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

Example 11 with DragSourceListener

use of org.eclipse.swt.dnd.DragSourceListener in project pentaho-kettle by pentaho.

the class RepositoryExplorerDialog method open.

public RepositoryObjectReference open() {
    debug = "opening repository explorer";
    try {
        debug = "open new independent shell";
        Shell parent = getParent();
        Display display = parent.getDisplay();
        shell = new Shell(display, SWT.DIALOG_TRIM | SWT.RESIZE | SWT.MAX | SWT.MIN);
        props.setLook(shell);
        shell.setImage(GUIResource.getInstance().getImageFolderConnections());
        shell.setText(BaseMessages.getString(PKG, "RepositoryExplorerDialog.Title") + rep.getName() + "]");
        FormLayout formLayout = new FormLayout();
        formLayout.marginWidth = Const.FORM_MARGIN;
        formLayout.marginHeight = Const.FORM_MARGIN;
        shell.setLayout(formLayout);
        // Add a small toolbar to expand/collapse all items
        // 
        ToolBar treeTb = new ToolBar(shell, SWT.HORIZONTAL | SWT.FLAT);
        props.setLook(treeTb);
        fdTreeTb = new FormData();
        fdTreeTb.left = new FormAttachment(0, 0);
        fdTreeTb.top = new FormAttachment(0, 0);
        treeTb.setLayoutData(fdTreeTb);
        // Add the items...
        // 
        exportToXML = new ToolItem(treeTb, SWT.PUSH);
        exportToXML.setImage(GUIResource.getInstance().getImageExport());
        exportToXML.setText(BaseMessages.getString(PKG, "RepositoryExplorerDialog.ToolItem.ExportToXML.Label"));
        exportToXML.setToolTipText(BaseMessages.getString(PKG, "RepositoryExplorerDialog.ToolItem.ExportToXML.Tooltip"));
        importFromXML = new ToolItem(treeTb, SWT.PUSH);
        importFromXML.setImage(GUIResource.getInstance().getImageImport());
        importFromXML.setText(BaseMessages.getString(PKG, "RepositoryExplorerDialog.ToolItem.ImportFromXML.Label"));
        importFromXML.setToolTipText(BaseMessages.getString(PKG, "RepositoryExplorerDialog.ToolItem.ImportFromXML.Tooltip"));
        new ToolItem(treeTb, SWT.SEPARATOR);
        showHideDeleted = new ToolItem(treeTb, SWT.PUSH);
        showHideDeleted.setImage(GUIResource.getInstance().getImageShowDeleted());
        showHideDeleted.setText(BaseMessages.getString(PKG, "RepositoryExplorerDialog.ToolItem.ShowDeleted.Label"));
        showHideDeleted.setToolTipText(BaseMessages.getString(PKG, "RepositoryExplorerDialog.ToolItem.ShowDeleted.Tooltip"));
        showHideDeleted.setEnabled(rep.getRepositoryMeta().getRepositoryCapabilities().supportsRevisions());
        new ToolItem(treeTb, SWT.SEPARATOR);
        expandAll = new ToolItem(treeTb, SWT.PUSH);
        expandAll.setImage(GUIResource.getInstance().getImageExpandAll());
        expandAll.setText(BaseMessages.getString(PKG, "RepositoryExplorerDialog.ToolItem.ExpandAll.Label"));
        expandAll.setToolTipText(BaseMessages.getString(PKG, "RepositoryExplorerDialog.ToolItem.ExpandAll.Tooltip"));
        collapseAll = new ToolItem(treeTb, SWT.PUSH);
        collapseAll.setImage(GUIResource.getInstance().getImageCollapseAll());
        collapseAll.setText(BaseMessages.getString(PKG, "RepositoryExplorerDialog.ToolItem.CollapseAll.Label"));
        collapseAll.setToolTipText(BaseMessages.getString(PKG, "RepositoryExplorerDialog.ToolItem.CollapseAll.Tooltip"));
        // Tree
        wTree = new Tree(shell, SWT.MULTI | SWT.BORDER);
        wTree.setHeaderVisible(true);
        props.setLook(wTree);
        // Add some columns to it as well...
        nameColumn = new TreeColumn(wTree, SWT.LEFT);
        nameColumn.setText(BaseMessages.getString(PKG, "RepositoryExplorerDialog.Column.Name"));
        nameColumn.setWidth(350);
        nameColumn.setAlignment(10);
        nameColumn.addListener(SWT.Selection, new Listener() {

