Example usage for org.eclipse.swt.widgets Tree toControl

Introduction

In this page you can find the example usage for org.eclipse.swt.widgets Tree toControl.

Prototype

public Point toControl(Point point) 

Source Link

Document

Returns a point which is the result of converting the argument, which is specified in display relative coordinates, to coordinates relative to the receiver.

Usage

From source file:org.eclipse.swt.examples.controlexample.TreeTab.java

@Override
protected void specialPopupMenuItems(Menu menu, Event event) {
    MenuItem item = new MenuItem(menu, SWT.PUSH);
    item.setText("getItem(Point) on mouse coordinates");
    final Tree t = (Tree) event.widget;
    menuMouseCoords = t.toControl(new Point(event.x, event.y));
    item.addSelectionListener(widgetSelectedAdapter(e -> {
        eventConsole.append("getItem(Point(" + menuMouseCoords + ")) returned: " + t.getItem(menuMouseCoords));
        eventConsole.append("\n");
    }));//www.java2s . c  o m
}

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From source file:org.eclipse.swt.examples.fileviewer.FileViewer.java

/**
 * Creates the Drag & Drop DropTarget for items being dropped onto the tree.
 *
 * @return the DropTarget for the tree//from   w  ww  .java2  s  . c  o m
 */
private DropTarget createTreeDropTarget(final Tree tree) {
    DropTarget dropTarget = new DropTarget(tree, DND.DROP_MOVE | DND.DROP_COPY);
    dropTarget.setTransfer(FileTransfer.getInstance());
    dropTarget.addDropListener(new DropTargetAdapter() {
        @Override
        public void dragEnter(DropTargetEvent event) {
            isDropping = true;
        }

        @Override
        public void dragLeave(DropTargetEvent event) {
            isDropping = false;
            handleDeferredRefresh();
        }

        @Override
        public void dragOver(DropTargetEvent event) {
            dropTargetValidate(event, getTargetFile(event));
            event.feedback |= DND.FEEDBACK_EXPAND | DND.FEEDBACK_SCROLL;
        }

        @Override
        public void drop(DropTargetEvent event) {
            File targetFile = getTargetFile(event);
            if (dropTargetValidate(event, targetFile))
                dropTargetHandleDrop(event, targetFile);
        }

        private File getTargetFile(DropTargetEvent event) {
            // Determine the target File for the drop
            TreeItem item = tree.getItem(tree.toControl(new Point(event.x, event.y)));
            File targetFile = null;
            if (item != null) {
                // We are over a particular item in the tree, use the item's file
                targetFile = (File) item.getData(TREEITEMDATA_FILE);
            }
            return targetFile;
        }
    });
    return dropTarget;
}

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From source file:SWTFileViewerDemo.java

/**
 * Creates the Drag & Drop DropTarget for items being dropped onto the tree.
 * // ww w  .  j a  va  2 s .  c  om
 * @return the DropTarget for the tree
 */
private DropTarget createTreeDropTarget(final Tree tree) {
    DropTarget dropTarget = new DropTarget(tree, DND.DROP_MOVE | DND.DROP_COPY);
    dropTarget.setTransfer(new Transfer[] { FileTransfer.getInstance() });
    dropTarget.addDropListener(new DropTargetAdapter() {
        public void dragEnter(DropTargetEvent event) {
            isDropping = true;
        }

        public void dragLeave(DropTargetEvent event) {
            isDropping = false;
            handleDeferredRefresh();
        }

        public void dragOver(DropTargetEvent event) {
            dropTargetValidate(event, getTargetFile(event));
            event.feedback |= DND.FEEDBACK_EXPAND | DND.FEEDBACK_SCROLL;
        }

        public void drop(DropTargetEvent event) {
            File targetFile = getTargetFile(event);
            if (dropTargetValidate(event, targetFile))
                dropTargetHandleDrop(event, targetFile);
        }

        private File getTargetFile(DropTargetEvent event) {
            // Determine the target File for the drop
            TreeItem item = tree.getItem(tree.toControl(new Point(event.x, event.y)));
            File targetFile = null;
            if (item != null) {
                // We are over a particular item in the tree, use the item's
                // file
                targetFile = (File) item.getData(TREEITEMDATA_FILE);
            }
            return targetFile;
        }
    });
    return dropTarget;
}

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