Display draw status

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Get the draw status of your map view or scene view to know when all layers in the map or scene have finished drawing.

screenshot

Use case

You may want to display a loading indicator while layers are loading.

How it works

  1. Create a MapView and connect to the MapQuickView::drawStatusChanged signal.
  2. Use drawStatus on the to determine draw status.

Relevant API

  • Map
  • drawStatus
  • MapQuickView::drawStatusChanged
  • MapView

Tags

draw, loading, map, render

Sample Code

DisplayDrawingStatus.qmlDisplayDrawingStatus.cppDisplayDrawingStatus.h
                                                                                     
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// [WriteFile Name=DisplayDrawingStatus, Category=Maps]
// [Legal]
// Copyright 2016 Esri.

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0

// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// [Legal]

import QtQuick 2.6
import QtQuick.Controls 2.2
import QtGraphicalEffects 1.0
import Esri.Samples 1.0

DisplayDrawingStatusSample {
    id: displayDrawingStatusSample
    clip: true
    width: 800
    height: 600

    // add a mapView component
    MapView {
        anchors.fill: parent
        objectName: "mapView"
    }

    // dim window if map is drawing
    Rectangle {
        anchors.fill: parent
        color: "transparent"
        visible: displayDrawingStatusSample.mapDrawing

        RadialGradient {
            anchors.fill: parent
            opacity: 0.15
            gradient: Gradient {
                GradientStop { position: 0.0; color: "lightgrey" }
                GradientStop { position: 0.7; color: "black" }
            }
        }

        // pop up to show if MapView is drawing
        Rectangle {
            anchors.centerIn: parent
            width: 100
            height: 100
            radius: 3
            opacity: 0.85
            color: "#E0E0E0"
            border.color: "black"

            Column {
                anchors {
                    centerIn: parent
                    topMargin: 5
                }
                spacing: 5

                BusyIndicator {
                    anchors.horizontalCenter: parent.horizontalCenter
                    height: 60
                    running: true
                }

                Text {
                    anchors.horizontalCenter: parent.horizontalCenter
                    font {
                        weight: Font.Black
                        pixelSize: 12
                    }
                    height: 20
                    horizontalAlignment: Text.AlignHCenter
                    text: "Drawing..."
                }
            }
        }
    }
}

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