MetalTreeUI (Java Platform SE 8 )

java.lang.Object
- javax.swing.plaf.ComponentUI
- - javax.swing.plaf.TreeUI
  - - javax.swing.plaf.basic.BasicTreeUI
    - - javax.swing.plaf.metal.MetalTreeUI

```
public class MetalTreeUI
extends BasicTreeUI
```
金属外观实现TreeUI 。
MetalTreeUI允许配置如何可视化地渲染节点之间的间距和描画。支持以下提示：

Angled
A line is drawn connecting the child to the parent. For handling of the root node refer to JTree.setRootVisible(boolean) and JTree.setShowsRootHandles(boolean).
Horizontal
A horizontal line is drawn dividing the children of the root node.
None
Do not draw any visual indication between nodes.

由于它一般是不切实际获得TreeUI从JTree并浇铸成的实例MetalTreeUI启用通过客户端属性这个属性JTree.lineStyle 。例如，要切换到Horizontal样式，您可以执行以下操作： tree.putClientProperty("JTree.lineStyle", "Horizontal");

默认值为Angled 。

Nested Class Summary
- Nested classes/interfaces inherited from class javax.swing.plaf.basic.BasicTreeUI
  BasicTreeUI.CellEditorHandler, BasicTreeUI.ComponentHandler, BasicTreeUI.FocusHandler, BasicTreeUI.KeyHandler, BasicTreeUI.MouseHandler, BasicTreeUI.MouseInputHandler, BasicTreeUI.NodeDimensionsHandler, BasicTreeUI.PropertyChangeHandler, BasicTreeUI.SelectionModelPropertyChangeHandler, BasicTreeUI.TreeCancelEditingAction, BasicTreeUI.TreeExpansionHandler, BasicTreeUI.TreeHomeAction, BasicTreeUI.TreeIncrementAction, BasicTreeUI.TreeModelHandler, BasicTreeUI.TreePageAction, BasicTreeUI.TreeSelectionHandler, BasicTreeUI.TreeToggleAction, BasicTreeUI.TreeTraverseAction

Field Summary
- Fields inherited from class javax.swing.plaf.basic.BasicTreeUI
  cellEditor, collapsedIcon, createdCellEditor, createdRenderer, currentCellRenderer, depthOffset, drawingCache, editingComponent, editingPath, editingRow, editorHasDifferentSize, expandedIcon, largeModel, lastSelectedRow, leftChildIndent, nodeDimensions, preferredMinSize, preferredSize, rendererPane, rightChildIndent, stopEditingInCompleteEditing, totalChildIndent, tree, treeModel, treeSelectionModel, treeState, validCachedPreferredSize

构造方法摘要

构造方法
Constructor and Description
`MetalTreeUI()`

方法摘要

所有方法静态方法接口方法具体的方法
Modifier and Type	Method and Description
`static ComponentUI`	`createUI(JComponent x)`
`protected void`	`decodeLineStyle(Object lineStyleFlag)` 此函数在传递给客户端属性的字符串和内部表示（当前和int）之间进行转换，
`protected int`	`getHorizontalLegBuffer()` 默认情况下，节点之间的腿的水平元素从子节点左侧的右侧开始。
`void`	`installUI(JComponent c)` 适当地配置指定的组件的外观和感觉。
`protected boolean`	`isLocationInExpandControl(int row, int rowLevel, int mouseX, int mouseY)`
`void`	`paint(Graphics g, JComponent c)` 适当地涂抹指定的组件的外观和感觉。
`protected void`	`paintHorizontalPartOfLeg(Graphics g, Rectangle clipBounds, Insets insets, Rectangle bounds, TreePath path, int row, boolean isExpanded, boolean hasBeenExpanded, boolean isLeaf)` 涂抹腿部的水平部分。
`protected void`	`paintHorizontalSeparators(Graphics g, JComponent c)`
`protected void`	`paintVerticalPartOfLeg(Graphics g, Rectangle clipBounds, Insets insets, TreePath path)` 涂上腿部的垂直部分。
`void`	`uninstallUI(JComponent c)` 在installUI中反转在 `installUI`上完成的 `installUI` 。

