An Array of ConstraintColumn instances that partition this container. The ConstraintColumn instance at index 0 is the left-most column; indices increase from left to right.

An Array of ConstraintRow instances that partition this container. The ConstraintRow instance at index 0 is the top-most row; indices increase from top to bottom.

Constructor.

Calculates the preferred minimum and preferred maximum sizes of the Canvas.

The measuredWidth of the Canvas is just large enough to display all of its children at their preferred widths without clipping them. This measure() method calculates the position of the right-most child, calculates the position of that child's right edge, and then adds room for the thickness of the Canvas container's border and the right padding. The measuredHeight is calculated similarly.

The Canvas container's minWidth and minHeight properties are not calculated, so Flex uses a default value of 0.

The Canvas container's maxWidth and maxHeight properties are not calculated. The container is assumed to have an infinite maximum width and height.

All of the values described previously are the measured widths and heights of Canvas. The user can override the measured values by calling the explicitly supplying a value for the following properties:

• width
• height
• minWidth
• minHeight
• maxWidth
• maxHeight

You should not call this method directly. The Flex LayoutManager calls it at the appropriate time. At application startup, the Flex LayoutManager attempts to measure all components from the children to the parents before setting them to their final sizes.

This is an advanced method for use in subclassing. If you override this method, your implementation must either call the super.measure() method or set the measuredHeight and measuredWidth properties. You may also optionally set the following properties:

• measuredMinWidth
• measuredMinHeight

Sets the size of each child of the container.

Canvas does not change the positions of its children. Each child is positioned according to the values of its x and y properties.

Canvas does set each child's width and height to be equal to that child's measuredWidth and measuredHeight if no width and height values are supplied. The child can also be made resizable by setting width and/or height to a percent value. Resizable children are bound by the right and bottom edges of the Canvas container. In this case, the child's minWidth, minHeight, maxWidth, and maxHeight values are honored.

You should not call this method directly. The Flex LayoutManager calls it at the appropriate time. At application startup, the Flex LayoutManager calls updateDisplayList() method on every component, starting with the Application object and working downward.

This is an advanced method for use in subclassing. If you override this method, your implementation should call the super.updateDisplayList() method and call the move() and setActualSize() methods on each of the children. For the purposes of performing layout, you should get the size of this container from the unscaledWidth and unscaledHeight properties, not the width and height properties. The width and height properties do not take into account the value of the scaleX and scaleY properties for this container.

Parameters