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103 lines
3.0 KiB
C++
103 lines
3.0 KiB
C++
/*
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* Slider.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 "Scrollable.h"
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#include "../../lib/FunctionList.h"
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class CButton;
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/// A typical slider which can be orientated horizontally/vertically.
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class CSlider : public Scrollable
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{
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//if vertical then left=up
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std::shared_ptr<CButton> left;
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std::shared_ptr<CButton> right;
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std::shared_ptr<CButton> slider;
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std::optional<Rect> scrollBounds;
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/// how many elements are visible simultaneously
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int capacity;
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/// number of highest position, or 0 if there is only one
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int positions;
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/// total amount of elements in the list
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int amount;
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/// topmost vislble (first active) element
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int value;
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CFunctionList<void(int)> moved;
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void updateSliderPos();
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public:
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enum EStyle
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{
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BROWN,
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BLUE
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};
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void block(bool on);
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/// If set, mouse scroll will only scroll slider when inside of this area
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void setScrollBounds(const Rect & bounds );
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void clearScrollBounds();
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/// Value modifiers
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void scrollTo(int value, bool callCallbacks = true);
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void scrollBy(int amount) override;
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void scrollToMin();
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void scrollToMax();
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/// Amount modifier
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void setAmount(int to);
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virtual void setValue(int to, bool callCallbacks = true);
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/// Accessors
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int getAmount() const;
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virtual int getValue() const;
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int getCapacity() const;
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void addCallback(std::function<void(int)> callback);
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bool receiveEvent(const Point & position, int eventType) const override;
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void keyPressed(EShortcut key) override;
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void clickPressed(const Point & cursorPosition) override;
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void mouseDragged(const Point & cursorPosition, const Point & lastUpdateDistance) override;
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void gesturePanning(const Point & initialPosition, const Point & currentPosition, const Point & lastUpdateDistance) override;
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void showAll(Canvas & to) override;
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using SliderMovingFunctor = std::function<void(int)>;
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/// @param position coordinates of slider
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/// @param length length of slider ribbon, including left/right buttons
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/// @param Moved function that will be called whenever slider moves
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/// @param Capacity maximal number of visible at once elements
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/// @param Amount total amount of elements, including not visible
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/// @param Value starting position
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CSlider(Point position, int length, const SliderMovingFunctor & Moved, int Capacity, int Amount,
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int Value, Orientation orientation, EStyle style = BROWN);
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~CSlider();
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};
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class SliderNonlinear : public CSlider
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{
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/// If non-empty then slider has non-linear values, e.g. if slider is at position 5 out of 10 then actual "value" is not 5, but 5th value in this vector
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std::vector<int> scaledValues;
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using CSlider::setAmount; // make private
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public:
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void setValue(int to, bool callCallbacks) override;
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int getValue() const override;
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SliderNonlinear(Point position, int length, const std::function<void(int)> & Moved, const std::vector<int> & values, int Value, Orientation orientation, EStyle style);
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};
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