/*
  Copyright (c) 2020 Alex Diener
  
  This software is provided 'as-is', without any express or implied
  warranty. In no event will the authors be held liable for any damages
  arising from the use of this software.
  
  Permission is granted to anyone to use this software for any purpose,
  including commercial applications, and to alter it and redistribute it
  freely, subject to the following restrictions:
  
  1. The origin of this software must not be misrepresented; you must not
     claim that you wrote the original software. If you use this software
     in a product, an acknowledgment in the product documentation would be
     appreciated but is not required.
  2. Altered source versions must be plainly marked as such, and must not be
     misrepresented as being the original software.
  3. This notice may not be removed or altered from any source distribution.
  
  Alex Diener alex@ludobloom.com
*/

#include "gamemath/Scalar.h"
#include "shell/ShellKeyCodes.h"
#include "uitoolkit/UISlider.h"
#include "uitoolkit/UIToolkitAppearance.h"
#include "uitoolkit/UIToolkitCursor.h"
#include "uitoolkit/UIToolkitDrawing.h"
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define stemobject_implementation UISlider
stemobject_vtable_begin();
stemobject_vtable_entry(dispose);
stemobject_vtable_entry(hitTest);
stemobject_vtable_entry(mouseDown);
stemobject_vtable_entry(mouseUp);
stemobject_vtable_entry(mouseMoved);
stemobject_vtable_entry(mouseDragged);
stemobject_vtable_entry(scrollWheel);
stemobject_vtable_entry(keyModifiersChanged);
stemobject_vtable_entry(menuActionDown);
stemobject_vtable_entry(menuActionUp);
stemobject_vtable_entry(menuDirectionDown);
stemobject_vtable_entry(menuDirectionUp);
stemobject_vtable_entry(setFocusedElement);
stemobject_vtable_entry(acceptsFocus);
stemobject_vtable_entry(getBounds);
stemobject_vtable_entry(getFocusBounds);
stemobject_vtable_entry(draw);
stemobject_vtable_entry(needsRedraw);
stemobject_vtable_entry(setValue);
stemobject_vtable_entry(getRelativeValue);
stemobject_vtable_entry(setRelativeValue);
stemobject_vtable_entry(getTrackSize);
stemobject_vtable_entry(getHandleSize);
stemobject_vtable_entry(getTrackBounds);
stemobject_vtable_entry(getHandleBounds);
stemobject_vtable_entry(setRange);
stemobject_vtable_entry(drawTrack);
stemobject_vtable_entry(drawHandle);
stemobject_vtable_end();

UISlider * UISlider_create(float minValue, float maxValue, float initialValue, Vector2f position, Vector2f relativeOrigin, UISlider_options options, unsigned int pixelLength, UISliderCallback changeCallback, UISliderCallback changeCompleteCallback, void * callbackContext, UIAppearance appearance) {
	stemobject_create_implementation(init, minValue, maxValue, initialValue, position, relativeOrigin, options, pixelLength, changeCallback, changeCompleteCallback, callbackContext, appearance)
}

bool UISlider_init(UISlider * self, float minValue, float maxValue, float initialValue, Vector2f position, Vector2f relativeOrigin, UISlider_options options, unsigned int pixelLength, UISliderCallback changeCallback, UISliderCallback changeCompleteCallback, void * callbackContext, UIAppearance appearance) {
	call_super(init, self, position, relativeOrigin, appearance);
	assert(maxValue > minValue);
	self->minValue = minValue;
	self->maxValue = maxValue;
	self->defaultValue = initialValue;
	if (!(options & SLIDER_OPTION_ALLOW_UNCLAMPED_DRAG)) {
		initialValue = fminf(fmaxf(initialValue, minValue), maxValue);
	}
	self->value = initialValue;
	self->options = options;
	self->secondsToSlideFromMinToMaxAtFullSpeed = 1.0;
	self->secondsToAccelerateToFullSpeed = 0.125f;
	self->preciseDragMultiplier = 0.1f;
	self->pixelLength = pixelLength;
	self->lastModifiers = 0;
	self->changeCallback = changeCallback;
	self->changeCompleteCallback = changeCompleteCallback;
	self->callbackContext = callbackContext;
	self->protected_ivar(rollover) = false;
	self->protected_ivar(dragInProgress) = false;
	self->protected_ivar(menuActionDown) = false;
	self->protected_ivar(focusLocked) = false;
	self->protected_ivar(moveInput) = MoveInputState_allNeutral;
	self->protected_ivar(menuDirectionRangeClamped) = true;
	return true;
}

