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/*
* Copyright (C) 2014 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.settings.dashboard;
import android.content.Context;
import android.content.res.Resources;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
import com.android.settings.R;
public class DashboardContainerView extends ViewGroup {
private float mCellGapX;
private float mCellGapY;
private int mNumRows;
private int mNumColumns;
public DashboardContainerView(Context context, AttributeSet attrs) {
super(context, attrs);
final Resources res = context.getResources();
mCellGapX = res.getDimension(R.dimen.dashboard_cell_gap_x);
mCellGapY = res.getDimension(R.dimen.dashboard_cell_gap_y);
mNumColumns = res.getInteger(R.integer.dashboard_num_columns);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
final int width = MeasureSpec.getSize(widthMeasureSpec);
final int availableWidth = (int) (width - getPaddingLeft() - getPaddingRight() -
(mNumColumns - 1) * mCellGapX);
float cellWidth = (float) Math.ceil(((float) availableWidth) / mNumColumns);
final int N = getChildCount();
int cellHeight = 0;
int cursor = 0;
for (int i = 0; i < N; ++i) {
DashboardTileView v = (DashboardTileView) getChildAt(i);
if (v.getVisibility() == View.GONE) {
continue;
}
ViewGroup.LayoutParams lp = v.getLayoutParams();
int colSpan = v.getColumnSpan();
lp.width = (int) ((colSpan * cellWidth) + (colSpan - 1) * mCellGapX);
// Measure the child
int newWidthSpec = getChildMeasureSpec(widthMeasureSpec, 0, lp.width);
int newHeightSpec = getChildMeasureSpec(heightMeasureSpec, 0, lp.height);
v.measure(newWidthSpec, newHeightSpec);
// Save the cell height
if (cellHeight <= 0) {
cellHeight = v.getMeasuredHeight();
}
lp.height = cellHeight;
cursor += colSpan;
}
mNumRows = (int) Math.ceil((float) cursor / mNumColumns);
final int newHeight = (int) ((mNumRows * cellHeight) + ((mNumRows - 1) * mCellGapY)) +
getPaddingTop() + getPaddingBottom();
setMeasuredDimension(width, newHeight);
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
final int N = getChildCount();
final boolean isLayoutRtl = isLayoutRtl();
final int width = getWidth();
int x = getPaddingStart();
int y = getPaddingTop();
int cursor = 0;
for (int i = 0; i < N; ++i) {
final DashboardTileView child = (DashboardTileView) getChildAt(i);
final ViewGroup.LayoutParams lp = child.getLayoutParams();
if (child.getVisibility() == GONE) {
continue;
}
final int col = cursor % mNumColumns;
final int colSpan = child.getColumnSpan();
final int childWidth = lp.width;
final int childHeight = lp.height;
int row = cursor / mNumColumns;
if (row == mNumRows - 1) {
child.setDividerVisibility(false);
}
// Push the item to the next row if it can't fit on this one
if ((col + colSpan) > mNumColumns) {
x = getPaddingStart();
y += childHeight + mCellGapY;
row++;
}
final int childLeft = (isLayoutRtl) ? width - x - childWidth : x;
final int childRight = childLeft + childWidth;
final int childTop = y;
final int childBottom = childTop + childHeight;
// Layout the container
child.layout(childLeft, childTop, childRight, childBottom);
// Offset the position by the cell gap or reset the position and cursor when we
// reach the end of the row
cursor += child.getColumnSpan();
if (cursor < (((row + 1) * mNumColumns))) {
x += childWidth + mCellGapX;
} else {
x = getPaddingStart();
y += childHeight + mCellGapY;
}
}
}
}
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