import QtQuick 2.0

import "qrc:/theme"
import "qrc:/const"

Item {
	id: control

	property bool centerButDown: centerBut.down
	property bool leftButDown
	property bool rightButDown
	property bool topButDown
	property bool bottomButDown

	width: 2 * (Const.radiusLong + Const.margin)
	height: 2 * (Const.radiusLong + Const.margin)

	SegmentButton {
		id: topBut
		angle: 45
		x: Const.margin
	}

	SegmentButton {
		id: bottomBut
		angle: -135
		x: Const.margin
		y: 2 * Const.margin
	}

	SegmentButton {
		id: leftBut
		angle: -45
		y: Const.margin
	}

	SegmentButton {
		id: rightBut
		angle: 135
		x: 2 * Const.margin
		y: Const.margin
	}

	Rectangle {
		color: "transparent"
		anchors.fill: parent
		MouseArea {
			id: mouseArea
			anchors.fill: parent
			hoverEnabled: true
			onPressed: {
				if(beInCenter()) {
					// inside
				} else if (isOutside()) {
					// outside
				} else {
					if(beInNorthOrWest()) {
						if(beInNorthOrEast()) {
							// top key
							topButPressed()
						} else {
							// left key
							leftButPressed()
						}
					} else {
						if(beInNorthOrEast()) {
							// right key
							rightButPressed()
						} else {
							// bottom key
							bottomButPressed()
						}
					}
				}
			}

			onReleased: {
				topButReleased()
				leftButReleased()
				rightButReleased()
				bottomButReleased()
			}
			onMouseXChanged: {
				if(!mouseArea.pressed) {
					if(beInCenter()) {
						// inside
						topButExit()
						leftButExit()
						rightButExit()
						bottomButExit()
					} else if (isOutside()) {
						// outside
						topButExit()
						leftButExit()
						rightButExit()
						bottomButExit()
					} else {
						if(beInNorthOrWest()) {
							if(beInNorthOrEast()) {
								// top key
								topButHover()
								leftButExit()
								rightButExit()
								bottomButExit()
							} else {
								// left key
								leftButHover()
								topButExit()
								rightButExit()
								bottomButExit()
							}
						} else {
							if(beInNorthOrEast()) {
								// right key
								rightButHover()
								topButExit()
								leftButExit()
								bottomButExit()
							} else {
								// bottom key
								bottomButHover()
								topButExit()
								leftButExit()
								rightButExit()
							}
						}
					}
				}
			}

			onExited: {
				topButExit()
				leftButExit()
				rightButExit()
				bottomButExit()
			}

			function beInNorthOrWest() {
				var verDist = (Const.radiusLong + Const.margin) - mouseY
				var horDist = mouseX - (Const.radiusLong + Const.margin)
				var inNorthorWest = (verDist > horDist)
				return inNorthorWest
			}

			function beInNorthOrEast() {
				var verDist = (Const.radiusLong + Const.margin) - mouseY
				var horDist = mouseX - (Const.radiusLong + Const.margin)
				var inNorthorEast = (verDist > - horDist)
				return inNorthorEast
			}

			function beInCenter() {
				var verLength = (mouseY - (Const.radiusLong + Const.margin)) ** 2
				var horLength = (mouseX - (Const.radiusLong + Const.margin)) ** 2
				var inCenter = (verLength + horLength < ((Const.radiusShort + Const.margin) ** 2))
				return inCenter
			}

			function isOutside() {
				var verLength = (mouseY - (Const.radiusLong + Const.margin)) ** 2
				var horLength = (mouseX - (Const.radiusLong + Const.margin)) ** 2
				var isOut = (verLength + horLength > ((Const.radiusLong + Const.margin) ** 2))
				return isOut
			}
		}
	}


	NeuButton {
		id: centerBut
		width: 2 * (Const.radiusShort - Const.margin)
		height: 2 * (Const.radiusShort - Const.margin)
		anchors.centerIn: parent
	}

	/***********************************/
	function leftButPressed() {
		leftButDown = true
		leftBut.state = "Pressed"
		leftBut.pressed()
	}

	function leftButReleased() {
		leftButDown = false
		leftBut.released()
		leftBut.state = ""
	}

	function leftButHover() {
		leftBut.state = "Hovering"
	}

	function leftButExit() {
		leftBut.state = ""
	}

	/***********************************/
	function rightButPressed() {
		rightButDown = true
		rightBut.state = "Pressed"
		rightBut.pressed()
	}

	function rightButReleased() {
		rightButDown = false
		rightBut.released()
		rightBut.state = ""
	}

	function rightButHover() {
		rightBut.state = "Hovering"
	}

	function rightButExit() {
		rightBut.state = ""
	}

	/***********************************/
	function topButPressed() {
		topButDown = true
		topBut.state = "Pressed"
		topBut.pressed()
	}

	function topButReleased() {
		topButDown = false
		topBut.released()
		topBut.state = ""
	}

	function topButHover() {
		topBut.state = "Hovering"
	}

	function topButExit() {
		topBut.state = ""
	}

	/***********************************/
	function bottomButPressed() {
		bottomButDown = true
		bottomBut.state = "Pressed"
		bottomBut.pressed()
	}

	function bottomButReleased() {
		bottomButDown = false
		bottomBut.released()
		bottomBut.state = ""
	}

	function bottomButHover() {
		bottomBut.state = "Hovering"
	}

	function bottomButExit() {
		bottomBut.state = ""
	}
}