Add "Styles" example

Based on the "Styles" tab of the Gallery. The motivation for this
change is to cleanup the Gallery example so that it eventually runs
nicely on various desktop and mobile platforms without major
modifications.

Task-number: QTBUG-41307
Change-Id: Iffcd3557bf7c77f5a10bda8bfda5ddb636dd5ac1
Reviewed-by: Topi Reiniö <topi.reinio@digia.com>

17 files changed, 469 insertions, 1 deletions

diff --git a/.gitignore b/.gitignore
index 33c5634d..1c265ad3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,6 +5,7 @@
 /examples/quick/controls/calendar/calendar
 /examples/quick/controls/gallery/gallery
 /examples/quick/controls/splitview/splitview
+/examples/quick/controls/styles/styles
 /examples/quick/controls/tableview/tableview
 /examples/quick/controls/touch/touch
 /examples/quick/controls/texteditor/texteditor
diff --git a/examples/quick/controls/controls.pro b/examples/quick/controls/controls.pro
index 2913e298..134a25e3 100644
--- a/examples/quick/controls/controls.pro
+++ b/examples/quick/controls/controls.pro
@@ -5,7 +5,8 @@ SUBDIRS += \
     splitview \
     tableview \
     touch \
-    basiclayouts
+    basiclayouts \
+    styles
 
 qtHaveModule(widgets) {
     SUBDIRS += texteditor
diff --git a/examples/quick/controls/styles/images/bubble.png b/examples/quick/controls/styles/images/bubble.png
new file mode 100644
index 00000000..62aa1efe
--- /dev/null
+++ b/examples/quick/controls/styles/images/bubble.png
diff --git a/examples/quick/controls/styles/images/button-pressed.png b/examples/quick/controls/styles/images/button-pressed.png
new file mode 100644
index 00000000..d64cdaa7
--- /dev/null
+++ b/examples/quick/controls/styles/images/button-pressed.png
diff --git a/examples/quick/controls/styles/images/button.png b/examples/quick/controls/styles/images/button.png
new file mode 100644
index 00000000..8ab41cc8
--- /dev/null
+++ b/examples/quick/controls/styles/images/button.png
diff --git a/examples/quick/controls/styles/images/progress-background.png b/examples/quick/controls/styles/images/progress-background.png
new file mode 100644
index 00000000..55a069df
--- /dev/null
+++ b/examples/quick/controls/styles/images/progress-background.png
diff --git a/examples/quick/controls/styles/images/progress-fill.png b/examples/quick/controls/styles/images/progress-fill.png
new file mode 100644
index 00000000..b588c958
--- /dev/null
+++ b/examples/quick/controls/styles/images/progress-fill.png
diff --git a/examples/quick/controls/styles/images/slider-handle.png b/examples/quick/controls/styles/images/slider-handle.png
new file mode 100644
index 00000000..ac4d4a0d
--- /dev/null
+++ b/examples/quick/controls/styles/images/slider-handle.png
diff --git a/examples/quick/controls/styles/images/tab.png b/examples/quick/controls/styles/images/tab.png
new file mode 100644
index 00000000..74fefab7
--- /dev/null
+++ b/examples/quick/controls/styles/images/tab.png
diff --git a/examples/quick/controls/styles/images/tab_selected.png b/examples/quick/controls/styles/images/tab_selected.png
new file mode 100644
index 00000000..665400cc
--- /dev/null
+++ b/examples/quick/controls/styles/images/tab_selected.png
diff --git a/examples/quick/controls/styles/images/textfield.png b/examples/quick/controls/styles/images/textfield.png
new file mode 100644
index 00000000..1d4a38ab
--- /dev/null
+++ b/examples/quick/controls/styles/images/textfield.png
diff --git a/examples/quick/controls/styles/main.cpp b/examples/quick/controls/styles/main.cpp
new file mode 100644
index 00000000..0193c4f9
--- /dev/null
+++ b/examples/quick/controls/styles/main.cpp
@@ -0,0 +1,52 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt Quick Controls module 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 Digia Plc and its Subsidiary(-ies) 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QGuiApplication>
+#include <QQmlApplicationEngine>
+
+int main(int argc, char *argv[])
+{
+    QGuiApplication app(argc, argv);
+
+    QQmlApplicationEngine engine;
+    engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
+
+    return app.exec();
+}
diff --git a/examples/quick/controls/styles/main.qml b/examples/quick/controls/styles/main.qml
new file mode 100644
index 00000000..e804b4a8
--- /dev/null
+++ b/examples/quick/controls/styles/main.qml
