Example usage for com.vaadin.client ComponentConnector delegateCaptionHandling

List of usage examples for com.vaadin.client ComponentConnector delegateCaptionHandling

Introduction

In this page you can find the example usage for com.vaadin.client ComponentConnector delegateCaptionHandling.

Prototype

public boolean delegateCaptionHandling();

Source Link

Document

Return true if parent handles caption, false if the paintable handles the caption itself.

Usage

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

License:Apache License

/**
 * Called when the dragging a component should be initiated by both a mouse
 * down event as well as a touch start event
 *
 * FIXME This method is a BIG hack to circumvent Vaadin's very poor client
 * side API's. This will break often. Refactor once Vaadin gets a grip.
 *
 * @param event//from   ww  w  .j  a  v a2s  .c o  m
 */
protected void initiateDrag(NativeEvent event) {
    // Check that dragging is enabled
    if (dragMode == LayoutDragMode.NONE) {
        return;
    }

    // Dragging can only be done with left mouse button and no modifier keys
    if (!isMouseDragEvent(event) && !Util.isTouchEvent(event)) {
        return;
    }

    // Get target widget
    EventTarget eventTarget = event.getEventTarget();
    Element targetElement = Element.as(eventTarget);
    Widget target = WidgetUtil.findWidget(targetElement, null);

    if (isEventOnScrollBar(event)) {
        return;
    }

    // do not drag close button of TabSheet tab
    if (isElementNotDraggable(targetElement)) {
        VDragAndDropManager.get().interruptDrag();
        return;
    }

    // Abort if drag mode is caption mode and widget is not a caption
    boolean isPanelCaption = target instanceof VPanel
            && targetElement.getParentElement().getClassName().contains("v-panel-caption");
    boolean isCaption = isPanelCaption || VDragDropUtil.isCaptionOrCaptionless(target);

    if (dragMode == LayoutDragMode.CAPTION && !isCaption) {
        /*
         * Ensure target is a caption in caption mode
         */
        return;
    }

    if (dragMode == LayoutDragMode.CAPTION && isCaption) {

        /*
         * Ensure that captions in nested layouts don't get accepted if in
         * caption mode
         */

        Widget w = VDragDropUtil.getTransferableWidget(target);
        ComponentConnector c = Util.findConnectorFor(w);
        ComponentConnector parent = (ComponentConnector) c.getParent();
        if (parent.getWidget() != root) {
            return;
        }
    }

    // Create the transfarable
    VTransferable transferable = VDragDropUtil.createLayoutTransferableFromMouseDown(event, root, target);

    // Are we trying to drag the root layout
    if (transferable == null) {
        VConsole.log("Creating transferable on mouse down returned null");
        return;
    }

    // Resolve the component
    final Widget w;
    ComponentConnector c = null, parent = null;

    if (target instanceof TabCaption) {
        TabCaption tabCaption = (TabCaption) target;
        Tab tab = tabCaption.getTab();
        int tabIndex = ((ComplexPanel) tab.getParent()).getWidgetIndex(tab);
        VTabsheet tabsheet = tab.getTabsheet();

        w = tab;
        c = tabsheet.getTab(tabIndex);
        parent = Util.findConnectorFor(tabsheet);

    } else if (root instanceof VDDAccordion) {
        w = target;
        parent = Util.findConnectorFor(root);

        StackItem tab = WidgetUtil.findWidget(targetElement, StackItem.class);
        if (tab != null && root.getElement().isOrHasChild(tab.getElement())) {
            c = ((VDDAccordion) root).getTab(((VDDAccordion) root).getTabPosition(tab));
        }

    } else if (transferable.getData(Constants.TRANSFERABLE_DETAIL_COMPONENT) != null) {

        ComponentConnector connector = (ComponentConnector) transferable
                .getData(Constants.TRANSFERABLE_DETAIL_COMPONENT);
        w = connector.getWidget();
        c = Util.findConnectorFor(w);
        parent = (ComponentConnector) c.getParent();

    } else {
        // Failsafe if no widget was found
        w = root;
        c = Util.findConnectorFor(w);
        parent = (ComponentConnector) c.getParent();
        VConsole.log("Could not resolve component, using root as component");
    }

    VConsole.log("Dragging widget: " + w);
    VConsole.log(" in parent: " + parent);

    // Ensure component is draggable
    if (!VDragDropUtil.isDraggingEnabled(parent, w)) {
        VConsole.log("Dragging disabled for " + w.getClass().getName() + " in "
                + parent.getWidget().getClass().getName());
        VDragAndDropManager.get().interruptDrag();
        return;
    }

