mirror of
https://github.com/LawnchairLauncher/lawnchair.git
synced 2026-02-19 18:58:19 +00:00
Adding workaround for page indicators to support many pages.
- Tweaking assets until we get something proper Change-Id: Ie07946acb529ff747d76896ff38837f8db6a7258
This commit is contained in:
Winson Chung
@@ -19,6 +19,7 @@ package com.android.launcher3;
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import android.animation.Animator;
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import android.animation.AnimatorListenerAdapter;
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import android.animation.LayoutTransition;
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import android.animation.TimeInterpolator;
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import android.content.ComponentName;
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import android.content.Context;
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import android.content.res.Configuration;
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@@ -37,8 +38,22 @@ import java.util.ArrayList;
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public class PageIndicator extends LinearLayout {
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@SuppressWarnings("unused")
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private static final String TAG = "PageIndicator";
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// Want this to look good? Keep it odd
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private static final boolean MODULATE_ALPHA_ENABLED = false;
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private LayoutInflater mLayoutInflater;
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private int[] mWindowRange = new int[2];
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private int mMaxWindowSize;
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private ArrayList<PageIndicatorMarker> mMarkers =
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new ArrayList<PageIndicatorMarker>();
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private int mActiveMarkerIndex;
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private TimeInterpolator mAlphaInterpolator = new TimeInterpolator() {
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public float getInterpolation(float t) {
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return t;
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}
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};
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public PageIndicator(Context context) {
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this(context, null);
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@@ -50,16 +65,110 @@ public class PageIndicator extends LinearLayout {
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public PageIndicator(Context context, AttributeSet attrs, int defStyle) {
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super(context, attrs, defStyle);
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TypedArray a = context.obtainStyledAttributes(attrs,
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R.styleable.PageIndicator, defStyle, 0);
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mMaxWindowSize = a.getInteger(R.styleable.PageIndicator_windowSize, 15);
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mWindowRange[0] = 0;
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mWindowRange[1] = 0;
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mLayoutInflater = LayoutInflater.from(context);
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a.recycle();
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// Set the layout transition properties
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LayoutTransition transition = getLayoutTransition();
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transition.setDuration(250);
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transition.setDuration(175);
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}
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private void enableLayoutTransitions() {
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LayoutTransition transition = getLayoutTransition();
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transition.enableTransitionType(LayoutTransition.APPEARING);
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transition.enableTransitionType(LayoutTransition.DISAPPEARING);
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transition.enableTransitionType(LayoutTransition.CHANGE_APPEARING);
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transition.enableTransitionType(LayoutTransition.CHANGE_DISAPPEARING);
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}
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private void disableLayoutTransitions() {
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LayoutTransition transition = getLayoutTransition();
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transition.disableTransitionType(LayoutTransition.APPEARING);
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transition.disableTransitionType(LayoutTransition.DISAPPEARING);
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transition.disableTransitionType(LayoutTransition.CHANGE_APPEARING);
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transition.disableTransitionType(LayoutTransition.CHANGE_DISAPPEARING);
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}
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void offsetWindowCenterTo(int activeIndex, boolean allowAnimations) {
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if (activeIndex < 0) {
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new Throwable().printStackTrace();
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}
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int windowSize = Math.min(mMarkers.size(), mMaxWindowSize);
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int hWindowSize = (int) windowSize / 2;
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float hfWindowSize = windowSize / 2f;
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int windowStart = Math.max(0, activeIndex - hWindowSize);
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int windowEnd = Math.min(mMarkers.size(), windowStart + mMaxWindowSize);
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windowStart = windowEnd - Math.min(mMarkers.size(), windowSize);
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int windowMid = windowStart + (windowEnd - windowStart) / 2;
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boolean windowAtStart = (windowStart == 0);
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boolean windowAtEnd = (windowEnd == mMarkers.size());
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boolean windowMoved = (mWindowRange[0] != windowStart) ||
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(mWindowRange[1] != windowEnd);
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if (!allowAnimations) {
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disableLayoutTransitions();
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}
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// Remove all the previous children that are no longer in the window
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for (int i = getChildCount() - 1; i >= 0; --i) {
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PageIndicatorMarker marker = (PageIndicatorMarker) getChildAt(i);
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int markerIndex = mMarkers.indexOf(marker);
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if (markerIndex < windowStart || markerIndex >= windowEnd) {
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removeView(marker);
