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242 changes: 242 additions & 0 deletions
242
...a/com/databasepreservation/common/client/common/lists/cells/DatePickerAllowsNullCell.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,242 @@ | ||
| package com.databasepreservation.common.client.common.lists.cells; | ||
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| import static com.google.gwt.dom.client.BrowserEvents.CLICK; | ||
| import static com.google.gwt.dom.client.BrowserEvents.KEYDOWN; | ||
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| import java.util.Date; | ||
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| import com.google.gwt.cell.client.AbstractEditableCell; | ||
| import com.google.gwt.cell.client.ValueUpdater; | ||
| import com.google.gwt.dom.client.Element; | ||
| import com.google.gwt.dom.client.NativeEvent; | ||
| import com.google.gwt.dom.client.SpanElement; | ||
| import com.google.gwt.event.logical.shared.CloseEvent; | ||
| import com.google.gwt.event.logical.shared.CloseHandler; | ||
| import com.google.gwt.event.logical.shared.ValueChangeEvent; | ||
| import com.google.gwt.event.logical.shared.ValueChangeHandler; | ||
| import com.google.gwt.i18n.client.DateTimeFormat; | ||
| import com.google.gwt.safehtml.shared.SafeHtmlBuilder; | ||
| import com.google.gwt.safehtml.shared.SafeHtmlUtils; | ||
| import com.google.gwt.text.shared.SafeHtmlRenderer; | ||
| import com.google.gwt.text.shared.SimpleSafeHtmlRenderer; | ||
| import com.google.gwt.user.client.Event; | ||
| import com.google.gwt.user.client.ui.Button; | ||
| import com.google.gwt.user.client.ui.PopupPanel; | ||
| import com.google.gwt.user.datepicker.client.DatePicker; | ||
|
|
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| /** | ||
| * @author Alexandre Flores <aflores@keep.pt> | ||
| */ | ||
| public class DatePickerAllowsNullCell extends AbstractEditableCell<Date, Date> { | ||
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| private static final int ESCAPE = 27; | ||
| private static final String open_text_span = "<span class=\"DatePickerAllowsNullCell_text\">"; | ||
| private static final String close_text_span = "</span>"; | ||
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| private final DatePicker datePicker; | ||
| private final DateTimeFormat format; | ||
| private int offsetX = 10; | ||
| private int offsetY = 10; | ||
| private Object lastKey; | ||
| private Element lastParent; | ||
| private int lastIndex; | ||
| private int lastColumn; | ||
| private Date lastValue; | ||
| private PopupPanel panel; | ||
| private final SafeHtmlRenderer<String> renderer; | ||
| private ValueUpdater<Date> valueUpdater; | ||
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| /** | ||
| * Constructs a new DatePickerCell that uses the date/time format given by | ||
| * {@link DateTimeFormat#getFullDateFormat}. | ||
| */ | ||
| @SuppressWarnings("deprecation") | ||
| public DatePickerAllowsNullCell() { | ||
| this(DateTimeFormat.getFullDateFormat(), SimpleSafeHtmlRenderer.getInstance()); | ||
| } | ||
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|
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| /** | ||
| * Constructs a new DatePickerCell that uses the given date/time format and a | ||
| * {@link SimpleSafeHtmlRenderer}. | ||
| * | ||
| * @param format | ||
| * a {@link DateTimeFormat} instance | ||
| */ | ||
| public DatePickerAllowsNullCell(DateTimeFormat format) { | ||
| this(format, SimpleSafeHtmlRenderer.getInstance()); | ||
| } | ||
|
|
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| /** | ||
| * Constructs a new DatePickerCell that uses the date/time format given by | ||
| * {@link DateTimeFormat#getFullDateFormat} and the given | ||
| * {@link SafeHtmlRenderer}. | ||
| * | ||
| * @param renderer | ||
| * a {@link SafeHtmlRenderer SafeHtmlRenderer<String>} instance | ||
| */ | ||
| public DatePickerAllowsNullCell(SafeHtmlRenderer<String> renderer) { | ||
| this(DateTimeFormat.getFormat(DateTimeFormat.PredefinedFormat.DATE_FULL), renderer); | ||
| } | ||
|
|
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| /** | ||
| * Constructs a new DatePickerCell that uses the given date/time format and | ||
| * {@link SafeHtmlRenderer}. | ||
| * | ||
| * @param format | ||
| * a {@link DateTimeFormat} instance | ||
| * @param renderer | ||
| * a {@link SafeHtmlRenderer SafeHtmlRenderer<String>} instance | ||
| */ | ||
| public DatePickerAllowsNullCell(DateTimeFormat format, SafeHtmlRenderer<String> renderer) { | ||
| super(CLICK, KEYDOWN); | ||
| if (format == null) { | ||
| throw new IllegalArgumentException("format == null"); | ||
| } | ||
| if (renderer == null) { | ||
| throw new IllegalArgumentException("renderer == null"); | ||
| } | ||
| this.format = format; | ||
| this.renderer = renderer; | ||
|
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| this.datePicker = new DatePicker(); | ||
| this.panel = new PopupPanel(true, true) { | ||
| @Override | ||
| protected void onPreviewNativeEvent(Event.NativePreviewEvent event) { | ||
| if (Event.ONKEYUP == event.getTypeInt()) { | ||
| if (event.getNativeEvent().getKeyCode() == ESCAPE) { | ||
