java.lang.Object
javax.swing.ProgressMonitor
- All Implemented Interfaces:
Accessible
A class to monitor the progress of some operation. If it looks
like the operation will take a while, a progress dialog will be popped up.
When the ProgressMonitor is created it is given a numeric range and a
descriptive string. As the operation progresses, call the setProgress method
to indicate how far along the [min,max] range the operation is.
Initially, there is no ProgressDialog. After the first millisToDecideToPopup
milliseconds (default 500) the progress monitor will predict how long
the operation will take. If it is longer than millisToPopup (default 2000,
2 seconds) a ProgressDialog will be popped up.
From time to time, when the Dialog box is visible, the progress bar will be updated when setProgress is called. setProgress won't always update the progress bar, it will only be done if the amount of progress is visibly significant.
For further documentation and examples see How to Monitor Progress, a section in The Java Tutorial.
- Since:
- 1.2
- See Also:
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Nested Class Summary
Nested ClassesModifier and TypeClassDescriptionprotected classAccessibleProgressMonitorimplements accessibility support for theProgressMonitorclass. -
Field Summary
FieldsModifier and TypeFieldDescriptionprotected AccessibleContextTheAccessibleContextfor theProgressMonitor -
Constructor Summary
ConstructorsConstructorDescriptionProgressMonitor(Component parentComponent, Object message, String note, int min, int max) Constructs a graphic object that shows progress, typically by filling in a rectangular bar as the process nears completion. -
Method Summary
Modifier and TypeMethodDescriptionvoidclose()Indicate that the operation is complete.Gets theAccessibleContextfor theProgressMonitorintReturns the maximum value -- the higher end of the progress value.intReturns the amount of time this object waits before deciding whether or not to popup a progress monitor.intReturns the amount of time it will take for the popup to appear.intReturns the minimum value -- the lower end of the progress value.getNote()Specifies the additional note that is displayed along with the progress message.booleanReturns true if the user hits the Cancel button or closes the progress dialog.voidsetMaximum(int m) Specifies the maximum value.voidsetMillisToDecideToPopup(int millisToDecideToPopup) Specifies the amount of time to wait before deciding whether or not to popup a progress monitor.voidsetMillisToPopup(int millisToPopup) Specifies the amount of time it will take for the popup to appear.voidsetMinimum(int m) Specifies the minimum value.voidSpecifies the additional note that is displayed along with the progress message.voidsetProgress(int nv) Indicate the progress of the operation being monitored.
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Field Details
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accessibleContext
TheAccessibleContextfor theProgressMonitor- Since:
- 1.5
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Constructor Details
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ProgressMonitor
Constructs a graphic object that shows progress, typically by filling in a rectangular bar as the process nears completion.- Parameters:
parentComponent- the parent component for the dialog boxmessage- a descriptive message that will be shown to the user to indicate what operation is being monitored. This does not change as the operation progresses. See the message parameters to methods inJOptionPane.messagefor the range of values.note- a short note describing the state of the operation. As the operation progresses, you can call setNote to change the note displayed. This is used, for example, in operations that iterate through a list of files to show the name of the file being processes. If note is initially null, there will be no note line in the dialog box and setNote will be ineffectivemin- the lower bound of the rangemax- the upper bound of the range- See Also:
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Method Details
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setProgress
public void setProgress(int nv) Indicate the progress of the operation being monitored. If the specified value is >= the maximum, the progress monitor is closed.- Parameters:
nv- an int specifying the current value, between the maximum and minimum specified for this component- See Also:
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close
public void close()Indicate that the operation is complete. This happens automatically when the value set by setProgress is >= max, but it may be called earlier if the operation ends early. -
getMinimum
public int getMinimum()Returns the minimum value -- the lower end of the progress value.- Returns:
- an int representing the minimum value
- See Also:
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setMinimum
public void setMinimum(int m) Specifies the minimum value.- Parameters:
m- an int specifying the minimum value- See Also:
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getMaximum
public int getMaximum()Returns the maximum value -- the higher end of the progress value.- Returns:
- an int representing the maximum value
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setMaximum
public void setMaximum(int m) Specifies the maximum value.- Parameters:
m- an int specifying the maximum value- See Also:
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isCanceled
public boolean isCanceled()Returns true if the user hits the Cancel button or closes the progress dialog.- Returns:
- true if the user hits the Cancel button or closes the progress dialog
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setMillisToDecideToPopup
public void setMillisToDecideToPopup(int millisToDecideToPopup) Specifies the amount of time to wait before deciding whether or not to popup a progress monitor.- Parameters:
millisToDecideToPopup- an int specifying the time to wait, in milliseconds- See Also:
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getMillisToDecideToPopup
public int getMillisToDecideToPopup()Returns the amount of time this object waits before deciding whether or not to popup a progress monitor.- Returns:
- the amount of time in milliseconds this object waits before deciding whether or not to popup a progress monitor
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setMillisToPopup
public void setMillisToPopup(int millisToPopup) Specifies the amount of time it will take for the popup to appear. (If the predicted time remaining is less than this time, the popup won't be displayed.)- Parameters:
millisToPopup- an int specifying the time in milliseconds- See Also:
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getMillisToPopup
public int getMillisToPopup()Returns the amount of time it will take for the popup to appear.- Returns:
- the amont of time in milliseconds it will take for the popup to appear
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setNote
Specifies the additional note that is displayed along with the progress message. Used, for example, to show which file the is currently being copied during a multiple-file copy.- Parameters:
note- a String specifying the note to display- See Also:
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getNote
Specifies the additional note that is displayed along with the progress message.- Returns:
- a String specifying the note to display
- See Also:
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getAccessibleContext
Gets theAccessibleContextfor theProgressMonitor- Specified by:
getAccessibleContextin interfaceAccessible- Returns:
- the
AccessibleContextfor theProgressMonitor - Since:
- 1.5
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