Java 类com.intellij.util.ui.EmptyIcon 实例源码

项目：intellij-ce-playground 文件：ImportFromSourcesTestCase.java

protected void importFromSources(File dir) {
  myRootDir = dir;
  try {
    myProject = doCreateProject(getIprFile());
    myBuilder.setBaseProjectPath(dir.getAbsolutePath());
    List<DetectedRootData> list = RootDetectionProcessor.detectRoots(dir);
    MultiMap<ProjectStructureDetector,DetectedProjectRoot> map = RootDetectionProcessor.createRootsMap(list);
    myBuilder.setupProjectStructure(map);
    for (ProjectStructureDetector detector : map.keySet()) {
      List<ModuleWizardStep> steps = detector.createWizardSteps(myBuilder, myBuilder.getProjectDescriptor(detector), EmptyIcon.ICON_16);
      for (ModuleWizardStep step : steps) {
        if (step instanceof AbstractStepWithProgress<?>) {
          performStep((AbstractStepWithProgress<?>)step);
        }
      }
    }
    myBuilder.commit(myProject, null, ModulesProvider.EMPTY_MODULES_PROVIDER);
  }
  catch (Exception e) {
    throw new RuntimeException(e);
  }
}

项目：intellij-ce-playground 文件：ImportStaticLookupActionProvider.java

@Override
public void fillActions(final LookupElement element, Lookup lookup, Consumer<LookupElementAction> consumer) {
  final StaticallyImportable item = element.as(StaticallyImportable.CLASS_CONDITION_KEY);
  if (item == null || !item.canBeImported()) {
    return;
  }

  final Icon checkIcon = PlatformIcons.CHECK_ICON;
  final Icon icon = item.willBeImported() ? checkIcon : new EmptyIcon(checkIcon.getIconWidth(), checkIcon.getIconHeight());
  consumer.consume(new LookupElementAction(icon, "Import statically") {
    @Override
    public Result performLookupAction() {
      item.setShouldBeImported(!item.willBeImported());
      return new Result.ChooseItem(element);
    }
  });
}

项目：intellij-ce-playground 文件：GtkMenuItemUI.java

@Override
public void update(final Graphics g, final JComponent c) {
  myHiddenItem.setSelected(menuItem.isSelected());

  if (UIUtil.isMurrineBasedTheme()) {
    acceleratorFont = menuItem.getFont();
    final Color fg = GtkPaintingUtil.getForeground(myOriginalUI, menuItem);
    acceleratorForeground = UIUtil.mix(fg, menuItem.getBackground(), menuItem.isSelected() ? 0.4 : 0.2);
    disabledForeground = fg;
  }
  if (checkIcon != null && !(checkIcon instanceof IconWrapper) && !(checkIcon instanceof EmptyIcon)) {
    checkIcon = new IconWrapper(checkIcon, myOriginalUI);
  }

  super.update(g, c);
}

项目：intellij-ce-playground 文件：LightToolWindow.java

public ActionButton(AnAction action) {
  myAction = action;

  Presentation presentation = action.getTemplatePresentation();
  InplaceButton button = new InplaceButton(KeymapUtil.createTooltipText(presentation.getText(), action), EmptyIcon.ICON_16, this) {
    @Override
    public boolean isActive() {
      return LightToolWindow.this.isActive();
    }
  };
  button.setHoveringEnabled(!SystemInfo.isMac);
  setContent(button);

  Icon icon = presentation.getIcon();
  Icon hoveredIcon = presentation.getHoveredIcon();
  button.setIcons(icon, icon, hoveredIcon == null ? icon : hoveredIcon);
}

项目：intellij-ce-playground 文件：RecentProjectsManagerBase.java

protected static Icon getSmallApplicationIcon() {
  if (ourSmallAppIcon == null) {
    try {
      Icon appIcon = IconLoader.findIcon(ApplicationInfoEx.getInstanceEx().getIconUrl());

      if (appIcon != null) {
        if (appIcon.getIconWidth() == JBUI.scale(16) && appIcon.getIconHeight() == JBUI.scale(16)) {
          ourSmallAppIcon = appIcon;
        } else {
          BufferedImage image = ImageUtil.toBufferedImage(IconUtil.toImage(appIcon));
          image = Scalr.resize(image, Scalr.Method.ULTRA_QUALITY, UIUtil.isRetina() ? 32 : JBUI.scale(16));
          ourSmallAppIcon = toRetinaAwareIcon(image);
        }
      }
    }
    catch (Exception e) {//
    }
    if (ourSmallAppIcon == null) {
      ourSmallAppIcon = EmptyIcon.ICON_16;
    }
  }

