implement resizeable imageview for image pager
This commit is contained in:
Andrew Dolgov
parent
1accc3749f
commit
4ac2b72796
@ -0,0 +1,268 @@
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package it.sephiroth.android.library.imagezoom;
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import android.content.Context;
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import android.graphics.Matrix;
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import android.graphics.Rect;
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import android.graphics.RectF;
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import android.graphics.drawable.Drawable;
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import android.util.AttributeSet;
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import android.util.Log;
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import android.view.GestureDetector;
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import android.view.GestureDetector.OnGestureListener;
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import android.view.MotionEvent;
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import android.view.ScaleGestureDetector;
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import android.view.ScaleGestureDetector.OnScaleGestureListener;
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import android.view.ViewConfiguration;
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public class ImageViewTouch extends ImageViewTouchBase {
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private static final float SCROLL_DELTA_THRESHOLD = 1.0f;
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static final float MIN_ZOOM = 0.9f;
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protected ScaleGestureDetector mScaleDetector;
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protected GestureDetector mGestureDetector;
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protected int mTouchSlop;
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protected float mCurrentScaleFactor;
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protected float mScaleFactor;
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protected int mDoubleTapDirection;
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protected OnGestureListener mGestureListener;
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protected OnScaleGestureListener mScaleListener;
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protected boolean mDoubleTapToZoomEnabled = true;
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protected boolean mScaleEnabled = true;
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protected boolean mScrollEnabled = true;
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private OnImageViewTouchDoubleTapListener doubleTapListener;
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public interface OnScaleChangedListener {
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public void onScaleChanged(float scale);
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}
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protected OnScaleChangedListener mScaleChangedListener;
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public ImageViewTouch( Context context, AttributeSet attrs ) {
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super( context, attrs );
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}
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@Override
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protected void init() {
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super.init();
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mTouchSlop = ViewConfiguration.get(getContext()).getScaledTouchSlop();
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mGestureListener = getGestureListener();
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mScaleListener = getScaleListener();
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mScaleDetector = new ScaleGestureDetector( getContext(), mScaleListener );
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mGestureDetector = new GestureDetector( getContext(), mGestureListener, null, true );
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mCurrentScaleFactor = 1f;
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mDoubleTapDirection = 1;
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}
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public void setDoubleTapListener( OnImageViewTouchDoubleTapListener doubleTapListener ){
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this.doubleTapListener = doubleTapListener;
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}
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public void setDoubleTapToZoomEnabled( boolean value ) {
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mDoubleTapToZoomEnabled = value;
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}
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public void setScaleEnabled( boolean value ) {
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mScaleEnabled = value;
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}
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public void setScrollEnabled( boolean value ) {
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mScrollEnabled = value;
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}
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public boolean getDoubleTapEnabled() {
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return mDoubleTapToZoomEnabled;
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}
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protected OnGestureListener getGestureListener() {
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return new GestureListener();
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}
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protected OnScaleGestureListener getScaleListener() {
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return new ScaleListener();
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}
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@Override
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protected void onBitmapChanged( Drawable drawable ) {
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super.onBitmapChanged( drawable );
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float v[] = new float[9];
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mSuppMatrix.getValues( v );
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mCurrentScaleFactor = v[Matrix.MSCALE_X];
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}
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@Override
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protected void _setImageDrawable( final Drawable drawable, final boolean reset, final Matrix initial_matrix, final float maxZoom ) {
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super._setImageDrawable( drawable, reset, initial_matrix, maxZoom );
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mScaleFactor = getMaxZoom() / 3;
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}
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@Override
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public boolean onTouchEvent( MotionEvent event ) {
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mScaleDetector.onTouchEvent( event );
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if ( !mScaleDetector.isInProgress() ) mGestureDetector.onTouchEvent( event );
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int action = event.getAction();
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switch ( action & MotionEvent.ACTION_MASK ) {
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case MotionEvent.ACTION_UP:
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if ( getScale() < 1f ) {
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zoomTo( 1f, 50 );
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}
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break;
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}
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return true;
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}
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@Override
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protected void onZoom( float scale ) {
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super.onZoom( scale );
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if ( !mScaleDetector.isInProgress() ) mCurrentScaleFactor = scale;
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if (mScaleChangedListener != null) {
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mScaleChangedListener.onScaleChanged(mCurrentScaleFactor);
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}
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}
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protected float onDoubleTapPost( float scale, float maxZoom ) {
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if ( mDoubleTapDirection == 1 ) {
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if (mCurrentScaleFactor - 1.0f < 0.01) { //( scale + ( mScaleFactor * 2 ) ) <= maxZoom
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float scaleFactor = mScaleFactor;
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RectF bitmapRect = getBitmapRect();
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float w = bitmapRect.right - bitmapRect.left;
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float h = bitmapRect.bottom - bitmapRect.top;
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if (w < getWidth()) {
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scaleFactor = (float)getWidth() / w - scale;
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} else if (h < getHeight()) {
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scaleFactor = (float)getHeight() / h - scale;
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}
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return scale + scaleFactor;
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} else {
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mDoubleTapDirection = -1;
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return maxZoom;
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}
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} else {
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mDoubleTapDirection = 1;
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return 1f;
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}
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}
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/**
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* Determines whether this ImageViewTouch can be scrolled.
