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Diffstat (limited to 'examples/declarative-camera/ZoomControl.qml')
-rw-r--r-- | examples/declarative-camera/ZoomControl.qml | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/examples/declarative-camera/ZoomControl.qml b/examples/declarative-camera/ZoomControl.qml new file mode 100644 index 000000000..681f63bd5 --- /dev/null +++ b/examples/declarative-camera/ZoomControl.qml @@ -0,0 +1,118 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the examples of the Qt Mobility Components. +** +** $QT_BEGIN_LICENSE:BSD$ +** 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 Nokia Corporation 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 Qt 4.7 +import QtMultimediaKit 1.1 + +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 + } + + onMousePositionChanged: { + 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 } + } + ] + } +} |