1/*
2 * Copyright (C) 2014 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 */
16package android.support.v7.widget;
17
18import android.content.Context;
19import android.graphics.Canvas;
20import android.graphics.Paint;
21import android.graphics.Rect;
22import android.graphics.RectF;
23import android.view.View;
24
25class CardViewEclairMr1 implements CardViewImpl {
26
27    final RectF sCornerRect = new RectF();
28
29    @Override
30    public void initStatic() {
31        // Draws a round rect using 7 draw operations. This is faster than using
32        // canvas.drawRoundRect before JBMR1 because API 11-16 used alpha mask textures to draw
33        // shapes.
34        RoundRectDrawableWithShadow.sRoundRectHelper
35                = new RoundRectDrawableWithShadow.RoundRectHelper() {
36            @Override
37            public void drawRoundRect(Canvas canvas, RectF bounds, float cornerRadius,
38                    Paint paint) {
39                final float twoRadius = cornerRadius * 2;
40                final float innerWidth = bounds.width() - twoRadius - 1;
41                final float innerHeight = bounds.height() - twoRadius - 1;
42                // increment it to account for half pixels.
43                if (cornerRadius >= 1f) {
44                    cornerRadius += .5f;
45                    sCornerRect.set(-cornerRadius, -cornerRadius, cornerRadius, cornerRadius);
46                    int saved = canvas.save();
47                    canvas.translate(bounds.left + cornerRadius, bounds.top + cornerRadius);
48                    canvas.drawArc(sCornerRect, 180, 90, true, paint);
49                    canvas.translate(innerWidth, 0);
50                    canvas.rotate(90);
51                    canvas.drawArc(sCornerRect, 180, 90, true, paint);
52                    canvas.translate(innerHeight, 0);
53                    canvas.rotate(90);
54                    canvas.drawArc(sCornerRect, 180, 90, true, paint);
55                    canvas.translate(innerWidth, 0);
56                    canvas.rotate(90);
57                    canvas.drawArc(sCornerRect, 180, 90, true, paint);
58                    canvas.restoreToCount(saved);
59                    //draw top and bottom pieces
60                    canvas.drawRect(bounds.left + cornerRadius - 1f, bounds.top,
61                            bounds.right - cornerRadius + 1f, bounds.top + cornerRadius,
62                            paint);
63                    canvas.drawRect(bounds.left + cornerRadius - 1f,
64                            bounds.bottom - cornerRadius + 1f, bounds.right - cornerRadius + 1f,
65                            bounds.bottom, paint);
66                }
67////                center
68                canvas.drawRect(bounds.left, bounds.top + Math.max(0, cornerRadius - 1f),
69                        bounds.right, bounds.bottom - cornerRadius + 1f, paint);
70            }
71        };
72    }
73
74    @Override
75    public void initialize(CardViewDelegate cardView, Context context, int backgroundColor,
76            float radius, float elevation, float maxElevation) {
77        RoundRectDrawableWithShadow background = createBackground(context, backgroundColor, radius,
78                elevation, maxElevation);
79        background.setAddPaddingForCorners(cardView.getPreventCornerOverlap());
80        cardView.setBackgroundDrawable(background);
81        updatePadding(cardView);
82    }
83
84    RoundRectDrawableWithShadow createBackground(Context context, int backgroundColor,
85            float radius, float elevation, float maxElevation) {
86        return new RoundRectDrawableWithShadow(context.getResources(), backgroundColor, radius,
87                elevation, maxElevation);
88    }
89
90    @Override
91    public void updatePadding(CardViewDelegate cardView) {
92        Rect shadowPadding = new Rect();
93        getShadowBackground(cardView).getMaxShadowAndCornerPadding(shadowPadding);
94        ((View) cardView).setMinimumHeight((int) Math.ceil(getMinHeight(cardView)));
95        ((View) cardView).setMinimumWidth((int) Math.ceil(getMinWidth(cardView)));
96        cardView.setShadowPadding(shadowPadding.left, shadowPadding.top,
97                shadowPadding.right, shadowPadding.bottom);
98    }
99
100    @Override
101    public void onCompatPaddingChanged(CardViewDelegate cardView) {
102        // NO OP
103    }
104
105    @Override
106    public void onPreventCornerOverlapChanged(CardViewDelegate cardView) {
107        getShadowBackground(cardView).setAddPaddingForCorners(cardView.getPreventCornerOverlap());
108        updatePadding(cardView);
109    }
110
111    @Override
112    public void setBackgroundColor(CardViewDelegate cardView, int color) {
113        getShadowBackground(cardView).setColor(color);
114    }
115
116    @Override
117    public void setRadius(CardViewDelegate cardView, float radius) {
118        getShadowBackground(cardView).setCornerRadius(radius);
119        updatePadding(cardView);
120    }
121
122    @Override
123    public float getRadius(CardViewDelegate cardView) {
124        return getShadowBackground(cardView).getCornerRadius();
125    }
126
127    @Override
128    public void setElevation(CardViewDelegate cardView, float elevation) {
129        getShadowBackground(cardView).setShadowSize(elevation);
130    }
131
132    @Override
133    public float getElevation(CardViewDelegate cardView) {
134        return getShadowBackground(cardView).getShadowSize();
135    }
136
137    @Override
138    public void setMaxElevation(CardViewDelegate cardView, float maxElevation) {
139        getShadowBackground(cardView).setMaxShadowSize(maxElevation);
140        updatePadding(cardView);
141    }
142
143    @Override
144    public float getMaxElevation(CardViewDelegate cardView) {
145        return getShadowBackground(cardView).getMaxShadowSize();
146    }
147
148    @Override
149    public float getMinWidth(CardViewDelegate cardView) {
150        return getShadowBackground(cardView).getMinWidth();
151    }
152
153    @Override
154    public float getMinHeight(CardViewDelegate cardView) {
155        return getShadowBackground(cardView).getMinHeight();
156    }
157
158    private RoundRectDrawableWithShadow getShadowBackground(CardViewDelegate cardView) {
159        return ((RoundRectDrawableWithShadow) cardView.getBackground());
160    }
161}
162