            @Override
            public void handleEvent(Event e) {
                setSort(0);
            }
        });
        // No sorting on the type column just yet.
        typeColumn = new TreeColumn(wTree, SWT.LEFT);
        typeColumn.setText(BaseMessages.getString(PKG, "RepositoryExplorerDialog.Column.Type"));
        typeColumn.setWidth(100);
        typeColumn.addListener(SWT.Selection, new Listener() {

            @Override
            public void handleEvent(Event e) {
                setSort(1);
            }
        });
        userColumn = new TreeColumn(wTree, SWT.LEFT);
        userColumn.setText(BaseMessages.getString(PKG, "RepositoryExplorerDialog.Column.User"));
        userColumn.setWidth(100);
        userColumn.addListener(SWT.Selection, new Listener() {

            @Override
            public void handleEvent(Event e) {
                setSort(2);
            }
        });
        changedColumn = new TreeColumn(wTree, SWT.LEFT);
        changedColumn.setText(BaseMessages.getString(PKG, "RepositoryExplorerDialog.Column.Changed"));
        changedColumn.setWidth(120);
        changedColumn.addListener(SWT.Selection, new Listener() {

            @Override
            public void handleEvent(Event e) {
                setSort(3);
            }
        });
        descriptionColumn = new TreeColumn(wTree, SWT.LEFT);
        descriptionColumn.setText(BaseMessages.getString(PKG, "RepositoryExplorerDialog.Column.Description"));
        descriptionColumn.setWidth(120);
        descriptionColumn.addListener(SWT.Selection, new Listener() {

            @Override
            public void handleEvent(Event e) {
                setSort(4);
            }
        });
        lockColumn = new TreeColumn(wTree, SWT.LEFT);
        lockColumn.setText(BaseMessages.getString(PKG, "RepositoryExplorerDialog.Column.LockMessage"));
        lockColumn.setWidth(120);
        lockColumn.addListener(SWT.Selection, new Listener() {

            @Override
            public void handleEvent(Event e) {
                setSort(5);
            }
        });
        // Add a memory to the tree.
        TreeMemory.addTreeListener(wTree, STRING_REPOSITORY_EXPLORER_TREE_NAME);
        // Buttons
        wOK = new Button(shell, SWT.PUSH);
        wOK.setText(BaseMessages.getString(PKG, "System.Button.OK"));
        FormData fdTree = new FormData();
        int margin = 10;
        // To the right of the label
        fdTree.left = new FormAttachment(0, 0);
        fdTree.top = new FormAttachment(treeTb, 0);
        fdTree.right = new FormAttachment(100, 0);
        fdTree.bottom = new FormAttachment(100, -50);
        wTree.setLayoutData(fdTree);
        BaseStepDialog.positionBottomButtons(shell, new Button[] { wOK }, margin, null);
        // Add listeners
        wOK.addListener(SWT.Selection, new Listener() {

            @Override
            public void handleEvent(Event e) {
                close();
            }
        });
        wTree.addMenuDetectListener(new MenuDetectListener() {

            @Override
            public void menuDetected(MenuDetectEvent e) {
                setTreeMenu();
            }
        });
        wTree.addMouseListener(new MouseAdapter() {

            @Override
            public void mouseDoubleClick(MouseEvent e) {
                if (e.button == 1) {
                    // left double click!
                    doDoubleClick();
                }
            }
        });
        wTree.addKeyListener(new KeyAdapter() {

            @Override
            public void keyPressed(KeyEvent e) {
                // F2 --> rename...
                if (e.keyCode == SWT.F2) {
                    if (!readonly) {
                        renameInTree();
                    }
                }
                // F5 --> refresh...
                if (e.keyCode == SWT.F5) {
                    refreshTree();
                }
            }
        });
        expandAll.addSelectionListener(new SelectionAdapter() {

            @Override
            public void widgetSelected(SelectionEvent event) {
                expandAllItems(wTree.getItems(), true);
            }
        });
        collapseAll.addSelectionListener(new SelectionAdapter() {

            @Override
            public void widgetSelected(SelectionEvent event) {
                expandAllItems(wTree.getItems(), false);
            }
        });
        importFromXML.addSelectionListener(new SelectionAdapter() {

            @Override
            public void widgetSelected(SelectionEvent event) {
                importAll();
            }
        });
        exportToXML.addSelectionListener(new SelectionAdapter() {

            @Override
            public void widgetSelected(SelectionEvent event) {
                exportAll(null);
            }
        });
        showHideDeleted.addSelectionListener(new SelectionAdapter() {

