ingo@42: package de.intevation.flys.client.client.ui;
ingo@42: 
ingo@42: import java.util.Map;
ingo@42: 
ingo@42: import com.google.gwt.core.client.GWT;
ingo@42: import com.google.gwt.i18n.client.NumberFormat;
ingo@42: 
ingo@42: import com.smartgwt.client.types.Alignment;
ingo@42: import com.smartgwt.client.widgets.form.DynamicForm;
ingo@42: import com.smartgwt.client.widgets.form.fields.FloatItem;
ingo@42: import com.smartgwt.client.widgets.form.fields.FormItem;
ingo@42: import com.smartgwt.client.widgets.form.fields.StaticTextItem;
ingo@42: import com.smartgwt.client.widgets.form.fields.events.BlurHandler;
ingo@42: 
ingo@211: import de.intevation.flys.client.client.FLYSConstants;
ingo@42: 
ingo@42: 
ingo@42: 
ingo@42: /**
ingo@42:  * This class creates a DynamicForm with three input fields.
ingo@42:  *
ingo@42:  * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
ingo@42:  */
ingo@42: public class DoubleRangePanel
ingo@42: extends      DynamicForm
ingo@42: {
ingo@42:     /** The message class that provides i18n strings.*/
ingo@211:     protected FLYSConstants MESSAGES = GWT.create(FLYSConstants.class);
ingo@42: 
ingo@42: 
ingo@42:     /** The constant name of the input field to enter the start of a distance.*/
ingo@42:     public static final String FIELD_FROM = "from";
ingo@42: 
ingo@42:     /** The constant name of the input field to enter the end of a distance.*/
ingo@42:     public static final String FIELD_TO = "to";
ingo@42: 
ingo@42:     /** The constant name of the input field to enter the step width of a
ingo@42:      * distance.*/
ingo@42:     public static final String FIELD_WIDTH = "step";
ingo@42: 
ingo@42: 
ingo@42:     /**
ingo@42:      * Creates a new form with a single input field that displays an array of
ingo@42:      * double values.
ingo@42:      *
ingo@42:      * @param name The name of the TextItem.
ingo@42:      * @param title The title of the TextItem.
ingo@42:      * @param values The double values that should be displayed initially.
ingo@42:      * @param handler The BlurHandler that is used to valide the input.
ingo@42:      */
ingo@42:     public DoubleRangePanel(
ingo@42:         String titleFrom, String titleTo, String titleStep,
ingo@42:         double from, double to, double step,
ingo@42:         int width,
ingo@42:         BlurHandler handler)
ingo@42:     {
ingo@42:         FloatItem fromItem = new FloatItem(FIELD_FROM);
ingo@42:         FloatItem toItem   = new FloatItem(FIELD_TO);
ingo@42:         FloatItem stepItem = new FloatItem(FIELD_WIDTH);
ingo@42: 
ingo@42:         fromItem.addBlurHandler(handler);
ingo@42:         toItem.addBlurHandler(handler);
ingo@42:         stepItem.addBlurHandler(handler);
ingo@42: 
ingo@42:         NumberFormat f = NumberFormat.getDecimalFormat();
ingo@42: 
ingo@42:         fromItem.setValue(f.format(from));
ingo@42:         toItem.setValue(f.format(to));
ingo@42:         stepItem.setValue(f.format(step));
ingo@42: 
ingo@42:         StaticTextItem fromText = new StaticTextItem("staticFrom");
ingo@42:         fromText.setValue(titleFrom);
ingo@42:         fromText.setShowTitle(false);
ingo@42:         fromItem.setShowTitle(false);
ingo@42: 
ingo@42:         StaticTextItem toText = new StaticTextItem("staticTo");
ingo@42:         toText.setValue(titleTo);
ingo@42:         toText.setShowTitle(false);
ingo@42:         toItem.setShowTitle(false);
ingo@42: 
ingo@42:         StaticTextItem stepText = new StaticTextItem("staticStep");
ingo@42:         stepText.setValue(titleStep);
ingo@42:         stepText.setShowTitle(false);
ingo@42:         stepItem.setShowTitle(false);
ingo@42: 
ingo@42:         int itemWidth = width / 6;
ingo@42:         fromItem.setWidth(itemWidth);
ingo@42:         fromText.setWidth(itemWidth);
ingo@42:         toItem.setWidth(itemWidth);
ingo@42:         toText.setWidth(itemWidth);
ingo@42:         stepItem.setWidth(itemWidth);
ingo@42:         stepText.setWidth(itemWidth);
ingo@42: 
ingo@42:         setFields(fromItem, fromText, toItem, toText, stepItem, stepText);
ingo@42:         setFixedColWidths(false);
ingo@42:         setNumCols(6);
ingo@42:         setWidth(width);
ingo@42:         setAlign(Alignment.CENTER);
ingo@42:     }
ingo@42: 
ingo@42: 
ingo@42:     /**
ingo@42:      * This method validates the entered text in the input fields. If
ingo@42:      * there are values that doesn't represent a valid float, an error is
ingo@42:      * displayed.
