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/*
* Copyright (C) 2016 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.launcher3.shortcuts;
import android.content.Context;
import android.support.annotation.IntDef;
import android.util.AttributeSet;
import com.android.launcher3.BubbleTextView;
import com.android.launcher3.R;
/**
* A {@link BubbleTextView} that represents a deep shortcut within an app.
*/
public class DeepShortcutView extends BubbleTextView {
private static final float HOVER_SCALE = 1.1f;
// The direction this view should translate when animating the hover state.
// This allows hovered shortcuts to "push" other shortcuts away.
@IntDef({DIRECTION_UP, DIRECTION_NONE, DIRECTION_DOWN})
public @interface TranslationDirection {}
public static final int DIRECTION_UP = -1;
public static final int DIRECTION_NONE = 0;
public static final int DIRECTION_DOWN = 1;
@TranslationDirection
private int mTranslationDirection = DIRECTION_NONE;
private int mSpacing;
private int mTop;
private boolean mIsHoveringOver = false;
public DeepShortcutView(Context context) {
this(context, null, 0);
}
public DeepShortcutView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public DeepShortcutView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
mSpacing = getResources().getDimensionPixelSize(R.dimen.deep_shortcuts_spacing);
}
public int getSpacing() {
return mSpacing;
}
/**
* Updates the state of this view based on touches over the container before user lifts finger.
*
* @param containerContainsTouch whether the {@link DeepShortcutsContainer} this shortcut
* is inside contains the current touch
* @param isBelowHoveredShortcut whether a sibling shortcut before this one in the
* view hierarchy is being hovered over
* @param touchY the y coordinate of the touch, relative to the {@link DeepShortcutsContainer}
* this shortcut is inside
* @return whether this shortcut is being hovered over
*/
public boolean updateHoverState(boolean containerContainsTouch, boolean isBelowHoveredShortcut,
float touchY) {
if (!containerContainsTouch) {
mIsHoveringOver = false;
mTranslationDirection = DIRECTION_NONE;
} else if (isBelowHoveredShortcut) {
mIsHoveringOver = false;
mTranslationDirection = DIRECTION_DOWN;
} else {
// Include space around the view when determining hover state to avoid gaps.
mTop = (int) (getY() - getTranslationY());
mIsHoveringOver = (touchY >= mTop - mSpacing / 2)
&& (touchY < mTop + getHeight() + mSpacing / 2);
mTranslationDirection = mIsHoveringOver ? DIRECTION_NONE : DIRECTION_UP;
}
animateHoverState();
return mIsHoveringOver;
}
/**
* If this shortcut is being hovered over, we scale it up. If another shortcut is being hovered
* over, we translate this one away from it to account for its increased size.
*
* TODO: apply motion spec here
*/
private void animateHoverState() {
float scale = mIsHoveringOver ? HOVER_SCALE : 1f;
setScaleX(scale);
setScaleY(scale);
float translation = (HOVER_SCALE - 1f) * getHeight();
setTranslationY(translation * mTranslationDirection);
}
public boolean isHoveringOver() {
return mIsHoveringOver;
}
}
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