1 files changed, 118 insertions, 0 deletions
diff --git a/examples/multimediawidgets/declarative-camera/ZoomControl.qml b/examples/multimediawidgets/declarative-camera/ZoomControl.qml
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+/****************************************************************************
+**
+** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** 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 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 2.0
+import QtMultimedia 5.0
+
+Item {
+    id : zoomControl
+    property real currentZoom : 1
+    property real maximumZoom : 1
+    signal zoomTo(real value)
+
+    MouseArea {
+        id : mouseArea
+        anchors.fill: parent
+
+        property real initialZoom : 0
+        property real initialPos : 0
+
+        onPressed: {
+            initialPos = mouseY
+            initialZoom = zoomControl.currentZoom
+        }
+
+        onPositionChanged: {
+            if (pressed) {
+                var target = initialZoom * Math.pow(2, (initialPos-mouseY)/zoomControl.height);
+                target = Math.max(1, Math.min(target, zoomControl.maximumZoom))
+                zoomControl.zoomTo(target)
+            }
+        }
+    }
+
+    Item {
+        id : bar
+        x : 16
+        y : parent.height/4
+        width : 24
+        height : parent.height/2
+        opacity : 0
+
+        Rectangle {
+            anchors.fill: parent
+
+            smooth: true
+            radius: 8
+            border.color: "black"
+            border.width: 2
+            color: "white"
+            opacity: 0.3
+        }
+
+        Rectangle {
+            x : 0
+            y : parent.height * (1.0 - (zoomControl.currentZoom-1.0) / (zoomControl.maximumZoom-1.0))
+            width: parent.width
+            height: parent.height - y
+            smooth: true
+            radius: 8
+            color: "black"
+            opacity: 0.5
+        }
+
+        states: State {
+            name: "ShowBar"
+            when: mouseArea.pressed || zoomControl.currentZoom > 1.0
+            PropertyChanges { target: bar; opacity: 1 }
+        }
+
+        transitions: [
+            Transition {
+                to : "ShowBar"
+                NumberAnimation { properties: "opacity"; duration: 100 }
+            },
+            Transition {
+                from : "ShowBar"
+                NumberAnimation { properties: "opacity"; duration: 500 }
+            }
+        ]
+    }
+}