1/*
2 * Copyright (C) 2010 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.camera.ui;
18
19import android.content.Context;
20import android.graphics.Matrix;
21import android.graphics.Rect;
22import android.view.animation.AlphaAnimation;
23import android.view.animation.Transformation;
24
25import javax.microedition.khronos.opengles.GL11;
26
27abstract class AbstractIndicator extends GLView {
28    private static final int DEFAULT_PADDING = 3;
29    private int mOrientation = 0;
30
31    abstract protected BitmapTexture getIcon();
32
33    public AbstractIndicator(Context context) {
34        int padding = GLRootView.dpToPixel(context, DEFAULT_PADDING);
35        setPaddings(padding, 0, padding, 0);
36    }
37
38    @Override
39    protected void onMeasure(int widthSpec, int heightSpec) {
40        BitmapTexture icon = getIcon();
41        new MeasureHelper(this)
42               .setPreferredContentSize(icon.getWidth(), icon.getHeight())
43               .measure(widthSpec, heightSpec);
44    }
45
46    @Override
47    protected void render(GLRootView root, GL11 gl) {
48        BitmapTexture icon = getIcon();
49        if (icon != null) {
50            Rect p = mPaddings;
51            int width = getWidth() - p.left - p.right;
52            int height = getHeight() - p.top - p.bottom;
53            if (mOrientation != 0) {
54                Transformation trans = root.pushTransform();
55                Matrix matrix = trans.getMatrix();
56                matrix.preTranslate(p.left + width / 2, p.top + height / 2);
57                matrix.preRotate(-mOrientation);
58                icon.draw(root, -icon.getWidth() / 2, -icon.getHeight() / 2);
59                root.popTransform();
60            } else {
61                icon.draw(root,
62                        p.left + (width - icon.getWidth()) / 2,
63                        p.top + (height - icon.getHeight()) / 2);
64            }
65        }
66    }
67
68    public void setOrientation(int orientation) {
69        if (orientation % 90 != 0) throw new IllegalArgumentException();
70        orientation = orientation % 360;
71        if (orientation < 0) orientation += 360;
72
73        if (mOrientation == orientation) return;
74        mOrientation = orientation;
75
76        if (getGLRootView() != null) {
77            AlphaAnimation anim = new AlphaAnimation(0.2f, 1);
78            anim.setDuration(200);
79            startAnimation(anim);
80        }
81    }
82
83    abstract public GLView getPopupContent();
84
85    abstract public void overrideSettings(String key, String settings);
86
87    abstract public void reloadPreferences();
88}
89