            @Override
            public void widgetSelected(SelectionEvent event) {
                includeDeleted = !includeDeleted;
                if (includeDeleted) {
                    showHideDeleted.setText(BaseMessages.getString(PKG, "RepositoryExplorerDialog.ToolItem.HideDeleted.Label"));
                    showHideDeleted.setToolTipText(BaseMessages.getString(PKG, "RepositoryExplorerDialog.ToolItem.HideDeleted.Tooltip"));
                } else {
                    showHideDeleted.setText(BaseMessages.getString(PKG, "RepositoryExplorerDialog.ToolItem.ShowDeleted.Label"));
                    showHideDeleted.setToolTipText(BaseMessages.getString(PKG, "RepositoryExplorerDialog.ToolItem.ShowDeleted.Tooltip"));
                }
                refreshTree();
            }
        });
        // Drag & Drop
        Transfer[] ttypes = new Transfer[] { TextTransfer.getInstance() };
        DragSource ddSource = new DragSource(wTree, DND.DROP_MOVE);
        ddSource.setTransfer(ttypes);
        ddSource.addDragListener(new DragSourceListener() {

            @Override
            public void dragStart(DragSourceEvent event) {
                debug = "drag start";
                event.doit = true;
            }

            @Override
            public void dragSetData(DragSourceEvent event) {
                debug = "drag set data";
                event.data = "";
                event.doit = false;
                TreeItem[] ti = wTree.getSelection();
                if (ti.length >= 1) {
                    int cat = getItemCategory(ti[0]);
                    // 
                    if (cat == ITEM_CATEGORY_TRANSFORMATION) {
                        debug = "drag set: drag around transformation";
                        RepositoryDirectoryInterface repdir = getDirectory(ti[0]);
                        if (repdir != null) {
                            // 
                            // Pass info as a piece of XML
                            // 
                            String xml = XMLHandler.getXMLHeader();
                            xml += "<dragdrop>" + Const.CR;
                            xml += "  " + XMLHandler.addTagValue("directory", repdir.getPath());
                            xml += "  " + XMLHandler.addTagValue("transformation", ti[0].getText());
                            xml += "</dragdrop>" + Const.CR;
                            event.data = xml;
                            event.doit = true;
                        }
                    } else if (cat == ITEM_CATEGORY_JOB) {
                        debug = "drag set: drag around job";
                        RepositoryDirectoryInterface repdir = getDirectory(ti[0]);
                        if (repdir != null) {
                            // 
                            // Pass info as a piece of XML
                            // 
                            String xml = XMLHandler.getXMLHeader();
                            xml += "<dragdrop>" + Const.CR;
                            xml += "  " + XMLHandler.addTagValue("directory", repdir.getPath());
                            xml += "  " + XMLHandler.addTagValue("job", ti[0].getText());
                            xml += "</dragdrop>" + Const.CR;
                            event.data = xml;
                            event.doit = true;
                        }
                    } else {
                        debug = "do nothing";
                        String xml = XMLHandler.getXMLHeader();
                        xml += "<dragdrop>" + Const.CR;
                        xml += "</dragdrop>" + Const.CR;
                        event.data = xml;
                        event.doit = true;
                    }
                }
            }

            @Override
            public void dragFinished(DragSourceEvent event) {
            }
        });
        DropTarget ddTarget = new DropTarget(wTree, DND.DROP_MOVE);
        ddTarget.setTransfer(ttypes);
        ddTarget.addDropListener(new DropTargetListener() {

            @Override
            public void dragEnter(DropTargetEvent event) {
            }

            @Override
            public void dragLeave(DropTargetEvent event) {
                debug = "drag leave";
            }

            @Override
            public void dragOperationChanged(DropTargetEvent event) {
            }

            @Override
            public void dragOver(DropTargetEvent event) {
                debug = "drag over";
            }

