Example usage for com.vaadin.client.ui.dd VDragEvent getElementOver

List of usage examples for com.vaadin.client.ui.dd VDragEvent getElementOver

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Introduction

In this page you can find the example usage for com.vaadin.client.ui.dd VDragEvent getElementOver.

Prototype

public com.google.gwt.user.client.Element getElementOver()

Source Link

Document

Detecting the element on which the the event is happening may be problematic during drag and drop operation.

Usage

From source file:com.haulmont.cuba.web.widgets.client.addons.dragdroplayouts.ui.accordion.VDDAccordion.java

License:Apache License

/**
 * Updates the drop details while dragging. This is needed to ensure client
 * side criterias can validate the drop location.
 * /*w  ww . j ava2  s . c o m*/
 * @param event
 *            The drag event
 */
protected void updateDragDetails(VDragEvent event) {
    if (event.getElementOver() == null) {
        return;
    }

    StackItem tab = WidgetUtil.findWidget(event.getElementOver(), StackItem.class);

    if (tab != null && getElement().isOrHasChild(tab.getElement())) {
        Map<String, Object> dropDetails = event.getDropDetails();

        int index = getTabPosition(tab);
        dropDetails.put(Constants.DROP_DETAIL_TO, index);

        VerticalDropLocation location = getDropLocation(tab, event);
        dropDetails.put(Constants.DROP_DETAIL_VERTICAL_DROP_LOCATION, location);

        MouseEventDetails details = MouseEventDetailsBuilder.buildMouseEventDetails(event.getCurrentGwtEvent(),
                getElement());
        dropDetails.put(Constants.DROP_DETAIL_MOUSE_EVENT, details.serialize());
    }
}

From source file:com.haulmont.cuba.web.widgets.client.addons.dragdroplayouts.ui.accordion.VDDAccordionDropHandler.java

License:Apache License

@Override
public void dragOver(VDragEvent drag) {

    getLayout().deEmphasis();// w  ww  .  jav  a 2 s.  com

    getLayout().updateDragDetails(drag);

    getLayout().postOverHook(drag);

    // Validate the drop
    validate(new VAcceptCallback() {
        public void accepted(VDragEvent event) {
            getLayout().emphasis(event.getElementOver(), event);
        }
    }, drag);
}

From source file:com.haulmont.cuba.web.widgets.client.addons.dragdroplayouts.ui.csslayout.VDDCssLayout.java

License:Apache License

private void updatePlaceHolderStyleProperties(VDragEvent drag) {
    int width = 0;
    int height = 0;
    String className = "";

    placeHolderElement.setClassName(DRAG_SHADOW_STYLE_NAME);

    ComponentConnector draggedConnector = (ComponentConnector) drag.getTransferable()
            .getData(Constants.TRANSFERABLE_DETAIL_COMPONENT);
    if (draggedConnector != null) {
        height = Util.getRequiredHeight(draggedConnector.getWidget());
        width = Util.getRequiredWidth(draggedConnector.getWidget());
        className = draggedConnector.getWidget().getElement().getClassName();
        className = className.replaceAll(VLayoutDragDropMouseHandler.ACTIVE_DRAG_SOURCE_STYLENAME, "");
        placeHolderElement.addClassName(className);
    } else if (drag.getElementOver() != getElement()) {
        width = 3;//w ww .  j  av  a 2s.c om
        height = drag.getElementOver().getOffsetHeight();
    }

    placeHolderElement.getStyle().setWidth(width, Unit.PX);
    placeHolderElement.getStyle().setHeight(height, Unit.PX);
}

From source file:com.haulmont.cuba.web.widgets.client.addons.dragdroplayouts.ui.csslayout.VDDCssLayout.java

License:Apache License

/**
 * Updates the drop details while dragging. This is needed to ensure client
 * side criterias can validate the drop location.
 * /*w w w.  j  a  v a  2  s .  c  o  m*/
 * @param event
 *            The drag event
 */
protected void updateDragDetails(VDragEvent event) {

    Element over = event.getElementOver();
    if (placeHolderElement.isOrHasChild(over)) {
        // Dragging over the placeholder
        return;
    }

    Widget widget = (Widget) Util.findWidget(over, null);
    if (widget == null) {
        // Null check
        return;
    }

    int offset = 0;
    int index = -1;
    for (int i = 0; i < getElement().getChildCount(); i++) {
        Element child = getElement().getChild(i).cast();
        if (child.isOrHasChild(placeHolderElement)) {
            offset--;
        } else if (child.isOrHasChild(widget.getElement())) {
            index = i + offset;
            break;
        }
    }
    event.getDropDetails().put(Constants.DROP_DETAIL_TO, index);

