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litesoft / trunk / GWT_Sandbox / FormEngine / src / com / temp / client / foundation / widget / input / fieldsupport / AbstractInputField.java
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package com.temp.client.foundation.widget.input.fieldsupport; import com.google.gwt.event.dom.client.ChangeEvent; import com.google.gwt.event.dom.client.ChangeHandler; import com.google.gwt.user.client.ui.HasName; import com.google.gwt.user.client.ui.Panel; import com.google.gwt.user.client.ui.Widget; import com.temp.client.foundation.util.UtilsGwt; import com.temp.client.foundation.widget.NameToID; import com.temp.client.foundation.widget.input.InputField; import com.temp.shared.ValueValidator; import com.temp.shared.externalization.E13nData; import com.temp.shared.externalization.E13nResolver; import com.temp.shared.externalization.OptionallyPrefixingE13nResolver; import com.temp.shared.utils.Enableable; import com.temp.shared.utils.ObjectUtils; import com.temp.shared.utils.StringUtils; import com.temp.shared.utils.Validate; import java.util.ArrayList; import java.util.HashSet; import java.util.List; import java.util.Set; /** * Common abstract helper for both the generated Widget and the Proxied versions of the InputField. */ public abstract class AbstractInputField<T, C extends AbstractInputField<T,C>> implements InputField<T> { // Required to be set private String name; // The above must be set/changed BEFORE the widget is attached! // Optionally set private List<ValueValidator<T>> validators = new ArrayList<ValueValidator<T>>(); private Set<ChangeListener<T>> changeListeners = new HashSet<ChangeListener<T>>(); private boolean enabled = true; private State visibility = State.Visible; private StateInputField currentStyleState; private CompleteInputFieldAccessor<T> completeInputFieldAccessor; protected final List<HasName> namedWidgets = new ArrayList<HasName>(); @Override public State getVisibility() { return visibility; } @Override public void setVisibility(State visibility) { visibility = ObjectUtils.deNull(visibility, State.Visible); Panel container = getContainer(); if (container != null) { this.visibility = visibility; container.setVisible(visibility != State.Invisible); UtilsGwt.setHidden(container, visibility == State.Cloaked); } } // Configuration Methods @Override public final String getName() { return name; } @Override public final void setName(String name) { assertBuildMode("setName"); setValidatedName(Validate.noEmptyIdentifier("Name", name)); } @Override public final C name(String name) { assertBuildMode("name"); setValidatedName(Validate.noEmptyIdentifier("Name", name)); return inheritanceLeaf(); } protected void setValidatedName(String name) { this.name = name; } /** * The 'Builder' to 'Run' state transition method fully constructs/populates the InputField's Widget / container. * * @return this for method chaining */ @Override public final void init(E13nResolver resolver) { Validate.notNull("resolver", resolver); if (name == null) { throw new IllegalStateException("Unable to init, Name not set"); } assertBuildMode("init"); resolver = new OptionallyPrefixingE13nResolver(name, resolver); // add our name to keys! completeInputFieldAccessor = buildActualWidget(resolver); completeInputFieldAccessor.init(enabled, // propagate current enabled state new FocusChangedListener() { @Override public void focusChanged() { processFocusChanged(); } }); completeInputFieldAccessor.getInput().addChangeHandler(new ChangeHandler() { @Override public void onChange(ChangeEvent event) { processDataChanged(); } }); } @Override public final boolean isRunMode() { return (completeInputFieldAccessor != null); } @Override public final InputField<T> add(ChangeListener<T> changeListener) { if (changeListener != null) { changeListeners.add(changeListener); } return this; } @Override public final boolean remove(ChangeListener<T> changeListener) { return (changeListener == null) ? false : changeListeners.remove(changeListener); } @Override public final void removeAllChangeListeners() { changeListeners.clear(); } @Override public final ValueValidator<T>[] getValidators() { return ObjectUtils.cast(validators.isEmpty() ? ValueValidator.EMPTY_ARRAY : validators.toArray(new ValueValidator[validators.size()])); } @Override public final InputField<T> add(ValueValidator<T> validator) { if (validator != null) { validators.add(validator); validatorAdded(validator); } return this; } @Override public final InputField<T> add(ValueValidator<T>... additionalValidators) { if (additionalValidators != null) { for (ValueValidator<T> validator : additionalValidators) { add(validator); // null OK will be filter later } } return this; } abstract protected void validatorAdded(ValueValidator<T> validator); private Enableable getEnableable() { return completeInputFieldAccessor; } // Anytime Methods // For Enableable @Override public final boolean isEnabled() { Enableable enableable = getEnableable(); return (enableable != null) ? enableable.isEnabled() : enabled; } @Override public final void setEnabled(boolean enable) { enabled = enable; Enableable enableable = getEnableable(); if (enableable != null) { enableable.setEnabled(enable); } } @Override public final InputField<T> enable() { setEnabled(true); return this; } @Override public final InputField<T> disable() { setEnabled(false); return this; } // For Visible @Override public final boolean isVisible() { return State.Visible == getVisibility(); } @Override public final boolean isCloaked() { return State.Cloaked == getVisibility(); } @Override public final boolean isInvisible() { return