mirror of
https://github.com/material-components/material-components-android.git
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1967141098
To support different font weights and other text attributes for active and inactive TextViews, the bottom nav now takes two separate text appearances, one for the active TextView, and one for the inactive TextView. This creates more complexity for how the ColorStateList for textColor is handled, and there were a couple of alternatives considered, but this seems to be the most elegant solution to a unique set of requirements. The text size attributes introduced in the last commit are deleted. They were only necessary as an interim solution for text sizes, to keep the active and inactive labels from jumping to the wrong sizes. PiperOrigin-RevId: 182054036
318 lines
10 KiB
Java
318 lines
10 KiB
Java
/*
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* Copyright (C) 2016 The Android Open Source Project
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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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package android.support.design.internal;
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import static android.support.annotation.RestrictTo.Scope.LIBRARY_GROUP;
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import android.content.Context;
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import android.content.res.ColorStateList;
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import android.content.res.Resources;
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import android.graphics.drawable.Drawable;
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import android.support.annotation.NonNull;
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import android.support.annotation.Nullable;
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import android.support.annotation.RestrictTo;
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import android.support.annotation.StyleRes;
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import android.support.design.bottomnavigation.LabelVisibilityMode;
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import android.support.v4.content.ContextCompat;
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import android.support.v4.graphics.drawable.DrawableCompat;
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import android.support.v4.view.PointerIconCompat;
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import android.support.v4.view.ViewCompat;
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import android.support.v4.widget.TextViewCompat;
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import android.support.v7.view.menu.MenuItemImpl;
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import android.support.v7.view.menu.MenuView;
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import android.support.v7.widget.TooltipCompat;
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import android.util.AttributeSet;
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import android.view.Gravity;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.widget.FrameLayout;
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import android.widget.ImageView;
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import android.widget.TextView;
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/** @hide */
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@RestrictTo(LIBRARY_GROUP)
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public class BottomNavigationItemView extends FrameLayout implements MenuView.ItemView {
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public static final int INVALID_ITEM_POSITION = -1;
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private static final int[] CHECKED_STATE_SET = {android.R.attr.state_checked};
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private final int defaultMargin;
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private float shiftAmount;
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private float scaleUpFactor;
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private float scaleDownFactor;
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private boolean shiftingMode;
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private int labelVisibilityMode;
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private ImageView icon;
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private final TextView smallLabel;
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private final TextView largeLabel;
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private int itemPosition = INVALID_ITEM_POSITION;
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private MenuItemImpl itemData;
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private ColorStateList iconTint;
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public BottomNavigationItemView(@NonNull Context context) {
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this(context, null);
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}
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public BottomNavigationItemView(@NonNull Context context, AttributeSet attrs) {
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this(context, attrs, 0);
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}
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public BottomNavigationItemView(Context context, AttributeSet attrs, int defStyleAttr) {
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super(context, attrs, defStyleAttr);
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final Resources res = getResources();
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LayoutInflater.from(context).inflate(R.layout.design_bottom_navigation_item, this, true);
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setBackgroundResource(R.drawable.design_bottom_navigation_item_background);
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defaultMargin = res.getDimensionPixelSize(R.dimen.design_bottom_navigation_margin);
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icon = findViewById(R.id.icon);
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smallLabel = findViewById(R.id.smallLabel);
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largeLabel = findViewById(R.id.largeLabel);
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calculateTextScaleFactors(smallLabel.getTextSize(), largeLabel.getTextSize());
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}
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@Override
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public void initialize(MenuItemImpl itemData, int menuType) {
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this.itemData = itemData;
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setCheckable(itemData.isCheckable());
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setChecked(itemData.isChecked());
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setEnabled(itemData.isEnabled());
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setIcon(itemData.getIcon());
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setTitle(itemData.getTitle());
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setId(itemData.getItemId());
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setContentDescription(itemData.getContentDescription());
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TooltipCompat.setTooltipText(this, itemData.getTooltipText());
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setVisibility(itemData.isVisible() ? View.VISIBLE : View.GONE);
