Hi,
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.
[Klaas] I think you need to make your own derived rectangle, o achieve that,
and also a the tool to draw it.
Don't know right now if there is an event to intercept exactly at that
moment.
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?
{Klaas] Very likely generated from here indirectly (see stack at that point):
void a2dRect::OnHandleEvent( a2dHandleMouseEvent& event )
else if ( event.GetMouseEvent().LeftUp() )
{
a2dCommandProcessor* cmd =
m_root->GetCommandProcessor();
a2dCommandGroup* commandgroup = cmd->CommandGroupBegin( wxT(
"rectangle edit" ) );
cmd->Submit( new a2dCommand_SetCanvasProperty( original,
PROPID_TransformMatrix, m_lworld ) );
cmd->Submit( new a2dCommand_SetCanvasProperty( original,
PROPID_Width, m_width ) );
cmd->Submit( new a2dCommand_SetCanvasProperty( original,
PROPID_Height, m_height ) );
cmd->Submit( new a2dCommand_SetCanvasProperty( original,
PROPID_Radius, m_radius ) );
cmd->CommandGroupEnd( commandgroup );
}
So when editing is finished, you could test for that in:
void a2dDrawing::OnDoEvent( a2dCommandProcessorEvent& event )
{
if ( event.GetCommand()->Modifies() )
Modify( true );
}
There the event says the command is a2dCommand_SetCanvasProperty and gives you
a pointer to it, which has a pointer the m_property and m_id, and from the
m_id, you can find the name.
>From the m_property you can find also the m_value.
So yes, you can see much at that stage.
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?
[Klaas]
Did add a property for that now, also rectangle tool, can now work with a
template object. See single2 example on how to use it.
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?
[Klaas]
Now not anymore, because of the template object, but must be derived from
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?
[Klaas] not enough if any. So really need to read the source.
I myself love this one, you can easily find what event are generated where, by
setting a break point when needed. And look at the stack.
#if wxUSE_EXCEPTIONS
void
MyApp::HandleEvent(wxEvtHandler *handler,
wxEventFunction func,
wxEvent& event) const
{
// by default, simply call the handler
(handler->*func)(event);
}
#endif
At last, I could add a signal to be emitted at the right moment.
For instance search for these, in the code, such a signal I could add when
finishing an action in a tool.
const a2dSignal a2dStTool::sig_toolComEventAddObject = wxNewId();
const a2dSignal a2dStTool::sig_toolComEventSetEditObject = wxNewId();
Regards,
Klaas
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