY = 1; |
| cellInfo.intersectX = cellXY[0]; |
| cellInfo.intersectY = cellXY[1]; |
| cellInfo.valid = cellXY[0] >= 0 && cellXY[1] >= 0 && cellXY[0] < xCount && |
| cellXY[1] < yCount && !occupied[cellXY[0]][cellXY[1]]; |
| |
| // Instead of finding the interesting vacant cells here, wait until a |
| // caller invokes getTag() to retrieve the result. Finding the vacant |
| // cells is a bit expensive and can generate many new objects, it's |
| // therefore better to defer it until we know we actually need it. |
| |
| mDirtyTag = true; |
| } |
| setTag(cellInfo); |
| } |
| |
| |
| @Override |
| public boolean onInterceptTouchEvent(MotionEvent ev) { |
| if (mInterceptTouchListener != null && mInterceptTouchListener.onTouch(this, ev)) { |
| return true; |
| } |
| final int action = ev.getAction(); |
| final CellInfo cellInfo = mCellInfo; |
| |
| if (action == MotionEvent.ACTION_DOWN) { |
| setTagToCellInfoForPoint((int) ev.getX(), (int) ev.getY()); |
| } else if (action == MotionEvent.ACTION_UP) { |
| cellInfo.cell = null; |
| cellInfo.cellX = -1; |
| cellInfo.cellY = -1; |
| cellInfo.spanX = 0; |
| cellInfo.spanY = 0; |
| cellInfo.valid = false; |
| mDirtyTag = false; |
| setTag(cellInfo); |
| } |
| |
| return false; |
| } |
| |
| @Override |
| public CellInfo getTag() { |
| final CellInfo info = (CellInfo) super.getTag(); |
| if (mDirtyTag && info.valid) { |
| final int xCount = mCountX; |
| final int yCount = mCountY; |
| |
| final boolean[][] occupied = mOccupied; |
| findOccupiedCells(xCount, yCount, occupied, null, true); |
| |
| info.updateOccupiedCells(occupied, mCountX, mCountY); |
| |
| mDirtyTag = false; |
| } |
| return info; |
| } |
| |
| /** |
| * Check if the column 'x' is empty from rows 'top' to 'bottom', inclusive. |
| */ |
| private static boolean isColumnEmpty(int x, int top, int bottom, boolean[][] occupied) { |
| for (int y = top; y <= bottom; y++) { |
| if (occupied[x][y]) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| /** |
| * Check if the row 'y' is empty from columns 'left' to 'right', inclusive. |
| */ |
| private static boolean isRowEmpty(int y, int left, int right, boolean[][] occupied) { |
| for (int x = left; x <= right; x++) { |
| if (occupied[x][y]) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| CellInfo updateOccupiedCells(boolean[] occupiedCells, View ignoreView) { |
| final int xCount = mCountX; |
| final int yCount = mCountY; |
| |
| boolean[][] occupied = mOccupied; |
| |
| if (occupiedCells != null) { |
| for (int y = 0; y < yCount; y++) { |
| for (int x = 0; x < xCount; x++) { |
| occupied[x][y] = occupiedCells[y * xCount + x]; |
| } |
| } |
| } else { |
| findOccupiedCells(xCount, yCount, occupied, ignoreView, true); |
| } |
| |
| CellInfo cellInfo = new CellInfo(); |
| |
| cellInfo.cellX = -1; |
| cellInfo.cellY = -1; |
| cellInfo.intersectX = -1; |
| cellInfo.intersectY = -1; |
| cellInfo.spanY = 0; |
| cellInfo.spanX = 0; |
| cellInfo.screen = mCellInfo.screen; |
| |
| cellInfo.updateOccupiedCells(occupied, mCountX, mCountY); |
| |
| cellInfo.valid = cellInfo.existsEmptyCell(); |
| |
| // Assume the caller will perform their own cell searching, otherwise we |
| // risk causing an unnecessary rebuild after findCellForSpan() |
| |
| return cellInfo; |
| } |
| |
| /** |
| * Given a point, return the cell that strictly encloses that point |
| * @param x X coordinate of the point |
| * @param y Y coordinate of the point |
| * @param result Array of 2 ints to hold the x and y coordinate of the cell |
| */ |
| void pointToCellExact(int x, int y, int[] result) { |
| final int hStartPadding = getLeftPadding(); |
| final int vStartPadding = getTopPadding(); |
| |
| result[0] = (x - hStartPadding) / (mCellWidth + mWidthGap); |
| result[1] = (y - vStartPadding) / (mCellHeight + mHeightGap); |
