Improve "effects" manual test

In preparation for upgrading this to an example. Changes:
 - Group effect parameter settings visually
 - Position slider text sensibly
 - Add option for log-scale slider

Change-Id: If2166f9411ad09ca3a9c53d3f812075d689a0566
Reviewed-by: Eirik Aavitsland <eirik.aavitsland@qt.io>

tests/manual/effects/EffectSlider.qml

@@ -4,14 +4,18 @@ import QtQuick.Controls 2.15
 Slider {
     property string description
     property int precision: 2
+    property bool exponential: false
+    property double expValue: exponential ? Math.pow(2.0, value) : value
     from: 0.0
     to: 1.0
     value: 0.5
+
     Text {
         anchors.horizontalCenter: parent.horizontalCenter
-        anchors.bottom: parent.verticalCenter
-        anchors.bottomMargin: 16
-        text: parent.description + ": " + parent.value.toFixed(precision);
+        anchors.top: parent.verticalCenter
+        anchors.topMargin: 6
+        text: (parent.description.length == 0 ? "" : parent.description + ": ")
+                   + parent.expValue.toFixed(precision);
         z: 10
     }
 }

tests/manual/effects/SettingsGroup.qml

+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the 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 Qt Company Ltd 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
+** OWNER 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import QtQuick 2.15
+import QtQuick.Controls 2.15
+
+Column {
+    id: group
+    width: parent.width
+    property bool frame: true
+    leftPadding: 10
+    rightPadding: 5
+    topPadding: 5
+    bottomPadding: 5
+    Item {
+        visible: frame
+        Rectangle {
+            width: group.width
+            height: group.height
+            color: "#f1f1f0"
+            border.color: "darkgray"
+            border.width: 2
+        }
+    }
+}

tests/manual/effects/effects.pro

@@ -11,4 +11,6 @@ OTHER_FILES += \
 
 DISTFILES += \
     EffectBox.qml \
-    EffectSlider.qml
+    EffectSlider.qml \
+    EffectColor.qml \
+    SettingsGroup.qml

tests/manual/effects/qml.qrc

@@ -7,5 +7,6 @@
         <file>texture.png</file>
         <file>CustomEffect.qml</file>
         <file>EffectColor.qml</file>
+        <file>SettingsGroup.qml</file>
     </qresource>
 </RCC>