1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
<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="Style%20basics">Style basics</a>,
Next:<a rel=next accesskey=n href="Ascii-based-styles.html#Ascii-based%20styles">Ascii-based styles</a>,
Up:<a rel=up accesskey=u href="Tree-buffer-styles.html#Tree-buffer%20styles">Tree-buffer styles</a>
<hr><br>
<h4>Basic knowledge about the styles</h4>
<p>There are nine image-names which define the control- and guide-symbols
to draw the tree. Here is the list of the allowed image-names and the
related corresponding ascii-symbols:
<ul>
<li>open ("[-]"):
The control-symbol displayed for an opened tree-node which has several
subnodes. Clicking onto this control closes the node.
<li>close ("[+]"):
The control-symbol displayed for a closed tree-node, i.e. an
expandable node with subnodes but all subnodes are hidden. Clicking
onto this control opened the node and displays its subnodes - if
there are any. If it has no subnodes the empty-symbol will be
displayed.
<li>empty ("[x]"):
The symbol displayed for an empty node. An empty node is a
node which could have subnodes but has currently none.
<li>leaf ("*"):
The symbol displayed for a node which can not have any subnodes so it
is a "leaf" in the tree.
<li>guide (" |"):
The symbol used for drawing vertical "guide-lines" for opened nodes.
See the example below.
<li>no-guide (" "):
Sometimes invisible guide-lines are needed to draw the tree.
<li>end-guide (" `"):
The symbol used for the guide-line of the last subnode of an opened
node.
<li>handle ("-"):
The symbol displayed before every subnode. Each handle is connected to
a guide-line - either a normal guide or an end-guide.
<li>no-handle (" "):
An invisible handle.
</ul>
<p>A tree will be build-up with these elements like follows:
<br><pre>[-] node-with-subnodes (open)
|-[+] not-empty-subnode1 (guide+handle+close)
|-[X] empty-subnode (guide+handle+empty)
`-[-] not-empty-subnode2 (end-guide+handle+open)
|-* leaf-1 (no-guide+no-handle+guide+handle+leaf)
`-* leaf-2 (no-guide+no-handle+end-guide+handle+leaf)
</pre>
</body></html>
|