eva/3 Application Builder • Developing eva/3 Applications • Common Informations • Common Properties

Constraints

An attribute’s Constraints determine the position of a component and its ability to expand. An attribute’s constraints interact with the constraints of other components in the Layouts. When the Layout is null-Layout FlowLayout GridLayout or BoxLayout, no Contraints are available.

CardLayout

The CardLayout only has the name of the card as constraints value.

BorderLayout

If BorderLayout is selected, the Constraints can be selected by a ComboBox

The following Constraints are available:
NORTH	The component is placed at the top
SOUTH	The component is placed at the bottom
WEST	The component is placed on the left
EAST	The component is placed on the left
CENTER	The component is placed in the centert

GridBagLayout

Has the parent container a GridBagLayout, the Constraints of all components can be changed(s. fig. 76 ).

Fig. 76: Constraints at GridBagLayout

The following Controls are available:
	Clears the setting of the property and sets its dafult value
	Sets the current selection
Components	ComboBox with the components of the parent container
Properties	The properties of the selected component
Preview	Preview to display the position and size of the components of the parent container
Remove Empty Cells	Removes all Columns and Rows wich do not contain any components. They will be signed by red lines

At Preview and Components, the several components can be selected. The properteies will be shown and can be edited at Properties. The position of the compomponents in the grid can be changed by clicking and moving on the component.

The following properties for the Constraints are available:
Grid X	Horizontal position of the component.
Grid Y	Vertical position of the component
Grid Width	Width of the components relative to other components
Grid Height	Height of the components relative to other components
Weigh X	Width, in percent, of the components relative to other components
Weight Y	Height, in percent, of the components relative to other components
Fill	Component expansion:
Fill		None	Horizontal	Vertical	Both
Anchor	The direction of the components:
		North	Northeast	Page_Start	First_Line_Start
		South	Southwest	Page_End	First_Line_End
		West	Southeast	Line_Start	Last_Line_Start
		East	Center	Line_End	Last_Line_End
		Northwest
Internal Padding X	Horizontal buffer between components in pixel
Internal Padding Y	Vertical buffer between components in pixel
Insets Top	Distance to the component above in pixel
Insets Left	Distance to the component on the left in pixel
Insets Bottom	Distance to the component below in pixel
Insets Right	Distance to the component on the right in pixel

Common Properties