Bug 17885 Preference Pages don't resize well
Build: 20020521 The Java preference pages don't look very good when the user makes the preference page dialog narrower or shorter by manually resizing it. Here is a breakdown of problems by page: Builder: "Filtered resources" text field should shrink to fit the dialog width more. Classpath Variables: List box should shrink to fit and should scroll if necessary. Code Formatter: Text box should shrink to fit and should scroll if necessary (the scroll bars are there, why aren't they used?). Step Filtering: List box should shrink horizontally to fit and should scroll if necessary (compare vertical and horizontal behaviour when shrinking the preference page dialog). Editor: In the Syntax tab page, the "Preview" text box should shrink to fit and scroll if necessary. Installed JREs: The table viewer should shrink to fit and scroll if necessary. Javadoc: The "Javadoc command" text field should shrink to fit more. Organize Imports: The list box should shrink to fit and scroll if necessary. Templates: The table viewer should shrink to fit and scroll if necessary.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/CodeFormatterPreferencePage.java
String number= textControl.getText();
		IStatus status= validatePositiveNumber(number);
		if (!status.matches(IStatus.ERROR)) {
			fWorkingValues.put(key, number);
		}
		if (PREF_TAB_SIZE.equals(key)) {
			fSourceViewer.getTextWidget().setTabs(getPositiveIntValue(number, 0));
		}			
		updateStatus(status);
		updatePreview();
	}
		
	
	/*
	 * @see IPreferencePage#performOk()
	 */
	public boolean performOk() {
		String[] allKeys= getAllKeys();
		
		
		Hashtable actualOptions= JavaCore.getOptions();
		for (int i= 0; i < allKeys.length; i++) {
			String key= allKeys[i];
			String val=  (String) fWorkingValues.get(key);
			actualOptions.put(key, val);
		}
		JavaCore.setOptions(actualOptions);
		JavaPlugin.getDefault().savePluginPreferences();
		return super.performOk();
	}