ReferenceError: ueUserInfoListView is not defined
ReferenceError: ueUserInfoListView is not defined
我正在开发 QML/Qt 应用程序,我有以下 ListView
,名称 ueUserInfoListView:
ListView
{
id: ueUserInfoListView
antialiasing: true
Layout.alignment: Qt.AlignHCenter|Qt.AlignVCenter
Layout.fillWidth: true
Layout.fillHeight: true
Layout.margins: 8
clip: true
spacing: 64
orientation: ListView.Horizontal
highlightFollowsCurrentItem: true
delegate: Image
{
id: ueUserInfoListViewDelegate
source: "image://uePeopleModel/"+model.ueRoleImage
opacity: 0.3
fillMode: Image.PreserveAspectFit
function ueDoOpacity()
{
if(ueUserInfoListViewDelegate===ueUserInfoListView.currentItem)
opacity=1.0
else
opacity=0.3
}
Behavior on opacity
{
NumberAnimation
{
duration: 300
} // NumberAnimation
} // Behavior
Component.onCompleted:
{
ueUserInfoListViewDelegate.focusChanged.connect(ueDoOpacity)
} // Component.onCompleted
} // delegate
Component.onCompleted:
{
model=uePeopleModel
} // Component.onCompleted
preferredHighlightBegin: width/2-70
preferredHighlightEnd: width/2+70
highlightRangeMode: ListView.StrictlyEnforceRange
currentIndex: count/2
} // ListView
我正在尝试从另一个分离的(根据文件)Item
调用 ueUserInfoListView,命名为 ueProductSelector:
import QtQuick 2.5
import QtQuick.Layouts 1.2
import si.mikroelektronika 1.0
Item
{
id: ueProductSelector
antialiasing: true
clip: true
Rectangle
{
id: ueProductSelectorWrapper
radius: 16
gradient: Gradient
{
GradientStop
{
position: 0
color: "#ffffff"
} // GradientStop
GradientStop
{
position: 1
color: "#000000"
} // GradientStop
} // Gradient
border.color: "#4682b4"
border.width: 1
antialiasing: true
anchors.centerIn: parent
anchors.fill: parent
ColumnLayout
{
anchors.margins: parent.radius/2
spacing: 0
antialiasing: true
anchors.fill: parent
anchors.centerIn: parent
GridView
{
id: ueProductGridView
antialiasing: true
clip: true
Layout.fillWidth: true
Layout.fillHeight: true
cellWidth: 144
cellHeight: 144
model: ueProductsModel
delegate: Rectangle
{
radius: 16
clip: true
width: ueProductGridView.cellWidth-8
height: ueProductGridView.cellHeight-8
border.color: "#4682b4"
antialiasing: true
gradient: Gradient
{
GradientStop
{
position: 0
color: "#000000"
ParallelAnimation on color
{
id: ueProductSelectorDelegateMouseAreaAnimation
loops: 1
running: false//ueDelegateMouseArea.pressed
ColorAnimation
{
from: "#4682b4"
to: "#000000"
duration: 100
} // ColorAnimation
} // ParallelAnimation
} // GradientStop
GradientStop
{
position: 1
color: "#ffffff"
} // GradientStop
} // Gradient
MouseArea
{
id: ueDelegateMouseArea
anchors.fill: parent
onClicked:
{
var selectedIndex=ueProductGridView.currentIndex=index;
ueProductSelectorDelegateMouseAreaAnimation.running=true;
ueProductGridView.currentIndex=index;
ueOrdersModel.ueSetRecordValues(ueUserInfoListView.model.get(ueUserInfoListView.currentIndex).ueRoleId,
uePlacesListView.model.get(uePlacesListView.currentIndex).ueRoleId,
ueProductGridView.model.get(selectedIndex).ueRoleProductId,
1);
} // onClicked
} // MouseArea
ColumnLayout
{
anchors.centerIn: parent
anchors.fill: parent
antialiasing: true
spacing: 8
Image
{
Layout.fillWidth: true
Layout.fillHeight: false
Layout.alignment: Qt.AlignCenter|Qt.AlignTop
Layout.topMargin: ueProductSelectorWrapper.radius+4
fillMode: Image.PreserveAspectFit
horizontalAlignment: Image.AlignHCenter
verticalAlignment: Image.AlignVCenter
antialiasing: true
source: "image://ueProductsModel/"+model.ueRoleImage
} // Image
Text
{
Layout.fillWidth: true
Layout.fillHeight: true
Layout.alignment: Qt.AlignCenter|Qt.AlignBottom
Layout.bottomMargin: ueProductSelectorWrapper.radius+4
color: "#000000"
text: model.ueRoleProductName
wrapMode: Text.WordWrap
font.family: "Courier"
textFormat: Text.RichText
font.bold: true
font.pointSize: 10
verticalAlignment: Text.AlignVCenter
horizontalAlignment: Text.AlignHCenter
} // Text
} // ColumnLayout
} // delegate
Component.onCompleted:
{
ueProductSelectorOpacityAnimator.running=true
}
} // GridView
} // ColumnLayot
} // Rectangle
} // Item
我收到以下错误:
qrc:/gui/items/UeProductSelector.qml:126: ReferenceError:
ueUserInfoListView is not defined
Why?
