qt-creator/share/qtcreator/qmldesigner/itemLibraryQmlSources/SectionView.qml

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import QtQuick 2.1
import QtQuick.Controls 1.0 as Controls

// view displaying one item library section including its grid

Column {
    id: sectionView

    // public

    property variant itemHighlight

    property int entriesPerRow
    property int cellWidth
    property int cellHeight

    property variant currentItem: gridView.currentItem

    function expand() {
        gridFrame.state = ""
    }

    Component.onCompleted: {
        if (mouseArea.expandedFlag) {
            gridFrame.state = ""
        } else {
            gridFrame.state = "shrunk"
        }
    }

    signal itemSelected(int itemLibId)
    signal itemDragged(int itemLibId)

    function setSelection(itemSectionIndex)
    {
        gridView.currentIndex = itemSectionIndex
    }

    function unsetSelection()
    {
        gridView.currentIndex = -1
    }

    function focusSelection(flickable) {
        var pos = -1;

        if (!gridView.currentItem)
            return;

        var currentItemX = sectionView.x + gridFrame.x + gridView.x + gridView.currentItem.x;
        var currentItemY = sectionView.y + gridFrame.y + gridView.y + gridView.currentItem.y
                - gridView.contentY;  // workaround: GridView reports wrong contentY

        if (currentItemY < flickable.contentY)
            pos = Math.max(0, currentItemY)

        else if ((currentItemY + gridView.currentItem.height) >
                 (flickable.contentY + flickable.height - 1))
            pos = Math.min(Math.max(0, flickable.contentHeight - flickable.height),
                           currentItemY + gridView.currentItem.height - flickable.height + 1)

        if (pos >= 0)
            flickable.contentY = pos
    }

    // internal

    ItemsViewStyle { id: style }

    Component {
        id: itemDelegate

        SingleItemView {
            id: item

            width: cellWidth
            height: cellHeight

            onItemPressed: sectionView.itemSelected(itemLibId)
            onItemDragged: sectionView.itemDragged(itemLibId)
        }
    }

    // clickable header bar
    Rectangle {
        width: parent.width
        height: style.sectionTitleHeight

        gradient: Gradient {
            GradientStop {color: '#555' ; position: 0}
            GradientStop {color: '#444' ; position: 1}
        }

        Rectangle {
            color:"#333"
            width: parent.width
            height: 1
        }

        Rectangle {
            color: "#333"
            anchors.bottom: parent.bottom
            width: parent.width
            height: 1
        }

        Item {
            id: arrow

            Rectangle { y: 1; x: 1; height: 1; width: 9;  color: style.sectionArrowColor }
            Rectangle { y: 2; x: 2; height: 1; width: 7;  color: style.sectionArrowColor }
            Rectangle { y: 3; x: 3; height: 1; width: 5;  color: style.sectionArrowColor }
            Rectangle { y: 4; x: 4; height: 1; width: 3;  color: style.sectionArrowColor }
            Rectangle { y: 5; x: 5; height: 1; width: 1;  color: style.sectionArrowColor }

            anchors.left: parent.left
            anchors.leftMargin: 4
            anchors.verticalCenter: parent.verticalCenter
            width: 11
            height: 6

            transformOrigin: Item.Center
        }
        Controls.Label {
            id: text

            anchors.verticalCenter: parent.verticalCenter
            anchors.left: arrow.right
            anchors.leftMargin: 4

            text: sectionName  // to be set by model
            color: style.sectionTitleTextColor
            elide: Text.ElideMiddle
            font.bold: true
            style: Text.Sunken
            styleColor: "#292929"
        }
        MouseArea {
            id: mouseArea
            property bool expandedFlag: sectionExpanded

            anchors.fill: parent
            onClicked: gridFrame.toggleExpanded()
        }
    }

    Item { height: 2; width: 1 }

    Item {
        id: gridFrame

        Behavior on opacity { NumberAnimation{easing.type: Easing.Linear ; duration: 80} }
        Behavior on height { NumberAnimation{easing.type: Easing.OutCubic ; duration: 140} }

        function toggleExpanded() {
            state = ((state == "")? "shrunk":"")

            itemLibraryModel.setExpanded(state === "", text.text);
        }

        clip: true
        width: entriesPerRow * cellWidth + 1
        height: gridView.model !== undefined ? Math.ceil(gridView.count / sectionView.entriesPerRow) * cellHeight + 1 : 0

        anchors.horizontalCenter: parent.horizontalCenter

        GridView {
            id: gridView

            Connections {
                target: itemLibraryModel  // to be set in Qml context
                onSectionVisibilityChanged: {
                    /* workaround: reset model in order to get the grid view
updated properly under all conditions */
                    if (changedSectionLibId == sectionLibId)
                        gridView.model = sectionEntries
                }
            }

            anchors.fill: parent
            anchors.rightMargin: 1
            anchors.bottomMargin: 1

            cellWidth: sectionView.cellWidth
            cellHeight: sectionView.cellHeight
            model: sectionEntries  // to be set by model
            delegate: itemDelegate
            highlight: itemHighlight
            interactive: false
            highlightFollowsCurrentItem: false
        }

        states: [
            State {
                name: "shrunk"
                PropertyChanges {
                    target: gridFrame
                    height: 0
                    opacity: 0
                }
                PropertyChanges {
                    target: arrow
                    rotation: -90
                }
            }
        ]
    }

    Item { height: 4; width: 1 }
}