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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.contacts;
import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.MeasureSpec;
public class ButtonGridLayout extends ViewGroup {
private final int mColumns = 3;
public ButtonGridLayout(Context context) {
super(context);
}
public ButtonGridLayout(Context context, AttributeSet attrs) {
super(context, attrs);
}
public ButtonGridLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
int y = mPaddingTop;
final int rows = getRows();
final View child0 = getChildAt(0);
final int yInc = (getHeight() - mPaddingTop - mPaddingBottom) / rows;
final int xInc = (getWidth() - mPaddingLeft - mPaddingRight) / mColumns;
final int childWidth = child0.getMeasuredWidth();
final int childHeight = child0.getMeasuredHeight();
final int xOffset = (xInc - childWidth) / 2;
final int yOffset = (yInc - childHeight) / 2;
for (int row = 0; row < rows; row++) {
int x = mPaddingLeft;
for (int col = 0; col < mColumns; col++) {
int cell = row * mColumns + col;
if (cell >= getChildCount()) {
break;
}
View child = getChildAt(cell);
child.layout(x + xOffset, y + yOffset,
x + xOffset + childWidth,
y + yOffset + childHeight);
x += xInc;
}
y += yInc;
}
}
private int getRows() {
return (getChildCount() + mColumns - 1) / mColumns;
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int width = mPaddingLeft + mPaddingRight;
int height = mPaddingTop + mPaddingBottom;
// Measure the first child and get it's size
View child = getChildAt(0);
child.measure(MeasureSpec.UNSPECIFIED , MeasureSpec.UNSPECIFIED);
int childWidth = child.getMeasuredWidth();
int childHeight = child.getMeasuredHeight();
// Make sure the other children are measured as well, to initialize
for (int i = 1; i < getChildCount(); i++) {
getChildAt(0).measure(MeasureSpec.UNSPECIFIED , MeasureSpec.UNSPECIFIED);
}
// All cells are going to be the size of the first child
width += mColumns * childWidth;
height += getRows() * childHeight;
width = resolveSize(width, widthMeasureSpec);
height = resolveSize(height, heightMeasureSpec);
setMeasuredDimension(width, height);
}
}
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