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java.lang.Object org.eclipse.swt.widgets.Widget org.eclipse.swt.widgets.Control org.eclipse.swt.widgets.ProgressBar
public class ProgressBar
Instances of the receiver represent is an unselectable user interface object that is used to display progress, typically in the form of a bar.
Note: Only one of the styles HORIZONTAL and VERTICAL may be specified.
IMPORTANT: This class is intended to be subclassed only within the SWT implementation.
Constructor Summary | |
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ProgressBar(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 | |
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Point |
computeSize(int wHint,
int hHint,
boolean changed)
Returns the preferred size of the receiver. |
int |
getMaximum()
Returns the maximum value which the receiver will allow. |
int |
getMinimum()
Returns the minimum value which the receiver will allow. |
int |
getSelection()
Returns the single 'selection' that is the receiver's position. |
int |
getState()
Returns the state of the receiver. |
void |
setMaximum(int value)
Sets the maximum value that the receiver will allow. |
void |
setMinimum(int value)
Sets the minimum value that the receiver will allow. |
void |
setSelection(int value)
Sets the single 'selection' that is the receiver's position to the argument which must be greater than or equal to zero. |
void |
setState(int state)
Sets the state of the receiver. |
Methods inherited from class org.eclipse.swt.widgets.Widget |
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addDisposeListener, addListener, checkSubclass, checkWidget, dispose, getData, getData, getDisplay, getListeners, getStyle, isDisposed, isListening, notifyListeners, removeDisposeListener, removeListener, reskin, setData, setData, toString |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public ProgressBar(Composite parent, int style)
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.
parent
- a composite control which will be the parent of the new
instance (cannot be null)style
- the style of control to construct
java.lang.IllegalArgumentException
- SWTException
- SWT.SMOOTH
,
SWT.HORIZONTAL
,
SWT.VERTICAL
,
Widget.checkSubclass()
,
Widget.getStyle()
Method Detail |
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public Point computeSize(int wHint, int hHint, boolean changed)
Control
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.
computeSize
in class Control
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
Layout
,
Control.getBorderWidth()
,
Control.getBounds()
,
Control.getSize()
,
Control.pack(boolean)
,
"computeTrim, getClientArea for controls that implement them"public int getMaximum()
SWTException
- public int getMinimum()
SWTException
- public int getSelection()
SWTException
- public void setMaximum(int value)
value
- the new maximum, which must be greater than the current
minimum
SWTException
- public void setMinimum(int value)
value
- the new minimum, which must be nonnegative and less than the
current maximum
SWTException
- public void setSelection(int value)
value
- the new selection (must be zero or greater)
SWTException
- public void setState(int state)
state
- the new state
SWTException
- public int getState()
SWTException
-
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Copyright (c) EclipseSource and others 2002, 2013. All rights reserved. This program and the accompanying materials are made available under the terms of the Eclipse Public License v1.0