pl.openrnd.multilevellistview.sample.views.LevelBeamView.java Source code

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Here is the source code for pl.openrnd.multilevellistview.sample.views.LevelBeamView.java

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/******************************************************************************
 *
 *  2016 (C) Copyright Open-RnD Sp. z o.o.
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 ******************************************************************************/

package pl.openrnd.multilevellistview.sample.views;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.support.v4.content.ContextCompat;
import android.util.AttributeSet;
import android.view.View;

import pl.openrnd.multilevellistview.sample.R;

public class LevelBeamView extends View {

    private int mLevel;

    private int mPadding;
    private int mLinesWidth;
    private int mLinesOffset;
    private Paint mLinePaint;

    public LevelBeamView(Context context) {
        super(context);
        init();
    }

    public LevelBeamView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public LevelBeamView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init();
    }

    public void setLevel(int level) {
        mLevel = level;
        requestLayout();
    }

    private void init() {
        mPadding = (int) getResources().getDimension(R.dimen.data_item_row_padding);

        mLinesWidth = (int) getResources().getDimension(R.dimen.level_beam_line_width);
        mLinesOffset = (int) getResources().getDimension(R.dimen.level_beam_line_offset);

        mLinePaint = new Paint();
        mLinePaint.setAntiAlias(true);
        mLinePaint.setColor(Color.RED);
        mLinePaint.setStyle(Paint.Style.FILL);
        mLinePaint.setStrokeWidth(mLinesWidth);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int width = mPadding + (mLevel + 1) * (mLinesWidth + mLinesOffset);
        int height = MeasureSpec.getSize(heightMeasureSpec);
        setMeasuredDimension(width, height);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        for (int lvl = 0; lvl <= mLevel; lvl++) {
            float LINE_X = mPadding + lvl * mLinesWidth;
            if (lvl >= 1) {
                LINE_X += lvl * mLinesOffset;
            }
            mLinePaint.setColor(getColor(getColorResIdForLevel(lvl)));
            canvas.drawLine(LINE_X, 0, LINE_X, canvas.getHeight(), mLinePaint);
        }
    }

    private int getColor(int colorResId) {
        return ContextCompat.getColor(getContext(), colorResId);
    }

    private int getColorResIdForLevel(int level) {
        switch (level) {
        case 0:
            return R.color.level_0;
        case 1:
            return R.color.level_1;
        case 2:
            return R.color.level_2;
        case 3:
            return R.color.level_3;
        case 4:
            return R.color.level_4;
        case 5:
            return R.color.level_5;
        default:
            return R.color.level_default;
        }
    }

}