1.0 Procedure:

This scenario will test out the features and behaviour of the null layout manager in a java project with the SWT libraries added.

2.0 Setup:

In a Java Project with the SWT library added, create a new Visual Class.

On to the canvas, drag and drop a Shell from the SWT drawer on the palette.

Then go to the Properties view and verify that the default Layout for the Shell is ‘Null’.

3.0 Basic Canvas Manipulation:

· Drawing SWT components on a Null Layout region:

In turn draw(select, size and drop) a Button, a CheckBox, a RadioButton, Text, TextArea, a Label, a Combo, a Progress Bar and a Slider on to the Shell.

Verify that the components are drawn to the size as selected.

In the source view, verify for each component that “org.eclipse.swt.graphics.Rectangle” is used to set the parameter for Bounds.

And verity that this bounds are the same in the Properties view.

Verify that the size and location of each component can be changed on the Shell using the mouse.

Verify that you can change the bounds in the source, and these changes are reflected in the location and size of the component on the Shell.

Also, verify that by changing these values that this is also refected on the Shell.

Verify that a SWT component cannot be dropped on to the free form.

· Using the Marquee tool:

Using the Marquee tool, verify that all of the SWT components can be selected.

Verify that most of the components are surrounded by white selection marks, except one which should be surrounded by black section marks. The black selection marks indicate that this component was the last selected.

Verify that by resizing one of the components in the group that all the components get resized in sync.

Verify that the selected components can be moved.

· Layout Customization:

Select just a few of the SWT components, hold the CTRL key to do this, on the Shell and bring up the ‘Customize Layout’ dialog.

Select the ‘Align left’ button on the component tab, and verify that this send all of the components to the left margin.

Undo this alignment, using Ctrl+Z or Edit – Undo, and verify that the components return to their original position.

Select the ‘Align center’ button on the component tab, and verify that this send all of the components to the center using the component with the black selection marks as the guide.

Undo this alignment, using Ctrl+Z or Edit – Undo, and verify that the components return to their original position.

Still holding down the Ctrl key, select another component on the right hand side of the Shell. Then select the ‘Align Right’ button. Verify that the component take up a right alignment.

Undo this alignment, using Ctrl+Z or Edit – Undo, and verify that the components return to their original position.

Select the ‘Align top’ button on the component tab, and verify that this send all of the components to the top using the component with the black selection marks as the guide.

Undo this alignment, using Ctrl+Z or Edit – Undo, and verify that the components return to their original position.

Select the ‘Align middle’ button on the component tab, and verify that this send all of the components to the middle using the component with the black selection marks as the guide.

Undo this alignment, using Ctrl+Z or Edit – Undo, and verify that the components return to their original position.

Select the ‘Align bottom’ button on the component tab, and verify that this send all of the components to the bottom using the component with the black selection marks as the guide.

Undo this alignment, using Ctrl+Z or Edit – Undo, and verify that the components return to their original position.

Select the ‘Match width’ button on the component tab, and verify that this resizes all of the components to the same width using the component with the black selection marks as the guide.

Then select the ‘Match height’ button on the component tab, and verify that this resizes all of the components to the same height using the component with the black selection marks as the guide.

Undo this, using Ctrl+Z or Edit – Undo, and verify that the components return to their original position.

Select the ‘Show distribution box’ button on the component tab, and verify that a blue box surrounds the selected components

Then in turn, select the ‘Distribute horizontally’ and the ‘Distribute vertically’ buttons. Verify that the selected components get spaced out as expected.

Undo this, using Ctrl+Z or Edit – Undo, and verify that the components return to their original position.

· Customize Layout – Layout Page:

Select the Shell and open the customize layout dialog. Select the “Layout” tab.

Verify that the grid can be resized and that a margin can be applied to the Shell.

Turn on the “Snap to Grid” feature.

Move some of the components around and verify that the top left corner of the rectangle ‘highlights’ and then ‘snaps’ to the nearest dot.

Turn off the “Snap to Grid” feature and verify that a control can be moved freely.

· Change to other SWT Layouts:

Verify that the layout of the shell can be changed to other SWT layouts, and then verify that this operation can be undone by selecting ‘Undo’.