Examples with DragSource org.eclipse.swt.dnd.DragSource used on opensource projects

Example 31 with DragSource

use of org.eclipse.swt.dnd.DragSource in project eclipse.platform.text by eclipse.

the class AbstractTextEditor method installTextDragAndDrop.

/**
 * Installs text drag and drop on the given source viewer.
 *
 * @param viewer the viewer
 * @since 3.3
 */
protected void installTextDragAndDrop(final ISourceViewer viewer) {
    if (viewer == null || fIsTextDragAndDropInstalled)
        return;
    final IDragAndDropService dndService = getSite().getService(IDragAndDropService.class);
    if (dndService == null)
        return;
    final StyledText st = viewer.getTextWidget();
    // Install drag source
    final ISelectionProvider selectionProvider = viewer.getSelectionProvider();
    final DragSource source = new DragSource(st, DND.DROP_COPY | DND.DROP_MOVE);
    source.setTransfer(new Transfer[] { TextTransfer.getInstance() });
    source.addDragListener(new DragSourceAdapter() {

        String fSelectedText;

        Point fSelection;

        @Override
        public void dragStart(DragSourceEvent event) {
            fTextDragAndDropToken = null;
            try {
                fSelection = st.getSelection();
                event.doit = isLocationSelected(new Point(event.x, event.y));
                ISelection selection = selectionProvider.getSelection();
                if (selection instanceof ITextSelection)
                    fSelectedText = ((ITextSelection) selection).getText();
                else
                    // fallback to widget
                    fSelectedText = st.getSelectionText();
            } catch (IllegalArgumentException ex) {
                event.doit = false;
            }
        }

        private boolean isLocationSelected(Point point) {
            // FIXME: https://bugs.eclipse.org/bugs/show_bug.cgi?id=260922
            if (isBlockSelectionModeEnabled())
                return false;
            int offset = st.getOffsetAtPoint(point);
            Point p = st.getLocationAtOffset(offset);
            if (p.x > point.x)
                offset--;
            return offset >= fSelection.x && offset < fSelection.y;
        }

        @Override
        public void dragSetData(DragSourceEvent event) {
            event.data = fSelectedText;
            // Can be any non-null object
            fTextDragAndDropToken = this;
        }

        @Override
        public void dragFinished(DragSourceEvent event) {
            try {
                if (event.detail == DND.DROP_MOVE && validateEditorInputState()) {
                    Point newSelection = st.getSelection();
                    int length = fSelection.y - fSelection.x;
                    int delta = 0;
                    if (newSelection.x < fSelection.x)
                        delta = length;
                    // $NON-NLS-1$
                    st.replaceTextRange(fSelection.x + delta, length, "");
                    if (fTextDragAndDropToken == null) {
                        // Move in same editor - end compound change
                        IRewriteTarget target = getAdapter(IRewriteTarget.class);
                        if (target != null)
                            target.endCompoundChange();
                    }
                }
            } finally {
                fTextDragAndDropToken = null;
            }
        }
    });
    // Install drag target
    DropTargetListener dropTargetListener = new DropTargetAdapter() {

        private Point fSelection;

        @Override
        public void dragEnter(DropTargetEvent event) {
            fTextDragAndDropToken = null;
            fSelection = st.getSelection();
            if (event.detail == DND.DROP_DEFAULT) {
                if ((event.operations & DND.DROP_MOVE) != 0) {
                    event.detail = DND.DROP_MOVE;
                } else if ((event.operations & DND.DROP_COPY) != 0) {
                    event.detail = DND.DROP_COPY;
                } else {
                    event.detail = DND.DROP_NONE;
                }
            }
        }

        @Override
        public void dragOperationChanged(DropTargetEvent event) {
            if (event.detail == DND.DROP_DEFAULT) {
                if ((event.operations & DND.DROP_MOVE) != 0) {
                    event.detail = DND.DROP_MOVE;
                } else if ((event.operations & DND.DROP_COPY) != 0) {
                    event.detail = DND.DROP_COPY;
                } else {
                    event.detail = DND.DROP_NONE;
                }
            }
        }

