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/*
* 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 android.preference;
import android.content.Context;
import android.content.res.TypedArray;
import android.util.AttributeSet;
import android.view.View;
import android.widget.FrameLayout;
/**
* @hide
*/
public class PreferenceFrameLayout extends FrameLayout {
private static final int DEFAULT_BORDER_TOP = 0;
private static final int DEFAULT_BORDER_BOTTOM = 0;
private static final int DEFAULT_BORDER_LEFT = 0;
private static final int DEFAULT_BORDER_RIGHT = 0;
private final int mBorderTop;
private final int mBorderBottom;
private final int mBorderLeft;
private final int mBorderRight;
private boolean mPaddingApplied;
public PreferenceFrameLayout(Context context) {
this(context, null);
}
public PreferenceFrameLayout(Context context, AttributeSet attrs) {
this(context, attrs, com.android.internal.R.attr.preferenceFrameLayoutStyle);
}
public PreferenceFrameLayout(Context context, AttributeSet attrs, int defStyleAttr) {
this(context, attrs, defStyleAttr, 0);
}
public PreferenceFrameLayout(
Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
final TypedArray a = context.obtainStyledAttributes(attrs,
com.android.internal.R.styleable.PreferenceFrameLayout, defStyleAttr, defStyleRes);
float density = context.getResources().getDisplayMetrics().density;
int defaultBorderTop = (int) (density * DEFAULT_BORDER_TOP + 0.5f);
int defaultBottomPadding = (int) (density * DEFAULT_BORDER_BOTTOM + 0.5f);
int defaultLeftPadding = (int) (density * DEFAULT_BORDER_LEFT + 0.5f);
int defaultRightPadding = (int) (density * DEFAULT_BORDER_RIGHT + 0.5f);
mBorderTop = a.getDimensionPixelSize(
com.android.internal.R.styleable.PreferenceFrameLayout_borderTop,
defaultBorderTop);
mBorderBottom = a.getDimensionPixelSize(
com.android.internal.R.styleable.PreferenceFrameLayout_borderBottom,
defaultBottomPadding);
mBorderLeft = a.getDimensionPixelSize(
com.android.internal.R.styleable.PreferenceFrameLayout_borderLeft,
defaultLeftPadding);
mBorderRight = a.getDimensionPixelSize(
com.android.internal.R.styleable.PreferenceFrameLayout_borderRight,
defaultRightPadding);
a.recycle();
}
/**
* {@inheritDoc}
*/
@Override
public LayoutParams generateLayoutParams(AttributeSet attrs) {
return new LayoutParams(getContext(), attrs);
}
@Override
public void addView(View child) {
int borderTop = getPaddingTop();
int borderBottom = getPaddingBottom();
int borderLeft = getPaddingLeft();
int borderRight = getPaddingRight();
android.view.ViewGroup.LayoutParams params = child.getLayoutParams();
LayoutParams layoutParams = params instanceof PreferenceFrameLayout.LayoutParams
? (PreferenceFrameLayout.LayoutParams) child.getLayoutParams() : null;
// Check on the id of the child before adding it.
if (layoutParams != null && layoutParams.removeBorders) {
if (mPaddingApplied) {
borderTop -= mBorderTop;
borderBottom -= mBorderBottom;
borderLeft -= mBorderLeft;
borderRight -= mBorderRight;
mPaddingApplied = false;
}
} else {
// Add the padding to the view group after determining if the
// padding already exists.
if (!mPaddingApplied) {
borderTop += mBorderTop;
borderBottom += mBorderBottom;
borderLeft += mBorderLeft;
borderRight += mBorderRight;
mPaddingApplied = true;
}
}
int previousTop = getPaddingTop();
int previousBottom = getPaddingBottom();
int previousLeft = getPaddingLeft();
int previousRight = getPaddingRight();
if (previousTop != borderTop || previousBottom != borderBottom
|| previousLeft != borderLeft || previousRight != borderRight) {
setPadding(borderLeft, borderTop, borderRight, borderBottom);
}
super.addView(child);
}
public static class LayoutParams extends FrameLayout.LayoutParams {
public boolean removeBorders = false;
/**
* {@inheritDoc}
*/
public LayoutParams(Context c, AttributeSet attrs) {
super(c, attrs);
TypedArray a = c.obtainStyledAttributes(attrs,
com.android.internal.R.styleable.PreferenceFrameLayout_Layout);
removeBorders = a.getBoolean(
com.android.internal.R.styleable.PreferenceFrameLayout_Layout_layout_removeBorders,
false);
a.recycle();
}
/**
* {@inheritDoc}
*/
public LayoutParams(int width, int height) {
super(width, height);
}
}
}
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