ingo@41: package de.intevation.flys.client.client.ui;
ingo@41: 
ingo@43: import java.util.LinkedHashMap;
ingo@53: import java.util.List;
ingo@41: 
ingo@41: import com.google.gwt.core.client.GWT;
ingo@41: 
ingo@41: import com.smartgwt.client.widgets.Canvas;
ingo@41: import com.smartgwt.client.widgets.Label;
ingo@41: import com.smartgwt.client.widgets.form.DynamicForm;
ingo@41: import com.smartgwt.client.widgets.form.fields.events.BlurHandler;
ingo@41: import com.smartgwt.client.widgets.form.fields.events.BlurEvent;
ingo@41: import com.smartgwt.client.widgets.form.fields.events.ChangeHandler;
ingo@41: import com.smartgwt.client.widgets.form.fields.events.ChangeEvent;
ingo@41: import com.smartgwt.client.widgets.form.fields.FormItem;
ingo@41: import com.smartgwt.client.widgets.form.fields.RadioGroupItem;
ingo@41: import com.smartgwt.client.widgets.layout.HLayout;
ingo@41: import com.smartgwt.client.widgets.layout.VLayout;
ingo@41: 
ingo@41: import de.intevation.flys.client.shared.model.Data;
ingo@46: import de.intevation.flys.client.shared.model.DataItem;
ingo@51: import de.intevation.flys.client.shared.model.DataList;
ingo@46: import de.intevation.flys.client.shared.model.DefaultData;
ingo@46: import de.intevation.flys.client.shared.model.DefaultDataItem;
ingo@41: import de.intevation.flys.client.client.FLYSMessages;
ingo@41: 
ingo@41: 
ingo@41: /**
ingo@41:  * This UIProvider creates a widget to enter locations or a distance.
ingo@41:  *
ingo@41:  * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
ingo@41:  */
ingo@41: public class LocationDistancePanel
ingo@41: extends      AbstractUIProvider
ingo@41: implements   ChangeHandler, BlurHandler
ingo@41: {
ingo@41:     /** The message class that provides i18n strings.*/
ingo@41:     protected FLYSMessages MESSAGES = GWT.create(FLYSMessages.class);
ingo@41: 
ingo@41: 
ingo@41:     /** The constant name of the input field to enter locations.*/
ingo@41:     public static final String FIELD_LOCATION = "location";
ingo@41: 
ingo@43:     /** The constant name of the input field to enter distance.*/
ingo@43:     public static final String FIELD_DISTANCE = "distance";
ingo@43: 
ingo@41:     /** The constant name of the input field to enter the start of a distance.*/
ingo@41:     public static final String FIELD_FROM = "from";
ingo@41: 
ingo@41:     /** The constant name of the input field to enter the end of a distance.*/
ingo@41:     public static final String FIELD_TO = "to";
ingo@41: 
ingo@41:     /** The constant name of the input field to enter the step width of a
ingo@41:      * distance.*/
ingo@41:     public static final String FIELD_WIDTH = "width";
ingo@41: 
ingo@53:     public static final int WIDTH = 250;
ingo@53: 
ingo@41: 
ingo@41:     /** The radio group for input mode selection.*/
ingo@43:     protected DynamicForm mode;
ingo@41: 
ingo@41:     /** A container that will contain the location or the distance panel.*/
ingo@41:     protected HLayout container;
ingo@41: 
ingo@55:     /** The min value for a distance.*/
ingo@55:     protected double min;
ingo@55: 
ingo@55:     /** The max value for a distance.*/
ingo@55:     protected double max;
ingo@55: 
ingo@43:     /** The 'from' value entered in the distance mode.*/
ingo@43:     protected double from;
ingo@43: 
ingo@43:     /** The 'to' value entered in the distance mode.*/
ingo@43:     protected double to;
ingo@43: 
ingo@43:     /** The 'step' value entered in the distance mode.*/
ingo@43:     protected double step;
ingo@43: 
ingo@43:     /** The values entered in the location mode.*/
ingo@43:     protected double[] values;
ingo@43: 
ingo@41: 
ingo@41:     /**
ingo@41:      * Creates a new LocationDistancePanel instance.
