Need help in SelectExt method.

[bstan]

<font face="Trebuchet MS">Good day. I trying to select an entity in my MouseMove() method, unfortunately, I found that, sometime, the SelectExt return null, even though there is line or entity under the mouse's cursor. Below are the sample.dxf, and the source code to reproduce the problem i faced.

Steps to reproduce:
[1] Run the code, and you will see the application show up.
[2] Try to move your mouse cursor, and you will found it work, by seeing the application's caption text showing "Entity selected".
[3] Scroll the horizontal scrollbar to the rightmost, and scroll the vertical scrollbar down right to the bottom.
[4] You might still find it work, when you move your cursor hover the line.
[5] Now, try to scroll your vertical scrollbar to the up-most.
[6] You should find that now the it select nothing when your mouse hover the line, and the caption text showing "Entity Not found!" .</font id="Trebuchet MS">

I would be glad if anyone could help me on this. Thanks in all advance.

DXF file (sample.dxf) to download : http://www.mediafire.com/?0ysepdtmt00

Code: Select all

using System;
using System.Drawing;
using System.Windows.Forms;
using CADImport;
using CADImport.FaceModule;

namespace SelectEntity
{
    public class Form1 : Form
    {
        private CADImage cadDrawing;

        private PictureBox pictureBox = new PictureBox();

        public Form1()
        {
            CADImportFace.EntityPropertyGrid = new PropertyGrid();

            <font color="green">// Set the windows size, and allow scrollbar.</font id="green">
            this.AutoScroll = true;
            this.Size = new Size(200, 200);
            
            <font color="green">// Create a picture box to draw the CAD Drawing.</font id="green">
            pictureBox.Size = new Size(400, 400);
            pictureBox.Paint += new PaintEventHandler(pictureBox_Paint);
            pictureBox.MouseMove += new MouseEventHandler(pictureBox_MouseMove);
            this.Controls.Add(pictureBox);

<font color="green">            // Load the CAD Drawing.</font id="green">
            cadDrawing = new CADImage();
            cadDrawing.LoadFromFile("sample.dxf");            

            cadDrawing.SelectionMode = SelectionEntityMode.Enabled;
            cadDrawing.UseDoubleBuffering = false;
        }
       
        private void pictureBox_MouseMove(object sender, MouseEventArgs e)
        {
            <font color="green">// Display the result in application's caption text.</font id="green">
            if (cadDrawing.SelectExt(e.X, e.Y, true) != null)
                this.Text = "Entity Selected";
            else
                this.Text = "Entity Not found!";            
        }       

        private void pictureBox_Paint(object sender, PaintEventArgs e)
        {
            cadDrawing.Draw(e.Graphics, new RectangleF(0, 0, 400, 400));
        }
    }
}

[support]

Hello!

Would you please send us to support@cadsofttools.com the whole demo with CADImport.dll that is used?

Sergey.

Please post questions to the forum or write to support@cadsofttools.com