Can you give me an example of using the rectangle to determine when the
creation of the rectangle is complete? What I mean is, with the code you
sent me, I get an "object added" event when the user clicks the mouse
the first time to indicate the first of the rectangle's corners. What I
need is the 2nd click which completes the rectangle. Basically, I want
to be able to show the dimensions of the rectangle once it has been
completed.
Also, I see that when a rectangle is resized, that I get 4
a2dCommandProcessorEvent "SetProperty" events, and 4 a2dDrawingEvents.
Is there a way to see what property is set?
I had previously emailed you about restricting the rectangle so that the
user cannot do skew and rotate, but now I see that a "reshape" has been
added. How do we block that?
If I make my own rectangle class, do I need to make my own rectangle
tool class so that the editor knows to use my rectangles instead of the
a2dRect?
I've tried to find a lot of these answers in the documentation, but I
have been unsuccessful. Is there somewhere in the documentation that
covers which events each class handles and emits?
Thanks again for your help!
- Mike
On 10/27/2016 4:05 PM, klaas.holwerda wrote:
> Hi Mike,
>
> How about make your own derived a2dDrawing class, and do intercept the events
> given down here:
> (first just put break points at those, to see when they are issued)
> I assume you have tools and undo redo with the commandprocessor on the
> a2dDrawing.
> You need to set that drawing to your a2dCanvas.
>
> SO in you own drawing class, you can do things like next, this at least
> should tell you that
> rectangles are added are removed.
> For change rectangles, maybe the OnChangeDrawings can helps you.
> The rect changed should have pending flag set. So iterate the objects, and
> test on that.
>
> If that is not enough, make your own derived rectangle, and via its m_root,
> you can call functions
> in your MyDRawing class.
> Like when editing is busy/done, or its pending flags gets set. See the virtual
> a2dCanvasObject::SetPending() which you can override in your own rect object.
> See the editing functionality in a2dRect, and how to get to the original
> object, and not the editcopy.
>
> Hope this helps, else mail again.
>
> Regards,
>
> Klaas
>
> void MyDrawing::OnDoEvent( a2dCommandProcessorEvent& event )
> {
> a2dCommand *command = event.GetCommand();
> const a2dCommandId* comId = command->GetCommandId();
>
> if ( ( comId == &a2dCommand_AddObject::Id ) )
> {
> a2dCanvasObject *obj = wxDynamicCast(command,
> a2dCommand_AddObject)->GetCanvasObject();
> a2dRect* rect = wxDynamicCast( obj, a2dRect );
> if (rect)
> {
> wxLogDebug( wxString::Format("Do AddObject: %s, %p",
> rect->GetClassInfo()->GetClassName(), rect) );
> }
> }
> else if ( ( comId == &a2dCommand_AddObjects::Id ) )
> {
> a2dCanvasObjectList& objlist = wxDynamicCast(command,
> a2dCommand_AddObjects)->GetObjectList();
> for( a2dCanvasObjectList::iterator iter = objlist.begin(); iter !=
> objlist.end(); ++iter )
> {
> a2dRect* rect = wxDynamicCast( (*iter).Get(), a2dRect );
> if (rect)
> {
> wxLogDebug( wxString::Format("Do AddObject: %s, %p",
> rect->GetClassInfo()->GetClassName(), rect) );
> }
>
> }
> }
> else if ( ( comId == &a2dCommand_ReleaseObject::Id ) )
> {
> a2dCanvasObject *obj = wxDynamicCast(command,
> a2dCommand_AddObject)->GetCanvasObject();
> a2dRect* rect = wxDynamicCast( obj, a2dRect );
> if (rect)
> {
> wxLogDebug( wxString::Format("Do AddObject: %s, %p",
> rect->GetClassInfo()->GetClassName(), rect) );
> }
> }
> else
> {
> //wxLogDebug( wxString::Format("Do Cmd Name: %s", comId->GetName()
> ) );
> }
> event.Skip();
> }
>
>
>
> BEGIN_EVENT_TABLE( a2dDrawing, a2dObject )
> EVT_IDLE( a2dDrawing::OnIdle )
> EVT_COM_EVENT( a2dDrawing::OnComEvent )
> EVT_NEW_CAMELEON( a2dDrawing::OnAddCameleon )
> EVT_DO( a2dDrawing::OnDoEvent )
> EVT_UNDO( a2dDrawing::OnUndoEvent )
> EVT_REDO( a2dDrawing::OnRedoEvent )
> EVT_CHANGEDMODIFY_DRAWING( a2dDrawing::OnChangeDrawings )
> END_EVENT_TABLE()
>
>
> void a2dDrawing::OnDoEvent( a2dCommandProcessorEvent& event )
> {
> if ( event.GetCommand()->Modifies() )
> Modify( true );
> }
>
> void a2dDrawing::OnRedoEvent( a2dCommandProcessorEvent& event )
> {
> if ( event.GetCommand()->Modifies() )
> Modify( true );
> }
>
> void a2dDrawing::OnUndoEvent( a2dCommandProcessorEvent& event )
> {
> if ( event.GetCommand()->Modifies() )
> Modify( false );
> }
>
> void a2dDrawing::OnChangeDrawings( a2dDrawingEvent& event )
> {
> event.Skip();
> }
>
> void a2dDrawing::Modify( bool increment )
> {
> if ( increment )
> m_documentModified++;
> else
> m_documentModified--;
>
> a2dDrawingEvent event( 0, wxEVT_CHANGEDMODIFY_DRAWING, this );
> event.SetEventObject( this );
> event.SetModified( increment ? +1 : -1 );
> if ( !ProcessEvent( event ) )
> {
> //parent is processed in ProcessEvent() already
> }
> }
>
>
>
> On 10/27/2016 12:10 AM, Mike Gibson wrote:
>> Hi Klaas,
>>
>> My IDE marked them as errors. I didn't notice that they were only warnings.
>> I got the first
>> problem fixed. BUT I'm having a lot of difficulty getting events connected
>> properly in wxArt2d. I
>> was hoping you could steer me in the right direction. Here's what I have
>> (and need):
>>
>> I have a wxDialog which has a a2dCanvas in it. I want the user to be able to
>> draw and edit
>> rectangles on the canvas, but I need to capture data about the rectangles.
>> The only things I need are:
>> - I need to know when a new rectangle is created, and need to get a pointer
>> to the rectangle.
>> - I need to know when an existing rectangle is edited (moved or resized
>> only), and be able to
>> access the new dimensions of the rectangle.
>>
>> I've tried connecting wxEVT_CANVASOBJECT_RESIZE_EVENTs to the rectangle and
>> giving the rectangle
>> an event handler function, I've tried the same giving my wxDialog class the
>> event handler
>> function. I've tried connecting many different types of events to the
>> a2dstToolContr, I've tried
>> deriving my own rectangle class and connecting events, I've tried deriving
>> my own tool control
>> from a2dstToolContr and connecting events, I've tried getting events from the
>> a2dDrawRectangleTool, and I can't get anything to work.
>>
>> How do I capture these events?
>>
>> I appreciate how responsive you are, thanks!
>> - Mike
>
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