这是 QML 模型/视图范例的集合。
视图 is a collection of small QML examples relating to model and view functionality. They demonstrate how to show data from a model using the Qt Quick view types. For more information, visit the Models and Views in Qt Quick 页面。
要运行范例从 Qt Creator ，打开 Welcome 模式，然后选择范例从 Examples 。更多信息，拜访 构建和运行范例 .
GridView and PathView demonstrate usage of these types to display views.
GridView {
anchors.fill: parent
cellWidth: 100
cellHeight: 100
focus: true
model: appModel
highlight: Rectangle {
width: 80
height: 80
color: "lightsteelblue"
}
delegate: Item {
required property string icon
required property string name
required property int index
width: 100
height: 100
Image {
id: myIcon
y: 20
anchors.horizontalCenter: parent.horizontalCenter
source: parent.icon
}
Text {
anchors {
top: myIcon.bottom
horizontalCenter: parent.horizontalCenter
}
text: parent.name
}
MouseArea {
anchors.fill: parent
onClicked: parent.GridView.view.currentIndex = parent.index
}
}
}
Dynamic List demonstrates animation of runtime additions and removals to a ListView .
The ListView .onAdd signal handler runs an animation when new items are added to the view, and the ListView .onRemove another when they are removed.
Item {
SequentialAnimation {
id: addAnimation
PropertyAction {
target: delegateItem
property: "height"
value: 0
}
NumberAnimation {
target: delegateItem
property: "height"
to: 80
duration: 250
easing.type: Easing.InOutQuad
}
}
ListView.onAdd: addAnimation.start()
SequentialAnimation {
id: removeAnimation
PropertyAction {
target: delegateItem
property: "ListView.delayRemove"
value: true
}
NumberAnimation {
target: delegateItem
property: "height"
to: 0
duration: 250
easing.type: Easing.InOutQuad
}
// Make sure delayRemove is set back to false so that the item can be destroyed
PropertyAction {
target: delegateItem
property: "ListView.delayRemove"
value: false
}
}
ListView.onRemove: removeAnimation.start()
}
展开委托 demonstrates delegates that expand when activated.
It has a complex delegate the size and appearance of which can change, displacing other items in the view.
Item {
id: recipe
required property string title
required property string picture
required property string ingredients
required property string method
// Create a property to contain the visibility of the details.
// We can bind multiple element's opacity to this one property,
// rather than having a "PropertyChanges" line for each element we
// want to fade.
property real detailsOpacity : 0
MouseArea {
anchors.fill: parent
onClicked: recipe.state = 'Details';
}
// Lay out the page: picture, title and ingredients at the top, and method at the
// bottom. Note that elements that should not be visible in the list
// mode have their opacity set to recipe.detailsOpacity.
Row {
id: topLayout
x: 10
y: 10
height: recipeImage.height
width: parent.width
spacing: 10
Image {
id: recipeImage
width: 50
height: 50
source: recipe.picture
}
Item {
id: details
x: 10
width: parent.width - 20
anchors {
top: topLayout.bottom
topMargin: 10
bottom: parent.bottom
bottomMargin: 10
}
opacity: recipe.detailsOpacity
}
// A button to close the detailed view, i.e. set the state back to default ('').
TextButton {
y: 10
anchors {
right: background.right
rightMargin: 10
}
opacity: recipe.detailsOpacity
text: qsTr("Close")
onClicked: recipe.state = '';
}
states: State {
name: "Details"
PropertyChanges {
background.color: "white"
recipeImage {
// Make picture bigger
width: 130
height: 130
}
recipe {
// Make details visible
detailsOpacity: 1
x: 0
// Fill the entire list area with the detailed view
height: listView.height
}
}
// Move the list so that this item is at the top.
PropertyChanges {
recipe.ListView.view.contentY: recipe.y
explicit: true;
}
// Disallow flicking while we're in detailed view
PropertyChanges {
recipe.ListView.view.interactive: false
}
}
transitions: Transition {
// Make the state changes smooth
ParallelAnimation {
ColorAnimation {
property: "color"
duration: 500
}
NumberAnimation {
duration: 300
properties: "detailsOpacity,x,contentY,height,width"
}
}
}
}
Highlight demonstrates adding a custom highlight to a ListView .
// Define a highlight with customized movement between items.
component HighlightBar : Rectangle {
width: 200
height: 50
color: "#FFFF88"
y: ListView.view.currentItem.y
Behavior on y {
SpringAnimation {
spring: 2
damping: 0.1
}
}
}
ListView {
id: listView
width: 200
height: parent.height
x: 30
model: PetsModel { }
delegate: PetDelegate { }
focus: true
// Set the highlight delegate. Note we must also set highlightFollowsCurrentItem
// to false so the highlight delegate can control how the highlight is moved.
highlight: HighlightBar { }
highlightFollowsCurrentItem: false
}
Highlight Ranges shows the three different highlight range modes of ListView .
