Package org.eclipse.gef.ui.properties
Class SetPropertyValueCommand
- java.lang.Object
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- org.eclipse.gef.commands.Command
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- org.eclipse.gef.ui.properties.SetPropertyValueCommand
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public class SetPropertyValueCommand extends Command
A command used to set or reset the value of a property.- Since:
- 3.7
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Field Summary
Fields Modifier and Type Field Description protected static java.lang.Object
DEFAULT_VALUE
Value constant to indicate that the property is to be reset to its default value during execute/redo and undo.
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Constructor Summary
Constructors Constructor Description SetPropertyValueCommand(java.lang.String propertyLabel, IPropertySource propertySource, java.lang.Object propertyId, java.lang.Object newValue)
Constructs a newSetPropertyValueCommand
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
canExecute()
void
execute()
Executes the Command.protected java.lang.Object
getNewValue()
Returns the new value to be set for the property when executing or redoing.protected java.lang.Object
getOldValue()
After the command has been executed or redone, returns the old value of the property orDEFAULT_VALUE
if the property did not have a value before.protected java.lang.Object
getPropertyId()
Returns the id by which to identify the property whose value is to be set.protected IPropertySource
getPropertySource()
Returns theIPropertySource
which provides the property, whose value is to be set.void
redo()
Re-executes the Command.void
undo()
Undoes the changes performed duringexecute()
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Methods inherited from class org.eclipse.gef.commands.Command
canRedo, canUndo, chain, dispose, getDebugLabel, getLabel, setDebugLabel, setLabel
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Constructor Detail
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SetPropertyValueCommand
public SetPropertyValueCommand(java.lang.String propertyLabel, IPropertySource propertySource, java.lang.Object propertyId, java.lang.Object newValue)
Constructs a newSetPropertyValueCommand
.- Parameters:
propertyLabel
- A label to identify the property whose value is set by this command.propertySource
- The property source which provides the property, whose value is to be set.propertyId
- The id of the property whose value is to be set.newValue
- The new value to set for the property orDEFAULT_VALUE
to indicate that the property should be reset.- Since:
- 3.7
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Method Detail
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canExecute
public boolean canExecute()
- Overrides:
canExecute
in classCommand
- Returns:
true
if the command can be executed- See Also:
Command.canExecute()
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execute
public void execute()
Description copied from class:Command
Executes the Command. This method should not be called if the Command is not executable.- Overrides:
execute
in classCommand
- See Also:
Command.execute()
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getNewValue
protected java.lang.Object getNewValue()
Returns the new value to be set for the property when executing or redoing.- Returns:
- the new value or
DEFAULT_VALUE
to indicate that the default value should be set as the new value. - Since:
- 3.7
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getOldValue
protected java.lang.Object getOldValue()
After the command has been executed or redone, returns the old value of the property orDEFAULT_VALUE
if the property did not have a value before.- Returns:
- the old value of the property or
DEFAULT_VALUE
. - Since:
- 3.7
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getPropertyId
protected java.lang.Object getPropertyId()
Returns the id by which to identify the property whose value is to be set.- Returns:
- the id of the property whose value is to be set.
- Since:
- 3.7
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getPropertySource
protected IPropertySource getPropertySource()
Returns theIPropertySource
which provides the property, whose value is to be set.- Returns:
- the
IPropertySource
which provides the property. - Since:
- 3.7
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redo
public void redo()
Description copied from class:Command
Re-executes the Command. This method should only be called afterundo()
has been called.- Overrides:
redo
in classCommand
- See Also:
Command.redo()
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undo
public void undo()
Description copied from class:Command
Undoes the changes performed duringexecute()
. This method should only be called afterexecute
has been called, and only whencanUndo()
returnstrue
.- Overrides:
undo
in classCommand
- See Also:
Command.undo()
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