void UISlider_dispose(UISlider * self) {
	call_super(dispose, self);
}

bool UISlider_hitTest(UISlider * self, float x, float y, UIHitTestType type, int * outPriority, bool * outForwardNext) {
	if (call_super_virtual(hitTest, self, x, y, type, outPriority, outForwardNext)) {
		if (type == HIT_TEST_SCROLL_WHEEL) {
			*outPriority -= 10;
		}
		return true;
	}
	return false;
}

void UISlider_setValue(UISlider * self, float value) {
	if (self->options & SLIDER_OPTION_ALLOW_UNCLAMPED_DRAG) {
		self->value = value;
	} else {
		self->value = fminf(fmaxf(value, self->minValue), self->maxValue);
	}
	self->dirty = true;
}

float UISlider_getRelativeValue(UISlider * self) {
	return (self->value - self->minValue) / (self->maxValue - self->minValue);
}

void UISlider_setRelativeValue(UISlider * self, float relativeValue) {
	self->value = self->minValue + (self->maxValue - self->minValue) * relativeValue;
	if (self->options & SLIDER_OPTION_SNAP_TO_INTEGER) {
		self->value = roundpositivef(self->value);
	}
	if (!(self->options & SLIDER_OPTION_ALLOW_UNCLAMPED_DRAG)) {
		self->value = fminf(fmaxf(self->value, self->minValue), self->maxValue);
	}
	self->dirty = true;
}

void UISlider_setRange(UISlider * self, float minValue, float maxValue) {
	self->minValue = minValue;
	self->maxValue = maxValue;
	if (!(self->options & SLIDER_OPTION_ALLOW_UNCLAMPED_DRAG)) {
		self->value = fminf(fmaxf(self->value, self->minValue), self->maxValue);
	}
}

Vector2f UISlider_getTrackSize(UISlider * self) {
	return getAppearanceAtlasEntry(self->appearance, UISlider_sliderTrack).size;
}

Vector2f UISlider_getHandleSize(UISlider * self) {
	return getAppearanceAtlasEntry(self->appearance, UISlider_sliderHandle).size;
}

Rect4f UISlider_getTrackBounds(UISlider * self) {
	Rect4f trackBounds = RECT4f_EMPTY;
	Vector2f sliderHandleSize = call_virtual(getHandleSize, self);
	Vector2f sliderTrackSize = call_virtual(getTrackSize, self);
	if (self->options & SLIDER_OPTION_VERTICAL) {
		trackBounds.xMin = roundpositivef(self->position.x - sliderHandleSize.y * self->relativeOrigin.x + (sliderHandleSize.y - sliderTrackSize.x) / 2);
		trackBounds.yMin = roundpositivef(self->position.y - self->pixelLength * self->relativeOrigin.y);
		trackBounds.xMax = trackBounds.xMin + sliderTrackSize.x;
		trackBounds.yMax = trackBounds.yMin + self->pixelLength;
	} else {
		trackBounds.xMin = roundpositivef(self->position.x - self->pixelLength * self->relativeOrigin.x);
		trackBounds.yMin = roundpositivef(self->position.y - sliderHandleSize.y * self->relativeOrigin.y + (sliderHandleSize.y - sliderTrackSize.y) / 2);
		trackBounds.xMax = trackBounds.xMin + self->pixelLength;
		trackBounds.yMax = trackBounds.yMin + sliderTrackSize.y;
	}
	return trackBounds;
}

Rect4f UISlider_getHandleBounds(UISlider * self, bool rounded, bool clamped) {
	Rect4f handleBounds = RECT4f_EMPTY;
	float relativeValue = UISlider_getRelativeValue(self);
	if (clamped) {
		relativeValue = fminf(fmaxf(relativeValue, 0.0f), 1.0f);
	}
	
	Vector2f sliderHandleSize = call_virtual(getHandleSize, self);
	if (self->options & SLIDER_OPTION_VERTICAL) {
		handleBounds.xMin = self->position.x - sliderHandleSize.y * self->relativeOrigin.x;
		handleBounds.yMin = self->position.y - self->pixelLength * self->relativeOrigin.y + self->pixelLength * relativeValue - sliderHandleSize.x / 2;
		if (rounded) {
			handleBounds.xMin = roundpositivef(handleBounds.xMin);
			handleBounds.yMin = roundpositivef(handleBounds.yMin);
		}
		handleBounds.xMax = handleBounds.xMin + sliderHandleSize.y;
		handleBounds.yMax = handleBounds.yMin + sliderHandleSize.x;
		