Methods inherited from class javax.swing.plaf.basic.BasicTreeUI
cancelEditing, checkForClickInExpandControl, completeEditing, completeEditing, completeUIInstall, completeUIUninstall, configureLayoutCache, createCellEditorListener, createCellRendererPane, createComponentListener, createDefaultCellEditor, createDefaultCellRenderer, createFocusListener, createKeyListener, createLayoutCache, createMouseListener, createNodeDimensions, createPropertyChangeListener, createSelectionModelPropertyChangeListener, createTreeExpansionListener, createTreeModelListener, createTreeSelectionListener, drawCentered, drawDashedHorizontalLine, drawDashedVerticalLine, ensureRowsAreVisible, getBaseline, getBaselineResizeBehavior, getCellEditor, getCellRenderer, getClosestPathForLocation, getCollapsedIcon, getDropLineRect, getEditingPath, getExpandedIcon, getHashColor, getLastChildPath, getLeadSelectionRow, getLeftChildIndent, getMaximumSize, getMinimumSize, getModel, getPathBounds, getPathForRow, getPreferredMinSize, getPreferredSize, getPreferredSize, getRightChildIndent, getRowCount, getRowForPath, getRowHeight, getRowX, getSelectionModel, getShowsRootHandles, getVerticalLegBuffer, handleExpandControlClick, installComponents, installDefaults, installKeyboardActions, installListeners, isDropLine, isEditable, isEditing, isLargeModel, isLeaf, isLocationInExpandControl, isMultiSelectEvent, isRootVisible, isToggleEvent, isToggleSelectionEvent, paintDropLine, paintExpandControl, paintHorizontalLine, paintRow, paintVerticalLine, pathWasCollapsed, pathWasExpanded, prepareForUIInstall, prepareForUIUninstall, selectPathForEvent, setCellEditor, setCellRenderer, setCollapsedIcon, setEditable, setExpandedIcon, setHashColor, setLargeModel, setLeftChildIndent, setModel, setPreferredMinSize, setRightChildIndent, setRootVisible, setRowHeight, setSelectionModel, setShowsRootHandles, shouldPaintExpandControl, startEditing, startEditingAtPath, stopEditing, toggleExpandState, uninstallComponents, uninstallDefaults, uninstallKeyboardActions, uninstallListeners, updateCachedPreferredSize, updateCellEditor, updateDepthOffset, updateExpandedDescendants, updateLayoutCacheExpandedNodes, updateLeadSelectionRow, updateRenderer, updateSize

Methods inherited from class javax.swing.plaf.ComponentUI
contains, getAccessibleChild, getAccessibleChildrenCount, update

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 构造方法详细信息
  - MetalTreeUI
```
public MetalTreeUI()
```
- 方法详细信息
  - createUI
```
public static ComponentUI createUI(JComponent x)
```
  - getHorizontalLegBuffer
```
protected int getHorizontalLegBuffer()
```
    描述从类别复制： BasicTreeUI
    
    默认情况下，节点之间的腿的水平元素从子节点左侧的右侧开始。这种方法使腿之前结束。
    
    重写：
    
    getHorizontalLegBuffer在 BasicTreeUI
  - installUI
```
public void installUI(JComponent c)
```
    描述从类别复制： ComponentUI
    适当地配置指定的组件的外观和感觉。当正在安装ComponentUI实例作为指定组件上的UI委托时，将调用此方法。该方法应该完全配置组件的外观，包括以下内容：
    1. 为组件上的颜色，字体，边框，图标，不透明度等安装默认属性值。只要有可能，由客户端程序初始化的属性值不应该被重写。
    2. 如有必要，请在LayoutManager上安装LayoutManager。
    3. 创建/添加任何所需的子组件到组件。
    4. 在组件上创建/安装事件侦听器。
    5. 在PropertyChangeListener上创建/安装PropertyChangeListener，以便适当地检测和响应组件属性更改。
    6. 在组件上安装键盘UI（助记符，遍历等）。
    7. 初始化任何适当的实例数据。
    重写：
    