@@ -0,0 +1,378 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt Quick Controls module 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 Digia Plc and its Subsidiary(-ies) 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 2.2
+import QtQuick.Window 2.2
+import QtQuick.Layouts 1.1
+import QtQuick.Controls 1.2
+import QtQuick.Controls.Styles 1.2
+import QtQuick.Particles 2.0
+
+Window {
+    id: window
+    width: 640
+    height: 480
+    visible: true
+    title: qsTr("Styles Example")
+
+    property int columnWidth: window.width / 5
+
+    GridLayout {
+        rowSpacing: 12
+        columnSpacing: 30
+        anchors.top: parent.top
+        anchors.horizontalCenter: parent.horizontalCenter
+        anchors.margins: 30
+
+        Button {
+            text: "Button"
+            implicitWidth: columnWidth
+        }
+        Button {
+            text: "Button"
+            style: ButtonStyle {
+                background: BorderImage {
+                    source: control.pressed ? "images/button-pressed.png" : "images/button.png"
+                    border.left: 4 ; border.right: 4 ; border.top: 4 ; border.bottom: 4
+                }
+            }
+            implicitWidth: columnWidth
+        }
+        Button {
+            text: "Button"
+            style: buttonStyle
+            implicitWidth: columnWidth
+        }
+
+        TextField {
+            Layout.row: 1
+            implicitWidth: columnWidth
+        }
+        TextField {
+            style: TextFieldStyle {
+                background: BorderImage {
+                    source: "images/textfield.png"
+                    border.left: 4 ; border.right: 4 ; border.top: 4 ; border.bottom: 4
+                }
+            }
+            implicitWidth: columnWidth
+        }
+        TextField {
+            style: textFieldStyle
+            implicitWidth: columnWidth
+        }
+
+        Slider {
+            id: slider1
+            Layout.row: 2
+            value: 0.5
+            implicitWidth: columnWidth
+        }
+        Slider {
+            id: slider2
+            value: 0.5
+            implicitWidth: columnWidth
+            style: SliderStyle {
+                groove: BorderImage {
+                    height: 6
+                    border.top: 1
+                    border.bottom: 1
+                    source: "images/progress-background.png"
+                    border.left: 6
+                    border.right: 6
+                    BorderImage {
+                        anchors.verticalCenter: parent.verticalCenter
+                        source: "images/progress-fill.png"
+                        border.left: 5 ; border.top: 1
+                        border.right: 5 ; border.bottom: 1
+                        width: styleData.handlePosition
+                        height: parent.height
+                    }
+                }
+                handle: Item {
+                    width: 13
+                    height: 13
+                    Image {
+                        anchors.centerIn: parent
+                        source: "images/slider-handle.png"
+                    }
+                }
+            }
+        }
+        Slider {
+            id: slider3
+            value: 0.5
+            implicitWidth: columnWidth
+            style: sliderStyle
+        }
+
+        ProgressBar {
+            Layout.row: 3
+            value: slider1.value
+            implicitWidth: columnWidth
+        }
+        ProgressBar {
+            value: slider2.value
+            implicitWidth: columnWidth
+            style: progressBarStyle
+        }
+        ProgressBar {
+            value: slider3.value
+            implicitWidth: columnWidth
+            style: progressBarStyle2
+        }
+
+        CheckBox {
+            text: "CheckBox"
+            Layout.row: 4
+            implicitWidth: columnWidth
+        }
+
+        RadioButton {
+            text: "RadioButton"
+            implicitWidth: columnWidth
+        }
+
+        ComboBox {
+            model: ["Paris", "Oslo", "New York"]
+            implicitWidth: columnWidth
+        }
+
+        TabView {
+            Layout.row: 5
+            Layout.columnSpan: 3
+            Layout.fillWidth: true