  return ourSmallAppIcon;
}

项目：intellij-ce-playground 文件：AdvancedSettingsAction.java

private static int calculateCheckBoxIndent() {
  JCheckBox checkBox = new JCheckBox();
  Icon icon = checkBox.getIcon();
  int indent = 0;
  if (icon == null) {
    icon = UIManager.getIcon("CheckBox.icon");
  }
  if (UIUtil.isUnderDarcula() || UIUtil.isUnderIntelliJLaF()) {
    icon = EmptyIcon.create(20, 18);
  }
  if (icon != null) {
    final Rectangle r1 = new Rectangle(checkBox.getWidth(), checkBox.getHeight());
    JBInsets.removeFrom(r1, checkBox.getInsets());
    final Rectangle iconRect = new Rectangle();
    SwingUtilities.layoutCompoundLabel(
      checkBox, checkBox.getFontMetrics(checkBox.getFont()), checkBox.getText(), icon,
      checkBox.getVerticalAlignment(), checkBox.getHorizontalAlignment(),
      checkBox.getVerticalTextPosition(), checkBox.getHorizontalTextPosition(),
      r1, new Rectangle(), iconRect,
      checkBox.getText() == null ? 0 : checkBox.getIconTextGap());
    indent = iconRect.x;
  }
  return indent + checkBox.getIconTextGap();
}

项目：intellij-ce-playground 文件：SearchEverywhereAction.java

public void recalculateWidth() {
  ListModel model = myList.getModel();
  myTitle.setIcon(EmptyIcon.ICON_16);
  myTitle.setFont(getTitleFont());
  int index = 0;
  while (index < model.getSize()) {
    String title = getModel().titleIndex.getTitle(index);
    if (title != null) {
      myTitle.setText(title);
    }
    index++;
  }

  myTitle.setForeground(Gray._122);
  myTitle.setAlignmentY(BOTTOM_ALIGNMENT);
}

项目：tools-idea 文件：ImportStaticLookupActionProvider.java

@Override
public void fillActions(final LookupElement element, Lookup lookup, Consumer<LookupElementAction> consumer) {
  final StaticallyImportable item = element.as(StaticallyImportable.CLASS_CONDITION_KEY);
  if (item == null || !item.canBeImported()) {
    return;
  }

  final Icon checkIcon = PlatformIcons.CHECK_ICON;
  final Icon icon = item.willBeImported() ? checkIcon : new EmptyIcon(checkIcon.getIconWidth(), checkIcon.getIconHeight());
  consumer.consume(new LookupElementAction(icon, "Import statically") {
    @Override
    public Result performLookupAction() {
      item.setShouldBeImported(!item.willBeImported());
      return new Result.ChooseItem(element);
    }
  });
}

项目：tools-idea 文件：GtkMenuItemUI.java

@Override
public void update(final Graphics g, final JComponent c) {
  myHiddenItem.setSelected(menuItem.isSelected());

  if (UIUtil.isMurrineBasedTheme()) {
    acceleratorFont = menuItem.getFont();
    final Color fg = GtkPaintingUtil.getForeground(myOriginalUI, menuItem);
    acceleratorForeground = UIUtil.mix(fg, menuItem.getBackground(), menuItem.isSelected() ? 0.4 : 0.2);
    disabledForeground = fg;
  }
  if (checkIcon != null && !(checkIcon instanceof IconWrapper) && !(checkIcon instanceof EmptyIcon)) {
    checkIcon = new IconWrapper(checkIcon, myOriginalUI);
  }

  super.update(g, c);
}

项目：tools-idea 文件：SearchEverywhereAction.java

public void recalculateWidth() {
  myLeftWidth = 16;
  ListModel model = myList.getModel();
  myTitle.setIcon(EmptyIcon.ICON_16);
  myTitle.setFont(getTitleFont());
  int index = 0;
  while (index < model.getSize()) {
    Object el = model.getElementAt(index);
    Object prev = index == 0 ? null : model.getElementAt(index - 1);
    String title = getTitle(index, el, prev);
    if (title != null) {
      myTitle.setText(title);
      myLeftWidth = Math.max(myLeftWidth, myTitle.getPreferredSize().width);
    }
    index++;
  }

  myLeftWidth += 10;
  myTitle.setForeground(Gray._122);
  myTitle.setAlignmentY(BOTTOM_ALIGNMENT);
  myLeftPanel.setBorder(new CompoundBorder(new CustomLineBorder(Gray._206, 0,0,0,1), new EmptyBorder(0,0,0,5)));
}

