IDEA-35738 Cannot drag around label with empty text

2026-09-27 10:03:11 +07:00 · 2012-01-24 18:28:23 +04:00
parent f8e5d17e6d
commit 7a5d4d2a5f
2 changed files with 139 additions and 115 deletions
@@ -68,7 +68,7 @@ public final class FormEditingUtil {
  private FormEditingUtil() {
  }

-  public static boolean canDeleteSelection(final GuiEditor editor){
+  public static boolean canDeleteSelection(final GuiEditor editor) {
    final ArrayList<RadComponent> selection = getSelectedComponents(editor);
    if (selection.isEmpty()) return false;
    final RadRootContainer rootContainer = editor.getRootContainer();
@@ -83,7 +83,7 @@ public final class FormEditingUtil {
   *
   * @param editor the editor in which the selection is deleted.
   */
-  public static void deleteSelection(final GuiEditor editor){
+  public static void deleteSelection(final GuiEditor editor) {
    final List<RadComponent> selection = getSelectedComponents(editor);
    deleteComponents(selection, true);
    editor.refreshAndSave(true);
@@ -93,7 +93,7 @@ public final class FormEditingUtil {
    if (selection.size() == 0) {
      return;
    }
-    final RadRootContainer rootContainer = (RadRootContainer) getRoot(selection.iterator().next());
+    final RadRootContainer rootContainer = (RadRootContainer)getRoot(selection.iterator().next());
    final Set<String> deletedComponentIds = new HashSet<String>();
    for (final RadComponent component : selection) {
      boolean wasSelected = component.isSelected();
@@ -126,7 +126,7 @@ public final class FormEditingUtil {
          parent.getComponent(index).setSelected(true);
        }
        else if (index > 0 && parent.getComponentCount() == index) {
-          parent.getComponent(index-1).setSelected(true);
+          parent.getComponent(index - 1).setSelected(true);
        }
        else {
          parent.setSelected(true);
@@ -178,7 +178,7 @@ public final class FormEditingUtil {

  private static void deleteEmptyGridCells(final RadContainer parent, final GridConstraints delConstraints, final boolean isRow) {
    final RadAbstractGridLayoutManager layoutManager = parent.getGridLayoutManager();
-    for(int cell=delConstraints.getCell(isRow) + delConstraints.getSpan(isRow)-1; cell>= delConstraints.getCell(isRow); cell--) {
+    for (int cell = delConstraints.getCell(isRow) + delConstraints.getSpan(isRow) - 1; cell >= delConstraints.getCell(isRow); cell--) {
      if (cell < parent.getGridCellCount(isRow) && GridChangeUtil.canDeleteCell(parent, cell, isRow) == GridChangeUtil.CellStatus.Empty &&
          !layoutManager.isGapCell(parent, isRow, cell)) {
        layoutManager.deleteGridCells(parent, cell, isRow);
@@ -186,7 +186,7 @@ public final class FormEditingUtil {
    }
  }

-  private static final int EMPTY_COMPONENT_SIZE = 5;
+  public static final int EMPTY_COMPONENT_SIZE = 5;

  private static Component getDeepestEmptyComponentAt(JComponent parent, Point location) {
    int size = parent.getComponentCount();
@@ -228,7 +228,7 @@ public final class FormEditingUtil {
   * @param x in editor pane coordinates
   * @param y in editor pane coordinates
   */
-  public static RadComponent getRadComponentAt(final RadRootContainer rootContainer, final int x, final int y){
+  public static RadComponent getRadComponentAt(final RadRootContainer rootContainer, final int x, final int y) {
    Point location = new Point(x, y);
    SwingUtilities.convertPointToScreen(location, rootContainer.getDelegee());
    Component c = getDeepestEmptyComponentAt(rootContainer.getDelegee(), location);
@@ -240,7 +240,7 @@ public final class FormEditingUtil {
    RadComponent result = null;

    while (c != null) {
-      if (c instanceof JComponent){
+      if (c instanceof JComponent) {
        final RadComponent component = (RadComponent)((JComponent)c).getClientProperty(RadComponent.CLIENT_PROP_RAD_COMPONENT);
        if (component != null) {

