Displaying entity details on double click

By Balaji Ramamoorthy

On double click of an entity I wish to show its details on a custom form. Can you show me how to do this ?

Doing this involves two steps :

1) Creating a double click action which invokes a command to display the custom form.

2) Retrieving the selected entity that was double-clicked using the Implied selection.

Here is the sample code to create a double-click action that invokes the custom command :

// Add reference to AcCui.dll 
using Autodesk.AutoCAD.Customization;

[CommandMethod("RegisterDCA")]
public void RegisterDoubleClickActionMethod()
{
    string mainCuiFile
    = (string)Application.GetSystemVariable("MENUNAME") + ".cuix";
    CustomizationSection cs = new CustomizationSection(mainCuiFile);
 
    int index = 0;
    DoubleClickAction circleDoubleClickAction = null;
    foreach (DoubleClickAction dca in cs.MenuGroup.DoubleClickActions)
    {
        if (dca.Name.Equals("My Double click"))
        {
            cs.MenuGroup.DoubleClickActions.Remove(index);
            break;
        }
        index++;
    }
 
    index = 0;
    MacroGroup myMacroGroup = null;
    foreach (MacroGroup mg in cs.MenuGroup.MacroGroups)
    {
        if (mg.Name.Equals("myMacroGroup"))
        {
            cs.MenuGroup.MacroGroups.Remove(index);
            break;
        }
        index++;
    }
 
    if (circleDoubleClickAction == null && myMacroGroup == null)
    {
        DoubleClickAction dblClickAction
        = new DoubleClickAction(cs.MenuGroup, "My Double click", -1);
 
        dblClickAction.Description = "Double Click Customization";
        dblClickAction.ElementID = "EID_mydblclick";
        dblClickAction.DxfName = "Circle";
        DoubleClickCmd dblClickCmd = new DoubleClickCmd(dblClickAction);
 
        MenuMacro macroMyForm;
        MacroGroup myMacGroup
                = new MacroGroup("myMacroGroup", cs.MenuGroup);
        macroMyForm
        = myMacGroup.CreateMenuMacro
                            (
                                "testMyForm",
                                "^C^C_MyForm ",
                                "ID_MyFormCmd",
                                "My Form help",
                                MacroType.Any,
                                "TESTMYFORM_BMP",
                                "TESTMYFORM_BMP",
                                "Test MyForm label"
                            );
 
        dblClickCmd.MacroID = macroMyForm.ElementID;
        dblClickAction.DoubleClickCmd = dblClickCmd;
 
        if (cs.IsModified)
            cs.Save();
    }
}