+            implicitHeight: 30
+            Tab { title: "One" ; Item {} }
+            Tab { title: "Two" ; Item {} }
+            Tab { title: "Three" ; Item {} }
+            Tab { title: "Four" ; Item {} }
+        }
+
+        TabView {
+            Layout.row: 6
+            Layout.columnSpan: 3
+            Layout.fillWidth: true
+            implicitHeight: 30
+            Tab { title: "One" ; Item {}}
+            Tab { title: "Two" ; Item {}}
+            Tab { title: "Three" ; Item {}}
+            Tab { title: "Four" ; Item {}}
+            style: tabViewStyle
+        }
+    }
+
+    // Style delegates:
+
+    property Component buttonStyle: ButtonStyle {
+        background: Rectangle {
+            implicitHeight: 22
+            implicitWidth: columnWidth
+            color: control.pressed ? "darkGray" : control.activeFocus ? "#cdd" : "#ccc"
+            antialiasing: true
+            border.color: "gray"
+            radius: height/2
+            Rectangle {
+                anchors.fill: parent
+                anchors.margins: 1
+                color: "transparent"
+                antialiasing: true
+                visible: !control.pressed
+                border.color: "#aaffffff"
+                radius: height/2
+            }
+        }
+    }
+
+    property Component textFieldStyle: TextFieldStyle {
+        background: Rectangle {
+            implicitWidth: columnWidth
+            color: "#f0f0f0"
+            antialiasing: true
+            border.color: "gray"
+            radius: height/2
+            Rectangle {
+                anchors.fill: parent
+                anchors.margins: 1
+                color: "transparent"
+                antialiasing: true
+                border.color: "#aaffffff"
+                radius: height/2
+            }
+        }
+    }
+
+    property Component sliderStyle: SliderStyle {
+        handle: Rectangle {
+            width: 18
+            height: 18
+            color: control.pressed ? "darkGray" : "lightGray"
+            border.color: "gray"
+            antialiasing: true
+            radius: height/2
+            Rectangle {
+                anchors.fill: parent
+                anchors.margins: 1
+                color: "transparent"
+                antialiasing: true
+                border.color: "#eee"
+                radius: height/2
+            }
+        }
+
+        groove: Rectangle {
+            height: 8
+            implicitWidth: columnWidth
+            implicitHeight: 22
+
+            antialiasing: true
+            color: "#ccc"
+            border.color: "#777"
+            radius: height/2
+            Rectangle {
+                anchors.fill: parent
+                anchors.margins: 1
+                color: "transparent"
+                antialiasing: true
+                border.color: "#66ffffff"
+                radius: height/2
+            }
+        }
+    }
+
+    property Component progressBarStyle: ProgressBarStyle {
+        background: BorderImage {
+            source: "images/progress-background.png"
+            border.left: 2 ; border.right: 2 ; border.top: 2 ; border.bottom: 2
+        }
+        progress: Item {
+            clip: true
+            BorderImage {
+                anchors.fill: parent
+                anchors.rightMargin: (control.value < control.maximumValue) ? -4 : 0
+                source: "images/progress-fill.png"
+                border.left: 10 ; border.right: 10
+                Rectangle {
+                    width: 1
+                    color: "#a70"
+                    opacity: 0.8
+                    anchors.top: parent.top
+                    anchors.bottom: parent.bottom
+                    anchors.bottomMargin: 1
+                    anchors.right: parent.right
+                    visible: control.value < control.maximumValue
+                    anchors.rightMargin: -parent.anchors.rightMargin
+                }
+            }
+            ParticleSystem { id: bubbles; running: visible }
+            ImageParticle {
+                id: fireball
+                system: bubbles
+                source: "images/bubble.png"
+                opacity: 0.7
+            }
+            Emitter {
+                system: bubbles