@@ -263,16 +263,16 @@ public final class FormEditingUtil {

  /**
   * @return component which has dragger. There is only one component with the dargger
-   * at a time.
+   *         at a time.
   */
  @Nullable
-  public static RadComponent getDraggerHost(@NotNull final GuiEditor editor){
+  public static RadComponent getDraggerHost(@NotNull final GuiEditor editor) {
    final Ref<RadComponent> result = new Ref<RadComponent>();
    iterate(
      editor.getRootContainer(),
      new ComponentVisitor<RadComponent>() {
        public boolean visit(final RadComponent component) {
-          if(component.hasDragger()){
+          if (component.hasDragger()) {
            result.set(component);
            return false;
          }
@@ -314,18 +314,18 @@ public final class FormEditingUtil {

  /**
   * @return currently selected components. Method returns the minimal amount of
-   * selected component which contains all selected components. It means that if the
-   * selected container contains some selected children then only this container
-   * will be added to the returned array.
+   *         selected component which contains all selected components. It means that if the
+   *         selected container contains some selected children then only this container
+   *         will be added to the returned array.
   */
  @NotNull
-  public static ArrayList<RadComponent> getSelectedComponents(@NotNull final GuiEditor editor){
+  public static ArrayList<RadComponent> getSelectedComponents(@NotNull final GuiEditor editor) {
    final ArrayList<RadComponent> result = new ArrayList<RadComponent>();
    calcSelectedComponentsImpl(result, editor.getRootContainer());
    return result;
  }

-  private static void calcSelectedComponentsImpl(final ArrayList<RadComponent> result, final RadContainer container){
+  private static void calcSelectedComponentsImpl(final ArrayList<RadComponent> result, final RadContainer container) {
    if (container.isSelected()) {
      if (container.getParent() != null) { // ignore RadRootContainer
        result.add(container);
@@ -350,7 +350,7 @@ public final class FormEditingUtil {
   * @return all selected component inside the <code>editor</code>
   */
  @NotNull
-  public static ArrayList<RadComponent> getAllSelectedComponents(@NotNull final GuiEditor editor){
+  public static ArrayList<RadComponent> getAllSelectedComponents(@NotNull final GuiEditor editor) {
    final ArrayList<RadComponent> result = new ArrayList<RadComponent>();
    iterate(
      editor.getRootContainer(),
@@ -373,8 +373,7 @@ public final class FormEditingUtil {
        return getExceptionMessage(cause);
      }
    }
-    else
-    if (ex instanceof InvocationTargetException) {
+    else if (ex instanceof InvocationTargetException) {
      final Throwable target = ((InvocationTargetException)ex).getTargetException();
      if (target != null && target != ex) {
        return getExceptionMessage(target);
@@ -382,10 +381,13 @@ public final class FormEditingUtil {
    }
    String message = ex.getMessage();
    if (ex instanceof ClassNotFoundException) {
-      message = message != null? UIDesignerBundle.message("error.class.not.found.N", message) : UIDesignerBundle.message("error.class.not.found");
+      message =
+        message != null ? UIDesignerBundle.message("error.class.not.found.N", message) : UIDesignerBundle.message("error.class.not.found");
    }
    else if (ex instanceof NoClassDefFoundError) {
-      message = message != null? UIDesignerBundle.message("error.required.class.not.found.N", message) : UIDesignerBundle.message("error.required.class.not.found");
+      message = message != null
+                ? UIDesignerBundle.message("error.required.class.not.found.N", message)
+                : UIDesignerBundle.message("error.required.class.not.found");
    }
    return message;
  }
@@ -394,14 +396,16 @@ public final class FormEditingUtil {
    return findComponentWithBinding(component, binding, null);
  }

