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/**************************************************************
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*
*************************************************************/
#ifndef SD_SLIDESORTER_VISIBLE_AREA_MANAGER_HXX
#define SD_SLIDESORTER_VISIBLE_AREA_MANAGER_HXX
#include "controller/SlsAnimator.hxx"
#include "model/SlsSharedPageDescriptor.hxx"
#include <boost/noncopyable.hpp>
#include <boost/optional.hpp>
namespace sd { namespace slidesorter { namespace controller {
/** Manage requests for scrolling page objects into view.
*/
class VisibleAreaManager
: public ::boost::noncopyable
{
public:
VisibleAreaManager (SlideSorter& rSlideSorter);
~VisibleAreaManager (void);
void ActivateCurrentSlideTracking (void);
void DeactivateCurrentSlideTracking (void);
bool IsCurrentSlideTrackingActive (void) const;
/** Request the current slide to be moved into the visible area.
This request is only obeyed when the current slide tracking is
active.
@see ActivateCurrentSlideTracking() and DeactivateCurrentSlideTracking()
*/
void RequestCurrentSlideVisible (void);
/** Request to make the specified page object visible.
*/
void RequestVisible (
const model::SharedPageDescriptor& rpDescriptor,
const bool bForce = false);
/** Temporarily disable the update of the visible area.
*/
class TemporaryDisabler
{
public:
TemporaryDisabler (SlideSorter& rSlideSorter);
~TemporaryDisabler (void);
private:
VisibleAreaManager& mrVisibleAreaManager;
};
private:
SlideSorter& mrSlideSorter;
/** List of rectangle that someone wants to be moved into the visible
area.
Cleared on every call to ForgetVisibleRequests() and MakeVisible().
*/
::std::vector<Rectangle> maVisibleRequests;
/** Animation id for a scroll animation that sets the top
and left of the visible area to maRequestedVisibleTopLeft.
*/
Animator::AnimationId mnScrollAnimationId;
Point maRequestedVisibleTopLeft;
Animator::AnimationMode meRequestedAnimationMode;
bool mbIsCurrentSlideTrackingActive;
int mnDisableCount;
void MakeVisible (void);
::boost::optional<Point> GetRequestedTopLeft (void) const;
};
} } } // end of namespace ::sd::slidesorter::view
#endif
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