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

        @Override
        public void drop(DropTargetEvent event) {
            try {
                if (fTextDragAndDropToken != null && event.detail == DND.DROP_MOVE) {
                    // Move in same editor
                    int caretOffset = st.getCaretOffset();
                    if (fSelection.x <= caretOffset && caretOffset <= fSelection.y) {
                        event.detail = DND.DROP_NONE;
                        return;
                    }
                    // Start compound change
                    IRewriteTarget target = getAdapter(IRewriteTarget.class);
                    if (target != null)
                        target.beginCompoundChange();
                }
                if (!validateEditorInputState()) {
                    event.detail = DND.DROP_NONE;
                    return;
                }
                String text = (String) event.data;
                if (isBlockSelectionModeEnabled()) {
                // FIXME fix block selection and DND
                // if (fTextDNDColumnSelection != null && fTextDragAndDropToken != null && event.detail == DND.DROP_MOVE) {
                // // DND_MOVE within same editor - remove origin before inserting
                // Rectangle newSelection= st.getColumnSelection();
                // st.replaceColumnSelection(fTextDNDColumnSelection, ""); //$NON-NLS-1$
                // st.replaceColumnSelection(newSelection, text);
                // st.setColumnSelection(newSelection.x, newSelection.y, newSelection.x + fTextDNDColumnSelection.width - fTextDNDColumnSelection.x, newSelection.y + fTextDNDColumnSelection.height - fTextDNDColumnSelection.y);
                // } else {
                // Point newSelection= st.getSelection();
                // st.insert(text);
                // IDocument document= getDocumentProvider().getDocument(getEditorInput());
                // int startLine= st.getLineAtOffset(newSelection.x);
                // int startColumn= newSelection.x - st.getOffsetAtLine(startLine);
                // int endLine= startLine + document.computeNumberOfLines(text);
                // int endColumn= startColumn + TextUtilities.indexOf(document.getLegalLineDelimiters(), text, 0)[0];
                // st.setColumnSelection(startColumn, startLine, endColumn, endLine);
                // }
                } else {
                    Point newSelection = st.getSelection();
                    try {
                        int modelOffset = widgetOffset2ModelOffset(viewer, newSelection.x);
                        viewer.getDocument().replace(modelOffset, 0, text);
                    } catch (BadLocationException e) {
                        return;
                    }
                    st.setSelectionRange(newSelection.x, text.length());
                }
            } finally {
                fTextDragAndDropToken = null;
            }
        }
    };
    dndService.addMergedDropTarget(st, DND.DROP_MOVE | DND.DROP_COPY, new Transfer[] { TextTransfer.getInstance() }, dropTargetListener);
    fIsTextDragAndDropInstalled = true;
}

Example 32 with DragSource

use of org.eclipse.swt.dnd.DragSource in project eclipse.platform.swt by eclipse.

the class Bug497705_BrowserDragDetect method setDrag.

public static void setDrag(final Browser browser) {
    Transfer[] types = new Transfer[] { TextTransfer.getInstance() };
    int operations = DND.DROP_MOVE | DND.DROP_COPY | DND.DROP_LINK;
    final DragSource source = new DragSource(browser, operations);
    source.setTransfer(types);
    source.addDragListener(new DragSourceListener() {

        @Override
        public void dragStart(DragSourceEvent event) {
            event.doit = (browser.getText().length() != 0);
            // not ran.
            System.out.println("Drag started");
        }

        @Override
        public void dragSetData(DragSourceEvent event) {
            event.data = browser.getText();
        }

        @Override
        public void dragFinished(DragSourceEvent event) {
            if (event.detail == DND.DROP_MOVE)
                browser.setText("");
        }
    });
}

Example 33 with DragSource

use of org.eclipse.swt.dnd.DragSource in project eclipse.platform.swt by eclipse.

the class DNDExample method createDragWidget.

private void createDragWidget(Composite parent) {
    parent.setLayout(new FormLayout());
    Combo combo = new Combo(parent, SWT.READ_ONLY);
    combo.setItems("Toggle Button", "Radio Button", "Checkbox", "Canvas", "Label", "List", "Table", "Tree", "Text", "StyledText", "Combo");
    combo.select(LABEL);
    dragControlType = combo.getSelectionIndex();
    dragControl = createWidget(dragControlType, parent, "Drag Source");
    combo.addSelectionListener(widgetSelectedAdapter(e -> {
        Object data = dragControl.getLayoutData();
        Composite dragParent = dragControl.getParent();
        dragControl.dispose();
        Combo c = (Combo) e.widget;
        dragControlType = c.getSelectionIndex();
        dragControl = createWidget(dragControlType, dragParent, "Drag Source");
        dragControl.setLayoutData(data);
        if (dragEnabled)
            createDragSource();
        dragParent.layout();
    }));
    Button b = new Button(parent, SWT.CHECK);
    b.setText("DragSource");
    b.addSelectionListener(widgetSelectedAdapter(e -> {
        Button b1 = (Button) e.widget;
        dragEnabled = b1.getSelection();
        if (dragEnabled) {
            createDragSource();
        } else {
            if (dragSource != null) {
                dragSource.dispose();
            }
            dragSource = null;
        }
    }));
    b.setSelection(true);
    dragEnabled = true;
    FormData data = new FormData();
    data.top = new FormAttachment(0, 10);
    data.bottom = new FormAttachment(combo, -10);
    data.left = new FormAttachment(0, 10);
    data.right = new FormAttachment(100, -10);
    dragControl.setLayoutData(data);
    data = new FormData();
    data.bottom = new FormAttachment(100, -10);
    data.left = new FormAttachment(0, 10);
    combo.setLayoutData(data);
    data = new FormData();
    data.bottom = new FormAttachment(100, -10);
    data.left = new FormAttachment(combo, 10);
    b.setLayoutData(data);
}

