1 files changed, 111 insertions, 0 deletions
diff --git a/app/TurnIndicator.qml b/app/TurnIndicator.qml
new file mode 100644
index 0000000..3bc4c0e
--- /dev/null
+++ b/app/TurnIndicator.qml
@@ -0,0 +1,111 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 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 2.2
+
+Item {
+    // This enum is actually keyboard-related, but it serves its purpose
+    // as an indication of direction for us.
+    property int direction: Qt.LeftArrow
+    property bool on: false
+
+    property bool flashing: false
+
+    scale: direction === Qt.LeftArrow ? 1 : -1
+    Timer {
+        id: flashTimer
+        interval: 500
+        running: on
+        repeat: true
+        onTriggered: flashing = !flashing
+    }
+    function paintOutlinePath(ctx) {
+        ctx.beginPath();
+        ctx.moveTo(0, height * 0.5);
+        ctx.lineTo(0.6 * width, 0);
+        ctx.lineTo(0.6 * width, height * 0.28);
+        ctx.lineTo(width, height * 0.28);
+        ctx.lineTo(width, height * 0.72);
+        ctx.lineTo(0.6 * width, height * 0.72);
+        ctx.lineTo(0.6 * width, height);
+        ctx.lineTo(0, height * 0.5);
+    }
+    Canvas {
+        id: backgroundCanvas
+        anchors.fill: parent
+
+        onPaint: {
+            var ctx = getContext("2d");
+            ctx.reset();
+
+            paintOutlinePath(ctx);
+
+            ctx.lineWidth = 1;
+            ctx.strokeStyle = "lightgrey";
+            ctx.stroke();
+        }
+    }
+    Canvas {
+        id: foregroundCanvas
+        anchors.fill: parent
+        visible: on && flashing
+
+        onPaint: {
+            var ctx = getContext("2d");
+            ctx.reset();
+
+            paintOutlinePath(ctx);
+
+            ctx.fillStyle = "green";
+            ctx.fill();
+        }
+    }
+}