项目：tools-idea 文件：LightToolWindow.java

public ActionButton(AnAction action) {
  myAction = action;

  Presentation presentation = action.getTemplatePresentation();
  InplaceButton button = new InplaceButton(AnAction.createTooltipText(presentation.getText(), action), EmptyIcon.ICON_16, this) {
    @Override
    public boolean isActive() {
      return LightToolWindow.this.isActive();
    }
  };
  button.setHoveringEnabled(!SystemInfo.isMac);
  setContent(button);

  Icon icon = presentation.getIcon();
  Icon hoveredIcon = presentation.getHoveredIcon();
  button.setIcons(icon, icon, hoveredIcon == null ? icon : hoveredIcon);
}

项目：cordovastudio 文件：LightToolWindow.java

public ActionButton(AnAction action) {
  myAction = action;

  Presentation presentation = action.getTemplatePresentation();
  InplaceButton button = new InplaceButton(KeymapUtil.createTooltipText(presentation.getText(), action), EmptyIcon.ICON_16, this) {
    @Override
    public boolean isActive() {
      return LightToolWindow.this.isActive();
    }
  };
  button.setHoveringEnabled(!SystemInfo.isMac);
  setContent(button);

  Icon icon = presentation.getIcon();
  Icon hoveredIcon = presentation.getHoveredIcon();
  button.setIcons(icon, icon, hoveredIcon == null ? icon : hoveredIcon);
}

项目：consulo 文件：IconDescriptor.java

@Nonnull
public Icon toIcon() {
  Icon mainIcon = null;
  if(myLayerIcons == null) {
    mainIcon = myMainIcon;
  }
  else {
    LayeredIcon layeredIcon = new LayeredIcon(myLayerIcons.size() + 1);
    layeredIcon.setIcon(myMainIcon, 0);
    for (int i = 0; i < myLayerIcons.size(); i++) {
      Icon icon = myLayerIcons.get(i);
      layeredIcon.setIcon(icon, i + 1);
    }
    mainIcon = layeredIcon;
  }

  if(myRightIcon == null) {
    return mainIcon == null ? EmptyIcon.ICON_16 : mainIcon;
  }
  else {
    RowIcon baseIcon = new RowIcon(2);
    baseIcon.setIcon(mainIcon, 0);
    baseIcon.setIcon(myRightIcon, 1);
    return baseIcon;
  }
}

项目：consulo 文件：PresentationModeProgressPanel.java

public PresentationModeProgressPanel(InlineProgressIndicator progress) {
  myProgress = progress;
  Font font = JBUI.Fonts.label(11);
  myText.setFont(font);
  myText2.setFont(font);
  myText.setIcon(JBUI.scale(EmptyIcon.create(1, 16)));
  myText2.setIcon(JBUI.scale(EmptyIcon.create(1, 16)));
  myUpdateQueue = new MergingUpdateQueue("Presentation Mode Progress", 100, true, null);
  myUpdate = new Update("Update UI") {
    @Override
    public void run() {
      updateImpl();
    }
  };
  myEastButtons = myProgress.createEastButtons();
  myButtonPanel.add(InlineProgressIndicator.createButtonPanel(myEastButtons.map(b -> b.button)));
}

项目：consulo 文件：PopupFactoryImpl.java

private void calcMaxIconSize(final ActionGroup actionGroup) {
  AnAction[] actions = actionGroup.getChildren(createActionEvent(actionGroup));
  for (AnAction action : actions) {
    if (action == null) continue;
    if (action instanceof ActionGroup) {
      final ActionGroup group = (ActionGroup)action;
      if (!group.isPopup()) {
        calcMaxIconSize(group);
        continue;
      }
    }

    Icon icon = action.getTemplatePresentation().getIcon();
    if (icon == null && action instanceof Toggleable) icon = EmptyIcon.ICON_16;
    if (icon != null) {
      final int width = icon.getIconWidth();
      final int height = icon.getIconHeight();
      if (myMaxIconWidth < width) {
        myMaxIconWidth = width;
      }
      if (myMaxIconHeight < height) {
        myMaxIconHeight = height;
      }
    }
  }
}

