LineGraphView.java

/* 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 uk.ac.cam.cl.dtg.snowdon;

import android.content.Context;
import android.graphics.Canvas;
import android.util.AttributeSet;

/**
 * Inherits from GraphView and draws a graph with a simple line
 * between data points. Ascending and descending lines may have different
 * colours, if specified by XML, or by setAscendingColor() or setDescendingColor().
 */
public class LineGraphView extends GraphView {
    /**
     * Creates a new LineGraphView and sets layout parameters from XML via
     * GraphView.
     *
     * @param context
     * @param attributes
     */
    public LineGraphView(Context context, AttributeSet attributes) {
        super(context, attributes);
    }

    @Override
    protected void drawAscendingSection(Canvas canvas, float[] coords) {
        canvas.drawLine(coords[0], coords[1], coords[2], coords[3], mAscendingPaint);
    }

    @Override
    protected void drawDescendingSection(Canvas canvas, float[] coords) {
        canvas.drawLine(coords[0], coords[1], coords[2], coords[3], mDescendingPaint);
    }
}