/**
* Creates enabled preview branch in dialog logic.
*
* @return branch output variables
*/
private static PreviewSwitchOutput fillCheckDisplayCase(
Updater updater,
Scope scope,
final DialogImpl.Elements elements,
ValueSource<Optional<DialogLogic.PreviewContext>> evaluatorValue,
ValueProcessor<Optional<DialogLogic.Expression>> parsedPropertyNameValue) {
// Asynchronous processor that checks property expression in a remote VM
// and returns diagnostic.
final DialogLogic.CheckerResultProcessor checkerResultSource =
new CheckerResultProcessor(evaluatorValue, parsedPropertyNameValue, updater);
updater.addConsumer(scope, checkerResultSource);
updater.addSource(scope, checkerResultSource);
updater.addSource(scope, checkerResultSource.getWarningSource());
updater.addDependency(checkerResultSource, evaluatorValue);
updater.addDependency(checkerResultSource, parsedPropertyNameValue);
// Consumes diagnostic from above and sets it into a label.
ValueConsumer checkerResultConsumer =
new ValueConsumer() {
@Override
public void update(Updater updater) {
elements.getPreviewDisplay().setText(checkerResultSource.getValue());
}
};
updater.addConsumer(scope, checkerResultConsumer);
updater.addDependency(checkerResultConsumer, checkerResultSource);
return new PreviewSwitchOutput() {
@Override
public ValueSource<String> warningSource() {
return checkerResultSource.getWarningSource();
}
};
}
@Override
public void update(Updater updater) {
int requestNumber;
synchronized (monitor) {
requestNumber = ++monitor.requestId;
}
String newValue = calculateValue(requestNumber);
if (newValue == null) {
return;
}
synchronized (monitor) {
monitor.currentValue = newValue;
}
updater.reportChanged(this);
}
/**
* Builds an updater-based dialog logic. This is more a function-style programming inside (to
* better deal with various states and transitions of dialog).
*/
static Handle buildDialogLogic(
final DialogImpl.Elements elements,
final DialogImpl.DialogPreferencesStore dialogPreferencesStore,
final Value uiValue) {
final Updater updater = new Updater();
Scope rootScope = updater.rootScope();
// A global dialog warning collection (those warnings that are not tied to the primary
// result value).
List<ValueSource<String>> warningSources = new ArrayList<ValueSource<String>>(2);
// 'Property expression' editor raw value.
final ValueSource<String> propertyExpressionEditorValue =
new ValueSource<String>() {
private final Text textElement = elements.getExpressionText();
{
String text = dialogPreferencesStore.getExpressionText();
textElement.setText(text);
// Select all expression but a first dot.
int selectionStart = text.startsWith(".") ? 1 : 0; // $NON-NLS-1$
textElement.setSelection(selectionStart, text.length());
addModifyListener(textElement, this, updater);
}
public String getValue() {
return textElement.getText();
}
};
updater.addSource(rootScope, propertyExpressionEditorValue);
// A preview context value. It is constant but optional (so it's passed via updater).
final ValueSource<Optional<DialogLogic.PreviewContext>> evaluatorValue =
createConstant(PreviewContext.build(uiValue), updater);
// Property expression parsed as Expression. Parse errors are kept in Optional.
final ValueProcessor<Optional<DialogLogic.Expression>> parsedPropertyExpressionValue =
createProcessor(
new Gettable<Optional<DialogLogic.Expression>>() {
@Override
public Optional<DialogLogic.Expression> getValue() {
return parseExpression(propertyExpressionEditorValue.getValue());
}
});
updater.addConsumer(rootScope, parsedPropertyExpressionValue);
updater.addSource(rootScope, parsedPropertyExpressionValue);
updater.addDependency(parsedPropertyExpressionValue, propertyExpressionEditorValue);
// 'Show preview' check box value.
final ValueSource<Boolean> previewCheckBoxValue =
new ValueSource<Boolean>() {
private final Button checkBox = elements.getPreviewCheckBox();
{
checkBox.setSelection(dialogPreferencesStore.getPreviewCheck());
addModifyListener(checkBox, this, updater);
}
@Override
public Boolean getValue() {
return checkBox.getSelection();
}
};
// A conditional block that holds optional preview section.
Switcher<Boolean> checkerSwitch = rootScope.addSwitch(previewCheckBoxValue);
PreviewSwitchOutput switchBlockOutput =
fillShowPreviewSwitch(
checkerSwitch,
updater,
rootScope,
elements,
evaluatorValue,
parsedPropertyExpressionValue);
// Preview block may emit warning.
warningSources.add(switchBlockOutput.warningSource());
// 'Add watch expression' check box value.
final ValueSource<Boolean> addWatchExpressionValue =
new ValueSource<Boolean>() {
private final Button checkBox = elements.getAddWatchCheckBox();
{
checkBox.setSelection(dialogPreferencesStore.getAddWatchExpression());
addModifyListener(checkBox, this, updater);
}
@Override
public Boolean getValue() {
return checkBox.getSelection();
}
};
updater.addSource(rootScope, addWatchExpressionValue);
// An OK button implementation that do set property in remote VM.
final ValueProcessor<Optional<? extends Runnable>> okRunnable =
createProcessor(
handleErrors(
new NormalExpression<Runnable>() {
@Calculate
public Runnable calculate(
DialogLogic.PreviewContext previewContext,
DialogLogic.Expression expression) {
return new OkRunnable(
elements.getParentShell(),
expression,
previewContext,
addWatchExpressionValue.getValue());
}
@DependencyGetter
public ValueSource<Optional<DialogLogic.PreviewContext>> previewContextSource() {
return evaluatorValue;
}
@DependencyGetter
public ValueSource<Optional<DialogLogic.Expression>>
parsedPropertyExpressionSource() {
return parsedPropertyExpressionValue;
}
}));
updater.addSource(rootScope, okRunnable);
updater.addConsumer(rootScope, okRunnable);
updater.addDependency(okRunnable, evaluatorValue);
updater.addDependency(okRunnable, parsedPropertyExpressionValue);
updater.addDependency(okRunnable, addWatchExpressionValue);
final OkButtonControl<Runnable> okButtonControl =
new OkButtonControl<Runnable>(okRunnable, warningSources, elements);
updater.addConsumer(rootScope, okButtonControl);
updater.addDependency(okButtonControl, okButtonControl.getDependencies());
return new Handle() {
@Override
public void updateAll() {
updater.updateAll();
}
@Override
public Runnable getOkRunnable() {
return okButtonControl.getNormalValue();
}
@Override
public void saveStateInStore() {
dialogPreferencesStore.setExpressionText(elements.getExpressionText().getText());
dialogPreferencesStore.setPreviewCheck(elements.getPreviewCheckBox().getSelection());
dialogPreferencesStore.setAddWatchExpression(elements.getAddWatchCheckBox().getSelection());
}
};
}