项目：consulo 文件：GtkMenuItemUI.java

@Override
public void update(final Graphics g, final JComponent c) {
  myHiddenItem.setSelected(menuItem.isSelected());

  if (UIUtil.isMurrineBasedTheme()) {
    acceleratorFont = menuItem.getFont();
    final Color fg = GtkPaintingUtil.getForeground(myOriginalUI, menuItem);
    acceleratorForeground = UIUtil.mix(fg, menuItem.getBackground(), menuItem.isSelected() ? 0.4 : 0.2);
    disabledForeground = fg;
  }
  if (checkIcon != null && !(checkIcon instanceof IconWrapper) && !(checkIcon instanceof EmptyIcon)) {
    checkIcon = new IconWrapper(checkIcon, myOriginalUI);
  }

  super.update(g, c);
}

项目：consulo 文件：LightToolWindow.java

public ActionButton(AnAction action) {
  myAction = action;

  Presentation presentation = action.getTemplatePresentation();
  InplaceButton button = new InplaceButton(KeymapUtil.createTooltipText(presentation.getText(), action), EmptyIcon.ICON_16, this) {
    @Override
    public boolean isActive() {
      return LightToolWindow.this.isActive();
    }
  };
  button.setHoveringEnabled(!SystemInfo.isMac);
  setContent(button);

  Icon icon = presentation.getIcon();
  Icon hoveredIcon = presentation.getHoveredIcon();
  button.setIcons(icon, icon, hoveredIcon == null ? icon : hoveredIcon);
}

项目：consulo 文件：SearchEverywhereAction.java

public void recalculateWidth() {
  ListModel model = myList.getModel();
  myTitle.setIcon(EmptyIcon.ICON_16);
  myTitle.setFont(getTitleFont());
  int index = 0;
  while (index < model.getSize()) {
    String title = getModel().titleIndex.getTitle(index);
    if (title != null) {
      myTitle.setText(title);
    }
    index++;
  }

  myTitle.setForeground(Gray._122);
  myTitle.setAlignmentY(BOTTOM_ALIGNMENT);
}

项目：consulo-java 文件：ImportStaticLookupActionProvider.java

@Override
public void fillActions(final LookupElement element, Lookup lookup, Consumer<LookupElementAction> consumer) {
  final StaticallyImportable item = element.as(StaticallyImportable.CLASS_CONDITION_KEY);
  if (item == null || !item.canBeImported()) {
    return;
  }

  final Icon checkIcon = PlatformIcons.CHECK_ICON;
  final Icon icon = item.willBeImported() ? checkIcon : new EmptyIcon(checkIcon.getIconWidth(), checkIcon.getIconHeight());
  consumer.consume(new LookupElementAction(icon, "Import statically") {
    @Override
    public Result performLookupAction() {
      item.setShouldBeImported(!item.willBeImported());
      return new Result.ChooseItem(element);
    }
  });
}

项目：intellij-ce-playground 文件：StackFrameDescriptorImpl.java

private Icon calcIcon() {
  try {
    if(myFrame.isObsolete()) {
      return AllIcons.Debugger.Db_obsolete;
    }
  }
  catch (EvaluateException ignored) {
  }
  return EmptyIcon.create(6);//AllIcons.Debugger.StackFrame;
}

项目：intellij-ce-playground 文件：SimpleTree.java

public Icon getEmptyHandle() {
  if (myEmptyHandle == null) {
    final Icon expand = getExpandedHandle();
    myEmptyHandle = expand != null ? EmptyIcon.create(expand) : EmptyIcon.create(0);
  }

  return myEmptyHandle;
}

项目：intellij-ce-playground 文件：PresentationModeProgressPanel.java

public PresentationModeProgressPanel(InlineProgressIndicator progress) {
  myProgress = progress;
  Font font = JBUI.Fonts.label(11);
  myText.setFont(font);
  myText2.setFont(font);
  myText.setIcon(EmptyIcon.create(1, 16));
  myText2.setIcon(EmptyIcon.create(1, 16));
  myUpdateQueue = new MergingUpdateQueue("Presentation Mode Progress", 100, true, null);
  myUpdate = new Update("Update UI") {
    @Override
    public void run() {
      updateImpl();
    }
  };
}