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}
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public void setItemPosition(int position) {
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itemPosition = position;
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}
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public int getItemPosition() {
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return itemPosition;
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}
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public void setShiftingMode(boolean enabled) {
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if (shiftingMode != enabled) {
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shiftingMode = enabled;
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boolean initialized = itemData != null;
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if (initialized) {
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setChecked(itemData.isChecked());
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}
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}
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}
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public void setLabelVisibilityMode(@LabelVisibilityMode int mode) {
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if (labelVisibilityMode != mode) {
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labelVisibilityMode = mode;
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boolean initialized = itemData != null;
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if (initialized) {
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setChecked(itemData.isChecked());
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}
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}
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}
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@Override
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public MenuItemImpl getItemData() {
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return itemData;
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}
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@Override
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public void setTitle(CharSequence title) {
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smallLabel.setText(title);
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largeLabel.setText(title);
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}
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@Override
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public void setCheckable(boolean checkable) {
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refreshDrawableState();
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}
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@Override
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public void setChecked(boolean checked) {
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largeLabel.setPivotX(largeLabel.getWidth() / 2);
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largeLabel.setPivotY(largeLabel.getBaseline());
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smallLabel.setPivotX(smallLabel.getWidth() / 2);
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smallLabel.setPivotY(smallLabel.getBaseline());
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switch (labelVisibilityMode) {
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case LabelVisibilityMode.LABEL_VISIBILITY_LEGACY:
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if (shiftingMode) {
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if (checked) {
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setViewLayoutParams(icon, defaultMargin, Gravity.CENTER_HORIZONTAL | Gravity.TOP);
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setViewValues(largeLabel, 1f, 1f, VISIBLE);
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} else {
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setViewLayoutParams(icon, defaultMargin, Gravity.CENTER);
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setViewValues(largeLabel, 0.5f, 0.5f, INVISIBLE);
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}
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smallLabel.setVisibility(INVISIBLE);
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} else {
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if (checked) {
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setViewLayoutParams(
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icon, (int) (defaultMargin + shiftAmount), Gravity.CENTER_HORIZONTAL | Gravity.TOP);
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setViewValues(largeLabel, 1f, 1f, VISIBLE);
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setViewValues(smallLabel, scaleUpFactor, scaleUpFactor, INVISIBLE);
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} else {
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setViewLayoutParams(icon, defaultMargin, Gravity.CENTER_HORIZONTAL | Gravity.TOP);
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setViewValues(largeLabel, scaleDownFactor, scaleDownFactor, INVISIBLE);
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setViewValues(smallLabel, 1f, 1f, VISIBLE);
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}
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}
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break;
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case LabelVisibilityMode.LABEL_VISIBILITY_SELECTED:
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if (checked) {
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setViewLayoutParams(icon, defaultMargin, Gravity.CENTER_HORIZONTAL | Gravity.TOP);
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setViewValues(largeLabel, 1f, 1f, VISIBLE);
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} else {
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setViewLayoutParams(icon, defaultMargin, Gravity.CENTER);
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setViewValues(largeLabel, 0.5f, 0.5f, INVISIBLE);
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}
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smallLabel.setVisibility(INVISIBLE);
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break;
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case LabelVisibilityMode.LABEL_VISIBILITY_LABELED:
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if (checked) {
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setViewLayoutParams(
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icon, (int) (defaultMargin + shiftAmount), Gravity.CENTER_HORIZONTAL | Gravity.TOP);
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setViewValues(largeLabel, 1f, 1f, VISIBLE);
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setViewValues(smallLabel, scaleUpFactor, scaleUpFactor, INVISIBLE);
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} else {
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setViewLayoutParams(icon, defaultMargin, Gravity.CENTER_HORIZONTAL | Gravity.TOP);
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setViewValues(largeLabel, scaleDownFactor, scaleDownFactor, INVISIBLE);
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setViewValues(smallLabel, 1f, 1f, VISIBLE);
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}
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break;
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case LabelVisibilityMode.LABEL_VISIBILITY_UNLABELED:
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setViewLayoutParams(icon, defaultMargin, Gravity.CENTER);