ingo@41:      */
ingo@41:     public LocationDistancePanel() {
ingo@41:     }
ingo@41: 
ingo@41: 
ingo@41:     /**
ingo@41:      * This method creates a widget that contains a label, a panel with
ingo@41:      * checkboxes to switch the input mode between location and distance input,
ingo@41:      * and a the mode specific panel.
ingo@41:      *
ingo@41:      * @param data The data that might be inserted.
ingo@41:      *
ingo@41:      * @return a panel.
ingo@41:      */
ingo@51:     public Canvas create(DataList data) {
ingo@41:         VLayout layout = new VLayout();
ingo@41: 
ingo@55:         initDefaults(data);
ingo@55: 
ingo@57:         Label label   = new Label(MESSAGES.location_distance_state());
ingo@57:         Canvas widget = createWidget(data);
ingo@57:         Canvas submit = getNextButton();
ingo@41: 
ingo@41:         label.setHeight(25);
ingo@41: 
ingo@41:         layout.addMember(label);
ingo@45:         layout.addMember(widget);
ingo@45:         layout.addMember(submit);
ingo@45: 
ingo@45:         return layout;
ingo@45:     }
ingo@45: 
ingo@45: 
ingo@53:     public Canvas createOld(DataList dataList) {
ingo@53:         List<Data> items = dataList.getAll();
ingo@53: 
ingo@53:         Data dFrom = getData(items, "ld_from");
ingo@53:         Data dTo   = getData(items, "ld_to");
ingo@53:         Data dStep = getData(items, "ld_step");
ingo@53: 
ingo@53:         DataItem[] from = dFrom.getItems();
ingo@53:         DataItem[] to   = dTo.getItems();
ingo@53:         DataItem[] step = dStep.getItems();
ingo@53: 
ingo@53:         HLayout layout = new HLayout();
ingo@53:         Label   label  = new Label(dataList.getLabel());
ingo@53: 
ingo@53:         label.setWidth("50%");
ingo@53: 
ingo@53:         StringBuilder sb = new StringBuilder();
ingo@53:         sb.append(from[0].getLabel());
ingo@53:         sb.append(" " + MESSAGES.unitFrom() + " ");
ingo@53:         sb.append(to[0].getLabel());
ingo@53:         sb.append(" " + MESSAGES.unitTo() + " ");
ingo@53:         sb.append(step[0].getLabel());
ingo@53:         sb.append(" " + MESSAGES.unitWidth());
ingo@53: 
ingo@58:         Canvas back = getBackButton(dataList.getState());
ingo@58: 
ingo@53:         layout.addMember(label);
ingo@53:         layout.addMember(new Label(sb.toString()));
ingo@58:         layout.addMember(back);
ingo@53: 
ingo@53:         return layout;
ingo@53:     }
ingo@53: 
ingo@53: 
ingo@53:     /**
ingo@55:      * This method reads the default values defined in the DataItems of the Data
ingo@55:      * objects in <i>list</i>.
ingo@55:      *
ingo@55:      * @param list The DataList container that stores the Data objects.
ingo@55:      */
ingo@55:     protected void initDefaults(DataList list) {
ingo@55:         Data f = getData(list.getAll(), "ld_from");
ingo@55:         Data t = getData(list.getAll(), "ld_to");
ingo@55:         Data s = getData(list.getAll(), "ld_step");
ingo@55: 
ingo@55:         DataItem[] fItems = f.getItems();
ingo@55:         DataItem[] tItems = t.getItems();
ingo@55:         DataItem[] sItems = s.getItems();
ingo@55: 
ingo@55:         min  = Double.valueOf(fItems[0].getStringValue());
ingo@55:         max  = Double.valueOf(tItems[0].getStringValue());
ingo@55:         step = Double.valueOf(sItems[0].getStringValue());
ingo@55: 
ingo@55:         this.from = min;
ingo@55:         this.to   = max;
ingo@55:         this.step = step;
ingo@55:     }
ingo@55: 
ingo@55: 
ingo@55:     /**
ingo@53:      * This method greps the Data with name <i>name</i> from the list and
ingo@53:      * returns it.