如果 MouseArea
在 UeDelegate.qml
中声明,并且 UeListView.qml
(为示例起见的虚构文件名)包含指定 UeDelegate
作为其delegate
,本would work。根据您提供给我们的信息,我们只能假设 ListView
不是 MouseArea
.
的祖先
详细说明这个概念:
The component instance scope hierarchy extends to out-of-line components, too. In the following example, the TitlePage.qml component creates two TitleText instances. Even though the TitleText type is in a separate file, it still has access to the title property when it is used from within the TitlePage. QML is a dynamically scoped language - depending on where it is used, the title property may resolve differently.
// TitlePage.qml
import QtQuick 2.0
Item {
property string title
TitleText {
size: 22
anchors.top: parent.top
}
TitleText {
size: 18
anchors.bottom: parent.bottom
}
}
// TitleText.qml
import QtQuick 2.0
Text {
property int size
text: "<b>" + title + "</b>"
font.pixelSize: size
}
嗯,你应该不这样做。在单独的 QML 组件文件中使用另一个组件的 ID 是邪恶的!
不惜一切代价尽量避免这种情况。它将耦合您的 QML 组件并且它们不是真正可重用的。
因此,要解决您的问题,您应该将 ListView
组件作为 属性 传递给您的 ueProductSelector
组件:
import QtQuick 2.5
import QtQuick.Layouts 1.2
import si.mikroelektronika 1.0
Item
{
id: ueProductSelector
antialiasing: true
clip: true
property ListView ueUserInfoListView
// [...]
}
那么你应该可以调用
ueOrdersModel.ueSetRecordValues(ueUserInfoListView.model.get(ueUserInfoListView.currentIndex).ueRoleId,
uePlacesListView.model.get(uePlacesListView.currentIndex).ueRoleId,
ueProductGridView.model.get(selectedIndex).ueRoleProductId,
1);
在你的第二个组件中。
ListView
组件作为 (QObject*
) 的引用传递,不应是性能关键。
我正在开发 QML/Qt 应用程序,我有以下 ListView
,名称 ueUserInfoListView:
ListView
{
id: ueUserInfoListView
antialiasing: true
Layout.alignment: Qt.AlignHCenter|Qt.AlignVCenter
Layout.fillWidth: true
Layout.fillHeight: true
Layout.margins: 8
clip: true
spacing: 64
orientation: ListView.Horizontal
highlightFollowsCurrentItem: true
delegate: Image
{
id: ueUserInfoListViewDelegate
source: "image://uePeopleModel/"+model.ueRoleImage
opacity: 0.3
fillMode: Image.PreserveAspectFit
function ueDoOpacity()
{
if(ueUserInfoListViewDelegate===ueUserInfoListView.currentItem)
opacity=1.0
else
opacity=0.3
}
Behavior on opacity
{
NumberAnimation
{
duration: 300
} // NumberAnimation
} // Behavior
Component.onCompleted:
{
ueUserInfoListViewDelegate.focusChanged.connect(ueDoOpacity)
} // Component.onCompleted
} // delegate
Component.onCompleted:
{
model=uePeopleModel
} // Component.onCompleted
preferredHighlightBegin: width/2-70
preferredHighlightEnd: width/2+70
highlightRangeMode: ListView.StrictlyEnforceRange
currentIndex: count/2
} // ListView
我正在尝试从另一个分离的(根据文件)Item
调用 ueUserInfoListView,命名为 ueProductSelector:
import QtQuick 2.5
import QtQuick.Layouts 1.2
import si.mikroelektronika 1.0
Item
{
id: ueProductSelector
antialiasing: true
clip: true
Rectangle
{
id: ueProductSelectorWrapper
radius: 16
gradient: Gradient
{
GradientStop
{
position: 0
color: "#ffffff"
} // GradientStop
GradientStop
{
position: 1
color: "#000000"
} // GradientStop
} // Gradient
border.color: "#4682b4"
border.width: 1
antialiasing: true
anchors.centerIn: parent
anchors.fill: parent
ColumnLayout
{
anchors.margins: parent.radius/2
spacing: 0
antialiasing: true
anchors.fill: parent
anchors.centerIn: parent
GridView
{
id: ueProductGridView
antialiasing: true
clip: true
Layout.fillWidth: true
Layout.fillHeight: true
cellWidth: 144
cellHeight: 144
model: ueProductsModel
delegate: Rectangle
{
radius: 16
clip: true
width: ueProductGridView.cellWidth-8
height: ueProductGridView.cellHeight-8
border.color: "#4682b4"
antialiasing: true
