collisiondetector.qml Example File

    /* Copyright (c) 2012, 2013  BlackBerry Limited.
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    * http://www.apache.org/licenses/LICENSE-2.0
    *
    * Unless required by applicable law or agreed to in writing, software
    * distributed under the License is distributed on an "AS IS" BASIS,
    * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    * See the License for the specific language governing permissions and
    * limitations under the License.
    */

    import bb.cascades 1.0
    import bb.multimedia 1.0
    import QtMobility.sensors 1.2

    Container {
        bottomPadding: 20

        attachedObjects: [
            SystemSound {
                id: sound
                sound: SystemSound.CameraBurstEvent
            },

            IRProximitySensor {
                id: irProximity

                // Create a variable to hold movement state
                property real reflectance: 0

                // Turn on the sensor
                active: true

                // Keep the sensor active when the app isn't visible or the screen is off (requires app permission in bar-descriptor)
                alwaysOn: true

                onReadingChanged: { // Called when a new IR proximity reading is available
                    reflectance = reading.reflectance
                }
            },

            ProximitySensor {
                id: proximity

                // Create a variable to hold movement state
                property bool close: false

                // Turn on the sensor
                active: true

                // Keep the sensor active when the app isn't visible or the screen is off (requires app permission in bar-descriptor)
                alwaysOn: true

                onReadingChanged: { // Called when a new proximity reading is available
                    close = reading.close
                    if (close) {
                        sound.play();
                        anim.play();
                    }
                }
            }
        ]

        layout: DockLayout {}

        Label {
            horizontalAlignment: HorizontalAlignment.Center
            verticalAlignment: VerticalAlignment.Bottom

            text: qsTr("Reflectance: %1%").arg((irProximity.reflectance * 100).toPrecision(4))
            textStyle {
                base: SystemDefaults.TextStyles.BodyText
                color: Color.White
            }
        }

        Label {
            id: alert

            horizontalAlignment: HorizontalAlignment.Center
            verticalAlignment: VerticalAlignment.Center

            text: proximity.close ? qsTr("!! Mayday, Mayday !!") : qsTr("Cruising")
            textStyle {
                base: SystemDefaults.TextStyles.BigText
                color: proximity.close ? Color.Red : Color.White
            }

            animations: [
                FadeTransition {
                    id: anim
                    fromOpacity: 0.5
                    toOpacity: 1
                    duration: 300
                    easingCurve: StockCurve.BounceIn
                }
            ]
        }
    }