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/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.launcher2;
import java.util.ArrayList;
import android.app.WallpaperManager;
import android.content.Context;
import android.graphics.Rect;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
public class CellLayoutChildren extends ViewGroup {
static final String TAG = "CellLayoutChildren";
// These are temporary variables to prevent having to allocate a new object just to
// return an (x, y) value from helper functions. Do NOT use them to maintain other state.
private final int[] mTmpCellXY = new int[2];
private final WallpaperManager mWallpaperManager;
private int mLeftPadding;
private int mTopPadding;
private int mCellWidth;
private int mCellHeight;
private int mWidthGap;
private int mHeightGap;
public CellLayoutChildren(Context context) {
super(context);
mWallpaperManager = WallpaperManager.getInstance(context);
setLayerType(LAYER_TYPE_HARDWARE, null);
}
public void setCellDimensions(int cellWidth, int cellHeight,
int leftPadding, int topPadding, int widthGap, int heightGap ) {
mCellWidth = cellWidth;
mCellHeight = cellHeight;
mLeftPadding = leftPadding;
mTopPadding = topPadding;
mWidthGap = widthGap;
mHeightGap = heightGap;
}
public View getChildAt(int x, int y) {
final int count = getChildCount();
for (int i = 0; i < count; i++) {
View child = getChildAt(i);
CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams();
if ((lp.cellX <= x) && (x < lp.cellX + lp.cellHSpan) &&
(lp.cellY <= y) && (y < lp.cellY + lp.cellVSpan)) {
return child;
}
}
return null;
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int count = getChildCount();
for (int i = 0; i < count; i++) {
View child = getChildAt(i);
measureChild(child);
}
int widthSpecSize = MeasureSpec.getSize(widthMeasureSpec);
int heightSpecSize = MeasureSpec.getSize(heightMeasureSpec);
setMeasuredDimension(widthSpecSize, heightSpecSize);
}
public void measureChild(View child) {
final int cellWidth = mCellWidth;
final int cellHeight = mCellHeight;
CellLayout.LayoutParams lp = (CellLayout.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);
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
int count = getChildCount();
for (int i = 0; i < count; i++) {
final 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(),
WallpaperManager.COMMAND_DROP,
cellXY[0] + childLeft + lp.width / 2,
cellXY[1] + childTop + lp.height / 2, 0, null);
if (lp.animateDrop) {
lp.animateDrop = false;
// This call does not result in a requestLayout(), but at one point did.
// We need to be cautious about any method calls within the layout pass
// to insure we don't leave the view tree in a bad state.
((Workspace) mParent.getParent()).animateViewIntoPosition(child);
}
}
}
}
}
@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
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();
}
}
@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
if (!view.isHardwareAccelerated()) {
view.buildDrawingCache(true);
}
}
}
@Override
protected void setChildrenDrawnWithCacheEnabled(boolean enabled) {
super.setChildrenDrawnWithCacheEnabled(enabled);
}
}
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