mirror of https://github.com/NekoX-Dev/NekoX.git
131 lines
4.0 KiB
Java
131 lines
4.0 KiB
Java
/*
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* This is the source code of Telegram for Android v. 5.x.x.
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* It is licensed under GNU GPL v. 2 or later.
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* You should have received a copy of the license in this archive (see LICENSE).
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*
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* Copyright Nikolai Kudashov, 2013-2018.
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*/
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package org.telegram.ui.Components;
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import android.content.Context;
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import android.graphics.Canvas;
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import android.graphics.Paint;
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import android.graphics.Typeface;
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import android.util.TypedValue;
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import android.view.Gravity;
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import android.view.View;
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import android.view.animation.DecelerateInterpolator;
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import android.widget.LinearLayout;
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import android.widget.TextView;
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import org.telegram.messenger.AndroidUtilities;
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import org.telegram.ui.ActionBar.Theme;
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public class SlidingTabView extends LinearLayout {
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public interface SlidingTabViewDelegate {
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void didSelectTab(int tab);
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}
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private SlidingTabViewDelegate delegate;
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private int selectedTab = 0;
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private int tabCount = 0;
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private float tabWidth = 0;
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private float tabX = 0;
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private float animateTabXTo = 0;
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private Paint paint = new Paint();
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private long startAnimationTime = 0;
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private long totalAnimationDiff = 0;
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private float startAnimationX = 0;
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private DecelerateInterpolator interpolator;
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public SlidingTabView(Context context) {
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super(context);
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setOrientation(HORIZONTAL);
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setWeightSum(100);
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paint.setColor(0xffffffff);
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setWillNotDraw(false);
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interpolator = new DecelerateInterpolator();
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}
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public void addTextTab(final int position, String title) {
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TextView tab = new TextView(getContext());
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tab.setText(title);
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tab.setFocusable(true);
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tab.setGravity(Gravity.CENTER);
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tab.setSingleLine();
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tab.setTextColor(0xffffffff);
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tab.setTextSize(TypedValue.COMPLEX_UNIT_DIP, 14);
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tab.setTypeface(Typeface.DEFAULT_BOLD);
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tab.setBackgroundDrawable(Theme.createSelectorDrawable(Theme.ACTION_BAR_PICKER_SELECTOR_COLOR, 0));
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tab.setOnClickListener(new OnClickListener() {
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@Override
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public void onClick(View v) {
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didSelectTab(position);
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}
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});
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addView(tab);
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LayoutParams layoutParams = (LayoutParams)tab.getLayoutParams();
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layoutParams.height = LayoutHelper.MATCH_PARENT;
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layoutParams.width = 0;
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layoutParams.weight = 50;
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tab.setLayoutParams(layoutParams);
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tabCount++;
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}
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public void setDelegate(SlidingTabViewDelegate delegate) {
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this.delegate = delegate;
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}
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public int getSeletedTab() {
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return selectedTab;
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}
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private void didSelectTab(int tab) {
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if (selectedTab == tab) {
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return;
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}
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selectedTab = tab;
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animateToTab(tab);
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if (delegate != null) {
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delegate.didSelectTab(tab);
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}
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}
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private void animateToTab(int tab) {
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animateTabXTo = tab * tabWidth;
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startAnimationX = tabX;
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totalAnimationDiff = 0;
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startAnimationTime = System.currentTimeMillis();
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invalidate();
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}
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@Override
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protected void onLayout(boolean changed, int l, int t, int r, int b) {
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super.onLayout(changed, l, t, r, b);
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tabWidth = (r - l) / (float)tabCount;
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animateTabXTo = tabX = tabWidth * selectedTab;
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}
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@Override
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protected void onDraw(Canvas canvas) {
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if (tabX != animateTabXTo) {
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long dt = System.currentTimeMillis() - startAnimationTime;
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startAnimationTime = System.currentTimeMillis();
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totalAnimationDiff += dt;
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if (totalAnimationDiff > 200) {
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totalAnimationDiff = 200;
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tabX = animateTabXTo;
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} else {
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tabX = startAnimationX + interpolator.getInterpolation(totalAnimationDiff / 200.0f) * (animateTabXTo - startAnimationX);
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invalidate();
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}
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}
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canvas.drawRect(tabX, getHeight() - AndroidUtilities.dp(2), (tabX + tabWidth), getHeight(), paint);
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}
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}
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