	} else {
		handleBounds.xMin = self->position.x - self->pixelLength * self->relativeOrigin.x + self->pixelLength * relativeValue - sliderHandleSize.x / 2;
		handleBounds.yMin = self->position.y - sliderHandleSize.y * self->relativeOrigin.y;
		if (rounded) {
			handleBounds.xMin = roundpositivef(handleBounds.xMin);
			handleBounds.yMin = roundpositivef(handleBounds.yMin);
		}
		handleBounds.xMax = handleBounds.xMin + sliderHandleSize.x;
		handleBounds.yMax = handleBounds.yMin + sliderHandleSize.y;
	}
	return handleBounds;
}

UIEventResponse UISlider_mouseDown(UISlider * self, unsigned int buttonNumber, unsigned int buttonMask, float x, float y, unsigned int modifiers, bool isFinalTarget, double referenceTime) {
	if (!self->visible) {
		return RESPONSE_UNHANDLED;
	}
	if (buttonNumber == 0) {
		if ((self->options & SLIDER_OPTION_RESET_ON_CONTROL_CLICK) && (modifiers & MODIFIER_CONTROL_BIT) && !(modifiers & MODIFIER_SHIFT_BIT)) {
			self->value = self->defaultValue;
			if (!(self->options & SLIDER_OPTION_ALLOW_UNCLAMPED_DRAG)) {
				self->value = fminf(fmaxf(self->value, self->minValue), self->maxValue);
			}
			self->dirty = true;
			if (self->changeCallback != NULL) {
				self->changeCallback(self, self->value, 0, referenceTime, self->callbackContext);
			}
			if (self->changeCompleteCallback != NULL) {
				self->changeCompleteCallback(self, self->value, 0, referenceTime, self->callbackContext);
			}
			return RESPONSE_HANDLED;
		}
		
		Rect4f handleBounds = call_virtual(getHandleBounds, self, false, true);
		self->protected_ivar(dragInProgress) = true;
		self->protected_ivar(lastDragPosition) = VECTOR2f(x, y);
		self->dirty = true;
		if (modifiers & MODIFIER_ALT_BIT) {
			UIToolkit_pushMouseDeltaMode();
		}
		if (Rect4f_containsVector2f(handleBounds, VECTOR2f(x, y))) {
			if ((self->options & SLIDER_OPTION_ALLOW_UNCLAMPED_DRAG) && (modifiers & MODIFIER_ALT_BIT)) {
				handleBounds = call_virtual(getHandleBounds, self, false, false);
			}
			self->protected_ivar(dragOffset) = VECTOR2f(x - (handleBounds.xMin + (handleBounds.xMax - handleBounds.xMin) / 2), y - (handleBounds.yMin + (handleBounds.yMax - handleBounds.yMin) / 2));
			
		} else {
			float lastValue = self->value;
			self->protected_ivar(dragOffset) = VECTOR2f(0.0f, 0.0f);
			if (self->options & SLIDER_OPTION_VERTICAL) {
				UISlider_setRelativeValue(self, (y - (self->position.y - self->pixelLength * self->relativeOrigin.y)) / self->pixelLength);
			} else {
				UISlider_setRelativeValue(self, (x - (self->position.x - self->pixelLength * self->relativeOrigin.x)) / self->pixelLength);
			}
			if (self->value != lastValue && self->changeCallback != NULL) {
				self->changeCallback(self, self->value, modifiers, referenceTime, self->callbackContext);
			}
		}
		return RESPONSE_HANDLED;
	}
	return RESPONSE_UNHANDLED;
}

bool UISlider_mouseUp(UISlider * self, unsigned int buttonNumber, unsigned int buttonMask, float x, float y, unsigned int modifiers, double referenceTime) {
	if (self->protected_ivar(dragInProgress)) {
		self->protected_ivar(dragInProgress) = false;
		if (modifiers & MODIFIER_ALT_BIT) {
			UIToolkit_popMouseDeltaMode();
		}
		self->dirty = true;
		if (self->changeCompleteCallback != NULL) {
			self->changeCompleteCallback(self, self->value, modifiers, referenceTime, self->callbackContext);
		}
		return true;
	}
	return false;
}

