Class FlatTabbedPaneUI.FlatTabbedPaneLayout

java.lang.Object
javax.swing.plaf.basic.BasicTabbedPaneUI.TabbedPaneLayout
com.formdev.flatlaf.ui.FlatTabbedPaneUI.FlatTabbedPaneLayout
All Implemented Interfaces:
LayoutManager
Direct Known Subclasses:
FlatTabbedPaneUI.FlatTabbedPaneScrollLayout
Enclosing class:
FlatTabbedPaneUI
protected class FlatTabbedPaneUI.FlatTabbedPaneLayout extends BasicTabbedPaneUI.TabbedPaneLayout
Layout manager for wrap tab layout policy (and base class for scroll tab layout policy).

Component hierarchy for wrap tab layout policy: 

JTabbedPane
   +- 1...n tab content components
   +- (optional) BasicTabbedPaneUI.TabContainer (extends JPanel)
   |  +- 1..n tab components (shown in tab area)
   +- (optional) ContainerUIResource (extends JPanel)
   |  +- leading component
   +- (optional) ContainerUIResource (extends JPanel)
      +- trailing component

Instead of using super.layoutContainer(Container) and fixing some component bounds, this class implements layoutContainer(Container) and moves/resizes components only once. This avoids that some components are moved/resized twice, which would unnecessary repaint and relayout tabbed pane. In some special case this resulted in "endless" layouting and repainting when using nested tabbed panes (top and bottom tab placement) and RSyntaxTextArea (with enabled line-wrapping) as tab content.

  • Constructor Details

    • FlatTabbedPaneLayout

      protected FlatTabbedPaneLayout()

  • Method Details

    • calculateSize

      protected Dimension calculateSize(boolean minimum)
      Overrides:
      calculateSize in class BasicTabbedPaneUI.TabbedPaneLayout

    • isContentEmpty

      protected boolean isContentEmpty()
      Check whether all content components are either null or have zero preferred size.

      If true, assume that the tabbed pane is used without any content and use the size of the tab area (single run) as minimum/preferred size.

    • calculateTabAreaSize

      protected Dimension calculateTabAreaSize()
      Calculate preferred size of the tab area. Used only if isContentEmpty() returns true.

    • layoutContainer

      public void layoutContainer(Container parent)
      Specified by:
      layoutContainer in interface LayoutManager
      Overrides:
      layoutContainer in class BasicTabbedPaneUI.TabbedPaneLayout

    • layoutContainerImpl

      protected void layoutContainerImpl()
      Since:
      3.3

    • layoutChildComponents

      protected void layoutChildComponents()
      Since:
      3.3

    • layoutChildComponent

      protected void layoutChildComponent(Component c, Rectangle contentAreaBounds)
      Since:
      3.3

    • isTabContainer

      boolean isTabContainer(Component c)

    • layoutTabContainer

      private void layoutTabContainer(Component tabContainer)
      Layouts container used for custom components in tabs.

    • layoutTabComponents

      void layoutTabComponents(Component tabContainer)
      Layouts custom components in tabs.

    • getContentAreaLayoutBounds

      Rectangle getContentAreaLayoutBounds(int tabPlacement, Insets tabAreaInsets)
      Returns bounds for content components.

    • getTabAreaLayoutBounds

      Rectangle getTabAreaLayoutBounds(int tabPlacement, Insets tabAreaInsets)
      Returns bounds for leading/trailing components and tab area. Note: Returns bounds for first tabs row only. For multi-rows tabs in wrap mode, the returned bounds does not include full tab area.

    • layoutLeftAndRightComponents

      Rectangle layoutLeftAndRightComponents(Rectangle tr, int tabAreaAlignment, Insets tabAreaInsets, boolean useTabAreaAlignment, boolean shiftTabs, boolean leftToRight)

    • layoutTopAndBottomComponents

      Rectangle layoutTopAndBottomComponents(Rectangle tr, int tabAreaAlignment, Insets tabAreaInsets, boolean useTabAreaAlignment, boolean shiftTabs)