| |
| final int xAxis = mCountX; |
| final int yAxis = mCountY; |
| |
| if (result[0] < 0) result[0] = 0; |
| if (result[0] >= xAxis) result[0] = xAxis - 1; |
| if (result[1] < 0) result[1] = 0; |
| if (result[1] >= yAxis) result[1] = yAxis - 1; |
| } |
| |
| /** |
| * Given a point, return the cell that most closely encloses that point |
| * @param x X coordinate of the point |
| * @param y Y coordinate of the point |
| * @param result Array of 2 ints to hold the x and y coordinate of the cell |
| */ |
| void pointToCellRounded(int x, int y, int[] result) { |
| pointToCellExact(x + (mCellWidth / 2), y + (mCellHeight / 2), result); |
| } |
| |
| /** |
| * Given a cell coordinate, return the point that represents the upper left corner of that cell |
| * |
| * @param cellX X coordinate of the cell |
| * @param cellY Y coordinate of the cell |
| * |
| * @param result Array of 2 ints to hold the x and y coordinate of the point |
| */ |
| void cellToPoint(int cellX, int cellY, int[] result) { |
| final int hStartPadding = getLeftPadding(); |
| final int vStartPadding = getTopPadding(); |
| |
| result[0] = hStartPadding + cellX * (mCellWidth + mWidthGap); |
| result[1] = vStartPadding + cellY * (mCellHeight + mHeightGap); |
| } |
| |
| int getCellWidth() { |
| return mCellWidth; |
| } |
| |
| int getCellHeight() { |
| return mCellHeight; |
| } |
| |
| int getLeftPadding() { |
| return mLeftPadding; |
| } |
| |
| int getTopPadding() { |
| return mTopPadding; |
| } |
| |
| int getRightPadding() { |
| return mRightPadding; |
| } |
| |
| int getBottomPadding() { |
| return mBottomPadding; |
| } |
| |
| @Override |
| protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { |
| // TODO: currently ignoring padding |
| |
| int widthSpecMode = MeasureSpec.getMode(widthMeasureSpec); |
| int widthSpecSize = MeasureSpec.getSize(widthMeasureSpec); |
| |
| int heightSpecMode = MeasureSpec.getMode(heightMeasureSpec); |
| int heightSpecSize = MeasureSpec.getSize(heightMeasureSpec); |
| |
| if (widthSpecMode == MeasureSpec.UNSPECIFIED || heightSpecMode == MeasureSpec.UNSPECIFIED) { |
| throw new RuntimeException("CellLayout cannot have UNSPECIFIED dimensions"); |
| } |
| |
| final int cellWidth = mCellWidth; |
| final int cellHeight = mCellHeight; |
| |
| if (mOccupied == null) { |
| mOccupied = new boolean[mCountX][mCountY]; |
| } |
| |
| int numWidthGaps = mCountX - 1; |
| int numHeightGaps = mCountY - 1; |
| |
| int vSpaceLeft = heightSpecSize - mTopPadding |
| - mBottomPadding - (cellHeight * mCountY); |
| mHeightGap = vSpaceLeft / numHeightGaps; |
| |
| int hSpaceLeft = widthSpecSize - mLeftPadding |
| - mRightPadding - (cellWidth * mCountX); |
| mWidthGap = hSpaceLeft / numWidthGaps; |
| |
| int count = getChildCount(); |
| |
| for (int i = 0; i < count; i++) { |
| View child = getChildAt(i); |
| LayoutParams lp = (LayoutParams) child.getLayoutParams(); |
| lp.setup(cellWidth, cellHeight, mWidthGap, mHeightGap, |
| mLeftPadding, mTopPadding); |
| |
| int childWidthMeasureSpec = MeasureSpec.makeMeasureSpec(lp.width, |
| MeasureSpec.EXACTLY); |
| int childheightMeasureSpec = MeasureSpec.makeMeasureSpec(lp.height, |
| MeasureSpec.EXACTLY); |
| |
| child.measure(childWidthMeasureSpec, childheightMeasureSpec); |
| } |
| |
| setMeasuredDimension(widthSpecSize, heightSpecSize); |
| } |
| |
| @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); |
| if (child.getVisibility() != GONE) { |
| |
| CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams(); |
| |
| int childLeft = lp.x; |
| int childTop = lp.y; |
| child.layout(childLeft, childTop, childLeft + lp.width, childTop + lp.height); |
| |
| if (lp.dropped) { |
| lp.dropped = false; |
| |
| final int[] cellXY = mTmpCellXY; |
| getLocationOnScreen(cellXY); |