bool UISlider_mouseMoved(UISlider * self, float x, float y, float deltaX, float deltaY, unsigned int modifiers, double referenceTime) {
	bool wasRolledOver = self->protected_ivar(rollover);
	self->protected_ivar(rollover) = Rect4f_containsVector2f(call_virtual(getHandleBounds, self, true, true), VECTOR2f(x, y));
	if (self->protected_ivar(rollover) != wasRolledOver) {
		self->dirty = true;
		return true;
	}
	return false;
}

static bool handleDrag(UISlider * self, float x, float y, unsigned int modifiers) {
	float lastValue = self->value;
	float newRelativeValue = 0.0f;
	if (self->options & SLIDER_OPTION_VERTICAL) {
		newRelativeValue = (y - self->protected_ivar(dragOffset).y - (self->position.y - self->pixelLength * self->relativeOrigin.y)) / self->pixelLength;
	} else {
		newRelativeValue = (x - self->protected_ivar(dragOffset).x - (self->position.x - self->pixelLength * self->relativeOrigin.x)) / self->pixelLength;
	}
	if (!(self->options & SLIDER_OPTION_ALLOW_UNCLAMPED_DRAG) || !(modifiers & MODIFIER_ALT_BIT)) {
		newRelativeValue = fminf(fmaxf(newRelativeValue, 0.0f), 1.0f);
	}
	UISlider_setRelativeValue(self, newRelativeValue);
	return lastValue != self->value;
}

bool UISlider_mouseDragged(UISlider * self, unsigned int buttonMask, float x, float y, float deltaX, float deltaY, unsigned int modifiers, double referenceTime) {
	if ((buttonMask & 0x1) && self->protected_ivar(dragInProgress)) {
		if ((self->options & SLIDER_OPTION_ALLOW_PRECISE_DRAG) && (modifiers & MODIFIER_SHIFT_BIT)) {
			float multiplier = self->preciseDragMultiplier;
			if (modifiers & MODIFIER_CONTROL_BIT) {
				multiplier *= multiplier;
			}
			self->protected_ivar(dragOffset).x += deltaX * (1.0f - multiplier);
			self->protected_ivar(dragOffset).y -= deltaY * (1.0f - multiplier);
		}
		if (modifiers & MODIFIER_ALT_BIT) {
			self->protected_ivar(lastDragPosition).x += deltaX;
			self->protected_ivar(lastDragPosition).y -= deltaY;
		} else {
			self->protected_ivar(lastDragPosition) = VECTOR2f(x, y);
		}
		if (handleDrag(self, self->protected_ivar(lastDragPosition).x, self->protected_ivar(lastDragPosition).y, modifiers)) {
			self->dirty = true;
			if (self->changeCallback != NULL) {
				self->changeCallback(self, self->value, modifiers, referenceTime, self->callbackContext);
			}
			return true;
		}
	}
	return false;
}

UIEventResponse UISlider_scrollWheel(UISlider * self, float x, float y, int deltaX, int deltaY, unsigned int modifiers, bool isFinalTarget, double referenceTime) {
	if (deltaY != 0 && !self->protected_ivar(dragInProgress)) {
		float valueChange = -deltaY;
		if (!(self->options & SLIDER_OPTION_SNAP_TO_INTEGER)) {
			valueChange *= (self->maxValue - self->minValue) * 0.125f / self->secondsToSlideFromMinToMaxAtFullSpeed;
			if ((self->options & SLIDER_OPTION_ALLOW_PRECISE_DRAG) && (modifiers & MODIFIER_SHIFT_BIT)) {
				valueChange *= self->preciseDragMultiplier;
				if (modifiers & MODIFIER_CONTROL_BIT) {
					valueChange *= self->preciseDragMultiplier;
				}
			}
		}
		float newValue = self->value + valueChange;
		if (!(self->options & SLIDER_OPTION_ALLOW_UNCLAMPED_DRAG) || !(modifiers & MODIFIER_ALT_BIT)) {
			newValue = fminf(fmaxf(newValue, self->minValue), self->maxValue);
		}
		if (newValue != self->value) {
			UISlider_setValue(self, newValue);
			self->dirty = true;
			if (self->changeCallback != NULL) {
				self->changeCallback(self, self->value, modifiers, referenceTime, self->callbackContext);
			}
			return true;
		}
		return RESPONSE_HANDLED;
	}
	return RESPONSE_UNHANDLED;
}

