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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0 WITH Qt-GPL-exception-1.0
import QtQuick 2.15
import QtQuick.Layouts 1.15
import QtQuick.Shapes 1.15
import QtQuick.Templates 2.15 as T
import QtQuickDesignerTheme 1.0
import StudioTheme 1.0 as StudioTheme
import StudioControls 1.0 as StudioControls
import QtQuickDesignerColorPalette 1.0

SecondColumnLayout {
    id: colorEditor

    property color color
    property bool supportGradient: false
    property variant backendValue
    property variant value: {
        if (colorEditor.backendValue === undefined
                || colorEditor.backendValue.value === undefined)
            return "white" // default color for Rectangle

        if (colorEditor.isVector3D)
            return Qt.rgba(colorEditor.backendValue.value.x,
                           colorEditor.backendValue.value.y,
                           colorEditor.backendValue.value.z, 1)
        else
            return colorEditor.backendValue.value
    }
    property alias gradientPropertyName: cePopup.gradientPropertyName

    property alias gradientThumbnail: gradientThumbnail
    property alias shapeGradientThumbnail: shapeGradientThumbnail

    property bool shapeGradients: false
    property color originalColor
    property bool isVector3D: false

    property alias spacer: spacer

    function resetShapeColor() {
        colorEditor.backendValue.resetValue()
    }

    Connections {
        id: backendConnection
        target: colorEditor

        function onValueChanged() {
            if (cePopup.isNotInGradientMode())
                colorEditor.color = colorEditor.value
        }

        function onBackendValueChanged() {
            if (cePopup.isNotInGradientMode())
                colorEditor.color = colorEditor.value
        }
    }

    Timer {
        id: colorEditorTimer
        repeat: false
        interval: 100
        running: false
        onTriggered: {
            backendConnection.enabled = false

            if (colorEditor.backendValue !== undefined) {
                if (colorEditor.isVector3D)
                    colorEditor.backendValue.value = Qt.vector3d(
                                colorEditor.color.r, colorEditor.color.g,
                                colorEditor.color.b)
                else
                    colorEditor.backendValue.value = colorEditor.color
            }

            backendConnection.enabled = true
        }
    }

    onColorChanged: {
        if (!cePopup.isInValidState)
            return

        if (colorEditor.supportGradient && cePopup.gradientModel.hasGradient) {
            var hexColor = convertColorToString(colorEditor.color)
            hexTextField.text = hexColor
            cePopup.commitGradientColor()
        }

        // Delay setting the color to keep ui responsive
        if (cePopup.isNotInGradientMode())
            colorEditorTimer.restart()
    }

    Spacer {
        implicitWidth: StudioTheme.Values.actionIndicatorWidth
    }

    Rectangle {
        id: preview
        implicitWidth: StudioTheme.Values.twoControlColumnWidth
        implicitHeight: StudioTheme.Values.height
        color: colorEditor.color
        border.color: StudioTheme.Values.themeControlOutline
        border.width: StudioTheme.Values.border

        Rectangle {
            id: gradientThumbnail
            anchors.fill: parent
            anchors.margins: StudioTheme.Values.border
            visible: !cePopup.isNotInGradientMode()
                     && !colorEditor.shapeGradients
                     && cePopup.hasLinearGradient()
        }

        Shape {
            id: shape
            anchors.fill: parent
            anchors.margins: StudioTheme.Values.border
            visible: !cePopup.isNotInGradientMode()
                     && colorEditor.shapeGradients

            ShapePath {
                id: shapeGradientThumbnail
                startX: shape.x - 1
                startY: shape.y - 1
                strokeWidth: -1
                strokeColor: "green"

                PathLine {
                    x: shape.x - 1
                    y: shape.height
                }
                PathLine {
                    x: shape.width
                    y: shape.height
                }
                PathLine {
                    x: shape.width
                    y: shape.y - 1
                }
            }
        }

        Image {
            anchors.fill: parent
            source: "images/checkers.png"
            fillMode: Image.Tile
            z: -1
        }

        MouseArea {
            anchors.fill: parent
            onClicked: {
                cePopup.opened ? cePopup.close() : cePopup.open()
                forceActiveFocus()
            }
        }

        ColorEditorPopup {
            id: cePopup
            x: cePopup.__defaultX
            y: cePopup.__defaultY
        }
    }

    Spacer {
        implicitWidth: StudioTheme.Values.twoControlColumnGap
    }

    LineEdit {
        id: hexTextField
        implicitWidth: StudioTheme.Values.twoControlColumnWidth
                       + StudioTheme.Values.actionIndicatorWidth
        width: implicitWidth
        enabled: cePopup.isNotInGradientMode()
        writeValueManually: true
        validator: RegExpValidator {
            regExp: /#[0-9A-Fa-f]{6}([0-9A-Fa-f]{2})?/g
        }
        showTranslateCheckBox: false
        backendValue: colorEditor.backendValue

        onAccepted: colorEditor.color = colorFromString(hexTextField.text)
        onCommitData: {
            colorEditor.color = colorFromString(hexTextField.text)
            if (cePopup.isNotInGradientMode()) {
                if (colorEditor.isVector3D) {
                    backendValue.value = Qt.vector3d(colorEditor.color.r,
                                                     colorEditor.color.g,
                                                     colorEditor.color.b)
                } else {
                    backendValue.value = colorEditor.color
                }
            }
        }
    }

    ExpandingSpacer {
        id: spacer
    }

    StudioControls.Menu {
        id: contextMenu

        StudioControls.MenuItem {
            text: qsTr("Open Color Dialog")
            onTriggered: colorPalette.showColorDialog(colorEditor.color)
        }
    }

    Component.onCompleted: cePopup.determineActiveColorMode()

    onBackendValueChanged: {
        cePopup.determineActiveColorMode()
    }
}