如何访问 GridView - 或 ListView - 元素的 属性
How to access the property of a GridView - or ListView - element
这是代码,我创建了 4 个按钮。单击其中一个时,我希望它的颜色变为红色,而所有其他颜色变为黑色。
但是看起来我无法访问 color
属性。
Rectangle {
id: root
width: 200; height: 100
DelegateModel {
id: visualModel
model: ListModel {
ListElement { my_color: "red" }
ListElement { my_color: "black" }
ListElement { my_color: "black" }
ListElement { my_color: "black" }
}
groups: [
DelegateModelGroup { name: "selected" }
]
delegate: Rectangle {
id: item
height: 25
width: 200
color:my_color
MouseArea {
anchors.fill: parent
onClicked: {
console.log(visualModel.items.get(index).color)
for (var i = 0; i < root.count; i++){
if(index == i)
visualModel.items.get(i).color = "red";
else
visualModel.items.get(i).color = "black";
}
}
}
}
}
ListView {
anchors.fill: parent
model: visualModel
}
}
我建议您使用 QML 控件中的 ExclusiveGroup
。通常它用于 Action
,但也可以用于任何其他 Item
。来自 Qt 文档:
It is possible to add support for ExclusiveGroup for an object or
control. It should have a checked property, and either a
checkedChanged, toggled(), or toggled(bool) signal.
所以我们只需要添加合适的 属性。小例子:
import QtQuick 2.5
import QtQuick.Window 2.0
import QtQuick.Controls 1.4
Window {
width: 200
height: 400
ExclusiveGroup { id: exclusiveGroup }
ListView {
anchors.fill: parent
anchors.margins: 5
spacing: 2
model: 10
delegate: Rectangle {
id: myItem
property bool checked: false // <-- this is necessary
height: 30
width: parent.width
color: myItem.checked ? "lightblue" : "#DEDEDE"
border { width: 1; color: "#999" }
radius: 5
Text { text: "item" + (index + 1); anchors.centerIn: parent}
MouseArea {
anchors.fill: parent
cursorShape: Qt.PointingHandCursor
onClicked: myItem.checked = !myItem.checked;
}
Component.onCompleted: {
exclusiveGroup.bindCheckable(myItem);
}
}
}
}
这是代码,我创建了 4 个按钮。单击其中一个时,我希望它的颜色变为红色,而所有其他颜色变为黑色。
但是看起来我无法访问 color
属性。
Rectangle {
id: root
width: 200; height: 100
DelegateModel {
id: visualModel
model: ListModel {
ListElement { my_color: "red" }
ListElement { my_color: "black" }
ListElement { my_color: "black" }
ListElement { my_color: "black" }
}
groups: [
DelegateModelGroup { name: "selected" }
]
delegate: Rectangle {
id: item
height: 25
width: 200
color:my_color
MouseArea {
anchors.fill: parent
onClicked: {
console.log(visualModel.items.get(index).color)
for (var i = 0; i < root.count; i++){
if(index == i)
visualModel.items.get(i).color = "red";
else
visualModel.items.get(i).color = "black";
}
}
}
}
}
ListView {
anchors.fill: parent
model: visualModel
}
}
我建议您使用 QML 控件中的 ExclusiveGroup
。通常它用于 Action
,但也可以用于任何其他 Item
。来自 Qt 文档:
It is possible to add support for ExclusiveGroup for an object or control. It should have a checked property, and either a checkedChanged, toggled(), or toggled(bool) signal.
所以我们只需要添加合适的 属性。小例子:
import QtQuick 2.5
import QtQuick.Window 2.0
import QtQuick.Controls 1.4
Window {
width: 200
height: 400
ExclusiveGroup { id: exclusiveGroup }
ListView {
anchors.fill: parent
anchors.margins: 5
spacing: 2
model: 10
delegate: Rectangle {
id: myItem
property bool checked: false // <-- this is necessary
height: 30
width: parent.width
color: myItem.checked ? "lightblue" : "#DEDEDE"
border { width: 1; color: "#999" }
radius: 5
Text { text: "item" + (index + 1); anchors.centerIn: parent}
MouseArea {
anchors.fill: parent
cursorShape: Qt.PointingHandCursor
onClicked: myItem.checked = !myItem.checked;
}
Component.onCompleted: {
exclusiveGroup.bindCheckable(myItem);
}
}
}
}