bool UISlider_keyModifiersChanged(UISlider * self, unsigned int modifiers, unsigned int lastModifiers, double referenceTime) {
	unsigned int lastLastModifiers = self->lastModifiers;
	self->lastModifiers = modifiers;
	if (self->protected_ivar(dragInProgress)) {
		if ((modifiers & MODIFIER_ALT_BIT) && !(lastModifiers & MODIFIER_ALT_BIT)) {
			UIToolkit_pushMouseDeltaMode();
		} else if (!(modifiers & MODIFIER_ALT_BIT) && (lastModifiers & MODIFIER_ALT_BIT)) {
			UIToolkit_popMouseDeltaMode();
		}
		if (handleDrag(self, self->protected_ivar(lastDragPosition).x, self->protected_ivar(lastDragPosition).y, modifiers) || modifiers != lastLastModifiers) {
			self->dirty = true;
			if (self->changeCallback != NULL) {
				self->changeCallback(self, self->value, modifiers, referenceTime, self->callbackContext);
			}
			return true;
		}
	}
	return false;
}

bool UISlider_menuActionDown(UISlider * self, unsigned int actionNumber, bool isRepeat, double referenceTime) {
	if (actionNumber == 0 && !isRepeat) {
		if (self->protected_ivar(focusLocked)) {
			self->protected_ivar(focusLocked) = false;
			
		} else {
			self->protected_ivar(menuActionDown) = true;
			self->protected_ivar(focusLocked) = true;
			self->protected_ivar(moveInput) = MoveInputState_allNeutral;
			self->protected_ivar(moveVelocity) = 0.0f;
			self->protected_ivar(changesMadeByMenuDirection) = false;
		}
		self->dirty = true;
		return true;
	}
	if (actionNumber == 1 && self->protected_ivar(focusLocked)) {
		self->protected_ivar(focusLocked) = false;
		self->protected_ivar(menuActionDown) = false;
		self->dirty = true;
		return true;
	}
	if (actionNumber == 2) {
		self->protected_ivar(menuDirectionRangeClamped) = !(self->options & SLIDER_OPTION_ALLOW_UNCLAMPED_DRAG);
	}
	return false;
}

bool UISlider_menuActionUp(UISlider * self, unsigned int actionNumber, double referenceTime) {
	if (actionNumber == 0) {
		self->protected_ivar(menuActionDown) = false;
		self->dirty = true;
		if (self->protected_ivar(changesMadeByMenuDirection) && self->changeCompleteCallback != NULL) {
			self->changeCompleteCallback(self, self->value, self->lastModifiers, referenceTime, self->callbackContext);
		}
		return true;
	}
	if (actionNumber == 2) {
		self->protected_ivar(menuDirectionRangeClamped) = true;
	}
	return false;
}

bool UISlider_menuDirectionDown(UISlider * self, UINavigationDirection direction, bool isRepeat, double referenceTime) {
	if (self->protected_ivar(menuActionDown) || self->protected_ivar(focusLocked)) {
		float lastValue = self->value;
		if ((direction == UI_LEFT && !(self->options & SLIDER_OPTION_VERTICAL)) || (direction == UI_DOWN && (self->options & SLIDER_OPTION_VERTICAL))) {
			if (self->protected_ivar(menuActionDown)) {
				self->protected_ivar(focusLocked) = false;
			}
			if (self->options & SLIDER_OPTION_SNAP_TO_INTEGER) {
				float newValue = self->value - 1;
				if (self->protected_ivar(menuDirectionRangeClamped)) {
					newValue = fmaxf(fminf(newValue, self->maxValue), self->minValue);
				}
				UISlider_setValue(self, newValue);
			} else {
				MoveInput_start(&self->protected_ivar(moveInput), 0, MOVE_DIRECTION_NEGATIVE);
				return true;
			}
			
