diff options
Diffstat (limited to 'src/com/android/launcher3/PagedViewCellLayoutChildren.java')
-rw-r--r-- | src/com/android/launcher3/PagedViewCellLayoutChildren.java | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/src/com/android/launcher3/PagedViewCellLayoutChildren.java b/src/com/android/launcher3/PagedViewCellLayoutChildren.java new file mode 100644 index 000000000..c9e108d98 --- /dev/null +++ b/src/com/android/launcher3/PagedViewCellLayoutChildren.java @@ -0,0 +1,160 @@ +/* + * Copyright (C) 2010 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.launcher3; + +import android.content.Context; +import android.graphics.Rect; +import android.view.View; +import android.view.ViewGroup; + +/** + * An abstraction of the original CellLayout which supports laying out items + * which span multiple cells into a grid-like layout. Also supports dimming + * to give a preview of its contents. + */ +public class PagedViewCellLayoutChildren extends ViewGroup { + static final String TAG = "PagedViewCellLayout"; + + private boolean mCenterContent; + + private int mCellWidth; + private int mCellHeight; + private int mWidthGap; + private int mHeightGap; + + public PagedViewCellLayoutChildren(Context context) { + super(context); + } + + @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 setGap(int widthGap, int heightGap) { + mWidthGap = widthGap; + mHeightGap = heightGap; + requestLayout(); + } + + public void setCellDimensions(int width, int height) { + mCellWidth = width; + mCellHeight = height; + requestLayout(); + } + + @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 onMeasure(int widthMeasureSpec, int heightMeasureSpec) { + 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 count = getChildCount(); + for (int i = 0; i < count; i++) { + View child = getChildAt(i); + PagedViewCellLayout.LayoutParams lp = + (PagedViewCellLayout.LayoutParams) child.getLayoutParams(); + lp.setup(mCellWidth, mCellHeight, mWidthGap, mHeightGap, + getPaddingLeft(), + getPaddingTop()); + + 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(); + + int offsetX = 0; + if (mCenterContent && count > 0) { + // determine the max width of all the rows and center accordingly + int maxRowX = 0; + int minRowX = Integer.MAX_VALUE; + for (int i = 0; i < count; i++) { + View child = getChildAt(i); + if (child.getVisibility() != GONE) { + PagedViewCellLayout.LayoutParams lp = + (PagedViewCellLayout.LayoutParams) child.getLayoutParams(); + minRowX = Math.min(minRowX, lp.x); + maxRowX = Math.max(maxRowX, lp.x + lp.width); + } + } + int maxRowWidth = maxRowX - minRowX; + offsetX = (getMeasuredWidth() - maxRowWidth) / 2; + } + + for (int i = 0; i < count; i++) { + View child = getChildAt(i); + if (child.getVisibility() != GONE) { + PagedViewCellLayout.LayoutParams lp = + (PagedViewCellLayout.LayoutParams) child.getLayoutParams(); + + int childLeft = offsetX + lp.x; + int childTop = lp.y; + child.layout(childLeft, childTop, childLeft + lp.width, childTop + lp.height); + } + } + } + + public void enableCenteredContent(boolean enabled) { + mCenterContent = enabled; + } + + @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); + } + } + } +} |