            @Override
            public void drop(DropTargetEvent event) {
                try {
                    debug = "Drop item in tree";
                    if (event.data == null) {
                        // no data to copy, indicate failure in event.detail
                        event.detail = DND.DROP_NONE;
                        return;
                    }
                    // event.feedback = DND.FEEDBACK_NONE;
                    TreeItem ti = (TreeItem) event.item;
                    if (ti != null) {
                        debug = "Get category";
                        int category = getItemCategory(ti);
                        if (category == ITEM_CATEGORY_TRANSFORMATION_DIRECTORY || category == ITEM_CATEGORY_TRANSFORMATION) {
                            debug = "Get directory";
                            RepositoryDirectoryInterface repdir = getDirectory(ti);
                            if (repdir != null) {
                                event.feedback = DND.FEEDBACK_SELECT | DND.FEEDBACK_SCROLL;
                                if (moveTransformation((String) event.data, repdir)) {
                                    refreshTree();
                                } else {
                                    MessageBox mb = new MessageBox(shell, SWT.ICON_INFORMATION | SWT.OK);
                                    mb.setMessage(BaseMessages.getString(PKG, "RepositoryExplorerDialog.Trans.Move.UnableToMove.Message"));
                                    mb.setText(BaseMessages.getString(PKG, "RepositoryExplorerDialog.Trans.Move.UnableToMove.Title"));
                                    mb.open();
                                }
                            }
                        } else if (category == ITEM_CATEGORY_JOB_DIRECTORY || category == ITEM_CATEGORY_JOB) {
                            debug = "Get directory";
                            RepositoryDirectoryInterface repdir = getDirectory(ti);
                            if (repdir != null) {
                                event.feedback = DND.FEEDBACK_SELECT | DND.FEEDBACK_SCROLL;
                                if (moveJob((String) event.data, repdir)) {
                                    refreshTree();
                                } else {
                                    MessageBox mb = new MessageBox(shell, SWT.ICON_INFORMATION | SWT.OK);
                                    mb.setMessage(BaseMessages.getString(PKG, "RepositoryExplorerDialog.Job.Move.UnableToMove.Message"));
                                    mb.setText(BaseMessages.getString(PKG, "RepositoryExplorerDialog.Job.Move.UnableToMove.Title"));
                                    mb.open();
                                }
                            }
                        } else {
                            MessageBox mb = new MessageBox(shell, SWT.ICON_INFORMATION | SWT.OK);
                            mb.setMessage(BaseMessages.getString(PKG, "RepositoryExplorerDialog.Trans.Move.SorryOneItemAtATime.Message"));
                            mb.setText(BaseMessages.getString(PKG, "RepositoryExplorerDialog.Trans.Move.SorryOneItemAtATime.Title"));
                            mb.open();
                        }
                    }
                } catch (Throwable e) {
                    new ErrorDialog(shell, BaseMessages.getString(PKG, "RepositoryExplorerDialog.Drop.UnexpectedError.Title"), BaseMessages.getString(PKG, "RepositoryExplorerDialog.Drop.UnexpectedError.Message1") + debug + "]" + Const.CR + BaseMessages.getString(PKG, "RepositoryExplorerDialog.Drop.UnexpectedError.Message2"), e);
                }
            }

            @Override
            public void dropAccept(DropTargetEvent event) {
                debug = "drop accept";
            }
        });
        // Detect X or ALT-F4 or something that kills this window...
        shell.addShellListener(new ShellAdapter() {

            @Override
            public void shellClosed(ShellEvent e) {
                close();
            }
        });
        debug = "set screen size and position";
        BaseStepDialog.setSize(shell, 400, 480, true);
        // refreshes too.
        setSort(0);
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch()) {
                display.sleep();
            }
        }
    } catch (Throwable e) {
        new ErrorDialog(shell, BaseMessages.getString(PKG, "RepositoryExplorerDialog.Main.UnexpectedError.Title"), BaseMessages.getString(PKG, "RepositoryExplorerDialog.Main.UnexpectedError.Message1") + debug + "]" + Const.CR + BaseMessages.getString(PKG, "RepositoryExplorerDialog.Main.UnexpectedError.Message2") + Const.CR + BaseMessages.getString(PKG, "RepositoryExplorerDialog.Main.UnexpectedError.Message3"), e);
    }
    return lastOpened;
}

Example 12 with DragSourceListener

use of org.eclipse.swt.dnd.DragSourceListener in project pentaho-kettle by pentaho.

the class SpoonTreeDelegate method addDragSourceToTree.