项目：intellij-ce-playground 文件：IconWithTextAction.java

protected IconWithTextAction(String text, String description, Icon icon) {
  super(text, description, icon);
  if (icon == null) {
    getTemplatePresentation().setIcon(EmptyIcon.ICON_0);
    getTemplatePresentation().setDisabledIcon(EmptyIcon.ICON_0);
  }
}

项目：intellij-ce-playground 文件：PopupFactoryImpl.java

public void buildGroup(@NotNull ActionGroup actionGroup) {
  calcMaxIconSize(actionGroup);
  myEmptyIcon = myMaxIconHeight != -1 && myMaxIconWidth != -1 ? new EmptyIcon(myMaxIconWidth, myMaxIconHeight) : null;

  appendActionsFromGroup(actionGroup);

  if (myListModel.isEmpty()) {
    myListModel.add(new ActionItem(Utils.EMPTY_MENU_FILLER, Utils.NOTHING_HERE, null, false, null, false, null));
  }
}

项目：intellij-ce-playground 文件：ShowUIDefaultsAction.java

@Override
public void paintIcon(Component c, Graphics g, int x, int y) {
  try {
    myIcon.paintIcon(c, g, x, y);
  } catch (Exception e) {
    EmptyIcon.ICON_0.paintIcon(c, g, x, y);
  }
}

项目：intellij-ce-playground 文件：GtkMenuItemUI.java

@Override
public void installUI(final JComponent c) {
  super.installUI(c);

  myHiddenItem = new JCheckBoxMenuItem();
  myOriginalUI.installUI(myHiddenItem);
  menuItem.setBorder(myHiddenItem.getBorder());
  final Icon icon = getCheckIconFromContext(myOriginalUI, myHiddenItem);
  checkIcon = isCheckBoxItem() ? icon : EmptyIcon.create(icon);
}

项目：intellij-ce-playground 文件：DefaultLookupItemRenderer.java

@Nullable
private static Icon _getRawIcon(LookupElement item, boolean real) {
  if (item instanceof LookupItem) {
    Icon icon = (Icon)((LookupItem)item).getAttribute(LookupItem.ICON_ATTR);
    if (icon != null) return icon;
  }

  Object o = item.getObject();

  if (!real) {
    if (item.getObject() instanceof String) {
      return EmptyIcon.ICON_0;
    }

    return new EmptyIcon(SAMPLE_ICON.getIconWidth() * 2, SAMPLE_ICON.getIconHeight());
  }

  if (o instanceof Iconable && !(o instanceof PsiElement)) {
    return ((Iconable)o).getIcon(Iconable.ICON_FLAG_VISIBILITY);
  }

  final PsiElement element = item.getPsiElement();
  if (element != null && element.isValid()) {
    return element.getIcon(Iconable.ICON_FLAG_VISIBILITY);
  }
  return null;
}

项目：intellij-ce-playground 文件：LookupActionsStep.java

public LookupActionsStep(Collection<LookupElementAction> actions, LookupImpl lookup, LookupElement lookupElement) {
  super(null, new ArrayList<LookupElementAction>(actions));
  myLookup = lookup;
  myLookupElement = lookupElement;

  int w = 0, h = 0;
  for (LookupElementAction action : actions) {
    final Icon icon = action.getIcon();
    if (icon != null) {
      w = Math.max(w, icon.getIconWidth());
      h = Math.max(h, icon.getIconHeight());
    }
  }
  myEmptyIcon = new EmptyIcon(w, h);
}

项目：intellij-ce-playground 文件：NavBarItem.java

public NavBarItem(NavBarPanel panel, Object object, int idx, Disposable parent) {
  myPanel = panel;
  myUI = panel.getNavBarUI();
  myObject = object;
  myIndex = idx;
  isPopupElement = idx == -1;

  if (object != null) {
    NavBarPresentation presentation = myPanel.getPresentation();
    myText = presentation.getPresentableText(object);
    Icon icon = presentation.getIcon(object);
    myIcon = icon != null ? icon : EmptyIcon.create(5);
    myAttributes = presentation.getTextAttributes(object, false);
  }
  else {
    myText = "Sample";
    myIcon = PlatformIcons.DIRECTORY_CLOSED_ICON;
    myAttributes = SimpleTextAttributes.REGULAR_ATTRIBUTES;
  }