| mWallpaperManager.sendWallpaperCommand(getWindowToken(), "android.home.drop", |
| cellXY[0] + childLeft + lp.width / 2, |
| cellXY[1] + childTop + lp.height / 2, 0, null); |
| } |
| } |
| } |
| } |
| |
| @Override |
| protected void onSizeChanged(int w, int h, int oldw, int oldh) { |
| super.onSizeChanged(w, h, oldw, oldh); |
| mLayoutRect.set(0, 0, w, h); |
| mDimmedBitmapRect.set(0, 0, (int) (DIMMED_BITMAP_SCALE * w), (int) (DIMMED_BITMAP_SCALE * h)); |
| if (mDimmedBitmapBackground != null) { |
| mDimmedBitmapBackground.setBounds(mLayoutRect); |
| } |
| if (mDimmedBitmapBackgroundHover != null) { |
| mDimmedBitmapBackgroundHover.setBounds(mLayoutRect); |
| } |
| } |
| |
| @Override |
| protected void setChildrenDrawingCacheEnabled(boolean enabled) { |
| final int count = getChildCount(); |
| for (int i = 0; i < count; i++) { |
| final View view = getChildAt(i); |
| view.setDrawingCacheEnabled(enabled); |
| // Update the drawing caches |
| view.buildDrawingCache(true); |
| } |
| } |
| |
| @Override |
| protected void setChildrenDrawnWithCacheEnabled(boolean enabled) { |
| super.setChildrenDrawnWithCacheEnabled(enabled); |
| } |
| |
| public float getDimmedBitmapAlpha() { |
| return mDimmedBitmapAlpha; |
| } |
| |
| public void setDimmedBitmapAlpha(float alpha) { |
| // If we're dimming the screen after it was not dimmed, refresh |
| // to allow for updated widgets. We don't continually refresh it |
| // after this point, however, as an optimization |
| if (mDimmedBitmapAlpha == 0.0f && alpha > 0.0f) { |
| updateDimmedBitmap(); |
| } |
| mDimmedBitmapAlpha = alpha; |
| setChildrenAlpha(1.0f - mDimmedBitmapAlpha); |
| } |
| |
| private void setChildrenAlpha(float alpha) { |
| for (int i = 0; i < getChildCount(); i++) { |
| getChildAt(i).setAlpha(alpha); |
| } |
| } |
| |
| public void updateDimmedBitmap() { |
| if (mDimmedBitmap == null) { |
| mDimmedBitmap = Bitmap.createBitmap((int) (getWidth() * DIMMED_BITMAP_SCALE), |
| (int) (getHeight() * DIMMED_BITMAP_SCALE), Bitmap.Config.ARGB_8888); |
| mDimmedBitmapCanvas = new Canvas(mDimmedBitmap); |
| mDimmedBitmapCanvas.scale(DIMMED_BITMAP_SCALE, DIMMED_BITMAP_SCALE); |
| } |
| // clear the canvas |
| mDimmedBitmapCanvas.drawColor(0x00000000, PorterDuff.Mode.CLEAR); |
| |
| // draw the screen into the bitmap |
| // just for drawing to the bitmap, make all the items on the screen opaque |
| setChildrenAlpha(1.0f); |
| // call our superclass's dispatchdraw so we don't draw the background |
| super.dispatchDraw(mDimmedBitmapCanvas); |
| setChildrenAlpha(1.0f - mDimmedBitmapAlpha); |
| |
| // replace all colored areas with a dark (semi-transparent black) |
| mDimmedBitmapCanvas.drawColor(Color.argb(160, 0, 0, 0), PorterDuff.Mode.SRC_IN); |
| } |
| |
| private boolean isVacant(int originX, int originY, int spanX, int spanY) { |
| for (int i = 0; i < spanY; i++) { |
| if (!isRowEmpty(originY + i, originX, originX + spanX - 1, mOccupied)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| public View getChildAt(int x, int y) { |
| final int count = getChildCount(); |
| for (int i = 0; i < count; i++) { |
| View child = getChildAt(i); |
| LayoutParams lp = (LayoutParams) child.getLayoutParams(); |
| |
| if ((lp.cellX <= x) && (x < lp.cellX + lp.cellHSpan) && |
| (lp.cellY <= y) && (y < lp.cellY + lp.cellHSpan)) { |
| return child; |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * Estimate the size that a child with the given dimensions will take in the layout. |
| */ |
| void estimateChildSize(int minWidth, int minHeight, int[] result) { |
| // Assuming it's placed at 0, 0, find where the bottom right cell will land |
| rectToCell(minWidth, minHeight, result); |
| |
| // Then figure out the rect it will occupy |
| cellToRect(0, 0, result[0], result[1], mRectF); |