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* @param direction
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* - positive direction value means scroll from right to left,
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* negative value means scroll from left to right
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*
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* @return true if there is some more place to scroll, false - otherwise.
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*/
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public boolean canScroll(int direction) {
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RectF bitmapRect = getBitmapRect();
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updateRect(bitmapRect, mScrollRect);
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Rect imageViewRect = new Rect();
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getGlobalVisibleRect(imageViewRect);
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if (bitmapRect.right >= imageViewRect.right) {
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if (direction < 0) {
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return Math.abs(bitmapRect.right - imageViewRect.right) > SCROLL_DELTA_THRESHOLD;
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}
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}
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double bitmapScrollRectDelta = Math.abs(bitmapRect.left - mScrollRect.left);
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return bitmapScrollRectDelta > SCROLL_DELTA_THRESHOLD;
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}
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public class GestureListener extends GestureDetector.SimpleOnGestureListener {
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@Override
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public boolean onDoubleTap( MotionEvent e ) {
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Log.i( LOG_TAG, "onDoubleTap. double tap enabled? " + mDoubleTapToZoomEnabled);
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if (mDoubleTapToZoomEnabled) {
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float scale = getScale();
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float targetScale = scale;
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targetScale = onDoubleTapPost( scale, getMaxZoom() );
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targetScale = Math.min( getMaxZoom(), Math.max( targetScale, MIN_ZOOM ) );
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mCurrentScaleFactor = targetScale;
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zoomTo( targetScale, e.getX(), e.getY(), 200 );
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invalidate();
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}
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if( null != doubleTapListener ){
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doubleTapListener.onDoubleTap();
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}
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return super.onDoubleTap( e );
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}
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@Override
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public void onLongPress( MotionEvent e ) {
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if ( isLongClickable() ) {
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if ( !mScaleDetector.isInProgress() ) {
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setPressed( true );
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performLongClick();
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}
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}
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}
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@Override
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public boolean onScroll( MotionEvent e1, MotionEvent e2, float distanceX, float distanceY ) {
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if ( !mScrollEnabled ) return false;
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if ( e1 == null || e2 == null ) return false;
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if ( e1.getPointerCount() > 1 || e2.getPointerCount() > 1 ) return false;
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if ( mScaleDetector.isInProgress() ) return false;
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if ( getScale() == 1f ) return false;
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scrollBy( -distanceX, -distanceY );
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invalidate();
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return super.onScroll( e1, e2, distanceX, distanceY );
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}
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@Override
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public boolean onFling( MotionEvent e1, MotionEvent e2, float velocityX, float velocityY ) {
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if ( !mScrollEnabled ) return false;
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if ( e1.getPointerCount() > 1 || e2.getPointerCount() > 1 ) return false;
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if ( mScaleDetector.isInProgress() ) return false;
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float diffX = e2.getX() - e1.getX();
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float diffY = e2.getY() - e1.getY();
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if ( Math.abs( velocityX ) > 800 || Math.abs( velocityY ) > 800 ) {
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scrollBy( diffX / 2, diffY / 2, 300 );
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invalidate();
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}
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return super.onFling( e1, e2, velocityX, velocityY );
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}
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}
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public class ScaleListener extends ScaleGestureDetector.SimpleOnScaleGestureListener {
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@SuppressWarnings("unused")
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@Override
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public boolean onScale( ScaleGestureDetector detector ) {
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float span = detector.getCurrentSpan() - detector.getPreviousSpan();
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float targetScale = mCurrentScaleFactor * detector.getScaleFactor();
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if ( mScaleEnabled ) {
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targetScale = Math.min( getMaxZoom(), Math.max( targetScale, MIN_ZOOM ) );
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zoomTo( targetScale, detector.getFocusX(), detector.getFocusY() );
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mCurrentScaleFactor = Math.min( getMaxZoom(), Math.max( targetScale, MIN_ZOOM ) );
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mDoubleTapDirection = 1;
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invalidate();
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return true;
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}
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return false;
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}
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}
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public interface OnImageViewTouchDoubleTapListener {
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void onDoubleTap();
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}
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public void setOnScaleChangedListener(OnScaleChangedListener listener) {
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mScaleChangedListener = listener;
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}
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}
