PieChart.java

/*
 * Copyright 2013 AndroidPlot.com
 *
 *    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 com.androidplot.pie;

import android.content.Context;
import android.content.res.TypedArray;
import android.util.AttributeSet;
import com.androidplot.Plot;
import com.androidplot.ui.AnchorPosition;
import com.androidplot.ui.SizeLayoutType;
import com.androidplot.ui.SizeMetrics;
import com.androidplot.util.PixelUtils;
import com.androidplot.ui.XLayoutStyle;
import com.androidplot.ui.YLayoutStyle;

public class PieChart extends Plot<Segment, SegmentFormatter, PieRenderer> {

    private static final int DEFAULT_PIE_WIDGET_H_DP = 18;
    private static final int DEFAULT_PIE_WIDGET_W_DP = 10;

    private static final int DEFAULT_PIE_WIDGET_Y_OFFSET_DP = 0;
    private static final int DEFAULT_PIE_WIDGET_X_OFFSET_DP = 0;

    public void setPieWidget(PieWidget pieWidget) {
        this.pieWidget = pieWidget;
    }

    @SuppressWarnings("FieldCanBeLocal")
    private PieWidget pieWidget;

    public PieChart(Context context, String title) {
        super(context, title);
    }

    public PieChart(Context context, String title, RenderMode mode) {
        super(context, title, mode);
    }

    public PieChart(Context context, AttributeSet attributes) {
        super(context, attributes);
    }

    @Override
    protected void onPreInit() {
        pieWidget = new PieWidget(
                getLayoutManager(),
                this,
                new SizeMetrics(
                        PixelUtils.dpToPix(DEFAULT_PIE_WIDGET_H_DP),
                        SizeLayoutType.FILL,
                        PixelUtils.dpToPix(DEFAULT_PIE_WIDGET_W_DP),
                        SizeLayoutType.FILL));

        pieWidget.position(
                PixelUtils.dpToPix(DEFAULT_PIE_WIDGET_X_OFFSET_DP),
                XLayoutStyle.ABSOLUTE_FROM_CENTER,
                PixelUtils.dpToPix(DEFAULT_PIE_WIDGET_Y_OFFSET_DP),
                YLayoutStyle.ABSOLUTE_FROM_CENTER,
                AnchorPosition.CENTER);

        pieWidget.setPadding(10, 10, 10, 10);

        // TODO: can't remember why this getClass() check is neccessary.  test if it actually is...
        /*if (getClass().equals(PieChart.class) && attrs != null) {
            loadAttrs(context, attrs);
        }*/
    }

    @Override
    protected void processAttrs(TypedArray attrs) {
        // TODO
    }

    public PieWidget getPieWidget() {
        return pieWidget;
    }

    public void addSegment(Segment segment, SegmentFormatter formatter) {
        addSeries(segment, formatter);
    }

    public void removeSegment(Segment segment) {
        removeSeries(segment);
    }
}