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org.eclipse.jface.layout
Class AbstractColumnLayout
java.lang.Object
org.eclipse.swt.widgets.Layout
org.eclipse.jface.layout.AbstractColumnLayout
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Direct Known Subclasses:
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TableColumnLayout,
TreeColumnLayout
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public abstract class AbstractColumnLayout
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Layout
The AbstractColumnLayout is a
Layout used to set the size of a table
in a consistent way even during a resize unlike a
TableLayout which
only sets initial sizes.
You can only add the layout to a container whose only child is the
table/tree control you want the layouts applied to.
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Since:
- 3.4
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Field Summary
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protected static
String
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LAYOUT_DATA
Key used to restore the layout data in the columns data-slot |
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Methods inherited from class java.lang.
Object
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clone,
equals,
finalize,
getClass,
hashCode,
notify,
notifyAll,
toString,
wait,
wait,
wait
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LAYOUT_DATA
protected static final
String LAYOUT_DATA
- Key used to restore the layout data in the columns data-slot
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Since:
- 3.5
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See Also:
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Constant Field Values
AbstractColumnLayout
public AbstractColumnLayout()
setColumnData
public void setColumnData(
Widget column,
ColumnLayoutData data)
- Adds a new column of data to this table layout.
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Parameters:
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column - the column -
data - the column layout data
computeSize
protected
Point computeSize(
Composite composite,
int wHint,
int hHint,
boolean flushCache)
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Description copied from class:
Layout
- Computes and returns the size of the specified
composite's client area according to this layout.
This method computes the size that the client area
of the composite must be in order to position all
children at their preferred size inside the
composite according to the layout algorithm
encoded by this layout.
When a width or height hint is supplied, it is
used to constrain the result. For example, if a
width hint is provided that is less than the
width of the client area, the layout may choose
to wrap and increase height, clip, overlap, or
otherwise constrain the children.
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Specified by:
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computeSize
in class
Layout
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Parameters:
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composite - a composite widget using this layout -
wHint - width (SWT.DEFAULT for preferred size) -
hHint - height (SWT.DEFAULT for preferred size) -
flushCache - true means flush cached layout values
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Returns:
- a point containing the computed size (width, height)
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See Also:
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Layout.layout(org.eclipse.swt.widgets.Composite, boolean),
Control.getBorderWidth(),
Control.getBounds(),
Control.getSize(),
Control.pack(boolean),
"computeTrim, getClientArea for controls that implement them"
layout
protected void layout(
Composite composite,
boolean flushCache)
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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.
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Specified by:
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layout
in class
Layout
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Parameters:
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composite - a composite widget using this layout -
flushCache - true means flush cached layout values
getColumnCount
protected abstract int getColumnCount(
Scrollable tableTree)
- Get the number of columns for the receiver.
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Parameters:
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tableTree - the control
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Returns:
- the number of columns
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Since:
- 3.5
setColumnWidths
protected abstract void setColumnWidths(
Scrollable tableTree,
int[] widths)
- Set the widths of the columns.
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Parameters:
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tableTree - the control -
widths - the widths of the column -
Since:
- 3.5
getLayoutData
protected abstract
ColumnLayoutData getLayoutData(
Scrollable tableTree,
int columnIndex)
- Get the layout data for a column
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Parameters:
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tableTree - the control -
columnIndex - the column index
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Returns:
- the layout data, might not null
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Since:
- 3.5
updateColumnData
protected abstract void updateColumnData(
Widget column)
- Update the layout data for a column
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Parameters:
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column - the column -
Since:
- 3.5
getColumnTrim
protected int getColumnTrim()
- The number of extra pixels taken as horizontal trim by the table column.
To ensure there are N pixels available for the content of the column,
assign N+COLUMN_TRIM for the column width.
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Returns:
- the trim used by the columns
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Since:
- 3.4
Guidelines for using Eclipse APIs.
Copyright (c) Eclipse contributors and others 2000, 2008. All rights reserved.
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