examples/declarative/listview/recipes.qml


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import "content"
// This example illustrates expanding a list item to show a more detailed view
Rect {
    id: page
    width: 400
    height: 240
    color: "black"
    resources: [
        // Delegate for the recipes.  This delegate has two modes:
        // 1. the list mode (default), which just shows the picture and title of the recipe.
        // 2. the details mode, which also shows the ingredients and method.
        Component {
            id: recipeDelegate
            Item {
                id: wrapper
                width: List.width
                // 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 "SetProperty" line for each element we
                // want to fade.
                property real detailsOpacity : 0

                // A simple rounded rectangle for the background
                Rect {
                    id: background
                    x: 1
                    y: 2
                    width: parent.width-2
                    height: parent.height-4
                    color: "#FEFFEE"
                    pen.color: "#FFBE4F"
                    radius: 5
                }
                // This mouse region covers the entire delegate.
                // When clicked it changes mode to 'Details'.  If we are already
                // in Details mode, then no change will happen.
                MouseRegion {
                    id: pageMouse
                    anchors.fill: parent
                    onClicked: { wrapper.state = 'Details' }
                }
                // Layout the page.  Picture, title and ingredients at the top, method at the
                // bottom.  Note that elements that should not be visible in the list
                // mode have their opacity set to wrapper.detailsOpacity.
                HorizontalLayout {
                    id: topLayout
                    x: 10
                    y: 10
                    spacing: 10
                    height: recipePic.height
                    width: parent.width
                    Image {
                        id: recipePic
                        source: picture
                        width: 48
                        height: 48
                    }
                    VerticalLayout {
                        height: recipePic.height
                        spacing: 5
                        width: background.width-recipePic.width-20
                        Text {
                            id: name
                            text: title
                            font.bold: true
                            font.size: 16
                        }
                        Text {
                            opacity: wrapper.detailsOpacity
                            text: "Ingredients"
                            font.size: 12
                            font.bold: true
                        }
                        Text {
                            opacity: wrapper.detailsOpacity
                            text: ingredients
                            wrap: true
                            width: parent.width
                        }
                    }
                }
                Item {
                    id: details
                    x: 10
                    width: parent.width-20
                    anchors.top: topLayout.bottom
                    anchors.topMargin: 10
                    anchors.bottom: parent.bottom
                    anchors.bottomMargin: 10
                    opacity: wrapper.detailsOpacity
                    Text {
                        id: methodTitle
                        text: "Method"
                        font.size: 12
                        font.bold: true
                        anchors.top: parent.top
                    }
                    Flickable {
                        id: flick
                        anchors.top: methodTitle.bottom
                        anchors.bottom: parent.bottom
                        width: parent.width
                        viewportHeight: methodText.height
                        clip: true
                        Text {
                            id: methodText
                            text: method
                            wrap: true
                            width: details.width
                        }
                    }
                    Image {
                        anchors.right: flick.right
                        anchors.top: flick.top
                        source: "content/pics/moreUp.png"
                        opacity: flick.atYBeginning ? 0 : 1
                    }
                    Image {
                        anchors.right: flick.right
                        anchors.bottom: flick.bottom
                        source: "content/pics/moreDown.png"
                        opacity: flick.atYEnd ? 0 : 1
                    }
                }
                // A button to close the detailed view, i.e. set the state back to default ('').
                MediaButton {
                    anchors.right: background.right
                    anchors.rightMargin: 5
                    y: 10
                    opacity: wrapper.detailsOpacity
                    text: "Close"
                    onClicked: { wrapper.state = '' }
                }
                // Make the default height equal the hight of the picture, plus margin.
                height: 68
                states: [
                    State {
                        name: "Details"
                        SetProperty {
                            target: background
                            property: "color"
                            value: "white"
                        }
                        // Make the picture bigger
                        SetProperties {
                            target: recipePic
                            width: 128
                            height: 128
                        }
                        // Make details visible
                        SetProperties {
                            target: wrapper
                            detailsOpacity: 1
                            x: 0
                        }
                        // Make the detailed view fill the entire list area
                        SetProperty {
                            target: wrapper
                            property: "height"
                            value: List.height
                        }
                        // Move the list so that this item is at the top.
                        SetProperty {
                            target: wrapper.ListView.view
                            property: "yPosition"
                            value: wrapper.y
                        }
                        // Disallow flicking while we're in detailed view
                        SetProperty {
                            target: wrapper.ListView.view
                            property: "locked"
                            value: 1
                        }
                    }
                ]
                transitions: [
                    Transition {
                        // Make the state changes smooth
                        ParallelAnimation {
                            ColorAnimation {
                                duration: 500
                            }
                            NumericAnimation {
                                duration: 300
                                properties: "detailsOpacity,x,yPosition,height,width"
                            }
                        }
                    }
                ]
            }
        }
    ]
    // The actual list
    ListView {
        id: List
        model: Recipies
        anchors.fill: parent
        clip: true
        delegate: recipeDelegate
    }
}