package cn.sinata.xldutils.view;
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import android.graphics.Matrix;
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import android.graphics.RectF;
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import android.view.MotionEvent;
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public interface ZoomableController {
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/**
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* Listener interface.
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*/
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public interface Listener {
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/**
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* Notifies the view that the transform changed.
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*
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* @param transform the new matrix
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*/
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void onTransformChanged(Matrix transform);
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}
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/**
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* Enables the controller. The controller is enabled when the image has been loaded.
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*
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* @param enabled whether to enable the controller
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*/
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void setEnabled(boolean enabled);
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/**
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* Gets whether the controller is enabled. This should return the last value passed to
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* {@link #setEnabled}.
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*
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* @return whether the controller is enabled.
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*/
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boolean isEnabled();
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/**
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* Sets the listener for the controller to call back when the matrix changes.
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*
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* @param listener the listener
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*/
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void setListener(Listener listener);
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/**
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* Gets the current scale factor. A convenience method for calculating the scale from the
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* transform.
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*
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* @return the current scale factor
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*/
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float getScaleFactor();
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/**
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* Gets the current transform.
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*
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* @return the transform
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*/
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Matrix getTransform();
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/**
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* Sets the bounds of the image post transform prior to application of the zoomable
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* transformation.
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*
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* @param imageBounds the bounds of the image
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*/
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void setImageBounds(RectF imageBounds);
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/**
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* Sets the bounds of the view.
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*
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* @param viewBounds the bounds of the view
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*/
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void setViewBounds(RectF viewBounds);
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/**
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* Allows the controller to handle a touch event.
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*
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* @param event the touch event
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* @return whether the controller handled the event
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*/
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boolean onTouchEvent(MotionEvent event);
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}
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