public class GroupLayout.ParallelGroup extends GroupLayout.Group
Group that aligns and sizes it's children.
ParallelGroup aligns it's children in
four possible ways: along the baseline, centered, anchored to the
leading edge, or anchored to the trailing edge.
ParallelGroup that aligns it's children along the
baseline must first decide where the baseline is
anchored. The baseline can either be anchored to the top, or
anchored to the bottom of the group. That is, the distance between the
baseline and the beginning of the group can be a constant
distance, or the distance between the end of the group and the
baseline can be a constant distance. The possible choices
correspond to the BaselineResizeBehavior constants
CONSTANT_ASCENT and
CONSTANT_DESCENT.
The baseline anchor may be explicitly specified by the
createBaselineGroup method, or determined based on the elements.
If not explicitly specified, the baseline will be anchored to
the bottom if all the elements with a baseline, and that are
aligned to the baseline, have a baseline resize behavior of
CONSTANT_DESCENT; otherwise the baseline is anchored to the top
of the group.
Elements aligned to the baseline are resizable if they have have
a baseline resize behavior of CONSTANT_ASCENT or
CONSTANT_DESCENT. Elements with a baseline resize
behavior of OTHER or CENTER_OFFSET are not resizable.
The baseline is calculated based on the preferred height of each
of the elements that have a baseline. The baseline is
calculated using the following algorithm:
max(maxNonBaselineHeight, maxAscent + maxDescent), where the
maxNonBaselineHeight is the maximum height of all elements
that do not have a baseline, or are not aligned along the baseline.
maxAscent is the maximum ascent (baseline) of all elements that
have a baseline and are aligned along the baseline.
maxDescent is the maximum descent (preferred height - baseline)
of all elements that have a baseline and are aligned along the baseline.
A ParallelGroup that aligns it's elements along the baseline
is only useful along the vertical axis. If you create a
baseline group and use it along the horizontal axis an
IllegalStateException is thrown when you ask
GroupLayout for the minimum, preferred or maximum size or
attempt to layout the components.
Elements that are not aligned to the baseline and smaller than the size
of the ParallelGroup are positioned in one of three
ways: centered, anchored to the leading edge, or anchored to the
trailing edge.
ParallelGroupParallelGroups created with an alignment other than
BASELINE align elements that are smaller than the size
of the group in one of three ways: centered, anchored to the
leading edge, or anchored to the trailing edge.
The leading edge is based on the axis and ComponentOrientation. For the vertical axis the top edge is
always the leading edge, and the bottom edge is always the
trailing edge. When the ComponentOrientation is LEFT_TO_RIGHT, the leading edge is the left edge and the
trailing edge the right edge. A ComponentOrientation of
RIGHT_TO_LEFT flips the left and right edges. Child
elements are aligned based on the specified alignment the
element was added with. If you do not specify an alignment, the
alignment specified for the ParallelGroup is used.
To align elements along the baseline you createBaselineGroup,
or createParallelGroup with an alignment of BASELINE.
If the group was not created with a baseline alignment, and you attempt
to add an element specifying a baseline alignment, an
IllegalArgumentException is thrown.
GroupLayout.createParallelGroup(),
GroupLayout.createBaselineGroup(boolean,boolean)| Modifier and Type | Method and Description |
|---|---|
GroupLayout.ParallelGroup |
addComponent(Component component)
Adds a
Component to this Group. |
GroupLayout.ParallelGroup |
addComponent(Component component,
GroupLayout.Alignment alignment)
Adds a
Component to this ParallelGroup with
the specified alignment. |
GroupLayout.ParallelGroup |
addComponent(Component component,
GroupLayout.Alignment alignment,
int min,
int pref,
int max)
Adds a
Component to this ParallelGroup with the
specified alignment and size. |
GroupLayout.ParallelGroup |
addComponent(Component component,
int min,
int pref,
int max)
Adds a
Component to this Group
with the specified size. |
GroupLayout.ParallelGroup |
addGap(int pref)
Adds a rigid gap to this
Group. |
GroupLayout.ParallelGroup |
addGap(int min,
int pref,
int max)
Adds a gap to this
Group with the specified size. |
GroupLayout.ParallelGroup |
addGroup(GroupLayout.Alignment alignment,
GroupLayout.Group group)
Adds a
Group to this ParallelGroup with the
specified alignment. |
GroupLayout.ParallelGroup |
addGroup(GroupLayout.Group group)
Adds a
Group to this Group. |
public GroupLayout.ParallelGroup addGroup(GroupLayout.Group group)
Group to this Group.addGroup in class GroupLayout.Groupgroup - the Group to addGrouppublic GroupLayout.ParallelGroup addComponent(Component component)
Component to this Group.addComponent in class GroupLayout.Groupcomponent - the Component to addGrouppublic GroupLayout.ParallelGroup addComponent(Component component, int min, int pref, int max)
Component to this Group
with the specified size.addComponent in class GroupLayout.Groupcomponent - the Component to addmin - the minimum size or one of DEFAULT_SIZE or
PREFERRED_SIZEpref - the preferred size or one of DEFAULT_SIZE or
PREFERRED_SIZEmax - the maximum size or one of DEFAULT_SIZE or
PREFERRED_SIZEGrouppublic GroupLayout.ParallelGroup addGap(int pref)
Group.addGap in class GroupLayout.Grouppref - the size of the gapGrouppublic GroupLayout.ParallelGroup addGap(int min, int pref, int max)
Group with the specified size.addGap in class GroupLayout.Groupmin - the minimum size of the gappref - the preferred size of the gapmax - the maximum size of the gapGrouppublic GroupLayout.ParallelGroup addGroup(GroupLayout.Alignment alignment, GroupLayout.Group group)
Group to this ParallelGroup with the
specified alignment. If the child is smaller than the
Group it is aligned based on the specified
alignment.alignment - the alignmentgroup - the Group to addParallelGroupIllegalArgumentException - if alignment is
nullpublic GroupLayout.ParallelGroup addComponent(Component component, GroupLayout.Alignment alignment)
Component to this ParallelGroup with
the specified alignment.alignment - the alignmentcomponent - the Component to addGroupIllegalArgumentException - if alignment is
nullpublic GroupLayout.ParallelGroup addComponent(Component component, GroupLayout.Alignment alignment, int min, int pref, int max)
Component to this ParallelGroup with the
specified alignment and size.alignment - the alignmentcomponent - the Component to addmin - the minimum sizepref - the preferred sizemax - the maximum sizeGroupIllegalArgumentException - if alignment is
null Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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