| result[0] = (int)mRectF.width(); |
| result[1] = (int)mRectF.height(); |
| } |
| |
| /** |
| * 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 view, int originX, int originY, int spanX, int spanY) { |
| final int[] originCell = mDragCell; |
| final int[] cellXY = mTmpCellXY; |
| estimateDropCell(originX, originY, spanX, spanY, cellXY); |
| |
| // Only recalculate the bounding rect when necessary |
| if (!Arrays.equals(cellXY, originCell)) { |
| originCell[0] = cellXY[0]; |
| originCell[1] = cellXY[1]; |
| |
| // Find the top left corner of the rect the object will occupy |
| final int[] topLeft = mTmpCellXY; |
| cellToPoint(originCell[0], originCell[1], topLeft); |
| final int left = topLeft[0]; |
| final int top = topLeft[1]; |
| |
| // Now find the bottom right |
| final int[] bottomRight = mTmpCellXY; |
| cellToPoint(originCell[0] + spanX - 1, originCell[1] + spanY - 1, bottomRight); |
| bottomRight[0] += mCellWidth; |
| bottomRight[1] += mCellHeight; |
| |
| final int countX = mCountX; |
| final int countY = mCountY; |
| // TODO: It's not necessary to do this every time, but it's not especially expensive |
| findOccupiedCells(countX, countY, mOccupied, view, false); |
| |
| boolean vacant = isVacant(originCell[0], originCell[1], spanX, spanY); |
| mDragRectDrawable = vacant ? mVacantDrawable : mOccupiedDrawable; |
| |
| // mDragRect will be rendered in onDraw() |
| mDragRect.set(left, top, bottomRight[0], bottomRight[1]); |
| invalidate(); |
| } |
| } |
| |
| /** |
| * 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 vacantCells Pre-computed set of vacant cells to search. |
| * @param recycle 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, |
| CellInfo vacantCells, int[] recycle) { |
| |
| // Keep track of best-scoring drop area |
| final int[] bestXY = recycle != null ? recycle : new int[2]; |
| double bestDistance = Double.MAX_VALUE; |
| |
| for (int x = 0; x < mCountX - (spanX - 1); x++) { |
| inner: |
| for (int y = 0; y < mCountY - (spanY - 1); y++) { |
| 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 below the row we just found |
| // an occupied cell |
| y += j; |
| continue inner; |
| } |
| } |
| } |
| final int[] cellXY = mTmpCellXY; |
| cellToPoint(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; |
| } |
| } |
| } |
| |
| // Return null if no suitable location found |
| if (bestDistance < Double.MAX_VALUE) { |
| return bestXY; |
| } else { |
| return null; |
| } |
| } |
| |
| /** |
| * Called when a drag and drop operation has finished (successfully or not). |
| */ |
| void onDragComplete() { |
| // Invalidate the drag data |
| mDragCell[0] = -1; |
| mDragCell[1] = -1; |
| |
| setHover(false); |
| mDragRect.setEmpty(); |
| invalidate(); |
| } |
| |
| /** |
| * Mark a child as having been dropped. |
| * |
| * @param child The child that is being dropped |
| */ |
| void onDropChild(View child) { |
| if (child != null) { |
| LayoutParams lp = (LayoutParams) child.getLayoutParams(); |
| lp.isDragging = false; |
| lp.dropped = true; |
| mDragRect.setEmpty(); |
| child.requestLayout(); |
| } |
| onDragComplete(); |
| } |
| |
| void onDropAborted(View child) { |
| if (child != null) { |
| ((LayoutParams) child.getLayoutParams()).isDragging = false; |
| } |
| onDragComplete(); |
| } |
| |
| /** |
| * Start dragging the specified child |
| * |
| * @param child The child that is being dragged |
| */ |
| void onDragChild(View child) { |
| LayoutParams lp = (LayoutParams) child.getLayoutParams(); |
| lp.isDragging = true; |
| mDragRect.setEmpty(); |
| } |
| |
| /** |
| * Computes a bounding rectangle for a range of cells |
| * |
| * @param cellX X coordinate of upper left corner expressed as a cell position |
| * @param cellY Y coordinate of upper left corner expressed as a cell position |