    // Announce drag start to listeners
    for (DragStartListener dl : dragStartListeners) {
        if (!dl.dragStart(w, dragMode)) {
            VDragAndDropManager.get().interruptDrag();
            return;
        }
    }

    currentDraggedWidget = w;

    // Announce to handler that we are starting a drag operation
    VDragEvent currentDragEvent = VDragAndDropManager.get().startDrag(transferable, event, true);

    /*
     * Create the drag image
     */
    boolean hasDragCaption = false;

    com.google.gwt.dom.client.Element dragImageElement = null;
    if (root instanceof VHasDragCaptionProvider) {
        VDragCaptionProvider dragCaptionProvider = ((VHasDragCaptionProvider) root).getDragCaptionProvider();
        if (dragCaptionProvider != null) {
            hasDragCaption = true;
            dragImageElement = dragCaptionProvider.getDragCaptionElement(currentDraggedWidget);
        }
    }

    if (!hasDragCaption && dragImageProvider != null) {
        dragImageElement = dragImageProvider.getDragImageElement(w);
    }

    if (dragImageElement != null) {

        // Set stylename to proxy component as well
        if (hasDragCaption) {
            dragImageElement.addClassName(ACTIVE_DRAG_CUSTOM_IMAGE_STYLENAME);
        } else {
            dragImageElement.addClassName(ACTIVE_DRAG_SOURCE_STYLENAME);
        }

    } else if (root instanceof VCssLayout) {
        /*
         * CSS Layout does not have an enclosing div so we just use the
         * component div
         */
        dragImageElement = w.getElement();

    } else if (root instanceof VTabsheet) {
        /*
         * Tabsheet should use the dragged tab as a drag image
         */
        dragImageElement = targetElement;

    } else if (root instanceof VAccordion) {
        /*
         * Accordion should use the dragged tab as a drag image
         */
        dragImageElement = targetElement;

    } else if (root instanceof VFormLayout) {
        /*
         * Dragging a component in a form layout should include the caption
         * and error indicator as well
         */
        Element rowElement = (Element) VDDFormLayout
                .getRowFromChildElement((com.google.gwt.dom.client.Element) w.getElement().cast(),
                        (com.google.gwt.dom.client.Element) root.getElement().cast())
                .cast();

        dragImageElement = rowElement;

    } else {
        /*
         * For other layouts we just use the target element;
         */
        dragImageElement = w.getElement();
    }

    Element clone;
    if (hasDragCaption) {
        currentDragEvent.setDragImage(dragImageElement);
        clone = dragImageElement;
    } else {
        currentDragEvent.createDragImage(dragImageElement, true);
        clone = currentDragEvent.getDragImage();
    }

    assert (clone != null);

    // Lock drag image dimensions
    if (!hasDragCaption) {
        clone.getStyle().setWidth(dragImageElement.getOffsetWidth(), Style.Unit.PX);
        clone.getStyle().setHeight(dragImageElement.getOffsetHeight(), Style.Unit.PX);
    }

    if (c != null && c.delegateCaptionHandling() && !(root instanceof VTabsheet)
            && !(root instanceof VAccordion)) {
        /*
         * Captions are not being dragged with the widget since they are
         * separate. Manually add a clone of the caption to the drag image.
         */
        if (target instanceof VCaption) {
            clone.insertFirst(targetElement.cloneNode(true));
        }
    }

    if (BrowserInfo.get().isIE()) {
        // Fix IE not aligning the drag image correctly when dragging
        // layouts
        clone.getStyle().setPosition(Position.ABSOLUTE);
    }

    currentDraggedWidget.addStyleName(ACTIVE_DRAG_SOURCE_STYLENAME);

    // Listen to mouse up for cleanup
    mouseUpHandlerReg = Event.addNativePreviewHandler(new Event.NativePreviewHandler() {
        @Override
        public void onPreviewNativeEvent(NativePreviewEvent event) {
            if (event.getTypeInt() == Event.ONMOUSEUP || event.getTypeInt() == Event.ONTOUCHEND
                    || event.getTypeInt() == Event.ONTOUCHCANCEL) {
                if (mouseUpHandlerReg != null) {
                    mouseUpHandlerReg.removeHandler();
                    if (currentDraggedWidget != null) {

                        currentDraggedWidget.removeStyleName(ACTIVE_DRAG_SOURCE_STYLENAME);

