Example usage for org.eclipse.jface.viewers ITreeSelection getFirstElement

Introduction

In this page you can find the example usage for org.eclipse.jface.viewers ITreeSelection getFirstElement.

Prototype

public Object getFirstElement();

Source Link

Document

Returns the first element in this selection, or null if the selection is empty.

Usage

From source file:com.android.ide.eclipse.adt.internal.editors.ui.tree.UiElementDetail.java

License:Open Source License

@Override
public void selectionChanged(IFormPart part, ISelection selection) {
    if (part == mMasterPart && !selection.isEmpty() && selection instanceof ITreeSelection) {
        ITreeSelection tree_selection = (ITreeSelection) selection;

        Object first = tree_selection.getFirstElement();
        if (first instanceof UiElementNode) {
            UiElementNode ui_node = (UiElementNode) first;
            createUiAttributeControls(mManagedForm, ui_node);
        }/* ww  w  .  jav a2  s .co m*/
    }
}

From source file:com.android.ide.eclipse.adt.internal.editors.ui.tree.UiTreeBlock.java

License:Open Source License

/**
 * Called when the "Add..." button next to the tree view is selected.
 *
 * Displays a selection dialog that lets the user select which kind of node
 * to create, depending on the current selection.
 *//*  w  w w . ja v  a 2  s .  c om*/
private void doTreeAdd() {
    UiElementNode ui_node = mUiRootNode;
    ISelection selection = mTreeViewer.getSelection();
    if (!selection.isEmpty() && selection instanceof ITreeSelection) {
        ITreeSelection tree_selection = (ITreeSelection) selection;
        Object first = tree_selection.getFirstElement();
        if (first != null && first instanceof UiElementNode) {
            ui_node = (UiElementNode) first;
        }
    }

    mUiTreeActions.doAdd(ui_node, mDescriptorFilters, mTreeViewer.getControl().getShell(),
            (ILabelProvider) mTreeViewer.getLabelProvider());
}

From source file:com.android.ide.eclipse.editors.ui.tree.UiElementDetail.java

License:Open Source License

public void selectionChanged(IFormPart part, ISelection selection) {
    if (part == mMasterPart && !selection.isEmpty() && selection instanceof ITreeSelection) {
        ITreeSelection tree_selection = (ITreeSelection) selection;

        Object first = tree_selection.getFirstElement();
        if (first instanceof UiElementNode) {
            UiElementNode ui_node = (UiElementNode) first;
            createUiAttributeControls(mManagedForm, ui_node);
        }//from   ww w .  j  a  v  a 2s  .c o  m
    }
}

From source file:com.android.sdkuilib.internal.repository.sdkman2.PackagesPage.java

License:Apache License

private void onTreeDoubleClick(DoubleClickEvent event) {
    assert event.getSource() == mTreeViewer;
    ISelection sel = event.getSelection();
    if (sel.isEmpty() || !(sel instanceof ITreeSelection)) {
        return;/* w w w  .jav  a2  s .co  m*/
    }
    ITreeSelection tsel = (ITreeSelection) sel;
    Object elem = tsel.getFirstElement();
    if (elem == null) {
        return;
    }

    ITreeContentProvider provider = (ITreeContentProvider) mTreeViewer.getContentProvider();
    Object[] children = provider.getElements(elem);
    if (children == null) {
        return;
    }

    if (children.length > 0) {
        // If the element has children, expand/collapse it.
        if (mTreeViewer.getExpandedState(elem)) {
            mTreeViewer.collapseToLevel(elem, 1);
        } else {
            mTreeViewer.expandToLevel(elem, 1);
        }
    } else {
        // If the element is a terminal one, select/deselect it.
        checkAndExpandItem(elem, !mTreeViewer.getChecked(elem), false /*fixChildren*/, true /*fixParent*/);
        updateButtonsState();
    }
}

From source file:com.buildml.eclipse.packages.handlers.MoveToPackageDialog.java

License:Open Source License

@Override
protected void okPressed() {

    ITreeSelection selection = (ITreeSelection) viewer.getSelection();
    Object selectedNode = selection.getFirstElement();
    if (selectedNode instanceof UIPackage) {
        savedPackageId = ((UIPackage) selectedNode).getId();
    }//from   w  w w.  j  a  v  a2  s. com

    /* now dispose the window */
    super.okPressed();
}

From source file:com.buildml.eclipse.utils.dialogs.VFSTreeSelectionDialog.java

License:Open Source License

@Override
protected Control createContents(Composite parent) {
    Control contents = super.createContents(parent);

    /* customize the dialog box, before it's opened */
    final TreeViewer viewer = getTreeViewer();
    viewer.expandToLevel(5);/*from w  w w .  j av a2 s .  c  o  m*/

    /* 
     * Unless the user is allowed to select directories, disable the OK button if
     * a directory is selected.
     */
    if (!allowDirs) {
        viewer.addSelectionChangedListener(new ISelectionChangedListener() {
            @Override
            public void selectionChanged(SelectionChangedEvent event) {
                ITreeSelection selection = (ITreeSelection) viewer.getSelection();
                Object element = selection.getFirstElement();
                getButton(OK).setEnabled(!(element instanceof UIDirectory));
            }
        });
    }

    return contents;
}

From source file:com.google.devtools.depan.resource_doc.eclipse.ui.widgets.ProjectResourceControl.java

License:Apache License

public IContainer getSelectedContainer() {
    ITreeSelection blix = containerViewer.getStructuredSelection();
    Object item = blix.getFirstElement();
    if (item instanceof IContainer) {
        return (IContainer) item;
    }/* w  ww .j  a  v a 2  s. com*/
    return null;
}

From source file:com.google.devtools.depan.resource_doc.eclipse.ui.widgets.ProjectResourceControl.java

License:Apache License

@SuppressWarnings("unchecked")
public T getSelectedResource() {
    ITreeSelection blix = containerViewer.getStructuredSelection();
    Object item = blix.getFirstElement();
    if (item instanceof PropertyDocument<?>) {
        return (T) item;
    }/*from   w w w .j a va 2  s  .co  m*/
    return null;
}

From source file:com.google.devtools.depan.resource_doc.eclipse.ui.widgets.ProjectResourceControl.java

License:Apache License

public IFile getSelectedDocument() {
    ITreeSelection blix = containerViewer.getStructuredSelection();
    Object item = blix.getFirstElement();
    if (item instanceof IFile) {
        return (IFile) item;
    }//from  w  ww. j ava2s  .c  om
    return null;
}

From source file:com.google.gapid.widgets.Widgets.java

License:Apache License

public static TreeViewer createTreeViewer(Tree tree) {
    TreeViewer viewer = new VisibilityTrackingTreeViewer(tree);
    viewer.setUseHashlookup(true);/*www .j a  va 2 s  .  c o  m*/
    tree.addListener(SWT.KeyDown, e -> {
        switch (e.keyCode) {
        case SWT.ARROW_LEFT:
        case SWT.ARROW_RIGHT:
            ITreeSelection selection = viewer.getStructuredSelection();
            if (selection.size() == 1) {
                viewer.setExpandedState(selection.getFirstElement(), e.keyCode == SWT.ARROW_RIGHT);
            }
            break;
        }
    });
    viewer.addDoubleClickListener(new IDoubleClickListener() {
        @Override
        public void doubleClick(DoubleClickEvent event) {
            IStructuredSelection selection = (IStructuredSelection) event.getSelection();
            if (selection.size() == 1) {
                Object element = selection.getFirstElement();
                viewer.setExpandedState(element, !viewer.getExpandedState(element));
            }
        }
    });
    return viewer;
}