Add HasEnabled to ButtonCell

- allow the button cell to be en-/disabled

Author: Christoph Krautz

src/main/java/com/github/gwtbootstrap/client/ui/ButtonCell.java

@@ -20,21 +20,24 @@
 import com.github.gwtbootstrap.client.ui.resources.ButtonSize;
 import com.google.gwt.safehtml.shared.SafeHtml;
 import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
+import com.google.gwt.user.client.ui.HasEnabled;
 
 /**
  * A ButtonCell with Bootstrap Style, supporting Icons and icon types.
  * 
  * @author Carlos A Becker
+ * @author Christoph Krautz
  * @since 2.0.4.0
  * 
  * @see Button
  * 
  */
-public class ButtonCell extends com.google.gwt.cell.client.ButtonCell {
+public class ButtonCell extends com.google.gwt.cell.client.ButtonCell implements HasEnabled {
 
 	private IconType icon = null;
 	private ButtonType type = null;
 	private ButtonSize size = null;
+	private boolean isEnabled = true;
 
 	public ButtonCell() {
 	}
@@ -82,7 +85,11 @@ public ButtonCell(IconType icon, ButtonType type, ButtonSize size) {
 	@Override
 	public void render(Context context, SafeHtml data, SafeHtmlBuilder sb) {
 		sb.appendHtmlConstant("<button type=\"button\" class=\"btn "
-				+ (type != null ? type.get() : "") + (size != null ? " " + size.get() : "") + "\" tabindex=\"-1\">");
+				+ (type != null ? type.get() : "")
+				+ (size != null ? " " + size.get() : "")
+				+ "\" "
+				+ (isEnabled ? "" : "disabled=\"disabled\"")
+				+ "tabindex=\"-1\">");
 		if (data != null) {
 			if (icon != null) {
                 sb.appendHtmlConstant("<i class=\"" + icon.get() + "\"></i> ");
@@ -92,6 +99,16 @@ public void render(Context context, SafeHtml data, SafeHtmlBuilder sb) {
 		sb.appendHtmlConstant("</button>");
 	}
 
+	@Override
+	public boolean isEnabled() {
+		return isEnabled;
+	}
+
+	@Override
+	public void setEnabled(boolean enabled) {
+		isEnabled = enabled;
+	}
+	
     public IconType getIcon() {
         return icon;
     }
@@ -116,5 +133,5 @@ public void setSize(ButtonSize size) {
 		this.size = size;
 	}
 
-    // TODO add icon size support
+	// TODO add icon size support
 }