public void addDragSourceToTree(final Tree tree, final Tree selectionTree, final Tree coreObjectsTree) {
    // Drag & Drop for steps
    Transfer[] ttypes = new Transfer[] { XMLTransfer.getInstance() };
    DragSource ddSource = new DragSource(tree, DND.DROP_MOVE);
    ddSource.setTransfer(ttypes);
    ddSource.addDragListener(new DragSourceListener() {

        public void dragStart(DragSourceEvent event) {
            TreeSelection[] treeObjects = getTreeObjects(tree, selectionTree, coreObjectsTree);
            if (treeObjects.length == 0) {
                event.doit = false;
                return;
            }
            spoon.hideToolTips();
            TreeSelection treeObject = treeObjects[0];
            Object object = treeObject.getSelection();
            TransMeta transMeta = spoon.getActiveTransformation();
            if (object instanceof StepMeta || object instanceof PluginInterface || (object instanceof DatabaseMeta && transMeta != null) || object instanceof TransHopMeta || object instanceof JobEntryCopy) {
                event.doit = true;
            } else {
                event.doit = false;
            }
        }

        public void dragSetData(DragSourceEvent event) {
            TreeSelection[] treeObjects = getTreeObjects(tree, selectionTree, coreObjectsTree);
            if (treeObjects.length == 0) {
                event.doit = false;
                return;
            }
            int type = 0;
            String id = null;
            String data = null;
            TreeSelection treeObject = treeObjects[0];
            Object object = treeObject.getSelection();
            if (object instanceof StepMeta) {
                StepMeta stepMeta = (StepMeta) object;
                type = DragAndDropContainer.TYPE_STEP;
                // name of the step.
                data = stepMeta.getName();
            } else if (object instanceof PluginInterface) {
                PluginInterface plugin = (PluginInterface) object;
                Class<? extends PluginTypeInterface> pluginType = plugin.getPluginType();
                if (Const.classIsOrExtends(pluginType, StepPluginType.class)) {
                    type = DragAndDropContainer.TYPE_BASE_STEP_TYPE;
                    id = plugin.getIds()[0];
                    // Step type name
                    data = plugin.getName();
                } else {
                    type = DragAndDropContainer.TYPE_BASE_JOB_ENTRY;
                    // job entry type name
                    data = plugin.getName();
                    if (treeObject.getItemText().equals(JobMeta.createStartEntry().getName())) {
                        data = treeObject.getItemText();
                    } else if (treeObject.getItemText().equals(JobMeta.createDummyEntry().getName())) {
                        data = treeObject.getItemText();
                    }
                }
            } else if (object instanceof DatabaseMeta) {
                DatabaseMeta databaseMeta = (DatabaseMeta) object;
                type = DragAndDropContainer.TYPE_DATABASE_CONNECTION;
                data = databaseMeta.getName();
            } else if (object instanceof TransHopMeta) {
                TransHopMeta hop = (TransHopMeta) object;
                type = DragAndDropContainer.TYPE_TRANS_HOP;
                // nothing for really ;-)
                data = hop.toString();
            } else if (object instanceof JobEntryCopy) {
                JobEntryCopy jobEntryCopy = (JobEntryCopy) object;
                type = DragAndDropContainer.TYPE_JOB_ENTRY;
                // name of the job entry.
                data = jobEntryCopy.getName();
            } else {
                event.doit = false;
                // ignore anything else you drag.
                return;
            }
            event.data = new DragAndDropContainer(type, data, id);
        }

        public void dragFinished(DragSourceEvent event) {
        }
    });
}

Example 13 with DragSourceListener

use of org.eclipse.swt.dnd.DragSourceListener in project tdq-studio-se by Talend.

the class AnalysisColumnNominalIntervalTreeViewer method addSourceDND.

/**
 * DOC bZhou Comment method "addSourceDND".
 *
 * @param newTree
 */
private void addSourceDND(final Tree newTree) {
    final LocalSelectionTransfer transfer = LocalSelectionTransfer.getTransfer();
    Transfer[] types = new Transfer[] { transfer };
    int operations = DND.DROP_COPY | DND.DROP_MOVE;
    final DragSource source = new DragSource(newTree, operations);
    source.setTransfer(types);
    final TreeItem[] dragSourceItem = new TreeItem[1];
    source.addDragListener(new DragSourceListener() {

        public void dragStart(DragSourceEvent event) {
            TreeItem[] selection = newTree.getSelection();
            dragSourceItem[0] = selection[0];
            if (selection.length > 0) {
                event.doit = true;
                transfer.setSelection(new StructuredSelection(selection[0].getData(COLUMN_INDICATOR_KEY)));
                getColumnSetMultiValueList().remove(selection[0].getData(COLUMN_INDICATOR_KEY));
            } else {
                event.doit = false;
            }
        }

        public void dragSetData(DragSourceEvent event) {
            event.data = dragSourceItem[0];
        }

        public void dragFinished(DragSourceEvent event) {
            if (event.detail == DND.DROP_MOVE) {
                removeItemBranch(dragSourceItem[0]);
                tree.forceFocus();
            }
            dragSourceItem[0] = null;
        }
    });
}

Example 14 with DragSourceListener

use of org.eclipse.swt.dnd.DragSourceListener in project cogtool by cogtool.

the class ProjectUI method setUpDragAndDrop.

