// Copyright (c) 2022 Ultimaker B.V.
// Cura is released under the terms of the LGPLv3 or higher.

import QtQuick 2.2
import QtQuick.Controls 2.15

import UM 1.5 as UM
import Cura 1.5 as Cura

// This component extends the funtionality of QtControls 2.x Spinboxes to
// - be able to contain fractional values
// - hava a "prefix" and a "suffix". A validator is added that recognizes this pre-, suf-fix combo. When adding a custom
//    validator the pre-, suf-fix should be added (e.g. new RegExp("^" + prefix + \regex\ + suffix + "$")

Item
{
    id: base

    property string prefix: ""
    property string suffix: ""
    property int decimals: 0
    property real stepSize: 1
    property real value: 0
    property real from: 0
    property real to: 99

    property alias wrap: spinBox.wrap

    property bool editable: true

    property var validator: RegExpValidator
    {
        regExp: new RegExp("^" + prefix + "([0-9]+[.|,]?[0-9]*)?" + suffix + "$")
    }

    signal editingFinished()
    implicitWidth: spinBox.implicitWidth
    implicitHeight: spinBox.implicitHeight

    SpinBox
    {
        id: spinBox
        anchors.fill: base
        editable: base.editable
        topPadding: 0
        bottomPadding: 0
        padding: UM.Theme.getSize("narrow_margin").width

        // The stepSize of the SpinBox is intentionally set to be always `1`
        // As SpinBoxes can only contain integer values the `base.stepSize` is concidered the precision/resolution
        // increasing the spinBox.value by one increases the actual/real value of the component by `base.stepSize`
        // as such spinBox.value * base.stepSizes produces the real value of the component
        stepSize: 1
        value: Math.floor(base.value / base.stepSize)
        from: Math.floor(base.from / base.stepSize)
        to: Math.floor(base.to / base.stepSize)

        valueFromText: function(text)
        {
            return parseFloat(text.substring(prefix.length, text.length - suffix.length).replace(",", ".")) / base.stepSize;
        }

        textFromValue: function(value)
        {
            return prefix + (value * base.stepSize).toFixed(decimals) + suffix;
        }

        validator: base.validator

        onValueModified:
        {
            base.value = value * base.stepSize;
        }

        // This forces TextField to commit typed values before incrementing with buttons.
        // This fixes the typed value not being incremented when the textField has active focus.
        up.onPressedChanged:
        {
            base.forceActiveFocus()
        }

        down.onPressedChanged:
        {
            base.forceActiveFocus()
        }

        background: Item {}

        contentItem: Cura.TextField
        {
            text: spinBox.textFromValue(spinBox.value, spinBox.locale)
            validator: base.validator

            onActiveFocusChanged:
            {
                if (!activeFocus)
                {
                    base.editingFinished();
                }
            }
        }

        down.indicator: Rectangle
        {
            x: spinBox.mirrored ? parent.width - width : 0
            height: parent.height
            width: height

            UM.UnderlineBackground {
                color: spinBox.down.pressed ? spinBox.palette.mid : UM.Theme.getColor("detail_background")
            }

            UM.RecolorImage
            {
                anchors.centerIn: parent
                height: parent.height / 2.5
                width: height
                color: enabled ? UM.Theme.getColor("text") : UM.Theme.getColor("text_disabled")
                source: UM.Theme.getIcon("Minus")
            }
        }

        up.indicator: Rectangle
        {
            x: spinBox.mirrored ? 0 : parent.width - width
            height: parent.height
            width: height

            UM.UnderlineBackground {
                color: spinBox.up.pressed ? spinBox.palette.mid : UM.Theme.getColor("detail_background")
            }

            UM.RecolorImage
            {
                anchors.centerIn: parent
                height: parent.height / 2.5
                width: height
                color: enabled ? UM.Theme.getColor("text") : UM.Theme.getColor("text_disabled")
                source: UM.Theme.getIcon("Plus")
            }
        }
    }
}