| * @param cellHSpan Width in cells |
| * @param cellVSpan Height in cells |
| * @param resultRect Rect into which to put the results |
| */ |
| public void cellToRect(int cellX, int cellY, int cellHSpan, int cellVSpan, RectF resultRect) { |
| final int cellWidth = mCellWidth; |
| final int cellHeight = mCellHeight; |
| final int widthGap = mWidthGap; |
| final int heightGap = mHeightGap; |
| |
| final int hStartPadding = getLeftPadding(); |
| final int vStartPadding = getTopPadding(); |
| |
| int width = cellHSpan * cellWidth + ((cellHSpan - 1) * widthGap); |
| int height = cellVSpan * cellHeight + ((cellVSpan - 1) * heightGap); |
| |
| int x = hStartPadding + cellX * (cellWidth + widthGap); |
| int y = vStartPadding + cellY * (cellHeight + heightGap); |
| |
| resultRect.set(x, y, x + width, y + height); |
| } |
| |
| /** |
| * Computes the required horizontal and vertical cell spans to always |
| * fit the given rectangle. |
| * |
| * @param width Width in pixels |
| * @param height Height in pixels |
| * @param result An array of length 2 in which to store the result (may be null). |
| */ |
| public int[] rectToCell(int width, int height, int[] result) { |
| // Always assume we're working with the smallest span to make sure we |
| // reserve enough space in both orientations. |
| final Resources resources = getResources(); |
| int actualWidth = resources.getDimensionPixelSize(R.dimen.workspace_cell_width); |
| int actualHeight = resources.getDimensionPixelSize(R.dimen.workspace_cell_height); |
| int smallerSize = Math.min(actualWidth, actualHeight); |
| |
| // Always round up to next largest cell |
| int spanX = (width + smallerSize) / smallerSize; |
| int spanY = (height + smallerSize) / smallerSize; |
| |
| if (result == null) { |
| return new int[] { spanX, spanY }; |
| } |
| result[0] = spanX; |
| result[1] = spanY; |
| return result; |
| } |
| |
| /** |
| * 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) { |
| final int xCount = mCountX; |
| final int yCount = mCountY; |
| final boolean[][] occupied = mOccupied; |
| |
| findOccupiedCells(xCount, yCount, occupied, null, true); |
| |
| return findVacantCell(vacant, spanX, spanY, xCount, yCount, occupied); |
| } |
| |
| static boolean findVacantCell(int[] vacant, int spanX, int spanY, |
| int xCount, int yCount, boolean[][] occupied) { |
| |
| for (int x = 0; x < xCount; x++) { |
| for (int y = 0; y < yCount; y++) { |
| boolean available = !occupied[x][y]; |
| out: for (int i = x; i < x + spanX - 1 && x < xCount; i++) { |
| for (int j = y; j < y + spanY - 1 && y < yCount; j++) { |
| available = available && !occupied[i][j]; |
| if (!available) break out; |
| } |
| } |
| |
| if (available) { |
| vacant[0] = x; |
| vacant[1] = y; |
| return true; |
| } |
| } |
| } |
| |
| return false; |
| } |
| |
| /** |
| * Update the array of occupied cells (mOccupied), and return a flattened copy of the array. |
| */ |
| boolean[] getOccupiedCellsFlattened() { |
| final int xCount = mCountX; |
| final int yCount = mCountY; |
| final boolean[][] occupied = mOccupied; |
| |
| findOccupiedCells(xCount, yCount, occupied, null, true); |
| |
| final boolean[] flat = new boolean[xCount * yCount]; |
| for (int y = 0; y < yCount; y++) { |
| for (int x = 0; x < xCount; x++) { |
| flat[y * xCount + x] = occupied[x][y]; |
| } |
| } |
| |
| return flat; |
| } |
| |
| /** |
| * Update the array of occupied cells. |
| * @param ignoreView If non-null, the space occupied by this View is treated as vacant |
| * @param ignoreFolders If true, a cell occupied by a Folder is treated as vacant |
| */ |
| private void findOccupiedCells( |
| int xCount, int yCount, boolean[][] occupied, View ignoreView, boolean ignoreFolders) { |
| |
| for (int x = 0; x < xCount; x++) { |
