Add-in Callback and Enable Methods
There are two possible signatures for the callback and enable methods of menu
items and toolbar commands of SOLIDWORKS add-ins:
No Parameters in the Callback or Enable Method
Implement one callback method and one enable method for each menu item and
toolbar command in the add-in. These callback and enable methods take no
arguments.
Example:
cmdIndex0 =
cmdGroup.AddCommandItem2("CreateCube", -1, "Create a cube", "Create cube", 0,
"CreateCube", "EnableCube", mainItemID1, menuToolbarOption);
cmdIndex1 =
cmdGroup.AddCommandItem2("Show PMP", -1,
"Display sample property manager",
"Show PMP", 2, "ShowPMP",
"EnablePMP", mainItemID2, menuToolbarOption);
#Region UI Callbacks
public
void CreateCube
{
// Create Cube command code
}
public
int EnableCube
{
// Return status of the Create
Cube enablement
return
0;
}
public
void ShowPMP
{
// Show PMP command code
}
public
int EnablePMP
{
// Return status of Show PMP
enablement
return
0;
}
In the example above, one callback method and one enable method are
implemented for each command item. These methods are implemented somewhere else in the add-in, usually in the UI Callback region.
One String Parameter in the Callback or Enable Method
Implement one callback method and one enable method, each having one string
parameter. Do this when you want to use the same callback/enable method for all
of your menu items and toolbar commands. The argument in the method call
indicates which menu item or toolbar command behavior to invoke.
Example:
// Create command items,
passing to the callback and enable methods a number indicating which menu item
or toolbar command
cmdIndex0 = cmdGroup.AddCommandItem2("CreateCube",
-1, "Create a cube",
"Create cube", 0,
"CallBackFunction(1)", "EnableFunction(1)",
mainItemID1, menuToolbarOption);
cmdIndex1 = cmdGroup.AddCommandItem2("Show
PMP", -1, "Display PMP",
"Show PMP", 2,
"CallBackFunction(2)", "EnableFunction(2)",
mainItemID2, menuToolbarOption);
#Region UI Callbacks
// Single-parameter callback
method
public
void CallBackFunction(string
data)
{
int
commandType = int.Parse(data);
switch (commandType)
{
case 1:
// Create cube command code
break;
case 2:
// Show PMP command code
break;
default:
break;
}
}
// Single-parameter
enable method
public
int EnableFunction(string
data)
{
int
commandType = int.Parse(data);
int arg;
switch (commandType)
{
case 1:
// Return status of
Create Cube enablement
arg = 0;
break;
case 2:
// Return status of Show PMP enablement
arg = 1
break;
default:
arg = 0
break;
}
return arg;
}
In the example above, the same callback and enable methods are used for
multiple menu items. The parameter in the callback and enable methods
differentiates which behavior to invoke. The callback and enable
method parameters must be of data type string.
Download Using Single-Argument
Callbacks in SolidWorks Add-ins, which is a complete add-in example,
from the SOLIDWORKS API forum. You must be a SOLIDWORKS subscription customer to
access the SOLIDWORKS API forum documents.
To learn more about add-ins and their menu items and toolbars: