SWT write a custom editor of a small ion, want to learn SWT of reference

Edit4
.....\.classpath
.....\.project
.....\bin
.....\...\edit4
.....\...\.....\Edit4Plugin.class
.....\...\.....\editors
.....\...\.....\.......\MultiPageEditor$1.class
.....\...\.....\.......\MultiPageEditor$2.class
.....\...\.....\.......\MultiPageEditor.class
.....\...\.....\.......\MultiPageEditorContributor$1.class
.....\...\.....\.......\MultiPageEditorContributor$2.class
.....\...\.....\.......\MultiPageEditorContributor.class
.....\...\.....\Myedit
.....\...\.....\......\MyCompletionProcessor.class
.....\...\.....\......\MyEditor.class
.....\...\.....\......\MyRuleScanner.class
.....\...\.....\......\MySourceViewerConfig.class
.....\...\.....\preference
.....\...\.....\..........\ColorPreferencePage.class
.....\...\.....\..........\WordPreference$1.class
.....\...\.....\..........\WordPreference$2.class
.....\...\.....\..........\WordPreference.class
.....\...\.....\property
.....\...\.....\........\SamplePropertyPage.class
.....\...\.....\wizards
.....\...\.....\.......\SampleNewWizard$1.class
.....\...\.....\.......\SampleNewWizard$2.class
.....\...\.....\.......\SampleNewWizard.class
.....\...\.....\.......\SampleNewWizardPage$1.class
.....\...\.....\.......\SampleNewWizardPage$2.class
.....\...\.....\.......\SampleNewWizardPage$3.class
.....\...\.....\.......\SampleNewWizardPage.class
.....\build.properties
.....\icons
.....\.....\sample.gif
.....\META-INF
.....\........\MANIFEST.MF
.....\plugin.xml
.....\src
.....\...\edit4
.....\...\.....\Edit4Plugin.java
.....\...\.....\editors
.....\...\.....\.......\MultiPageEditor.java
.....\...\.....\.......\MultiPageEditorContributor.java
.....\...\.....\Myedit
.....\...\.....\......\MyCompletionProcessor.java
.....\...\.....\......\MyEditor.java
.....\...\.....\......\MyRuleScanner.java
.....\...\.....\......\MySourceViewerConfig.java
.....\...\.....\preference
.....\...\.....\..........\ColorPreferencePage.java
.....\...\.....\..........\WordPreference.java
.....\...\.....\property
.....\...\.....\........\SamplePropertyPage.java
.....\...\.....\wizards
.....\...\.....\.......\SampleNewWizard.java
.....\...\.....\.......\SampleNewWizardPage.java

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