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// Copyright 2018 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.
using System;
using Esri.ArcGISRuntime;
using Esri.ArcGISRuntime.Mapping;
using Esri.ArcGISRuntime.UI.Controls;
using Foundation;
using UIKit;
namespace ArcGISRuntime.Samples.ChangeTimeExtent
{
[Register("ChangeTimeExtent")]
[ArcGISRuntime.Samples.Shared.Attributes.Sample(
name: "Change time extent",
category: "MapView",
description: "Filter data in layers by applying a time extent to a MapView.",
instructions: "Switch between the available options and observe how the data is filtered.",
tags: new[] { "data", "filter", "time", "time frame", "time span" })]
public class ChangeTimeExtent : UIViewController
{
// Hold references to UI controls.
private MapView _myMapView;
private UISegmentedControl _timeExtentsButton;
private readonly Uri _mapServerUri = new Uri("https://sampleserver6.arcgisonline.com/arcgis/rest/services/Hurricanes/MapServer");
private readonly Uri _featureLayerUri = new Uri("https://sampleserver6.arcgisonline.com/arcgis/rest/services/Earthquakes_Since1970/MapServer/0");
public ChangeTimeExtent()
{
Title = "Change time extent";
}
private void Initialize()
{
// Show a topographic basemap.
_myMapView.Map = new Map(BasemapStyle.ArcGISTopographic);
// Load the layers from the corresponding URIs.
ArcGISMapImageLayer imageryLayer = new ArcGISMapImageLayer(_mapServerUri);
FeatureLayer pointLayer = new FeatureLayer(_featureLayerUri);
// Add the layers to the map.
_myMapView.Map.OperationalLayers.Add(imageryLayer);
_myMapView.Map.OperationalLayers.Add(pointLayer);
}
private void _timeExtentsButton_ValueChanged(object sender, EventArgs e)
{
DateTime start;
DateTime end;
switch (_timeExtentsButton.SelectedSegment)
{
case 0:
// Hard-coded values: January 1st, 2000 - December 31st, 2000.
start = new DateTime(2000, 1, 1);
end = new DateTime(2000, 12, 31);
_myMapView.TimeExtent = new TimeExtent(start, end);
break;
case 1:
// Hard-coded values: January 1st, 2005 - December 31st, 2005.
start = new DateTime(2005, 1, 1);
end = new DateTime(2005, 12, 31);
_myMapView.TimeExtent = new TimeExtent(start, end);
break;
}
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
Initialize();
}
public override void LoadView()
{
// Create the views.
View = new UIView() { BackgroundColor = ApplicationTheme.BackgroundColor };
_myMapView = new MapView();
_myMapView.TranslatesAutoresizingMaskIntoConstraints = false;
_timeExtentsButton = new UISegmentedControl("2000", "2005")
{
BackgroundColor = ApplicationTheme.BackgroundColor,
TintColor = ApplicationTheme.ForegroundColor,
TranslatesAutoresizingMaskIntoConstraints = false,
// Clean up borders of segmented control - avoid corner pixels.
ClipsToBounds = true,
Layer = {CornerRadius = 5}
};
// Add the views.
View.AddSubviews(_myMapView, _timeExtentsButton);
// Lay out the views.
NSLayoutConstraint.ActivateConstraints(new[]
{
_myMapView.TopAnchor.ConstraintEqualTo(View.TopAnchor),
_myMapView.LeadingAnchor.ConstraintEqualTo(View.LeadingAnchor),
_myMapView.TrailingAnchor.ConstraintEqualTo(View.TrailingAnchor),
_myMapView.BottomAnchor.ConstraintEqualTo(View.BottomAnchor),
_timeExtentsButton.LeadingAnchor.ConstraintEqualTo(View.LayoutMarginsGuide.LeadingAnchor),
_timeExtentsButton.TrailingAnchor.ConstraintEqualTo(View.LayoutMarginsGuide.TrailingAnchor),
_timeExtentsButton.TopAnchor.ConstraintEqualTo(View.SafeAreaLayoutGuide.TopAnchor, 8)
});
}
public override void ViewWillAppear(bool animated)
{
base.ViewWillAppear(animated);
// Subscribe to events.
_timeExtentsButton.ValueChanged += _timeExtentsButton_ValueChanged;
}
public override void ViewDidDisappear(bool animated)
{
base.ViewDidDisappear(animated);
// Unsubscribe from events, per best practice.
_timeExtentsButton.ValueChanged -= _timeExtentsButton_ValueChanged;
}
}
}