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@ -0,0 +1,509 @@
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package it.sephiroth.android.library.imagezoom;
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import it.sephiroth.android.library.imagezoom.easing.Cubic;
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import it.sephiroth.android.library.imagezoom.easing.Easing;
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import it.sephiroth.android.library.imagezoom.graphics.FastBitmapDrawable;
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import it.sephiroth.android.library.imagezoom.utils.IDisposable;
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import android.content.Context;
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import android.graphics.Bitmap;
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import android.graphics.Matrix;
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import android.graphics.RectF;
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import android.graphics.drawable.Drawable;
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import android.os.Handler;
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import android.util.AttributeSet;
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import android.util.Log;
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import android.widget.ImageView;
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/**
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* Base View to manage image zoom/scrool/pinch operations
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*
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* @author alessandro
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*
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*/
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public class ImageViewTouchBase extends ImageView implements IDisposable {
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public interface OnBitmapChangedListener {
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void onBitmapChanged( Drawable drawable );
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};
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public static final String LOG_TAG = "image";
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protected Easing mEasing = new Cubic();
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protected Matrix mBaseMatrix = new Matrix();
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protected Matrix mSuppMatrix = new Matrix();
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protected Handler mHandler = new Handler();
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protected Runnable mOnLayoutRunnable = null;
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protected float mMaxZoom;
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protected final Matrix mDisplayMatrix = new Matrix();
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protected final float[] mMatrixValues = new float[9];
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protected int mThisWidth = -1, mThisHeight = -1;
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protected boolean mFitToScreen = false;
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protected boolean mFitToWidth = false;
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final protected float MAX_ZOOM = 3.0f;
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protected RectF mBitmapRect = new RectF();
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protected RectF mCenterRect = new RectF();
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protected RectF mScrollRect = new RectF();
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private OnBitmapChangedListener mListener;
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public ImageViewTouchBase( Context context ) {
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super( context );
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init();
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}
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public ImageViewTouchBase( Context context, AttributeSet attrs ) {
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super( context, attrs );
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init();
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}
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public void setOnBitmapChangedListener( OnBitmapChangedListener listener ) {
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mListener = listener;
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}
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protected void init() {
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setScaleType( ImageView.ScaleType.MATRIX );
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}
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public void clear() {
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setImageBitmap( null, true );
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}
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public void setFitToScreen( boolean value ) {
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if ( value != mFitToScreen ) {
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mFitToScreen = value;
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requestLayout();
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}
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}
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public void setFitToWidth( boolean value ) {
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if ( value != mFitToWidth ) {
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mFitToWidth = value;
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requestLayout();
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}
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}
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@Override
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protected void onLayout( boolean changed, int left, int top, int right, int bottom ) {
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super.onLayout( changed, left, top, right, bottom );
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mThisWidth = right - left;
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mThisHeight = bottom - top;
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Runnable r = mOnLayoutRunnable;
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if ( r != null ) {
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mOnLayoutRunnable = null;
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r.run();
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}
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if ( getDrawable() != null ) {
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if ( mFitToScreen )
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getProperBaseMatrix2( getDrawable(), mBaseMatrix );
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else
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getProperBaseMatrix( getDrawable(), mBaseMatrix );
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setImageMatrix( getImageViewMatrix() );
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if (mFitToWidth) zoomToWidth();
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}
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}
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@Override
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public void setImageBitmap( Bitmap bm ) {
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setImageBitmap( bm, true );
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}
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@Override
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public void setImageResource( int resId ) {
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setImageDrawable( getContext().getResources().getDrawable( resId ) );
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}
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/**
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* Set the new image to display and reset the internal matrix.
