7.3 Mouse Context
The mouse context function presents the user with information about the
function of each mouse button. Various functions within XID make use of
the mouse buttons so their default meaning may change from one function to
the next. Each set of definitions is called a context. If more
than three functions are required for a given context (assuming a 3-button
mouse), a pulldown menu at the button of the panel labelled Additional
is used accomodate the additional functions.
The default context is the Image context. In the image context, the
left mouse button is used to select a full resolution window, the middle
mouse button is used to select an area to zoom around, and the right mouse
button has no function. The additional pulldown menu allows the
user to increase and decrease the zoom factor. Various options from the
GOF functions add additional contexts. The user may change contexts
by selecting it from the option menu at the top of the panel.
One example when this may be necessary is when the user wishes to load a new
full resolution or zoom window while selecting or editing graphics data.
- Context Option Menu:
- Select the new context from the list of available contexts. The
mouse button function area will change to show the user the function of each
mouse button for the selected context.
- Mouse Button Function Area:
- This area gives the user a short description of the function of each mouse
button for the currently selected context.
- Additional Pulldown Menu:
- A list of functions for the currently selected context that are not
accessible from a mouse button. This menu will be insensitive if there
are no additional options available for the current context.
- Dismiss:
- Close the mouse context panel.