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<html lang="en">
<head>
<title>ECB - the Emacs Code Browser</title>
<meta http-equiv="Content-Type" content="text/html">
<meta name=description content="ECB - the Emacs Code Browser">
<meta name=generator content="makeinfo 4.2">
<link href="http://www.gnu.org/software/texinfo/" rel=generator-home>
</head>
<body>
<p>
Node:<a name="Possible%20layout-outlines">Possible layout-outlines</a>,
Next:<a rel=next accesskey=n href="The-layout-engine-API.html#The%20layout-engine%20API">The layout-engine API</a>,
Previous:<a rel=previous accesskey=p href="Programming-special-windows.html#Programming%20special%20windows">Programming special windows</a>,
Up:<a rel=up accesskey=u href="The-layout-engine.html#The%20layout-engine">The layout-engine</a>
<hr><br>
<h4>The wide range of possible layout-outlines</h4>
<p>In the two previous sections <a href="Programming-a-new-layout.html#Programming%20a%20new%20layout">Programming a new layout</a> and
<a href="Programming-special-windows.html#Programming%20special%20windows">Programming special windows</a> we have explained in detail how to
program new layouts and how to program new special windows/buffers and
adding them to a new layout.
<p>The intention of this section is to be a summary what are the real
restrictions for a new layout-outline programmed with
<code>ecb-layout-define</code>. This is necessary because until now we just
programmed "obvious" layouts, means layout which are in principle
very similar to the standard ones which means one big edit-window and
some special windows "around" this edit-window. This section will
show you that a layout can have also very different outlines.
<p>OK, here are the real restrictions and conditions for a layout
programmed with <code>ecb-layout-define</code>:
<ol type=1 start=1>
</p><li>It must have exactly one edit-window regardless of its size. The user
of this layout can later split this edit-window in as many
edit-windows as he like.
<li>All other windows created within the <var>CREATE-CODE</var> body of
<code>ecb-layout-define</code> (see <a href="Programming-a-new-layout.html#Programming%20a%20new%20layout">Programming a new layout</a>) must be
dedicated to their buffers.
<li>All the dedicated windows must (exclusive!) either reside on the left,
right, top or left-and-right side of the edit-window. This will be
defined with the <var>TYPE</var>-argument of <code>ecb-layout-define</code>
(see <a href="Programming-a-new-layout.html#Programming%20a%20new%20layout">Programming a new layout</a>).
</ol>
<p>You see, there are only three restrictions/conditions. These and only
these must be fulfilled at layout-programming.
<p>Demonstrating what this really means and how flexible the
layout-engine of ECB really is, can be done best with some
"pathological" layout-outlines. All the following are correct
layouts (working code is added below each layout):
<p>The following is a top layout with three vertical layered special
windows.
<br><pre>------------------------------------------------------------------
| |
| Upper special window |
| |
|----------------------------------------------------------------|
| |
| Middle special window |
| |
|----------------------------------------------------------------|
| |
| Lower special window |
| |
|================================================================|
| |
| Edit-area |
| (can be splitted by the user in several edit-windows) |
------------------------------------------------------------------
| |
| Compilation-window (optional) |
| |
------------------------------------------------------------------
</pre>
<p>Here is the code for that top layout (all buffers are dummy-buffers):
<br><pre>
;; The "window dedicator" functions:
(defecb-window-dedicator ecb-set-usw-buffer "Upper special window"
(switch-to-buffer (get-buffer-create "Upper special window")))
(defecb-window-dedicator ecb-set-msw-buffer "Middle special window"
(switch-to-buffer (get-buffer-create "Middle special window")))
(defecb-window-dedicator ecb-set-lsw-buffer "Lower special window"
(switch-to-buffer (get-buffer-create "Lower special window")))
;; The layout itself:
(ecb-layout-define "example-layout3" top
nil
;; here we have an edit-window and above one top window which we can
;; now split in several other windows. Dependent on the value of
;; `ecb-compile-window-height' we have also a compile-window at the
;; bottom.
(ecb-set-usw-buffer)
(ecb-split-ver 0.33)
(ecb-set-msw-buffer)
(ecb-split-ver 0.5)
(ecb-set-lsw-buffer)
;; select the edit-window.
(select-window (next-window)))
</pre>
<p>The following is a left-right layout which has six special windows in
the left-"column" and one big special window in the
right-"column". For left-right layouts the left-"column" and the
right-"column" have always the same width.
<br><pre>------------------------------------------------------------------
| | | | |
| Left1 | Left5 | | |
| | | | |
|-------------| | | |
| | | | | |
| | | | | |
| | | | | |
| Left2| Left3|-------| Edit-area | Right1 |
| | | | (can be splitted | |
| | | | in several edit- | |
| | | | windows) | |
|-------------| | | |
| | | | |
| Left4 | Left6 | | |
| | | | |
------------------------------------------------------------------
| |
| Compilation-window (optional) |
| |
------------------------------------------------------------------
</pre>
<p>Here is the code for that left-right layout, again with dummy-buffers
(depending to your screen-resolution you will need a quite big value
for <code>ecb-windows-width</code>, e.g. 0.4):
<p>Here is one of the "window dedicator"-functions<a rel=footnote href="#fn-1"><sup>1</sup></a>:
<br><pre>(defecb-window-dedicator ecb-set-left1-buffer "Left1"
(switch-to-buffer (get-buffer-create "Left1")))
</pre>
<p>Here is the layout-definition itself:
<br><pre>(ecb-layout-define "example-layout2" left-right
nil
;; here we have an edit-window and left and right two windows each
;; with width `ecb-windows-width'. Dependent to the value of
;; `ecb-compile-window-height' we have also a compile-window at the
;; bottom.
(ecb-set-left1-buffer)
(ecb-split-hor 0.66 t)
(ecb-split-ver 0.75)
(ecb-set-left4-buffer)
(select-window (previous-window (selected-window) 0))
(ecb-split-ver 0.25 nil t)
(ecb-set-left2-buffer)
(ecb-split-hor 0.5)
(ecb-set-left3-buffer)
(select-window (next-window (next-window)))
(ecb-set-left5-buffer)
(ecb-split-ver 0.5)
(ecb-set-left6-buffer)
(select-window (next-window (next-window)))
(ecb-set-right1-buffer))
;; select the edit-window
(select-window (previous-window (selected-window) 0)))
</pre>
<p>Especially the last example should demonstrate that even very
complicated layouts are easy to program with <code>ecb-layout-define</code>.
If such layouts are senseful is another topic ;-)
<hr><h4>Footnotes</h4>
<ol type="1">
<li><a name="fn-1"></a>
<p>The
``window dedicators'' for all these ecb-windows/buffers are
not explicitly described - they look all like
<code>ecb-set-left1-buffer</code> - of course with different buffer-names!</p>
</ol><hr>
</body></html>
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