ingo@53:      *
ingo@53:      * @param items A list of Data.
ingo@53:      * @param name The name of the Data that we are searching for.
ingo@53:      *
ingo@53:      * @return the Data with the name <i>name</i>.
ingo@53:      */
ingo@53:     protected Data getData(List<Data> data, String name) {
ingo@53:         for (Data d: data) {
ingo@53:             if (name.equals(d.getLabel())) {
ingo@53:                 return d;
ingo@53:             }
ingo@53:         }
ingo@53: 
ingo@53:         return null;
ingo@53:     }
ingo@53: 
ingo@53: 
ingo@51:     protected Canvas createWidget(DataList data) {
ingo@45:         VLayout layout       = new VLayout();
ingo@45:         container            = new HLayout();
ingo@45:         Canvas checkboxPanel = createRadioButtonPanel();
ingo@45: 
ingo@45:         // the initial view will display the location input mode
ingo@45:         Canvas locationPanel = new DoubleArrayPanel(
ingo@45:                 MESSAGES.unitLocation(),
ingo@45:                 getLocationValues(),
ingo@45:                 this);
ingo@45:         container.addMember(locationPanel);
ingo@45: 
ingo@41:         layout.addMember(checkboxPanel);
ingo@41:         layout.addMember(container);
ingo@41: 
ingo@41:         // TODO Add a table on the right to select locations by mouse click
ingo@41: 
ingo@41:         return layout;
ingo@41:     }
ingo@41: 
ingo@41: 
ingo@41:     /**
ingo@41:      * This method returns the selected data.
ingo@41:      *
ingo@41:      * @return the selected/inserted data.
ingo@41:      */
ingo@41:     public Data[] getData() {
ingo@46:         return new Data[] { getDataFrom(), getDataTo(), getDataStep() };
ingo@46:     }
ingo@41: 
ingo@46: 
ingo@46:     /**
ingo@46:      * Returns the Data object for the 'from' attribute.
ingo@46:      *
ingo@46:      * @return the Data object for the 'from' attribute.
ingo@46:      */
ingo@46:     protected Data getDataFrom() {
ingo@46:         String value  = Double.valueOf(getFinalFrom()).toString();
ingo@46:         DataItem item = new DefaultDataItem("ld_from", "ld_from", value);
ingo@46:         return new DefaultData(
ingo@51:             "ld_from", null, null, new DataItem[] { item });
ingo@46:     }
ingo@46: 
ingo@46: 
ingo@46:     /**
ingo@46:      * Returns the Data object for the 'to' attribute.
ingo@46:      *
ingo@46:      * @return the Data object for the 'to' attribute.
ingo@46:      */
ingo@46:     protected Data getDataTo() {
ingo@46:         String value  = Double.valueOf(getFinalTo()).toString();
ingo@46:         DataItem item = new DefaultDataItem("ld_to", "ld_to", value);
ingo@46:         return new DefaultData(
ingo@51:             "ld_to", null, null, new DataItem[] { item });
ingo@46:     }
ingo@46: 
ingo@46: 
ingo@46:     /**
ingo@46:      * Returns the Data object for the 'step' attribute.
ingo@46:      *
ingo@46:      * @return the Data object for the 'step' attribute.
ingo@46:      */
ingo@46:     protected Data getDataStep() {
ingo@46:         String value  = Double.valueOf(getFinalStep()).toString();
ingo@46:         DataItem item = new DefaultDataItem("ld_step","ld_step", value);
ingo@46:         return new DefaultData(
ingo@51:             "ld_step", null, null, new DataItem[] { item });
ingo@46:     }
ingo@46: 
ingo@46: 
ingo@46:     /**
ingo@46:      * Returns the value of 'from' depending on the selected input mode.
