Android Open Source - geoar-app G U I Drawable

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License

The source code is released under:

Apache License

Java Source Code

/**
 * Copyright 2012 52North Initiative for Geospatial Open Source Software GmbH
 *//from  w ww.j  a v a2  s.c  om
 * 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 org.n52.geoar.ar.view.overlay;

import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.RectF;

public abstract class GUIDrawable {

  protected RectF drawableArea;

  public GUIDrawable(RectF area) {
    this.drawableArea = area;
  }

  public void onRenderCanvas(Canvas canvas) {
    canvas.save(Canvas.MATRIX_SAVE_FLAG);
    onRender(canvas);
    canvas.restore();
  }
  
  protected void setFocusToDrawingArea(Canvas canvas){
    Matrix m = new Matrix();
    m.setTranslate(drawableArea.left, drawableArea.top);
    canvas.setMatrix(m);
  }

  protected void setScaleAndFocusToDrawingArea(Canvas canvas) {
    Matrix m = new Matrix();
    m.setScale(drawableArea.bottom - drawableArea.top, drawableArea.right
        - drawableArea.right);
    m.setTranslate(drawableArea.left, drawableArea.top);
    canvas.setMatrix(m);
  }

  protected abstract void initDrawingTools();

  protected abstract void onRender(Canvas canvas);
}

Java Source Code List

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