nedit.html

nedit 是一款linux下的开发源码的功能强大的编辑器

and "<A HREF="#Keyboard_Shortcuts">Keyboard Shortcuts</A>".
<P><HR>
</P><P>
<A NAME="Using_the_Mouse"></A>
<H2> Using the Mouse </H2>
</P><P>
Mouse-based editing is what NEdit is all about, and learning to use the more
advanced features like secondary selections and primary selection dragging
will be well worth your while.
</P><P>
If you don't have time to learn everything, you can get by adequately with
just the left mouse button:  Clicking the left button moves the cursor. 
Dragging with the left button makes a selection.  Holding the shift key while
clicking extends the existing selection, or begins a selection between the
cursor and the mouse.  Double or triple clicking selects a whole word or a
whole line.
</P><P>
This section will make more sense if you also read the section called,
"<A HREF="#Selecting_Text">Selecting Text</A>", which explains the terminology of selections, that is,
what is meant by primary, secondary, rectangular, etc.
</P><P>
<H3>Button and Modifier Key Summary</H3>
</P><P>
General meaning of mouse buttons and modifier keys:
</P><P>
<H4>  Buttons</H4>
</P><P>
<PRE>
      Button 1 (left)    Cursor position and primary selection
</PRE>
</P><P>
<PRE>
      Button 2 (middle)  Secondary selections, and dragging and
                         copying the primary selection
</PRE>
</P><P>
<PRE>
      Button 3 (right)   Quick-access programmable menu and pan
                         scrolling
</PRE>
</P><P>
<H4>  Modifier keys</H4>
</P><P>
<PRE>
      Shift   On primary selections, (left mouse button):
                 Extends selection to the mouse pointer
              On secondary and copy operations, (middle):
                 Toggles between move and copy
</PRE>
</P><P>
<PRE>
      Ctrl    Makes selection rectangular or insertion
              columnar
</PRE>
</P><P>
<PRE>
      Alt*    (on release) Exchange primary and secondary
              selections.
</PRE>
</P><P>
<H3>Left Mouse Button</H3>
</P><P>
The left mouse button is used to position the cursor and to make primary
selections.
</P><P>
<PRE>
    Click         Moves the cursor
</PRE>
</P><P>
<PRE>
    Double Click  Selects a whole word
</PRE>
</P><P>
<PRE>
    Triple Click  Selects a whole line
</PRE>
</P><P>
<PRE>
    Quad Click    Selects the whole file
</PRE>
</P><P>
<PRE>
    Shift Click   Adjusts (extends or shrinks) the
                  selection, or if there is no existing
                  selection, begins a new selection
                  between the cursor and the mouse.
</PRE>
</P><P>
<PRE>
    Ctrl+Shift+   Adjusts (extends or shrinks) the
    Click         selection rectangularly.
</PRE>
</P><P>
<PRE>
    Drag          Selects text between where the mouse
                  was pressed and where it was released.
</PRE>
</P><P>
<PRE>
    Ctrl+Drag     Selects rectangle between where the
                  mouse was pressed and where it was
                  released.
</PRE>
</P><P>
<H3>Right Mouse Button</H3>
</P><P>
The right mouse button posts a programmable menu for frequently used commands.
</P><P>
<PRE>
    Click/Drag    Pops up the background menu (programmed
                  from Preferences -&#62; Default Settings -&#62;
                  Customize Menus -&#62; Window Background).
</PRE>
</P><P>
<PRE>
    Ctrl+Drag     Pan scrolling.  Scrolls the window
                  both vertically and horizontally, as if
                  you had grabbed it with your mouse.
</PRE>
</P><P>
<H3>Middle Mouse Button</H3>
</P><P>
The middle mouse button is for making secondary selections, and copying and
dragging the primary selection.
</P><P>
<PRE>
    Click         Copies the primary selection to the
                  clicked position.
</PRE>
</P><P>
<PRE>
    Shift+Click   Moves the primary selection to the
                  clicked position, deleting it from its
                  original position.
</PRE>
</P><P>
<PRE>
    Drag          1) Outside of the primary selection:
                      Begins a secondary selection.
                  2) Inside of the primary selection:
                      Moves the selection by dragging.
</PRE>
</P><P>
<PRE>
    Ctrl+Drag     1) Outside of the primary selection:
                      Begins a rectangular secondary
                      selection.
                  2) Inside of the primary selection:
                      Drags the selection in overlay
                      mode (see below).
</PRE>
</P><P>
When the mouse button is released after creating a secondary selection:
</P><P>
<PRE>
    No Modifiers  If there is a primary selection,
                  replaces it with the secondary
                  selection.  Otherwise, inserts the
                  secondary selection at the cursor
                  position.
</PRE>
</P><P>
<PRE>
    Shift         Move the secondary selection, deleting
                  it from its original position.  If
                  there is a primary selection, the move
                  will replace the primary selection
                  with the secondary selection.
