teichmann@5835: package org.dive4elements.river.client.client.widgets;
christian@3717: 
christian@3717: import com.google.gwt.core.client.GWT;
christian@3717: import com.google.gwt.i18n.client.NumberFormat;
christian@3852: 
christian@3717: import com.smartgwt.client.data.Record;
christian@3717: import com.smartgwt.client.widgets.Button;
christian@3717: import com.smartgwt.client.widgets.Label;
christian@3717: import com.smartgwt.client.widgets.events.ClickEvent;
christian@3717: import com.smartgwt.client.widgets.form.DynamicForm;
christian@3717: import com.smartgwt.client.widgets.form.FormItemValueFormatter;
christian@3717: import com.smartgwt.client.widgets.form.FormItemValueParser;
christian@3717: import com.smartgwt.client.widgets.form.fields.FormItem;
christian@3717: import com.smartgwt.client.widgets.form.fields.TextItem;
christian@3717: import com.smartgwt.client.widgets.form.fields.events.BlurEvent;
christian@3717: import com.smartgwt.client.widgets.form.fields.events.BlurHandler;
christian@3717: import com.smartgwt.client.widgets.form.fields.events.KeyPressEvent;
christian@3717: import com.smartgwt.client.widgets.form.fields.events.KeyPressHandler;
christian@3717: import com.smartgwt.client.widgets.layout.HLayout;
christian@3717: 
teichmann@5835: import org.dive4elements.river.client.shared.model.FacetRecord;
christian@3717: 
christian@3717: import java.util.ArrayList;
christian@3717: import java.util.List;
christian@3717: 
christian@3717: /**
christian@3717:  * SpinnerItem-like element with text label and up/down buttons.
christian@3717:  */
christian@3717: public class KMSpinner extends HLayout {
christian@3717:     protected List<KMSpinnerChangeListener> listeners = new ArrayList<KMSpinnerChangeListener>();
christian@3717: 
christian@3717:     protected Label label;
christian@3717:     protected FacetRecord facetRecord;
christian@3717:     protected double value;
christian@3717: 
christian@3717:     public KMSpinner(double initialValue, FacetRecord facetRecord) {
christian@3717:         super(2);
christian@3717:         this.facetRecord = facetRecord;
christian@3717:         this.value = initialValue;
christian@3717: 
christian@3717:         setWidth("99%");
christian@3852:         setHeight(18);
christian@3717: 
christian@3717:         // minusButton shall ask service for previous available cs.
christian@3717:         Button minusButton = new Button("-");
christian@3717:         minusButton.setWidth(18);
christian@3717:         minusButton.setHeight(18);
christian@3717:         minusButton.addClickHandler(new com.smartgwt.client.widgets.events.ClickHandler() {
christian@3717:             public void onClick(ClickEvent evt) {
christian@3717:                 fireChangedEvent(value - 0.1d, false);
christian@3717:             }
christian@3717:         });
christian@3717: 
christian@3717:         DynamicForm form = new DynamicForm();
christian@3717:         final TextItem kmField = new TextItem();
christian@3717:         kmField.setValue(initialValue);
christian@3717:         kmField.setWidth("*");
christian@3717:         kmField.setTitle("");
christian@3717:         kmField.setHeight(16);
christian@3717: 
christian@3717:         FormItemValueFormatter doubleFormat = new FormItemValueFormatter() {
christian@3717:             public String formatValue(Object value, Record record, DynamicForm form, FormItem item) {
christian@3717:                 if (value != null) {
christian@3717:                     NumberFormat nf = NumberFormat.getDecimalFormat();
christian@3717:                     try {
christian@3717:                         double d = Double.valueOf(value.toString()).doubleValue();
christian@3717:                         return nf.format(d);
christian@3717:                     }
christian@3717:                     catch (Exception e) {
christian@3852:                         GWT.log("EditorValueFormatter exception: " + e.toString());
christian@3852: 
christian@3852:                         // Remove junk chars from input string
christian@3852:                         return doublefyString(value.toString());
christian@3717:                     }
christian@3717:                 }
christian@3717:                 else {
christian@3717:                     return null;
christian@3717:                 }
christian@3717:             }
christian@3717:         };
christian@3717:         kmField.setEditorValueFormatter(doubleFormat);
christian@3717: 
christian@3717:         FormItemValueParser doubleParser = new FormItemValueParser() {
christian@3717:             public Object parseValue(String value, DynamicForm form, FormItem item) {
christian@3717:                 if (value == null)
christian@3717:                     return null;
christian@3717:                 try {
christian@3717:                     NumberFormat nf = NumberFormat.getDecimalFormat();
christian@3717:                     double d = nf.parse(value.toString());
christian@3717:                     return Double.toString(d);
christian@3717:                 }
christian@3717:                 catch(NumberFormatException nfe) {
christian@3717:                     return value;
christian@3717:                 }
christian@3717:             }
christian@3717:         };
christian@3717:         kmField.setEditorValueParser(doubleParser);
christian@3717: 
christian@3717:         // Update on focus lost and enter-pressed.
