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      1 /*
      2  * Copyright (C) 2013 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 
     17 package com.android.inputmethod.latin.setup;
     18 
     19 import android.content.Context;
     20 import android.content.res.ColorStateList;
     21 import android.graphics.Canvas;
     22 import android.graphics.Paint;
     23 import android.graphics.Path;
     24 import android.support.v4.view.ViewCompat;
     25 import android.util.AttributeSet;
     26 import android.view.LayoutInflater;
     27 import android.view.View;
     28 import android.widget.LinearLayout;
     29 import android.widget.TextView;
     30 
     31 import com.android.inputmethod.latin.R;
     32 
     33 public final class SetupStartIndicatorView extends LinearLayout {
     34     public SetupStartIndicatorView(final Context context, final AttributeSet attrs) {
     35         super(context, attrs);
     36         setOrientation(HORIZONTAL);
     37         LayoutInflater.from(context).inflate(R.layout.setup_start_indicator_label, this);
     38 
     39         final LabelView labelView = (LabelView)findViewById(R.id.setup_start_label);
     40         labelView.setIndicatorView(findViewById(R.id.setup_start_indicator));
     41     }
     42 
     43     public static final class LabelView extends TextView {
     44         private View mIndicatorView;
     45 
     46         public LabelView(final Context context, final AttributeSet attrs) {
     47             super(context, attrs);
     48         }
     49 
     50         public void setIndicatorView(final View indicatorView) {
     51             mIndicatorView = indicatorView;
     52         }
     53 
     54         // TODO: Once we stop supporting ICS, uncomment {@link #setPressed(boolean)} method and
     55         // remove this method.
     56         @Override
     57         protected void drawableStateChanged() {
     58             super.drawableStateChanged();
     59             for (final int state : getDrawableState()) {
     60                 if (state == android.R.attr.state_pressed) {
     61                     updateIndicatorView(true /* pressed */);
     62                     return;
     63                 }
     64             }
     65             updateIndicatorView(false /* pressed */);
     66         }
     67 
     68         // TODO: Once we stop supporting ICS, uncomment this method and remove
     69         // {@link #drawableStateChanged()} method.
     70 //        @Override
     71 //        public void setPressed(final boolean pressed) {
     72 //            super.setPressed(pressed);
     73 //            updateIndicatorView(pressed);
     74 //        }
     75 
     76         private void updateIndicatorView(final boolean pressed) {
     77             if (mIndicatorView != null) {
     78                 mIndicatorView.setPressed(pressed);
     79                 mIndicatorView.invalidate();
     80             }
     81         }
     82     }
     83 
     84     public static final class IndicatorView extends View {
     85         private final Path mIndicatorPath = new Path();
     86         private final Paint mIndicatorPaint = new Paint();
     87         private final ColorStateList mIndicatorColor;
     88 
     89         public IndicatorView(final Context context, final AttributeSet attrs) {
     90             super(context, attrs);
     91             mIndicatorColor = getResources().getColorStateList(
     92                     R.color.setup_step_action_background);
     93             mIndicatorPaint.setStyle(Paint.Style.FILL);
     94         }
     95 
     96         @Override
     97         protected void onDraw(final Canvas canvas) {
     98             super.onDraw(canvas);
     99             final int layoutDirection = ViewCompat.getLayoutDirection(this);
    100             final int width = getWidth();
    101             final int height = getHeight();
    102             final float halfHeight = height / 2.0f;
    103             final Path path = mIndicatorPath;
    104             path.rewind();
    105             if (layoutDirection == ViewCompat.LAYOUT_DIRECTION_RTL) {
    106                 // Left arrow
    107                 path.moveTo(width, 0.0f);
    108                 path.lineTo(0.0f, halfHeight);
    109                 path.lineTo(width, height);
    110             } else { // LAYOUT_DIRECTION_LTR
    111                 // Right arrow
    112                 path.moveTo(0.0f, 0.0f);
    113                 path.lineTo(width, halfHeight);
    114                 path.lineTo(0.0f, height);
    115             }
    116             path.close();
    117             final int[] stateSet = getDrawableState();
    118             final int color = mIndicatorColor.getColorForState(stateSet, 0);
    119             mIndicatorPaint.setColor(color);
    120             canvas.drawPath(path, mIndicatorPaint);
    121         }
    122     }
    123 }
    124