Interface Dimension
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- All Known Implementing Classes:
FixedDimension,NoDimension,OptimalDimension,RelativeDimension
public interface DimensionRepresents a dimension constraint for a widget.
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description voidcomputeOptimalSize(Widget widget, int availableWidth, int availableHeight, Size optimalSize)Computes the optimal size of a widget.booleanequals(java.lang.Object obj)Indicates whether some other object is "equal to" this one.voidgetAvailableSize(Widget widget, int availableWidth, int availableHeight, Size availableSize)Gets the available size for a widget.inthashCode()Returns a hash code value for the object.voidlayOut(Widget widget, Rectangle bounds)Lays out a widget.
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Method Detail
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getAvailableSize
void getAvailableSize(Widget widget, int availableWidth, int availableHeight, Size availableSize)
Gets the available size for a widget.The given available size is the available width and height minus the outlines.
The given size is updated by this method to set the available size for this dimension.
- Parameters:
widget- the widget.availableWidth- the available width.availableHeight- the available height.availableSize- the available size.
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computeOptimalSize
void computeOptimalSize(Widget widget, int availableWidth, int availableHeight, Size optimalSize)
Computes the optimal size of a widget.The given optimal size is the optimal size of the widget considering the available size.
The given size is updated by this method to set the optimal size for this dimension.
- Parameters:
widget- the widget.availableWidth- the available width.availableHeight- the available height.optimalSize- the optimal size.
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layOut
void layOut(Widget widget, Rectangle bounds)
Lays out a widget.The style of the widget must be set before (not
null).This dimension is applied to compute the widget bounds and align the widget in the given bounds. The given rectangle is updated with the updated bounds.
- Parameters:
widget- the widget.bounds- the bounds of the widget.
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equals
boolean equals(@Nullable java.lang.Object obj)Description copied from class:java.lang.ObjectIndicates whether some other object is "equal to" this one.The
equalsmethod implements an equivalence relation on non-null object references:- It is reflexive: for any non-null reference value
x,x.equals(x)should returntrue. - It is symmetric: for any non-null reference values
xandy,x.equals(y)should returntrueif and only ify.equals(x)returnstrue. - It is transitive: for any non-null reference values
x,y, andz, ifx.equals(y)returnstrueandy.equals(z)returnstrue, thenx.equals(z)should returntrue. - It is consistent: for any non-null reference values
xandy, multiple invocations ofx.equals(y)consistently returntrueor consistently returnfalse, provided no information used inequalscomparisons on the objects is modified. - For any non-null reference value
x,x.equals(null)should returnfalse.
The
equalsmethod for classObjectimplements the most discriminating possible equivalence relation on objects; that is, for any non-null reference valuesxandy, this method returnstrueif and only ifxandyrefer to the same object (x == yhas the valuetrue).Note that it is generally necessary to override the
hashCodemethod whenever this method is overridden, so as to maintain the general contract for thehashCodemethod, which states that equal objects must have equal hash codes.- Overrides:
equalsin classjava.lang.Object- Parameters:
obj- the reference object with which to compare.- Returns:
trueif this object is the same as the obj argument;falseotherwise.- See Also:
Object.hashCode(),HashMap
- It is reflexive: for any non-null reference value
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hashCode
int hashCode()
Description copied from class:java.lang.ObjectReturns a hash code value for the object. This method is supported for the benefit of hash tables such as those provided byHashMap.The general contract of
hashCodeis:- Whenever it is invoked on the same object more than once during an execution of a Java
application, the
hashCodemethod must consistently return the same integer, provided no information used inequalscomparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application. - If two objects are equal according to the
equals(Object)method, then calling thehashCodemethod on each of the two objects must produce the same integer result. - It is not required that if two objects are unequal according to the
Object.equals(java.lang.Object)method, then calling thehashCodemethod on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.
As much as is reasonably practical, the hashCode method defined by class
Objectdoes return distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the JavaTM programming language.)- Overrides:
hashCodein classjava.lang.Object- Returns:
- a hash code value for this object.
- See Also:
Object.equals(java.lang.Object),System.identityHashCode(java.lang.Object)
- Whenever it is invoked on the same object more than once during an execution of a Java
application, the
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