#967 add an option to specify the width of the colums

src/main/java/net/bootsfaces/component/dataTable/DataTableRenderer.java

@@ -468,6 +468,13 @@ private void generateHeader(FacesContext context, DataTable dataTable, ResponseW
 				}
 			}
 
+			if (column.getAttributes().get("width") != null) {
+				String width = column.getAttributes().get("width").toString();
+				if (isNumeric(width)) {
+					width+= "px";
+				}
+				updateColumnDefinition(dataTable, index, "'width':'" + width + "'");
+			}
 
 			if (column.getAttributes().get("customOptions") != null) {
 				String customOptions = column.getAttributes().get("customOptions").toString();
@@ -860,4 +867,13 @@ protected void updateColumnDefinition(DataTable dataTable, int index, String val
 
 	}
 
+	public static boolean isNumeric(String str)
+	{
+	    for (char c : str.toCharArray())
+	    {
+	        if (!Character.isDigit(c)) return false;
+	    }
+	    return true;
+	}
+
 }

src/main/java/net/bootsfaces/component/dataTableColumn/DataTableColumnCore.java

@@ -24,26 +24,7 @@
 public abstract class DataTableColumnCore extends UIColumn {
 
 	protected enum PropertyKeys {
-		contentStyle,
-		contentStyleClass,
-		customOptions,
-		dataOrder,
-		dataSearch,
-		dataType,
-		footerStyle,
-		footerStyleClass,
-		headerStyle,
-		headerStyleClass,
-		label,
-		labelStyle,
-		labelStyleClass,
-		order,
-		orderBy,
-		orderable,
-		searchValue,
-		searchable,
-		style,
-		styleClass;
+		contentStyle, contentStyleClass, customOptions, dataOrder, dataSearch, dataType, footerStyle, footerStyleClass, headerStyle, headerStyleClass, label, labelStyle, labelStyleClass, order, orderBy, orderable, searchValue, searchable, style, styleClass, width;
 		String toString;
 
 		PropertyKeys(String toString) {
@@ -378,4 +359,20 @@ public void setStyleClass(String _styleClass) {
 		getStateHelper().put(PropertyKeys.styleClass, _styleClass);
 	}
 
+	/**
+	 * Width of the column. If you don't specify the unit, BootsFaces assumes you want to use 'px'. You can use the other units by adding them to the value, such as '50%', '5em', '16vw', etc. <P>
+	 * @return Returns the value of the attribute, or null, if it hasn't been set by the JSF file.
+	 */
+	public String getWidth() {
+		return (String) getStateHelper().eval(PropertyKeys.width);
+	}
+
+	/**
+	 * Width of the column. If you don't specify the unit, BootsFaces assumes you want to use 'px'. You can use the other units by adding them to the value, such as '50%', '5em', '16vw', etc. <P>
+	 * Usually this method is called internally by the JSF engine.
+	 */
+	public void setWidth(String _width) {
+		getStateHelper().put(PropertyKeys.width, _width);
+	}
+
 }

src/main/meta/META-INF/bootsfaces-b.taglib.xml

@@ -7129,6 +7129,12 @@
 		  <required>false</required>
 		  <type>java.lang.String</type>
 		</attribute>
+		<attribute>
+		  <description><![CDATA[Width of the column. If you don't specify the unit, BootsFaces assumes you want to use 'px'. You can use the other units by adding them to the value, such as '50%', '5em', '16vw', etc.]]></description>
+		  <name>width</name>
+		  <required>false</required>
+		  <type>java.lang.String</type>
+		</attribute>
 	</tag>
 
 	<!-- *********** b:datepicker ************************* -->

xtext/BootsFaces.jsfdsl

@@ -628,6 +628,7 @@ widget dataTableColumn {
     orderable          Boolean default "true"                              "Disables or enables the sort button for this column."
     searchable         Boolean default "true"                              "If set to false, this column is excluded from the multi-column-search feature of b:dataTable. Defaults to true. Note that this feature is active only if both searching='true' and multi-column-search='true' are set on the datatable."
     value              inherited                                           "EL expression referring to the back-end bean attribute providing the value of the field."
+	width                                                                  "Width of the column. If you don't specify the unit, BootsFaces assumes you want to use 'px'. You can use the other units by adding them to the value, such as '50%', '5em', '16vw', etc."
 	+style
 }