Using SkiaSharp with Xaml,Bindings and DataTemplates. Compatible with Xamarin Forms
Install the NuGet package SynodeTechnologies.SkiaSharp.DiagramEngine:
nuget install SynodeTechnologies.SkiaSharp.DiagramEngine
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:de="clr-namespace:SynodeTechnologies.SkiaSharp.DiagramEngine.Controls;assembly=SynodeTechnologies.SkiaSharp.DiagramEngine"
x:Class="Demos.GetStarted">
<de:Canvas>
<de:Box Width="50" Height="50" X="30" Y="30" BackgroundColor="green" />
<de:Circle Width="50" Height="50" X="130" Y="70" BackgroundColor="#FF000000" />
</de:Canvas>
</ContentPage>
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:de="clr-namespace:SynodeTechnologies.SkiaSharp.DiagramEngine.Controls;assembly=SynodeTechnologies.SkiaSharp.DiagramEngine"
xmlns:layouts="clr-namespace:SynodeTechnologies.SkiaSharp.DiagramEngine.Layouts;assembly=SynodeTechnologies.SkiaSharp.DiagramEngine"
x:Class="Demos.WithLayout">
<de:Canvas>
<de:Container>
<de:Container.Layout>
<layouts:Grid>
<layouts:Grid.ColumnDefinitions>
<layouts:ColumnDefinition Width="70"/>
<layouts:ColumnDefinition Width="Auto"/>
<layouts:ColumnDefinition Width="*"/>
<layouts:ColumnDefinition Width="Auto"/>
</layouts:Grid.ColumnDefinitions>
<layouts:Grid.RowDefinitions>
<layouts:RowDefinition Height="140"/>
<layouts:RowDefinition Height="*"/>
</layouts:Grid.RowDefinitions>
</layouts:Grid>
</de:Container.Layout>
<de:Box layouts:Grid.Column="0" BackgroundColor="green" />
<de:TextBlock Text="Hello World !" Color="black" layouts:Grid.Column="1" BackgroundColor="whitesmoke" BorderColor="black" />
<de:Oval layouts:Grid.Column="3" Width="100" BackgroundColor="blue" />
</de:Container>
</de:Canvas>
</ContentPage>
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:de="clr-namespace:SynodeTechnologies.SkiaSharp.DiagramEngine.Controls;assembly=SynodeTechnologies.SkiaSharp.DiagramEngine"
xmlns:layouts="clr-namespace:SynodeTechnologies.SkiaSharp.DiagramEngine.Layouts;assembly=SynodeTechnologies.SkiaSharp.DiagramEngine"
xmlns:touchs="clr-namespace:SynodeTechnologies.SkiaSharp.DiagramEngine.TouchListeners;assembly=SynodeTechnologies.SkiaSharp.DiagramEngine"
x:Class="Demos.TemplateItems">
<de:Canvas>
<de:Canvas.TouchListener>
<touchs:XamlCommand>
<touchs:Simple/>
</touchs:XamlCommand>
</de:Canvas.TouchListener>
<de:Container>
<de:Container.Layout>
<layouts:Grid>
<layouts:Grid.ColumnDefinitions>
<layouts:ColumnDefinition Width="*"/>
</layouts:Grid.ColumnDefinitions>
<layouts:Grid.RowDefinitions>
<layouts:RowDefinition Height="50"/>
<layouts:RowDefinition Height="*"/>
</layouts:Grid.RowDefinitions>
</layouts:Grid>
</de:Container.Layout>
<de:TextBlock Text="Add" Color="black" BackgroundColor="gray" touchs:XamlCommand.Command="{Binding AddItemCommand}" />
<de:ItemsTemplate ItemsSource="{Binding Items}" Y="30" layouts:Grid.Row="1">
<de:ItemsTemplate.Layout>
<layouts:Stack/>
</de:ItemsTemplate.Layout>
<DataTemplate>
<de:TextBlock Color="green" Text="{Binding Name}"/>
</DataTemplate>
</de:ItemsTemplate>
</de:Container>
</de:Canvas>
</ContentPage>[XamlCompilation(XamlCompilationOptions.Compile)]
public partial class TemplateItems : ContentPage
{
public class Item : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
private string name;
public string Name
{
get
{
return name;
}
set
{
name = value;
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(Name)));
}
}
}
private ObservableCollection<Item> items = new ObservableCollection<Item>();
public ObservableCollection<Item> Items
{
get
{
return items;
}
}
public ICommand AddItemCommand { get; }
public TemplateItems()
{
InitializeComponent ();
this.AddItemCommand = new Command(() =>
{