-  public static IComponent findComponentWithBinding(IComponent component, final String binding, @Nullable final IComponent exceptComponent) {
+  public static IComponent findComponentWithBinding(IComponent component,
+                                                    final String binding,
+                                                    @Nullable final IComponent exceptComponent) {
    // Check that binding is unique
    final Ref<IComponent> boundComponent = new Ref<IComponent>();
    iterate(
      component,
      new ComponentVisitor() {
        public boolean visit(final IComponent component) {
-          if(component != exceptComponent && binding.equals(component.getBinding())) {
+          if (component != exceptComponent && binding.equals(component.getBinding())) {
            boundComponent.set(component);
            return false;
          }
@@ -419,10 +423,10 @@ public final class FormEditingUtil {
    RadComponent component = getRadComponentAt(rootContainer, x, y);
    if (isNullOrRoot(component) && epsilon > 0) {
      // try to find component near specified location
-      component = getRadComponentAt(rootContainer, x-epsilon, y-epsilon);
-      if (isNullOrRoot(component)) component = getRadComponentAt(rootContainer, x-epsilon, y+epsilon);
-      if (isNullOrRoot(component)) component = getRadComponentAt(rootContainer, x+epsilon, y-epsilon);
-      if (isNullOrRoot(component)) component = getRadComponentAt(rootContainer, x+epsilon, y+epsilon);
+      component = getRadComponentAt(rootContainer, x - epsilon, y - epsilon);
+      if (isNullOrRoot(component)) component = getRadComponentAt(rootContainer, x - epsilon, y + epsilon);
+      if (isNullOrRoot(component)) component = getRadComponentAt(rootContainer, x + epsilon, y - epsilon);
+      if (isNullOrRoot(component)) component = getRadComponentAt(rootContainer, x + epsilon, y + epsilon);
    }

    if (component != null) {
@@ -447,9 +451,9 @@ public final class FormEditingUtil {
  }

  public static IRootContainer getRoot(IComponent component) {
-    while(component != null) {
+    while (component != null) {
      if (component.getParentContainer() instanceof IRootContainer) {
-        return (IRootContainer) component.getParentContainer();
+        return (IRootContainer)component.getParentContainer();
      }
      component = component.getParentContainer();
    }
@@ -459,7 +463,7 @@ public final class FormEditingUtil {
  /**
   * Iterates component and its children (if any)
   */
-  public static void iterate(final IComponent component, final ComponentVisitor visitor){
+  public static void iterate(final IComponent component, final ComponentVisitor visitor) {
    iterateImpl(component, visitor);
  }

@@ -507,9 +511,9 @@ public final class FormEditingUtil {
  public static Locale[] collectUsedLocales(final Module module, final IRootContainer rootContainer) {
    final Set<Locale> locales = new HashSet<Locale>();
    final PropertiesReferenceManager propManager = PropertiesReferenceManager.getInstance(module.getProject());
-    for(String bundleName: collectUsedBundleNames(rootContainer)) {
+    for (String bundleName : collectUsedBundleNames(rootContainer)) {
      List<PropertiesFile> propFiles = propManager.findPropertiesFiles(module, bundleName.replace('/', '.'));
-      for(PropertiesFile propFile: propFiles) {
+      for (PropertiesFile propFile : propFiles) {
        locales.add(propFile.getLocale());
      }
    }
@@ -528,9 +532,9 @@ public final class FormEditingUtil {
      public void run() {
        if (!GridChangeUtil.canDeleteCells(container, cells, isRow)) {
          Set<RadComponent> componentsInColumn = new HashSet<RadComponent>();
-          for(RadComponent component: container.getComponents()) {
+          for (RadComponent component : container.getComponents()) {
            GridConstraints c = component.getConstraints();
-            for(int cell: cells) {
+            for (int cell : cells) {
              if (c.contains(isRow, cell)) {
                componentsInColumn.add(component);
                break;
@@ -545,7 +549,7 @@ public final class FormEditingUtil {

            final int rc = Messages.showYesNoDialog(editor, message,
                                                    isRow ? UIDesignerBundle.message("delete.row.title")
-                                                    : UIDesignerBundle.message("delete.column.title"), Messages.getQuestionIcon());
+                                                          : UIDesignerBundle.message("delete.column.title"), Messages.getQuestionIcon());
            if (rc != DialogWrapper.OK_EXIT_CODE) {
              return;
            }
@@ -554,7 +558,7 @@ public final class FormEditingUtil {
          }
        }

-        for(int cell: cells) {
+        for (int cell : cells) {
          container.getGridLayoutManager().deleteGridCells(container, cell, isRow);
        }
        editor.refreshAndSave(true);
@@ -566,8 +570,8 @@ public final class FormEditingUtil {
  }

