org.eclipse.swt.custom
Class SashForm

java.lang.Object
  |
  +--org.eclipse.swt.widgets.Widget
        |
        +--org.eclipse.swt.widgets.Control
              |
              +--org.eclipse.swt.widgets.Scrollable
                    |
                    +--org.eclipse.swt.widgets.Composite
                          |
                          +--org.eclipse.swt.custom.SashForm

All Implemented Interfaces:

Drawable

public class SashForm

extends Composite

The SashForm lays out its children in a Row or Column arrangement (as specified by the orientation) and places a Sash between the children. One child may be maximized to occupy the entire size of the SashForm. The relative sizes of the children may be specfied using weights.

Styles:

HORIZONTAL, VERTICAL

Field Summary

int	SASH_WIDTH

Fields inherited from class org.eclipse.swt.widgets.Control

handle

Constructor Summary

SashForm(Composite parent, int style)
Constructs a new instance of this class given its parent and a style value describing its behavior and appearance.

Method Summary

Point	computeSize(int wHint, int hHint, boolean changed) Returns the preferred size of the receiver.
Control	getMaximizedControl() Answer the control that currently is maximized in the SashForm.
int	getOrientation() Returns SWT.HORIZONTAL if the controls in the SashForm are laid out side by side or SWT.VERTICAL if the controls in the SashForm are laid out top to bottom.
int[]	getWeights() Answer the relative weight of each child in the SashForm.
void	layout(boolean changed) If the receiver has a layout, asks the layout to lay out (that is, set the size and location of) the receiver's children.
void	setLayout(Layout layout) Sets the layout which is associated with the receiver to be the argument which may be null.
void	setMaximizedControl(Control control) Specify the control that should take up the entire client area of the SashForm.
void	setOrientation(int orientation) If orientation is SWT.HORIZONTAL, lay the controls in the SashForm out side by side.
void	setWeights(int[] weights) Specify the relative weight of each child in the SashForm.

Methods inherited from class org.eclipse.swt.widgets.Composite

checkSubclass, getChildren, getLayout, getTabList, layout, setFocus, setTabList

Methods inherited from class org.eclipse.swt.widgets.Scrollable

computeTrim, getClientArea, getHorizontalBar, getVerticalBar

Methods inherited from class org.eclipse.swt.widgets.Control

addControlListener, addFocusListener, addHelpListener, addKeyListener, addMouseListener, addMouseMoveListener, addMouseTrackListener, addPaintListener, addTraverseListener, computeSize, forceFocus, getAccessible, getBackground, getBorderWidth, getBounds, getDisplay, getEnabled, getFont, getForeground, getLayoutData, getLocation, getMenu, getParent, getShell, getSize, getToolTipText, getVisible, internal_dispose_GC, internal_new_GC, isDisposed, isEnabled, isFocusControl, isReparentable, isVisible, moveAbove, moveBelow, pack, pack, redraw, redraw, removeControlListener, removeFocusListener, removeHelpListener, removeKeyListener, removeMouseListener, removeMouseMoveListener, removeMouseTrackListener, removePaintListener, removeTraverseListener, setBackground, setBounds, setBounds, setCapture, setCursor, setEnabled, setFont, setForeground, setLayoutData, setLocation, setLocation, setMenu, setParent, setRedraw, setSize, setSize, setToolTipText, setVisible, toControl, toDisplay, traverse, update

Methods inherited from class org.eclipse.swt.widgets.Widget

addDisposeListener, addListener, checkWidget, dispose, getData, getData, getStyle, isListening, notifyListeners, removeDisposeListener, removeListener, removeListener, setData, setData, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

SASH_WIDTH

public int SASH_WIDTH

Constructor Detail

SashForm

public SashForm(Composite parent,
                int style)

Constructs a new instance of this class given its parent and a style value describing its behavior and appearance.

The style value is either one of the style constants defined in class SWT which is applicable to instances of this class, or must be built by bitwise OR'ing together (that is, using the int "|" operator) two or more of those SWT style constants. The class description lists the style constants that are applicable to the class. Style bits are also inherited from superclasses.

