com.foc.vaadin.gui.layouts.FVDeleteDropHandler.java Source code

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Here is the source code for com.foc.vaadin.gui.layouts.FVDeleteDropHandler.java

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/*******************************************************************************
 * Copyright 2016 Antoine Nicolas SAMAHA
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License.  You may obtain a copy
 * of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations under
 * the License.
 ******************************************************************************/
package com.foc.vaadin.gui.layouts;

import com.foc.Globals;
import com.foc.vaadin.gui.FVIconFactory;
import com.vaadin.event.dd.DragAndDropEvent;
import com.vaadin.ui.Component;
import com.vaadin.ui.ComponentContainer;
import com.vaadin.ui.HasComponents;
import com.vaadin.ui.AbsoluteLayout.ComponentPosition;

import fi.jasoft.dragdroplayouts.DDAbsoluteLayout;
import fi.jasoft.dragdroplayouts.details.AbsoluteLayoutTargetDetails;
import fi.jasoft.dragdroplayouts.drophandlers.AbstractDefaultLayoutDropHandler;
import fi.jasoft.dragdroplayouts.events.LayoutBoundTransferable;

public class FVDeleteDropHandler extends AbstractDefaultLayoutDropHandler {
    @Override
    protected void handleComponentReordering(DragAndDropEvent event) {
        AbsoluteLayoutTargetDetails details = (AbsoluteLayoutTargetDetails) event.getTargetDetails();
        DDAbsoluteLayout layout = (DDAbsoluteLayout) details.getTarget();
        LayoutBoundTransferable transferable = (LayoutBoundTransferable) event.getTransferable();
        Component component = transferable.getComponent();

        // Get top-left pixel position
        int leftPixelPosition = details.getRelativeLeft();
        int topPixelPosition = details.getRelativeTop();

        ComponentPosition position = layout.getPosition(component);

        position.setLeft((float) leftPixelPosition, com.vaadin.server.Sizeable.Unit.PIXELS);
        position.setTop((float) topPixelPosition, com.vaadin.server.Sizeable.Unit.PIXELS);
    }

    /**
     * Handle a drop from another layout
     * 
     * @param event
     *            The drag and drop event
     */
    @Override
    protected void handleDropFromLayout(DragAndDropEvent event) {
        AbsoluteLayoutTargetDetails details = (AbsoluteLayoutTargetDetails) event.getTargetDetails();
        LayoutBoundTransferable transferable = (LayoutBoundTransferable) event.getTransferable();
        Component component = transferable.getComponent();
        Component source = event.getTransferable().getSourceComponent();
        DDAbsoluteLayout layout = (DDAbsoluteLayout) details.getTarget();
        int leftPixelPosition = details.getRelativeLeft();
        int topPixelPosition = details.getRelativeTop();

        // Check that we are not dragging an outer layout into an
        // inner
        // layout
        Component parent = source.getParent();
        while (parent != null) {
            parent = parent.getParent();
        }

        // remove component from source
        if (source instanceof ComponentContainer) {
            ComponentContainer sourceLayout = (ComponentContainer) source;
            sourceLayout.removeComponent(component);
        }

        // Add component to absolute layout
        layout.addComponent(component, "left:" + leftPixelPosition + "px;top:" + topPixelPosition + "px");

        layout.removeAllComponents();
        layout.addComponent(FVIconFactory.getInstance().getFVIcon(FVIconFactory.ICON_TRASH, false));
    }

    @Override
    public Class<? extends HasComponents> getTargetLayoutType() {
        return null;
    }
}