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Eclipse Platform
Release 3.5

org.eclipse.jface.layout
Class TreeColumnLayout

java.lang.Object
  extended by 

org.eclipse.swt.widgets.Layout
      extended by 

org.eclipse.jface.layout.AbstractColumnLayout
          extended by 
org.eclipse.jface.layout.TreeColumnLayout

public class TreeColumnLayout
extends AbstractColumnLayout

The TreeColumnLayout is the Layout used to maintain TreeColumn sizes in a Tree.

You can only add the Layout to a container whose only child is the Tree control you want the Layout applied to. Don't assign the layout directly the Tree

Since:
3.3

Field Summary
 
Fields inherited from class org.eclipse.jface.layout. AbstractColumnLayout
LAYOUT_DATA
 
Constructor Summary
TreeColumnLayout ()
           
 
Method Summary
protected  int getColumnCount ( Scrollable tree)
          Get the number of columns for the receiver.
protected   ColumnLayoutData getLayoutData ( Scrollable tableTree, int columnIndex)
          Get the layout data for a column
protected  void layout ( Composite composite, boolean flushCache)
          Lays out the children of the specified composite according to this layout.
protected  void setColumnWidths ( Scrollable tree, int[] widths)
          Set the widths of the columns.
protected  void updateColumnData ( Widget column)
          Update the layout data for a column
 
Methods inherited from class org.eclipse.jface.layout. AbstractColumnLayout
computeSize, getColumnTrim, setColumnData
 
Methods inherited from class org.eclipse.swt.widgets. Layout
flushCache
 
Methods inherited from class java.lang. Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

TreeColumnLayout

public TreeColumnLayout()
Method Detail

layout

protected void layout(
Composite composite,
                      boolean flushCache)
Description copied from class: Layout
Lays out the children of the specified composite according to this layout.

This method positions and sizes the children of a composite using the layout algorithm encoded by this layout. Children of the composite are positioned in the client area of the composite. The position of the composite is not altered by this method.

When the flush cache hint is true, the layout is instructed to flush any cached values associated with the children. Typically, a layout will cache the preferred sizes of the children to avoid the expense of computing these values each time the widget is laid out.

When layout is triggered explicitly by the programmer the flush cache hint is true. When layout is triggered by a resize, either caused by the programmer or by the user, the hint is false.

Overrides:
layout in class AbstractColumnLayout
Parameters:
composite - a composite widget using this layout
flushCache - true means flush cached layout values

getColumnCount

protected int getColumnCount(
Scrollable tree)
Get the number of columns for the receiver.

Specified by:
getColumnCount in class AbstractColumnLayout
Parameters:
tree - the control
Returns:
the number of columns
Since:
3.5

setColumnWidths

protected void setColumnWidths(
Scrollable tree,
                               int[] widths)
Set the widths of the columns.

Specified by:
setColumnWidths in class AbstractColumnLayout
Parameters:
tree - the control
widths - the widths of the column
Since:
3.5

getLayoutData

protected 
ColumnLayoutData getLayoutData(
Scrollable tableTree,
                                         int columnIndex)
Get the layout data for a column

Specified by:
getLayoutData in class AbstractColumnLayout
Parameters:
tableTree - the control
columnIndex - the column index
Returns:
the layout data, might not null
Since:
3.5

updateColumnData

protected void updateColumnData(
Widget column)
Update the layout data for a column

Specified by:
updateColumnData in class AbstractColumnLayout
Parameters:
column - the column
Since:
3.5

Eclipse Platform
Release 3.5

Guidelines for using Eclipse APIs.

Copyright (c) Eclipse contributors and others 2000, 2008. All rights reserved.


 
 
  Published under the terms of the Eclipse Public License Version 1.0 ("EPL") Design by Interspire