| public ChangeBasemap ( string basemap ) : void | ||
| basemap | string | |
| Результат | void | |
private void ShowBasemapList()
{
// Create a new Alert Controller
UIAlertController basemapsActionSheet = UIAlertController.Create("Basemaps", "Choose a basemap", UIAlertControllerStyle.ActionSheet);
// Create an action that will apply a selected basemap
var changeBasemapAction = new Action <UIAlertAction>((axun) => { _mapViewModel.ChangeBasemap(axun.Title); });
// Add items to the action sheet to apply each basemap type
foreach (var bm in _mapViewModel.BasemapChoices)
{
UIAlertAction actionItem = UIAlertAction.Create(bm, UIAlertActionStyle.Default, changeBasemapAction);
basemapsActionSheet.AddAction(actionItem);
}
// Required for iPad - You must specify a source for the Action Sheet since it is displayed as a popover
UIPopoverPresentationController presentationPopover = basemapsActionSheet.PopoverPresentationController;
if (presentationPopover != null)
{
presentationPopover.SourceView = this.View;
presentationPopover.PermittedArrowDirections = UIPopoverArrowDirection.Up;
}
// Display the list of basemaps
this.PresentViewController(basemapsActionSheet, true, null);
}
// Click handler for basemap menu items
private void OnBasemapsMenuItemClicked(object sender, PopupMenu.MenuItemClickEventArgs e)
{
// Get the title of the selected item
var selectedBasemapType = e.Item.TitleCondensedFormatted.ToString();
// Pass the selected basemap name to the view model ChangeBasemap method
_mapViewModel.ChangeBasemap(selectedBasemapType);
}
private void OnBasemapsClicked(object sender, ItemTappedEventArgs e)
{
// Get the text (basemap name) selected in the list box
var basemapName = e.Item.ToString();
// Pass the basemap name to the view model method to change the basemap
_mapViewModel.ChangeBasemap(basemapName);
// Hide the basemap list
BasemapListBox.IsVisible = false;
}