  Disposer.register(parent == null ? panel : parent, this);

  setOpaque(false);
  setIpad(myUI.getElementIpad(isPopupElement));

  if (!isPopupElement) {
    setMyBorder(null);
    setBorder(null);
    setPaintFocusBorder(false);
  }

  update();
}

项目：intellij-ce-playground 文件：InvalidExcludeListItem.java

@Override
public void renderItem(ColoredListCellRenderer renderer) {
  if (myFrameworkTypeId != null) {
    renderer.append(myFrameworkTypeId, SimpleTextAttributes.ERROR_ATTRIBUTES);
    if (myFileUrl != null) {
      renderer.append(" in " + myFileUrl, SimpleTextAttributes.ERROR_ATTRIBUTES);
    }
  }
  else {
    renderer.append(myFileUrl, SimpleTextAttributes.ERROR_ATTRIBUTES);
  }
  renderer.setIcon(EmptyIcon.ICON_16);
}

项目：intellij-ce-playground 文件：MessageTreeRenderer.java

@Override
protected void initComponent(JTree tree, Object value, boolean selected, boolean expanded, boolean leaf, int row, boolean hasFocus) {
  ErrorTreeElement element = getElement(value);

  if (element != null) {
    String[] text = element.getText();
    if (text == null) {
      text = EMPTY_STRING_ARRAY;
    }
    if (text.length > 0 && text[0] == null) {
      text[0] = "";
    }
    setText(text, "");
  }

  Icon icon = null;

  if (element instanceof GroupingElement) {
    GroupingElement groupingElement = (GroupingElement)element;
    icon = groupingElement.getFile() != null ? groupingElement.getFile().getFileType().getIcon() : AllIcons.FileTypes.Java;
  }
  else if (element instanceof SimpleMessageElement || element instanceof NavigatableMessageElement) {
    ErrorTreeElementKind kind = element.getKind();
    icon = getIconFor(kind);
  }
  if (icon == null) {
    icon = EmptyIcon.ICON_16;
  }
  setIcon(icon);
}

项目：intellij-ce-playground 文件：MessageTreeRenderer.java

@NotNull
private static Icon getIconFor(@NotNull ErrorTreeElementKind kind) {
  switch (kind) {
    case ERROR:
      return AllIcons.General.BalloonError;
    case WARNING:
      return AllIcons.General.BalloonWarning;
    case INFO:
      return AllIcons.General.BalloonInformation;
    default:
      return EmptyIcon.ICON_16;
  }
}

项目：intellij-ce-playground 文件：PropertyInspectorTable.java

public MyCompositeTableCellRenderer(){
  myPropertyNameRenderer = new ColoredTableCellRenderer() {
    protected void customizeCellRenderer(
      final JTable table,
      final Object value,
      final boolean selected,
      final boolean hasFocus,
      final int row,
      final int column
    ) {
      // We will append text later in the
      setPaintFocusBorder(false);
      setFocusBorderAroundIcon(true);
    }
  };

  myErrorRenderer = new ColoredTableCellRenderer() {
    protected void customizeCellRenderer(JTable table, Object value, boolean selected, boolean hasFocus, int row, int column) {
      setPaintFocusBorder(false);
    }
  };

  myExpandIcon= UIUtil.isUnderDarcula() ? AllIcons.Mac.Tree_white_right_arrow : UIDesignerIcons.ExpandNode;
  myCollapseIcon=UIUtil.isUnderDarcula() ? AllIcons.Mac.Tree_white_down_arrow : UIDesignerIcons.CollapseNode;
  for(int i=0; i<myIndentIcons.length; i++) {
    myIndentIcons [i] = new EmptyIcon(myExpandIcon.getIconWidth() + 11 * i, myExpandIcon.getIconHeight());
  }
  myIndentedExpandIcon = new IndentedIcon(myExpandIcon, 11);
  myIndentedCollapseIcon = new IndentedIcon(myCollapseIcon, 11);
}

项目：tools-idea 文件：SimpleTree.java

public Icon getEmptyHandle() {
  if (myEmptyHandle == null) {
    final Icon expand = getExpandedHandle();
    myEmptyHandle = expand != null ? EmptyIcon.create(expand) : EmptyIcon.create(0);
  }

  return myEmptyHandle;
}

项目：tools-idea 文件：IconUtil.java

@NotNull
private static Icon createEmptyIconLike(@NotNull String baseIconPath) {
  Icon baseIcon = IconLoader.findIcon(baseIconPath);
  if (baseIcon == null) {
    return EmptyIcon.ICON_16;
  }
  return new EmptyIcon(baseIcon.getIconWidth(), baseIcon.getIconHeight());
}

