Added FPS counter to the Planets example

Change-Id: Ia7900610debde06d9ddf37319f58dd48cb6fc4a1
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@theqtcompany.com>
Reviewed-by: Pasi Keränen <pasi.keranen@digia.com>

3 files changed, 113 insertions, 0 deletions

diff --git a/examples/canvas3d/threejs/planets/FpsDisplay.qml b/examples/canvas3d/threejs/planets/FpsDisplay.qml
new file mode 100644
index 0000000..c0dad19
--- /dev/null
+++ b/examples/canvas3d/threejs/planets/FpsDisplay.qml
@@ -0,0 +1,101 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the QtCanvas3D module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** 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 http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import QtQuick 2.0
+
+Item {
+    id: fpsDisplayControl
+    property bool hidden: true
+    property real fps: 0.0
+
+    onHiddenChanged: {
+        if (fpsDisplayControl.hidden)
+            fpsDisplay.color = "transparent";
+        else
+            fpsDisplay.color = "#000000FF";
+    }
+
+    onFpsChanged: {
+        fpsDisplay.updateFps();
+    }
+
+    Rectangle {
+        anchors.fill: parent
+        id: fpsDisplay
+        color: "transparent"
+
+        property real maxFps: 60.0
+        property color maxFpsColor: "#00FF00"
+        property color minFpsColor: "#FF0000"
+
+        function updateFps() {
+            var scale = (fps > maxFps)?1.0:(fps/maxFps);
+            var r = (1 - scale) * minFpsColor.r + scale * maxFpsColor.r;
+            var g = (1 - scale) * minFpsColor.g + scale * maxFpsColor.g;
+            var b = (1 - scale) * minFpsColor.b + scale * maxFpsColor.b;
+            var a = (1 - scale) * minFpsColor.a + scale * maxFpsColor.a;
+            fpsCauge.height = scale * fpsDisplay.height;
+            fpsCauge.color = Qt.rgba(r,g,b,a);
+        }
+
+        Rectangle {
+            id: fpsCauge
+            width: parent.width
+            anchors.bottom: parent.bottom
+            visible: !fpsDisplayControl.hidden
+        }
+
+        Text {
+            id: fpsText
+            text: ""+(fps | 0)
+            font.family: "Helvetica"
+            font.pixelSize: 16
+            font.weight: Font.Light
+            color: "white"
+            anchors.fill: parent
+            verticalAlignment: Text.AlignVCenter
+            horizontalAlignment: Text.AlignHCenter
+            visible: !fpsDisplayControl.hidden
+        }
+    }
+    MouseArea {
+        anchors.fill: parent
+        onClicked: {
+            fpsDisplayControl.hidden = !fpsDisplayControl.hidden;
+        }
+    }
+}
+
diff --git a/examples/canvas3d/threejs/planets/planets.qml b/examples/canvas3d/threejs/planets/planets.qml
index 8d24515..65febe7 100644
--- a/examples/canvas3d/threejs/planets/planets.qml
+++ b/examples/canvas3d/threejs/planets/planets.qml
@@ -108,6 +108,7 @@ Item {
 
         onPaintGL: {
             GLCode.paintGL(canvas3d);
+            fpsDisplay.fps = canvas3d.fps;
         }
 
         onResizeGL: {
@@ -339,4 +340,14 @@ Item {
         color: "white"
         text: "Viewing Distance"
     }
+
+    // FPS display, initially hidden, clicking will show it
+    FpsDisplay {
+        id: fpsDisplay
+        anchors.left: parent.left
+        anchors.top: parent.top
+        width: 32
+        height: 64
+        hidden: true
+    }
 }
diff --git a/examples/canvas3d/threejs/planets/planets.qrc b/examples/canvas3d/threejs/planets/planets.qrc
index 200322c..55b58ee 100644
--- a/examples/canvas3d/threejs/planets/planets.qrc
+++ b/examples/canvas3d/threejs/planets/planets.qrc
@@ -8,6 +8,7 @@
         <file>PlanetButton.qml</file>
         <file>InfoSheet.qml</file>
         <file>StyledSlider.qml</file>
+        <file>FpsDisplay.qml</file>
         <file>images/sunmap.jpg</file>
         <file>images/mercurymap.jpg</file>
         <file>images/mercurybump.jpg</file>