[volume] Volume controller.

src/qml/VolumeControl.qml

+/****************************************************************************************
+**
+** Copyright (C) 2014 Aleksi Suomalainen <suomalainen.aleksi@gmail.com>
+** All rights reserved.
+**
+** You may use this file under the terms of BSD license as follows:
+**
+** Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are met:
+**     * Redistributions of source code must retain the above copyright
+**       notice, this list of conditions and the following disclaimer.
+**     * Redistributions in binary form must reproduce the above copyright
+**       notice, this list of conditions and the following disclaimer in the
+**       documentation and/or other materials provided with the distribution.
+**     * Neither the name of the author nor the
+**       names of its contributors may be used to endorse or promote products
+**       derived from this software without specific prior written permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+** WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+** DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR
+** ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+** (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+** LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+** ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+** SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+**
+****************************************************************************************/
+
+import QtQuick 2.1
+import QtQuick.Controls 1.0
+import QtQuick.Controls.Nemo 1.0
+import QtQuick.Controls.Styles.Nemo 1.0
+import org.nemomobile.lipstick 0.1
+
+ProgressBar {
+    id: volumeSlider
+    width: parent.width
+    minimumValue: 0
+    maximumValue: volumeControl.maximumVolume
+    property bool shouldbevisible
+
+    opacity: volumeSlider.shouldbevisible ? 1 : 0
+    Behavior on opacity {
+        NumberAnimation {
+            duration: 300
+            onRunningChanged: if (!running && volumeSlider.opacity == 0) volumeControl.windowVisible = false
+        }
+    }
+    Timer {
+        id: voltimer
+        interval: 2000
+        onTriggered: volumeSlider.shouldbevisible = false
+    }
+
+    Connections {
+        target: volumeControl
+        onVolumeChanged: {
+            volumeSlider.value = volumeControl.volume
+            if (volumeControl.windowVisible) {
+                voltimer.restart()
+            }
+        }
+        onWindowVisibleChanged: {
+            if (volumeControl.windowVisible) {
+                volumeSlider.shouldbevisible = true
+                voltimer.restart()
+            }
+        }
+    }
+}