DrawingObject.CanvasItems Property

Provides access to the collection of shapes in a drawing canvas.

Namespace: DevExpress.XtraRichEdit.API.Native

Assembly: DevExpress.RichEdit.v24.2.Core.dll

NuGet Package: DevExpress.RichEdit.Core

Declaration

C#

CanvasShapeCollection CanvasItems { get; }

VB.NET

ReadOnly Property CanvasItems As CanvasShapeCollection

Property Value

Type	Description
CanvasShapeCollection	The collection of canvas items.

Remarks

Create a Drawing Canvas

Call the ShapeCollection.InsertCanvas method to add a drawing canvas to a document. The CanvasItems property returns the collection of canvas elements. Use the collection’s Add methods to add shapes, pictures, and groups to the canvas.

Note

Word Processing Document API and Rich Text Editors can change the size and location of drawing objects to fit them in the canvas.

The example below adds a drawing canvas to the document.

C#

Document document = wordProcessor.Document;
// Set the measurement unit to inches.
document.Unit = DevExpress.Office.DocumentUnit.Inch;
// Insert a drawing canvas.
Shape canvas = document.Shapes.InsertCanvas(document.Range.Start, new RectangleF(1.5f, 1f, 6f, 1.5f));
// Access the collection of canvas items. 
var canvasItems = canvas.CanvasItems;
// Add a rectangle to the canvas.
var shape1 = canvasItems.AddShape(ShapeGeometryPreset.Rectangle, new RectangleF(0f, 0f, 2f, 1.5f));
shape1.Fill.SetSolidFill(Color.FromArgb(0xA4, 0xFF, 0xFF));
shape1.Line.Color = Color.DarkGray;
shape1.Line.Thickness = 2;
// Add a picture to the canvas.
var shape2 = canvasItems.AddPicture(DocumentImageSource.FromFile("Picture_Arrow.png"), new PointF(2.1f, 0.3f));
// Add a parallelogram to the canvas.
var shape3 = canvasItems.AddShape(ShapeGeometryPreset.Parallelogram, new RectangleF(3.8f, 0f, 2f, 1.5f));
shape3.Fill.SetSolidFill(Color.FromArgb(0xFF, 0xA5, 0xA5));
shape3.Line.Color = Color.DarkGray;
shape3.Line.Thickness = 2;

VB.NET

Dim document As Document = wordProcessor.Document
' Set the measurement unit to inches.
document.Unit = DevExpress.Office.DocumentUnit.Inch
' Insert a drawing canvas.
Dim canvas As Shape = document.Shapes.InsertCanvas(document.Range.Start, New RectangleF(1.5F, 1F, 6F, 1.5F))
' Access the collection of canvas items. 
Dim canvasItems As CanvasShapeCollection = canvas.CanvasItems
' Add a rectangle to the canvas.
Dim shape1 As NestedShape = canvasItems.AddShape(ShapeGeometryPreset.Rectangle, New RectangleF(0F, 0F, 2F, 1.5F))
shape1.Fill.SetSolidFill(Color.FromArgb(&HA4, &HFF, &HFF))
shape1.Line.Color = Color.DarkGray
shape1.Line.Thickness = 2
' Add a picture to the canvas.
Dim shape2 As NestedShape = canvasItems.AddPicture(DocumentImageSource.FromFile("Picture_Arrow.png"), New PointF(2.1F, 0.3F))
' Add a parallelogram to the canvas.
Dim shape3 As NestedShape = canvasItems.AddShape(ShapeGeometryPreset.Parallelogram, New RectangleF(3.8F, 0F, 2F, 1.5F))
shape3.Fill.SetSolidFill(Color.FromArgb(&HFF, &HA5, &HA5))
shape3.Line.Color = Color.DarkGray
shape3.Line.Thickness = 2

Remove Shapes from a Drawing Canvas

Use the following methods to remove shapes from a drawing canvas:

• CanvasShapeCollection.Remove - removes the specified shape from the canvas;

• CanvasShapeCollection.RemoveAt - removes a shape with the specified index from the canvas;

• CanvasShapeCollection.Clear - removes all drawing objects from the canvas.

The following example creates a drawing canvas with three shapes and then removes the picture from the canvas:

C#

Document document = wordProcessor.Document;
// Set the measurement unit to inches.
document.Unit = DevExpress.Office.DocumentUnit.Inch;
// Insert a drawing canvas.
Shape canvas = document.Shapes.InsertCanvas(document.Range.Start);
// Specify the canvas height.
canvas.Height = 1.5f;
// Access the collection of canvas items. 
var canvasItems = canvas.CanvasItems;
// Add a rectangle to the canvas.
var shape1 = canvasItems.AddShape(ShapeGeometryPreset.Rectangle, new RectangleF(0f, 0f, 2f, 1.5f));
shape1.Fill.SetSolidFill(Color.FromArgb(0xA4, 0xFF, 0xFF));
shape1.Line.Color = Color.DarkGray;
shape1.Line.Thickness = 2;
// Add a picture to the canvas.
var shape2 = canvasItems.AddPicture(DocumentImageSource.FromFile("Picture_Arrow.png"), new PointF(2.1f, 0.3f));
// Add a parallelogram to the canvas.
var shape3 = canvasItems.AddShape(ShapeGeometryPreset.Parallelogram, new RectangleF(3.8f, 0f, 2f, 1.5f));
shape3.Fill.SetSolidFill(Color.FromArgb(0xFF, 0xA5, 0xA5));
shape3.Line.Color = Color.DarkGray;
shape3.Line.Thickness = 2;
// Remove the picture from the canvas.
canvasItems.Remove(shape2);

VB.NET

Dim document As Document = wordProcessor.Document
' Set the measurement unit to inches.
document.Unit = DevExpress.Office.DocumentUnit.Inch
' Insert a drawing canvas.
Dim canvas As Shape = document.Shapes.InsertCanvas(document.Range.Start)
' Specify the canvas height.
canvas.Height = 1.5F
' Access the collection of canvas items. 
Dim canvasItems As CanvasShapeCollection = canvas.CanvasItems
' Add a rectangle to the canvas.
Dim shape1 As NestedShape = canvasItems.AddShape(ShapeGeometryPreset.Rectangle, New RectangleF(0F, 0F, 2F, 1.5F))
shape1.Fill.SetSolidFill(Color.FromArgb(&HA4, &HFF, &HFF))
shape1.Line.Color = Color.DarkGray
shape1.Line.Thickness = 2
' Add a picture to the canvas.
Dim shape2 As NestedShape = canvasItems.AddPicture(DocumentImageSource.FromFile("Picture_Arrow.png"), New PointF(2.1F, 0.3F))
' Add a parallelogram to the canvas.
Dim shape3 As NestedShape = canvasItems.AddShape(ShapeGeometryPreset.Parallelogram, New RectangleF(3.8F, 0F, 2F, 1.5F))
shape3.Fill.SetSolidFill(Color.FromArgb(&HFF, &HA5, &HA5))
shape3.Line.Color = Color.DarkGray
shape3.Line.Thickness = 2
' Remove the picture from the canvas.
canvasItems.Remove(shape2)

Call the ShapeCollection.Remove or ShapeCollection.RemoveAt method to remove the canvas from the document.