MouseArea { anchors.fill: true hoverEnabled: true onEntered: rootList.currentIndex = index }
时间: 2024-02-10 11:34:12 浏览: 72
这段代码是一个监听`MouseArea`的`onEntered`信号来获取鼠标悬停的`index`,并将其存储在`rootList`的`currentIndex`属性中。`rootList`是一个`ListView`的实例。当鼠标进入`MouseArea`时,`index`变量会被设置为鼠标悬停的项目的索引,然后将其存储在`rootList`的`currentIndex`属性中。这个变量将在`ListView`中使用,以便在需要时访问当前选定的`index`。
相关问题
import QtQuick 2.0 import QtQuick.Controls 2.5 ListView { id: outerListView width: 200 height: 400 model: outerModel delegate: ItemDelegate { text: model.label width: outerListView.width ListView { id: innerListView width: 200 height: 300 model: model.children visible: expanded delegate: ItemDelegate { text: model.label width: innerListView.width highlight: checked ? Rectangle { color: "lightblue" } : null onClicked: { if (multiSelect) { checked = !checked; } else { outerListView.currentIndex = -1; checked = true; } } } } Rectangle { id: expandIcon anchors.right: parent.right anchors.verticalCenter: parent.verticalCenter width: 10 height: 10 color: "black" transform: expanded ? Rotation { origin.x: 5; origin.y: 5; angle: 90 } : Rotation { origin.x: 5; origin.y: 5; angle: 0 } MouseArea { anchors.fill: parent onClicked: expanded = !expanded } } property bool expanded: false property bool multiSelect: false property bool checked: false } } 横向LIstView
要实现横向的 `ListView`,可以在外层 `ListView` 的 `orientation` 属性中设置为 `ListView.Horizontal`。同时,需要将内层 `ListView` 的宽度设置为外层 `ListView` 中每个选项的宽度之和,以确保内层选项能够全部展示出来,可以通过外层 `ListView` 的 `contentWidth` 属性来获取。
下面是修改后的示例代码:
```qml
import QtQuick 2.0
import QtQuick.Controls 2.5
ListView {
id: outerListView
width: 400
height: 50
orientation: ListView.Horizontal
model: outerModel
delegate: ItemDelegate {
text: model.label
width: 100
ListView {
id: innerListView
width: outerListView.contentWidth
height: 50
model: model.children
visible: expanded
orientation: ListView.Horizontal
delegate: ItemDelegate {
text: model.label
width: 100
highlight: checked ? Rectangle { color: "lightblue" } : null
onClicked: {
if (multiSelect) {
checked = !checked;
} else {
outerListView.currentIndex = -1;
checked = true;
}
}
}
}
Rectangle {
id: expandIcon
anchors.right: parent.right
anchors.verticalCenter: parent.verticalCenter
width: 10
height: 10
color: "black"
transform: expanded ? Rotation { origin.x: 5; origin.y: 5; angle: 90 } : Rotation { origin.x: 5; origin.y: 5; angle: 0 }
MouseArea {
anchors.fill: parent
onClicked: expanded = !expanded
}
}
property bool expanded: false
property bool multiSelect: false
property bool checked: false
}
}
```
这样,就可以通过设置 `orientation` 属性将外层 `ListView` 设置为横向,同时将内层 `ListView` 的宽度设置为外层 `ListView` 中每个选项的宽度之和,来实现横向的 `ListView` 了。
qml得到鼠标悬停在listview的index
您可以通过在`ListView`中监听`MouseArea`的`onEntered`信号来获取鼠标悬停的`index`,然后将其存储在一个变量中。以下是一个示例代码片段:
```
ListView {
id: listView
// ...
delegate: ItemDelegate {
// ...
MouseArea {
anchors.fill: parent
hoverEnabled: true
onEntered: {
listView.currentIndex = index // 设置当前索引为鼠标悬停的索引
}
}
}
}
```
在这个示例中,我们使用`MouseArea`在`ItemDelegate`上监听`onEntered`信号,并将鼠标悬停的`index`存储在`ListView`的`currentIndex`属性中。这个变量将在`ListView`中使用,以便在需要时访问当前选定的`index`。