我遇到了一个问题,可以在附带的屏幕截图中看到
有ApplicationWindow,它有标题和ListView,用于水平布局。每个列表项应该是一页应用程序。遗憾的是,基页的宽度未正确设置以填充其父级的宽度(白色背景,而不是灰色背景)。
这是主页面的代码,它应该加载登录页面 - 它显示在图像上。
ApplicationWindow {
id: root_window
title: Style.applicationName
visible: true
color: "white"
width: Style.windowWidth
height: Style.windowHeight
ColumnLayout {
id: root_layout
spacing: 0
width: root_window.width
height: root_window.height
SmonHeader {
id: smon_user_app_header
height: Style.headerHeight
anchors.top: parent.top
Layout.alignment: Qt.AlignLeft
Layout.fillWidth: true
}
Component.onCompleted: {
console.log("Main width: " + width);
}
ListView {
id: navigation
width: parent.width
height: parent.height
orientation: ListView.Horizontal
interactive: true // disable manual pageChange
snapMode: ListView.SnapOneItem // while moving to right, finish move
highlightRangeMode: ListView.StrictlyEnforceRange // mouse gesture make currentIndex change
highlightMoveDuration: 400 // speed up pages change (swap)
model: ObjectModel {
/* First page with login capabilities */
Login {
id: login_module
width: root_layout.width
height: root_layout.height
}
}
}
}
/* Private function definition*/
function init_database()
{
var database = Storage.LocalStorage.openDatabaseSync(Style.databaseName, Style.databaseVersion, Style.databaseDescr, Style.databaseSize);
smonDatabase.startDatabase(Style.databaseName);
}
Component.onCompleted: {
init_database();
}
}
这是登录页面的基础
import QtQuick 2.4
import QtQuick.Controls 1.2
import QtQuick.Layouts 1.1
import QtQuick.Dialogs 1.2
import "../"
import "./common"
Rectangle {
id: login_page
// why parent.width is not set ?
anchors.fill: parent
//width: parent.width
//Layout.fillWidth: true
property string credentials_title: qsTr("Přístupové údaje")
property string available_devices: qsTr("Dostupné servery")
property string identity_title: qsTr("Identita")
property string password_title: qsTr("Heslo")
property string domain_title: qsTr("Doména")
property string infoLine_title: qsTr("Zapamatovat přihlašovací údaje")
property string username_title: qsTr("Jméno");
Component.onCompleted: {
console.log("Login width: " + login_page.width);
control.cancelEnabled = false
}
ColumnLayout{
id: navigation
spacing: Style.spacing
anchors.left: parent.left
anchors.leftMargin: Style.defaultAnchors
Layout.fillWidth: true
anchors.fill: parent
width: parent.width
Text {
id: title
//anchors.top: parent.top
//anchors.left: parent.left
font.pointSize: Style.fontSizeHeading
text: credentials_title
}
ColumnLayout{
id: navigationLogin
spacing: Style.spacing
anchors.left: parent.left
anchors.leftMargin: Style.defaultAnchors
Layout.fillWidth: true
Layout.bottomMargin: Style.bottomMargin
width: (parent.width - 4*Style.defaultAnchors)
GridLayout {
id: input_login
rowSpacing: Style.denseSpacing
columns: 2
columnSpacing: Style.spacing
anchors.left: parent.left
anchors.leftMargin: Style.defaultAnchors
width: 200
Text {
id: user_name
font.pointSize: Style.fontSizeSubHeading
text: username_title
}
SmonComboBox {
id: user
width: parent.width
value: smonRole.user
object: smonRole
prop: "user"
isEditable: true
dataModel: smonRole.userData
selectedIndex: smonRole.userNameSelected
}
Text {
id: password_name
font.pointSize: Style.fontSizeSubHeading
text: password_title
}
SmonTextField {
id: password
width: parent.width
type: "password"
object: smonRole
prop: "pass"
value: smonRole.pass
onEnterPressed: {
user.enabled = false
password.enabled = false
//control.okEnabled = false
