Listbox carousel - is it possible?
I'm not using a listbox and data binding at the moment, but is it possible to have a listbox work like a carousel and if so, how.
This is what I'm using a开发者_如何学Ct the moment, which only works for adding images, not through binding in a listbox... can it still be modified to position each binded canvas+image in the suggested answer?
// add images to the stage
public void addImages()
{
var itemCollection = GalleryModel.DocItemCollection;
foreach (var item in itemCollection)
{
var url = item.ImageUrl;
var image = new Image
{
Source = new BitmapImage(new Uri(url, UriKind.RelativeOrAbsolute))
};
image.Width = 90;
image.Height = 60;
// add the image
LayoutRoot.Children.Add(image);
// Add template here?
// reposition the image
posImage(image, itemCollection.IndexOf(item));
_images.Add(image);
var containingWidth = ActualWidth;
var numberofItemsShown = containingWidth/100;
if (itemCollection.IndexOf(item) < Math.Ceiling(numberofItemsShown)-1)
moveIndex(1);
}
}
// move the index
private void moveIndex(int value)
{
_target += value;
_target = Math.Max(0, _target);
_target = Math.Min(_images.Count - 1, _target);
}
// reposition the image
private void posImage(Image image , int index){
double diffFactor = index - _current;
double left = _xCenter - ((IMAGE_WIDTH + OFFSET_FACTOR) * diffFactor);
double top = _yCenter;
image.SetValue(Canvas.LeftProperty, left);
image.SetValue(Canvas.TopProperty, top);
}
You'd typically use a ListBox
for scenarios like this.
The XAML for it would look something like this:
<ListBox x:Name="ImageGalleryListBox">
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<tkt:WrapPanel />
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
<ListBox.ItemTemplate>
<DataTemplate>
<Image Source="{Binding MyImageItemUri}" Margin="8" Width="100" Height="100" />
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
You can of course template it further to make things look the way you want.
In the code-behind here or in your view model, you'd create class that has an MyImageItemUri
property and add instances of it to an ObservableCollection<T>
. You can then bind or set the collection to the ItemsSource
of the ImageGalleryListBox
. You'd create more images dynamically by simply adding more of your image items to the observable collection.
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