christian@3717:         kmField.addBlurHandler(new BlurHandler() {
christian@3717:             @Override
christian@3717:             public void onBlur(BlurEvent be) {
christian@3717:                 if (kmField.getValue() != null) {
christian@3717:                     try {
christian@3717:                         fireChangedEvent(Double.parseDouble(kmField.getValue().toString()), true);
christian@3717:                     }
christian@3717:                     catch(NumberFormatException nfe) {
christian@3717:                         GWT.log("entered string cannot be parsed to double.");
christian@3717:                     }
christian@3717:                 }
christian@3717:             }
christian@3717:         });
christian@3717:         kmField.addKeyPressHandler(new KeyPressHandler() {
christian@3717:             @Override
christian@3717:             public void onKeyPress(KeyPressEvent kpe) {
christian@3717:                 if (kpe.getKeyName().equals("Enter")) {
christian@3717:                     kmField.blurItem();
christian@3717:                 }
christian@3717:             }
christian@3717:         });
christian@3717: 
christian@3717:         // TODO: i18n Now add all the validators, formatters, editors/parsers  etc.
christian@3717:         form.setFields(kmField);
christian@3717:         form.setTitle("");
christian@3717:         form.setTitlePrefix("");
christian@3717:         form.setTitleSuffix("");
christian@3717:         form.setTitleWidth(0);
christian@3717:         form.setWidth(50);
christian@3717:         form.setHeight(18);
christian@3717: 
christian@3717:         // PlusButton shall ask service for next available cs.
christian@3717:         Button plusButton = new Button("+");
christian@3717:         plusButton.setWidth(18);
christian@3717:         plusButton.setHeight(18);
christian@3717:         plusButton.addClickHandler(new com.smartgwt.client.widgets.events.ClickHandler() {
christian@3717:             public void onClick(ClickEvent evt) {
christian@3717:                 fireChangedEvent(value + 0.1d, true);
christian@3717:             }
christian@3717:         });
christian@3717: 
christian@3717:         this.addMember(minusButton);
christian@3717:         this.addMember(form);
christian@3717:         this.addMember(plusButton);
christian@3717:     }
christian@3717: 
christian@3717:     public void addChangeListener(KMSpinnerChangeListener listener) {
christian@3717:         this.listeners.add(listener);
christian@3717:     }
christian@3717: 
christian@3717:     protected void fireChangedEvent(double val, boolean up) {
christian@3717:         for(KMSpinnerChangeListener listener : listeners) {
christian@3717:             listener.spinnerValueEntered(this, val, facetRecord, up);
christian@3717:         }
christian@3717:     }
christian@3852: 
christian@3852:     /**
christian@3852:      * Remove junk chars from double string.
christian@3852:      * This method should work for most locales, but not for
christian@3852:      * exotic ones that do not use "." or "," as decimal
christian@3852:      * separator.
christian@3852:      * @return
christian@3852:      */
christian@3852:     protected String doublefyString(String str) {
christian@3852:         StringBuilder buf = new StringBuilder(str.length());
christian@3852: 
christian@3852:         for (int n = 0; n < str.length(); n++) {
christian@3852:             char c = str.charAt(n);
christian@3852:             if ((c >= '0' && c <= '9') || c == '.' || c == ',') {
christian@3852:                 buf.append(c);
christian@3852:             }
christian@3852:         }
christian@3852: 
christian@3852:         return buf.toString();
christian@3852:     }
christian@3717: }
christian@3717: