/// <summary>
/// Initializes the visualization of the grid feature.
/// </summary>
protected virtual void InitializeGrid()
{
grid = new GridVisualCreator(gridInfo);
GraphControl.BackgroundGroup.AddChild(grid, CanvasObjectDescriptors.AlwaysDirtyInstance);
// disable the grid by default
grid.Visible = false;
}
public DragAndDropForm()
{
InitializeComponent();
description.LoadFile(new MemoryStream(Resources.description), RichTextBoxStreamType.RichText);
InitializeStylesList();
// add the visual grid
const int gridWidth = 80;
GridInfo gridInfo = new GridInfo(gridWidth);
var grid = new GridVisualCreator(gridInfo);
graphControl.BackgroundGroup.AddChild(grid, CanvasObjectDescriptors.AlwaysDirtyInstance);
// Create and configure a GraphSnapContext to enable snapping
var context = new GraphSnapContext
{
NodeToNodeDistance = 30,
NodeToEdgeDistance = 20,
SnapOrthogonalMovement = false,
SnapDistance = 10,
SnapSegmentsToSnapLines = true,
NodeGridConstraintProvider = new GridConstraintProvider <INode>(gridInfo),
BendGridConstraintProvider = new GridConstraintProvider <IBend>(gridInfo),
SnapBendsToSnapLines = true,
GridSnapType = GridSnapTypes.All
};
// Create and register a graph editor input mode for editing the graph
// in the canvas.
var editorInputMode = new GraphEditorInputMode();
editorInputMode.SnapContext = context;
editorInputMode.AllowGroupingOperations = true;
ConfigureNodeDropInputMode(editorInputMode);
// use the mode in our control
graphControl.InputMode = editorInputMode;
// Set the default node style to the style of the first item in the list of nodes
if (styleListBox.Items.Count > 0)
{
INode node = styleListBox.Items[0] as INode;
if (node != null)
{
graphControl.Graph.NodeDefaults.Style = node.Style;
}
}
graphControl.Graph.SetUndoEngineEnabled(true);
// populate the control with some nodes
CreateSampleGraph();
featuresComboBox.Items.AddRange(functionOptions);
featuresComboBox.SelectedIndex = 0;
}
private void InitializeGrid()
{
gridSnapTypeComboBox.Items.AddRange(new object[]
{
GridSnapTypes.None,
GridSnapTypes.HorizontalLines,
GridSnapTypes.VerticalLines,
GridSnapTypes.Lines,
GridSnapTypes.GridPoints,
GridSnapTypes.All,
});
gridSnapTypeComboBox.SelectedIndex = 4;
// initialize grid
gridInfo = new GridInfo {
HorizontalSpacing = 50, VerticalSpacing = 50
};
grid = new GridVisualCreator(gridInfo);
graphControl.BackgroundGroup.AddChild(grid);
snapContext.NodeGridConstraintProvider = new GridConstraintProvider <INode>(gridInfo);
snapContext.BendGridConstraintProvider = new GridConstraintProvider <IBend>(gridInfo);
GridVisible = gridButton.Checked;
GridSnapType = (GridSnapTypes)gridSnapTypeComboBox.SelectedItem;
}
/// <summary>
/// Initializes the visualization of the grid feature.
/// </summary>
private void InitializeGridVisual()
{
var grid = new GridVisualCreator(new GridInfo())
{
GridStyle = GridStyle.Lines,
Pen = new Pen(Color.FromArgb(255, 210, 210, 210), 0.1f),
VisibilityThreshold = 10,
};
graphControl.BackgroundGroup.AddChild(grid, CanvasObjectDescriptors.AlwaysDirtyInstance);
}
public DragAndDropWindow()
{
InitializeComponent();
InitializeStylesList();
// add the visual grid
const int gridWidth = 80;
GridInfo gridInfo = new GridInfo(gridWidth);
var grid = new GridVisualCreator(gridInfo);
graphControl.BackgroundGroup.AddChild(grid);
// Create and configure a GraphSnapContext to enable snapping
var context = new GraphSnapContext
{
NodeToNodeDistance = 30,
NodeToEdgeDistance = 20,
SnapOrthogonalMovement = false,
SnapDistance = 10,
SnapSegmentsToSnapLines = true,
NodeGridConstraintProvider = new GridConstraintProvider <INode>(gridInfo),
BendGridConstraintProvider = new GridConstraintProvider <IBend>(gridInfo),
SnapBendsToSnapLines = true,
GridSnapType = GridSnapTypes.All
};
// Create and register a graph editor input mode for editing the graph
// in the canvas.
var editorInputMode = new GraphEditorInputMode {
AllowGroupingOperations = true
};
editorInputMode.SnapContext = context;
editorInputMode.OrthogonalEdgeEditingContext = new OrthogonalEdgeEditingContext();
// use the style, size and labels of the currently selected palette node for newly created nodes
editorInputMode.NodeCreator = GetNodeCreator(editorInputMode.NodeCreator);
ConfigureNodeDropInputMode(editorInputMode);
// use the mode in our control
graphControl.InputMode = editorInputMode;
// Enable undo
graphControl.Graph.SetUndoEngineEnabled(true);
// populate the control with some nodes
CreateSampleGraph();
featuresComboBox.ItemsSource = functionOptions;
featuresComboBox.SelectedIndex = 0;
}
// Adds grid to the GraphControl and grid constraint provider to the snap context
protected virtual void InitializeGrid(GraphSnapContext context)
{
GridInfo gridInfo = new GridInfo {
HorizontalSpacing = 200, VerticalSpacing = 200
};
grid = new GridVisualCreator(gridInfo);
GraphControl.BackgroundGroup.AddChild(grid, CanvasObjectDescriptors.AlwaysDirtyInstance);
GraphControl.Invalidate();
GraphControl.ZoomChanged += delegate { GraphControl.Invalidate(); };
GraphControl.ViewportChanged += delegate { GraphControl.Invalidate(); };
context.NodeGridConstraintProvider = new GridConstraintProvider <INode>(gridInfo);
context.BendGridConstraintProvider = new GridConstraintProvider <IBend>(gridInfo);
}
public SnapLinesForm()
{
InitializeComponent();
description.LoadFile(new MemoryStream(Resources.description), RichTextBoxStreamType.RichText);
SetupOptions();
snapContext = new GraphSnapContext();
// intialize input mode
graphEditorInputMode = new GraphEditorInputMode()
{
AllowGroupingOperations = true,
OrthogonalEdgeEditingContext = new OrthogonalEdgeEditingContext(),
SnapContext = snapContext
};
GraphControl.InputMode = graphEditorInputMode;
GraphControl.Graph.GetDecorator().EdgeDecorator.EdgeReconnectionPortCandidateProviderDecorator.SetImplementation(
edge => true, EdgeReconnectionPortCandidateProviders.AllNodeCandidates);
// initialize grid
this.gridInfo = new GridInfo {
HorizontalSpacing = 30, VerticalSpacing = 30
};
grid = new GridVisualCreator(gridInfo);
GraphControl.BackgroundGroup.AddChild(grid);
snapContext.NodeGridConstraintProvider = new GridConstraintProvider <INode>(gridInfo);
snapContext.BendGridConstraintProvider = new GridConstraintProvider <IBend>(gridInfo);
// initialize current values
OnSnappingChanged(this, null);
OnGridHorizontalWidthChanged(this, null);
OnGridVerticalWidthChanged(this, null);
GraphControl.Invalidate();
GraphControl.ZoomChanged += delegate { UpdateGrid(); };
GraphControl.ViewportChanged += delegate { UpdateGrid(); };
InitializeGraph();
}
private void InitializeGrid()
{
// Initializes gridInfo which holds the basic information about the grid
// Sets horizontal and vertical space between grid lines
gridInfo = new GridInfo {
HorizontalSpacing = 50, VerticalSpacing = 50, Origin = new PointD(12.5, 37)
};
// Creates grid visualization and adds it to GraphControl
grid = new GridVisualCreator(gridInfo)
{
GridStyle = GridStyle.Lines, Pen = Pens.Red
};
graphControl.BackgroundGroup.AddChild(grid);
// Sets constraint provider to make nodes and bends snap to grid
graphSnapContext.NodeGridConstraintProvider = new GridConstraintProvider <INode>(gridInfo);
graphSnapContext.BendGridConstraintProvider = new GridConstraintProvider <IBend>(gridInfo);
GridVisible = gridButton.Checked;
GridSnapType = (GridSnapTypes)gridSnapTypeComboBox.SelectedItem;
}
private void OnLoaded(object source, EventArgs args)
{
snapContext = new GraphSnapContext();
// intialize input mode
graphEditorInputMode = new GraphEditorInputMode()
{
AllowGroupingOperations = true,
OrthogonalEdgeEditingContext = new OrthogonalEdgeEditingContext(),
SnapContext = snapContext
};
GraphControl.InputMode = graphEditorInputMode;
GraphControl.Graph.GetDecorator().EdgeDecorator.EdgeReconnectionPortCandidateProviderDecorator.SetImplementation(
edge => true, EdgeReconnectionPortCandidateProviders.AllNodeCandidates);
// initialize grid
this.gridInfo = new GridInfo {
HorizontalSpacing = 30, VerticalSpacing = 30
};
grid = new GridVisualCreator(gridInfo);
GraphControl.BackgroundGroup.AddChild(grid);
snapContext.NodeGridConstraintProvider = new GridConstraintProvider <INode>(gridInfo);
snapContext.BendGridConstraintProvider = new GridConstraintProvider <IBend>(gridInfo);
// initialize current values
OnSnappingChanged(this, null);
OnGridHorizontalWidthChanged(this, null);
OnGridVerticalWidthChanged(this, null);
GraphControl.Invalidate();
GraphControl.ZoomChanged += delegate { UpdateGrid(); };
GraphControl.ViewportChanged += delegate { UpdateGrid(); };
InitializeGraph();
}
