litesoft
@ 965
litesoft / trunk / GWT_Sandbox / FormEngine / src / com / temp / foundation / client / widget / table / cell / TextDataCell.java
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package com.temp.foundation.client.widget.table.cell; import com.google.gwt.cell.client.*; import com.google.gwt.dom.client.*; import com.google.gwt.event.dom.client.*; import com.google.gwt.safehtml.shared.*; import com.google.gwt.user.client.ui.*; import com.temp.foundation.client.handler.*; import com.temp.common.shared.utils.*; public class TextDataCell<E> extends AbstractCell<E> { // full text popup variables private static final String LINK_STYLE = "link-button"; private static final String POPUP_STYLE = "HoverFullTextPopup"; private static final int POPUP_PADDING_LEFT_PX = 8; private static final int POPUP_PADDING_TOP_PX = 6; private static final int POPUP_BORDER_WIDTH_PX = 1; private static final int CELL_PADDING_PX = 4; private static final String MOUSEOVER_EVENT = "mouseover"; private static final String CLICK_EVENT = "click"; private DataIsClickableHandler<E> isClickableHandler; private DisplayStringHandler<E> displayStringHandler; private DataClickHandler<E> clickHandler; private Label fullTextLabel = new Label(); private E cellValue; private DecoratedPopupPanel popup = new DecoratedPopupPanel( true ); public TextDataCell() { this( null, null, null ); } public TextDataCell( DisplayStringHandler<E> displayStringHandler ) { this( displayStringHandler, null, null ); } public TextDataCell( DisplayStringHandler<E> displayStringHandler, DataClickHandler<E> clickHandler ) { this( displayStringHandler, clickHandler, null ); } public TextDataCell( DisplayStringHandler<E> displayStringHandler, DataClickHandler<E> clickHandler, DataIsClickableHandler<E> isClickableHandler ) { super( MOUSEOVER_EVENT, CLICK_EVENT ); setDataDisplayStringHandler( displayStringHandler ); setDataClickHandler( clickHandler ); setDataIsClickableHandler( isClickableHandler ); initializePopup(); } private void setCellValue( E value ) { this.cellValue = value; } private E getCellValue() { return cellValue; } private void setDataDisplayStringHandler( DisplayStringHandler<E> displayStringHandler ) { if ( displayStringHandler == null ) { displayStringHandler = new DisplayStringHandler<E>() { public String getDisplayString( E value ) { if ( value != null ) { return value.toString(); } return ""; } }; } this.displayStringHandler = displayStringHandler; } private void setDataClickHandler( DataClickHandler<E> clickHandler ) { this.clickHandler = clickHandler; } private void setDataIsClickableHandler( DataIsClickableHandler<E> isClickableHandler ) { if ( isClickableHandler == null ) { isClickableHandler = new DataIsClickableHandler<E>() { public boolean isClickable( E elem ) { return true; } }; } this.isClickableHandler = isClickableHandler; } private void initializePopup() { popup.setGlassEnabled( false ); popup.setWidget( fullTextLabel ); popup.setStyleName( POPUP_STYLE ); popup.hide(); popup.addDomHandler( new MouseOutHandler() { public void onMouseOut( MouseOutEvent event ) { popup.hide(); } }, MouseOutEvent.getType() ); popup.addDomHandler( new ClickHandler() { public void onClick( ClickEvent event ) { if ( clickHandler != null ) { E value = getCellValue(); if ( value != null ) { clickHandler.onClick( value ); } } } }, ClickEvent.getType() ); } protected void showFullTextPopup( Element wrapper, E value ) { // check if some of the text is being hidden. if ( isClickable( value ) ) { setCellValue( value ); fullTextLabel.setStyleName( LINK_STYLE ); } else { fullTextLabel.removeStyleName( LINK_STYLE ); setCellValue( null ); } fullTextLabel.setText( displayStringHandler.getDisplayString( value ) ); int left = wrapper.getAbsoluteLeft() - (POPUP_PADDING_LEFT_PX + POPUP_BORDER_WIDTH_PX); int top = wrapper.getAbsoluteTop() - (POPUP_PADDING_TOP_PX + POPUP_BORDER_WIDTH_PX); popup.setPopupPosition( left, top ); popup.show(); } private boolean isClickable( E value ) { return clickHandler != null && isClickableHandler.isClickable( value ); } @Override public void render( com.google.gwt.cell.client.Cell.Context context, E value, SafeHtmlBuilder sb ) { if ( isClickable( value ) ) { sb.appendHtmlConstant( "<span class='" + LINK_STYLE + "'>" ); } else { sb.appendHtmlConstant( "<span>" ); } sb.appendEscaped( displayStringHandler.getDisplayString( value ) ); sb.appendHtmlConstant( "</span>" ); } @Override public void onBrowserEvent( Context context, Element parent, E value, NativeEvent event, ValueUpdater<E> valueUpdater ) { String eventType = event.getType(); if ( value != null && getConsumedEvents().contains( eventType ) ) { EventTarget eventTarget = event.getEventTarget(); if ( Element.is( eventTarget ) ) { Element target = eventTarget.cast(); Element container = parent; Element wrapper = container.getFirstChildElement(); while ( wrapper != null ) { if ( wrapper.isOrHasChild( target ) ) { if ( eventType.equals( MOUSEOVER_EVENT ) ) { // on hover full text int containerWidth = container.getAbsoluteRight() - container.getAbsoluteLeft() + CELL_PADDING_PX; int textWidth = wrapper.getAbsoluteRight() - wrapper.getAbsoluteLeft(); if ( containerWidth < textWidth ) { showFullTextPopup( wrapper, value ); } break; } else if ( eventType.equals( CLICK_EVENT ) ) { // click if ( isClickable( value ) ) { clickHandler.onClick( value ); } break; } } wrapper = wrapper.getNextSiblingElement(); } } } } } |
Commits for litesoft/trunk/GWT_Sandbox/FormEngine/src/com/temp/foundation/client/widget/table/cell/TextDataCell.java
Revision | Author | Commited | Message |
---|---|---|---|
965 | GeorgeS | Fri 01 Aug, 2014 03:20:35 +0000 | ! |