ingo@46:      *
ingo@46:      * @return the value of 'from' depending on the selected input mode.
ingo@46:      */
ingo@46:     protected double getFinalFrom() {
ingo@46:         if (isLocationMode()) {
ingo@46:             double[] values = getLocationValues();
ingo@46:             double   value  = Double.MAX_VALUE;
ingo@46: 
ingo@46:             for (double v: values) {
ingo@46:                 value = value < v ? value : v;
ingo@46:             }
ingo@46: 
ingo@46:             return value;
ingo@46:         }
ingo@46:         else {
ingo@46:             return getFrom();
ingo@46:         }
ingo@46:     }
ingo@46: 
ingo@46: 
ingo@46:     /**
ingo@46:      * Returns the value of 'to' depending on the selected input mode.
ingo@46:      *
ingo@46:      * @return the value of 'to' depending on the selected input mode.
ingo@46:      */
ingo@46:     protected double getFinalTo() {
ingo@46:         if (isLocationMode()) {
ingo@46:             double[] values = getLocationValues();
ingo@46:             double   value  = Double.MIN_VALUE;
ingo@46: 
ingo@46:             for (double v: values) {
ingo@46:                 value = value > v ? value : v;
ingo@46:             }
ingo@46: 
ingo@46:             return value;
ingo@46:         }
ingo@46:         else {
ingo@46:             return getTo();
ingo@46:         }
ingo@46:     }
ingo@46: 
ingo@46: 
ingo@46:     /**
ingo@46:      * Returns the value of 'step' depending on the selected input mode.
ingo@46:      *
ingo@46:      * @return the value of 'step' depending on the selected input mode.
ingo@46:      */
ingo@46:     protected double getFinalStep() {
ingo@46:         if (isLocationMode()) {
ingo@46:             // we have no field to enter the 'step' attribute in the location
ingo@46:             // mode
ingo@46:             return 0.0;
ingo@46:         }
ingo@46:         else {
ingo@46:             return getStep();
ingo@46:         }
ingo@46:     }
ingo@46: 
ingo@46: 
ingo@46:     /**
ingo@46:      * Determines the current input mode.
ingo@46:      *
ingo@46:      * @return true, if 'location' is the current input mode, otherwise false.
ingo@46:      */
ingo@46:     public boolean isLocationMode() {
ingo@46:         String inputMode = mode.getValueAsString("mode");
ingo@46: 
ingo@46:         return inputMode.equals(FIELD_LOCATION) ? true : false;
ingo@41:     }
ingo@41: 
ingo@41: 
ingo@41:     /**
ingo@41:      * This method switches the input mode between location and distance input.
ingo@41:      *
ingo@41:      * @param event The click event fired by a RadioButtonGroupItem.
ingo@41:      */
ingo@41:     public void onChange(ChangeEvent event) {
ingo@41:         String value = (String) event.getValue();
ingo@41: 
ingo@41:         if (value == null) {
ingo@41:             return;
ingo@41:         }
ingo@41: 
ingo@43:         if (value.equals(FIELD_LOCATION)) {
ingo@43:             Canvas locationPanel = new DoubleArrayPanel(
ingo@43:                 MESSAGES.unitLocation(),
ingo@43:                 getLocationValues(),
ingo@43:                 this);
ingo@43: 
ingo@41:             container.removeMembers(container.getMembers());
ingo@41:             container.addMember(locationPanel);
ingo@41:         }
ingo@43:         else {
ingo@43:             Canvas distancePanel = new DoubleRangePanel(
ingo@43:                 MESSAGES.unitFrom(), MESSAGES.unitTo(), MESSAGES.unitWidth(),
ingo@43:                 getFrom(), getTo(), getStep(),
ingo@43:                 250,
ingo@43:                 this);
ingo@43: 
ingo@41:             container.removeMembers(container.getMembers());
ingo@41:             container.addMember(distancePanel);
ingo@41:         }
ingo@41:     }
ingo@41: 
ingo@41: 
ingo@41:     /**
ingo@41:      * This method is used to validate the inserted data in the form fields.