                        if (dragImageProvider != null) {
                            com.google.gwt.dom.client.Element dragImageElement = dragImageProvider
                                    .getDragImageElement(currentDraggedWidget);
                            if (dragImageElement != null) {
                                dragImageElement.removeClassName(ACTIVE_DRAG_SOURCE_STYLENAME);
                            }
                        }

                        currentDraggedWidget = null;
                    }
                }

                // Ensure capturing is turned off at mouse up
                Event.releaseCapture(RootPanel.getBodyElement());
            }
        }
    });

}

From source file:fi.jasoft.dragdroplayouts.client.ui.VLayoutDragDropMouseHandler.java

License:Apache License

/**
 * Called when the dragging a component should be initiated by both a mouse
 * down event as well as a touch start event
 * /*from   ww  w .  j  a  v  a2 s.  com*/
 * FIXME This method is a BIG hack to circumvent Vaadin's very poor client
 * side API's. This will break often. Refactor once Vaadin gets a grip.
 * 
 * @param event
 */
protected void initiateDrag(NativeEvent event) {
    // Check that dragging is enabled
    if (dragMode == LayoutDragMode.NONE) {
        return;
    }

    // Dragging can only be done with left mouse button and no modifier keys
    if (!isMouseDragEvent(event) && !Util.isTouchEvent(event)) {
        return;
    }

    // Get target widget
    EventTarget eventTarget = event.getEventTarget();
    Element targetElement = Element.as(eventTarget);
    Widget target = WidgetUtil.findWidget(targetElement, null);

    if (isEventOnScrollBar(event)) {
        return;
    }

    // do not drag close button of TabSheet tab
    if (isElementNotDraggable(targetElement)) {
        VDragAndDropManager.get().interruptDrag();
        return;
    }

    // Abort if drag mode is caption mode and widget is not a caption
    boolean isPanelCaption = target instanceof VPanel
            && targetElement.getParentElement().getClassName().contains("v-panel-caption");
    boolean isCaption = isPanelCaption || VDragDropUtil.isCaptionOrCaptionless(target);

    if (dragMode == LayoutDragMode.CAPTION && !isCaption) {
        /*
         * Ensure target is a caption in caption mode
         */
        return;
    }

    if (dragMode == LayoutDragMode.CAPTION && isCaption) {

        /*
         * Ensure that captions in nested layouts don't get accepted if in
         * caption mode
         */

        Widget w = VDragDropUtil.getTransferableWidget(target);
        ComponentConnector c = Util.findConnectorFor(w);
        ComponentConnector parent = (ComponentConnector) c.getParent();
        if (parent.getWidget() != root) {
            return;
        }
    }

    // Create the transfarable
    VTransferable transferable = VDragDropUtil.createLayoutTransferableFromMouseDown(event, root, target);

    // Are we trying to drag the root layout
    if (transferable == null) {
        VConsole.log("Creating transferable on mouse down returned null");
        return;
    }

    // Resolve the component
    final Widget w;
    ComponentConnector c = null, parent = null;

    if (target instanceof TabCaption) {
        TabCaption tabCaption = (TabCaption) target;
        Tab tab = tabCaption.getTab();
        int tabIndex = ((ComplexPanel) tab.getParent()).getWidgetIndex(tab);
        VTabsheet tabsheet = tab.getTabsheet();

        w = tab;
        c = tabsheet.getTab(tabIndex);
        parent = Util.findConnectorFor(tabsheet);

    } else if (root instanceof VDDAccordion) {
        w = target;
        parent = Util.findConnectorFor(root);

        StackItem tab = WidgetUtil.findWidget(targetElement, StackItem.class);
        if (tab != null && root.getElement().isOrHasChild(tab.getElement())) {
            c = ((VDDAccordion) root).getTab(((VDDAccordion) root).getTabPosition(tab));
        }

    } else if (transferable.getData(Constants.TRANSFERABLE_DETAIL_COMPONENT) != null) {

        ComponentConnector connector = (ComponentConnector) transferable
                .getData(Constants.TRANSFERABLE_DETAIL_COMPONENT);
        w = connector.getWidget();
        c = Util.findConnectorFor(w);
        parent = (ComponentConnector) c.getParent();

    } else {
        // Failsafe if no widget was found
        w = root;
        c = Util.findConnectorFor(w);
        parent = (ComponentConnector) c.getParent();
        VConsole.log("Could not resolve component, using root as component");
    }