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*
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* @param bitmap
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* - the {@link Bitmap} to display
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* @param reset
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* - if true the image bounds will be recreated, otherwise the old {@link Matrix} is used to display the new bitmap
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* @see #setImageBitmap(Bitmap)
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*/
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public void setImageBitmap( final Bitmap bitmap, final boolean reset ) {
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setImageBitmap( bitmap, reset, null );
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}
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/**
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* Similar to {@link #setImageBitmap(Bitmap, boolean)} but an optional view {@link Matrix} can be passed to determine the new
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* bitmap view matrix.<br />
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* This method is useful if you need to restore a Bitmap with the same zoom/pan values from a previous state
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*
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* @param bitmap
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* - the {@link Bitmap} to display
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* @param reset
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* @param matrix
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* - the {@link Matrix} to be used to display the new bitmap
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*
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* @see #setImageBitmap(Bitmap, boolean)
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* @see #setImageBitmap(Bitmap)
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* @see #getImageViewMatrix()
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* @see #getDisplayMatrix()
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*/
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public void setImageBitmap( final Bitmap bitmap, final boolean reset, Matrix matrix ) {
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setImageBitmap( bitmap, reset, matrix, -1 );
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}
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/**
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*
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* @param bitmap
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* @param reset
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* @param matrix
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* @param maxZoom
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* - maximum zoom allowd during zoom gestures
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*
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* @see #setImageBitmap(Bitmap, boolean, Matrix)
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*/
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public void setImageBitmap( final Bitmap bitmap, final boolean reset, Matrix matrix, float maxZoom ) {
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Log.i( LOG_TAG, "setImageBitmap: " + bitmap );
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if ( bitmap != null )
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setImageDrawable( new FastBitmapDrawable( bitmap ), reset, matrix, maxZoom );
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else
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setImageDrawable( null, reset, matrix, maxZoom );
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}
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@Override
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public void setImageDrawable( Drawable drawable ) {
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setImageDrawable( drawable, true, null, -1 );
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}
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public void setImageDrawable( final Drawable drawable, final boolean reset, final Matrix initial_matrix, final float maxZoom ) {
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final int viewWidth = getWidth();
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if ( viewWidth <= 0 ) {
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mOnLayoutRunnable = new Runnable() {
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@Override
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public void run() {
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setImageDrawable( drawable, reset, initial_matrix, maxZoom );
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}
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};
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return;
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}
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_setImageDrawable( drawable, reset, initial_matrix, maxZoom );
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}
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protected void _setImageDrawable( final Drawable drawable, final boolean reset, final Matrix initial_matrix, final float maxZoom ) {
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if ( drawable != null ) {
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if ( mFitToScreen )
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getProperBaseMatrix2( drawable, mBaseMatrix );
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else
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getProperBaseMatrix( drawable, mBaseMatrix );
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super.setImageDrawable( drawable );
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if (mFitToWidth) zoomToWidth();
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} else {
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mBaseMatrix.reset();
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super.setImageDrawable( null );
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}
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if ( reset ) {
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mSuppMatrix.reset();
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if ( initial_matrix != null ) {
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mSuppMatrix = new Matrix( initial_matrix );
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}
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}
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setImageMatrix( getImageViewMatrix() );
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if ( maxZoom < 1 )
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mMaxZoom = maxZoom();
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else
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mMaxZoom = maxZoom;
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onBitmapChanged( drawable );
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}
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protected void onBitmapChanged( final Drawable bitmap ) {
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if ( mListener != null ) {
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mListener.onBitmapChanged( bitmap );
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}
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}
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protected float maxZoom() {
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final Drawable drawable = getDrawable();
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if ( drawable == null ) {
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return 1F;
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}
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float fw = (float) drawable.getIntrinsicWidth() / (float) mThisWidth;
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float fh = (float) drawable.getIntrinsicHeight() / (float) mThisHeight;
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float max = Math.max( fw, fh ) * 4;
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return max;
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}
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public float getMaxZoom() {
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return mMaxZoom;
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||||
}
|
||||
|
||||
public Matrix getImageViewMatrix() {
|
||||
mDisplayMatrix.set( mBaseMatrix );
|
||||
mDisplayMatrix.postConcat( mSuppMatrix );
|
||||
return mDisplayMatrix;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the current image display matrix. This matrix can be used in the next call to the
|
||||
* {@link #setImageBitmap(Bitmap, boolean, Matrix)} to restore the same view state of the previous {@link Bitmap}
|
||||
*
|
||||
* @return
|
||||
*/
|
||||
public Matrix getDisplayMatrix() {
|
||||
return new Matrix( mSuppMatrix );
|
||||
}
|
||||
|
||||
/**
|
||||
* Setup the base matrix so that the image is centered and scaled properly.
|
||||
*
|
||||
* @param bitmap
|
||||
* @param matrix
|
||||
*/
|
||||
protected void getProperBaseMatrix( Drawable drawable, Matrix matrix ) {
|
||||
float viewWidth = getWidth();
|
||||
float viewHeight = getHeight();
|
||||
float w = drawable.getIntrinsicWidth();
|
||||
float h = drawable.getIntrinsicHeight();
|
||||
matrix.reset();
|
||||
|
||||
if ( w > viewWidth || h > viewHeight ) {
|
||||
float widthScale = Math.min( viewWidth / w, 2.0f );
|
||||
float heightScale = Math.min( viewHeight / h, 2.0f );
|
||||
float scale = Math.min( widthScale, heightScale );
|
||||
matrix.postScale( scale, scale );
|
||||
float tw = ( viewWidth - w * scale ) / 2.0f;
|
||||
float th = ( viewHeight - h * scale ) / 2.0f;
|
||||
matrix.postTranslate( tw, th );
|
||||
} else {
|
||||
float tw = ( viewWidth - w ) / 2.0f;
|
||||
float th = ( viewHeight - h ) / 2.0f;
|
||||
matrix.postTranslate( tw, th );
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Setup the base matrix so that the image is centered and scaled properly.
