| package com.android.launcher3; |
| |
| import android.content.Context; |
| import android.content.res.TypedArray; |
| import android.graphics.Rect; |
| import android.util.AttributeSet; |
| import android.view.View; |
| import android.view.ViewDebug; |
| import android.view.ViewGroup; |
| import android.widget.FrameLayout; |
| |
| public class InsettableFrameLayout extends FrameLayout implements Insettable { |
| |
| @ViewDebug.ExportedProperty(category = "launcher") |
| protected Rect mInsets = new Rect(); |
| |
| public Rect getInsets() { |
| return mInsets; |
| } |
| |
| public InsettableFrameLayout(Context context, AttributeSet attrs) { |
| super(context, attrs); |
| } |
| |
| public void setFrameLayoutChildInsets(View child, Rect newInsets, Rect oldInsets) { |
| final LayoutParams lp = (LayoutParams) child.getLayoutParams(); |
| |
| if (child instanceof Insettable) { |
| ((Insettable) child).setInsets(newInsets); |
| } else if (!lp.ignoreInsets) { |
| lp.topMargin += (newInsets.top - oldInsets.top); |
| lp.leftMargin += (newInsets.left - oldInsets.left); |
| lp.rightMargin += (newInsets.right - oldInsets.right); |
| lp.bottomMargin += (newInsets.bottom - oldInsets.bottom); |
| } |
| child.setLayoutParams(lp); |
| } |
| |
| @Override |
| public void setInsets(Rect insets) { |
| final int n = getChildCount(); |
| for (int i = 0; i < n; i++) { |
| final View child = getChildAt(i); |
| setFrameLayoutChildInsets(child, insets, mInsets); |
| } |
| mInsets.set(insets); |
| } |
| |
| @Override |
| public LayoutParams generateLayoutParams(AttributeSet attrs) { |
| return new InsettableFrameLayout.LayoutParams(getContext(), attrs); |
| } |
| |
| @Override |
| protected LayoutParams generateDefaultLayoutParams() { |
| return new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); |
| } |
| |
| // Override to allow type-checking of LayoutParams. |
| @Override |
| protected boolean checkLayoutParams(ViewGroup.LayoutParams p) { |
| return p instanceof InsettableFrameLayout.LayoutParams; |
| } |
| |
| @Override |
| protected LayoutParams generateLayoutParams(ViewGroup.LayoutParams p) { |
| return new LayoutParams(p); |
| } |
| |
| public static class LayoutParams extends FrameLayout.LayoutParams { |
| public boolean ignoreInsets = false; |
| |
| public LayoutParams(Context c, AttributeSet attrs) { |
| super(c, attrs); |
| TypedArray a = c.obtainStyledAttributes(attrs, |
| R.styleable.InsettableFrameLayout_Layout); |
| ignoreInsets = a.getBoolean( |
| R.styleable.InsettableFrameLayout_Layout_layout_ignoreInsets, false); |
| a.recycle(); |
| } |
| |
| public LayoutParams(int width, int height) { |
| super(width, height); |
| } |
| |
| public LayoutParams(ViewGroup.LayoutParams lp) { |
| super(lp); |
| } |
| } |
| |
| @Override |
| public void onViewAdded(View child) { |
| super.onViewAdded(child); |
| setFrameLayoutChildInsets(child, mInsets, new Rect()); |
| } |
| |
| public static void dispatchInsets(ViewGroup parent, Rect insets) { |
| final int n = parent.getChildCount(); |
| for (int i = 0; i < n; i++) { |
| final View child = parent.getChildAt(i); |
| if (child instanceof Insettable) { |
| ((Insettable) child).setInsets(insets); |
| } |
| } |
| } |
| } |