Example 34 with DragSource

use of org.eclipse.swt.dnd.DragSource in project eclipse.platform.swt by eclipse.

the class FileViewer method createTreeDragSource.

/**
 * Creates the Drag & Drop DragSource for items being dragged from the tree.
 *
 * @return the DragSource for the tree
 */
private DragSource createTreeDragSource(final Tree tree) {
    DragSource dragSource = new DragSource(tree, DND.DROP_MOVE | DND.DROP_COPY);
    dragSource.setTransfer(FileTransfer.getInstance());
    dragSource.addDragListener(new DragSourceListener() {

        TreeItem[] dndSelection = null;

        String[] sourceNames = null;

        @Override
        public void dragStart(DragSourceEvent event) {
            dndSelection = tree.getSelection();
            sourceNames = null;
            event.doit = dndSelection.length > 0;
            isDragging = true;
            processedDropFiles = null;
        }

        @Override
        public void dragFinished(DragSourceEvent event) {
            dragSourceHandleDragFinished(event, sourceNames);
            dndSelection = null;
            sourceNames = null;
            isDragging = false;
            processedDropFiles = null;
            handleDeferredRefresh();
        }

        @Override
        public void dragSetData(DragSourceEvent event) {
            if (dndSelection == null || dndSelection.length == 0)
                return;
            if (!FileTransfer.getInstance().isSupportedType(event.dataType))
                return;
            sourceNames = new String[dndSelection.length];
            for (int i = 0; i < dndSelection.length; i++) {
                File file = (File) dndSelection[i].getData(TREEITEMDATA_FILE);
                sourceNames[i] = file.getAbsolutePath();
            }
            event.data = sourceNames;
        }
    });
    return dragSource;
}

Example 35 with DragSource

use of org.eclipse.swt.dnd.DragSource in project eclipse.platform.swt by eclipse.

the class Bug66356_DND_move_reported_to_drag_source_even_though_cancelled method main.

public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    shell.setLayout(new FillLayout());
    Button source = new Button(shell, SWT.PUSH);
    source.setText("Source");
    DragSource dragSource = new DragSource(source, DND.DROP_MOVE);
    dragSource.setTransfer(new Transfer[] { TextTransfer.getInstance() });
    dragSource.addDragListener(new DragSourceAdapter() {

        @Override
        public void dragSetData(DragSourceEvent event) {
            event.data = "hello";
        }

        @Override
        public void dragFinished(DragSourceEvent event) {
            System.out.println("Move = " + (event.detail == DND.DROP_MOVE));
        }
    });
    Button dest = new Button(shell, SWT.PUSH);
    dest.setText("Dest");
    DropTarget dropTarget = new DropTarget(dest, DND.DROP_MOVE);
    dropTarget.setTransfer(new Transfer[] { TextTransfer.getInstance() });
    // dropTarget.addDropListener(new DropTargetAdapter() {
    // public void drop(DropTargetEvent event) {
    // event.detail = DND.DROP_NONE;
    // }
    // });
    // dropTarget.addDropListener(new DropTargetListener() {
    // 
    // @Override
    // public void dropAccept(DropTargetEvent event) {
    // // TD Auto-generated method stub
    // event.detail = DND.DROP_NONE;
    // 
    // }
    // 
    // @Override
    // public void drop(DropTargetEvent event) {
    // // TD Auto-generated method stub
    // 
    // }
    // 
    // @Override
    // public void dragOver(DropTargetEvent event) {
    // // TD Auto-generated method stub
    // 
    // }
    // 
    // @Override
    // public void dragOperationChanged(DropTargetEvent event) {
    // // TD Auto-generated method stub
    // 
    // }
    // 
    // @Override
    // public void dragLeave(DropTargetEvent event) {
    // // TD Auto-generated method stub
    // 
    // }
    // 
    // @Override
    // public void dragEnter(DropTargetEvent event) {
    // // TD Auto-generated method stub
    // 
    // }
    // });
    shell.pack();
    shell.open();
    while (!shell.isDisposed()) {
        if (!display.readAndDispatch())
            display.sleep();
    }
    display.dispose();
}