                  Otherwise, moves the secondary
                  selection to to the cursor position.
</PRE>
</P><P>
<PRE>
    Alt*          Exchange the primary and secondary
                  selections.
</PRE>
</P><P>
While moving the primary selection by dragging with the middle mouse button:
</P><P>
<PRE>
    Shift         Leaves a copy of the original
                  selection in place rather than
                  removing it or blanking the area.
</PRE>
</P><P>
<PRE>
    Ctrl          Changes from insert mode to overlay
                  mode (see below).
</PRE>
</P><P>
<PRE>
    Escape        Cancels drag in progress.
</PRE>
</P><P>
Overlay Mode: Normally, dragging moves text by removing it from the selected
position at the start of the drag, and inserting it at a new position
relative to to the mouse. When you drag a block of text over existing
characters, the existing characters are displaced to the end of the
selection.  In overlay mode, characters which are occluded by blocks of text
being dragged are simply removed.  When dragging non-rectangular selections,
overlay mode also converts the selection to rectangular form, allowing it to
be dragged outside of the bounds of the existing text.
</P><P>
Mouse buttons 4 and 5 are usually represented by a mouse wheel nowadays. 
They are used to scroll up or down in the text window.
</P><P>
* The Alt key may be labeled Meta or Compose-Character on some keyboards. 
Some window managers, including default configurations of mwm, bind
combinations of the Alt key and mouse buttons to window manager operations. 
In NEdit, Alt is only used on button release, so regardless of the window
manager bindings for Alt-modified mouse buttons, you can still do the
corresponding NEdit operation by using the Alt key AFTER the initial mouse
press, so that Alt is held while you release the mouse button.  If you find
this difficult or annoying, you can re-configure most window managers to skip
this binding, or you can re-configure NEdit to use a different key
combination.
<P><HR>
</P><P>
<A NAME="Keyboard_Shortcuts"></A>
<H2> Keyboard Shortcuts </H2>
</P><P>
Most of the keyboard shortcuts in NEdit are shown on the right hand sides of
the pull-down menus.  However, there are more which are not as obvious.  These
include; dialog button shortcuts; menu and dialog mnemonics; labeled keyboard
keys, such as the arrows, page-up, page-down, and home; and optional Shift
modifiers on accelerator keys, like [Shift]Ctrl+F.
</P><P>
<H3>Menu Accelerators</H3>
</P><P>
Pressing the key combinations shown on the right of the menu items is a
shortcut for selecting the menu item with the mouse.  Some items have the shift
key enclosed in brackets, such as [Shift]Ctrl+F.  This indicates that the shift
key is optional.  In search commands, including the shift key reverses the
direction of the search.  In Shift commands, it makes the command shift the
selected text by a whole tab stop rather than by single characters.
</P><P>
<H3>Menu Mnemonics</H3>
</P><P>
Pressing the Alt key in combination with one of the underlined characters in
the menu bar pulls down that menu.  Once the menu is pulled down, typing the
underlined characters in a menu item (without the Alt key) activates that
item.  With a menu pulled down, you can also use the arrow keys to select menu
items, and the Space or Enter keys to activate them.
</P><P>
<H3>Keyboard Shortcuts within Dialogs</H3>
</P><P>
One button in a dialog is usually marked with a thick indented outline. 
Pressing the Return or Enter key activates this button.
</P><P>
All dialogs have either a Cancel or Dismiss button.  This button can be
activated by pressing the Escape (or Esc) key.
</P><P>
Pressing the tab key moves the keyboard focus to the next item in a dialog. 
Within an associated group of buttons, the arrow keys move the focus among the
buttons.  Shift+Tab moves backward through the items.
</P><P>
Most items in dialogs have an underline under one character in their name. 
Pressing the Alt key along with this character, activates a button as if you
had pressed it with the mouse, or moves the keyboard focus to the associated
text field or list.
</P><P>
You can select items from a list by using the arrow keys to move the
selection and space to select.
</P><P>
In file selection dialogs, you can type the beginning characters of the file
name or directory in the list to select files
</P><P>
<H3>Labeled Function Keys</H3>
</P><P>
The labeled function keys on standard workstation and PC keyboards, like the
arrows, and page-up and page-down, are active in NEdit, though not shown in the
pull-down menus.
</P><P>
Holding down the control key while pressing a named key extends the scope of
the action that it performs.  For example, Home normally moves the insert
cursor the beginning of a line.  Ctrl+Home moves it to the beginning of the
file. Backspace deletes one character, Ctrl+Backspace deletes one word.
</P><P>
Holding down the shift key while pressing a named key begins or extends a
selection.  Combining the shift and control keys combines their actions.  For
example, to select a word without using the mouse, position the cursor at the
beginning of the word and press Ctrl+Shift+RightArrow.  The Alt key modifies
selection commands to make the selection rectangular.