// See http://www.eclipse.org/articles/Article-SWT-DND/DND-in-SWT.html
// for more documentation of SWT drag-and-drop support.
protected void setUpDragAndDrop() {
    DragSource treeAsSource = new DragSource(tree, DND.DROP_MOVE | DND.DROP_COPY);
    TaskDnDTransfer taskTransfer = TaskDnDTransfer.getInstance();
    TaskAppDnDTransfer taskAppTransfer = TaskAppDnDTransfer.getInstance();
    Transfer[] types = new Transfer[] { taskTransfer, taskAppTransfer };
    treeAsSource.setTransfer(types);
    // DropSourceEvent fields:
    // dataType:
    //   the Transfer type of the data the target prefers to receive;
    //   useful in dragSetData
    // detail:
    //   the operation the target performed; one of:
    //      DROP_MOVE - move from source to target; remove from source
    //      DROP_COPY - copy the source to target; leave the source
    //      DROP_LINK - create a link of the source at the target
    //   useful in dragFinished in case the source needs to be removed
    // doit:
    //   in dragStart, determines if the operation should proceed
    //   in dragFinished, may be set to indicate if the operation succeeded
    // image:
    //   may be set to the Image displayed during drag
    // x, y: position within the Tree
    DragSourceListener srcListener = new TreeDragSourceEffect(tree) {

        @Override
        public void dragStart(DragSourceEvent evt) {
            // If the Transfer type cannot be determined until the drag
            // starts, the setTransfer() call can be invoked here.
            // Set evt.doit to false here if action is inappropriate.
            // Reset, just in case no drag-and-drop should happen
            currentDnDSource = null;
            // Must be in first column!
            TreeColumn column = findColumn(evt.x);
            TreeItem row = tree.getItem(new Point(evt.x, evt.y));
            if ((column != null) && (column.getData() == null)) {
                if ((row != null) && (row.getData() != null)) {
                    if (((AUndertaking) row.getData()).isSpawned()) {
                        evt.doit = false;
                        return;
                    }
                }
                if (selection.getSelectedTaskCount() == 0) {
                    if (row != null) {
                        selection.setSelectedItem(row);
                        currentDnDSource = tree;
                        currentDnDColumn = 0;
                    }
                } else {
                    currentDnDSource = tree;
                    currentDnDColumn = 0;
                }
            } else {
                // Must be in cell with a valid TaskApplication!
                if ((column != null) && (column.getData() != null)) {
                    if ((row != null) && (row.getData() != null)) {
                        Design design = (Design) column.getData();
                        AUndertaking task = (AUndertaking) row.getData();
                        TaskApplication taskApp = project.getTaskApplication(task, design);
                        if (taskApp != null) {
                            if (!taskApp.getDemonstration().isEditable()) {
                                evt.doit = false;
                                return;
                            }
                            // set some highlighting of the source cell
                            selection.setSelectedCell(row, column);
                            contextSelection.setSelectedDesign(design);
                            contextSelection.addSelectedTask(task);
                            currentDnDRow = row;
                            currentDnDSource = tree;
                            currentDnDColumn = tree.indexOf(column);
                            // do not do superclass work!
                            return;
                        }
                    }
                }
                evt.doit = false;
            }
            super.dragStart(evt);
        }

        @Override
        public void dragSetData(DragSourceEvent evt) {
            // Based on the requested Transfer data type, set evt.data
            //                    if (taskTransfer.isSupportedType(evt.dataType)) {
            //                        evt.data = "This is the requested data";
            //                    }
            super.dragSetData(evt);
        }