		} else if ((direction == UI_RIGHT && !(self->options & SLIDER_OPTION_VERTICAL)) || (direction == UI_UP && (self->options & SLIDER_OPTION_VERTICAL))) {
			if (self->protected_ivar(menuActionDown)) {
				self->protected_ivar(focusLocked) = false;
			}
			if (self->options & SLIDER_OPTION_SNAP_TO_INTEGER) {
				float newValue = self->value + 1;
				if (self->protected_ivar(menuDirectionRangeClamped)) {
					newValue = fmaxf(fminf(newValue, self->maxValue), self->minValue);
				}
				UISlider_setValue(self, newValue);
			} else {
				MoveInput_start(&self->protected_ivar(moveInput), 0, MOVE_DIRECTION_POSITIVE);
				return true;
			}
		}
		if (self->value != lastValue) {
			self->dirty = true;
			self->protected_ivar(changesMadeByMenuDirection) = true;
			if (self->changeCallback != NULL) {
				self->changeCallback(self, self->value, self->lastModifiers, referenceTime, self->callbackContext);
			}
			return true;
		}
		return false;
	}
	return call_super(menuDirectionDown, self, direction, isRepeat, referenceTime);
}

bool UISlider_menuDirectionUp(UISlider * self, UINavigationDirection direction, double referenceTime) {
	if (self->protected_ivar(menuActionDown) || self->protected_ivar(focusLocked)) {
		if ((direction == UI_LEFT && !(self->options & SLIDER_OPTION_VERTICAL)) || (direction == UI_DOWN && (self->options & SLIDER_OPTION_VERTICAL))) {
			if (!(self->options & SLIDER_OPTION_SNAP_TO_INTEGER)) {
				MoveInput_stop(&self->protected_ivar(moveInput), 0, MOVE_DIRECTION_NEGATIVE);
				self->dirty = true;
				return true;
			}
			
		} else if ((direction == UI_RIGHT && !(self->options & SLIDER_OPTION_VERTICAL)) || (direction == UI_UP && (self->options & SLIDER_OPTION_VERTICAL))) {
			if (!(self->options & SLIDER_OPTION_SNAP_TO_INTEGER)) {
				MoveInput_stop(&self->protected_ivar(moveInput), 0, MOVE_DIRECTION_POSITIVE);
				self->dirty = true;
				return true;
			}
		}
		return false;
	}
	return call_super(menuDirectionUp, self, direction, referenceTime);
}

bool UISlider_setFocusedElement(UISlider * self, compat_type(UIElement *) element, compat_type(UIElement *) fromElement, UINavigationDirection directionFromElement) {
	if (element == self) {
		self->protected_ivar(focusLocked) = false;
	}
	return call_super(setFocusedElement, self, element, fromElement, directionFromElement);
}

bool UISlider_acceptsFocus(UISlider * self) {
	return self->visible;
}

Rect4f UISlider_getBounds(UISlider * self) {
	Rect4f result = RECT4f_EMPTY;
	
	Vector2f sliderHandleSize = call_virtual(getHandleSize, self);
	if (self->options & SLIDER_OPTION_VERTICAL) {
		result.xMin = roundpositivef(self->position.x - sliderHandleSize.y * self->relativeOrigin.x);
		result.yMin = roundpositivef(self->position.y - self->pixelLength * self->relativeOrigin.y);
		result.xMax = result.xMin + sliderHandleSize.y;
		result.yMax = result.yMin + self->pixelLength;
		result.yMin -= sliderHandleSize.x / 2;
		result.yMax += sliderHandleSize.x / 2;
		
	} else {
		result.xMin = roundpositivef(self->position.x - self->pixelLength * self->relativeOrigin.x);
		result.yMin = roundpositivef(self->position.y - sliderHandleSize.y * self->relativeOrigin.y);
		result.xMax = result.xMin + self->pixelLength;
		result.yMax = result.yMin + sliderHandleSize.y;
		result.xMin -= sliderHandleSize.x / 2;
		result.xMax += sliderHandleSize.x / 2;
	}
	return result;
}

Rect4f UISlider_getFocusBounds(UISlider * self) {
	if (self->protected_ivar(focusLocked) || self->protected_ivar(menuActionDown)) {
		return UIElement_localToRootRect(self, call_virtual(getHandleBounds, self, true, true));
	}
	return call_super(getFocusBounds, self);
}

void UISlider_draw(UISlider * self, Vector2f offset, UIDrawingInterface * drawingInterface, VertexIO * vertexIO) {
	call_super(draw, self, offset, drawingInterface, vertexIO);
	
