add shared Label for examples, and use in the Window example

It just saves the trouble of setting the Text color to the correct
palette text color repeatedly, and avoids having black text on
a dark background in case a dark theme is in use.

Change-Id: If5c38fabe7f047fa5f6956a9d8b235886ab7ab5c
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>

examples/quick/shared/Label.qml

@@ -0,0 +1,46 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** 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 2.0
+
+Text {
+    SystemPalette { id: palette }
+    color: palette.text
+}

examples/quick/shared/quick_shared.qrc

@@ -4,6 +4,7 @@
         <file>SimpleLauncherDelegate.qml</file>
         <file>Button.qml</file>
         <file>CheckBox.qml</file>
+        <file>Label.qml</file>
         <file>TextField.qml</file>
         <file>images/back.png</file>
         <file>images/next.png</file>

examples/quick/shared/shared.qrc

@@ -6,6 +6,7 @@
         <file>Slider.qml</file>
         <file>images/slider_handle.png</file>
         <file>CheckBox.qml</file>
+        <file>Label.qml</file>
         <file>TabSet.qml</file>
         <file>TextField.qml</file>
         <file>images/back.png</file>

examples/quick/window/ScreenInfo.qml

@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2015 The Qt Company Ltd.
+** Copyright (C) 2016 The Qt Company Ltd.
 ** Contact: http://www.qt.io/licensing/
 **
 ** This file is part of the examples of the Qt Toolkit.
@@ -40,6 +40,7 @@
 
 import QtQuick 2.3
 import QtQuick.Window 2.1
+import "../shared" as Shared
 
 Item {
     id: root
@@ -70,32 +71,32 @@ Item {
         y: spacing
 
         //! [screen]
-        Text {
+        Shared.Label {
             text: "Screen \"" + Screen.name + "\":"
             font.bold: true
         }
         Item { width: 1; height: 1 } // spacer
 
-        Text { text: "dimensions" }
-        Text { text: Screen.width + "x" + Screen.height }
+        Shared.Label { text: "dimensions" }
+        Shared.Label { text: Screen.width + "x" + Screen.height }
 
-        Text { text: "pixel density" }
-        Text { text: Screen.pixelDensity.toFixed(2) + " dots/mm (" + (Screen.pixelDensity * 25.4).toFixed(2) + " dots/inch)" }
+        Shared.Label { text: "pixel density" }
+        Shared.Label { text: Screen.pixelDensity.toFixed(2) + " dots/mm (" + (Screen.pixelDensity * 25.4).toFixed(2) + " dots/inch)" }
 
-        Text { text: "logical pixel density" }
-        Text { text: Screen.logicalPixelDensity.toFixed(2) + " dots/mm (" + (Screen.logicalPixelDensity * 25.4).toFixed(2) + " dots/inch)" }
+        Shared.Label { text: "logical pixel density" }
+        Shared.Label { text: Screen.logicalPixelDensity.toFixed(2) + " dots/mm (" + (Screen.logicalPixelDensity * 25.4).toFixed(2) + " dots/inch)" }
 
-        Text { text: "device pixel ratio" }
-        Text { text: Screen.devicePixelRatio.toFixed(2) }
+        Shared.Label { text: "device pixel ratio" }
+        Shared.Label { text: Screen.devicePixelRatio.toFixed(2) }
 
-        Text { text: "available virtual desktop" }
-        Text { text: Screen.desktopAvailableWidth + "x" + Screen.desktopAvailableHeight }
+        Shared.Label { text: "available virtual desktop" }
+        Shared.Label { text: Screen.desktopAvailableWidth + "x" + Screen.desktopAvailableHeight }
 
-        Text { text: "orientation" }
-        Text { text: orientationToString(Screen.orientation) + " (" + Screen.orientation + ")" }
+        Shared.Label { text: "orientation" }
+        Shared.Label { text: orientationToString(Screen.orientation) + " (" + Screen.orientation + ")" }
 
-        Text { text: "primary orientation" }
-        Text { text: orientationToString(Screen.primaryOrientation) + " (" + Screen.primaryOrientation + ")" }
+        Shared.Label { text: "primary orientation" }
+        Shared.Label { text: orientationToString(Screen.primaryOrientation) + " (" + Screen.primaryOrientation + ")" }
         //! [screen]
     }
 }

examples/quick/window/Splash.qml

@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2015 The Qt Company Ltd.
+** Copyright (C) 2016 The Qt Company Ltd.
 ** Contact: http://www.qt.io/licensing/
 **
 ** This file is part of the examples of the Qt Toolkit.

examples/quick/window/window.qml

@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2015 The Qt Company Ltd.
+** Copyright (C) 2016 The Qt Company Ltd.
 ** Contact: http://www.qt.io/licensing/
 **
 ** This file is part of the examples of the Qt Toolkit.
@@ -57,7 +57,7 @@ QtObject {
             anchors.margins: defaultSpacing
             spacing: defaultSpacing
             property real cellWidth: col.width / 3 - spacing
-            Text { text: "Control the second window:" }
+            Shared.Label { text: "Control the second window:" }
             Grid {
                 id: grid
                 columns: 3
@@ -121,7 +121,7 @@ QtObject {
                 }
                 return "unknown";
             }
-            Text {
+            Shared.Label {
                 id: visibilityLabel
                 text: "second window is " + (testWindow.visible ? "visible" : "invisible") +
                       " and has visibility " + parent.visibilityToString(testWindow.visibility)
@@ -145,7 +145,7 @@ QtObject {
         Rectangle {
             anchors.fill: parent
             anchors.margins: defaultSpacing
-            Text {
+            Shared.Label {
                 anchors.centerIn: parent
                 text: "Second Window"
             }