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62 lines
1.7 KiB
C++
62 lines
1.7 KiB
C++
/*
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* Scrollable.h, 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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#pragma once
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#include "../gui/CIntObject.h"
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enum class Orientation
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{
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HORIZONTAL,
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VERTICAL
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};
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/// Simple class that provides scrolling functionality via either mouse wheel or touchscreen gesture
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class Scrollable : public CIntObject
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{
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/// how many elements will be scrolled via one wheel action, default = 1
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int scrollStep;
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/// How far player must move finger/mouse to move slider by 1 via gesture
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int panningDistanceSingle;
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/// How far have player moved finger/mouse via gesture so far.
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int panningDistanceAccumulated;
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Orientation orientation;
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protected:
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Scrollable(int used, Point position, Orientation orientation);
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void gesture(bool on, const Point & initialPosition, const Point & finalPosition) override;
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void wheelScrolled(int distance) override;
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void gesturePanning(const Point & initialPosition, const Point & currentPosition, const Point & lastUpdateDistance) override;
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int getScrollStep() const;
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Orientation getOrientation() const;
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public:
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/// Scrolls view by specified number of items
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virtual void scrollBy(int distance) = 0;
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/// Scrolls view by 1 item, identical to scrollBy(+1)
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virtual void scrollNext();
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/// Scrolls view by 1 item, identical to scrollBy(-1)
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virtual void scrollPrev();
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/// Controls how many items wil be scrolled via one click
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void setScrollStep(int to);
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/// Controls size of panning step needed to move list by 1 item
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void setPanningStep(int to);
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/// Enables or disabled scrolling
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void setScrollingEnabled(bool on);
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};
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