	if (!self->visible) {
		return;
	}
	
	if (vertexIO->vertices != NULL && (self->protected_ivar(menuActionDown) || self->protected_ivar(focusLocked)) && !(self->options & SLIDER_OPTION_SNAP_TO_INTEGER)) {
		MoveInput_direction moveDirection = MoveInput_mostRecentDirection(self->protected_ivar(moveInput), 0);
		if (moveDirection == MOVE_DIRECTION_NEUTRAL) {
			self->protected_ivar(moveVelocity) = 0.0f;
		} else {
			float lastValue = self->value;
			float position = UISlider_getRelativeValue(self);
			if ((moveDirection > 0) != (self->protected_ivar(moveVelocity) > 0.0f)) {
				self->protected_ivar(moveVelocity) = 0.0f;
			}
			acceleratef(&self->protected_ivar(moveVelocity),
			            &position,
			            1.0f / self->secondsToAccelerateToFullSpeed,
			            1.0f / self->secondsToSlideFromMinToMaxAtFullSpeed * moveDirection,
			            vertexIO->deltaTime);
			if (self->protected_ivar(menuDirectionRangeClamped)) {
				position = fmaxf(fminf(position, 1.0f), 0.0f);
			}
			UISlider_setRelativeValue(self, position);
			if (self->value != lastValue) {
				self->protected_ivar(changesMadeByMenuDirection) = true;
				if (self->changeCallback != NULL) {
					self->changeCallback(self, self->value, self->lastModifiers, vertexIO->referenceTime, self->callbackContext);
				}
			}
		}
	}
	
	call_virtual(drawTrack, self, offset, drawingInterface, vertexIO);
	call_virtual(drawHandle, self, offset, drawingInterface, vertexIO);
}

bool UISlider_needsRedraw(UISlider * self) {
	if ((self->protected_ivar(menuActionDown) || self->protected_ivar(focusLocked)) && MoveInput_mostRecentDirection(self->protected_ivar(moveInput), 0) != MOVE_DIRECTION_NEUTRAL) {
		return true;
	}
	return call_super(needsRedraw, self);
}

void UISlider_drawTrack(UISlider * self, Vector2f offset, UIDrawingInterface * drawingInterface, VertexIO * vertexIO) {
	call_virtual(drawSlicedQuad3x3, drawingInterface, Rect4f_offset(call_virtual2(getTrackBounds, self), offset),
	                                                  UIAtlasEntry_boundsForScale(getAppearanceAtlasEntry(self->appearance, UISlider_sliderTrack), drawingInterface->scaleFactor),
	                                                  getAppearanceSliceGrid3x3(self->appearance, UISlider_trackSlices),
	                                                  COLOR4f(1.0f, 1.0f, 1.0f, 1.0f),
	                                                  vertexIO);
}

void UISlider_drawHandle(UISlider * self, Vector2f offset, UIDrawingInterface * drawingInterface, VertexIO * vertexIO) {
	bool hasFocus = call_virtual(getFocusedElement, call_super(getTopParent, self)) == (UIElement *) self;
	Rect4f handleBounds = Rect4f_offset(call_virtual(getHandleBounds, self, true, true), offset);
	
	UIAtlasEntry atlasEntry;
	bool outOfRange = self->value < self->minValue || self->value > self->maxValue;
	if (self->protected_ivar(dragInProgress) || (hasFocus && (self->protected_ivar(focusLocked) || self->protected_ivar(menuActionDown)))) {
		if (outOfRange) {
			atlasEntry = getAppearanceAtlasEntry(self->appearance, UISlider_sliderHandleHighlightOutOfRange);
		} else {
			atlasEntry = getAppearanceAtlasEntry(self->appearance, UISlider_sliderHandleHighlight);
		}
	} else if (self->protected_ivar(rollover)) {
		if (outOfRange) {
			atlasEntry = getAppearanceAtlasEntry(self->appearance, UISlider_sliderHandleRolloverOutOfRange);
		} else {
			atlasEntry = getAppearanceAtlasEntry(self->appearance, UISlider_sliderHandleRollover);
		}
	} else {
		if (outOfRange) {
			atlasEntry = getAppearanceAtlasEntry(self->appearance, UISlider_sliderHandleOutOfRange);
		} else {
			atlasEntry = getAppearanceAtlasEntry(self->appearance, UISlider_sliderHandle);
		}
	}
	call_virtual(drawQuadWithTransform, drawingInterface, handleBounds,
	                                                      UIAtlasEntry_boundsForScale(atlasEntry, drawingInterface->scaleFactor),
	                                                      (self->options & SLIDER_OPTION_VERTICAL) ? QUAD_TRANSFORM_ROTATE_CCW | QUAD_TRANSFORM_FLIP_X : 0,
	                                                      COLOR4f(1.0f, 1.0f, 1.0f, 1.0f),
	                                                      vertexIO);
}