  /**
+   * @param rootContainer
   * @return id
-     * @param rootContainer
   */
  public static String generateId(final RadRootContainer rootContainer) {
    while (true) {
@@ -582,9 +586,9 @@ public final class FormEditingUtil {
   * @return {@link com.intellij.uiDesigner.designSurface.GuiEditor} from the context. Can be <code>null</code>.
   */
  @Nullable
-  public static GuiEditor getEditorFromContext(@NotNull final DataContext context){
+  public static GuiEditor getEditorFromContext(@NotNull final DataContext context) {
    final FileEditor editor = PlatformDataKeys.FILE_EDITOR.getData(context);
-    if(editor instanceof UIFormEditor){
+    if (editor instanceof UIFormEditor) {
      return ((UIFormEditor)editor).getEditor();
    }
    else {
@@ -592,7 +596,8 @@ public final class FormEditingUtil {
    }
  }

-  @Nullable public static GuiEditor getActiveEditor(final DataContext context){
+  @Nullable
+  public static GuiEditor getActiveEditor(final DataContext context) {
    Project project = PlatformDataKeys.PROJECT.getData(context);
    if (project == null) {
      return null;
@@ -605,11 +610,10 @@ public final class FormEditingUtil {
  }

  /**
-   *
   * @param componentToAssignBinding
   * @param binding
-   * @param component topmost container where to find duplicate binding. In most cases
-   * it should be {@link com.intellij.uiDesigner.designSurface.GuiEditor#getRootContainer()}
+   * @param component                topmost container where to find duplicate binding. In most cases
+   *                                 it should be {@link com.intellij.uiDesigner.designSurface.GuiEditor#getRootContainer()}
   */
  public static boolean isBindingUnique(
    final IComponent componentToAssignBinding,
@@ -633,7 +637,7 @@ public final class FormEditingUtil {
  @Nullable
  public static RadContainer getSelectionParent(final List<RadComponent> selection) {
    RadContainer parent = null;
-    for(RadComponent c: selection) {
+    for (RadComponent c : selection) {
      if (parent == null) {
        parent = c.getParent();
      }
@@ -651,17 +655,17 @@ public final class FormEditingUtil {
    int maxRow = 0;
    int maxCol = 0;

-    for(RadComponent c: selection) {
+    for (RadComponent c : selection) {
      minRow = Math.min(minRow, c.getConstraints().getRow());
      minCol = Math.min(minCol, c.getConstraints().getColumn());
      maxRow = Math.max(maxRow, c.getConstraints().getRow() + c.getConstraints().getRowSpan());
      maxCol = Math.max(maxCol, c.getConstraints().getColumn() + c.getConstraints().getColSpan());
    }
-    return new Rectangle(minCol, minRow, maxCol-minCol, maxRow-minRow);
+    return new Rectangle(minCol, minRow, maxCol - minCol, maxRow - minRow);
  }

  public static boolean isComponentSwitchedInView(@NotNull RadComponent component) {
-    while(component.getParent() != null) {
+    while (component.getParent() != null) {
      if (!component.getParent().getLayoutManager().isSwitchedToChild(component.getParent(), component)) {
        return false;
      }
@@ -680,7 +684,7 @@ public final class FormEditingUtil {
  public static boolean selectComponent(final GuiEditor editor, @NotNull final RadComponent component) {
    boolean hasTab = false;
    RadComponent parent = component;
-    while(parent.getParent() != null) {
+    while (parent.getParent() != null) {
      if (parent.getParent().getLayoutManager().switchContainerToChild(parent.getParent(), parent)) {
        hasTab = true;
      }
@@ -724,8 +728,8 @@ public final class FormEditingUtil {
      }
      builder.beginUpdateSelection();
      try {
-        clearSelection((RadContainer) getRoot(component));
-        for(RadComponent aComponent: components) {
+        clearSelection((RadContainer)getRoot(component));
+        for (RadComponent aComponent : components) {
          selectComponent(editor, aComponent);
        }
      }
@@ -736,12 +740,12 @@ public final class FormEditingUtil {
  }

  public static boolean isDropOnChild(final DraggedComponentList draggedComponentList,
-                                       final ComponentDropLocation location) {
+                                      final ComponentDropLocation location) {
    if (location.getContainer() == null) {
      return false;
    }