Items.Add(new Item() { Name = "Item" + Items.Count });
});
this.BindingContext = this;
}
}
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:de="clr-namespace:SynodeTechnologies.SkiaSharp.DiagramEngine.Controls;assembly=SynodeTechnologies.SkiaSharp.DiagramEngine"
xmlns:layouts="clr-namespace:SynodeTechnologies.SkiaSharp.DiagramEngine.Layouts;assembly=SynodeTechnologies.SkiaSharp.DiagramEngine"
xmlns:touchs="clr-namespace:SynodeTechnologies.SkiaSharp.DiagramEngine.TouchListeners;assembly=SynodeTechnologies.SkiaSharp.DiagramEngine"
x:Class="Demos.ZoomCanvas">
<de:ZoomCanvas x:Name="zoomCanvas">
<de:ZoomCanvas.TouchListener>
<touchs:XamlCommand>
<touchs:Simple/>
</touchs:XamlCommand>
</de:ZoomCanvas.TouchListener>
<de:ZoomCanvas.Overlay>
<de:Container>
<de:Container.Layout>
<layouts:Grid>
<layouts:Grid.ColumnDefinitions>
<layouts:ColumnDefinition Width="*"/>
<layouts:ColumnDefinition Width="100"/>
</layouts:Grid.ColumnDefinitions>
<layouts:Grid.RowDefinitions>
<layouts:RowDefinition Height="100"/>
<layouts:RowDefinition Height="100"/>
<layouts:RowDefinition Height="*"/>
</layouts:Grid.RowDefinitions>
</layouts:Grid>
</de:Container.Layout>
<de:Box BackgroundColor="black" Margin="10,10,10,10" layouts:Grid.Row="0" layouts:Grid.Column="1" touchs:XamlCommand.Command="{Binding Source={x:Reference zoomCanvas}, Path=IncrementalZoomCommand}" touchs:XamlCommand.CommandParameter="1.2">
<de:Polygon Path="M114.352,297.47l-97.509,97.501c-22.448,22.463-22.466,58.9,0,81.372c22.48,22.47,58.906,22.462,81.386,0l97.434-97.44c-16.619-9.588-32.092-21.416-46.023-35.349C135.567,329.482,123.816,313.959,114.352,297.47z
M438.242,54.94C402.814,19.514,355.699,0.005,305.594,0.005c-50.109,0-97.205,19.519-132.641,54.952c-73.148,73.147-73.148,192.156,0,265.296c35.436,35.442,82.531,54.958,132.641,54.958c50.105,0,97.206-19.517,132.635-54.95c35.449-35.423,54.969-82.53,54.969-132.644C493.197,137.502,473.678,90.387,438.242,54.94z
M403.28,285.305c-26.1,26.098-60.79,40.477-97.687,40.477c-36.897,0-71.592-14.378-97.688-40.477c-53.873-53.872-53.873-141.529,0-195.4c26.097-26.091,60.791-40.467,97.688-40.467c36.91,0,71.601,14.369,97.7,40.46c26.102,26.107,40.469,60.807,40.469,97.72C443.763,224.52,429.396,259.213,403.28,285.305z
M369.1,162.893l-38.794,0.003v-38.766c0-13.653-11.066-24.715-24.712-24.715c-13.645,0-24.717,11.062-24.717,24.715v38.769l-38.764,0.003c-13.645,0-24.716,11.069-24.716,24.715c0,13.652,11.071,24.715,24.716,24.715l38.764-0.002v38.765c0,13.654,11.072,24.717,24.717,24.717c13.646,0,24.712-11.063,24.712-24.717v-38.768l38.794-0.002c13.646,0,24.719-11.072,24.719-24.717C393.818,173.955,382.746,162.893,369.1,162.893z" BackgroundColor="white" />
</de:Box>
<de:Box BackgroundColor="black" Margin="10,10,10,10" layouts:Grid.Row="1" layouts:Grid.Column="1" touchs:XamlCommand.Command="{Binding Source={x:Reference zoomCanvas}, Path=IncrementalZoomCommand}" touchs:XamlCommand.CommandParameter="0.8">
<de:Polygon Path="M114.352,297.47l-97.509,97.501c-22.448,22.463-22.466,58.9,0,81.372c22.48,22.47,58.906,22.462,81.386,0l97.434-97.44c-16.619-9.588-32.092-21.416-46.023-35.349C135.567,329.482,123.816,313.959,114.352,297.47z
M438.242,54.94C402.814,19.514,355.699,0.005,305.594,0.005c-50.109,0-97.205,19.519-132.641,54.952c-73.148,73.147-73.148,192.156,0,265.296c35.436,35.442,82.531,54.958,132.641,54.958c50.105,0,97.206-19.517,132.635-54.95c35.449-35.423,54.969-82.53,54.969-132.644C493.197,137.502,473.678,90.387,438.242,54.94z
M403.28,285.305c-26.1,26.098-60.79,40.477-97.687,40.477c-36.897,0-71.592-14.378-97.688-40.477c-53.873-53.872-53.873-141.529,0-195.4c26.097-26.091,60.791-40.467,97.688-40.467c36.91,0,71.601,14.369,97.7,40.46c26.102,26.107,40.469,60.807,40.469,97.72C443.763,224.52,429.396,259.213,403.28,285.305z
