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95 lines
2.0 KiB
C++
95 lines
2.0 KiB
C++
/*
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* Scrollable.cpp, part of VCMI engine
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*
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* Authors: listed in file AUTHORS in main folder
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*
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* License: GNU General Public License v2.0 or later
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* Full text of license available in license.txt file, in main folder
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*
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*/
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#include "StdInc.h"
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#include "Scrollable.h"
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Scrollable::Scrollable(int used, Point position, Orientation orientation)
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: CIntObject(used | WHEEL | GESTURE, position)
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, scrollStep(1)
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, panningDistanceSingle(32)
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, panningDistanceAccumulated(0)
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, orientation(orientation)
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{
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}
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void Scrollable::gesture(bool on, const Point & initialPosition, const Point & finalPosition)
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{
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panningDistanceAccumulated = 0;
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}
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void Scrollable::wheelScrolled(int distance)
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{
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if (orientation == Orientation::HORIZONTAL)
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scrollBy(distance * scrollStep);
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else
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scrollBy(-distance * scrollStep);
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}
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void Scrollable::gesturePanning(const Point & initialPosition, const Point & currentPosition, const Point & lastUpdateDistance)
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{
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if (orientation == Orientation::HORIZONTAL)
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panningDistanceAccumulated += -lastUpdateDistance.x;
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else
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panningDistanceAccumulated += lastUpdateDistance.y;
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if (-panningDistanceAccumulated > panningDistanceSingle )
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{
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int scrollAmount = (-panningDistanceAccumulated) / panningDistanceSingle;
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scrollBy(-scrollAmount);
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panningDistanceAccumulated += scrollAmount * panningDistanceSingle;
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}
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if (panningDistanceAccumulated > panningDistanceSingle )
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{
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int scrollAmount = panningDistanceAccumulated / panningDistanceSingle;
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scrollBy(scrollAmount);
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panningDistanceAccumulated += -scrollAmount * panningDistanceSingle;
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}
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}
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int Scrollable::getScrollStep() const
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{
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return scrollStep;
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}
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Orientation Scrollable::getOrientation() const
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{
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return orientation;
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}
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void Scrollable::scrollNext()
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{
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scrollBy(+1);
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}
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void Scrollable::scrollPrev()
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{
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scrollBy(-1);
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}
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void Scrollable::setScrollStep(int to)
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{
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scrollStep = to;
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}
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void Scrollable::setPanningStep(int to)
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{
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panningDistanceSingle = to;
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}
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void Scrollable::setScrollingEnabled(bool on)
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{
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if (on)
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addUsedEvents(WHEEL | GESTURE);
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else
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removeUsedEvents(WHEEL | GESTURE);
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}
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