You can use the default size constraints of nodes, or you can set them to provide the look that you want. However, the maximum size of a ScrollPane object is unbounded because typically you do want them to grow to fill their spaces. For example, the maximum size of a Button object defaults to its preferred size because you don't usually want buttons to grow arbitrarily large. UI controls also provide default minimum and maximum sizes that are based on the typical usage of the control. Typically, the computed size is just big enough for the control and the label to be fully visible. For example, the computed size of a Button object is determined by the length of the text and the size of the font used for the label, plus the size of any image. By default, UI controls compute default values for their preferred size that is based on the content of the control. Layouts query the preferred size of their nodes by invoking the prefWidth(height) and prefHeight(width) methods. The LayoutSizingAligning.zip file contains the NetBeans IDE project for the sample. The LayoutSizingAligning.java file contains the source code for the samples described in this topic. This topic provides simple examples for sizing and aligning nodes in a pane. To manage the position of the controls, you can use the alignment properties for the layout panes.

The layout pane then uses your settings to determine the size of the control. If you want more control over the size of controls in your UI, you can set their preferred size range directly. UI controls and layout panes are resizable, but shapes, Text objects, and Group objects are not resizable and are treated as rigid objects in a layout. Note that not all node classes are resizable. As the pane is resized, the nodes are resized according to their preferred size range preferences.

This topic describes techniques for controlling the size and alignment of nodes when placed in a JavaFX layout pane.Ī main advantage of using the built-in JavaFX layout panes is that the size and alignment of nodes is handled by the pane.

Space between buttons on resize