Parameters:

parent - a widget which will be the parent of the new instance (cannot be null)

style - the style of widget to construct

Throws:

IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the parent is null

SWTException -

• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent

See Also:

SWT.HORIZONTAL, SWT.VERTICAL, Widget.getStyle()

Method Detail

computeSize

public Point computeSize(int wHint,
                         int hHint,
                         boolean changed)

Description copied from class: Control

Returns the preferred size of the receiver.

The preferred size of a control is the size that it would best be displayed at. The width hint and height hint arguments allow the caller to ask a control questions such as "Given a particular width, how high does the control need to be to show all of the contents?" To indicate that the caller does not wish to constrain a particular dimension, the constant SWT.DEFAULT is passed for the hint.

If the changed flag is true, it indicates that the receiver's contents have changed, therefore any caches that a layout manager containing the control may have been keeping need to be flushed. When the control is resized, the changed flag will be false, so layout manager caches can be retained.

Overrides:

computeSize in class Composite

Parameters:

wHint - the width hint (can be SWT.DEFAULT)

hHint - the height hint (can be SWT.DEFAULT)

changed - true if the control's contents have changed, and false otherwise

Returns:

the preferred size of the control.

See Also:

Layout, Control.getBorderWidth(), Control.getBounds(), Control.getSize(), Control.pack(), "computeTrim, getClientArea for controls that implement them"

getOrientation

public int getOrientation()

Returns SWT.HORIZONTAL if the controls in the SashForm are laid out side by side or SWT.VERTICAL if the controls in the SashForm are laid out top to bottom.

Returns:

SWT.HORIZONTAL or SWT.VERTICAL

getMaximizedControl

public Control getMaximizedControl()

Answer the control that currently is maximized in the SashForm. This value may be null.

Returns:

the control that currently is maximized or null

getWeights

public int[] getWeights()

Answer the relative weight of each child in the SashForm. The weight represents the percent of the total width (if SashForm has Horizontal orientation) or total height (if SashForm has Vertical orientation) each control occupies. The weights are returned in order of the creation of the widgets (weight[0] corresponds to the weight of the first child created).

Returns:

the relative weight of each child

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

layout

public void layout(boolean changed)

Description copied from class: Composite

If the receiver has a layout, asks the layout to lay out (that is, set the size and location of) the receiver's children. If the the argument is true the layout must not rely on any cached information it is keeping about the children. If it is false the layout may (potentially) simplify the work it is doing by assuming that the state of the none of the receiver's children has changed since the last layout. If the receiver does not have a layout, do nothing.

Overrides:

layout in class Composite

Parameters:

changed - true if the layout must flush its caches, and false otherwise

setOrientation

public void setOrientation(int orientation)

If orientation is SWT.HORIZONTAL, lay the controls in the SashForm out side by side. If orientation is SWT.VERTICAL, lay the controls in the SashForm out top to bottom.

Parameters:

orientation - SWT.HORIZONTAL or SWT.VERTICAL

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
• ERROR_INVALID_ARGUMENT - if the value of orientation is not SWT.HORIZONTAL or SWT.VERTICAL

setLayout

public void setLayout(Layout layout)

Description copied from class: Composite

Sets the layout which is associated with the receiver to be the argument which may be null.

Overrides:

setLayout in class Composite

Parameters:

layout - the receiver's new layout or null

setMaximizedControl

public void setMaximizedControl(Control control)

Specify the control that should take up the entire client area of the SashForm. If one control has been maximized, and this method is called with a different control, the previous control will be minimized and the new control will be maximized.. if the value of control is null, the SashForm will minimize all controls and return to the default layout where all controls are laid out separated by sashes.

Parameters:

control - the control to be maximized or null

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

setWeights

public void setWeights(int[] weights)

Specify the relative weight of each child in the SashForm. This will determine what percent of the total width (if SashForm has Horizontal orientation) or total height (if SashForm has Vertical orientation) each control will occupy. The weights must be positive values and there must be an entry for each non-sash child of the SashForm.

Parameters:

weights - the relative weight of each child

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the receiver has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
• ERROR_INVALID_ARGUMENT - if the weights value is null or of incorrect length (must match the number of children)