-    for(RadComponent component: draggedComponentList.getComponents()) {
+    for (RadComponent component : draggedComponentList.getComponents()) {
      if (isChild(location.getContainer(), component)) {
        return true;
      }
@@ -750,7 +754,7 @@ public final class FormEditingUtil {
  }

  private static boolean isChild(RadContainer maybeChild, RadComponent maybeParent) {
-    while(maybeChild != null) {
+    while (maybeChild != null) {
      if (maybeParent == maybeChild) {
        return true;
      }
@@ -779,30 +783,31 @@ public final class FormEditingUtil {

  public static int adjustForGap(final RadContainer container, final int cellIndex, final boolean isRow, final int delta) {
    if (container.getGridLayoutManager().isGapCell(container, isRow, cellIndex)) {
-      return cellIndex+delta;
+      return cellIndex + delta;
    }
    return cellIndex;
  }

  public static int prevRow(final RadContainer container, final int row) {
-    return adjustForGap(container, row-1, true, -1);
+    return adjustForGap(container, row - 1, true, -1);
  }

  public static int nextRow(final RadContainer container, final int row) {
-    return adjustForGap(container, row+1, true, 1);
+    return adjustForGap(container, row + 1, true, 1);
  }

  public static int prevCol(final RadContainer container, final int col) {
-    return adjustForGap(container, col-1, false, -1);
+    return adjustForGap(container, col - 1, false, -1);
  }

  public static int nextCol(final RadContainer container, final int col) {
-    return adjustForGap(container, col+1, false, 1);
+    return adjustForGap(container, col + 1, false, 1);
  }

-  @Nullable public static IButtonGroup findGroupForComponent(final IRootContainer radRootContainer, @NotNull final IComponent component) {
-    for(IButtonGroup group: radRootContainer.getButtonGroups()) {
-      for(String id: group.getComponentIds()) {
+  @Nullable
+  public static IButtonGroup findGroupForComponent(final IRootContainer radRootContainer, @NotNull final IComponent component) {
+    for (IButtonGroup group : radRootContainer.getButtonGroups()) {
+      for (String id : group.getComponentIds()) {
        if (component.getId().equals(id)) {
          return group;
        }
@@ -812,7 +817,7 @@ public final class FormEditingUtil {
  }

  public static void remapToActionTargets(final List<RadComponent> selection) {
-    for(int i=0; i<selection.size(); i++) {
+    for (int i = 0; i < selection.size(); i++) {
      final RadComponent c = selection.get(i);
      if (c.getParent() != null) {
        selection.set(i, c.getParent().getActionTargetComponent(c));
@@ -868,7 +873,7 @@ public final class FormEditingUtil {
    });
  }

-  public static void clearSelection(@NotNull final RadContainer container){
+  public static void clearSelection(@NotNull final RadContainer container) {
    container.setSelected(false);

    for (int i = 0; i < container.getComponentCount(); i++) {
@@ -887,6 +892,7 @@ public final class FormEditingUtil {
   * <code>container</code>. The method goes recursively through the hierarchy
   * of components. Note, that if <code>container</code> itself has <code>id</code>
   * then the method immediately retuns it.
+   *
   * @return the found component.
   */
  @Nullable
@@ -899,9 +905,9 @@ public final class FormEditingUtil {
    }

    final IContainer uiContainer = (IContainer)component;
-    for (int i=0; i < uiContainer.getComponentCount(); i++){
+    for (int i = 0; i < uiContainer.getComponentCount(); i++) {
      final IComponent found = findComponent(uiContainer.getComponent(i), id);
-      if (found != null){
+      if (found != null) {
        return found;
      }
    }
@@ -914,7 +920,7 @@ public final class FormEditingUtil {
      .findClass(classToBindName.replace('$', '.'), module.getModuleWithDependenciesScope());
  }

-  public interface ComponentVisitor <Type extends IComponent>{
+  public interface ComponentVisitor<Type extends IComponent> {
    /**
     * @return true if iteration should continue
     */
@@ -75,7 +75,7 @@ public final class Painter {
  private Painter() {
  }

