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Diffstat (limited to 'tradeshow/enterprise-kinectdatavis/RangeSlider.qml')
| -rw-r--r-- | tradeshow/enterprise-kinectdatavis/RangeSlider.qml | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/tradeshow/enterprise-kinectdatavis/RangeSlider.qml b/tradeshow/enterprise-kinectdatavis/RangeSlider.qml new file mode 100644 index 0000000..b39d658 --- /dev/null +++ b/tradeshow/enterprise-kinectdatavis/RangeSlider.qml @@ -0,0 +1,163 @@ +/**************************************************************************** +** +** Copyright (C) 2015 Digia Plc and/or its subsidiary(-ies). +** Contact: For any questions to Digia, please use the contact form at +** http://www.qt.io +** +** This file is part of the examples of the Qt Enterprise Embedded. +** +** $QT_BEGIN_LICENSE:BSD$ +** 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 2.1 + +Item { + id: main + property real minimumValue: 1 + property real maximumValue: 2048 + property real valueSpacing: 50 + property real lowValue: minimumValue + property real highValue: maximumValue + + implicitHeight: 50 + Component { + id: handleComponent + Image { + property alias touchPoint: lowTouchPoint + anchors.fill: parent + source: "handle.png" + MultiPointTouchArea { + id: lowTouchArea + anchors.fill: parent + touchPoints: [ + TouchPoint { + id: lowTouchPoint + property real draggedX: pressed ? sceneX - _startSceneX : 0 + property real baseX: pressed ? _startBaseX : _handleItem.x + property real _startSceneX + property real _startBaseX + + onSceneXChanged: updateHandlesPosFromDrag() + onPressedChanged: { + _startBaseX = _handleItem.x + _startSceneX = lowTouchArea.mapToItem(null, x).x + } + } + ] + } + } + } + Rectangle { + anchors { left: parent.left; right: parent.right; verticalCenter: parent.verticalCenter } + height: 10 + gradient: Gradient { + GradientStop { position: 0.0; color: "lightgrey" } + GradientStop { position: 1.0; color: "grey" } + } + radius: 4 + } + Rectangle { + anchors { verticalCenter: parent.verticalCenter; left: lowHandle.horizontalCenter; right: highHandle.horizontalCenter } + height: 20 + gradient: Gradient { + GradientStop { position: 0.0; color: "#006CD9" } + GradientStop { position: 1.0; color: "#00407F" } + } + } + Loader { + id: lowHandle + property var touchPoint: item.touchPoint + + anchors { top: parent.top; bottom: parent.bottom } + width: height + sourceComponent: handleComponent + + property bool _hInvertComponent: false + property Item _handleItem: this + + onXChanged: if (!_programmaticalChange) lowValue = _convert(lowHandle.x, _minimumLowPos, _maximumLowPos, minimumValue, maximumValue - valueSpacing) + } + Loader { + id: highHandle + property var touchPoint: item.touchPoint + + anchors { top: parent.top; bottom: parent.bottom } + width: height + sourceComponent: handleComponent + + property bool _hInvertComponent: true + property Item _handleItem: this + + onXChanged: if (!_programmaticalChange) highValue = _convert(highHandle.x, _minimumHighPos, _maximumHighPos, minimumValue + valueSpacing, maximumValue) + } + + property bool _programmaticalChange: false + property real _minimumLowPos: -lowHandle.width / 2 + property real _maximumHighPos: main.width - highHandle.width / 2 + property real _maximumLowPos: _maximumHighPos - lowHandle.width + property real _minimumHighPos: _minimumLowPos + lowHandle.width + on_MaximumLowPosChanged: updateHandlesPosFromLimits() + on_MaximumHighPosChanged: updateHandlesPosFromLimits() + + function _convert(src, srcMin, srcMax, dstMin, dstMax) { + return (src - srcMin) / (srcMax - srcMin) * (dstMax - dstMin) + dstMin + } + function updateHandlesPosFromDrag() { + var lowX, highX; + if (lowHandle.touchPoint.baseX + lowHandle.touchPoint.draggedX > highHandle.touchPoint.baseX + highHandle.touchPoint.draggedX - lowHandle.width) { + var overdrag = lowHandle.touchPoint.baseX + lowHandle.touchPoint.draggedX - (highHandle.touchPoint.baseX + highHandle.touchPoint.draggedX - lowHandle.width) + // Not perfect when only one touch point is pressed, but works well enough. + var handleOverdragAdj = overdrag / 2 + lowX = lowHandle.touchPoint.baseX + lowHandle.touchPoint.draggedX - handleOverdragAdj + highX = highHandle.touchPoint.baseX + highHandle.touchPoint.draggedX + handleOverdragAdj + } else { + lowX = lowHandle.touchPoint.baseX + lowHandle.touchPoint.draggedX + highX = highHandle.touchPoint.baseX + highHandle.touchPoint.draggedX + } + if (lowX < _minimumLowPos) + lowX = _minimumLowPos + if (highX < lowX + lowHandle.width) + highX = lowX + lowHandle.width + if (highX > _maximumHighPos) + highX = _maximumHighPos + if (lowX > highX - lowHandle.width) + lowX = highX - lowHandle.width + lowHandle.x = lowX + highHandle.x = highX + } + function updateHandlesPosFromLimits() { + _programmaticalChange = true + lowHandle.x = _convert(lowValue, minimumValue, maximumValue - valueSpacing, _minimumLowPos, _maximumLowPos) + highHandle.x = _convert(highValue - valueSpacing, minimumValue, maximumValue - valueSpacing, _minimumHighPos, _maximumHighPos) + _programmaticalChange = false + } +} |