Пример #1
0
        public LoadImagePage()
        {
            var viewModel = new LoadImageViewModel();

            viewModel.ImageDownloadFailed += HandleImageDownloadFailed;

            BindingContext = viewModel;

            Padding = new Thickness(20);

            Title = "Load Images";

            Content = new StackLayout
            {
                Children =
                {
                    new Label             {
                        Text = "Image Url"
                    },

                    new Entry             {
                        AutomationId = AutomationIdConstants.ImageUrlEntry, ReturnType = ReturnType.Go, ClearButtonVisibility = ClearButtonVisibility.WhileEditing
                    }
                    .Bind(Entry.TextProperty, nameof(LoadImageViewModel.ImageUrlEntryText))
                    .Bind(Entry.ReturnCommandProperty, nameof(LoadImageViewModel.LoadImageButtonCommand)),

                    new Button            {
                        Margin = new Thickness(0, 20, 0, 0), AutomationId = AutomationIdConstants.LoadImageButton
                    }
                    .Bind(IsEnabledProperty, nameof(LoadImageViewModel.IsLoadImageButtonEnabled))
                    .Bind(Button.CommandProperty, nameof(LoadImageViewModel.LoadImageButtonCommand))
                    .Bind(Button.TextProperty, nameof(LoadImageViewModel.DownloadImageButtonText)),

                    new Image             {
                        AutomationId = AutomationIdConstants.DownloadedImage
                    }
                    .Bind(IsVisibleProperty, nameof(LoadImageViewModel.AreImageAndClearButtonVisible))
                    .Bind(Image.SourceProperty, nameof(LoadImageViewModel.DownloadedImageSource)),

                    new Button            {
                        AutomationId = AutomationIdConstants.ClearImageButton, Text = "Clear Image From Screen"
                    }
                    .Bind(IsVisibleProperty, nameof(LoadImageViewModel.AreImageAndClearButtonVisible))
                    .Bind(Button.CommandProperty, nameof(LoadImageViewModel.ClearImageButtonCommand)),

                    new ActivityIndicator {
                        AutomationId = AutomationIdConstants.IsDownloadingActivityIndicator
                    }
                    .Bind(IsVisibleProperty, nameof(LoadImageViewModel.IsImageDownloading))
                    .Bind(ActivityIndicator.IsRunningProperty, nameof(LoadImageViewModel.IsImageDownloading))
                }
            };
        }
        public LoadImagePage()
        {
            var viewModel = new LoadImageViewModel();

            BindingContext = viewModel;

            viewModel.ImageDownloadFailed += HandleImageDownloadFailed;

            var imageUrlLabel = new Label {
                Text = "Image Url"
            };

            var imageUrlEntry = new Entry
            {
                AutomationId = AutomationIdConstants.ImageUrlEntry,
                ReturnType   = ReturnType.Go
            };

            imageUrlEntry.SetBinding(Entry.TextProperty, nameof(LoadImageViewModel.ImageUrlEntryText));
            imageUrlEntry.SetBinding(Entry.ReturnCommandProperty, nameof(LoadImageViewModel.LoadImageButtonCommand));

            var loadImageButton = new Button
            {
                Margin       = new Thickness(0, 20, 0, 0),
                AutomationId = AutomationIdConstants.LoadImageButton
            };

            loadImageButton.SetBinding(IsEnabledProperty, nameof(LoadImageViewModel.IsLoadImageButtonEnabled));
            loadImageButton.SetBinding(Button.CommandProperty, nameof(LoadImageViewModel.LoadImageButtonCommand));
            loadImageButton.SetBinding(Button.TextProperty, nameof(LoadImageViewModel.DownloadImageButtonText));

            var downloadedImage = new Image
            {
                AutomationId = AutomationIdConstants.DownloadedImage
            };

            downloadedImage.SetBinding(IsVisibleProperty, nameof(LoadImageViewModel.AreImageAndClearButtonVisible));
            downloadedImage.SetBinding(Image.SourceProperty, nameof(LoadImageViewModel.DownloadedImageSource));

            var clearImageButton = new Button
            {
                AutomationId = AutomationIdConstants.ClearImageButton,
                Text         = "Clear Image From Screen"
            };

            clearImageButton.SetBinding(IsVisibleProperty, nameof(LoadImageViewModel.AreImageAndClearButtonVisible));
            clearImageButton.SetBinding(Button.CommandProperty, nameof(LoadImageViewModel.ClearImageButtonCommand));

            var isDownloadingActivityIndicator = new ActivityIndicator
            {
                AutomationId = AutomationIdConstants.IsDownloadingActivityIndicator
            };

            isDownloadingActivityIndicator.SetBinding(IsVisibleProperty, nameof(LoadImageViewModel.IsImageDownloading));
            isDownloadingActivityIndicator.SetBinding(ActivityIndicator.IsRunningProperty, nameof(LoadImageViewModel.IsImageDownloading));

            Padding = new Thickness(20);

            Title = "Load Images";

            Content = new ScrollView
            {
                Content = new StackLayout
                {
                    Children =
                    {
                        imageUrlLabel,
                        imageUrlEntry,
                        loadImageButton,
                        downloadedImage,
                        clearImageButton,
                        isDownloadingActivityIndicator
                    }
                }
            };
        }