gradient: Gradient
{
GradientStop
{
position: 0
color: "#000000"
ParallelAnimation on color
{
id: ueProductSelectorDelegateMouseAreaAnimation
loops: 1
running: false//ueDelegateMouseArea.pressed
ColorAnimation
{
from: "#4682b4"
to: "#000000"
duration: 100
} // ColorAnimation
} // ParallelAnimation
} // GradientStop
GradientStop
{
position: 1
color: "#ffffff"
} // GradientStop
} // Gradient
MouseArea
{
id: ueDelegateMouseArea
anchors.fill: parent
onClicked:
{
var selectedIndex=ueProductGridView.currentIndex=index;
ueProductSelectorDelegateMouseAreaAnimation.running=true;
ueProductGridView.currentIndex=index;
ueOrdersModel.ueSetRecordValues(ueUserInfoListView.model.get(ueUserInfoListView.currentIndex).ueRoleId,
uePlacesListView.model.get(uePlacesListView.currentIndex).ueRoleId,
ueProductGridView.model.get(selectedIndex).ueRoleProductId,
1);
} // onClicked
} // MouseArea
ColumnLayout
{
anchors.centerIn: parent
anchors.fill: parent
antialiasing: true
spacing: 8
Image
{
Layout.fillWidth: true
Layout.fillHeight: false
Layout.alignment: Qt.AlignCenter|Qt.AlignTop
Layout.topMargin: ueProductSelectorWrapper.radius+4
fillMode: Image.PreserveAspectFit
horizontalAlignment: Image.AlignHCenter
verticalAlignment: Image.AlignVCenter
antialiasing: true
source: "image://ueProductsModel/"+model.ueRoleImage
} // Image
Text
{
Layout.fillWidth: true
Layout.fillHeight: true
Layout.alignment: Qt.AlignCenter|Qt.AlignBottom
Layout.bottomMargin: ueProductSelectorWrapper.radius+4
color: "#000000"
text: model.ueRoleProductName
wrapMode: Text.WordWrap
font.family: "Courier"
textFormat: Text.RichText
font.bold: true
font.pointSize: 10
verticalAlignment: Text.AlignVCenter
horizontalAlignment: Text.AlignHCenter
} // Text
} // ColumnLayout
} // delegate
Component.onCompleted:
{
ueProductSelectorOpacityAnimator.running=true
}
} // GridView
} // ColumnLayot
} // Rectangle
} // Item
我收到以下错误:
qrc:/gui/items/UeProductSelector.qml:126: ReferenceError: ueUserInfoListView is not defined Why?
如果 MouseArea
在 UeDelegate.qml
中声明,并且 UeListView.qml
(为示例起见的虚构文件名)包含指定 UeDelegate
作为其delegate
,本would work。根据您提供给我们的信息,我们只能假设 ListView
不是 MouseArea
.
详细说明这个概念:
The component instance scope hierarchy extends to out-of-line components, too. In the following example, the TitlePage.qml component creates two TitleText instances. Even though the TitleText type is in a separate file, it still has access to the title property when it is used from within the TitlePage. QML is a dynamically scoped language - depending on where it is used, the title property may resolve differently.
// TitlePage.qml
import QtQuick 2.0
Item {
property string title
TitleText {
size: 22
anchors.top: parent.top
}
TitleText {
size: 18
anchors.bottom: parent.bottom
}
}
// TitleText.qml
import QtQuick 2.0
Text {
property int size
text: "<b>" + title + "</b>"
font.pixelSize: size
}
嗯,你应该不这样做。在单独的 QML 组件文件中使用另一个组件的 ID 是邪恶的!
不惜一切代价尽量避免这种情况。它将耦合您的 QML 组件并且它们不是真正可重用的。
因此,要解决您的问题,您应该将 ListView
组件作为 属性 传递给您的 ueProductSelector
组件:
import QtQuick 2.5
import QtQuick.Layouts 1.2
import si.mikroelektronika 1.0
Item
{
id: ueProductSelector
antialiasing: true
clip: true
property ListView ueUserInfoListView
// [...]
}
那么你应该可以调用
ueOrdersModel.ueSetRecordValues(ueUserInfoListView.model.get(ueUserInfoListView.currentIndex).ueRoleId,
uePlacesListView.model.get(uePlacesListView.currentIndex).ueRoleId,
ueProductGridView.model.get(selectedIndex).ueRoleProductId,
1);
在你的第二个组件中。
ListView
组件作为 (QObject*
) 的引用传递,不应是性能关键。