[Qt-interest] QTreeView Drag&Drop issue

[Sylvain Pointeau]

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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