Composite Algorithm
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The composite algorithm specifies the size and position for all child layout nodes. You can use it to create graphics with a predetermined layout or in combination with other algorithms to create more complex shapes.
Parameters
Parameter |
Values |
Description |
|---|---|---|
ar |
Any numeric value. The default is 0. |
Specifies the aspect ratio (width to height) of the composite node to use when determining child constraints. A value of 0 specifies to leave the width and height constraints unaltered. The algorithm may temporarily shrink one dimension to achieve the specified ratio. For example, if a composite node has a width constraint of 20 and height constraint of 10, and if the value of ar is 1.5, the composite algorithm uses a width value of 15 to calculate the composite node’s child constraints. However, the algorithm does not propagate this value to other nodes. |
horzAlign |
|
Aligns all the child nodes in the space reserved for the parent and adjusts child positions along the x-axis. |
vertAlign |
|
Aligns all the child nodes in the space reserved for the parent and adjusts child positions along the y-axis. |
Constraints
Constraint |
Default value |
Description |
|---|---|---|
w |
100 |
Specifies the width of the bounding box for a node. |
h |
100 |
Specifies the height of the bounding box for a node. |
The following constraints specify the size and position of child nodes when combined with w and h constraints. You must specify the constraints 0, 1, and 2 per dimension (x or y) per child node, although the width (w) and height (h) can be specified in the child node.
Constraint |
Default value |
Description |
|---|---|---|
l |
0 |
Left |
ctrX |
Not applicable |
Center x |
r |
Not applicable |
Right |
t |
0 |
Top |
ctrY |
Not applicable |
Center y |
b |
Not applicable |
Bottom |
The following constraints support more complex formulas when they are added to the corresponding constraint.
Constraint |
Default value |
Description |
|---|---|---|
wOff |
0 |
Width offset |
hOff |
0 |
Height offset |
lOff |
0 |
Left offset |
ctrXOff |
0 |
Center x offset |
rOff |
0 |
Right offset |
tOff |
0 |
Top offset |
ctrYOff |
0 |
Center y offset |
bOff |
0 |
Bottom offset |