    /*
     * The horizontal position within the cell
     */
    event.getDropDetails().put(Constants.DROP_DETAIL_HORIZONTAL_DROP_LOCATION,
            getHorizontalDropLocation(widget, event));

    /*
     * The vertical position within the cell
     */
    event.getDropDetails().put(Constants.DROP_DETAIL_VERTICAL_DROP_LOCATION,
            getVerticalDropLocation(widget, event));

    // Add mouse event details
    MouseEventDetails details = MouseEventDetailsBuilder.buildMouseEventDetails(event.getCurrentGwtEvent(),
            getElement());
    event.getDropDetails().put(Constants.DROP_DETAIL_MOUSE_EVENT, details.serialize());
}

From source file:com.haulmont.cuba.web.widgets.client.addons.dragdroplayouts.ui.csslayout.VDDCssLayout.java

License:Apache License

public void updateDrag(VDragEvent drag) {

    if (placeHolderElement == null) {
        /*/*w w w  .  j  a  va 2 s.co m*/
         * Drag image might not have been detach due to lazy attaching in
         * the DragAndDropManager. Detach it again here if it has not been
         * detached.
         */
        attachDragImageToLayout(drag);
        return;
    }

    if (drag.getElementOver().isOrHasChild(placeHolderElement)) {
        return;
    }

    if (placeHolderElement.hasParentElement()) {
        /*
         * Remove the placeholder from the DOM so we can reposition
         */
        placeHolderElement.removeFromParent();
    }

    Widget w = Util.findWidget(drag.getElementOver(), null);

    ComponentConnector draggedConnector = (ComponentConnector) drag.getTransferable()
            .getData(Constants.TRANSFERABLE_DETAIL_COMPONENT);

    if (draggedConnector != null && w == draggedConnector.getWidget()) {
        /*
         * Dragging drag image over the placeholder should not have any
         * effect (except placeholder should be removed)
         */
        return;
    }

    if (w != null && w != this) {

        HorizontalDropLocation hl = getHorizontalDropLocation(w, drag);
        VerticalDropLocation vl = getVerticalDropLocation(w, drag);

        if (hl == HorizontalDropLocation.LEFT || vl == VerticalDropLocation.TOP) {
            Element prev = w.getElement().getPreviousSibling().cast();
            if (draggedConnector == null || prev == null
                    || !draggedConnector.getWidget().getElement().isOrHasChild(prev)) {

                w.getElement().getParentElement().insertBefore(placeHolderElement, w.getElement());

            }
        } else if (hl == HorizontalDropLocation.RIGHT || vl == VerticalDropLocation.BOTTOM) {
            Element next = w.getElement().getNextSibling().cast();
            if (draggedConnector == null || next == null
                    || !draggedConnector.getWidget().getElement().isOrHasChild(next)) {
                w.getElement().getParentElement().insertAfter(placeHolderElement, w.getElement());
            }

        } else {
            Element prev = w.getElement().getPreviousSibling().cast();
            if (draggedConnector == null || prev == null
                    || !draggedConnector.getWidget().getElement().isOrHasChild(prev)) {
                w.getElement().getParentElement().insertBefore(placeHolderElement, w.getElement());
            }
        }

    } else {
        /*
         * First child or hoovering outside of current components
         */
        getElement().appendChild(placeHolderElement);
    }

    updatePlaceHolderStyleProperties(drag);
}

From source file:com.haulmont.cuba.web.widgets.client.addons.dragdroplayouts.ui.formlayout.VDDFormLayoutDropHandler.java

License:Apache License

private Widget getTableRowWidgetFromDragEvent(VDragEvent event) {

    /**/*from   ww  w  . j ava  2s. c om*/
     * Find the widget of the row
     */
    Element e = event.getElementOver();

    if (getLayout().table.getRowCount() == 0) {
        /*
         * Empty layout
         */
        return getLayout();
    }

    /**
     * Check if element is inside one of the table widgets
     */
    for (int i = 0; i < getLayout().table.getRowCount(); i++) {
        Element caption = getLayout().table.getWidget(i, getLayout().COLUMN_CAPTION).getElement();
        Element error = getLayout().table.getWidget(i, getLayout().COLUMN_ERRORFLAG).getElement();
        Element widget = getLayout().table.getWidget(i, getLayout().COLUMN_WIDGET).getElement();
        if (caption.isOrHasChild(e) || error.isOrHasChild(e) || widget.isOrHasChild(e)) {
            return getLayout().table.getWidget(i, getLayout().COLUMN_WIDGET);
        }
    }

