PdfViewer.GetClientPoint(PdfDocumentPosition) Method

Returns the client point corresponding to the specified PDF coordinates.

Namespace: DevExpress.XtraPdfViewer

Assembly: DevExpress.XtraPdfViewer.v21.2.dll


public PointF GetClientPoint(
    PdfDocumentPosition documentPosition


Name Type Description
documentPosition PdfDocumentPosition

A PdfDocumentPosition object.


Type Description

A PointF structure.


The PDF Viewer can draw graphics in the PDF document in the Control.Paint event handler.

In this example, the filled rectangle is drawn at any document space when you hold down the left mouse button and move it.

The PDF Viewer gets the mouse position relative to the document by calling the PdfViewer.GetDocumentPosition method in the MouseDown (when the left mouse is pressed) and MouseMove event handlers (when the mouse is moving).

To draw a filled rectangle, the RectangleF.FromLTRB method is called in the Paint event handler. The start and end client points are obtained using the document position in the PdfViewer.GetClientPoint method.

This example also shows how to draw a rectangle using the Graphics.FillRectangle method.

View Example: How to custom draw in PDF Viewer

using DevExpress.Pdf;
using System;
using System.Drawing;
using System.Windows.Forms;

namespace CustomDraw
    public partial class Form1 : Form

        public Form1()
            pdfViewer1.MouseDown += pdfViewer1_MouseDown;
            pdfViewer1.MouseMove += pdfViewer1_MouseMove;
            pdfViewer1.MouseUp += pdfViewer1_MouseUp;
            pdfViewer1.Paint += pdfViewer1_Paint;

        bool mouseButtonPressed = false;
        PdfDocumentPosition startPosition;
        PdfDocumentPosition endPosition;

        void pdfViewer1_MouseDown(object sender, MouseEventArgs e)
            if (e.Button == MouseButtons.Left)
                startPosition = pdfViewer1.GetDocumentPosition(e.Location);
                endPosition = null;
                mouseButtonPressed = true;

        void pdfViewer1_MouseMove(object sender, MouseEventArgs e)
            if (mouseButtonPressed)
                endPosition = pdfViewer1.GetDocumentPosition(e.Location);

        void pdfViewer1_MouseUp(object sender, MouseEventArgs e)
            mouseButtonPressed = false;

        void pdfViewer1_Paint(object sender, PaintEventArgs e)
            Graphics g = e.Graphics;
            g.DrawRectangle(Pens.Red, new Rectangle(150, 150, 800, 50));

            if (startPosition != null && endPosition != null)
                PointF startPoint = pdfViewer1.GetClientPoint(startPosition);
                PointF endPoint = pdfViewer1.GetClientPoint(endPosition);

                using (SolidBrush blueBrush = new SolidBrush(Color.FromArgb(128, Color.Aqua)))
                    RectangleF.FromLTRB(Math.Min(startPoint.X, endPoint.X), Math.Min(startPoint.Y, endPoint.Y),
                    Math.Max(startPoint.X, endPoint.X), Math.Max(startPoint.Y, endPoint.Y)));
See Also