mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
101 lines
3.3 KiB
Java
101 lines
3.3 KiB
Java
/* -*- Mode: Java; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: nil; -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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package org.mozilla.gecko.home;
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import org.mozilla.gecko.R;
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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.drawable.Drawable;
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import android.util.AttributeSet;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.view.ViewTreeObserver;
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import android.view.accessibility.AccessibilityEvent;
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import android.widget.HorizontalScrollView;
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import android.widget.LinearLayout;
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import android.widget.TextView;
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/**
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* {@code TabMenuStrip} is the view used to display {@code HomePager} tabs
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* on tablets. See {@code TabMenuStripLayout} for details about how the
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* tabs are created and updated.
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*/
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public class TabMenuStrip extends HorizontalScrollView
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implements HomePager.Decor {
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// Offset between the selected tab title and the edge of the screen,
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// except for the first and last tab in the tab strip.
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private static final int TITLE_OFFSET_DIPS = 24;
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private final int titleOffset;
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private final TabMenuStripLayout layout;
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public TabMenuStrip(Context context, AttributeSet attrs) {
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super(context, attrs);
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// Disable the scroll bar.
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setHorizontalScrollBarEnabled(false);
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titleOffset = (int) (TITLE_OFFSET_DIPS * getResources().getDisplayMetrics().density);
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layout = new TabMenuStripLayout(context, attrs);
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addView(layout, LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
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}
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@Override
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public void onAddPagerView(String title) {
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layout.onAddPagerView(title);
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}
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@Override
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public void removeAllPagerViews() {
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layout.removeAllViews();
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}
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@Override
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public void onPageSelected(final int position) {
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layout.onPageSelected(position);
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}
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@Override
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public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
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layout.onPageScrolled(position, positionOffset, positionOffsetPixels);
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final View selectedTitle = layout.getChildAt(position);
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if (selectedTitle == null) {
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return;
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}
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final int selectedTitleOffset = (int) (positionOffset * selectedTitle.getWidth());
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int titleLeft = selectedTitle.getLeft() + selectedTitleOffset;
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if (position > 0) {
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titleLeft -= titleOffset;
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}
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int titleRight = selectedTitle.getRight() + selectedTitleOffset;
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if (position < layout.getChildCount() - 1) {
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titleRight += titleOffset;
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}
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final int scrollX = getScrollX();
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if (titleLeft < scrollX) {
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// Tab strip overflows to the left.
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scrollTo(titleLeft, 0);
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} else if (titleRight > scrollX + getWidth()) {
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// Tab strip overflows to the right.
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scrollTo(titleRight - getWidth(), 0);
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}
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}
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@Override
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public void setOnTitleClickListener(HomePager.OnTitleClickListener onTitleClickListener) {
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layout.setOnTitleClickListener(onTitleClickListener);
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}
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}
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