control.okEnabled = false
control.cancelEnabled = true
smonRole.save();
smonCommunication.connect();
}
onValueChanged: {
if(password.value !== "")
{
control.okEnabled = true
}
else
{
control.okEnabled = false
}
}
}
}
ColumnLayout {
id: scanning
spacing: Style.denseSpacing
anchors.left: parent.left
//Layout.fillWidth: true
RowLayout {
id: slider_component
Text {
id: scanningHeader
font.pointSize: Style.fontSizeSubHeading
text: qsTr("Perioda vyhledávání zařízení");
}
Text {
id: value
font.pointSize: Style.fontSizeInfo
anchors.left: scanningHeader.right
anchors.leftMargin: Style.defaultAnchors
width: 30
text: slider.value
}
}
Slider {
id: slider
minimumValue: 2
maximumValue: 30
Layout.fillWidth: true
stepSize: 1
value: smonCommunication.scanPeriod
onValueChanged: {
smonCommunication.scanPeriod = slider.value;
}
}
}
SmonControlPanel {
id: control
width: parent.width
okEnabled: smonRole.user != "" && smonRole.pass != ""
okVisible: true
cancelVisible: true
onSignalOk: {
// hide content
user.enabled = false
password.enabled = false
control.okEnabled = false
control.cancelEnabled = true
smonRole.save();
smonCommunication.connect();
}
onSignalCancel: {
// show content again
password.enabled = true
user.enabled = true
//domain.enabled = true
control.cancelEnabled = false
control.okEnabled = true
//smonConnection.logout();
smonCommunication.disconnect();
smonRole.disconnected();
}
}
}
Text {
id: favourite
font.pointSize: Style.fontSizeHeading
text: available_devices
}
ListView{
id: servers
Layout.fillHeight: true
width: parent.width
model: smonCommunication.devicesList
delegate: Rectangle {
id: serverList
height: 80
width: parent.width
ColumnLayout{
Text {
id: serverName
text: modelData.bluetooth_name
}
Text {
id: rssi
text: modelData.bluetooth_rssi
}
}
MouseArea {
id: bt_device
anchors.fill: parent
onClicked: {
if(smonCommunication.btCanConnect === true)
smonCommunication.connect(index);
}
}
}
}
}
MessageDialog {
id: errorDialog
standardButtons: StandardButton.Cancel | StandardButton.OK
visible: false;
informativeText: smonCommunication.errorMessage
onInformativeTextChanged: {
errorDialog.visible = true;
}
}
}
主页面或加载的页面上是否有问题?谢谢你的帮助...
答案 0 :(得分:4)
问题在于anchors.fill: parent
中的ObjectModel
位。
此处parent
不是ListView,而是ListView
' s contentItem
,其隐式宽度为100px。
在你的最小例子中,这样的事情应该有效:
model: ObjectModel {
/* First page with login capabilities */
Rectangle{
id: one
//anchors.fill: parent <- parent is not navigation
width: navigation.width
height: 50
color: "red"
}
}
一般来说,您不应在代理中使用parent
属性。
答案 1 :(得分:1)
所以,在得到ddriver和Kevin Krammer(谢谢)的答案之后,我做了一个最小的工作示例。
我停止使用ColumnLayout,并尽可能地设置所有内容。
这是代码
import QtQuick 2.4
import QtQuick.Controls 1.3
import QtQuick.Layouts 1.1
import QtQml.Models 2.1
ApplicationWindow {
id: root_window
title: "Hello world"
visible: true
color: "white"
width: 480
height: 520
Rectangle {
id: smon_user_app_header
height: 50
color: "blue"
width: parent.width
}
ListView {
id: navigation
orientation: ListView.Horizontal
interactive: true // disable manual pageChange
snapMode: ListView.SnapOneItem // while moving to right, finish move
highlightRangeMode: ListView.StrictlyEnforceRange // mouse gesture make currentIndex change
highlightMoveDuration: 400 // speed up pages change (swap)
anchors.top: smon_user_app_header.bottom
anchors.bottom: root_window.bottom
width: parent.width
height: 400
model: ObjectModel {
/* First page with login capabilities */
Rectangle{
id: one
anchors.fill: parent
color: "red"
}
}
}
}
以下是它的外观