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largeLabel.setVisibility(GONE);
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smallLabel.setVisibility(GONE);
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break;
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default:
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break;
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}
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refreshDrawableState();
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}
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private void setViewLayoutParams(@NonNull View view, int topMargin, int gravity) {
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LayoutParams viewParams = (LayoutParams) view.getLayoutParams();
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viewParams.topMargin = topMargin;
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viewParams.gravity = gravity;
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view.setLayoutParams(viewParams);
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}
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private void setViewValues(@NonNull View view, float scaleX, float scaleY, int visibility) {
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view.setScaleX(scaleX);
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view.setScaleY(scaleY);
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view.setVisibility(visibility);
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}
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@Override
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public void setEnabled(boolean enabled) {
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super.setEnabled(enabled);
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smallLabel.setEnabled(enabled);
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largeLabel.setEnabled(enabled);
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icon.setEnabled(enabled);
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if (enabled) {
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ViewCompat.setPointerIcon(
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this, PointerIconCompat.getSystemIcon(getContext(), PointerIconCompat.TYPE_HAND));
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} else {
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ViewCompat.setPointerIcon(this, null);
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}
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}
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@Override
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public int[] onCreateDrawableState(final int extraSpace) {
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final int[] drawableState = super.onCreateDrawableState(extraSpace + 1);
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if (itemData != null && itemData.isCheckable() && itemData.isChecked()) {
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mergeDrawableStates(drawableState, CHECKED_STATE_SET);
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}
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return drawableState;
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}
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@Override
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public void setShortcut(boolean showShortcut, char shortcutKey) {}
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@Override
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public void setIcon(Drawable icon) {
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if (icon != null) {
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Drawable.ConstantState state = icon.getConstantState();
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icon = DrawableCompat.wrap(state == null ? icon : state.newDrawable()).mutate();
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DrawableCompat.setTintList(icon, iconTint);
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}
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this.icon.setImageDrawable(icon);
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}
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@Override
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public boolean prefersCondensedTitle() {
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return false;
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}
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@Override
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public boolean showsIcon() {
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return true;
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}
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public void setIconTintList(ColorStateList tint) {
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iconTint = tint;
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if (itemData != null) {
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// Update the icon so that the tint takes effect
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setIcon(itemData.getIcon());
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}
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}
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public void setTextAppearanceInactive(@StyleRes int inactiveTextAppearance) {
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TextViewCompat.setTextAppearance(smallLabel, inactiveTextAppearance);
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calculateTextScaleFactors(smallLabel.getTextSize(), largeLabel.getTextSize());
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}
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public void setTextAppearanceActive(@StyleRes int activeTextAppearance) {
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TextViewCompat.setTextAppearance(largeLabel, activeTextAppearance);
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calculateTextScaleFactors(smallLabel.getTextSize(), largeLabel.getTextSize());
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}
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public void setTextColor(@Nullable ColorStateList color) {
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if (color != null) {
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smallLabel.setTextColor(color);
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largeLabel.setTextColor(color);
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}
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}
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private void calculateTextScaleFactors(float smallLabelSize, float largeLabelSize) {
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shiftAmount = smallLabelSize - largeLabelSize;
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scaleUpFactor = 1f * largeLabelSize / smallLabelSize;
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scaleDownFactor = 1f * smallLabelSize / largeLabelSize;
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}
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public void setItemBackground(int background) {
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Drawable backgroundDrawable =
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background == 0 ? null : ContextCompat.getDrawable(getContext(), background);
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ViewCompat.setBackground(this, backgroundDrawable);
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}
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}
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