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}
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}
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// Add all the new children that belong in the window
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for (int i = 0; i < mMarkers.size(); ++i) {
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PageIndicatorMarker marker = (PageIndicatorMarker) mMarkers.get(i);
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if (windowStart <= i && i < windowEnd) {
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if (indexOfChild(marker) < 0) {
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addView(marker, i - windowStart);
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}
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if (i == activeIndex) {
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marker.activate(windowMoved);
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} else {
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marker.inactivate(windowMoved);
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}
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} else {
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marker.inactivate(true);
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}
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if (MODULATE_ALPHA_ENABLED) {
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// Update the marker's alpha
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float alpha = 1f;
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if (mMarkers.size() > windowSize) {
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if ((windowAtStart && i > hWindowSize) ||
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(windowAtEnd && i < (mMarkers.size() - hWindowSize)) ||
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(!windowAtStart && !windowAtEnd)) {
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alpha = 1f - Math.abs((i - windowMid) / hfWindowSize);
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}
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}
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marker.animate().alpha(alpha).setDuration(500).start();
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}
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}
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if (!allowAnimations) {
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enableLayoutTransitions();
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}
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mWindowRange[0] = windowStart;
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mWindowRange[1] = windowEnd;
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}
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void addMarker(int index) {
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index = Math.max(0, Math.min(index, getChildCount()));
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View marker = mLayoutInflater.inflate(R.layout.page_indicator_marker, this, false);
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addView(marker, index);
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index = Math.max(0, Math.min(index, mMarkers.size()));
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int mLayoutId = R.layout.page_indicator_marker;
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PageIndicatorMarker marker =
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(PageIndicatorMarker) mLayoutInflater.inflate(mLayoutId, this, false);
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mMarkers.add(index, marker);
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offsetWindowCenterTo(mActiveMarkerIndex, true);
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}
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void addMarkers(int count) {
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for (int i = 0; i < count; ++i) {
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@@ -68,25 +177,37 @@ public class PageIndicator extends LinearLayout {
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}
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void removeMarker(int index) {
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if (getChildCount() > 0) {
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index = Math.max(0, Math.min(index, getChildCount() - 1));
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removeViewAt(index);
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if (mMarkers.size() > 0) {
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index = Math.max(0, Math.min(mMarkers.size() - 1, index));
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mMarkers.remove(index);
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offsetWindowCenterTo(mActiveMarkerIndex, true);
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}
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}
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void removeAllMarkers() {
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while (getChildCount() > 0) {
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while (mMarkers.size() > 0) {
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removeMarker(Integer.MAX_VALUE);
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}
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}
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void setActiveMarker(int index) {
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for (int i = 0; i < getChildCount(); ++i) {
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PageIndicatorMarker marker = (PageIndicatorMarker) getChildAt(i);
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if (index == i) {
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marker.activate();
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} else {
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marker.inactivate();
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}
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// Center the active marker
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mActiveMarkerIndex = index;
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offsetWindowCenterTo(index, false);
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}
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void dumpState(String txt) {
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System.out.println(txt);
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System.out.println("\tmMarkers: " + mMarkers.size());
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for (int i = 0; i < mMarkers.size(); ++i) {
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PageIndicatorMarker m = mMarkers.get(i);
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System.out.println("\t\t(" + i + ") " + m);
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}
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System.out.println("\twindow: [" + mWindowRange[0] + ", " + mWindowRange[1] + "]");
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System.out.println("\tchildren: " + getChildCount());
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for (int i = 0; i < getChildCount(); ++i) {
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PageIndicatorMarker m = (PageIndicatorMarker) getChildAt(i);
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System.out.println("\t\t(" + i + ") " + m);
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}
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System.out.println("\tactive: " + mActiveMarkerIndex);
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}
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}
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