PreferenceFrameLayout.java

package org.holoeverywhere.preference;

import org.holoeverywhere.widget.FrameLayout;

import android.content.Context;
import android.content.res.TypedArray;
import android.util.AttributeSet;
import android.view.View;

public class PreferenceFrameLayout extends FrameLayout {
    public static class LayoutParams extends FrameLayout.LayoutParams {
        public boolean removeBorders = false;

        public LayoutParams(Context c, AttributeSet attrs) {
            super(c, attrs);
            TypedArray a = c.obtainStyledAttributes(attrs,
                    R.styleable.PreferenceFrameLayout_Layout);
            removeBorders = a
                    .getBoolean(
                            R.styleable.PreferenceFrameLayout_Layout_layout_removeBorders,
                            false);
            a.recycle();
        }

        public LayoutParams(int width, int height) {
            super(width, height);
        }
    }

    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 static final int DEFAULT_BORDER_TOP = 0;
    private final int mBorderBottom;
    private final int mBorderLeft;
    private final int mBorderRight;
    private final int mBorderTop;

    private boolean mPaddingApplied;

    public PreferenceFrameLayout(Context context) {
        this(context, null);
    }

    public PreferenceFrameLayout(Context context, AttributeSet attrs) {
        this(context, attrs, R.attr.preferenceFrameLayoutStyle);
    }

    public PreferenceFrameLayout(Context context, AttributeSet attrs,
            int defStyle) {
        super(context, attrs, defStyle);
        TypedArray a = context.obtainStyledAttributes(attrs,
                R.styleable.PreferenceFrameLayout, defStyle, 0);
        float density = context.getResources().getDisplayMetrics().density;
        int defaultBorderTop = (int) (density
                * PreferenceFrameLayout.DEFAULT_BORDER_TOP + 0.5f);
        int defaultBottomPadding = (int) (density
                * PreferenceFrameLayout.DEFAULT_BORDER_BOTTOM + 0.5f);
        int defaultLeftPadding = (int) (density
                * PreferenceFrameLayout.DEFAULT_BORDER_LEFT + 0.5f);
        int defaultRightPadding = (int) (density
                * PreferenceFrameLayout.DEFAULT_BORDER_RIGHT + 0.5f);
        mBorderTop = a.getDimensionPixelSize(
                R.styleable.PreferenceFrameLayout_borderTop, defaultBorderTop);
        mBorderBottom = a.getDimensionPixelSize(
                R.styleable.PreferenceFrameLayout_borderBottom,
                defaultBottomPadding);
        mBorderLeft = a.getDimensionPixelSize(
                R.styleable.PreferenceFrameLayout_borderLeft,
                defaultLeftPadding);
        mBorderRight = a.getDimensionPixelSize(
                R.styleable.PreferenceFrameLayout_borderRight,
                defaultRightPadding);
        a.recycle();
    }

    @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;
        if (layoutParams != null && layoutParams.removeBorders) {
            if (mPaddingApplied) {
                borderTop -= mBorderTop;
                borderBottom -= mBorderBottom;
                borderLeft -= mBorderLeft;
                borderRight -= mBorderRight;
                mPaddingApplied = false;
            }
        } else {
            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);
    }

    @Override
    public LayoutParams generateLayoutParams(AttributeSet attrs) {
        return new LayoutParams(getContext(), attrs);
    }
}