[fltk.general] Re: [FLTK 1.3.5] Making a draggable item - Forums

int QuickAccessItem::handle(int event) {

    if (event == FL_PUSH) {
        startDragging_ = true;
        DraggableItem::instance()->position(window()->x_root() + x(), window()->y_root() + y());
        DraggableItem::instance()->setImage(imagePath_);
        DraggableItem::instance()->handle(FL_PUSH);
        DraggableItem::instance()->show();

        // we need to return used in order to display the window above the current
        // otherwise it will display it under
        return 1;
    }

    if (startDragging_) {
        // now pass the the handle and declare that it is not our business anymore
        startDragging_ = false;
        DraggableItem::instance()->handle(event);
        return 0;
    }

    return Fl_Box::handle(event);
}

On Thursday, September 10, 2020 at 12:35:39 PM UTC+3 Catalin Poida wrote:

Hi,
I want to make an item draggable between windows.
What I am trying to make is to be able to click&drag an item from one window/TL_Window to another.

So far, I could only think about creating a window with shape and the image of the item and pass the event to it when the item is clicked.
But still encountered a few problems:
- using an png image with transparent background, how can apply the shape accordingly?
- cannot pass correctly the event of PUSH and DRAG. If I scale the draggable item to 100x100 it works, but if I scale it to 40x40, it doesn't work (need an additional click on the draggable item). I am wondering if I did something wrong or I forgot something

Was there an easier solution for creating a draggable item between windows? If not, are there any easy solutions to those problems?

Thank you,
Catatlin