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Change mouse icon on Macwhen performing a Drag Drop

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  • SGaistS Offline
    SGaistS Offline
    SGaist
    Lifetime Qt Champion
    wrote on last edited by
    #4

    Hi,

    Are you creating the QDrag object yourself ?

    Interested in AI ? www.idiap.ch
    Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

    J 1 Reply Last reply
    0
    • SGaistS SGaist

      Hi,

      Are you creating the QDrag object yourself ?

      J Offline
      J Offline
      jpalbertini
      wrote on last edited by
      #5

      @SGaist :
      Yes I do. I did not tried setting a pixmap to it though, i would prefer, if possible, the system icon instead of a custom one...

      ValentinMicheletV 1 Reply Last reply
      0
      • J jpalbertini

        @SGaist :
        Yes I do. I did not tried setting a pixmap to it though, i would prefer, if possible, the system icon instead of a custom one...

        ValentinMicheletV Offline
        ValentinMicheletV Offline
        ValentinMichelet
        wrote on last edited by
        #6

        @jpalbertini
        Could you show us your code please? Or better, provide a minimal code to reproduce this behavior.

        J 1 Reply Last reply
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        • J jpalbertini

          Hi
          I try to reproduce the behavior of the OSX finder: by default it moves files/directories but press ALT while doing it and it will duplicate, showing a white "+" near the mouse cursor...
          My problem is, i can't reproduce this... I always got the plus sign.
          I tried using the "setCursor" method with something like that in the dragMoveEvent:

          if (event->keyboardModifiers() == modifier)
          		setCursor(Qt::DragCopyCursor);
          	else
          		setCursor(Qt::DragMoveCursor);
          

          It does not work, and worst, it does not change when I use the standard Qt::ArrowCursor...

          I then tried changing the drop action. The only way to remove that "+" icon it to set the action to IgnoreAction, which well, does do anything on drop...

          Anymore tried to do something like that ?

          raven-worxR Offline
          raven-worxR Offline
          raven-worx
          Moderators
          wrote on last edited by
          #7

          @jpalbertini said:

          I try to reproduce the behavior of the OSX finder: by default it moves files/directories but press ALT while doing it and it will duplicate, showing a white "+" near the mouse cursor...

          The possible drop actions are defined when creating/starting the QDrag. So may it be that you only set a single drop action there?
          These drop actions can then be chosen by the user by pressing the modifier keys on the keyboard during the drag.
          Additionally the target widget also can force a specific drop target to be set once you drag over it.

          --- SUPPORT REQUESTS VIA CHAT WILL BE IGNORED ---
          If you have a question please use the forum so others can benefit from the solution in the future

          1 Reply Last reply
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          • ValentinMicheletV ValentinMichelet

            @jpalbertini
            Could you show us your code please? Or better, provide a minimal code to reproduce this behavior.

            J Offline
            J Offline
            jpalbertini
            wrote on last edited by
            #8

            @ValentinMichelet
            the drag is done this way

            QDrag * drag = new QDrag(parentWidget());
            drag->start(Qt::CopyAction | Qt::MoveAction);
            

            Then the drop is here in the dragMoveEvent

            if (event->keyboardModifiers() == modifier)
            	event->setDropAction(Qt::MoveAction);
            else
            	event->setDropAction(Qt::IgnoreAction);
            

            Nothing else is tempering with the event...

            1 Reply Last reply
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            • SGaistS Offline
              SGaistS Offline
              SGaist
              Lifetime Qt Champion
              wrote on last edited by
              #9

              Can you share the complete implementation ?

              Interested in AI ? www.idiap.ch
              Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

              J 1 Reply Last reply
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              • SGaistS SGaist

                Can you share the complete implementation ?