| // Dismiss when escape is pressed | ||
| panel.hide(); | ||
| } | ||
| } | ||
| } | ||
| }; | ||
| panel.addCloseHandler(new CloseHandler<PopupPanel>() { | ||
| public void onClose(CloseEvent<PopupPanel> event) { | ||
| lastKey = null; | ||
| lastValue = null; | ||
| lastIndex = -1; | ||
| lastColumn = -1; | ||
| if (lastParent != null && !event.isAutoClosed()) { | ||
| // Refocus on the containing cell after the user selects a value, but | ||
| // not if the popup is auto closed. | ||
| lastParent.focus(); | ||
| } | ||
| lastParent = null; | ||
| } | ||
| }); | ||
| panel.add(datePicker); | ||
|
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| // Hide the panel and call valueUpdater.update when a date is selected | ||
| datePicker.addValueChangeHandler(new ValueChangeHandler<Date>() { | ||
| public void onValueChange(ValueChangeEvent<Date> event) { | ||
| // Remember the values before hiding the popup. | ||
| Element cellParent = lastParent; | ||
| Date oldValue = lastValue; | ||
| Object key = lastKey; | ||
| int index = lastIndex; | ||
| int column = lastColumn; | ||
| panel.hide(); | ||
|
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| // Update the cell and value updater. | ||
| Date date = event.getValue(); | ||
| setViewData(key, date); | ||
| setValue(new Context(index, column, key), cellParent, oldValue); | ||
| if (valueUpdater != null) { | ||
| valueUpdater.update(date); | ||
| } | ||
| } | ||
| }); | ||
| } | ||
|
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| /** | ||
| * Returns the underlying {@link DatePicker} widget used by this cell. | ||
| */ | ||
| public DatePicker getDatePicker() { | ||
| return datePicker; | ||
| } | ||
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| @Override | ||
| public boolean isEditing(Context context, Element parent, Date value) { | ||
| return lastKey != null && lastKey.equals(context.getKey()); | ||
| } | ||
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| @Override | ||
| public void onBrowserEvent(Context context, Element parent, Date value, NativeEvent event, | ||
| ValueUpdater<Date> valueUpdater) { | ||
| super.onBrowserEvent(context, parent, value, event, valueUpdater); | ||
| if (CLICK.equals(event.getType())) { | ||
| onEnterKeyDown(context, parent, value, event, valueUpdater); | ||
| } | ||
| } | ||
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| @Override | ||
| public void render(Context context, Date value, SafeHtmlBuilder sb) { | ||
| // Get the view data. | ||
| Object key = context.getKey(); | ||
| Date viewData = getViewData(key); | ||
| if (viewData != null && viewData.equals(value)) { | ||
| clearViewData(key); | ||
| viewData = null; | ||
| } | ||
|
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| String s = null; | ||
| if (viewData != null) { | ||
| s = format.format(viewData); | ||
| } else if (value != null) { | ||
| s = format.format(value); | ||
| } | ||
| sb.append(SafeHtmlUtils.fromSafeConstant(open_text_span)); | ||
| if (s != null) { | ||
| sb.append(renderer.render(s)); | ||
| } else { | ||
| sb.append(SafeHtmlUtils.fromSafeConstant("NO DATE")); | ||
| } | ||
| sb.append(SafeHtmlUtils.fromSafeConstant(close_text_span)); | ||
| if (s != null) { | ||
| Button removeButton = new Button("X"); | ||
| removeButton.addStyleName("datePickerAllowsNullCell_remove"); | ||
| removeButton.addClickHandler(event -> { | ||
| // Remember the values before hiding the popup. | ||
| Element cellParent = lastParent; | ||
| Object removeKey = lastKey; | ||
| int index = lastIndex; | ||
| int column = lastColumn; | ||
|
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| // Update the cell and value updater. | ||
| setViewData(removeKey, null); | ||
| setValue(new Context(index, column, removeKey), cellParent, null); | ||
| if (valueUpdater != null) { | ||
| valueUpdater.update(null); | ||
| } | ||
| }); | ||
| } | ||
| } | ||
|
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| @Override | ||
| protected void onEnterKeyDown(Context context, Element parent, Date value, NativeEvent event, | ||
| ValueUpdater<Date> valueUpdater) { | ||
| this.lastKey = context.getKey(); | ||
| this.lastParent = parent; | ||
| this.lastValue = value; | ||
| this.lastIndex = context.getIndex(); | ||
| this.lastColumn = context.getColumn(); | ||
| this.valueUpdater = valueUpdater; | ||
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| Date viewData = getViewData(lastKey); | ||
| Date date = (viewData == null) ? lastValue : viewData; | ||
| if (date == null) { | ||
| date = new Date(); | ||
| } | ||
| datePicker.setCurrentMonth(date); | ||
| datePicker.setValue(date); | ||
| panel.setPopupPositionAndShow(new PopupPanel.PositionCallback() { | ||
| public void setPosition(int offsetWidth, int offsetHeight) { | ||
| panel.setPopupPosition(lastParent.getAbsoluteLeft() + offsetX, lastParent.getAbsoluteTop() + offsetY); | ||
| } | ||
| }); | ||
| } | ||
|
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| public void addStyleNameToPopupPanel(String styleName) { | ||
| this.panel.addStyleName(styleName); | ||
| } | ||
| } |
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