|
||||
*
|
||||
* @param bitmap
|
||||
* @param matrix
|
||||
*/
|
||||
protected void getProperBaseMatrix2( Drawable bitmap, Matrix matrix ) {
|
||||
float viewWidth = getWidth();
|
||||
float viewHeight = getHeight();
|
||||
float w = bitmap.getIntrinsicWidth();
|
||||
float h = bitmap.getIntrinsicHeight();
|
||||
matrix.reset();
|
||||
float widthScale = Math.min( viewWidth / w, MAX_ZOOM );
|
||||
float heightScale = Math.min( viewHeight / h, MAX_ZOOM );
|
||||
float scale = Math.min( widthScale, heightScale );
|
||||
matrix.postScale( scale, scale );
|
||||
matrix.postTranslate( ( viewWidth - w * scale ) / 2.0f, ( viewHeight - h * scale ) / 2.0f );
|
||||
}
|
||||
|
||||
protected float getValue( Matrix matrix, int whichValue ) {
|
||||
matrix.getValues( mMatrixValues );
|
||||
return mMatrixValues[whichValue];
|
||||
}
|
||||
|
||||
protected RectF getBitmapRect() {
|
||||
final Drawable drawable = getDrawable();
|
||||
|
||||
if ( drawable == null ) return null;
|
||||
Matrix m = getImageViewMatrix();
|
||||
mBitmapRect.set( 0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight() );
|
||||
m.mapRect( mBitmapRect );
|
||||
return mBitmapRect;
|
||||
}
|
||||
|
||||
protected float getScale( Matrix matrix ) {
|
||||
return getValue( matrix, Matrix.MSCALE_X );
|
||||
}
|
||||
|
||||
public float getRotation() {
|
||||
return 0;
|
||||
}
|
||||
|
||||
public float getScale() {
|
||||
return getScale( mSuppMatrix );
|
||||
}
|
||||
|
||||
protected void center( boolean horizontal, boolean vertical ) {
|
||||
// Log.i(LOG_TAG, "center");
|
||||
final Drawable drawable = getDrawable();
|
||||
|
||||
if ( drawable == null ) return;
|
||||
RectF rect = getCenter( horizontal, vertical );
|
||||
if ( rect.left != 0 || rect.top != 0 ) {
|
||||
postTranslate( rect.left, rect.top );
|
||||
}
|
||||
}
|
||||
|
||||
protected RectF getCenter( boolean horizontal, boolean vertical ) {
|
||||
final Drawable drawable = getDrawable();
|
||||
|
||||
if ( drawable == null ) return new RectF( 0, 0, 0, 0 );
|
||||
|
||||
RectF rect = getBitmapRect();
|
||||
float height = rect.height();
|
||||
float width = rect.width();
|
||||
float deltaX = 0, deltaY = 0;
|
||||
if ( vertical ) {
|
||||
int viewHeight = getHeight();
|
||||
if ( height < viewHeight ) {
|
||||
deltaY = ( viewHeight - height ) / 2 - rect.top;
|
||||
} else if ( rect.top > 0 ) {
|
||||
deltaY = -rect.top;
|
||||
} else if ( rect.bottom < viewHeight ) {
|
||||
deltaY = getHeight() - rect.bottom;
|
||||
}
|
||||
}
|
||||
if ( horizontal ) {
|
||||
int viewWidth = getWidth();
|
||||
if ( width < viewWidth ) {
|
||||
deltaX = ( viewWidth - width ) / 2 - rect.left;
|
||||
} else if ( rect.left > 0 ) {
|
||||
deltaX = -rect.left;
|
||||
} else if ( rect.right < viewWidth ) {
|
||||
deltaX = viewWidth - rect.right;
|
||||
}
|
||||
}
|
||||
mCenterRect.set( deltaX, deltaY, 0, 0 );
|
||||
return mCenterRect;
|
||||
}
|
||||
|
||||
protected void postTranslate( float deltaX, float deltaY ) {
|
||||
mSuppMatrix.postTranslate( deltaX, deltaY );
|
||||
setImageMatrix( getImageViewMatrix() );
|
||||
}
|
||||
|
||||
protected void postScale( float scale, float centerX, float centerY ) {
|
||||
mSuppMatrix.postScale( scale, scale, centerX, centerY );
|
||||
setImageMatrix( getImageViewMatrix() );
|
||||
}
|
||||
|
||||
protected void zoomTo( float scale ) {
|
||||
float cx = getWidth() / 2F;
|
||||
float cy = getHeight() / 2F;
|
||||
zoomTo( scale, cx, cy );
|
||||
}
|
||||
|
||||
public void zoomTo( float scale, float durationMs ) {
|
||||
float cx = getWidth() / 2F;
|
||||
float cy = getHeight() / 2F;
|
||||
zoomTo( scale, cx, cy, durationMs );
|
||||
}
|
||||
|
||||
protected void zoomTo( float scale, float centerX, float centerY ) {
|
||||
