0dd21425bd
now with scriminsetwhatsitsface
141 lines
4.5 KiB
Java
Executable File
141 lines
4.5 KiB
Java
Executable File
package org.fox.ttrss.util;
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/*
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* Copyright 2014 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import android.content.Context;
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import android.content.res.TypedArray;
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import android.graphics.Canvas;
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import android.graphics.Rect;
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import android.graphics.drawable.Drawable;
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import android.support.v4.view.ViewCompat;
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import android.util.AttributeSet;
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import android.widget.FrameLayout;
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import org.fox.ttrss.R;
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/**
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* A layout that draws something in the insets passed to {@link #fitSystemWindows(Rect)}, i.e. the area above UI chrome
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* (status and navigation bars, overlay action bars).
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*/
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public class ScrimInsetsFrameLayout extends FrameLayout {
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private Drawable mInsetForeground;
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private Rect mInsets;
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private Rect mTempRect = new Rect();
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private OnInsetsCallback mOnInsetsCallback;
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public ScrimInsetsFrameLayout(Context context) {
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super(context);
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init(context, null, 0);
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}
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public ScrimInsetsFrameLayout(Context context, AttributeSet attrs) {
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super(context, attrs);
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init(context, attrs, 0);
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}
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public ScrimInsetsFrameLayout(Context context, AttributeSet attrs, int defStyle) {
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super(context, attrs, defStyle);
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init(context, attrs, defStyle);
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}
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private void init(Context context, AttributeSet attrs, int defStyle) {
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final TypedArray a = context.obtainStyledAttributes(attrs,
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R.styleable.ScrimInsetsView, defStyle, 0);
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if (a == null) {
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return;
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}
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mInsetForeground = a.getDrawable(R.styleable.ScrimInsetsView_insetForeground);
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a.recycle();
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setWillNotDraw(true);
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}
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@Override
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protected boolean fitSystemWindows(Rect insets) {
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mInsets = new Rect(insets);
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setWillNotDraw(mInsetForeground == null);
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ViewCompat.postInvalidateOnAnimation(this);
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if (mOnInsetsCallback != null) {
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mOnInsetsCallback.onInsetsChanged(insets);
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}
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return true; // consume insets
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}
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@Override
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public void draw(Canvas canvas) {
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super.draw(canvas);
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int width = getWidth();
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int height = getHeight();
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if (mInsets != null && mInsetForeground != null) {
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int sc = canvas.save();
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canvas.translate(getScrollX(), getScrollY());
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// Top
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mTempRect.set(0, 0, width, mInsets.top);
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mInsetForeground.setBounds(mTempRect);
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mInsetForeground.draw(canvas);
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// Bottom
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mTempRect.set(0, height - mInsets.bottom, width, height);
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mInsetForeground.setBounds(mTempRect);
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mInsetForeground.draw(canvas);
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// Left
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mTempRect.set(0, mInsets.top, mInsets.left, height - mInsets.bottom);
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mInsetForeground.setBounds(mTempRect);
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mInsetForeground.draw(canvas);
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// Right
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mTempRect.set(width - mInsets.right, mInsets.top, width, height - mInsets.bottom);
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mInsetForeground.setBounds(mTempRect);
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mInsetForeground.draw(canvas);
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canvas.restoreToCount(sc);
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}
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}
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@Override
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protected void onAttachedToWindow() {
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super.onAttachedToWindow();
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if (mInsetForeground != null) {
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mInsetForeground.setCallback(this);
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}
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}
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@Override
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protected void onDetachedFromWindow() {
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super.onDetachedFromWindow();
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if (mInsetForeground != null) {
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mInsetForeground.setCallback(null);
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}
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}
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/**
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* Allows the calling container to specify a callback for custom processing when insets change (i.e. when
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* {@link #fitSystemWindows(Rect)} is called. This is useful for setting padding on UI elements based on
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* UI chrome insets (e.g. a Google Map or a ListView). When using with ListView or GridView, remember to set
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* clipToPadding to false.
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*/
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public void setOnInsetsCallback(OnInsetsCallback onInsetsCallback) {
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mOnInsetsCallback = onInsetsCallback;
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}
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public static interface OnInsetsCallback {
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public void onInsetsChanged(Rect insets);
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}
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} |