ingo@42:      *
ingo@42:      * @param item The FormItem.
ingo@42:      */
ingo@42:     protected boolean validateForm(FormItem item) {
ingo@59:         if (item instanceof StaticTextItem) {
ingo@59:             return true;
ingo@59:         }
ingo@59: 
ingo@42:         boolean valid = true;
ingo@42: 
ingo@42:         String v = (String) item.getValue();
ingo@42: 
ingo@42:         NumberFormat f = NumberFormat.getDecimalFormat();
ingo@42:         Map errors     = getErrors();
ingo@42: 
ingo@42:         try {
ingo@42:             double value = f.parse(v);
ingo@42: 
ingo@42:             errors.remove(item.getFieldName());
ingo@42:         }
ingo@42:         catch (NumberFormatException nfe) {
ingo@42:             errors.put(item.getFieldName(), MESSAGES.wrongFormat());
ingo@42: 
ingo@42:             item.focusInItem();
ingo@42: 
ingo@42:             valid = false;
ingo@42:         }
ingo@42: 
ingo@42:         setErrors(errors, true);
ingo@42: 
ingo@42:         return valid;
ingo@42:     }
ingo@42: 
ingo@42: 
ingo@42:     /**
ingo@42:      * Returns the double value of <i>value</i>.
ingo@42:      *
ingo@42:      * @return the double value of <i>value</i>.
ingo@42:      */
ingo@42:     protected double getDouble(String value) {
ingo@42:         NumberFormat f = NumberFormat.getDecimalFormat();
ingo@42: 
ingo@42:         return f.parse(value);
ingo@42:     }
ingo@42: 
ingo@42: 
ingo@42:     /**
ingo@42:      * Returns the start value.
ingo@42:      *
ingo@42:      * @return the start value.
ingo@42:      */
ingo@42:     public double getFrom() {
ingo@42:         String v = getValueAsString(FIELD_FROM);
ingo@42: 
ingo@42:         return getDouble(v);
ingo@42:     }
ingo@42: 
ingo@42: 
ingo@42:     /**
ingo@42:      * Returns the end value.
ingo@42:      *
ingo@42:      * @return the end value.
ingo@42:      */
ingo@42:     public double getTo() {
ingo@42:         String v = getValueAsString(FIELD_TO);
ingo@42: 
ingo@42:         return getDouble(v);
ingo@42:     }
ingo@42: 
ingo@42: 
ingo@42:     /**
ingo@42:      * Returns the step width.
ingo@42:      *
ingo@42:      * @return the step width.
ingo@42:      */
ingo@42:     public double getStep() {
ingo@42:         String v = getValueAsString(FIELD_WIDTH);
ingo@42: 
ingo@42:         return getDouble(v);
ingo@42:     }
ingo@42: }
ingo@42: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :