1XmRenderTable(library call) XmRenderTable(library call)
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6 XmRenderTable — Data type for a render table
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9 #include <Xm/Xm.h>
10 XmRenderTable
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13 XmRenderTable is the data type for a render table, which contains a ta‐
14 ble of renditions (XmRenditions). Each rendition consists of a set of
15 attributes for rendering text, including a font or fontset, colors,
16 tabs, and lines. Each rendition is identified with a tag.
17 When a compound string is displayed, for each segment in the string,
19 the rendition used to render that string is formed as follows. If the
20 segment has at least one rendition begin tag or if the list of tags
21 formed by accumulating from previous segments the rendition begin tags
22 and removing the rendition end tags is not empty, these tags are
23 matched with renditions in the render table. The effective rendition
24 used to render the segment is formed by successively merging each ren‐
25 dition found into the current rendition with non-XmAS_IS (XmUNSPECI‐
26 FIED_PIXEL for color resources) values for resources in the rendition
27 to be merged, thus replacing the corresponding values of the resources
28 in the current rendition. Finally, if the resulting rendition still has
29 resources with unspecified values and the segment has a locale or
30 charset tag (these are optional and mutually exclusive) this tag is
31 matched with a rendition in the render table, and the missing rendition
32 values are filled in from that entry.
33 If no matching rendition is found for a particular tag, then the XmN‐
35 noRenditionCallback of the XmDisplay object is called and the render
36 table is searched again for that tag.
37 If the resulting rendition does not specify a font or fontset, then for
39 segments whose text type is XmCHARSET_TEXT, the render table will be
40 searched for a rendition tagged with XmFONTLIST_DEFAULT_TAG, and if a
41 matching rendition is found, it will be merged into the current rendi‐
42 tion. If the resulting rendition contains no font or fontset, the XmN‐
43 noFontCallback will be called with the default rendition and "" as the
44 font name. If no rendition matches or no font was found after the call‐
45 back, then the first rendition in the render table will be merged into
46 the current rendition. If this rendition still has no font, then the
47 segment will not be rendered and a warning will be emitted.
48 For segments whose text type is XmMULTIBYTE_TEXT or XmWIDECHAR_TEXT,
50 the render table will be searched for a rendition tagged with
51 _MOTIF_DEFAULT_LOCALE, and, if a matching rendition is found, it will
52 be merged into the current rendition. If the resulting rendition con‐
53 tains no font, the XmNnoFontCallback will be called with the default
54 rendition and "" as the font name. An application can have this call‐
55 back attempt to remedy this problem by calling XmRenditionUpdate on the
56 input rendition to provide a font for the widget to use. This may be
57 done by either providing an alternative font name to be loaded using
58 the XmNfontName and XmNfontType resources or with an already loaded
59 font using the XmNfont resource. If no rendition matches or no font
60 was found after the callback, then the segment will not be rendered and
61 a warning will be issued.
62 Render tables are specified in resource files with the following syn‐
64 tax:
65 resource_spec: [ tag [, tag ]* ]
67 where tag is some string suitable for the XmNtag resource of a rendi‐
69 tion.
70 If no tags are specified, then a render table will be created that is
72 either empty or contains only a rendition with a tag of
73 _MOTIF_DEFAULT_LOCALE.
74 Specific values for specific rendition resources are specified using
76 the following syntax:
77 resource_spec [*|.] rendition[*|.] resource_name: value
79 where:
81 resource_spec
83 Specifies the render table.
84 rendition Is either the class Rendition or a tag.
86 resource_name
88 Is either the class or name of a particular resource.
89 value Is the specification of the value to be set.
91 Any resource line that consists of just a resource name or class compo‐
93 nent with no rendition component or loose binding will be assumed to
94 specify resource values for a rendition with a tag of
95 _MOTIF_DEFAULT_LOCALE. In effect, this creates a default rendition in
96 much the same way that specifying no fontlist tag for a fontlist
97 resource causes the fontlist created to contain an entry tagged with
98 XmFONTLIST_DEFAULT_TAG:
99 resource_spec.resource_name: value
101 For example, the following would set the XmNrenderTable resource of
103 label1 to a render table consisting of three renditions tagged with
104 _MOTIF_DEFAULT_LOCALE, bold, and oblique, with values for resources set
105 as described in the resource specifications.
106 *label1.renderTable: bold, oblique
108 *label1.renderTable.bold.renditionForeground: Green
109 *label1.renderTable.bold.fontName: *-*-*-bold-*-iso8859-1
110 *label1.renderTable.bold.fontType: FONT_IS_FONT
111 *label1.renderTable.oblique.renditionBackground: Red
112 *label1.renderTable.oblique.fontName: *-*-*-italic-*-iso8859-1
113 *label1.renderTable.oblique.fontType: FONT_IS_FONT
114 *label1.renderTable.oblique.underlineType: AS_IS
115 *label1.renderTable.fontName: fixed
116 *label1.renderTable.fontType: FONT_IS_FONT
117 *label1.renderTable.renditionForegound: black
118 *label1.renderTable*tabList: 1in, +1.5in, +3in
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121 XmRenderTableAddRenditions(3), XmRenderTableCopy(3), XmRenderTableCvt‐
122 FromProp(3), XmRenderTableCvtToProp(3), XmRenderTableFree(3), XmRen‐
123 derTableGetRendition(3), XmRenderTableGetRenditions(3), XmRen‐
124 derTableGetTags(3), XmRenderTableRemoveRenditions(3), XmRendition(3),
125 and XmString(3).
126 XmRenderTable(library call)