Rectangle { id: root property int current: 0 property bool increasing: true // Example index automation for convenience, disabled on click or tap SequentialAnimation { id: anim loops: -1 running: true ScriptAction { script: if (root.increasing) { root.current++; if (root.current >= aModel.count -1) { root.current = aModel.count - 1; root.increasing = !root.increasing; } } else { root.current--; if (root.current <= 0) { root.current = 0; root.increasing = !root.increasing; } } } PauseAnimation { duration: 500 } } ListView { id: list1 height: 50 width: parent.width model: PetsModel { id: aModel } delegate: petDelegate orientation: ListView.Horizontal highlight: Rectangle { color: "lightsteelblue" } currentIndex: root.current onCurrentIndexChanged: root.current = currentIndex focus: true } ListView { id: list2 y: 160 height: 50 width: parent.width model: PetsModel { } delegate: petDelegate orientation: ListView.Horizontal highlight: Rectangle { color: "yellow" } currentIndex: root.current preferredHighlightBegin: 80 preferredHighlightEnd: 220 highlightRangeMode: ListView.ApplyRange } ListView { id: list3 y: 320 height: 50 width: parent.width model: PetsModel {} delegate: petDelegate orientation: ListView.Horizontal highlight: Rectangle { color: "yellow" } currentIndex: root.current onCurrentIndexChanged: root.current = currentIndex preferredHighlightBegin: 125 preferredHighlightEnd: 125 highlightRangeMode: ListView.StrictlyEnforceRange } }
Sections demonstrates the various section headers and footers available to ListView .
// The delegate for each section header
Component {
id: sectionHeading
Rectangle {
width: ListView.view.width
height: childrenRect.height
color: "lightsteelblue"
required property string section
Text {
text: parent.section
font.bold: true
font.pixelSize: 20
}
}
}
ListView {
id: view
anchors.top: parent.top
anchors.bottom: buttonBar.top
width: parent.width
model: animalsModel
delegate: Text {
required property string name
text: name
font.pixelSize: 18
}
section.property: "size"
section.criteria: ViewSection.FullString
section.delegate: sectionHeading
}
Packages 使用 Package type to transition delegates between two views.
It has a Package object which defines delegate items for each view and an item that can be transferred between delegates.
Package { id: delegate required property int upTo required property int index required property string display Text { id: listDelegate width: parent.width height: 25 text: 'Empty' Package.name: 'list' } Text { id: gridDelegate width: parent.width / 2 height: 50 text: 'Empty' Package.name: 'grid' } Rectangle { id: wrapper width: parent?.width ?? 0 height: 25 color: 'lightsteelblue' Text { text: delegate.display anchors.centerIn: parent } state: delegate.upTo > delegate.index ? 'inGrid' : 'inList' states: [ State { name: 'inList' ParentChange { target: wrapper parent: listDelegate } }, State { name: 'inGrid' ParentChange { target: wrapper parent: gridDelegate x: 0 y: 0 width: gridDelegate.width height: gridDelegate.height } } ] transitions: [ Transition { ParentAnimation { NumberAnimation { properties: 'x,y,width,height' duration: 300 } } } ] } }
A DelegateModel allows the individual views to access their specific items from the shared package delegate.
DelegateModel { id: visualModel delegate: Delegate { upTo: root.upTo } model: myModel } ListView { id: lv height: parent.height / 2 width: parent.width model: visualModel.parts.list } GridView { y: parent.height / 2 height: parent.height / 2 width: parent.width cellWidth: width / 2 cellHeight: 50 model: visualModel.parts.grid }
ObjectModel uses an ObjectModel for the model instead of a ListModel .
ObjectModel {
id: itemModel
Rectangle {
width: view.width
height: view.height
color: "#FFFEF0"
Text {
anchors.centerIn: parent
text: qsTr("Page 1")
font.bold: true
}
Component.onDestruction: if (root.printDestruction) print("destroyed 1")
}
Rectangle {
width: view.width
height: view.height
color: "#F0FFF7"
Text {
anchors.centerIn: parent
text: qsTr("Page 2")
font.bold: true
}
Component.onDestruction: if (root.printDestruction) print("destroyed 2")
}
Rectangle {
width: view.width
height: view.height
color: "#F4F0FF"
Text {
anchors.centerIn: parent
text: qsTr("Page 3")
font.bold: true
}
Component.onDestruction: if (root.printDestruction) print("destroyed 3")
}
}
ListView {
id: view
anchors {
fill: parent
bottomMargin: 30
}
model: itemModel
preferredHighlightBegin: 0
preferredHighlightEnd: 0
highlightRangeMode: ListView.StrictlyEnforceRange
orientation: ListView.Horizontal
snapMode: ListView.SnapOneItem
flickDeceleration: 2000
cacheBuffer: 200
}
Display Margins uses delegates to display items and implements a simple header and footer components.