Re: User defined cursors, TGTooltips, Context menu titles, Pointing-down y-axes: my (ROOT) problems exposed...

Hi Giorgio,

The possibility to change the context menu title is available in the cvs head.
You can do that by:

TAnnotation *obj;
obj->IsA()->SetContextMenuTitle("Annotation Modify");

Cheers, Ilka

>-----Original Message-----
>From: owner-roottalk_at_pcroot.cern.ch
>[mailto:owner-roottalk_at_pcroot.cern.ch] On Behalf Of Giorgio De Nunzio
>Sent: Monday, October 03, 2005 9:54 AM
>To: roottalk (Mailing list discussing all aspects of the ROOT system)
>Subject: [ROOT] User defined cursors, TGTooltips, Context menu titles,
>Pointing-down y-axes: my (ROOT) problems exposed...
>
>Hi all, in particular Rene', Valeri and Bertrand, who are kindly helping
>me (Hope I am forgetting none!!) Sorry for replying so late, but I still
>have mail problems. In particular, when trying to write to the list I
>get the msg:
>
>
>
>>This is the Postfix program at host cabis.unile.it.
>>I'm sorry to have to inform you that the message returned below could
>>not be delivered to one or more destinations.
>>
>>
>...
>
>
>><roottalk_at_pcroot.cern.ch>: host cernmxlb.cern.ch[137.138.166.163] said:
>> 550-5.7.1 Relaying denied. No reverse DNS configured for IP
>>
>>
>212.189.128.35.
>
>
>> 550 See http://cern.ch/mmms/why.aspx?rdns=1&ip=212.189.128.35 for
>>
>>
>more
>
>
>> information. (in reply to MAIL FROM command)
>>
>>
>
>I have to investigate further. I am now obliged to use another mail
>server (the Telecom ADSL one), but there again strange things happen..
>
>OK, back to my ROOT questions.
>Before all, thanks for your kind interest and help!
>All of my present ROOT problems come from the same piece of code...
>
>I have defined a class, TAnnotation, which derives from TEllipse and
>TString (but the latter can, and will possibly, change): it is an empty
>circle drawn around an image detail, with a comment to be written
>somewhere.
>
>1) (TGTooltip problem) When the user moves the mouse pointer over the
>TAnnotation object, the comment must appear somewhere near the object
>(here, the TGTooltip object enters the game).
>2) (context menu) When the user right-clicks on the TAnnotation obj, a
>context menu must appear (and I'd like to put "Annotation modify" on top
>of it, instead of "TAnnotation": here is the context menu title
>question)
>3) (cursors) The user, in certain conditions, can modify the TAnnotation
>(move the circle, change its size, change the comment).
>I use a boolean data member, fLocked, to decide if the user has the
>right of modifying the TAnnotation: in this case when he/she moves the
>mouse pointer over it, standard enlarge/move handles are shown and the
>cursor is also standard (various arrows etc). If the user cannot modify
>the annotation, I want a different cursor to be shown (a user defined
>cursors, eg a padlock).
>4) (axes inversion) I'd like to invert the y axis for the image and the
>objects drawn on it.
>
>Details (figures correspond to the above list).
>
>1) Nothing new about the TGTooltip problem: I have not continued
>testing.
>The only thing I have thought is that perhaps I have to change the
>"parent"
>parameter of the tooltip, so that it is not gClient->GetRoot() but the
>frame in which the TEmbeddedCanvas (where my objects are drawn) lives. I
>do not know if I am clear enough...
>
>2) Rene' proposed to change the inheritance from TString to TNamed and
>use the SetName method. I have tried but, when compiling, I get:
>
>"Warning: multiple ambiguous inheritance TObject and TX. Cint will not
>get correct base object address"
>
>I have tried to define a simpler class and try:
>
>class TX : public TEllipse, public TNamed {
>public:
> TX() : TEllipse(), TNamed() {}
>
> ClassDef(TX ,1)
>};
>
>...
>
>ClassImp(TX)
>
>Compiling, I get the aforementioned message. Uh, perhaps I have not even
>tried to see if the context menu title changed, anyway.
>
>3) Cursors.
>I understand very well that this is not a top priority problem, so feel
>free to completely neglect it.
>
>I have written this code in my HandleEvent() method:
>
> case kMouseMotion: // shows the different cursors (arrows, cross)
> cout << "kMouseMotion\n";
>
> if (fLocked)
> gPad->SetCursor(kHand); // CURSOR CHANGE!
> else {
> px1 = gPad->XtoAbsPixel(fX1);
> py1 = gPad->YtoAbsPixel(fY1);
> Tx = Bx = px1;
> ... OMISSIS ...
> if ((TMath::Abs(px - Tx) < kMaxDiff) &&
> (TMath::Abs(py - Ty) < kMaxDiff)) { // top
>edge
> T = kTRUE;
> gPad->SetCursor(kTopSide); // CURSOR CHANGE!
> }
> else
> if ((TMath::Abs(px - Bx) < kMaxDiff) &&
> (TMath::Abs(py - By) < kMaxDiff)) { // bottom
>edge
> B = kTRUE;
> gPad->SetCursor(kBottomSide); // CURSOR CHANGE!
> ... OMISSIS ...
> else {
> INSIDE = kTRUE;
> gPad->SetCursor(kMove); // CURSOR CHANGE!
> }
> pxold = px; pyold = py;
> }
> break;
> ... OMISSIS ...
>
>The code is taken from TEllipse HandleEvent(), with some modifications.
>
>As you can see, I have set the cursor to kHand when the TEllipse cannot
>be modified, while as usual kMove, kTopSide, etc are used when fLocked
>is false and the user can modify the TAnnotation object.
>
>I simply don't like that kHand pattern: I'd like something more
>informative or nicer, eg a closed padlock.
>Just as an initial test, I have tried to #include <qcursor.h> but there
>was no such file. I'll try again and look for it: possibly I have to
>download Qt separately, or simply use the right path.
>
>4) I have not tried the sample codes sent to me by Rene' yet (thanks!).
>I remember I had already seen that code, but the inverted axes did not
>work at the time. It was a dfferent ROOT version. I'll take a look at
>the source and try to adapt it to my need.
>
>Thanks for your patience in reading all this!
>
>Ciao
>Giorgio
>
>-------------------------------------
>Dr. Giorgio De Nunzio
>
>Dipartimento di Scienza dei Materiali
>Universita' di Lecce
>
>tel. 0832 297084
>giorgio.denunzio_at_unile.it
>
>
>
>
>
Received on Mon Oct 10 2005 - 14:27:39 MEST