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Firstly, your code that runs in IExtensionApplication.Initialize() has crucial error that could render your add-in dll useless (i.e. after the DLL loaded, your custom command would result in "Unknown command" error). The reason is that you do not have try...catch to wrap the code on Initialize for possible error, and in your code, an error is highly likely: by the time your DLL runs the Initialize() method, there no GUARANTEE that AutoCAD has already had RibbonControl object created, thus the first line of the code in TAddRibbon() method would fail, thus the Initialize() would error out and the DLL load fails.
The usual approach of loading custom ribbon created by code is to handle Application.Idle event in Initialize(), and in the Idle event handler to check is RibbonControl is null or not. Only proceed to load custom ribbon items after RibbonControl is reachable.
Now back to your question. When you say "switch to classical..." and "switch back..." I assume it means user switch work space. You should handle event to watch workspace change (for example, handling SystemVaraibaleChanged event for system variable "WSCURRENT"): when current workspace changes, you simply check if there is RibbonControl reachable, if yes, if your ribbon items are loaded; if not load them. Of course you need to modify/update your code so that before you create your own ribbon tab/panel, you want to check if they have already exists (or there could be even ribbon tab/panel created by others that has already used the same tab/panel name. In this case you may want to name your tab/panel differently...).
As for the menu, it would be the same as ribbon loading: you can loaded in Application.Idle event handler. Just to remember, after your custom ribbon/menu loaded in the Idle event handler, you remove the event handler.
Some pseudo code:
public void Initialize()
{
Application.Idle += LoadRibbonMenuOnIdle;
}
... ...
private void LoadRibbonMenuOnIdle(object sender, EventArgs e)
{
var ribbonControl = Autodesk.Windows.ComponentManager.Ribbon;
if (ribbonControl!=null)
{
// Load custom ribbon / menu
Application.SystemVaraibaleChanged += (o, e) =>
{
if (e.Name.ToUpper()=="WSCURRENT")
{
// Load Ribbon/Menu
}
}
Application.Idle -= LoadRibbonMenuOnIdle;
}
}
As I said in previous reply, since you might need to load your ribbon multiple times due to user changing Workspace, so your ribbon loading code should check if the custom tab/panel has already existed in the ribbon control or not.
Ah, it is a typo: the variable e has already been used in the outer code, you can change it to whatever different, such as
Application.SystemVariableChanged += (o, arg) =>
{
if (arg.Name.ToUpper() == "WSCURRENT")
{
... ...
}
}
...
Sorry, I am not aware that one can add icon to PopupMenu with AutoCAD COM API.
@phuochung_dang wrote:
Also, can you tell me more, is there a way to add an icon for the Menu with code? Currently my code only shows the content without the icon.
There are no methods in AutoCAD COM API, which add icon(s) to menu.
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YOur Application.Idle event handler LoadRibbonOnIdle(object, EventArgs) does not load the custom ribbon. It only add event handler to SystemVariableChanged event to load the custom ribbon ONLY WHEN "LWDISPLAY"(???) is changed. Why when Showing LineWeight is toggled on or off you want to load/reload the custom Ribbon? The system variable to watch SHOULD BE "WSCURRENT". That is, when WorkSpace changes, you want to make sure your dynamically created custom ribbon tab is still there. SO the code should be:
private void LoadRibbonOnIdle(object sender, EventArgs e)
{
var ribbonControl = Autodesk.Windows.ComponentManager.Ribbon;
if (ribbonControl != null)
{
// Load custom ribbon tab
RibbonDemo();
// make sure custom ribbon is loaded when Workspace changes
Application.SystemVariableChanged += (o, ev) =>
{
if (ev.Name.ToUpper() == "WSCURRENT")
{
// Load Ribbon/Menu
RibbonDemo();
}
};
Application.Idle -= LoadRibbonOnIdle;
}
}
Also, in the RibbonDemo() method, you SHOULD TEST whether the custom ribbon tab has already existed or not, and ONLY create the custom ribbon WHET IT DOES NOT EXISTS.
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