1/*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.inputmethod.keyboard.internal;
18
19import android.content.Context;
20import android.graphics.Canvas;
21import android.graphics.Paint;
22import android.graphics.PorterDuff;
23import android.graphics.PorterDuffXfermode;
24import android.util.AttributeSet;
25import android.widget.RelativeLayout;
26
27import com.android.inputmethod.latin.common.CoordinateUtils;
28
29import java.util.ArrayList;
30
31public final class DrawingPreviewPlacerView extends RelativeLayout {
32    private final int[] mKeyboardViewOrigin = CoordinateUtils.newInstance();
33
34    private final ArrayList<AbstractDrawingPreview> mPreviews = new ArrayList<>();
35
36    public DrawingPreviewPlacerView(final Context context, final AttributeSet attrs) {
37        super(context, attrs);
38        setWillNotDraw(false);
39    }
40
41    public void setHardwareAcceleratedDrawingEnabled(final boolean enabled) {
42        if (!enabled) return;
43        final Paint layerPaint = new Paint();
44        layerPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_OVER));
45        setLayerType(LAYER_TYPE_HARDWARE, layerPaint);
46    }
47
48    public void addPreview(final AbstractDrawingPreview preview) {
49        if (mPreviews.indexOf(preview) < 0) {
50            mPreviews.add(preview);
51        }
52    }
53
54    public void setKeyboardViewGeometry(final int[] originCoords, final int width,
55            final int height) {
56        CoordinateUtils.copy(mKeyboardViewOrigin, originCoords);
57        final int count = mPreviews.size();
58        for (int i = 0; i < count; i++) {
59            mPreviews.get(i).setKeyboardViewGeometry(originCoords, width, height);
60        }
61    }
62
63    public void deallocateMemory() {
64        final int count = mPreviews.size();
65        for (int i = 0; i < count; i++) {
66            mPreviews.get(i).onDeallocateMemory();
67        }
68    }
69
70    @Override
71    protected void onDetachedFromWindow() {
72        super.onDetachedFromWindow();
73        deallocateMemory();
74    }
75
76    @Override
77    public void onDraw(final Canvas canvas) {
78        super.onDraw(canvas);
79        final int originX = CoordinateUtils.x(mKeyboardViewOrigin);
80        final int originY = CoordinateUtils.y(mKeyboardViewOrigin);
81        canvas.translate(originX, originY);
82        final int count = mPreviews.size();
83        for (int i = 0; i < count; i++) {
84            mPreviews.get(i).drawPreview(canvas);
85        }
86        canvas.translate(-originX, -originY);
87    }
88}
89