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import QtQuick 2.2
import QtQuick.Controls 1.4
import QtQuick.Controls.Styles 1.4 as Base
import QtQuick.Controls.Styles.Flat 1.0
import QtQuick.Extras.Private 1.0

Base.GaugeStyle {
    id: gaugeStyle

    readonly property int __totalValueBarWidth: Math.round(22 * FlatStyle.scaleFactor + __lineSpacing + __lineWidth)
    readonly property int __actualValueBarWidth: __totalValueBarWidth - __lineSpacing - __lineWidth
    readonly property int __lineWidth: FlatStyle.onePixel
    readonly property int __lineSpacing: Math.round(3 * FlatStyle.scaleFactor)

    background: Item {
        Rectangle {
            color: control.enabled ? FlatStyle.styleColor : FlatStyle.disabledColor
            opacity: control.enabled ? 1 : 0.2
            width: __lineWidth
            height: parent.height
            x: control.tickmarkAlignment === Qt.AlignLeft || control.tickmarkAlignment === Qt.AlignTop ? parent.width - width : 0
        }
    }

    valueBar: Item {
        implicitWidth: __totalValueBarWidth

        Rectangle {
            color: control.enabled ? FlatStyle.styleColor : FlatStyle.disabledColor
            opacity: control.enabled ? 1 : 0.2
            x: control.tickmarkAlignment === Qt.AlignRight || control.tickmarkAlignment === Qt.AlignBottom ? __lineWidth + __lineSpacing : 0
            implicitWidth: __actualValueBarWidth
            height: parent.height
        }
    }

    foreground: null

    tickmark: Item {
        id: tickmarkItem
        implicitWidth: Math.round(12 * FlatStyle.scaleFactor)
        implicitHeight: FlatStyle.onePixel

        Rectangle {
            x: control.tickmarkAlignment === Qt.AlignLeft || control.tickmarkAlignment === Qt.AlignTop
               ? parent.width + __actualValueBarWidth / 2 - width / 2
               : -__actualValueBarWidth / 2 - width / 2
            // Length of the tickmark is the same as the spacing between the tickmarks and labels.
            width: parent.width
            height: parent.height
            color: gaugeStyle.valuePosition > styleData.valuePosition + height ? FlatStyle.selectedTextColor : (control.enabled ? FlatStyle.styleColor : FlatStyle.disabledColor)
            opacity: gaugeStyle.valuePosition > styleData.valuePosition + height ? 0.5 : (control.enabled ? 1 : 0.2)
            visible: (styleData.index === 0 && gaugeStyle.valuePosition === 0) ||
                (styleData.index !== 0 && (gaugeStyle.valuePosition <= styleData.valuePosition || gaugeStyle.valuePosition > styleData.valuePosition + height))
        }
    }

    minorTickmark: Item {
        implicitWidth: Math.round(6 * FlatStyle.scaleFactor)
        implicitHeight: FlatStyle.onePixel

        Rectangle {
            x: control.tickmarkAlignment === Qt.AlignLeft || control.tickmarkAlignment === Qt.AlignTop
               ? parent.width + __actualValueBarWidth / 2 - width / 2
               : -__actualValueBarWidth / 2 - width / 2
            width: parent.width
            height: parent.height
            color: control.enabled ? FlatStyle.styleColor : FlatStyle.disabledColor
            opacity: control.enabled ? 1 : 0.2
            visible: gaugeStyle.valuePosition <= styleData.valuePosition
        }
    }

    tickmarkLabel: Item {
        implicitWidth: textLabel.implicitWidth
        implicitHeight: textLabel.implicitHeight

        Label {
            id: textLabel
            text: control.formatValue(styleData.value)
            font: control.font
            color: control.enabled ? FlatStyle.defaultTextColor : FlatStyle.disabledColor
            opacity: control.enabled ? 1 : FlatStyle.disabledOpacity
            renderType: FlatStyle.__renderType
            Connections {
                target: control
                // Setting an anchor to undefined leaves it in the position it was in last.
                // We don't want that, as we want the label's y pos to be at zero when it's not anchored.
                // Using a binding here whose when property is true when control.orientation === Qt.Horizontal
                // doesn't work.
                function onOrientationChanged() { textLabel.y = 0 }
            }
            anchors.baseline: control.orientation === Qt.Vertical ? parent.verticalCenter : undefined
        }
    }
}