import QtQuick
import QtQuick.Controls
import QtQuick.Layouts

Item {
    id: control

    // 属性定义
    property var value: Qt.size(0, 0)  // QSizeF
    property int decimals: 1           // 默认小数位为1
    property int precision: 2          // 精度，允许的小数位数

    // 尺寸相关属性
    property real minWidth: 0
    property real maxWidth: 999999
    property real minHeight: 0
    property real maxHeight: 999999

    // 步进增量
    property real widthStep: 1.0
    property real heightStep: 1.0

    // 是否显示步进按钮
    property bool showSpinButtons: true

    implicitHeight: 25
    implicitWidth: showSpinButtons ? 140 : 120

    // 信号 - 重命名避免与内置信号冲突
    signal asValueChanged(value: var)
    signal sizeWidthChanged(width: real)      // 改为 sizeWidthChanged
    signal sizeHeightChanged(height: real)    // 改为 sizeHeightChanged

    // 获取宽高
    function getWidth() {
        return value ? value.width : 0
    }

    function getHeight() {
        return value ? value.height : 0
    }

    // 设置值
    function setValue(newValue: var) {
        if (!control.value ||
            Math.abs(control.value.width - newValue.width) > 0.000001 ||
            Math.abs(control.value.height - newValue.height) > 0.000001) {

            // 应用边界限制
            var limitedWidth = Math.max(minWidth, Math.min(maxWidth, newValue.width))
            var limitedHeight = Math.max(minHeight, Math.min(maxHeight, newValue.height))

            // 保留精度
            limitedWidth = parseFloat(limitedWidth.toFixed(precision))
            limitedHeight = parseFloat(limitedHeight.toFixed(precision))

            value = Qt.size(limitedWidth, limitedHeight)
            asValueChanged(value)
        }
    }

    // 设置宽度
    function setWidth(width: real) {
        if (control.value && Math.abs(control.value.width - width) > 0.000001) {
            var limitedWidth = Math.max(minWidth, Math.min(maxWidth, width))
            limitedWidth = parseFloat(limitedWidth.toFixed(precision))
            control.setValue(Qt.size(limitedWidth, control.value.height))
        }
    }

    // 设置高度
    function setHeight(height: real) {
        if (control.value && Math.abs(control.value.height - height) > 0.000001) {
            var limitedHeight = Math.max(minHeight, Math.min(maxHeight, height))
            limitedHeight = parseFloat(limitedHeight.toFixed(precision))
            control.setValue(Qt.size(control.value.width, limitedHeight))
        }
    }

    // 步进增加/减少
    function stepWidth(positive: bool) {
        if (!control.value) return
        var step = positive ? widthStep : -widthStep
        setWidth(getWidth() + step)
    }

    function stepHeight(positive: bool) {
        if (!control.value) return
        var step = positive ? heightStep : -heightStep
        setHeight(getHeight() + step)
    }

    // UI布局
    RowLayout {
        anchors.fill: parent
        spacing: 4

        // 宽度部分
        Label {
            text: "W:"
            Layout.alignment: Qt.AlignVCenter
            font.pixelSize: 10
        }

        TextField {
            id: widthBox
            Layout.preferredWidth: 60
            Layout.preferredHeight: 22
            Layout.alignment: Qt.AlignVCenter
            selectByMouse: true  // 允许鼠标选择文本

            text: control.value ? control.value.width.toFixed(control.decimals) : "0.0"
            font.pixelSize: 10
            leftPadding: 4
            rightPadding: 4

            // 双击全选的处理
            MouseArea {
                id: widthMouseArea
                anchors.fill: parent
                propagateComposedEvents: true
                acceptedButtons: Qt.LeftButton
                cursorShape: Qt.IBeamCursor

                onDoubleClicked: function(mouse) {
                    parent.selectAll()
                    parent.forceActiveFocus()
                    mouse.accepted = true
                }

                onClicked: function(mouse) {
                    // 单击时设置焦点但不全选
                    parent.forceActiveFocus()
                    mouse.accepted = false
                }
            }

            onActiveFocusChanged: {
                if (activeFocus) {
                    // 如果不是双击触发的焦点变化，就全选文本
                    if (!widthMouseArea.containsPress) {
                        selectAll()
                    }
                }
            }

            // 验证器
            validator: DoubleValidator {
                bottom: control.minWidth
                top: control.maxWidth
                decimals: control.precision
                notation: DoubleValidator.StandardNotation
            }

            background: Rectangle {
                color: widthBox.enabled ? "white" : "#f0f0f0"
                border.color: widthBox.activeFocus ? "#2196F3" : "#cccccc"
                border.width: 1
                radius: 2
            }

            onEditingFinished: {
                var num = parseFloat(text)
                if (!isNaN(num) && control.value) {
                    control.setWidth(num)
                } else {
                    // 恢复原值
                    widthBox.text = control.value ?
                        control.value.width.toFixed(control.decimals) :
                        "0.0"
                }
            }

