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| Marker help and resolution |
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| <h3>Marker help and resolution</h3> |
| <p>In <a href="resAdv_markers.htm">Resource markers</a>, we saw how plug-ins can |
| define specialized marker types in order to annotate resources with |
| information. The <a href="../samples/org.eclipse.ui.examples.readmetool/doc-html/ui_readmetool_ex.html">readme |
| tool</a> example defines its own markers in order to demonstrate two |
| marker-related workbench extensions: <b>marker help</b> and <b>marker |
| resolutions</b>. The marker definition is in the readme plug-in's manifest |
| markup:</p> |
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| <pre><extension id="readmemarker" point="org.eclipse.core.resources.markers" name="%ReadmeMarker.name"> |
| <super type="org.eclipse.core.resources.taskmarker"/> |
| <super type="org.eclipse.core.resources.textmarker"/> |
| <persistent value="true"/> |
| <attribute name="org.eclipse.ui.examples.readmetool.id"/> |
| <attribute name="org.eclipse.ui.examples.readmetool.level"/> |
| <attribute name="org.eclipse.ui.examples.readmetool.department"/> |
| <attribute name="org.eclipse.ui.examples.readmetool.code"/> |
| <attribute name="org.eclipse.ui.examples.readmetool.language"/> |
| </extension> </pre> |
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| <p>The tool defines a marker that inherits from the platform's text marker and |
| task marker. It also defines named attributes for the marker. |
| Marker attributes can be set and queried.</p> |
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| <p>Since the new readme marker is a kind of text marker, it |
| inherits the text marker attributes. The text marker attributes include |
| the character location of the marker.</p> |
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| <p>Markers can be added to a <b>.readme</b> file using the readme editor's popup |
| menu. (The popup menu actions are added dynamically in <b>ReadmeTextEditor.<font SIZE="2" COLOR="#000000">editorContextMenuAboutToShow(IMenuManager</font> |
| </b><font SIZE="2" COLOR="#000000"><b>parentMenu)</b>). Once added, |
| the markers appear on the left side of the editor and in the tasks view.</font></p> |
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| <p><img src="images/readmemarkermenu.png" alt="Readme editor with readme markers on left side ruler" border="0"></p> |
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