                J Offline
                J Offline
                jpalbertini
                wrote on last edited by
                #10

                @SGaist
                not all but here is most of it:

                Here ifs the code where we start the D&D operation:

                void QButtonSceneEditor::mouseMoveEvent(QMouseEvent* event)
                {
                	m_bIsMousePressProcessed = false;
                	if(isChecked())
                	{
                		if(!visibleRegion().contains(event->localPos().toPoint()) &&
                			event->buttons().testFlag(Qt::LeftButton))
                		{
                			dragDropManager()->addSceneButton(this);
                
                			QMimeData * mimeData = new QMimeData();
                			mimeData->setData(DVC_SCENE_MIME_DATA, 0);
                			QDrag * drag = new QDrag(parentWidget());
                			drag->setMimeData(mimeData);
                			drag->start(Qt::CopyAction | Qt::MoveAction);
                		}
                	}
                }
                

                It's an custom button we want to move internally into its parent

                void QSceneGroupEditor::dragMoveEvent(QDragMoveEvent * event)
                {
                	if (!event->mimeData()->hasFormat(DVC_SCENE_MIME_DATA))
                	{
                		event->ignore();
                		return;
                	}
                
                	QButtonScene* pScene = sceneAt(event->pos().x(), event->pos().y());
                	if (pScene)
                	{
                		bool bInTop = event->pos().y() <= pScene->geometry().center().y();
                		int iHover = m_lSceneButtons.indexOf(pScene);
                		for (int iDragged(0); iDragged < dragDropManager()->sceneButtonCount(); iDragged++)
                		{
                			QButtonScene* pButton = dragDropManager()->sceneButtonAt(iDragged);
                			if (pButton)
                			{
                				int iButton = m_lSceneButtons.indexOf(pButton);
                				if (m_lSceneButtons.contains(pButton))
                				{
                					if (iHover == iButton || (bInTop && iHover == iButton + 1) || (!bInTop && iHover == iButton - 1))
                					{
                						m_pLblSeparator->hide();
                						return;
                					}
                
                					m_pLblSeparator->show();
                					if (bInTop)
                						m_pLblSeparator->move(pScene->pos().x() - 8, pScene->pos().y() - 8);
                					else
                						m_pLblSeparator->move(pScene->pos().x() - 8, pScene->pos().y() + pScene->geometry().height() - 3);
                				}
                				else
                				{
                					m_pLblSeparator->show();
                					if (bInTop)
                						m_pLblSeparator->move(pScene->pos().x() - 8, pScene->pos().y() - 8);
                					else
                						m_pLblSeparator->move(pScene->pos().x() - 8, pScene->pos().y() + pScene->geometry().height() - 3);
                				}
                			}
                		}
                	}
                	else
                		m_pLblSeparator->hide();
                
                	Qt::KeyboardModifiers modifier = Qt::AltModifier;
                #if defined (Q_OS_MACX)
                	if (event->keyboardModifiers() == modifier)
                		event->setDropAction(Qt::MoveAction);
                	else
                		//event->setDropAction(Qt::IgnoreAction); // Works but, nothing happends...
                		event->setDropAction(Qt::CopyAction);
                #endif
                	m_pButAdd->setVisible(event->keyboardModifiers() == modifier);
                	event->accept();
                }
                

                Unless there is something I did not understand about the D&D and/or the mouse icon management, i can't change the mouse icon unless using the Qt::IgnoreAction...

                1 Reply Last reply
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                • J Offline
                  J Offline
                  jpalbertini
                  wrote on last edited by
                  #11

                  Hum, nobody ?
                  Maybe I should report a bug...

                  1 Reply Last reply
                  0
                  • SGaistS Offline
                    SGaistS Offline
                    SGaist
                    Lifetime Qt Champion
                    wrote on last edited by
                    #12

                    Are you calling acceptProposedAction where appropriate ?

                    Interested in AI ? www.idiap.ch
                    Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                    1 Reply Last reply
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                    • D Offline
                      D Offline
                      ddze
                      wrote on last edited by
                      #13

                      I believe that is OS specific.

                      1 Reply Last reply
                      0
                      • J Offline
                        J Offline
                        joorge87
                        wrote on last edited by
                        #14

                        Hi,

                        I have the same problem, did you find a way to solve it?

                        1 Reply Last reply
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