            // 键盘上下键调整
            Keys.onUpPressed: function(event) {
                control.stepWidth(true)
                event.accepted = true
            }

            Keys.onDownPressed: function(event) {
                control.stepWidth(false)
                event.accepted = true
            }
        }

        // 宽度步进按钮
        Row {
            visible: control.showSpinButtons
            spacing: 0
            Layout.alignment: Qt.AlignVCenter

            Button {
                width: 12
                height: 11
                text: "▲"
                font.pixelSize: 6
                padding: 0
                onClicked: control.stepWidth(true)

                background: Rectangle {
                    color: parent.hovered ? "#e0e0e0" : "transparent"
                    border.color: "#cccccc"
                    border.width: 1
                    radius: 2
                }
            }

            Button {
                width: 12
                height: 11
                text: "▼"
                font.pixelSize: 6
                padding: 0
                onClicked: control.stepWidth(false)

                background: Rectangle {
                    color: parent.hovered ? "#e0e0e0" : "transparent"
                    border.color: "#cccccc"
                    border.width: 1
                    radius: 2
                }
            }
        }

        // 高度部分
        Label {
            text: "H:"
            Layout.alignment: Qt.AlignVCenter
            font.pixelSize: 10
        }

        TextField {
            id: heightBox
            Layout.preferredWidth: 60
            Layout.preferredHeight: 22
            Layout.alignment: Qt.AlignVCenter
            selectByMouse: true  // 允许鼠标选择文本

            text: control.value ? control.value.height.toFixed(control.decimals) : "0.0"
            font.pixelSize: 10
            leftPadding: 4
            rightPadding: 4

            // 双击全选的处理
            MouseArea {
                id: heightMouseArea
                anchors.fill: parent
                propagateComposedEvents: true
                acceptedButtons: Qt.LeftButton
                cursorShape: Qt.IBeamCursor

                onDoubleClicked: function(mouse) {
                    parent.selectAll()
                    parent.forceActiveFocus()
                    mouse.accepted = true
                }

                onClicked: function(mouse) {
                    // 单击时设置焦点但不全选
                    parent.forceActiveFocus()
                    mouse.accepted = false
                }
            }

            onActiveFocusChanged: {
                if (activeFocus) {
                    // 如果不是双击触发的焦点变化，就全选文本
                    if (!heightMouseArea.containsPress) {
                        selectAll()
                    }
                }
            }

            // 验证器
            validator: DoubleValidator {
                bottom: control.minHeight
                top: control.maxHeight
                decimals: control.precision
                notation: DoubleValidator.StandardNotation
            }

            background: Rectangle {
                color: heightBox.enabled ? "white" : "#f0f0f0"
                border.color: heightBox.activeFocus ? "#2196F3" : "#cccccc"
                border.width: 1
                radius: 2
            }

            onEditingFinished: {
                var num = parseFloat(text)
                if (!isNaN(num) && control.value) {
                    control.setHeight(num)
                } else {
                    // 恢复原值
                    heightBox.text = control.value ?
                        control.value.height.toFixed(control.decimals) :
                        "0.0"
                }
            }

            // 键盘上下键调整
            Keys.onUpPressed: function(event) {
                control.stepHeight(true)
                event.accepted = true
            }

            Keys.onDownPressed: function(event) {
                control.stepHeight(false)
                event.accepted = true
            }
        }

        // 高度步进按钮
        Row {
            visible: control.showSpinButtons
            spacing: 0
            Layout.alignment: Qt.AlignVCenter

            Button {
                width: 12
                height: 11
                text: "▲"
                font.pixelSize: 6
                padding: 0
                onClicked: control.stepHeight(true)

                background: Rectangle {
                    color: parent.hovered ? "#e0e0e0" : "transparent"
                    border.color: "#cccccc"
                    border.width: 1
                    radius: 2
                }
            }

            Button {
                width: 12
                height: 11
                text: "▼"
                font.pixelSize: 6
                padding: 0
                onClicked: control.stepHeight(false)

                background: Rectangle {
                    color: parent.hovered ? "#e0e0e0" : "transparent"
                    border.color: "#cccccc"
                    border.width: 1
                    radius: 2
                }
            }
        }

        Item {
            Layout.fillWidth: true
        }
    }

    // 当value从外部改变时，更新输入框显示
    onValueChanged: {
        if (value) {
            if (!widthBox.activeFocus) {
                widthBox.text = value.width.toFixed(decimals)
            }
            if (!heightBox.activeFocus) {
                heightBox.text = value.height.toFixed(decimals)
            }

            // 发出单独的宽高变化信号
            sizeWidthChanged(value.width)
            sizeHeightChanged(value.height)
        }
    }
}