Qt 5.7 | Qt Charts | Qml Custom Legend | ChartViewSelector.qml Example File

Qt 5.7.1 Reference Documentation

# ChartViewSelector.qml Example File

qmlcustomlegend/qml/qmlcustomlegend/ChartViewSelector.qml

      /****************************************************************************
      **
      ** Copyright (C) 2016 The Qt Company Ltd.
      ** Contact: https://www.qt.io/licensing/
      **
      ** This file is part of the Qt Charts module of the Qt Toolkit.
      **
      ** $QT_BEGIN_LICENSE:GPL$
      ** 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 General Public License Usage
      ** Alternatively, this file may be used under the terms of the GNU
      ** General Public License version 3 or (at your option) 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.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-3.0.html.
      **
      ** $QT_END_LICENSE$
      **
      ****************************************************************************/

      import QtQuick 2.0
      import QtCharts 2.0

      Item {
          id: chartViewSelector
          width: parent.width
          height: parent.height
          signal seriesAdded(string seriesName, color seriesColor)

          function highlightSeries(seriesName) {
              if (seriesName == "") {
                  if (state != "")
                      state = "";

                  for (var i = 0; i < chartViewStacked.count; i++)
                      chartViewStacked.series(i).opacity = 1.0;
              } else {
                  var targetOpacity = 0.1;
                  for (var j = 0; j < chartViewStacked.count; j++) {
                      if (chartViewStacked.series(j).name != seriesName)
                          chartViewStacked.series(j).opacity = 0.25;
                      else if (state == "highlight")
                          chartViewSelected.selectedSeries = chartViewStacked.series(j);
                  }
              }
          }

          function selectSeries(seriesName) {
              for (var i = 0; i < chartViewStacked.count; i++) {
                  if (chartViewStacked.series(i).name == seriesName) {
                      chartViewSelected.selectedSeries = chartViewStacked.series(i);
                      if (chartViewSelector.state == "")
                          chartViewSelector.state = "highlighted";
                      else
                          chartViewSelector.state = "";
                  }
              }
          }

          ChartViewStacked {
              id: chartViewStacked
              anchors.left: parent.left
              anchors.leftMargin: 0
              width: parent.width
              height: parent.height
              onSeriesAdded: chartViewSelector.seriesAdded(series.name, series.color);
          }

          ChartViewHighlighted {
              id: chartViewSelected
              anchors.left: chartViewStacked.right
              width: parent.width
              height: parent.height

              opacity: 0.0
              onClicked: {
                  chartViewSelector.state = "";
              }
          }

          states: State {
              name: "highlighted"
              PropertyChanges {
                  target: chartViewSelected
                  opacity: 1.0
              }
              PropertyChanges {
                  target: chartViewStacked
                  anchors.leftMargin: -chartViewStacked.width
                  opacity: 0.0
              }
          }

          transitions: Transition {
              PropertyAnimation {
                  properties: "width, height, opacity, anchors.leftMargin"
                  duration: 400
              }
          }
      }