M368.34299,166.67809 c -48.23954,0.12401 -82.13915,0.006 -126.987,0.009 -13.645,0 -24.716,11.069 -24.716,24.715 0,13.652 11.071,24.715 24.716,24.715 126.987,-0.007 0,0 126.987,-0.007 13.646,0 24.719,-11.072 24.719,-24.717 -10e-4,-13.653 -11.073,-24.715 -24.719,-24.715 z" BackgroundColor="white" />
</de:Box>
</de:Container>
</de:ZoomCanvas.Overlay>
<de:Box Width="50" Height="50" X="30" Y="30" BackgroundColor="green" />
<de:Circle Width="50" Height="50" X="130" Y="70" BackgroundColor="#FF000000" />
</de:ZoomCanvas>
</ContentPage>
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:de="clr-namespace:SynodeTechnologies.SkiaSharp.DiagramEngine.Controls;assembly=SynodeTechnologies.SkiaSharp.DiagramEngine"
xmlns:layouts="clr-namespace:SynodeTechnologies.SkiaSharp.DiagramEngine.Layouts;assembly=SynodeTechnologies.SkiaSharp.DiagramEngine"
xmlns:touchs="clr-namespace:SynodeTechnologies.SkiaSharp.DiagramEngine.TouchListeners;assembly=SynodeTechnologies.SkiaSharp.DiagramEngine"
x:Class="Demos.HierarchicalItemsTemplate">
<de:Canvas>
<de:Canvas.TouchListener>
<touchs:XamlCommand>
<touchs:Simple/>
</touchs:XamlCommand>
</de:Canvas.TouchListener>
<de:Container>
<de:Container.Layout>
<layouts:Grid>
<layouts:Grid.ColumnDefinitions>
<layouts:ColumnDefinition Width="*"/>
</layouts:Grid.ColumnDefinitions>
<layouts:Grid.RowDefinitions>
<layouts:RowDefinition Height="*"/>
</layouts:Grid.RowDefinitions>
</layouts:Grid>
</de:Container.Layout>
<de:HierarchicalItemsTemplate BindingContext="{Binding Root}" ItemsSourceSelector="Children" layouts:Grid.Row="0">
<de:HierarchicalItemsTemplate.Layout>
<layouts:HierarchicalTree VerticalSpacing="16" />
</de:HierarchicalItemsTemplate.Layout>
<DataTemplate>
<de:TextBlock Color="black" Text="{Binding Name}" BorderWidth="1" BorderColor="black" Padding="10" FontSize="32"/>
</DataTemplate>
</de:HierarchicalItemsTemplate>
</de:Container>
</de:Canvas>
</ContentPage>public partial class HierarchicalItemsTemplate : ContentPage
{
public class HierarchicalItem : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
public HierarchicalItem(string name)
{
this.name = name;
}
private string name;
public string Name
{
get
{
return name;
}
set
{
name = value;
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(Name)));
}
}
private ObservableCollection<HierarchicalItem> children = new ObservableCollection<HierarchicalItem>();
public ObservableCollection<HierarchicalItem> Children
{
get
{
return children;
}
}
}
private HierarchicalItem root;
public HierarchicalItem Root
{
get
{
return root;
}
}
public HierarchicalItemsTemplate()
{
InitializeComponent ();
root = new HierarchicalItem("Root");
root.Children.Add(new HierarchicalItem("1"));
root.Children[0].Children.Add(new HierarchicalItem("1.1"));
root.Children[0].Children.Add(new HierarchicalItem("1.2"));
root.Children[0].Children.Add(new HierarchicalItem("1.3"));
root.Children.Add(new HierarchicalItem("2"));
root.Children[1].Children.Add(new HierarchicalItem("2.1"));
root.Children[1].Children.Add(new HierarchicalItem("2.2"));
root.Children[1].Children.Add(new HierarchicalItem("2.3"));
root.Children.Add(new HierarchicalItem("Lorem ipsum dolor sit amet, consectetur adipiscing elit.\nSed non risus. Suspendisse lectus tortor, dignissim sit amet, adipiscing nec, ultricies sed, dolor."));
root.Children[2].Children.Add(new HierarchicalItem("3.1"));
root.Children[2].Children.Add(new HierarchicalItem("3.2"));
root.Children[2].Children.Add(new HierarchicalItem("3.3"));
root.Children[2].Children[0].Children.Add(new HierarchicalItem("Lorem ipsum dolor sit amet"));
this.BindingContext = this;
}
}