gitorious.org Git - online-glom:gwt-glom.git/blob - src/main/java/org/glom/web/client/ui/cell/NumericCell.java

1 /*

3 *

4 * This file is part of GWT-Glom.

5 *

6 * GWT-Glom is free software: you can redistribute it and/or modify it

7 * under the terms of the GNU Lesser General Public License as published by the

8 * Free Software Foundation, either version 3 of the License, or (at your

9 * option) any later version.

10 *

11 * GWT-Glom is distributed in the hope that it will be useful, but WITHOUT

12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License

14 * for more details.

15 *

16 * You should have received a copy of the GNU Lesser General Public License

17 * along with GWT-Glom. If not, see <http://www.gnu.org/licenses/>.

18 */

19

20 package org.glom.web.client.ui.cell;

21

22 import org.glom.web.shared.layout.LayoutItemField.GlomFieldType;

23

24 import com.google.gwt.cell.client.AbstractCell;

25 import com.google.gwt.i18n.client.NumberFormat;

26 import com.google.gwt.safehtml.shared.SafeHtml;

27 import com.google.gwt.safehtml.shared.SafeHtmlBuilder;

28 import com.google.gwt.safehtml.shared.SafeHtmlUtils;

29

30 /**

31 * Cell renderer for {@link GlomFieldType} TYPE_NUMERIC.

32 *

33 * @author Ben Konrath <ben@bagu.org>

34 *

35 */

36 public class NumericCell extends AbstractCell<Double> {

37 private SafeHtml colourCSSProp;

38 private SafeHtml backgroundColourCSSProp;

39 private NumberFormat numberFormat;

40 private boolean useAltColourForNegatives;

41 private String currencyCode;

42

43 // TODO Find a way to set the colours on the whole column

44 public NumericCell(String foregroundColour, String backgroundColour, NumberFormat numberFormat,

45 boolean useAltColourForNegatives, String currencyCode) {

46 if (foregroundColour != null && !foregroundColour.isEmpty()) {

47 colourCSSProp = SafeHtmlUtils.fromString("color:" + foregroundColour + ";");

48 } else {

49 colourCSSProp = SafeHtmlUtils.fromSafeConstant("");

50 }

51 if (backgroundColour != null && !backgroundColour.isEmpty()) {

52 backgroundColourCSSProp = SafeHtmlUtils.fromString("background-color:" + backgroundColour + ";");

53 } else {

54 backgroundColourCSSProp = SafeHtmlUtils.fromSafeConstant("");

55 }

56 this.numberFormat = numberFormat;

57 this.useAltColourForNegatives = useAltColourForNegatives;

58 this.currencyCode = currencyCode.isEmpty() ? "" : currencyCode + " ";

59 }

60

61 /*

62 * (non-Javadoc)

63 *

64 * @see com.google.gwt.cell.client.AbstractCell#render(com.google.gwt.cell.client.Cell.Context, java.lang.Object,

65 * com.google.gwt.safehtml.shared.SafeHtmlBuilder)

66 */

67 @Override

68 public void render(Context context, Double value, SafeHtmlBuilder sb) {

69 if (value == null) {

70 // The value is from an empty row.

71 sb.appendHtmlConstant(" ");

72 return;

73 }

74

75 // set the foreground colour to red if the number is negative and this is requested

76 if (useAltColourForNegatives && value.doubleValue() < 0) {

77 // The default alternative colour in libglom is red.

78 colourCSSProp = SafeHtmlUtils.fromString("color: #FF0000;");

79 }

80

81 // Convert the number to a string and set some CSS properties on the text.

82 // The overflow and text-overflow properties tell the browser to add an ellipsis when the text overflows the

83 // table cell.

84 // FIXME this isn't using safe html correctly!

85 sb.appendHtmlConstant("<div style=\"overflow: hidden; text-overflow: ellipsis; " + colourCSSProp.asString()

86 + backgroundColourCSSProp.asString() + "\">");

87 sb.append(SafeHtmlUtils.fromString(currencyCode + numberFormat.format(value)));

88 sb.appendHtmlConstant("</div>");

89

90 }

91 }