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/**************************************************************************** ** ** Copyright (C) 2016 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the Qt Quick Extras module of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:LGPL$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/contact-us. ** ** GNU Lesser General Public License Usage ** Alternatively, this file may be used under the terms of the GNU Lesser ** General Public License version 3 as published by the Free Software ** Foundation and appearing in the file LICENSE.LGPL3 included in the ** packaging of this file. Please review the following information to ** ensure the GNU Lesser General Public License version 3 requirements ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. ** ** GNU General Public License Usage ** Alternatively, this file may be used under the terms of the GNU ** General Public License version 2.0 or (at your option) the GNU General ** Public license version 3 or any later version approved by the KDE Free ** Qt Foundation. The licenses are as published by the Free Software ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 ** included in the packaging of this file. Please review the following ** information to ensure the GNU General Public License requirements will ** be met: https://www.gnu.org/licenses/gpl-2.0.html and ** https://www.gnu.org/licenses/gpl-3.0.html. ** ** $QT_END_LICENSE$ ** ****************************************************************************/ import QtQuick 2.2 import QtQuick.Controls.Private 1.0 import QtQuick.Extras.Private 1.0 import QtQuick.Extras.Private.CppUtils 1.0 Style { id: circularTickmarkLabelStyle /*! The distance from the center of the control to the outer edge. */ readonly property real outerRadius: Math.min(control.width, control.height) * 0.5 property QtObject __protectedScope: QtObject { /*! Converts a value expressed as a percentage of \l outerRadius to a pixel value. */ function toPixels(percentageOfOuterRadius) { return percentageOfOuterRadius * outerRadius; } } /*! This component defines each individual tickmark. The position of each tickmark is already set; only the size needs to be specified. */ property Component tickmark: Rectangle { width: outerRadius * 0.02 antialiasing: true height: outerRadius * 0.06 color: "#c8c8c8" } /*! This component defines each individual minor tickmark. The position of each minor tickmark is already set; only the size needs to be specified. */ property Component minorTickmark: Rectangle { width: outerRadius * 0.01 antialiasing: true height: outerRadius * 0.03 color: "#c8c8c8" } /*! This defines the text of each tickmark label on the gauge. */ property Component tickmarkLabel: Text { font.pixelSize: Math.max(6, __protectedScope.toPixels(0.12)) text: styleData.value color: "#c8c8c8" antialiasing: true horizontalAlignment: Text.AlignHCenter verticalAlignment: Text.AlignVCenter } /*! \internal */ property Component panel: Item { id: panelItem implicitWidth: 250 implicitHeight: 250 function rangeUsed(count, stepSize) { return (((count - 1) * stepSize) / (control.maximumValue - control.minimumValue)) * control.angleRange; } readonly property real tickmarkSectionSize: rangeUsed(control.tickmarkCount, control.tickmarkStepSize) / (control.tickmarkCount - 1) readonly property real tickmarkSectionValue: (control.maximumValue - control.minimumValue) / (control.tickmarkCount - 1) readonly property real minorTickmarkSectionSize: tickmarkSectionSize / (control.minorTickmarkCount + 1) readonly property real minorTickmarkSectionValue: tickmarkSectionValue / (control.minorTickmarkCount + 1) readonly property int totalMinorTickmarkCount: { // The size of each section within two major tickmarks, expressed as a percentage. var minorSectionPercentage = 1 / (control.minorTickmarkCount + 1); // The amount of major tickmarks not able to be displayed; will be 0 if they all fit. var tickmarksNotDisplayed = control.__tickmarkCount - control.tickmarkCount; var count = control.minorTickmarkCount * (control.tickmarkCount - 1); // We'll try to display as many minor tickmarks as we can to fill up the space. count + tickmarksNotDisplayed / minorSectionPercentage; } readonly property real labelSectionSize: rangeUsed(control.labelCount, control.labelStepSize) / (control.labelCount - 1) function toPixels(percentageOfOuterRadius) { return percentageOfOuterRadius * outerRadius; } /*! Returns the angle of \a marker (in the range 0 ... n - 1, where n is the amount of markers) on the gauge where sections are of size tickmarkSectionSize. */ function tickmarkAngleFromIndex(tickmarkIndex) { return tickmarkIndex * tickmarkSectionSize + control.minimumValueAngle; } function