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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** 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 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 2.0
import QtMultimedia 5.0
Item {
id : zoomControl
property real currentZoom : 1
property real maximumZoom : 1
signal zoomTo(real value)
visible: zoomControl.maximumZoom > 1
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(5, (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
Rectangle {
anchors.fill: parent
smooth: true
radius: 8
border.color: "white"
border.width: 2
color: "black"
opacity: 0.3
}
Rectangle {
id: groove
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: "white"
opacity: 0.5
}
Text {
id: zoomText
anchors {
left: bar.right; leftMargin: 16
}
y: Math.min(parent.height - height, Math.max(0, groove.y - height / 2))
text: "x" + Math.round(zoomControl.currentZoom * 100) / 100
font.bold: true
color: "white"
style: Text.Raised; styleColor: "black"
opacity: 0.85
font.pixelSize: 18
}
}
}
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