Objects are adjusted using a virtual grid, calculated according to the position of the controls on the window when loading the program which contains the window.
The virtual grid is only recalculated once the window's ADJUSTMENT property is assigned a value other than "None".
The grid's vertical lines pass through the left side, center and right side of the controls when the HORIZONTAL_ADJUSTMENT property is respectively equal to:
- "Expand" or "Left-align"
- "Center-align"
- "Expand" or "Right-align"
The grid's horizontal lines pass through the top side, center and bottom side of the controls when the VERTICAL_ADJUSTMENT property is respectively equal to:
- "Expand" or "Top-align"
- "Center-align"
- "Expand" or "Bottom-align"
After resizing the window, only the columns that encompass a control whose HORIZONTAL_ADJUSTMENT property is set to "Expand", and only the lines that encompass a control whose VERTICAL_ADJUSTMENT property is set to "Expand", are resized.
The controls retain their position on the grid, which gives them a new position and/or dimension in the window.
When the WINDOW object's ADJUSTMENT property is enabled, resizing the window triggers an automatic adjustment of the position and/or size of the corresponding graphical objects in the window. The graphical adjustment of objects is configured via their HORIZONTAL_ADJUSTMENT and VERTICAL_ADJUSTMENT properties.
Once the user has enlarged the window using the mouse, the list is automatically enlarged (in height and width): its Item code and Item description columns are enlarged. The Quit button is moved to the right, thus maintaining its right-alignment at the end of the list.