| for (int y = 0; y < yCount; y++) { |
| occupied[x][y] = false; |
| } |
| } |
| |
| int count = getChildCount(); |
| for (int i = 0; i < count; i++) { |
| View child = getChildAt(i); |
| if ((ignoreFolders && child instanceof Folder) || child.equals(ignoreView)) { |
| continue; |
| } |
| LayoutParams lp = (LayoutParams) child.getLayoutParams(); |
| |
| for (int x = lp.cellX; x < lp.cellX + lp.cellHSpan && x < xCount; x++) { |
| for (int y = lp.cellY; y < lp.cellY + lp.cellVSpan && y < yCount; y++) { |
| occupied[x][y] = true; |
| } |
| } |
| } |
| } |
| |
| @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; |
| |
| /** |
| * Is this item currently being dragged |
| */ |
| public boolean isDragging; |
| |
| // X coordinate of the view in the layout. |
| @ViewDebug.ExportedProperty |
| int x; |
| // Y coordinate of the view in the layout. |
| @ViewDebug.ExportedProperty |
| int y; |
| |
| 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, |
| int hStartPadding, int vStartPadding) { |
| |
| final int myCellHSpan = cellHSpan; |
| final int myCellVSpan = cellVSpan; |
| final int myCellX = cellX; |
| final int myCellY = cellY; |
| |
| width = myCellHSpan * cellWidth + ((myCellHSpan - 1) * widthGap) - |
| leftMargin - rightMargin; |
| height = myCellVSpan * cellHeight + ((myCellVSpan - 1) * heightGap) - |
| topMargin - bottomMargin; |
| |
| x = hStartPadding + myCellX * (cellWidth + widthGap) + leftMargin; |
| y = vStartPadding + myCellY * (cellHeight + heightGap) + topMargin; |
| } |
| |
| public String toString() { |
| return "(" + this.cellX + ", " + this.cellY + ")"; |
| } |
| } |
| |
| static final class CellInfo implements ContextMenu.ContextMenuInfo { |
| private boolean[][] mOccupied; |
| private int mCountX; |
| private int mCountY; |
| View cell; |
| int cellX = -1; |
| int cellY = -1; |
| // intersectX and intersectY constrain the results of findCellForSpan; any empty space |
| // it results must include this point (unless intersectX and intersectY are -1) |
| int intersectX = -1; |
| int intersectY = -1; |
| int spanX; |
| int spanY; |
| int screen; |
| boolean valid; |
| |
| void updateOccupiedCells(boolean[][] occupied, int xCount, int yCount) { |
| mOccupied = occupied.clone(); |
| mCountX = xCount; |
| mCountY = yCount; |
| } |
| |
| void updateOccupiedCells(boolean[] occupied, int xCount, int yCount) { |
| if (mOccupied == null || mCountX != xCount || mCountY != yCount) { |
| mOccupied = new boolean[xCount][yCount]; |
| } |
| mCountX = xCount; |
| mCountY = yCount; |
| for (int y = 0; y < yCount; y++) { |
| for (int x = 0; x < xCount; x++) { |
| mOccupied[x][y] = occupied[y * xCount + x]; |
| } |
| } |
| } |
| |
| 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 the span represented by the CellInfo only there is no view there |
| // (this.cell == null) and there is enough space |
| |
| if (this.cell == null && this.spanX >= spanX && this.spanY >= spanY) { |
| if (cellXY != null) { |
| cellXY[0] = cellX; |
| cellXY[1] = cellY; |
| } |
| return 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)); |
| } |
| 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)); |
| } |
| |
| for (int x = startX; x < endX; x++) { |
| inner: |
| for (int y = startY; y < endY; y++) { |
| 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 below the row we just found |
| // an occupied cell |
| y += j; |
| continue inner; |
| } |
| } |
| } |
| if (cellXY != null) { |
| cellXY[0] = x; |
| cellXY[1] = y; |
| } |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| @Override |
| public String toString() { |
| return "Cell[view=" + (cell == null ? "null" : cell.getClass()) |
| + ", x=" + cellX + ", y=" + cellY + "]"; |
| } |
| } |
| |
| public boolean lastDownOnOccupiedCell() { |
| return mLastDownOnOccupiedCell; |
| } |
| } |