if ( scale > mMaxZoom ) scale = mMaxZoom;
|
||||
float oldScale = getScale();
|
||||
float deltaScale = scale / oldScale;
|
||||
postScale( deltaScale, centerX, centerY );
|
||||
onZoom( getScale() );
|
||||
center( true, true );
|
||||
}
|
||||
|
||||
protected void onZoom( float scale ) {}
|
||||
|
||||
public void scrollBy( float x, float y ) {
|
||||
panBy( x, y );
|
||||
}
|
||||
|
||||
protected void panBy( double dx, double dy ) {
|
||||
RectF rect = getBitmapRect();
|
||||
mScrollRect.set( (float) dx, (float) dy, 0, 0 );
|
||||
updateRect( rect, mScrollRect );
|
||||
postTranslate( mScrollRect.left, mScrollRect.top );
|
||||
center( true, true );
|
||||
}
|
||||
|
||||
protected void updateRect( RectF bitmapRect, RectF scrollRect ) {
|
||||
float width = getWidth();
|
||||
float height = getHeight();
|
||||
|
||||
if ( bitmapRect.top >= 0 && bitmapRect.bottom <= height ) scrollRect.top = 0;
|
||||
if ( bitmapRect.left >= 0 && bitmapRect.right <= width ) scrollRect.left = 0;
|
||||
if ( bitmapRect.top + scrollRect.top >= 0 && bitmapRect.bottom > height ) scrollRect.top = (int) ( 0 - bitmapRect.top );
|
||||
if ( bitmapRect.bottom + scrollRect.top <= ( height - 0 ) && bitmapRect.top < 0 )
|
||||
scrollRect.top = (int) ( ( height - 0 ) - bitmapRect.bottom );
|
||||
if ( bitmapRect.left + scrollRect.left >= 0 ) scrollRect.left = (int) ( 0 - bitmapRect.left );
|
||||
if ( bitmapRect.right + scrollRect.left <= ( width - 0 ) ) scrollRect.left = (int) ( ( width - 0 ) - bitmapRect.right );
|
||||
// Log.d( LOG_TAG, "scrollRect(2): " + scrollRect.toString() );
|
||||
}
|
||||
|
||||
protected void scrollBy( float distanceX, float distanceY, final double durationMs ) {
|
||||
final double dx = distanceX;
|
||||
final double dy = distanceY;
|
||||
final long startTime = System.currentTimeMillis();
|
||||
mHandler.post( new Runnable() {
|
||||
|
||||
double old_x = 0;
|
||||
double old_y = 0;
|
||||
|
||||
@Override
|
||||
public void run() {
|
||||
long now = System.currentTimeMillis();
|
||||
double currentMs = Math.min( durationMs, now - startTime );
|
||||
double x = mEasing.easeOut( currentMs, 0, dx, durationMs );
|
||||
double y = mEasing.easeOut( currentMs, 0, dy, durationMs );
|
||||
panBy( ( x - old_x ), ( y - old_y ) );
|
||||
old_x = x;
|
||||
old_y = y;
|
||||
if ( currentMs < durationMs ) {
|
||||
mHandler.post( this );
|
||||
} else {
|
||||
RectF centerRect = getCenter( true, true );
|
||||
if ( centerRect.left != 0 || centerRect.top != 0 ) scrollBy( centerRect.left, centerRect.top );
|
||||
}
|
||||
}
|
||||
} );
|
||||
}
|
||||
|
||||
protected void zoomTo( float scale, final float centerX, final float centerY, final float durationMs ) {
|
||||
// Log.i( LOG_TAG, "zoomTo: " + scale + ", " + centerX + ": " + centerY );
|
||||
final long startTime = System.currentTimeMillis();
|
||||
final float incrementPerMs = ( scale - getScale() ) / durationMs;
|
||||
final float oldScale = getScale();
|
||||
mHandler.post( new Runnable() {
|
||||
|
||||
@Override
|
||||
public void run() {
|
||||
long now = System.currentTimeMillis();
|
||||
float currentMs = Math.min( durationMs, now - startTime );
|
||||
float target = oldScale + ( incrementPerMs * currentMs );
|
||||
zoomTo( target, centerX, centerY );
|
||||
if ( currentMs < durationMs ) {
|
||||
mHandler.post( this );
|
||||
} else {
|
||||
// if ( getScale() < 1f ) {}
|
||||
}
|
||||
}
|
||||
} );
|
||||
}
|
||||
|
||||
@Override
|
||||
public void dispose() {
|
||||
clear();
|
||||
}
|
||||
|
||||
protected void zoomToWidth() {
|
||||
RectF bitmapRect = getBitmapRect();
|
||||
|
||||
float w = bitmapRect.right - bitmapRect.left;
|
||||
|
||||
if (w < getWidth()) {
|
||||
float scale = (float)getWidth() / w;
|
||||
|
||||
zoomTo(scale, 0f, 0f);
