| /* |
| * Copyright (C) 2011 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.settings.widget; |
| |
| import android.content.Context; |
| import android.content.res.TypedArray; |
| import android.graphics.Rect; |
| import android.util.AttributeSet; |
| import android.view.Gravity; |
| import android.view.View; |
| import android.view.ViewDebug; |
| import android.widget.FrameLayout; |
| |
| import com.android.internal.util.Preconditions; |
| import com.android.settings.R; |
| |
| /** |
| * Container for two-dimensional chart, drawn with a combination of |
| * {@link ChartGridView}, {@link ChartNetworkSeriesView} and {@link ChartSweepView} |
| * children. The entire chart uses {@link ChartAxis} to map between raw values |
| * and screen coordinates. |
| */ |
| public class ChartView extends FrameLayout { |
| // TODO: extend something that supports two-dimensional scrolling |
| |
| private static final int SWEEP_GRAVITY = Gravity.TOP | Gravity.START; |
| |
| ChartAxis mHoriz; |
| ChartAxis mVert; |
| |
| @ViewDebug.ExportedProperty |
| private int mOptimalWidth = -1; |
| private float mOptimalWidthWeight = 0; |
| |
| private Rect mContent = new Rect(); |
| |
| public ChartView(Context context) { |
| this(context, null, 0); |
| } |
| |
| public ChartView(Context context, AttributeSet attrs) { |
| this(context, attrs, 0); |
| } |
| |
| public ChartView(Context context, AttributeSet attrs, int defStyle) { |
| super(context, attrs, defStyle); |
| |
| final TypedArray a = context.obtainStyledAttributes( |
| attrs, R.styleable.ChartView, defStyle, 0); |
| setOptimalWidth(a.getDimensionPixelSize(R.styleable.ChartView_optimalWidth, -1), |
| a.getFloat(R.styleable.ChartView_optimalWidthWeight, 0)); |
| a.recycle(); |
| |
| setClipToPadding(false); |
| setClipChildren(false); |
| } |
| |
| void init(ChartAxis horiz, ChartAxis vert) { |
| mHoriz = Preconditions.checkNotNull(horiz, "missing horiz"); |
| mVert = Preconditions.checkNotNull(vert, "missing vert"); |
| } |
| |
| public void setOptimalWidth(int optimalWidth, float optimalWidthWeight) { |
| mOptimalWidth = optimalWidth; |
| mOptimalWidthWeight = optimalWidthWeight; |
| requestLayout(); |
| } |
| |
| @Override |
| protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { |
| super.onMeasure(widthMeasureSpec, heightMeasureSpec); |
| |
| final int slack = getMeasuredWidth() - mOptimalWidth; |
| if (mOptimalWidth > 0 && slack > 0) { |
| final int targetWidth = (int) (mOptimalWidth + (slack * mOptimalWidthWeight)); |
| widthMeasureSpec = MeasureSpec.makeMeasureSpec(targetWidth, MeasureSpec.EXACTLY); |
| super.onMeasure(widthMeasureSpec, heightMeasureSpec); |
| } |
| } |
| |
| @Override |
| protected void onLayout(boolean changed, int l, int t, int r, int b) { |
| mContent.set(getPaddingLeft(), getPaddingTop(), r - l - getPaddingRight(), |
| b - t - getPaddingBottom()); |
| final int width = mContent.width(); |
| final int height = mContent.height(); |
| |
| // no scrolling yet, so tell dimensions to fill exactly |
| mHoriz.setSize(width); |
| mVert.setSize(height); |
| |
| final Rect parentRect = new Rect(); |
| final Rect childRect = new Rect(); |
| |
| for (int i = 0; i < getChildCount(); i++) { |
| final View child = getChildAt(i); |
| final LayoutParams params = (LayoutParams) child.getLayoutParams(); |
| |
| parentRect.set(mContent); |
| |
| if (child instanceof ChartNetworkSeriesView) { |
| // series are always laid out to fill entire graph area |
| // TODO: handle scrolling for series larger than content area |
| Gravity.apply(params.gravity, width, height, parentRect, childRect); |
| child.layout(childRect.left, childRect.top, childRect.right, childRect.bottom); |
| |
| } else if (child instanceof ChartGridView) { |
| // Grid uses some extra room for labels |
| Gravity.apply(params.gravity, width, height, parentRect, childRect); |
| child.layout(childRect.left, childRect.top, childRect.right, |
| childRect.bottom + child.getPaddingBottom()); |
| |
| } else if (child instanceof ChartSweepView) { |
| layoutSweep((ChartSweepView) child, parentRect, childRect); |
| child.layout(childRect.left, childRect.top, childRect.right, childRect.bottom); |
| } |
| } |
| } |
| |
| protected void layoutSweep(ChartSweepView sweep) { |
| final Rect parentRect = new Rect(mContent); |
| final Rect childRect = new Rect(); |
| |
| layoutSweep(sweep, parentRect, childRect); |
| sweep.layout(childRect.left, childRect.top, childRect.right, childRect.bottom); |
| } |
| |
| protected void layoutSweep(ChartSweepView sweep, Rect parentRect, Rect childRect) { |
| final Rect sweepMargins = sweep.getMargins(); |
| |
| // sweep is always placed along specific dimension |
| if (sweep.getFollowAxis() == ChartSweepView.VERTICAL) { |
| parentRect.top += sweepMargins.top + (int) sweep.getPoint(); |
| parentRect.bottom = parentRect.top; |
| parentRect.left += sweepMargins.left; |
| parentRect.right += sweepMargins.right; |
| Gravity.apply(SWEEP_GRAVITY, parentRect.width(), sweep.getMeasuredHeight(), |
| parentRect, childRect); |
| |
| } else { |
| parentRect.left += sweepMargins.left + (int) sweep.getPoint(); |
| parentRect.right = parentRect.left; |
| parentRect.top += sweepMargins.top; |
| parentRect.bottom += sweepMargins.bottom; |
| Gravity.apply(SWEEP_GRAVITY, sweep.getMeasuredWidth(), parentRect.height(), |
| parentRect, childRect); |
| } |
| } |
| } |