Adjuster.qml Example Filedemos/mobile/guitartuner/src/mycomponents/Adjuster.qml/**************************************************************************** ** ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). ** All rights reserved. ** Contact: Nokia Corporation (qt-info@nokia.com) ** ** This file is part of the QtDeclarative module 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 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 QtQuick 1.0 import "adjustbars.js" as AdjustBars /* A barchart-like adjuster component. */ Rectangle { id: adjuster property real max: 100 property real value: 0 property bool created: false signal valueChanged(real value) signal focusChangedByClick() signal arrowPressedWhenValueOverLimits() function setValue(pValue) { value = pValue; AdjustBars.fillBars(value/max*AdjustBars.maxBars); valueChanged(value); } height: 60; width: 300 color: "transparent" Keys.onRightPressed: { var val = value+max/AdjustBars.maxBars; if (val <= max) { value = val; AdjustBars.fillBars(value/max*AdjustBars.maxBars); valueChanged(value); } else { arrowPressedWhenValueOverLimits() } } Keys.onLeftPressed: { var val = value-max/AdjustBars.maxBars; if (0 <= val) { value = val; AdjustBars.fillBars(value/max*AdjustBars.maxBars); valueChanged(value); } else { arrowPressedWhenValueOverLimits() } } Component.onCompleted: { AdjustBars.createBars(); AdjustBars.fillBars(value/max*AdjustBars.maxBars); created = true; } Component.onDestruction: { AdjustBars.destroyBars; } //Dynamic objects have to be recreated when the window size changes. onWidthChanged: { if (created) { AdjustBars.destroyBars(); AdjustBars.createBars(); AdjustBars.fillBars(value/max*AdjustBars.maxBars); } } onHeightChanged: { if (created) { AdjustBars.destroyBars(); AdjustBars.createBars(); AdjustBars.fillBars(value/max*AdjustBars.maxBars); } } MouseArea { anchors.fill: parent onPositionChanged: { focusChangedByClick(); var val = mouse.x/parent.width*parent.max; if (0 < val && val < max) { parent.value = val; AdjustBars.fillBars(parent.value/parent.max*AdjustBars.maxBars); valueChanged(parent.value); } } onClicked: { focusChangedByClick(); var val = mouse.x/parent.width*parent.max; if (0 < val && val < max) { parent.value = val; AdjustBars.fillBars(parent.value/parent.max*AdjustBars.maxBars); valueChanged(parent.value); } } } } |