Android Open Source - GuiLib Photo View

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License

The source code is released under:
Apache License
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Java Source Code

/*******************************************************************************
 * Copyright 2011, 2012 Chris Banes.// ww w . j ava  2  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 uk.co.senab.photoview;

import uk.co.senab.photoview.PhotoViewAttacher.OnMatrixChangedListener;
import uk.co.senab.photoview.PhotoViewAttacher.OnPhotoTapListener;
import android.annotation.TargetApi;
import android.content.Context;
import android.graphics.RectF;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.ImageView;

@TargetApi(9)
public class PhotoView extends ImageView {

  private final PhotoViewAttacher mAttacher;

  public PhotoView(Context context) {
    super(context);
    super.setScaleType(ScaleType.MATRIX);
    mAttacher = new PhotoViewAttacher(this);
  }

  public PhotoView(Context context, AttributeSet attr) {
    super(context, attr);
    super.setScaleType(ScaleType.MATRIX);
    mAttacher = new PhotoViewAttacher(this);
  }

  /**
   * Returns true if the PhotoView is set to allow zooming of Photos.
   * 
   * @return true if the PhotoView allows zooming.
   */
  public boolean canZoom() {
    return mAttacher.canZoom();
  }

  /**
   * Gets the Display Rectangle of the currently displayed Drawable. The
   * Rectangle is relative to this View and includes all scaling and
   * translations.
   * 
   * @return - RectF of Displayed Drawable
   */
  public RectF getDisplayRect() {
    return mAttacher.getDisplayRect();
  }

  /**
   * Returns the current scale value
   * 
   * @return float - current scale value
   */
  public float getScale() {
    return mAttacher.getScale();
  }
  
  @Override
  public ScaleType getScaleType() {
    return mAttacher.getScaleType();
  }

  @Override
  public void setImageDrawable(Drawable drawable) {
    super.setImageDrawable(drawable);
    if(mAttacher != null) {
      mAttacher.update();
    }
  }

  /**
   * Register a callback to be invoked when the Matrix has changed for this
   * View. An example would be the user panning or scaling the Photo.
   * 
   * @param listener
   *            - Listener to be registered.
   */
  public void setOnMatrixChangeListener(OnMatrixChangedListener listener) {
    mAttacher.setOnMatrixChangeListener(listener);
  }

  /**
   * Register a callback to be invoked when the Photo displayed by this View
   * is tapped with a single tap.
   * 
   * @param listener
   *            - Listener to be registered.
   */
  public void setOnPhotoTapListener(OnPhotoTapListener listener) {
    mAttacher.setOnPhotoTapListener(listener);
  }
  
  @Override
  public void setScaleType(ScaleType scaleType) {
    mAttacher.setScaleType(scaleType);
  }

  /**
   * Allows you to enable/disable the zoom functionality on the ImageView.
   * When disable the ImageView reverts to using the FIT_CENTER matrix.
   * 
   * @param zoomable
   *            - Whether the zoom functionality is enabled.
   */
  public void setZoomable(boolean zoomable) {
    mAttacher.setZoomable(zoomable);
  }

  /**
   * Zooms to the specified scale, around the focal point given.
   * 
   * @param scale
   *            - Scale to zoom to
   * @param focalX
   *            - X Focus Point
   * @param focalY
   *            - Y Focus Point
   */
  public void zoomTo(float scale, float focalX, float focalY) {
    mAttacher.zoomTo(scale, focalX, focalY);
  }

}
Java Source Code List
