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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.graphics.Canvas;
     21 import android.graphics.Paint;
     22 import android.graphics.Path;
     23 import android.util.AttributeSet;
     24 import android.view.View;
     25 
     26 import com.android.inputmethod.compat.ViewCompatUtils;
     27 import com.android.inputmethod.latin.R;
     28 
     29 public final class SetupStepIndicatorView extends View {
     30     private final Path mIndicatorPath = new Path();
     31     private final Paint mIndicatorPaint = new Paint();
     32     private float mXRatio;
     33 
     34     public SetupStepIndicatorView(final Context context, final AttributeSet attrs) {
     35         super(context, attrs);
     36         mIndicatorPaint.setColor(getResources().getColor(R.color.setup_step_background));
     37         mIndicatorPaint.setStyle(Paint.Style.FILL);
     38     }
     39 
     40     public void setIndicatorPosition(final int stepPos, final int totalStepNum) {
     41         final int layoutDirection = ViewCompatUtils.getLayoutDirection(this);
     42         // The indicator position is the center of the partition that is equally divided into
     43         // the total step number.
     44         final float partionWidth = 1.0f / totalStepNum;
     45         final float pos = stepPos * partionWidth + partionWidth / 2.0f;
     46         mXRatio = (layoutDirection == ViewCompatUtils.LAYOUT_DIRECTION_RTL) ? 1.0f - pos : pos;
     47         invalidate();
     48     }
     49 
     50     @Override
     51     protected void onDraw(final Canvas canvas) {
     52         super.onDraw(canvas);
     53         final int xPos = (int)(getWidth() * mXRatio);
     54         final int height = getHeight();
     55         mIndicatorPath.rewind();
     56         mIndicatorPath.moveTo(xPos, 0);
     57         mIndicatorPath.lineTo(xPos + height, height);
     58         mIndicatorPath.lineTo(xPos - height, height);
     59         mIndicatorPath.close();
     60         canvas.drawPath(mIndicatorPath, mIndicatorPaint);
     61     }
     62 }
     63