为每个 TumblerColumn 添加自定义边框

Question

我刚刚开始研究 QML 和 QT Quick Controls，并一直在研究 Tumbler 控件。目前，我修改了示例并尝试对其进行自定义以感受控件。

所以，它的立场是这样的：

Tumbler {
        id: tumbler
        anchors.centerIn: parent

        Label {
            id: characterMetrics
            font.bold: true
            font.pixelSize: textSingleton.font.pixelSize * 1.25
            visible: false
            text: "M"
        }

// Just add the month column for simplicity
TumblerColumn {
            id: monthColumn
            width: characterMetrics.width * 3 + tumbler.delegateTextMargins
            model: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]
        }
}

现在我已经覆盖了大部分默认样式如下：

style: TumblerStyle {
            id: tumblerStyle

            delegate: Item {
                implicitHeight: (tumbler.height - padding.top - padding.bottom) / tumblerStyle.visibleItemCount

                Text {
                    id: label
                    text: styleData.value
                    color: styleData.current ? "#52E16D" : "#808285"
                    font.bold: true
                    font.pixelSize: textSingleton.font.pixelSize * 1.5
                    opacity: 0.4 + Math.max(0, 1 - Math.abs(styleData.displacement)) * 0.6
                    anchors.centerIn: parent
                }
            }

            // No frame
            property Component frame: Canvas {
                onPaint: {

                }
            }

            property Component separator: Canvas {
                implicitWidth: Math.max(10, Math.round(textSingleton.implicitHeight * 0.4))
                onPaint: {
                    // Do not draw any separator
                }
            }

            // No gradient background
            property Component background: Rectangle {
            }


            property Component foreground: Item {
                clip: true
                Rectangle {
                    id: rect
                    anchors.fill: parent
                    // Go one pixel larger than our parent so that we can hide our one pixel frame
                    // that the shadow is created from.
                    anchors.margins: -1
                    color: "transparent"
                    border.color: "black"
                    visible: false
                }

                DropShadow {
                }
            }
        }

现在我想要做的不是围绕整个 tumbler 控件设置一个框架，我只想在 TumblerColumn 的顶部和底部画一条线。所以可以想象我的 Tumbler 有很多 TumblerColumns，我只想能够基本上能够沿着控件的宽度和底部在控件的顶部画一条线。

但是，似乎使用 TumblerStyle，我只能修改影响整个 Tumbler 控件的内容。如何装饰单个 TumblerColumn？

Answer 1

使用TumblerColumn的columnForeground属性:

import QtQuick 2.4
import QtQuick.Window 2.0
import QtQuick.Controls 1.2
import QtQuick.Controls.Styles 1.2
import QtQuick.Extras 1.2

Window {
    id: root
    width: 600
    height: 400
    visible: true

    Tumbler {
        id: tumbler
        anchors.centerIn: parent

        Label {
            id: characterMetrics
            font.bold: true
            visible: false
            text: "M"
        }

        // Just add the month column for simplicity
        TumblerColumn {
            id: monthColumn
            width: characterMetrics.width * 3
            model: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]
            columnForeground: Item {
                Rectangle {
                    width: parent.width
                    height: 1
                    color: "#808285"
                }

                Rectangle {
                    width: parent.width
                    height: 1
                    color: "#808285"
                    anchors.bottom: parent.bottom
                }
            }
        }

        style: TumblerStyle {
            id: tumblerStyle

            delegate: Item {
                implicitHeight: (tumbler.height - padding.top - padding.bottom) / tumblerStyle.visibleItemCount

                Text {
                    id: label
                    text: styleData.value
                    color: styleData.current ? "#52E16D" : "#808285"
                    font.bold: true
                    opacity: 0.4 + Math.max(0, 1 - Math.abs(styleData.displacement)) * 0.6
                    anchors.centerIn: parent
                }
            }

            // No frame
            property Component frame: Item {}

            // Do not draw any separator
            property Component separator: Item {}

            // No gradient background
            property Component background: Rectangle {}

            property Component foreground: Item {}
        }
    }
}

如果要对所有列使用相同的前景，请改用 TumblerStyle 中的 columnForeground 属性。

为每个 TumblerColumn 添加自定义边框

Adding a custom border for each TumblerColumn

qt

qml

qtquick2

qtquickcontrols

qtquickextras