.NET Framework 4.5.2+
.NET Framework 4.5.2+
.NET Standard 2.0+
.NET Core 3.0+
Box

PagePainter Class

Base class to implement custom drawing for layout elements.

Namespace: DevExpress.XtraRichEdit.API.Layout

Assembly: DevExpress.RichEdit.v19.2.Core.dll

Declaration

public class PagePainter
Public Class PagePainter
public class PagePainter
Public Class PagePainter
public class PagePainter
Public Class PagePainter

Remarks

To implement custom drawing, subclass the PagePainter class, override the required methods and handle the BeforePagePaint event of the Rich Text Editor to specify a custom painter using the BeforePagePaintEventArgs.Painter property of event arguments.

Examples

This code snippet illustrates the implementation of a PagePainter descendant. It draws color rectangles in place of the words and labels a floating picture with a text string drawn over it.

public class MyLayoutPainter : PagePainter
{
    public override void DrawPlainTextBox(PlainTextBox plainTextBox)
    {
        if (Form1.customDrawText == true)
        {
            Canvas.DrawRectangle(new RichEditPen(Color.FromArgb(141, 179, 226)), plainTextBox.Bounds);
        }
        else base.DrawPlainTextBox(plainTextBox);
    }
    public override void DrawFloatingPicture(LayoutFloatingPicture floatingPicture)
    {
        if (Form1.customDrawImage == true)
        {
            Rectangle bounds = floatingPicture.Bounds;
            Point startPoint = new Point(bounds.X + 10, bounds.Y + bounds.Height - 40);
            RichEditPen pEn = new RichEditPen(Color.Coral);
            pEn.Thickness = 3;
            pEn.DashStyle = RichEditDashStyle.Dash;
            Canvas.DrawEllipse(pEn, bounds);
            Canvas.DrawString("Approved", new Font("Courier New", 26), new RichEditBrush(Color.DarkMagenta), startPoint);
        }
        else
            base.DrawFloatingPicture(floatingPicture);
    }
    public override void DrawTableCell(LayoutTableCell tableCell)
    {
        if (Form1.customDrawTable == true)
        {
            Rectangle Tbounds = tableCell.Bounds;
            Rectangle tableRectangle = new Rectangle(new Point(Tbounds.X + Tbounds.Width / 2 - 10, Tbounds.Y + Tbounds.Height / 2 - 10), new Size(20, 20));
            Canvas.FillEllipse(new RichEditBrush(Color.MediumAquamarine), Canvas.ConvertToDrawingLayoutUnits(tableRectangle, DocumentLayoutUnit.Pixel));
            Canvas.DrawImage(OfficeImage.CreateImage(DevExpress.Images.ImageResourceCache.Default.GetImage("devav/people/employeeaward_16x16.png")), tableCell.Bounds, ImageSizeMode.Squeeze);
            base.DrawTableCell(tableCell);
        }
        else
            base.DrawTableCell(tableCell);
    }
    public override void DrawInlinePictureBox(InlinePictureBox inlinePictureBox)
    {
        if (Form1.customDrawPicture == true)
        {
            Rectangle Ebounds = inlinePictureBox.Bounds;
            RichEditPen pen = new RichEditPen(Color.Maroon, 2);
            pen.DashStyle = RichEditDashStyle.Dot;
            Canvas.DrawLine(pen, new Point(Ebounds.X, Ebounds.Y + Ebounds.Height), new Point(Ebounds.X + Ebounds.Width, Ebounds.Y));
            Canvas.DrawLine(pen, new Point(Ebounds.X, Ebounds.Y), new Point(Ebounds.X + Ebounds.Width, Ebounds.Y + Ebounds.Height));
            Rectangle inlineRect = new Rectangle(Ebounds.X, Ebounds.Y, Ebounds.Width, Ebounds.Height);
            Canvas.DrawRectangle(new RichEditPen(Color.Aquamarine, 4), inlineRect);
        }
        else
            base.DrawInlinePictureBox(inlinePictureBox);
    }
    public override void DrawTextBox(LayoutTextBox textBox)
    {
        if (Form1.customDrawTextBox == true)
        {
            Point[] StarPoints =
                {
            new Point(textBox.Bounds.X+textBox.Bounds.Width/2,textBox.Bounds.Y),
            new Point(textBox.Bounds.X+textBox.Bounds.Width,textBox.Bounds.Y+textBox.Bounds.Height),
            new Point(textBox.Bounds.X,textBox.Bounds.Y+textBox.Bounds.Height/2),
            new Point(textBox.Bounds.X+textBox.Bounds.Width,textBox.Bounds.Y+textBox.Bounds.Height/2),
            new Point(textBox.Bounds.X,textBox.Bounds.Y+textBox.Bounds.Height),
            new Point(textBox.Bounds.X+textBox.Bounds.Width/2,textBox.Bounds.Y)
                };
            Canvas.DrawLines(new RichEditPen(Color.HotPink, 3), StarPoints);
        }
        else
            base.DrawTextBox(textBox);
    }
    public override void DrawNumberingListWithSeparatorBox(NumberingListWithSeparatorBox numberingListWithSeparatorBox)
    {
        if (Form1.customDrawSeparator == true) Canvas.FillRectangle(new RichEditBrush(Color.DarkRed), numberingListWithSeparatorBox.Bounds);
        else base.DrawNumberingListWithSeparatorBox(numberingListWithSeparatorBox);
    }
    public override void DrawHeader(LayoutHeader header)
    {
        if (Form1.customDrawHeader == true)
        {

            Point p1 = new Point(0, 0);
            Point p2 = new Point(100, 100);
            Canvas.DrawLine(new RichEditPen(Color.Red, 5), p1, p2);
            Canvas.DrawString("Default Layout Unit", new Font("Comic Sans", 12), new RichEditBrush(Color.Red), new Point(0, 0));
            Point p3 = new Point(0, 100);
            Point p4 = new Point(100, 200);
            Canvas.DrawLine(new RichEditPen(Color.Blue, 5), p3, p4, DocumentLayoutUnit.Pixel);
            Canvas.DrawString("Layout Unit Specified", new Font("Comic Sans", 12), new RichEditBrush(Color.Blue), new Point(0, 100), DocumentLayoutUnit.Pixel);
        }
        else
            base.DrawHeader(header);
    }
    public override void DrawPage(LayoutPage page)
    {
        if (Form1.customDrawPage == true)
        {
            Rectangle inlineRect = new Rectangle(100, 100, 150, 200);
            Canvas.DrawRectangle(new RichEditPen(Color.Aquamarine, Canvas.ConvertToDrawingLayoutUnits(4, DocumentLayoutUnit.Pixel)), Canvas.ConvertToDrawingLayoutUnits(inlineRect, DocumentLayoutUnit.Pixel));

        }
        base.DrawPage(page);
    }

Inheritance

Object
PagePainter
See Also