    installUI在类 BasicTreeUI
    
    参数
    
    c - 正在安装此UI代理的组件
    
    另请参见：
    
    ComponentUI.uninstallUI(javax.swing.JComponent) ， JComponent.setUI(javax.swing.plaf.ComponentUI) ， JComponent.updateUI()
  - uninstallUI
```
public void uninstallUI(JComponent c)
```
    描述从类别复制： ComponentUI
    在installUI中反转在installUI上完成的installUI 。当这个UIComponent实例作为指定组件的UI委托被删除时，将调用此方法。该方法应该撤消在installUI中执行的installUI ，小心使JComponent实例处于干净状态（无外部监听器，外观特定属性对象等）。这应该包括以下内容：
    1. 从组件中删除任何UI集边框。
    2. 删除组件上的任何UI集布局管理器。
    3. 从组件中删除任何添加了UI的子组件。
    4. 从组件中删除任何UI添加的事件/属性侦听器。
    5. 从组件中删除任何UI安装的键盘UI。
    6. 对任何分配的实例数据对象进行空白以允许GC。
    重写：
    
    uninstallUI在 BasicTreeUI
    
    参数
    
    c - 删除此UI代理的组件; 这个参数经常被忽略，但如果UI对象是无状态的并且被多个组件共享，则可能会被使用
    
    另请参见：
    
    ComponentUI.installUI(javax.swing.JComponent) ， JComponent.updateUI()
  - decodeLineStyle
```
protected void decodeLineStyle(Object lineStyleFlag)
```
    此函数在传递给客户端属性的字符串和内部表示（当前和int）之间进行转换，
  - isLocationInExpandControl
```
protected boolean isLocationInExpandControl(int row,
                                            int rowLevel,
                                            int mouseX,
                                            int mouseY)
```
  - paint
```
public void paint(Graphics g,
                  JComponent c)
```
    描述从类别复制： ComponentUI
    
    适当地涂抹指定的组件的外观和感觉。当指定的组件被绘制时，该方法将从ComponentUI.update方法调用。子类应该覆盖此方法，并使用指定的Graphics对象来呈现Graphics的内容。
    
    重写：
    
    paint在 BasicTreeUI
    
    参数
    
    g - 要绘画的 Graphics上下文
    
    c - 正在涂漆的部件这个参数经常被忽略，但如果UI对象是无状态的并且被多个组件共享，则可能会被使用
    
    另请参见：
    
    ComponentUI.update(java.awt.Graphics, javax.swing.JComponent)
  - paintHorizontalSeparators
```
protected void paintHorizontalSeparators(Graphics g,
                                         JComponent c)
```
  - paintVerticalPartOfLeg
```
protected void paintVerticalPartOfLeg(Graphics g,
                                      Rectangle clipBounds,
                                      Insets insets,
                                      TreePath path)
```
    描述从类别复制： BasicTreeUI
    
    涂上腿部的垂直部分。该接收器不应修改clipBounds ， insets 。
    
    重写：
    
    paintVerticalPartOfLeg在 BasicTreeUI
  - paintHorizontalPartOfLeg
```
protected void paintHorizontalPartOfLeg(Graphics g,
                                        Rectangle clipBounds,
                                        Insets insets,
                                        Rectangle bounds,
                                        TreePath path,
                                        int row,
                                        boolean isExpanded,
                                        boolean hasBeenExpanded,
                                        boolean isLeaf)
```
    描述从类别复制： BasicTreeUI
    
    涂抹腿部的水平部分。接收方不应修改clipBounds或insets 。
    注意：如果根目录不可见， parentRow可以为-1。
    
    重写：
    
    paintHorizontalPartOfLeg在 BasicTreeUI

Class MetalTreeUI

Nested Class Summary

Nested classes/interfaces inherited from class javax.swing.plaf.basic.BasicTreeUI

Field Summary

Fields inherited from class javax.swing.plaf.basic.BasicTreeUI

构造方法摘要

方法摘要

Methods inherited from class javax.swing.plaf.basic.BasicTreeUI

Methods inherited from class javax.swing.plaf.ComponentUI

Methods inherited from class java.lang.Object

构造方法详细信息

MetalTreeUI

方法详细信息

createUI

getHorizontalLegBuffer

installUI

uninstallUI

decodeLineStyle

isLocationInExpandControl

paint

paintHorizontalSeparators

paintVerticalPartOfLeg

paintHorizontalPartOfLeg