How can I make a grid of clickable images from a list of data in WPF?
I am a seasoned C and Java programmer, but an absolute WPF newbie.
I am creating a kiosk application that will display a list of images of products that the user will click to see product details and maybe place an order.
I am trying to structure my app with MVVM Foundation because I am used to the benefits of structure and tests.
I wonder what is the most natural way to create a grid of clickable images that will fill the screen left to right, top to bottom (or the other way round, I have no exact requirements).
Any image should be bound to an object tha开发者_开发百科t will become current and be displayed in the next screen. Thanks for your help.
OK! Listen up! Here is how you do that! :) 1) Use ItemsControl together with UniformGrid to get automatic aligment
<ItemsControl>
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<UniformGrid>
</UniformGrid>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<Button Width="50" Height="50"/>
<Button Width="50" Height="50"/>
<Button Width="50" Height="50"/>
</ItemsControl>
2) Populate ItemsControl with data from your viewmodel
<ItemsControl ItemsSource="{Binding Path=ImageList}"...
public ObservableCollection<ClickableImage> ImageList
{
get { return m_ImageList;}
}
... constructor
{
m_ImageList = new ObservableCollection<ClickableImage>();
m_ImageList.Add(new ClickableImage("image.png");
}
TADAAAA!
I have refined a little the code. Here is the namespace declaration
xmlns:vm="clr-namespace:TestSandbox.ViewModels"
the DataContext
<UserControl.DataContext>
<vm:ViewModel1/>
</UserControl.DataContext>
and the uniformGrid
<ItemsControl Name="imageList" ItemsSource="{Binding Path=Products}" BorderBrush="#FFA90606" Background="#FFE70F0F">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<UniformGrid Margin="50">
</UniformGrid>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<!-- The Image binding -->
<Image Source="{Binding Path=image}" />
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
here is the C# code in the view model
public List<Product> Products {get; set; }
public ViewModel1()
{
Products = new List<Product>();
Products.Add(MakeProduct(@"..\images\beemovie.jpg"));
Products.Add(MakeProduct(@"..\images\darkknight.jpg"));
Products.Add(MakeProduct(@"..\images\matrix.jpg"));
Products.Add(MakeProduct(@"..\images\milo.jpg"));
Products.Add(MakeProduct(@"..\images\superhero.jpg"));
Products.Add(MakeProduct(@"..\images\twilight.jpg"));
Products.Add(MakeProduct(@"..\images\xfiles.jpg"));
}
public Product MakeProduct(string path)
{
return new Product(path, MakeImage(path));
}
public BitmapImage MakeImage(string path)
{
BitmapImage bmpi = new BitmapImage();
bmpi.BeginInit();
bmpi.UriSource = new Uri(path, UriKind.Relative);
bmpi.EndInit();
return bmpi;
}
In ViewModel add ObservableList<ClickableImage> m_Images
as public property.
In XAML use ListView
for displaying ClickableImage
.
Create datatemplate for ClickableImage
with Image and raised command uppon click.
On the XAML:
<Button Command="{Binding Path=OnClickCommand}"/>
On the ViewModel:
public ICommand OnClickCommand {
get
{
return new RelayCommand(aram => this.Click(), param => this.CanClick);
}
}
public void Click() {
//i was clicked!
globalBigImageViewModel.BigImageContent = m_Image;
}
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