diff options
Diffstat (limited to 'core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/preferences/formatter/ModifyDialogTabPage.java')
| -rw-r--r-- | core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/preferences/formatter/ModifyDialogTabPage.java | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/preferences/formatter/ModifyDialogTabPage.java b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/preferences/formatter/ModifyDialogTabPage.java index 4401c3080c0..65101096722 100644 --- a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/preferences/formatter/ModifyDialogTabPage.java +++ b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/preferences/formatter/ModifyDialogTabPage.java @@ -69,6 +69,18 @@ public abstract class ModifyDialogTabPage implements IModifyDialogTabPage { }; /** + * Preference validator + */ + interface PreferenceValidator { + /** + * Validate callback + * @param value The value to be checked + * @return String error or null otherwise + */ + String validate(String value); + } + + /** * The base class of all Preference classes. A preference class provides a wrapper * around one or more SWT widgets and handles the input of values for some key. * On each change, the new value is written to the map and the listeners are notified. @@ -77,6 +89,7 @@ public abstract class ModifyDialogTabPage implements IModifyDialogTabPage { private final Map<String, String> fPreferences; private boolean fEnabled; private String fKey; + private PreferenceValidator fValidator; /** * Create a new Preference. @@ -143,6 +156,22 @@ public abstract class ModifyDialogTabPage implements IModifyDialogTabPage { * of this object has changed (enabled, key, ...). */ protected abstract void updateWidget(); + + public void setValidator(PreferenceValidator validator) { + fValidator = validator; + } + + /** + * Check if preference is valid according to its validator + * @param value The preference value + * @return Null if valid, the error string otherwise + */ + protected String isValid(String value) { + if (fValidator != null) { + return fValidator.validate(value); + } + return null; + } } /** @@ -319,6 +348,126 @@ public abstract class ModifyDialogTabPage implements IModifyDialogTabPage { } /** + * Wrapper around a textfied + */ + protected final class StringPreference extends Preference { + + private final Label fLabel; + private final Text fText; + + protected String fSelected; + protected String fOldSelected; + + /** + * Create a new NumberPreference. + * @param composite The composite on which the SWT widgets are added. + * @param numColumns The number of columns in the composite's GridLayout. + * @param preferences The map to store the values. + * @param key The key to store the values. + * @param text The label text for this Preference. + */ + public StringPreference(Composite composite, int numColumns, Map<String, String> preferences, String key, + String text) { + super(preferences, key); + + fLabel = createLabel(numColumns - 1, composite, text, GridData.FILL_HORIZONTAL); + fText = new Text(composite, SWT.SINGLE | SWT.BORDER | SWT.LEFT); + fText.setFont(composite.getFont()); + + fText.setLayoutData( + createGridData(1, GridData.HORIZONTAL_ALIGN_END, fPixelConverter.convertWidthInCharsToPixels(20))); + + updateWidget(); + + fText.addFocusListener(new FocusListener() { + @Override + public void focusGained(FocusEvent e) { + StringPreference.this.focusGained(); + } + + @Override + public void focusLost(FocusEvent e) { + StringPreference.this.focusLost(); + } + }); + + fText.addModifyListener(new ModifyListener() { + @Override + public void modifyText(ModifyEvent e) { + fieldModified(); + } + }); + } + + private IStatus createErrorStatus(String error) { + return new Status(IStatus.ERROR, CUIPlugin.getPluginId(), 0, Messages.format(error), null); + } + + protected void focusGained() { + fOldSelected = fSelected; + fText.setSelection(0, fText.getCharCount()); + } + + protected void focusLost() { + updateStatus(null); + final String input = fText.getText(); + if (validInput(input) != null) + fSelected = fOldSelected; + else + fSelected = input; + if (fSelected != fOldSelected) { + saveSelected(); + fText.setText(fSelected); + } + } + + protected void fieldModified() { + final String trimInput = fText.getText().trim(); + final String error = validInput(fText.getText()); + + updateStatus(error == null ? null : createErrorStatus(error)); + + if (error == null) { + if (fSelected.equals(trimInput)) { + fSelected = trimInput; + saveSelected(); + } + } + } + + private String validInput(String input) { + return isValid(input); + } + + private void saveSelected() { + getPreferences().put(getKey(), fSelected); + setChanged(); + notifyObservers(); + } + + @Override + protected void updateWidget() { + final boolean hasKey = getKey() != null; + + fLabel.setEnabled(hasKey && getEnabled()); + fText.setEnabled(hasKey && getEnabled()); + + if (hasKey) { + String s = getPreferences().get(getKey()); + fSelected = s; + fText.setText(s); + } else { + fText.setText(""); //$NON-NLS-1$ + } + } + + @Override + public Control getControl() { + return fText; + } + } + + /** * Wrapper around a textfied which requests an integer input of a given range. */ protected final class NumberPreference extends Preference { @@ -901,6 +1050,17 @@ public abstract class ModifyDialogTabPage implements IModifyDialogTabPage { * Convenience method to create a NumberPreference. The widget is registered as * a potential focus holder, and the default updater is added. */ + protected StringPreference createStringPref(Composite composite, int numColumns, String name, String key) { + final StringPreference pref = new StringPreference(composite, numColumns, fWorkingValues, key, name); + fDefaultFocusManager.add(pref); + pref.addObserver(fUpdater); + return pref; + } + + /* + * Convenience method to create a NumberPreference. The widget is registered as + * a potential focus holder, and the default updater is added. + */ protected NumberPreference createNumberPref(Composite composite, int numColumns, String name, String key, int minValue, int maxValue) { final NumberPreference pref = new NumberPreference(composite, numColumns, fWorkingValues, key, minValue, |