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<html lang="en">
<head>
<title>ECB - the Emacs Code Browser</title>
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<body>
<p>
Node:<a name="Using%20the%20mouse">Using the mouse</a>,
Next:<a rel=next accesskey=n href="Using-the-keyboard.html#Using%20the%20keyboard">Using the keyboard</a>,
Previous:<a rel=previous accesskey=p href="Usage-of-ECB.html#Usage%20of%20ECB">Usage of ECB</a>,
Up:<a rel=up accesskey=u href="Usage-of-ECB.html#Usage%20of%20ECB">Usage of ECB</a>
<hr><br>
<h3>Working with the mouse in the ECB-windows</h3>
<p>Normally you get best usage if you use ECB with a mouse. ECB
distinguishes between a <dfn>primary</dfn> and a <dfn>secondary</dfn>
mouse-button.
<p>With the option <code>ecb-primary-secondary-mouse-buttons</code> the following
combinations of primary and secondary mouse-buttons are possible:
<ul>
<li>primary: mouse-2, secondary: C-mouse-2<a rel=footnote href="#fn-1"><sup>1</sup></a>. This is the default.
<li>primary: mouse-1, secondary: C-mouse-1
<li>primary: mouse-1, secondary: mouse-2
</ul>
<p>If you change this during ECB is activated you must deactivate and activate
ECB again to take effect.
<h4>The primary mouse-button</h4>
<p>A click with the primary button causes the main effect in each ECB-buffer:
<ul>
<li>ECB Directories:
Expanding/collapsing nodes and displaying files in the ECB-Sources
buffer.
<li>ECB sources/history:
Opening the file in that edit-window specified by the option
<code>ecb-mouse-click-destination</code>.
<li>ECB Methods:
Jumping to the method in that edit-window specified by the option
<code>ecb-mouse-click-destination</code>.
</ul>
<h4>The POWER- or SHIFT-click</h4>
<p>A click with the primary mouse-button while the SHIFT-key is pressed
is called the POWER-click and does the following (depending on the
ECB-buffer where the POWER-click occurs):
<ul>
<li>ECB Directory:
Refreshing the directory-contents-cache (see
<code>ecb-cache-directory-contents</code>).
<li>ECB sources/history:
Only displaying the source-contents in the method-buffer but not
displaying the source-file in an edit-window. This means it opens the
clicked source only in the background and shows all its
methods/variables in ECB-Methods; the buffer of the edit-window is not
changed! This is very useful to get only an overlook for a certain
source.
<li>ECB Methods:
Narrowing to the clicked method/variable/ect... (see
<code>ecb-tag-visit-post-actions</code>). But this works only for sources
parsed by semantic, not by imenu or etags!
</ul>
<p>Per default the complete node-name of an item in a tree-buffer is
displayed in the echo-area if the mouse moves over it, regardless if
the related window is the active one or not. You get the same effect
always after a POWER-click. In general: Via
<code>ecb-show-node-info-in-minibuffer</code> you can specify in a detailed
manner for every ECB tree-buffer when and which node-info should be
displayed in the minibuffer.
<h4>The secondary mouse-button</h4>
<p>The secondary mouse-button is for opening (jumping to) the file in
another edit-window (see the documentation of the option
<code>ecb-mouse-click-destination</code>).
<h4>The right mouse-button</h4>
<p>In each ECB-buffer mouse-3 (= right button) opens a special context
popup-menu for the clicked item where you can choose several senseful
actions.
<p>With the options <code>ecb-directories-menu-user-extension</code>,
<code>ecb-sources-menu-user-extension</code>,
<code>ecb-methods-menu-user-extension</code> and
<code>ecb-history-menu-user-extension</code> you can add statically new
commands to the popup-menus. See the docstring of
<code>ecb-directories-menu-user-extension</code> for more details.
<p>With the options <code>ecb-directories-menu-user-extension-function</code>,
<code>ecb-sources-menu-user-extension-function</code>,
<code>ecb-methods-menu-user-extension-function</code> and
<code>ecb-history-menu-user-extension-function</code> you can add new
commands to the popup-menus in a dynamic manner. See the docstring of
<code>ecb-directories-menu-user-extension-function</code> for more details.
<p>With the options <code>ecb-directories-menu-sorter</code>,
<code>ecb-sources-menu-sorter</code>, <code>ecb-methods-menu-sorter</code> and
<code>ecb-history-menu-sorter</code> you can even re-arrange all the entries
of the popup-menus.
<h4>Horizontal scrolling with the mouse</h4>
<p>In each tree-buffer of ECB you can easily scroll left and right with
the mouse if the option <code>ecb-tree-easy-hor-scroll</code> is not
<code>nil</code>.
<p>The reason for this is: XEmacs has horizontal scroll-bars so invisible
parts beyond the right window-border of a tree-buffer can always made
visible very easy.
<p>GNU Emacs does not have hor. scroll-bars so especially with the mouse
it is quite impossible to scroll smoothly right and left. The
functions <code>scroll-left</code> and <code>scroll-right</code> can be annoying
and are also not bound to mouse-buttons.
<p>ECB offers three ways for smoothly hor. scrolling with GNU Emacs if
<code>ecb-tree-easy-hor-scroll</code> is a positive integer-value S:
<ul>
<li>In all ECB-tree-buffers the keys <kbd>M-mouse-1</kbd> and <kbd>M-mouse-3</kbd>
are bound to scrolling left rsp. right with scroll-step S.
<li>Clicking with mouse-1 or mouse-2 onto the edge of the modeline has the
same effect, i.e. if you click with mouse-1 onto the left \(resp
right) edge of the modeline you will scroll left \(resp. right) with
scroll-step S.
<li>Additionally <kbd>C-M-mouse-1</kbd> and <code>C-M-mouse-3</code> are bound to
scrolling left rsp. right with scroll-step <code>window-width</code> - 2.
</ul>
<p>This is NOT done for XEmacs cause of its horizontal scrollbars. If you
want scrolling left and right with the mouse in XEmacs then activate
the horizontal scrollbars.
<hr><h4>Footnotes</h4>
<ol type="1">
<li><a name="fn-1"></a>
<p>means mouse-2 while CTRL-key
is pressed.</p>
</ol><hr>
</body></html>
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