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Epsilon User's Manual and Reference
   Commands by Topic
      . . .
      Simple Customizing
         Bindings
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         Updating from an Old Version
         Keys and their Representation
         Customizing the Mouse
      Miscellaneous

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Mouse Keys  Commands by Topic   Miscellaneous


Epsilon User's Manual and Reference > Commands by Topic > Advanced Topics >

Customizing the Mouse

You can rebind the mouse buttons in the same way as other keys using the bind-to-key command, but if, for example, you rebind the left mouse button to copy-region, then that button will copy the region from point to mark, regardless of the location of the mouse. Instead, you might want to use the left button to select a region, and then copy that region. To do this, leave the binding of the left mouse button alone, and instead define a new version of the mouse-left-hook function. By default, this is a subroutine that does nothing. You can redefine it as a keyboard macro using the name-kbd-macro command. Epsilon runs this hook function after you release the left mouse button, if you've used the mouse to select text or position point (but not if, for example, you've clicked on the scroll bar).

Normally Epsilon runs the mouse-select command when you click or double-click the left mouse button, and the mouse-to-tag command when you click or double-click the right mouse button. Epsilon runs the mouse-move command when you move the mouse; this is how it changes the mouse cursor shape or pops up a scroll bar or menu bar when the mouse moves to an appropriate part of the screen, in some environments.

Both mouse-select and mouse-to-tag run the appropriate hook function for the mouse button that invoked them, whenever you use the mouse to select text or position point. The hook functions for the other two mouse buttons are named mouse-right-hook and mouse-center-hook. You can redefine these hooks to make the mouse buttons do additional things after you select text, without having to write new commands using the extension language. (Note that in Epsilon for Windows mouse-to-tag displays a context menu instead of selecting text, by calling the context-menu command, and doesn't call any hook function.)

By default, the center mouse button runs the command mouse-center, which in turn calls the mouse-pan command to make the mouse scroll or pan. Setting the mouse-center-yanks variable makes it perform a different action. Some settings make it call the mouse-yank command, to have the middle mouse button yank text from the clipboard (a traditional function under Unix).

Standard bindings:

  M-<Left>  mouse-select
 M-<Right>  mouse-to-tag
 M-<Center>  mouse-center
 M-<Move>  mouse-move
   mouse-pan
   mouse-yank
   context-menu
 



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