    VConsole.log("Dragging widget: " + w);
    VConsole.log(" in parent: " + parent);

    // Ensure component is draggable
    if (!VDragDropUtil.isDraggingEnabled(parent, w)) {
        VConsole.log("Dragging disabled for " + w.getClass().getName() + " in "
                + parent.getWidget().getClass().getName());
        VDragAndDropManager.get().interruptDrag();
        return;
    }

    // Announce drag start to listeners
    for (DragStartListener dl : dragStartListeners) {
        if (!dl.dragStart(w, dragMode)) {
            VDragAndDropManager.get().interruptDrag();
            return;
        }
    }

    currentDraggedWidget = w;

    // Announce to handler that we are starting a drag operation
    VDragEvent currentDragEvent = VDragAndDropManager.get().startDrag(transferable, event, true);

    /*
     * Create the drag image
     */
    com.google.gwt.dom.client.Element dragImageElement = dragImageProvider == null ? null
            : dragImageProvider.getDragImageElement(w);

    if (dragImageElement != null) {

        // Set stylename to proxy component as well
        dragImageElement.addClassName(ACTIVE_DRAG_SOURCE_STYLENAME);

    } else if (root instanceof VCssLayout) {
        /*
         * CSS Layout does not have an enclosing div so we just use the
         * component div
         */
        dragImageElement = w.getElement();

    } else if (root instanceof VTabsheet) {
        /*
         * Tabsheet should use the dragged tab as a drag image
         */
        dragImageElement = targetElement;

    } else if (root instanceof VAccordion) {
        /*
         * Accordion should use the dragged tab as a drag image
         */
        dragImageElement = targetElement;

    } else if (root instanceof VFormLayout) {
        /*
         * Dragging a component in a form layout should include the caption
         * and error indicator as well
         */
        Element rowElement = (Element) VDDFormLayout
                .getRowFromChildElement((com.google.gwt.dom.client.Element) w.getElement().cast(),
                        (com.google.gwt.dom.client.Element) root.getElement().cast())
                .cast();

        dragImageElement = rowElement;

    } else {
        /*
         * For other layouts we just use the target element;
         */
        dragImageElement = w.getElement();
    }

    currentDragEvent.createDragImage(dragImageElement, true);
    Element clone = currentDragEvent.getDragImage();
    assert (clone != null);

    // Lock drag image dimensions
    clone.getStyle().setWidth(dragImageElement.getOffsetWidth(), Unit.PX);
    clone.getStyle().setHeight(dragImageElement.getOffsetHeight(), Unit.PX);

    if (c != null && c.delegateCaptionHandling() && !(root instanceof VTabsheet)
            && !(root instanceof VAccordion)) {
        /*
         * Captions are not being dragged with the widget since they are
         * separate. Manually add a clone of the caption to the drag image.
         */
        if (target instanceof VCaption) {
            clone.insertFirst(targetElement.cloneNode(true));
        }
    }

    if (BrowserInfo.get().isIE()) {
        // Fix IE not aligning the drag image correctly when dragging
        // layouts
        clone.getStyle().setPosition(Position.ABSOLUTE);
    }

    currentDraggedWidget.addStyleName(ACTIVE_DRAG_SOURCE_STYLENAME);

    // Listen to mouse up for cleanup
    mouseUpHandlerReg = Event.addNativePreviewHandler(new Event.NativePreviewHandler() {
        @Override
        public void onPreviewNativeEvent(NativePreviewEvent event) {
            if (event.getTypeInt() == Event.ONMOUSEUP || event.getTypeInt() == Event.ONTOUCHEND
                    || event.getTypeInt() == Event.ONTOUCHCANCEL) {
                if (mouseUpHandlerReg != null) {
                    mouseUpHandlerReg.removeHandler();
                    if (currentDraggedWidget != null) {

                        currentDraggedWidget.removeStyleName(ACTIVE_DRAG_SOURCE_STYLENAME);

                        if (dragImageProvider != null) {
                            com.google.gwt.dom.client.Element dragImageElement = dragImageProvider
                                    .getDragImageElement(currentDraggedWidget);
                            if (dragImageElement != null) {
                                dragImageElement.removeClassName(ACTIVE_DRAG_SOURCE_STYLENAME);
                            }
                        }

                        currentDraggedWidget = null;
                    }
                }

                // Ensure capturing is turned off at mouse up
                Event.releaseCapture(RootPanel.getBodyElement());
            }
        }
    });

}