-  public static void paintComponentDecoration(final GuiEditor editor, final RadComponent component, final Graphics g){
+  public static void paintComponentDecoration(final GuiEditor editor, final RadComponent component, final Graphics g) {
    // Collect selected components and paint decoration for non selected components
    final ArrayList<RadComponent> selection = new ArrayList<RadComponent>();
    final Rectangle layeredPaneRect = editor.getLayeredPane().getVisibleRect();
@@ -83,24 +83,24 @@ public final class Painter {
      component,
      new FormEditingUtil.ComponentVisitor<RadComponent>() {
        public boolean visit(final RadComponent component) {
-          if(!component.getDelegee().isShowing()){ // Skip invisible components
+          if (!component.getDelegee().isShowing()) { // Skip invisible components
            return true;
          }
          final Shape oldClip = g.getClip();
          final RadContainer parent = component.getParent();
-          if(parent != null){
+          if (parent != null) {
            final Point p = SwingUtilities.convertPoint(component.getDelegee(), 0, 0, editor.getLayeredPane());
            final Rectangle visibleRect = layeredPaneRect.intersection(new Rectangle(p.x, p.y, parent.getWidth(), parent.getHeight()));
            g.setClip(visibleRect);
          }
-          if(component.isSelected()){ // we will paint selection later
+          if (component.isSelected()) { // we will paint selection later
            selection.add(component);
          }
-          else{
+          else {
            paintComponentBoundsImpl(editor, component, g);
          }
          paintGridOutline(editor, component, g);
-          if(parent != null){
+          if (parent != null) {
            g.setClip(oldClip);
          }
          return true;
@@ -109,17 +109,17 @@ public final class Painter {
    );

    // Let's paint decoration for selected components
-    for(int i = selection.size() - 1; i >= 0; i--){
+    for (int i = selection.size() - 1; i >= 0; i--) {
      final Shape oldClip = g.getClip();
      final RadComponent c = selection.get(i);
      final RadContainer parent = c.getParent();
-      if(parent != null){
+      if (parent != null) {
        final Point p = SwingUtilities.convertPoint(c.getDelegee(), 0, 0, editor.getLayeredPane());
        final Rectangle visibleRect = layeredPaneRect.intersection(new Rectangle(p.x, p.y, parent.getWidth(), parent.getHeight()));
        g.setClip(visibleRect);
      }
      paintComponentBoundsImpl(editor, c, g);
-      if(parent != null){
+      if (parent != null) {
        g.setClip(oldClip);
      }
    }
@@ -131,15 +131,15 @@ public final class Painter {
   * Method does nothing if the <code>component</code> is not an instance
   * of <code>RadContainer</code>.
   */
-  private static void paintComponentBoundsImpl(final GuiEditor editor, @NotNull final RadComponent component, final Graphics g){
-    if (!(component instanceof RadContainer) && !(component instanceof RadNestedForm) && !component.isDragBorder()){
+  private static void paintComponentBoundsImpl(final GuiEditor editor, @NotNull final RadComponent component, final Graphics g) {
+    if (!(component instanceof RadContainer) && !(component instanceof RadNestedForm) && !component.isDragBorder()) {
      return;
    }

    boolean highlightBoundaries = (getDesignTimeInsets(component) > 2);

    if (component instanceof RadContainer && !component.isDragBorder()) {
-      RadContainer container = (RadContainer) component;
+      RadContainer container = (RadContainer)component;
      if (!highlightBoundaries && (container.getBorderTitle() != null || container.getBorderType() != BorderType.NONE)) {
        return;
      }
@@ -151,9 +151,9 @@ public final class Painter {
      editor.getRootContainer().getDelegee()
    );
    g.translate(point.x, point.y);
-    try{
+    try {
      if (component.isDragBorder()) {
-        Graphics2D g2d = (Graphics2D) g;
+        Graphics2D g2d = (Graphics2D)g;
        g2d.setColor(LightColors.YELLOW);
        g2d.setStroke(new BasicStroke(2.0f));
        g2d.translate(1, 1);
@@ -171,13 +171,14 @@ public final class Painter {
      if (component.isDragBorder()) {
        g.translate(-1, -1);
      }
-    }finally{
+    }
+    finally {
      g.translate(-point.x, -point.y);
    }
  }

  private static int getDesignTimeInsets(RadComponent component) {
-    while(component != null) {
+    while (component != null) {
      Integer designTimeInsets = (Integer)component.getDelegee().getClientProperty(GridLayoutManager.DESIGN_TIME_INSETS);
      if (designTimeInsets != null) {
        return designTimeInsets.intValue();
@@ -190,15 +191,15 @@ public final class Painter {
  /**
   * This method paints grid bounds for "grid" containers
   */
-  public static void paintGridOutline(final GuiEditor editor, @NotNull final RadComponent component, final Graphics g){
+  public static void paintGridOutline(final GuiEditor editor, @NotNull final RadComponent component, final Graphics g) {
    if (!editor.isShowGrid()) {
      return;
    }
-    if (!(component instanceof RadContainer)){
+    if (!(component instanceof RadContainer)) {
      return;
    }
    final RadContainer container = (RadContainer)component;
-    if(!container.getLayoutManager().isGrid()){
+    if (!container.getLayoutManager().isGrid()) {
      return;
    }

