TNCcat/qml/OverlayWindow.qml

pragma ComponentBehavior: Bound
import QtQuick
import TNCat

// One screen-filling, click-through window that holds the cat and the chip.
// Wayland does not let a client place its own window, so there the cat moves
// inside this overlay instead of the window moving across the desktop.
Window {
    id: win

    required property CatController cat
    required property AppSettings settings

    signal settingsRequested()

    // Fullscreen is a visibility, not a visible flag, so the mode switch has to
    // go through visibility or the two fight each other.
    property bool overlayActive: false

    readonly property int catW: settings.catSize
    readonly property int catH: Math.round(catW * sprite.implicitHeight / sprite.implicitWidth)
    readonly property real groundY: height - catH - settings.bottomMargin

    // Only the cat itself should swallow clicks; everything else falls through.
    function refreshInputRegion() {
        Platform.setInputRegion(win, Qt.rect(Math.round(cat.x), Math.round(groundY), catW, catH))
    }

    visibility: overlayActive ? Window.FullScreen : Window.Hidden
    color: "transparent"
    flags: Qt.FramelessWindowHint | Qt.WindowStaysOnTopHint | Qt.Tool
           | Qt.NoDropShadowWindowHint | Qt.WindowDoesNotAcceptFocus
    title: qsTr("TNCat")

    onOverlayActiveChanged: {
        if (!overlayActive)
            return
        cat.stageWidth = width
        cat.catWidth = catW
        refreshInputRegion()
    }
    onWidthChanged: cat.stageWidth = width
    onCatWChanged: cat.catWidth = catW

    Binding {
        target: win.cat
        property: "catCenter"
        value: Qt.point(win.x + win.cat.x + win.catW / 2, win.y + win.groundY + win.catH / 2)
    }

    // Coalesce mask updates: one X11 round trip per frame of walking is plenty.
    Timer {
        interval: 33
        running: win.overlayActive
        repeat: true
        onTriggered: win.refreshInputRegion()
    }

    Chip {
        id: curl
        x: win.cat.chipX - width / 2
        y: win.height - height - win.settings.bottomMargin
        width: Math.round(win.settings.catSize * 0.46)
        height: Math.round(width * curl.implicitHeight / curl.implicitWidth)
        visible: win.cat.chipVisible
        spin: win.cat.chipSpin

        Behavior on x {
            NumberAnimation { duration: 320; easing.type: Easing.OutQuad }
        }
    }

    Cup {
        id: mug
        x: win.cat.cupX - width / 2
        y: win.height - height - win.settings.bottomMargin
        width: Math.round(win.settings.catSize * 0.38)
        height: Math.round(width * mug.implicitHeight / mug.implicitWidth)
        visible: win.cat.cupVisible
    }

    Item {
        id: catItem
        x: win.cat.x
        y: win.groundY
        width: win.catW
        height: win.catH

        Cat {
            id: sprite
            anchors.fill: parent
            coat: win.settings.coat
            facingRight: win.cat.facingRight
            mood: win.cat.moodName
            lifted: win.cat.dragging
            petted: win.cat.hovered && !win.cat.dragging
            look: win.cat.look
            showCodes: win.settings.showCodes

            Accessible.role: Accessible.Button
            Accessible.name: qsTr("TNCat")
        }

        HoverHandler {
            onHoveredChanged: win.cat.hovered = hovered
        }

        DragHandler {
            target: null
            onActiveChanged: win.cat.dragging = active
            onCentroidChanged: {
                if (active)
                    win.cat.x = Math.max(0, Math.min(win.cat.stageWidth - win.catW,
                                                     catItem.x + centroid.position.x - centroid.pressPosition.x))
            }
        }

        TapHandler {
            acceptedButtons: Qt.LeftButton
            onTapped: win.cat.pet()
            onDoubleTapped: win.settingsRequested()
            onLongPressed: win.settingsRequested()
        }

        TapHandler {
            acceptedButtons: Qt.RightButton
            onTapped: win.settingsRequested()
        }
    }
}