        @Override
        public void dragFinished(DragSourceEvent evt) {
            // Operation was performed by the drop target; clean up
            // If needed, evt.detail should be the operation performed.
            super.dragFinished(evt);
            currentDnDSource = null;
            currentDnDColumn = -1;
            currentDnDRow = null;
            currentDndTaskAppDropRow = null;
        }
    };
    treeAsSource.addDragListener(srcListener);
    DropTarget treeAsTarget = new DropTarget(tree, DND.DROP_MOVE | DND.DROP_COPY);
    treeAsTarget.setTransfer(types);
    // DropTargetEvent fields:
    // currentDataType:
    //   the Transfer type of the data the target prefers to receive;
    //   can be set -- see the method comments below
    // dataTypes:
    //   the array of Transfer types the source can "send"
    // detail:
    //   the operation the user is trying to perform; one of:
    //      DROP_MOVE - move from source to target; remove from source
    //      DROP_COPY - copy the source to target; leave the source
    //      DROP_LINK - create a link of the source at the target
    //      DROP_DEFAULT - indicator that target must choose operation
    //      DROP_NONE - indicator that user is trying an unsupported op
    //   may be set to the operation the target feels is correct
    //   (thus, if initially DEFAULT, then the operation that would be
    //   performed; if initially DEFAULT and not changed, it will appear
    //   to the user as a MOVE -- also, set to NONE if target determines
    //   operation is not permitted)
    // feedback:
    //   bitwise OR'ing of feedback effects displayed to the user;
    //   can be set using the following constants:
    //      FEEDBACK_SELECT - item under cursor is selected
    //      FEEDBACK_SCROLL - allows scrolling to make items visible
    //      FEEDBACK_EXPAND - allows tree items to be expanded
    //      FEEDBACK_INSERT_BEFORE - insertion mark before item under cursor
    //      FEEDBACK_INSERT_AFTER - insertion mark after item under cursor
    //      FEEDBACK_NONE - no feedback
    // item:
    //   TreeItem or TableItem under the cursor, if applicable
    // operations:
    //   bitwise OR'ing of the operations that the DragSource can support
    treeAsTarget.addDropListener(new TreeDropTargetEffect(tree) {

        protected static final int DRAG_FEEDBACK = DND.FEEDBACK_EXPAND | DND.FEEDBACK_INSERT_BEFORE | DND.FEEDBACK_SCROLL;

        protected static final int DRAG_APP_FEEDBACK = DND.FEEDBACK_EXPAND | DND.FEEDBACK_SCROLL;

        protected int requestedOp = DND.DROP_MOVE;

        @Override
        public void dragEnter(DropTargetEvent evt) {
            // Set evt.detail to DND.DROP_NONE when the operation is a no-op
            // or if the presented type is unacceptable.  Other choices
            // that make sense: DND.DROP_MOVE, DND.DROP_COPY
            // evt.currentDataType is the type preferred by the target.
            // evt.dataTypes contains types provided by the source.
            super.dragEnter(evt);
            if (currentDnDSource != getControl()) {
                evt.detail = DND.DROP_NONE;
            } else {
                requestedOp = evt.detail;
            }
        }

        @Override
        public void dragLeave(DropTargetEvent evt) {
            if (currentDndTaskAppDropRow != null) {
                currentDndTaskAppDropRow.setBackground(currentDnDColumn, ProjectUIModel.unselectedTaskBackgroundColor);
            }
            super.dragLeave(evt);
        }

        @Override
        public void dragOperationChanged(DropTargetEvent evt) {
            // change evt.currentDataType if desired here.
            if ((evt.detail != DND.DROP_MOVE) && (evt.detail != DND.DROP_COPY)) {
                evt.detail = DND.DROP_NONE;
            }
            requestedOp = evt.detail;
            super.dragOperationChanged(evt);
        }

        @Override
        public void dragOver(DropTargetEvent evt) {
            if (currentDndTaskAppDropRow != null) {
                currentDndTaskAppDropRow.setBackground(currentDnDColumn, ProjectUIModel.unselectedTaskBackgroundColor);
            }
            Point toTreeEvtLoc = tree.toControl(evt.x, evt.y);
            //System.out.println("dragOver; set feedback here?");
            if (currentDnDSource != getControl()) {
                evt.detail = DND.DROP_NONE;
                evt.feedback = DND.FEEDBACK_NONE;
            } else if (currentDnDColumn == 0) {
                // Moving tasks
                evt.feedback = DRAG_FEEDBACK;
                evt.detail = requestedOp;
                TreeItem row = tree.getItem(toTreeEvtLoc);
                if ((row != null) && (row.getData() != null)) {
                    if (((AUndertaking) row.getData()).isSpawned()) {
                        evt.detail = DND.DROP_NONE;
                        evt.feedback = DND.FEEDBACK_NONE;
                    }
                }
            } else {
                // Moving task applications
                evt.feedback = DRAG_APP_FEEDBACK;
                TreeColumn column = findColumn(toTreeEvtLoc.x);
                if (column == null) {
                    evt.detail = DND.DROP_NONE;
                } else {
                    Design design = (Design) column.getData();
                    if (design != contextSelection.getSelectedDesign()) {
                        evt.detail = DND.DROP_NONE;
                    } else {
                        TreeItem row = tree.getItem(toTreeEvtLoc);
                        if ((row == null) || (row.getData() == null)) {
                            evt.detail = DND.DROP_NONE;
                        } else {
                            AUndertaking task = (AUndertaking) row.getData();
                            if (task.isTaskGroup() || task.isSpawned() || contextSelection.isTaskSelected(task)) {
                                evt.detail = DND.DROP_NONE;
                            } else {
                                evt.detail = requestedOp;
                                currentDndTaskAppDropRow = row;
                                currentDndTaskAppDropRow.setBackground(currentDnDColumn, CONTEXT_COLOR);
                            }
                        }
                    }
                }
            }
            super.dragOver(evt);
        }