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,20 @@
|
||||
package it.sephiroth.android.library.imagezoom.easing;
|
||||
|
||||
public class Cubic implements Easing {
|
||||
|
||||
@Override
|
||||
public double easeOut( double time, double start, double end, double duration ) {
|
||||
return end * ( ( time = time / duration - 1.0 ) * time * time + 1.0 ) + start;
|
||||
}
|
||||
|
||||
@Override
|
||||
public double easeIn( double time, double start, double end, double duration ) {
|
||||
return end * ( time /= duration ) * time * time + start;
|
||||
}
|
||||
|
||||
@Override
|
||||
public double easeInOut( double time, double start, double end, double duration ) {
|
||||
if ( ( time /= duration / 2.0 ) < 1.0 ) return end / 2.0 * time * time * time + start;
|
||||
return end / 2.0 * ( ( time -= 2.0 ) * time * time + 2.0 ) + start;
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,10 @@
|
||||
package it.sephiroth.android.library.imagezoom.easing;
|
||||
|
||||
public interface Easing {
|
||||
|
||||
double easeOut( double time, double start, double end, double duration );
|
||||
|
||||
double easeIn( double time, double start, double end, double duration );
|
||||
|
||||
double easeInOut( double time, double start, double end, double duration );
|
||||
}
|
||||
@ -0,0 +1,84 @@
|
||||
package it.sephiroth.android.library.imagezoom.graphics;
|
||||
|
||||
import java.io.InputStream;
|
||||
import android.content.res.Resources;
|
||||
import android.graphics.Bitmap;
|
||||
import android.graphics.BitmapFactory;
|
||||
import android.graphics.Canvas;
|
||||
import android.graphics.ColorFilter;
|
||||
import android.graphics.Paint;
|
||||
import android.graphics.PixelFormat;
|
||||
import android.graphics.drawable.Drawable;
|
||||
|
||||
/**
|
||||
* Fast bitmap drawable. Does not support states. it only
|
||||
* support alpha and colormatrix
|
||||
* @author alessandro
|
||||
*
|
||||
*/
|
||||
public class FastBitmapDrawable extends Drawable implements IBitmapDrawable {
|
||||
|
||||
protected Bitmap mBitmap;
|
||||
protected Paint mPaint;
|
||||
|
||||
public FastBitmapDrawable( Bitmap b ) {
|
||||
mBitmap = b;
|
||||
mPaint = new Paint();
|
||||
mPaint.setDither( true );
|
||||
mPaint.setFilterBitmap( true );
|
||||
}
|
||||
|
||||
public FastBitmapDrawable( Resources res, InputStream is ){
|
||||
this(BitmapFactory.decodeStream(is));
|
||||
}
|
||||
|
||||
@Override
|
||||
public void draw( Canvas canvas ) {
|
||||
canvas.drawBitmap( mBitmap, 0.0f, 0.0f, mPaint );
|
||||
}
|
||||
|
||||
@Override
|
||||
public int getOpacity() {
|
||||
return PixelFormat.TRANSLUCENT;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void setAlpha( int alpha ) {
|
||||
mPaint.setAlpha( alpha );
|
||||
}
|
||||
|
||||
@Override
|
||||
public void setColorFilter( ColorFilter cf ) {
|
||||
mPaint.setColorFilter( cf );
|
||||
}
|
||||
|
||||
@Override
|
||||
public int getIntrinsicWidth() {
|
||||
return mBitmap.getWidth();
|
||||
}
|
||||
|
||||
@Override
|
||||
public int getIntrinsicHeight() {
|
||||
return mBitmap.getHeight();
|
||||
}
|
||||
|
||||
@Override
|
||||
public int getMinimumWidth() {
|
||||
return mBitmap.getWidth();
|
||||
}
|
||||
|
||||
@Override
|
||||
public int getMinimumHeight() {
|
||||
return mBitmap.getHeight();
|
||||
}
|
||||
|
||||
public void setAntiAlias( boolean value ){
|
||||
mPaint.setAntiAlias( value );
|
||||
invalidateSelf();
|
||||
}
|
||||
|
||||
@Override
|
||||
public Bitmap getBitmap() {
|
||||
return mBitmap;
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,14 @@
|
||||
package it.sephiroth.android.library.imagezoom.graphics;
|
||||
|
||||
import it.sephiroth.android.library.imagezoom.ImageViewTouchBase;
|
||||
import android.graphics.Bitmap;
|
||||
