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qt - 列数可变的 QML Repeater 和 QML Grid Layout

转载 作者:行者123 更新时间:2023-12-05 04:08:25 28 4
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我有一个模型,它由具有某些属性的对象组成,例如:

ListModel {
id: fruitModel

ListElement {
name: "Apple"
color: "green"
cost: 2.45
}
ListElement {
name: "Orange"
color: "orange"
cost: 3.25
}
ListElement {
name: "Banana"
color: "yellow"
cost: 1.95
}
}

现在我想使用 GridLayout 显示这个模型。对于每个属性,我想在 GridLayout 中使用一个元素,例如:

GridLayout {
columns: 3

Text { text: "Apple" }
Rectangle { color: "green" }
SpinBox { value: 2.45 }

Text { text: "Orange" }
Rectangle { color: "orange" }
SpinBox { value: 3.25 }

Text { text: "Banana" }
Rectangle { color: "yellow" }
SpinBox { value: 1.95 }
}

关键是我可以轻松更改 GridLayoutcolumns 属性并使我的布局更窄(例如,以适应小屏幕)。我可以使用 Repeater 来填充 GridLayout。然而,这种方法将以错误的顺序填充我的 GridLayout:

GridLayout {
columns: 3

Repeater {
model: fruitModel
Text { text: name }
}

Repeater {
model: fruitModel
Rectangle { color: color }
}

Repeater {
model: fruitModel
SpinBox { value: value }
}
}

并且使用 Layout.columnLayout.row 附加属性是一种浪费,因为我想轻松更改 GridLayout 中的列数.

有没有办法用模型中的数据逐行填充GridLayout

UPD1:

我想要得到的行为:

enter image description here

GridLayout {
columns: parent.width > 235 ? 3 : 1

Text { text: "Apple" }
Rectangle { color: "green"; width: 40; height: 40 }
SpinBox { value: 2 }

Text { text: "Orange" }
Rectangle { color: "orange"; width: 40; height: 40 }
SpinBox { value: 3 }

Text { text: "Banana" }
Rectangle { color: "yellow"; width: 40; height: 40 }
SpinBox { value: 1 }
}

UPD2:来自@m7913d 的修改变体:

GridLayout {
id: layout
property int maxColumns: 3
columns: parent.width > 235 ? maxColumns : 1

Repeater {
model: fruitModel
Text {
text: name
Layout.row: layout.columns == maxColumns ? index : (maxColumns * index)
Layout.column: 0
}
}

Repeater {
model: fruitModel
Rectangle {
Layout.preferredWidth: 30
Layout.preferredHeight: 30
color: col
Layout.row: layout.columns == maxColumns ? index : (maxColumns * index + 1)
Layout.column: layout.columns == maxColumns ? 1 : 0
}
}

Repeater {
model: fruitModel
SpinBox {
value: val
Layout.row: layout.columns == maxColumns ? index : (maxColumns * index + 2)
Layout.column: layout.columns == maxColumns ? 2 : 0
}
}
}

它的工作但不容易修改的解决方案加上有时在布局调整大小时有消息 QGridLayoutEngine::addItem: Cell (1, 0) already taken

最佳答案

我会使用由 RowColumn(或任何其他安排)填充的 Column 作为委托(delegate)。

Column {
id: rootCol
anchors.fill: parent
Repeater {
model: fruitModel
delegate: rootCol.width > 300 ? rowDel : colDel
}

Component {
id: rowDel
Row {
Text { width: 100; height: 50; text: model.name }
Rectangle { width: 50; height: 50; color: model.color }
SpinBox { width: 150; height: 50; value: model.cost }
}
}

Component {
id: colDel
Column {
Text { width: 100; height: 50; text: model.name }
Rectangle { width: 50; height: 50; color: model.color }
SpinBox { width: 150; height: 50; value: model.cost}
}
}
}

或者也许:

Column {
id: rootCol
anchors.fill: parent
Repeater {
model: fruitModel
delegate: Flow {
anchors {
left: parent.left
right: parent.right
}

Text { width: 100; height: 50; text: model.name }
Rectangle { width: 50; height: 50; color: model.color }
SpinBox { width: 150; height: 50; value: model.value }
}
}
}

关于qt - 列数可变的 QML Repeater 和 QML Grid Layout,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/47638503/

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