        @Override
        public void dropAccept(DropTargetEvent evt) {
            // Can change evt.detail if desired here.
            // Provide one last chance to define the type of data that
            // will be returned in the drop event; thus, change
            // evt.currentDataType if desired here
            super.dropAccept(evt);
        }

        @Override
        public void drop(DropTargetEvent evt) {
            // When the drop operation is completed, update the
            // evt.detail field with the operation performed.
            // Do the operation!
            AUndertaking beforeTask = null;
            if (evt.item != null) {
                beforeTask = (AUndertaking) evt.item.getData();
            }
            if (requestedOp == DND.DROP_COPY) {
                if (currentDnDColumn == 0) {
                    ProjectUI.ChangeTaskPositionParms parms = new ProjectUI.ChangeTaskPositionParms(selection, beforeTask, true);
                    if (performAction(ProjectLID.DuplicateTaskFull, parms, true)) {
                        evt.detail = DND.DROP_COPY;
                    }
                } else {
                    AUndertaking fromTask = (AUndertaking) currentDnDRow.getData();
                    AUndertaking toTask = (AUndertaking) currentDndTaskAppDropRow.getData();
                    TreeColumn column = tree.getColumn(currentDnDColumn);
                    Design design = (Design) column.getData();
                    ProjectUI.MoveCopyTaskApplicationParms parms = new ProjectUI.MoveCopyTaskApplicationParms(fromTask, toTask, design);
                    selection.setSelectedCell(currentDndTaskAppDropRow, column);
                    if (performAction(ProjectLID.DuplicateTaskApplication, parms, true)) {
                        uiModel.redisplayAllResults();
                        evt.detail = DND.DROP_COPY;
                    }
                }
            } else if (requestedOp == DND.DROP_MOVE) {
                if (currentDnDColumn == 0) {
                    ProjectUI.ChangeTaskPositionParms parms = new ProjectUI.ChangeTaskPositionParms(selection, beforeTask, false);
                    if (performAction(ProjectLID.ChangeTaskPosition, parms, true)) {
                        evt.detail = DND.DROP_MOVE;
                    }
                } else {
                    AUndertaking fromTask = (AUndertaking) currentDnDRow.getData();
                    AUndertaking toTask = (AUndertaking) currentDndTaskAppDropRow.getData();
                    TreeColumn column = tree.getColumn(currentDnDColumn);
                    Design design = (Design) column.getData();
                    ProjectUI.MoveCopyTaskApplicationParms parms = new ProjectUI.MoveCopyTaskApplicationParms(fromTask, toTask, design);
                    selection.setSelectedCell(currentDndTaskAppDropRow, column);
                    if (performAction(ProjectLID.MoveTaskApplication, parms, true)) {
                        uiModel.redisplayAllResults();
                        evt.detail = DND.DROP_MOVE;
                    }
                }
            }
            super.drop(evt);
        }
    });
}

Example 15 with DragSourceListener

use of org.eclipse.swt.dnd.DragSourceListener in project tdi-studio-se by Talend.

the class HL7Message2SchemaDragAndDropHandler method createDragSource.

private void createDragSource() {
    if (dragSource != null) {
        dragSource.dispose();
    }
    dragSource = new DragSource(linker.getTree(), DND.DROP_DEFAULT | DND.DROP_MOVE | DND.DROP_COPY | DND.DROP_LINK);
    dragSource.setTransfer(new Transfer[] { SegmentTransfer.getInstance() });
    DragSourceListener sourceListener = new TreeDragSourceListener();
    dragSource.addDragListener(sourceListener);
}