+                anchors.bottom: parent.bottom
+                anchors.margins: 4
+                anchors.bottomMargin: -4
+                anchors.left: parent.left
+                anchors.right: parent.right
+                size: 4
+                sizeVariation: 4
+                acceleration: PointDirection { y: -6; xVariation: 3 }
+                emitRate: 6 * control.value
+                lifeSpan: 3000
+            }
+        }
+    }
+
+    property Component progressBarStyle2: ProgressBarStyle {
+        background: Rectangle {
+            implicitWidth: columnWidth
+            implicitHeight: 24
+            color: "#f0f0f0"
+            border.color: "gray"
+        }
+        progress: Rectangle {
+            color: "#ccc"
+            border.color: "gray"
+            Rectangle {
+                color: "transparent"
+                border.color: "#44ffffff"
+                anchors.fill: parent
+                anchors.margins: 1
+            }
+        }
+    }
+
+    property Component tabViewStyle: TabViewStyle {
+        tabOverlap: 16
+        frameOverlap: 4
+        tabsMovable: true
+
+        frame: Rectangle {
+            gradient: Gradient {
+                GradientStop { color: "#e5e5e5" ; position: 0 }
+                GradientStop { color: "#e0e0e0" ; position: 1 }
+            }
+            border.color: "#898989"
+            Rectangle { anchors.fill: parent ; anchors.margins: 1 ; border.color: "white" ; color: "transparent" }
+        }
+        tab: Item {
+            property int totalOverlap: tabOverlap * (control.count - 1)
+            implicitWidth: Math.min ((styleData.availableWidth + totalOverlap)/control.count - 4, image.sourceSize.width)
+            implicitHeight: image.sourceSize.height
+            BorderImage {
+                id: image
+                anchors.fill: parent
+                source: styleData.selected ? "images/tab_selected.png" : "images/tab.png"
+                border.left: 30
+                smooth: false
+                border.right: 30
+            }
+            Text {
+                text: styleData.title
+                anchors.centerIn: parent
+            }
+        }
+        leftCorner: Item { implicitWidth: 12 }
+    }
+}
diff --git a/examples/quick/controls/styles/styles.pro b/examples/quick/controls/styles/styles.pro
new file mode 100644
index 00000000..03648f4c
--- /dev/null
+++ b/examples/quick/controls/styles/styles.pro
@@ -0,0 +1,10 @@
+TEMPLATE = app
+TARGET = styles
+QT += qml quick
+
+SOURCES += \
+    main.cpp
+RESOURCES += \
+    styles.qrc
+OTHER_FILES += \
+    main.qml
diff --git a/examples/quick/controls/styles/styles.qrc b/examples/quick/controls/styles/styles.qrc
new file mode 100644
index 00000000..d2300c6f
--- /dev/null
+++ b/examples/quick/controls/styles/styles.qrc
@@ -0,0 +1,14 @@
+<RCC>
+    <qresource prefix="/">
+        <file>main.qml</file>
+        <file>images/bubble.png</file>
+        <file>images/button.png</file>
+        <file>images/button-pressed.png</file>
+        <file>images/progress-background.png</file>
+        <file>images/progress-fill.png</file>
+        <file>images/slider-handle.png</file>
+        <file>images/tab.png</file>
+        <file>images/tab_selected.png</file>
+        <file>images/textfield.png</file>
+    </qresource>
+</RCC>
diff --git a/src/controls/doc/images/qtquickcontrols-example-styles.png b/src/controls/doc/images/qtquickcontrols-example-styles.png
new file mode 100644
index 00000000..901ff75c
--- /dev/null
+++ b/src/controls/doc/images/qtquickcontrols-example-styles.png
diff --git a/src/controls/doc/src/qtquickcontrols-examples.qdoc b/src/controls/doc/src/qtquickcontrols-examples.qdoc
index 4f1ab219..8b8c1469 100644
--- a/src/controls/doc/src/qtquickcontrols-examples.qdoc
+++ b/src/controls/doc/src/qtquickcontrols-examples.qdoc
@@ -465,3 +465,15 @@
     \endcode
     \include examples-run.qdocinc
 */
+
+/*!
+    \example styles
+    \title Qt Quick Controls - Styles Example
+    \ingroup qtquickcontrols_examples
+    \brief Demonstrates custom styles
+    \image qtquickcontrols-example-styles.png
+
+    This example shows how to create custom styles for \l{Qt Quick Controls}.
+
+    \include examples-run.qdocinc
+*/