Gnumeric

Gnumeric is the GNOME spreadsheet program[7]. It uses the canvas as its main display engine to allow for easy event handling, extensibility through components, and flicker-free display.

Gnumeric defines several custom canvas item types:

• An ItemGrid item which takes care of displaying all the cells in the spreadsheet. This draws the actual grid and the cell contents, with support for different fonts and colors.

• An ItemCursor item that takes care of displaying the specialized selection and active cell combo `cursor', as well as its decorations. The selection has a thick outline which the user can drag to move cells around, and it also has a little rectangle that can be used for the auto-fill function.

• An ItemBar item that displays row and column headings for the spreadsheet. The user can drag the edges of the ``buttons'' that represent rows and columns to resize these. The user can also click and drag on the buttons themselves to select whole rows or columns in the spreadsheet.

In addition, Gnumeric uses some of the primitive canvas item types such as rectangles, ellipses, and lines to display miscellaneous elements of the user interface.