项目：tools-idea 文件：EditorWindow.java

public void setEditor(@Nullable final EditorWithProviderComposite editor, final boolean focusEditor) {
  if (editor != null) {
    if (myTabbedPane == null) {
      myPanel.removeAll ();
      myPanel.add (new TCompForTablessMode(this, editor), BorderLayout.CENTER);
      myPanel.revalidate ();
      return;
    }

    final int index = findEditorIndex(editor);
    if (index != -1) {
      setSelectedEditor(editor, focusEditor);
    }
    else {
      Integer initialIndex = editor.getFile().getUserData(INITIAL_INDEX_KEY);
      int indexToInsert = 0;
      if (initialIndex == null) {
        int selectedIndex = myTabbedPane.getSelectedIndex();
        if (selectedIndex >= 0) {
          indexToInsert = UISettings.getInstance().ACTIVATE_RIGHT_EDITOR_ON_CLOSE ? selectedIndex : selectedIndex + 1; 
        }
      } else {
        indexToInsert = initialIndex;
      }

      final VirtualFile file = editor.getFile();
      final Icon template = AllIcons.FileTypes.Text;
      myTabbedPane.insertTab(file, new EmptyIcon(template.getIconWidth(), template.getIconHeight()), new TComp(this, editor), null, indexToInsert);
      trimToSize(UISettings.getInstance().EDITOR_TAB_LIMIT, file, false);
      setSelectedEditor(editor, focusEditor);
      myOwner.updateFileIcon(file);
      myOwner.updateFileColor(file);
    }
    myOwner.setCurrentWindow(this, false);
  }
  myPanel.revalidate();
}

项目：tools-idea 文件：PopupFactoryImpl.java

public void buildGroup(@NotNull ActionGroup actionGroup) {
  calcMaxIconSize(actionGroup);
  myEmptyIcon = myMaxIconHeight != -1 && myMaxIconWidth != -1 ? new EmptyIcon(myMaxIconWidth, myMaxIconHeight) : null;

  appendActionsFromGroup(actionGroup);

  if (myListModel.isEmpty()) {
    myListModel.add(new ActionItem(Utils.EMPTY_MENU_FILLER, Utils.NOTHING_HERE, false, null, false, null));
  }
}

项目：tools-idea 文件：ShowUIDefaultsAction.java

@Override
public void paintIcon(Component c, Graphics g, int x, int y) {
  try {
    myIcon.paintIcon(c, g, x, y);
  } catch (Exception e) {
    EmptyIcon.ICON_0.paintIcon(c, g, x, y);
  }
}

项目：tools-idea 文件：GtkMenuItemUI.java

@Override
public void installUI(final JComponent c) {
  super.installUI(c);

  myHiddenItem = new JCheckBoxMenuItem();
  myOriginalUI.installUI(myHiddenItem);
  menuItem.setBorder(myHiddenItem.getBorder());
  final Icon icon = getCheckIconFromContext(myOriginalUI, myHiddenItem);
  checkIcon = isCheckBoxItem() ? icon : EmptyIcon.create(icon);
}

项目：tools-idea 文件：DefaultLookupItemRenderer.java

@Nullable
private static Icon _getRawIcon(LookupElement item, boolean real) {
  if (item instanceof LookupItem) {
    Icon icon = (Icon)((LookupItem)item).getAttribute(LookupItem.ICON_ATTR);
    if (icon != null) return icon;
  }

  Object o = item.getObject();

  if (!real) {
    if (item.getObject() instanceof String) {
      return EmptyIcon.ICON_0;
    }

    return new EmptyIcon(SAMPLE_ICON.getIconWidth() * 2, SAMPLE_ICON.getIconHeight());
  }

  if (o instanceof Iconable && !(o instanceof PsiElement)) {
    return ((Iconable)o).getIcon(Iconable.ICON_FLAG_VISIBILITY);
  }

  final PsiElement element = item.getPsiElement();
  if (element != null && element.isValid()) {
    return element.getIcon(Iconable.ICON_FLAG_VISIBILITY);
  }
  return null;
}