引言
上节说到Nodify有三层结构,编辑器Editor,节点Node和连接组件Connection,下面就让我们来进行第一步尝试,在编辑器中添加一个节点。
在窗口中添加nodify命名空间,并添加控件。
xmlns:nodify="https://miroiu.github.io/nodify"
1、设计节点Node
一个节点工具主要包含节点的名称、功能、输出输出口等,输出输出口称连接端子(Connector)
1.1、基本单元:连接端子Connector
public class ConnectorViewModel
{
public string Title { get; set; }
}
1.2、节点Node
创建一个节点,有一个输入端子排、一个输出端子排
public class NodeViewModel
{
public string Title { get; set; }
public ObservableCollection<ConnectorViewModel> Input { get; set; } = new ObservableCollection<ConnectorViewModel>();
public ObservableCollection<ConnectorViewModel> Output { get; set; } = new ObservableCollection<ConnectorViewModel>();
}
2、编辑器Editor
编辑器:作为最外层的主要交互对象,保存所有节点
public class EditorViewModel
{
//节点集合
public ObservableCollection<NodeViewModel> Nodes { get; } = new ObservableCollection<NodeViewModel>();
public EditorViewModel()
{
//自定义节点
var welcome = new NodeViewModel
{
Title = "Welcome",
Input = new ObservableCollection<ConnectorViewModel>
{
new ConnectorViewModel
{
Title = "In"
}
},
Output = new ObservableCollection<ConnectorViewModel>
{
new ConnectorViewModel
{
Title = "Out"
}
}
};
//添加自定义节点到节点集合
Nodes.Add(welcome);
}
}
3、绑定属性
<Grid>
<nodify:NodifyEditor
Name="Editor"
ItemsSource="{Binding Nodes}">
<nodify:NodifyEditor.DataContext>
<vm:EditorViewModel />
</nodify:NodifyEditor.DataContext>
<nodify:NodifyEditor.ItemTemplate>
<DataTemplate DataType="{x:Type mod:NodeViewModel}">
<nodify:Node
Header="{Binding Title}"
Input="{Binding Input}"
Output="{Binding Output}">
<nodify:Node.InputConnectorTemplate>
<DataTemplate DataType="{x:Type mod:ConnectorViewModel}">
<nodify:NodeInput
Header="{Binding Title}"
/>
</DataTemplate>
</nodify:Node.InputConnectorTemplate>
<nodify:Node.OutputConnectorTemplate>
<DataTemplate DataType="{x:Type mod:ConnectorViewModel}">
<nodify:NodeInput
Header="{Binding Title}"
/>
</DataTemplate>
</nodify:Node.OutputConnectorTemplate>
</nodify:Node>
</DataTemplate>
</nodify:NodifyEditor.ItemTemplate>
</nodify:NodifyEditor>
</Grid>