Examples with InputItem org.csstudio.apputil.ui.formula.InputItem used on opensource projects

Example 1 with InputItem

use of org.csstudio.apputil.ui.formula.InputItem in project org.csstudio.display.builder by kasemir.

the class EditFormulaDialog method determineInputs.

/**
 * @return List of inputs for formula: Each model item is a possible input,
 *          mapped to a variable name that's either already used in the
 *          formula for that model item, or a simple "x1", "x2", ... when
 *          not already used
 */
@SuppressWarnings("nls")
private InputItem[] determineInputs() {
    final Model model = formula.getModel().get();
    // Create list of inputs.
    final ArrayList<InputItem> inputs = new ArrayList<InputItem>();
    // Every model item is a possible input.
    model_loop: for (ModelItem model_item : model.getItems()) {
        // Formula cannot be an input to itself
        if (model_item == formula)
            continue;
        // Create InputItem for that ModelItem
        InputItem input = null;
        // See if model item is already used in the formula
        for (FormulaInput existing_input : formula.getInputs()) {
            if (existing_input.getItem() == model_item) {
                // Yes, use the existing variable name
                input = new InputItem(model_item.getName(), existing_input.getVariableName());
                break;
            }
        }
        // If input is unused, assign variable name x1, x2, ...
        if (input == null) {
            for (InputItem existing_item : inputs) if (existing_item.getInputName().equals(model_item.getName())) {
                // The item with the same name was already added to the input list.
                continue model_loop;
            }
            // Try "x1", then "xx1", "xxx1" until an unused name is found
            String var_name = Integer.toString(inputs.size() + 1);
            boolean name_in_use;
            do {
                name_in_use = false;
                var_name = "x" + var_name;
                for (final FormulaInput existing_input : formula.getInputs()) if (existing_input.getVariableName().equals(var_name)) {
                    name_in_use = true;
                    break;
                }
            } while (name_in_use);
            input = new InputItem(model_item.getName(), var_name);
        }
        inputs.add(input);
    }
    return inputs.toArray(new InputItem[inputs.size()]);
}

Example 2 with InputItem

use of org.csstudio.apputil.ui.formula.InputItem in project org.csstudio.display.builder by kasemir.

the class EditFormulaDialog method open.

/**
 * Open, i.e. display the dialog.
 *  @return <code>true</code> when the item was updated,
 *          <code>false</code> for 'cancel'
 */
public boolean open() {
    try {
        // Edit
        dialog = new FormulaDialog(shell, formula.getExpression(), determineInputs());
        if (dialog.open() != Window.OK)
            return false;
        // Update model item with new formula from dialog
        final Model model = formula.getModel().get();
        final ArrayList<FormulaInput> new_inputs = new ArrayList<FormulaInput>();
        for (final InputItem input : dialog.getInputs()) {
            final ModelItem item = model.getItem(input.getInputName());
            if (item == null)
                // $NON-NLS-1$
                throw new Exception("Cannot locate formula input " + input.getInputName());
            new_inputs.add(new FormulaInput(item, input.getVariableName()));
        }
        // Update formula via undo-able command
        new ChangeFormulaCommand(shell, operations_manager, formula, dialog.getFormula(), new_inputs.toArray(new FormulaInput[new_inputs.size()]));
    } catch (final Exception ex) {
        ExceptionDetailsErrorDialog.openError(shell, Messages.Error, ex);
        return false;
    }
    return true;
}