    /*
     * Is the element a element outside the row structure but inside the
     * layout
     */
    Element rowElement = getLayout().getRowFromChildElement(e, getLayout().getElement());
    if (rowElement != null) {
        Element tableElement = rowElement.getParentElement();
        for (int i = 0; i < tableElement.getChildCount(); i++) {
            Element r = tableElement.getChild(i).cast();
            if (r.equals(rowElement)) {
                return getLayout().table.getWidget(i, getLayout().COLUMN_WIDGET);
            }
        }
    }

    /*
     * Element was not found in rows so defaulting to the form layout
     * instead
     */
    return getLayout();
}

From source file:com.haulmont.cuba.web.widgets.client.addons.dragdroplayouts.ui.horizontallayout.VDDHorizontalLayoutDropHandler.java

License:Apache License

@Override
public boolean drop(VDragEvent drag) {

    // Un-emphasis any selections
    getLayout().emphasis(null, null);//  ww  w.java2  s  .  c om

    // Update the details
    Widget slot = getSlot(drag.getElementOver(), drag.getCurrentGwtEvent());
    getLayout().updateDragDetails(slot, drag);

    return getLayout().postDropHook(drag) && super.drop(drag);
}

From source file:com.haulmont.cuba.web.widgets.client.addons.dragdroplayouts.ui.horizontallayout.VDDHorizontalLayoutDropHandler.java

License:Apache License

@Override
public void dragOver(VDragEvent drag) {

    // Remove any emphasis
    getLayout().emphasis(null, null);//from  w  ww .  ja v  a 2  s. co  m

    Slot slot = getSlot(drag.getElementOver(), drag.getCurrentGwtEvent());

    if (slot != null) {
        getLayout().updateDragDetails(slot, drag);
    } else {
        getLayout().updateDragDetails(getLayout(), drag);
    }

    getLayout().postOverHook(drag);

    // Validate the drop
    validate(new VAcceptCallback() {
        public void accepted(VDragEvent event) {
            Slot slot = getSlot(event.getElementOver(), event.getCurrentGwtEvent());
            if (slot != null) {
                getLayout().emphasis(slot, event);
            } else {
                getLayout().emphasis(getLayout(), event);
            }
        }
    }, drag);
}

From source file:com.haulmont.cuba.web.widgets.client.addons.dragdroplayouts.ui.horizontallayout.VDDHorizontalLayoutDropHandler.java

License:Apache License

@Override
public void dragEnter(VDragEvent drag) {
    super.dragEnter(drag);
    Slot slot = getSlot(drag.getElementOver(), drag.getCurrentGwtEvent());
    if (slot != null) {
        getLayout().updateDragDetails(slot, drag);
    } else {/*from  www .  j a v a2s .co  m*/
        getLayout().updateDragDetails(getLayout(), drag);
    }

    getLayout().postEnterHook(drag);
}

From source file:com.haulmont.cuba.web.widgets.client.addons.dragdroplayouts.ui.horizontalsplitpanel.VDDHorizontalSplitPanel.java

License:Apache License

/**
 * Updates the drop details while dragging. This is needed to ensure client
 * side criterias can validate the drop location.
 * /*from   ww  w .  j ava  2  s .  com*/
 * @param event
 *            The drag event
 */
protected void updateDragDetails(VDragEvent event) {
    Element over = event.getElementOver();
    if (over == null) {
        return;
    }

    // Resolve where the drop was made
    HorizontalDropLocation location = null;
    Widget content = null;
    if (firstContainer.isOrHasChild(over)) {
        location = HorizontalDropLocation.LEFT;
        content = Util.findWidget(firstContainer, null);
    } else if (splitter.isOrHasChild(over)) {
        location = HorizontalDropLocation.CENTER;
        content = this;
    } else if (secondContainer.isOrHasChild(over)) {
        location = HorizontalDropLocation.RIGHT;
        content = Util.findWidget(secondContainer, null);
    }

    event.getDropDetails().put(Constants.DROP_DETAIL_HORIZONTAL_DROP_LOCATION, location);

    if (content != null) {
        event.getDropDetails().put(Constants.DROP_DETAIL_OVER_CLASS, content.getClass().getName());
    } else {
        event.getDropDetails().put(Constants.DROP_DETAIL_OVER_CLASS, this.getClass().getName());
    }

    // Add mouse event details
    MouseEventDetails details = MouseEventDetailsBuilder.buildMouseEventDetails(event.getCurrentGwtEvent(),
            getElement());
    event.getDropDetails().put(Constants.DROP_DETAIL_MOUSE_EVENT, details.serialize());
}