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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
****************************************************************************/

import QtQuick 2.15
import QtQuickDesignerTheme 1.0
import HelperWidgets 2.0
import StudioControls 1.0 as StudioControls
import StudioTheme 1.0 as StudioTheme

Rectangle {
    id: myRoot

    border.width: 1
    property bool isBaseState
    property bool isCurrentState
    property color baseColor
    property string delegateStateName
    property string delegateStateImageSource
    property int delegateStateImageSize
    property bool delegateHasWhenCondition
    property string delegateWhenConditionString
    property bool hasAnnotation: checkAnnotation()

    readonly property bool isDefaultState: isDefault

    signal delegateInteraction

    color: baseColor
    border.color: Theme.qmlDesignerBorderColor()

    function autoComplete(text, pos, explicitComplete, filter) {
        var stringList = statesEditorModel.autoComplete(text, pos, explicitComplete)
        return stringList
    }

    function checkAnnotation() {
        return statesEditorModel.hasAnnotation(internalNodeId)
    }

    MouseArea {
        id: mouseArea
        anchors.fill: parent

        acceptedButtons: Qt.LeftButton
        onClicked: {
            focus = true
            root.currentStateInternalId = internalNodeId
            contextMenu.dismiss() // close potentially open context menu
            myRoot.delegateInteraction()
        }
    }

    StudioControls.AbstractButton {
        id: removeStateButton
        buttonIcon: StudioTheme.Constants.closeCross
        anchors.right: parent.right
        anchors.rightMargin: 4
        anchors.verticalCenter: stateNameField.verticalCenter
        visible: !isBaseState

        onClicked: {
            myRoot.delegateInteraction()
            if (isDefaultState)
                statesEditorModel.resetDefaultState()

            root.deleteState(internalNodeId)
        }
    }

    StudioControls.Menu {
        id: contextMenu

        StudioControls.MenuItem {
            enabled: !isBaseState
            text: qsTr("Set when Condition")
            onTriggered: {
                bindingEditor.showWidget()
                bindingEditor.text = delegateWhenConditionString
                bindingEditor.prepareBindings()
            }
        }

        StudioControls.MenuItem {
            enabled: !isBaseState && delegateHasWhenCondition
            text: qsTr("Reset when Condition")
            onTriggered: {
               statesEditorModel.resetWhenCondition(internalNodeId)
            }
        }

        StudioControls.MenuItem {
            enabled: !isBaseState && !isDefaultState
            text: qsTr("Set as Default")
            onTriggered: {
                statesEditorModel.setStateAsDefault(internalNodeId)
            }
        }

        StudioControls.MenuItem {
            enabled: (!isBaseState && isDefaultState) || (isBaseState && modelHasDefaultState)
            text: qsTr("Reset Default")
            onTriggered: {
                statesEditorModel.resetDefaultState()
            }
        }

        StudioControls.MenuItem {
            enabled: !isBaseState
            text: (hasAnnotation ? qsTr("Edit Annotation")
                                 : qsTr("Add Annotation"))
            onTriggered: {
                statesEditorModel.setAnnotation(internalNodeId)
                hasAnnotation = checkAnnotation()
            }
        }

        StudioControls.MenuItem {
            enabled: !isBaseState && hasAnnotation
            text: qsTr("Remove Annotation")
            onTriggered: {
                statesEditorModel.removeAnnotation(internalNodeId)
                hasAnnotation = checkAnnotation()
            }
        }

        onClosed: {
            stateNameField.actionIndicator.forceVisible = false
        }

        onOpened: {
            hasAnnotation = checkAnnotation()
            myRoot.delegateInteraction()
        }
    }


    StudioControls.TextField {
        id: stateNameField

        actionIndicator.onClicked: {
            stateNameField.actionIndicator.forceVisible = true
            contextMenu.popup()
        }

        onEditChanged: {
            if (contextMenu.open && stateNameField.edit)
                contextMenu.dismiss()
        }

        actionIndicator.icon.text: delegateHasWhenCondition
                              ? StudioTheme.Constants.actionIconBinding : StudioTheme.Constants.actionIcon

        translationIndicatorVisible: false
        y: 4
        anchors.left: parent.left
        // use the spacing which the image to the delegate rectangle has
        anchors.leftMargin: 4
        anchors.right: removeStateButton.left
        anchors.rightMargin: 2

        readOnly: isBaseState

        onActiveFocusChanged: {
            if (activeFocus)
                 root.currentStateInternalId = internalNodeId
        }

        Component.onCompleted: {
            text = delegateStateName
        }

        property string oldValue

        onEditingFinished: {
            if (stateNameField.oldValue === stateNameField.text)
                return

            stateNameField.oldValue = stateNameField.text

            if (stateNameField.text !== delegateStateName)
                statesEditorModel.renameState(internalNodeId, stateNameField.text)
        }
    }

    Item {
        id: stateImageArea
        anchors.topMargin: 2
        anchors.horizontalCenter: parent.horizontalCenter
        anchors.top: stateNameField.bottom

        height: delegateStateImageSize + 2
        width: delegateStateImageSize + 2

        visible: expanded
        Rectangle {
            anchors.margins: -1
            anchors.fill: stateImage
            border.width: 1
            border.color: Theme.qmlDesignerBackgroundColorDarker()
        }
        Image {
            id: stateImage
            anchors.centerIn: parent
            source: delegateStateImageSource
            sourceSize.width: delegateStateImageSize
            sourceSize.height: delegateStateImageSize
        }
    }

    Text {
        id: stateDefaultIndicator
        anchors.left: parent.left
        anchors.leftMargin: StudioTheme.Values.height
        anchors.right: removeStateButton.left
        anchors.rightMargin: 4
        anchors.bottom: parent.bottom
        anchors.bottomMargin: 4

        color: Theme.color(Theme.PanelTextColorLight)
        font.italic: true
        font.pixelSize: Theme.smallFontPixelSize()

        visible: expanded && (isDefaultState || (isBaseState && !modelHasDefaultState))

        text: ("* " + qsTr("Default"))
    }

    BindingEditor {
        property string newWhenCondition

        property Timer timer: Timer {
            id: timer
            running: false
            interval: 50
            repeat: false
            onTriggered: statesEditorModel.setWhenCondition(internalNodeId, bindingEditor.newWhenCondition)
        }

        id: bindingEditor

        stateModelNodeProperty: statesEditorModel.stateModelNode()

        onRejected: {
            hideWidget()
        }
        onAccepted: {
            bindingEditor.newWhenCondition = bindingEditor.text.trim()
            timer.start()
            hideWidget()
        }
    }

}