State.Invisible == getVisibility(); } @Override public final InputField<T> visible() { setVisibility(State.Visible); return this; } @Override public final InputField<T> cloak() { setVisibility(State.Visible); return this; } @Override public final InputField<T> invisible() { setVisibility(State.Invisible); return this; } // Only callable in Run Mode @Override public final void reset() { checkRunMode("reset").getInput().setValue(null); } @Override public final T setCurrentValue(T value) { InputWidgetChangeFilter<T> input = checkRunMode("setCurrentValue").getInput(); input.setValue(value); return input.getValue(); } @Override public final T getCurrentValue() { return checkRunMode("getCurrentValue").getInput().getValue(); } @Override public final T getBaseValue() { return checkRunMode("getBaseValue").getInput().getBaseValue(); } @Override public final void revert() { InputWidgetChangeFilter<T> input = checkRunMode("revert").getInput(); input.setValue(input.getBaseValue()); } @Override public final boolean isChanged() { return checkRunMode("isChanged").getInput().isChanged(); } @Override public final Boolean isFocused() { CompleteInputFieldAccessor<T> fieldAccessor = checkRunMode("isFocused"); Boolean focused = fieldAccessor.isFocused(); return Boolean.TRUE.equals(focused) ? isVisible() : focused; } @Override public final boolean isErrored() { return (null != checkRunMode("isErrored").getValidator().getErrorData()); } @Override public final boolean validate() { CompleteInputFieldAccessor<T> fieldAccessor = checkRunMode("validate"); E13nData error = fieldAccessor.getValidator().validate(); updateStyle(fieldAccessor); updateErrorLabel(fieldAccessor.getErrorLabel(), error); return (error == null); } @Override public final boolean setFocused() { CompleteInputFieldAccessor<T> fieldAccessor = checkRunMode("setFocused"); return isVisible() && fieldAccessor.setFocused(); } @Override public final E13nResolver getE13nResolver() { return checkRunMode("E13nResolver").getE13nResolver(); } @Override public final Widget getInputWidget() { return checkRunMode("InputWidget").getInputWidget(); } @Override public final InputWidgetChangeFilter<T> getInput() { return checkRunMode("Input").getInput(); } @Override public final InputWidgetValidator<T> getValidator() { return checkRunMode("Validator").getValidator(); } @Override public final Widget getLabelLabel() { return checkRunMode("LabelLabel").getLabelLabel(); } @Override public final Widget getExtendedLabel() { return checkRunMode("ExtendedLabel").getExtendedLabel(); } @Override public final Widget getExampleLabel() { return checkRunMode("ExampleLabel").getExampleLabel(); } @Override public final Widget getErrorLabel() { return checkRunMode("ErrorLabel").getErrorLabel(); } @Override public final Widget getHelpWidget() { return checkRunMode("HelpWidget").getHelpWidget(); } @Override public NameToID addNamedWidgetsTo(NameToID nameToID) { return nameToID.add(namedWidgets); } // Support Methods... protected final <W extends Widget & HasName> W addNamedWidgetWithStyle(W widget, String style) { widget.addStyleName(style); return addNamedWidgetWithNameExtension(widget, style); } protected final <W extends HasName> W addNamedWidgetWithNameExtension(W widget, String nameExtension) { widget.setName(getName() + "_" + nameExtension); return addNamedWidget(widget); } protected final <W extends HasName> W addNamedWidget(W widget) { namedWidgets.add(widget); return widget; } protected void processDataChanged() { updateStyle(checkRunMode("processDataChanged")); for (ChangeListener<T> zListener : changeListeners) { zListener.changed(this); } } protected void processFocusChanged() { updateStyle(checkRunMode("processFocusChanged")); } protected void updateStyle(CompleteInputFieldAccessor<T> fieldAccessor) { updateStyle(StateInputField.BASE // .errored(fieldAccessor.getValidator().getErrorData() != null) // .focused(Boolean.TRUE.equals(fieldAccessor.isFocused())) // .changed(fieldAccessor.getInput().isChanged())); } protected void updateStyle(StateInputField state) { state = ObjectUtils.deNull(state, StateInputField.BASE); if (state != currentStyleState) { Panel panel = getContainer(); if (panel != null) { if (currentStyleState != null) { panel.removeStyleName(currentStyleState.toCSS()); } panel.addStyleName(state.toCSS()); } currentStyleState = state; } } protected String revolve(String method, E13nData error) { if (error != null) { CompleteInputFieldAccessor<T> fieldAccessor = checkRunMode(method); String resolved = fieldAccessor.getE13nResolver().resolve(error); return StringUtils.noEmpty(StringUtils.convertNBSPsToSpaces(resolved)); } return null; } protected final void assertBuildMode(String method) { if (completeInputFieldAccessor != null) { throw new IllegalStateException("Unable to process method '" + method + "' of InputField Named '" + name + "', because no longer in Build Mode (init has already been called)"); } } protected final CompleteInputFieldAccessor<T> checkRunMode(String method) { if (completeInputFieldAccessor == null) { throw new IllegalStateException("Unable to access component/method '" + method + "' of InputField Named '" + name + "', because not in Run Mode (init NOT called)"); } return completeInputFieldAccessor; } protected final CompleteInputFieldAccessor<T> checkRunMode() { return completeInputFieldAccessor; } protected final C inheritanceLeaf() { return ObjectUtils.cast(this); } abstract protected Panel getContainer(); abstract protected void updateErrorLabel(Widget errorLabel, E13nData error); abstract protected CompleteInputFieldAccessor<T> buildActualWidget(E13nResolver resolver); } |