labelAngleFromIndex(labelIndex) { return labelIndex * labelSectionSize + control.minimumValueAngle; } function labelPosFromIndex(index, labelWidth, labelHeight) { return MathUtils.centerAlongCircle(outerRadius, outerRadius, labelWidth, labelHeight, MathUtils.degToRadOffset(labelAngleFromIndex(index)), outerRadius - control.labelInset) } function minorTickmarkAngleFromIndex(minorTickmarkIndex) { var baseAngle = tickmarkAngleFromIndex(Math.floor(minorTickmarkIndex / control.minorTickmarkCount)); // + minorTickmarkSectionSize because we don't want the first minor tickmark to start on top of its "parent" tickmark. var relativeMinorAngle = (minorTickmarkIndex % control.minorTickmarkCount * minorTickmarkSectionSize) + minorTickmarkSectionSize; return baseAngle + relativeMinorAngle; } function tickmarkValueFromIndex(majorIndex) { return (majorIndex * tickmarkSectionValue) + control.minimumValue; } function tickmarkValueFromMinorIndex(minorIndex) { var majorIndex = Math.floor(minorIndex / control.minorTickmarkCount); var relativeMinorIndex = minorIndex % control.minorTickmarkCount; return tickmarkValueFromIndex(majorIndex) + ((relativeMinorIndex * minorTickmarkSectionValue) + minorTickmarkSectionValue); } Loader { active: control.tickmarksVisible && tickmark != null width: outerRadius * 2 height: outerRadius * 2 anchors.centerIn: parent sourceComponent: Repeater { id: tickmarkRepeater model: control.tickmarkCount delegate: Loader { id: tickmarkLoader objectName: "tickmark" + styleData.index x: tickmarkRepeater.width / 2 y: tickmarkRepeater.height / 2 transform: [ Translate { y: -outerRadius + control.tickmarkInset }, Rotation { angle: panelItem.tickmarkAngleFromIndex(styleData.index) - __tickmarkWidthAsAngle / 2 } ] sourceComponent: tickmark property int __index: index property QtObject styleData: QtObject { readonly property alias index: tickmarkLoader.__index readonly property real value: tickmarkValueFromIndex(index) } readonly property real __tickmarkWidthAsAngle: MathUtils.radToDeg((width / (MathUtils.pi2 * outerRadius)) * MathUtils.pi2) } } } Loader { active: control.tickmarksVisible && minorTickmark != null width: outerRadius * 2 height: outerRadius * 2 anchors.centerIn: parent sourceComponent: Repeater { id: minorRepeater anchors.fill: parent model: totalMinorTickmarkCount delegate: Loader { id: minorTickmarkLoader objectName: "minorTickmark" + styleData.index x: minorRepeater.width / 2 y: minorRepeater.height / 2 transform: [ Translate { y: -outerRadius + control.minorTickmarkInset }, Rotation { angle: panelItem.minorTickmarkAngleFromIndex(styleData.index) - __minorTickmarkWidthAsAngle / 2 } ] sourceComponent: minorTickmark property int __index: index property QtObject styleData: QtObject { readonly property alias index: minorTickmarkLoader.__index readonly property real value: tickmarkValueFromMinorIndex(index) } readonly property real __minorTickmarkWidthAsAngle: MathUtils.radToDeg((width / (MathUtils.pi2 * outerRadius)) * MathUtils.pi2) } } } Loader { id: labelLoader active: control.tickmarksVisible && tickmarkLabel != null width: outerRadius * 2 height: outerRadius * 2 anchors.centerIn: parent sourceComponent: Item { id: labelItem width: outerRadius * 2 height: outerRadius * 2 anchors.centerIn: parent Connections { target: control onMinimumValueChanged: valueTextModel.update() onMaximumValueChanged: valueTextModel.update() onTickmarkStepSizeChanged: valueTextModel.update() onLabelStepSizeChanged: valueTextModel.update() } Repeater { id: labelItemRepeater Component.onCompleted: valueTextModel.update(); model: ListModel { id: valueTextModel function update() { if (control.labelStepSize === 0) { return; } // Make bigger if it's too small and vice versa. // +1 because we want to show 11 values, with, for example: 0, 10, 20... 100. var difference = control.labelCount - count; if (difference > 0) { for (; difference > 0; --difference) { append({ value: 0 }); } } else if (difference < 0) { for (; difference < 0; ++difference) { remove(count - 1); } } var index = 0; for (var value = control.minimumValue; value <= control.maximumValue && index < count; value += control.labelStepSize, ++index) { setProperty(index, "value", value); } } } delegate: Loader { id: tickmarkLabelDelegateLoader objectName: "labelDelegateLoader" + index sourceComponent: tickmarkLabel x: pos.x y: pos.y readonly property point pos: panelItem.labelPosFromIndex(index, width, height); readonly property int __index: index readonly property real __value: value property QtObject styleData: QtObject { readonly property var value: index != -1 ? tickmarkLabelDelegateLoader.__value : 0 readonly property alias index: tickmarkLabelDelegateLoader.__index } } } } } } }