View inQMLC++View on GitHubSample viewer app
Rotate a map.
Use case
A user may wish to view the map in an orientation other than north-facing.
How to use the sample
Use the slider to rotate the map.
How it works
- Instantiate a
Map
object.
- Set the map to a
MapView
object.
- Use
mapView.setViewpointRotation(angle)
to indicate the rotation angle.
Relevant API
rotate, rotation, viewpoint
Sample Code
MapRotation.qml
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// [WriteFile Name=MapRotation, 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
import QtQuick.Controls
import Esri.ArcGISRuntime
Rectangle {
width: 800
height: 600
// Map view UI presentation at top
MapView {
id: mv
anchors.fill: parent
Component.onCompleted: {
// Set the focus on MapView to initially enable keyboard navigation
forceActiveFocus();
}
Map {
Basemap {
initStyle: Enums.BasemapStyleArcGISStreets
}
initialViewpoint: vc
}
ViewpointCenter {
id: vc
center: Point {
x: -11070722
y: 4658720
spatialReference: SpatialReference {
wkid: 102100
}
}
targetScale: 55151630
}
// Slider UI presentation at bottom
Rectangle {
anchors {
bottom: mv.attributionTop
horizontalCenter: parent.horizontalCenter
}
width: childrenRect.width
height: childrenRect.height
radius: 10
opacity: 0.8
// sliderCombo: A slider and text for its value
Row {
id: sliderCombo
spacing: 5
Slider {
id: slider1
opacity: 0.7
anchors {
verticalCenter: parent.verticalCenter
}
// Slider controls degrees of rotation
from: 0.0
to: 360.0
onPressedChanged: {
// Call C++ invokable function to change the rotation
// of the map view
mv.setViewpointRotation(value);
}
}
Text {
anchors {
verticalCenter: parent.verticalCenter
margins: 5
}
horizontalAlignment: TextInput.AlignHCenter
font.pixelSize: 20
text: slider1.value.toPrecision(3);
}
}
}
}
}