[Qt-interest] QTreeView Drag&Drop issue

[Malyushytsky, Alex]

Forum is not the place to report the bug.
If you want it to be noticed report it in the proper way.

http://doc.trolltech.com/4.5/bughowto.html


Regards,
    Alex

From: qt-interest-bounces at trolltech.com [mailto:qt-interest-bounces at trolltech.com] On Behalf Of Sylvain Pointeau
Sent: Saturday, August 15, 2009 9:27 AM
To: qt-interest at trolltech.com
Subject: Re: [Qt-interest] QTreeView Drag&Drop issue

The bug is also there in the QTreeWidget.
(which is somehow normal?!)
On Sat, Aug 15, 2009 at 4:12 PM, Sylvain Pointeau <sylvain.pointeau at gmail.com> wrote:
if a Qt developer reads me,
please note that you are not using the right key for copy or move an item, you are using CMD (the apple key) and the standard is ALT

please could you fix this bug for 4.6?

Cheers,
Sylvain

On Fri, Aug 14, 2009 at 8:52 PM, Sylvain Pointeau <sylvain.pointeau at gmail.com> wrote:
Hi David, Sean,

Thank you very much for your answers,

actually I just do drag & drop in the same treeview,
so I can copy or move an item,
but in any cases, I only have the (+) icon.

seems a bug for me, just wanted to ask you if it happens to you also, and if you have any workaround.
it should be anyway a built-in functionality.

Cheers,
Sylvain

On Fri, Aug 14, 2009 at 7:20 PM, David Boosalis <david.boosalis at gmail.com> wrote:
Sorry for not understanding,

In mouseMoveEvent() I got something to work (replace the  "+" pixmap)
, but not very robust.

...
QPixmap pm(myPixmap);
drag = new QDrag(this);
..
drag->setDragCursor(pm,Qt::CopyAction)

Does not with all pimxaps. For instance did not work with a null
pixmap, nor did it work with:

QPixmap pm = QCursor(Qt::PointingHandCursor).pixmap();

With a valid png pixmap it does work, so maybe make your own "pointer"
pixmap and use the setDragCursor() as above.



On Fri, Aug 14, 2009 at 9:07 AM, Murphy, Sean M.<sean.murphy at gd-ais.com> wrote:
>>  drag = new QDrag(this);
>>   drag->setPixmap(myPixmap);
>>
>> This gives me the "+" along with my icon.
>
> The original poster DOESN'T want the "+" icon.  He's trying to move an existing item from one spot in the list to another spot on the list.  He's not trying to drop a brand new item onto the list and add it.  However when he starts dragging the existing item to move it, the drag/drop system modifies the cursor to include the "+" icon, which he feels is confusing to his users since they aren't really adding a new item, they are just moving an existing item.
>
> Sean
>
>> What about the Qt demo codes, there must be a drag & drop example
>> there.  Do these work on your system ?
>>
>>
>>
>>
>> On Thu, Aug 13, 2009 at 5:39 PM, Sylvain
>> Pointeau<sylvain.pointeau at gmail.com> wrote:
>>> Hi David,
>>> Thanks for your answer,
>>> I have absolutely no problem in my code, I am using a abstractModel
>>> with my QTreeView but the thing is that the cursor is always the
>>> icon
>>> (+) even if I press the key "CMD" (to only move the item) this bug
>>> is really annoying as it show a bad indication to the users ...
>>> do you see what I mean?
>>> Cheers,
>>> Sylvain
>>> On Fri, Aug 14, 2009 at 2:22 AM, David Boosalis
>>> <david.boosalis at gmail.com>
>>> wrote:
>>>>
>>>> I have the used the following code to accept drag & drop,
>>>> somethings may not make sense to youas they relate to my code, but
>>>> it may give you some clues as to your problem.
>>>>
>>>> -David
>>>>
>>>> PS - if still having trouble, paste some of your code in a email
>>>>
>>>> setDragDropMode(QAbstractItemView::DragDrop);
>>>> setDropIndicatorShown(true);
>>>> ...
>>>>
>>>> /********************************************************************
>>>> */ void MyTreeWidget::dragEnterEvent( QDragEnterEvent *de) {
>>>>  qDebug("Drage Enter Event....");  if
>>>> (de->mimeData()->hasFormat("Student")) {    qDebug("Accept drag event
>>>> ....");    dragMode = MyEnumValue;    de->acceptProposedAction();  }
>>>>  else    qDebug("DO NOT ACCEPT"); }
>>>>
>>>> /********************************************************************
>>>> */ void MyTreeWidget::dragMoveEvent(QDragMoveEvent *dm) {
>>>>  dm->acceptProposedAction(); }
>>>>
>>>> /********************************************************************
>>>> */ void MyTreeWidget::dropEvent(QDropEvent *event) {  QStringList
>>>> strList;  QString str;  bool okay;
>>>>
>>>>
>>>>  QByteArray byteArray;
>>>>  const QMimeData *mimeData;
>>>>  .....
>>>>  // if (event->proposedAction() == Qt::CopyAction) {
>>>>  event->acceptProposedAction();
>>>>  mimeData = event->mimeData();
>>>>  if (mimeData == 0) {
>>>>      qWarning("Invalid drop - mime data = 0");
>>>>      return;
>>>>  }
>>>>  if (mimeData->hasFormat("Student")) {
>>>>
>>>>    byteArray = mimeData->data("Student");
>>>>    QDataStream ds(&byteArray,QIODevice::ReadWrite);
>>>>
>>>>    ds >> studentList;
>>>>    emit droppedStudents(studentList);
>>>>  }
>>>>  QTreeWidget::dropEvent(event);
>>>>
>>>>
>>>> On Thu, Aug 13, 2009 at 3:54 PM, Sylvain
>>>> Pointeau<sylvain.pointeau at gmail.com> wrote:
>>>>> Hello,
>>>>> I have an issue on the drag and drop for a tree view on Macosx
>>>>> The cursor is always a (+) even if we only move an item (with CMD
>>>>> pressed (should be alt by the way)) what should I do for this bug
>>>>> to be solved?
>>>>> Cheers,
>>>>> Sylvain
>





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