@@ -218,13 +219,14 @@ public final class Painter {
      editor.getRootContainer().getDelegee()
    );
    g.translate(point.x, point.y);
-    try{
+    try {
      // Paint grid
      if (container.getWidth() > 0 && container.getHeight() > 0) {
        Image gridImage = CachedGridImage.getGridImage(container);
        g.drawImage(gridImage, 0, 0, null);
      }
-    }finally{
+    }
+    finally {
      g.translate(-point.x, -point.y);
    }
  }
@@ -233,7 +235,7 @@ public final class Painter {
   * Paints selection for the specified <code>component</code>.
   */
  public static void paintSelectionDecoration(@NotNull RadComponent component, Graphics g,
-                                              boolean focused){
+                                              boolean focused) {
    if (component.isSelected()) {
      if (focused) {
        g.setColor(Color.BLUE);
@@ -246,6 +248,22 @@ public final class Painter {
        g.fillRect(point.x - R, point.y - R, 2 * R + 1, 2 * R + 1);
      }
    }
+    else if (component.getWidth() < FormEditingUtil.EMPTY_COMPONENT_SIZE || component.getHeight() < FormEditingUtil.EMPTY_COMPONENT_SIZE) {
+      Graphics2D g2d = (Graphics2D)g;
+      Composite oldComposite = g2d.getComposite();
+      Stroke oldStroke = g2d.getStroke();
+      Color oldColor = g2d.getColor();
+
+      g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, 0.5f));
+      g2d.setStroke(new BasicStroke(0.7f));
+      g2d.setColor(Color.black);
+      g2d.drawRect(0, 0, Math.max(component.getWidth(), FormEditingUtil.EMPTY_COMPONENT_SIZE),
+                   Math.max(component.getHeight(), FormEditingUtil.EMPTY_COMPONENT_SIZE));
+
+      g2d.setComposite(oldComposite);
+      g2d.setStroke(oldStroke);
+      g2d.setColor(oldColor);
+    }
  }

  /**
@@ -264,36 +282,36 @@ public final class Painter {
    }
    */

-    final int width=component.getWidth();
-    final int height=component.getHeight();
+    final int width = component.getWidth();
+    final int height = component.getHeight();

    final Point[] points = getPoints(width, height);

    if (isInside(x, y, points[SE])) {
      return EAST_MASK | SOUTH_MASK;
    }
-    else if (isInside(x,y,points[NW])) {
+    else if (isInside(x, y, points[NW])) {
      return WEST_MASK | NORTH_MASK;
    }
-    else if(isInside(x,y,points[N])){
+    else if (isInside(x, y, points[N])) {
      return NORTH_MASK;
    }
-    else if(isInside(x,y,points[NE])){
+    else if (isInside(x, y, points[NE])) {
      return EAST_MASK | NORTH_MASK;
    }
-    else if (isInside(x, y, points[W])){
+    else if (isInside(x, y, points[W])) {
      return WEST_MASK;
    }
-    else if (isInside(x, y, points[E])){
+    else if (isInside(x, y, points[E])) {
      return EAST_MASK;
    }
-    else if (isInside(x, y, points[SW])){
+    else if (isInside(x, y, points[SW])) {
      return WEST_MASK | SOUTH_MASK;
    }
-    else if (isInside(x, y, points[S])){
+    else if (isInside(x, y, points[S])) {
      return SOUTH_MASK;
    }
-    else{
+    else {
      return 0;
    }
  }
@@ -303,7 +321,7 @@ public final class Painter {
  }

