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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.documentsui;
import static com.android.documentsui.util.FlagUtils.isUseMaterial3FlagEnabled;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Point;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.TextView;
import androidx.annotation.Nullable;
import com.android.documentsui.DragAndDropManager.State;
import java.text.NumberFormat;
class DragShadowBuilder extends View.DragShadowBuilder {
private final View mShadowView;
private final TextView mTitle;
private final DropBadgeView mIcon;
private final int mWidth;
private final int mHeight;
private final int mShadowRadius;
private final int mPadding;
private Paint paint;
// This will be null if use_material3 flag is OFF.
private final @Nullable View mAdditionalShadowView;
// This will always be 0 if the use_material3 flag is OFF.
private int mDragFileCount = 0;
// The following 5 dimensions will be 0 if the use_material3 flag is OFF.
private final int mDragContentRadius;
private final int mAdditionalLayerOffset;
private final int mDragFileCounterOffset;
private final int mShadow2Radius;
private final int mShadowYOffset;
DragShadowBuilder(Context context) {
mWidth = context.getResources().getDimensionPixelSize(R.dimen.drag_shadow_width);
mHeight = context.getResources().getDimensionPixelSize(R.dimen.drag_shadow_height);
mShadowRadius = context.getResources().getDimensionPixelSize(R.dimen.drag_shadow_radius);
mPadding = context.getResources().getDimensionPixelSize(R.dimen.drag_shadow_padding);
mShadowView = LayoutInflater.from(context).inflate(R.layout.drag_shadow_layout, null);
mTitle = (TextView) mShadowView.findViewById(android.R.id.title);
mIcon = (DropBadgeView) mShadowView.findViewById(android.R.id.icon);
if (isUseMaterial3FlagEnabled()) {
mAdditionalShadowView =
LayoutInflater.from(context).inflate(R.layout.additional_drag_shadow, null);
mDragContentRadius =
context.getResources().getDimensionPixelSize(R.dimen.drag_content_radius);
mAdditionalLayerOffset =
context.getResources()
.getDimensionPixelSize(R.dimen.drag_additional_layer_offset);
mDragFileCounterOffset =
context.getResources().getDimensionPixelSize(R.dimen.drag_file_counter_offset);
mShadow2Radius =
context.getResources().getDimensionPixelSize(R.dimen.drag_shadow_2_radius);
mShadowYOffset =
context.getResources().getDimensionPixelSize(R.dimen.drag_shadow_y_offset);
} else {
mAdditionalShadowView = null;
mDragContentRadius = 0;
mAdditionalLayerOffset = 0;
mDragFileCounterOffset = 0;
mShadow2Radius = 0;
mShadowYOffset = 0;
}
// Important for certain APIs
mShadowView.setLayerType(View.LAYER_TYPE_SOFTWARE, paint);
paint = new Paint(Paint.ANTI_ALIAS_FLAG);
}
@Override
public void onProvideShadowMetrics(
Point shadowSize, Point shadowTouchPoint) {
shadowSize.set(mWidth, mHeight);
shadowTouchPoint.set(mWidth, mHeight);
}
@Override
public void onDrawShadow(Canvas canvas) {
Rect r = canvas.getClipBounds();
// Calling measure is necessary in order for all child views to get correctly laid out.
mShadowView.measure(
View.MeasureSpec.makeMeasureSpec(r.right - r.left, View.MeasureSpec.EXACTLY),
View.MeasureSpec.makeMeasureSpec(r.bottom - r.top , View.MeasureSpec.EXACTLY));
mShadowView.layout(r.left, r.top, r.right, r.bottom);
// Since DragShadow is not an actual view drawn in hardware-accelerated window,
// android:elevation does not work; we need to draw the shadow ourselves manually.