|
||||
/**
|
||||
* Base interface used in the {@link ImageViewTouchBase} view
|
||||
* @author alessandro
|
||||
*
|
||||
*/
|
||||
public interface IBitmapDrawable {
|
||||
|
||||
Bitmap getBitmap();
|
||||
}
|
||||
@ -0,0 +1,6 @@
|
||||
package it.sephiroth.android.library.imagezoom.utils;
|
||||
|
||||
public interface IDisposable {
|
||||
|
||||
void dispose();
|
||||
}
|
||||
@ -11,11 +11,14 @@ import android.os.Bundle;
|
||||
import android.preference.PreferenceManager;
|
||||
import android.support.v4.view.PagerAdapter;
|
||||
import android.support.v4.view.ViewPager;
|
||||
import android.support.v7.app.ActionBar;
|
||||
import android.util.Log;
|
||||
import android.view.ContextMenu;
|
||||
import android.view.GestureDetector;
|
||||
import android.view.LayoutInflater;
|
||||
import android.view.Menu;
|
||||
import android.view.MenuItem;
|
||||
import android.view.MotionEvent;
|
||||
import android.view.View;
|
||||
import android.view.ViewGroup;
|
||||
import android.view.WindowManager;
|
||||
@ -38,7 +41,9 @@ import org.jsoup.select.Elements;
|
||||
import java.util.ArrayList;
|
||||
import java.util.List;
|
||||
|
||||
public class ArticleImagesPagerActivity extends CommonActivity {
|
||||
import it.sephiroth.android.library.imagezoom.ImageViewTouch;
|
||||
|
||||
public class ArticleImagesPagerActivity extends CommonActivity implements GestureDetector.OnDoubleTapListener {
|
||||
private final String TAG = this.getClass().getSimpleName();
|
||||
|
||||
private ArrayList<String> m_urls;
|
||||
@ -46,6 +51,30 @@ public class ArticleImagesPagerActivity extends CommonActivity {
|
||||
private String m_title;
|
||||
private ArticleImagesPagerAdapter m_adapter;
|
||||
private String m_content;
|
||||
private GestureDetector m_detector;
|
||||
|
||||
@Override
|
||||
public boolean onSingleTapConfirmed(MotionEvent motionEvent) {
|
||||
ActionBar bar = getSupportActionBar();
|
||||
|
||||
if (bar.isShowing()) {
|
||||
bar.hide();
|
||||
} else {
|
||||
bar.show();
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
@Override
|
||||
public boolean onDoubleTap(MotionEvent motionEvent) {
|
||||
return false;
|
||||
}
|
||||
|
||||
@Override
|
||||
public boolean onDoubleTapEvent(MotionEvent motionEvent) {
|
||||
return false;
|
||||
}
|
||||
|
||||
private class ArticleImagesPagerAdapter extends PagerAdapter {
|
||||
private List<String> m_urls;
|
||||
@ -80,8 +109,21 @@ public class ArticleImagesPagerActivity extends CommonActivity {
|
||||
|
||||
View view = inflater.inflate(R.layout.article_images_image, null);
|
||||
|
||||
ImageView imgView = (ImageView) view.findViewById(R.id.flavor_image);
|
||||
//imgView.setOnClickListener(this);
|
||||
m_detector = new GestureDetector(ArticleImagesPagerActivity.this, new GestureDetector.SimpleOnGestureListener());
|
||||
|
||||
m_detector.setOnDoubleTapListener(ArticleImagesPagerActivity.this);
|
||||
|
||||
ImageViewTouch imgView = (ImageViewTouch) view.findViewById(R.id.flavor_image);
|
||||
|
||||
imgView.setFitToScreen(true);
|
||||
imgView.setFitToWidth(true);
|
||||
|
||||
imgView.setOnTouchListener(new View.OnTouchListener() {
|
||||
@Override
|
||||
public boolean onTouch(View view, MotionEvent event) {
|
||||
return m_detector.onTouchEvent(event);
|
||||
}
|
||||
});
|
||||
|
||||
registerForContextMenu(imgView);
|
||||
|
||||
|
||||
@ -18,7 +18,7 @@
|
||||
android:layout_gravity="center"
|
||||
android:id="@+id/flavor_image_progress" />
|
||||
|
||||
<org.fox.ttrss.util.EnlargingImageView
|
||||
<it.sephiroth.android.library.imagezoom.ImageViewTouch
|
||||
android:id="@+id/flavor_image"
|
||||
android:layout_width="match_parent"
|
||||
android:layout_height="match_parent"
|
||||
|
||||
Loading…
Reference in New Issue
Block a user