  @JdkConstants.CursorType
-  public static int getResizeCursor(final int resizeMask){
+  public static int getResizeCursor(final int resizeMask) {
    if (resizeMask == (WEST_MASK | NORTH_MASK)) {
      return Cursor.NW_RESIZE_CURSOR;
    }
@@ -354,13 +372,13 @@ public final class Painter {
    Rectangle[] allBounds = new Rectangle[components.size()];
    int lastTop = -1;
    int minLeft = Integer.MAX_VALUE;
-    for(int i=0; i<components.size(); i++) {
+    for (int i = 0; i < components.size(); i++) {
      final Rectangle rc = SwingUtilities.convertRectangle(
        components.get(i).getParent().getDelegee(),
        components.get(i).getBounds(),
        rootContainer.getDelegee()
      );
-      allBounds [i] = rc;
+      allBounds[i] = rc;

      minLeft = Math.min(minLeft, rc.x);
      if (i == 0) {
@@ -371,7 +389,7 @@ public final class Painter {
      }
    }

-    Graphics2D g2d = (Graphics2D) g;
+    Graphics2D g2d = (Graphics2D)g;
    Stroke oldStroke = g2d.getStroke();
    g2d.setStroke(new BasicStroke(2.0f));
    g2d.setColor(new Color(104, 107, 130));
@@ -379,42 +397,42 @@ public final class Painter {
      // all items in group have same Y
      int left = Integer.MAX_VALUE;
      int right = Integer.MIN_VALUE;
-      for(Rectangle rc: allBounds) {
+      for (Rectangle rc : allBounds) {
        final int midX = (int)rc.getCenterX();
        left = Math.min(left, midX);
        right = Math.max(right, midX);
-        g2d.drawLine(midX, lastTop-8, midX, lastTop);
+        g2d.drawLine(midX, lastTop - 8, midX, lastTop);
      }
-      g2d.drawLine(left, lastTop-8, right, lastTop-8);
+      g2d.drawLine(left, lastTop - 8, right, lastTop - 8);
    }
    else {
      int top = Integer.MAX_VALUE;
      int bottom = Integer.MIN_VALUE;
-      for(Rectangle rc: allBounds) {
+      for (Rectangle rc : allBounds) {
        final int midY = (int)rc.getCenterY();
        top = Math.min(top, midY);
        bottom = Math.max(bottom, midY);
-        g2d.drawLine(minLeft-8, midY, rc.x, midY);
+        g2d.drawLine(minLeft - 8, midY, rc.x, midY);
      }
-      g2d.drawLine(minLeft-8, top, minLeft-8, bottom);
+      g2d.drawLine(minLeft - 8, top, minLeft - 8, bottom);
    }
    g2d.setStroke(oldStroke);
  }

  public static void paintComponentTag(final RadComponent component, final Graphics g) {
    if (component instanceof RadContainer) return;
-    for(IProperty prop: component.getModifiedProperties()) {
+    for (IProperty prop : component.getModifiedProperties()) {
      if (prop.getName().equals(SwingProperties.TEXT)) {
        final Object desc = prop.getPropertyValue(component);
-        if (!(desc instanceof StringDescriptor) || ((StringDescriptor) desc).getValue() == null ||
-            ((StringDescriptor) desc).getValue().length() > 0) {
+        if (!(desc instanceof StringDescriptor) || ((StringDescriptor)desc).getValue() == null ||
+            ((StringDescriptor)desc).getValue().length() > 0) {
          return;
        }
      }
      else if (prop.getName().equals(SwingProperties.MODEL)) {
        // don't paint tags on non-empty lists
        final Object value = prop.getPropertyValue(component);
-        if (value instanceof String[] && ((String[]) value).length > 0) {
+        if (value instanceof String[] && ((String[])value).length > 0) {
          return;
        }
      }
@@ -429,15 +447,15 @@ public final class Painter {
      String className = component.getComponentClassName();
      int pos = className.lastIndexOf('.');
      if (pos >= 0) {
-        tagBuilder.append(className.substring(pos+1));
+        tagBuilder.append(className.substring(pos + 1));
      }
      else {
        tagBuilder.append(className);
      }
      final Rectangle2D stringBounds = g.getFontMetrics().getStringBounds(tagBuilder.toString(), g);
-      Graphics2D g2d = (Graphics2D) g;
+      Graphics2D g2d = (Graphics2D)g;
      g2d.setColor(Color.BLUE);
-      g2d.fillRect(0, 0, (int) stringBounds.getWidth(), (int) stringBounds.getHeight());
+      g2d.fillRect(0, 0, (int)stringBounds.getWidth(), (int)stringBounds.getHeight());
      g2d.setColor(Color.WHITE);
      g.drawString(tagBuilder.toString(), 0, g.getFontMetrics().getAscent());
    }