paint.setColor(Color.TRANSPARENT);
// Layers on the canvas (from bottom to top):
// 1. Two shadows for the additional drag layer (if drag file count > 1)
// 2. The additional layer view itself (if drag file count > 1)
// 3. Two shadows for the drag content layer (icon, title)
// 4. The drag content layer itself
final int shadowOneOpacity = (int) (255 * 0.15);
final int shadowTwoOpacity = (int) (255 * 0.30);
if (mAdditionalShadowView != null && mDragFileCount > 1) {
mAdditionalShadowView.measure(
View.MeasureSpec.makeMeasureSpec(r.right - r.left, View.MeasureSpec.EXACTLY),
View.MeasureSpec.makeMeasureSpec(r.bottom - r.top , View.MeasureSpec.EXACTLY));
mAdditionalShadowView.layout(r.left, r.top, r.right, r.bottom);
// Shadow 1
paint.setShadowLayer(
mShadowRadius, 0, mShadowYOffset, Color.argb(shadowOneOpacity, 0, 0, 0));
canvas.drawRoundRect(
r.left + mShadowRadius,
r.top + mDragFileCounterOffset + mAdditionalLayerOffset,
r.right - mDragFileCounterOffset - mAdditionalLayerOffset,
r.bottom - mShadowRadius,
mDragContentRadius,
mDragContentRadius,
paint);
// Shadow 2
paint.setShadowLayer(
mShadow2Radius, 0, mShadowYOffset, Color.argb(shadowTwoOpacity, 0, 0, 0));
canvas.drawRoundRect(
r.left + mShadowRadius,
r.top + mDragFileCounterOffset + mAdditionalLayerOffset,
r.right - mDragFileCounterOffset - mAdditionalLayerOffset,
r.bottom - mShadowRadius,
mDragContentRadius,
mDragContentRadius,
paint);
mAdditionalShadowView.draw(canvas);
}
if (isUseMaterial3FlagEnabled()) {
// Shadow 1
paint.setShadowLayer(
mShadowRadius, 0, mShadowYOffset, Color.argb(shadowOneOpacity, 0, 0, 0));
canvas.drawRoundRect(
r.left + mShadowRadius + mAdditionalLayerOffset,
r.top + mDragFileCounterOffset,
r.right - mDragFileCounterOffset,
r.bottom - mShadowRadius - mAdditionalLayerOffset,
mDragContentRadius,
mDragContentRadius,
paint);
// Shadow 2
paint.setShadowLayer(
mShadow2Radius, 0, mShadowYOffset, Color.argb(shadowTwoOpacity, 0, 0, 0));
canvas.drawRoundRect(
r.left + mShadowRadius + mAdditionalLayerOffset,
r.top + mDragFileCounterOffset,
r.right - mDragFileCounterOffset,
r.bottom - mShadowRadius - mAdditionalLayerOffset,
mDragContentRadius,
mDragContentRadius,
paint);
} else {
// Shadow 1
int opacity = (int) (255 * 0.1);
paint.setShadowLayer(mShadowRadius, 0, 0, Color.argb(opacity, 0, 0, 0));
canvas.drawRect(r.left + mPadding, r.top + mPadding, r.right - mPadding,
r.bottom - mPadding, paint);
// Shadow 2
opacity = (int) (255 * 0.24);
paint.setShadowLayer(mShadowRadius, 0, mShadowRadius, Color.argb(opacity, 0, 0, 0));
canvas.drawRect(r.left + mPadding, r.top + mPadding, r.right - mPadding,
r.bottom - mPadding, paint);
}
mShadowView.draw(canvas);
}
void updateTitle(String title) {
mTitle.setText(title);
}
void updateIcon(Drawable icon) {
mIcon.updateIcon(icon);
}
void onStateUpdated(@State int state) {
mIcon.updateState(state);
}
void updateDragFileCount(int count) {
if (!isUseMaterial3FlagEnabled()) {
return;
}
mDragFileCount = count;
TextView dragFileCountView = mShadowView.findViewById(R.id.drag_file_counter);
if (dragFileCountView != null) {
dragFileCountView.setVisibility(count > 1 ? View.VISIBLE : View.GONE);
if (count > 1) {
NumberFormat numberFormat = NumberFormat.getInstance();
dragFileCountView.setText(numberFormat.format(count));
}
}
}
}
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