michael@0: /* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: package org.mozilla.gecko.gfx;
michael@0: 
michael@0: import org.mozilla.gecko.GeckoAppShell;
michael@0: import org.mozilla.gecko.EventDispatcher;
michael@0: 
michael@0: import android.graphics.PointF;
michael@0: import android.view.KeyEvent;
michael@0: import android.view.MotionEvent;
michael@0: import android.view.View;
michael@0: 
michael@0: public interface PanZoomController {
michael@0:     // The distance the user has to pan before we recognize it as such (e.g. to avoid 1-pixel pans
michael@0:     // between the touch-down and touch-up of a click). In units of density-independent pixels.
michael@0:     public static final float PAN_THRESHOLD = 1/16f * GeckoAppShell.getDpi();
michael@0: 
michael@0:     // Threshold for sending touch move events to content
michael@0:     public static final float CLICK_THRESHOLD = 1/50f * GeckoAppShell.getDpi();
michael@0: 
michael@0:     static class Factory {
michael@0:         static PanZoomController create(PanZoomTarget target, View view, EventDispatcher dispatcher) {
michael@0:             return new JavaPanZoomController(target, view, dispatcher);
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     public void destroy();
michael@0: 
michael@0:     public boolean onTouchEvent(MotionEvent event);
michael@0:     public boolean onMotionEvent(MotionEvent event);
michael@0:     public boolean onKeyEvent(KeyEvent event);
michael@0:     public void notifyDefaultActionPrevented(boolean prevented);
michael@0: 
michael@0:     public boolean getRedrawHint();
michael@0:     public PointF getVelocityVector();
michael@0: 
michael@0:     public void pageRectUpdated();
michael@0:     public void abortPanning();
michael@0:     public void abortAnimation();
michael@0: 
michael@0:     public void setOverScrollMode(int overscrollMode);
michael@0:     public int getOverScrollMode();
michael@0: 
michael@0:     public void setOverscrollHandler(final Overscroll controller);
michael@0: }