ingo@41:      *
ingo@41:      * @param event The BlurEvent that gives information about the FormItem that
ingo@41:      * has been modified and its value.
ingo@41:      */
ingo@41:     public void onBlur(BlurEvent event) {
ingo@41:         FormItem item = event.getItem();
ingo@41:         String  field = item.getFieldName();
ingo@41: 
ingo@41:         if (field == null) {
ingo@41:             return;
ingo@41:         }
ingo@41: 
ingo@43:         if (field.equals(DoubleArrayPanel.FIELD_NAME)) {
ingo@43:             DoubleArrayPanel p = (DoubleArrayPanel) event.getForm();
ingo@41: 
ingo@43:             if (p.validateForm(item)) {
ingo@43:                 setLocationValues(p.getInputValues(item));
ingo@41:             }
ingo@41:         }
ingo@43:         else {
ingo@43:             DoubleRangePanel p = (DoubleRangePanel) event.getForm();
ingo@41: 
ingo@43:             if (p.validateForm(item)) {
ingo@43:                 setFrom(p.getFrom());
ingo@43:                 setTo(p.getTo());
ingo@43:                 setStep(p.getStep());
ingo@43:             }
ingo@41:         }
ingo@41:     }
ingo@41: 
ingo@41: 
ingo@41:     /**
ingo@41:      * This method creates the panel that contains the checkboxes to switch
ingo@41:      * between the input mode 'location' and 'distance'.
ingo@41:      *
ingo@41:      * @return the checkbox panel.
ingo@41:      */
ingo@41:     protected Canvas createRadioButtonPanel() {
ingo@43:         mode = new DynamicForm();
ingo@41: 
ingo@43:         RadioGroupItem radio = new RadioGroupItem("mode");
ingo@41:         radio.setShowTitle(false);
ingo@41:         radio.setVertical(false);
ingo@41: 
ingo@43:         LinkedHashMap values = new LinkedHashMap();
ingo@43:         values.put(FIELD_LOCATION, MESSAGES.location());
ingo@43:         values.put(FIELD_DISTANCE, MESSAGES.distance());
ingo@43: 
ingo@45:         LinkedHashMap initial = new LinkedHashMap();
ingo@45:         initial.put("mode", FIELD_LOCATION);
ingo@45: 
ingo@43:         radio.setValueMap(values);
ingo@41:         radio.addChangeHandler(this);
ingo@41: 
ingo@43:         mode.setFields(radio);
ingo@45:         mode.setValues(initial);
ingo@41: 
ingo@43:         return mode;
ingo@41:     }
ingo@41: 
ingo@41: 
ingo@43:     protected double getFrom() {
ingo@43:         return from;
ingo@41:     }
ingo@41: 
ingo@41: 
ingo@43:     protected void setFrom(double from) {
ingo@43:         this.from = from;
ingo@43:     }
ingo@41: 
ingo@41: 
ingo@43:     protected double getTo() {
ingo@43:         return to;
ingo@43:     }
ingo@41: 
ingo@41: 
ingo@43:     protected void setTo(double to) {
ingo@43:         this.to = to;
ingo@43:     }
ingo@41: 
ingo@43: 
ingo@43:     protected double getStep() {
ingo@43:         return step;
ingo@43:     }
ingo@43: 
ingo@43: 
ingo@43:     protected void setStep(double step) {
ingo@43:         this.step = step;
ingo@43:     }
ingo@43: 
ingo@43: 
ingo@43:     protected double[] getLocationValues() {
ingo@43:         return values;
ingo@43:     }
ingo@43: 
ingo@43: 
ingo@43:     protected void setLocationValues(double[] values) {
ingo@43:         this.values = values;
ingo@41:     }
ingo@41: }
ingo@41: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :