Add control elements for columns.

- NEU: Steuer-Elemente für Spalten.

zaaReloaded2/Controller/Elements/ControlElementBase.cs

@@ -26,12 +26,23 @@ namespace zaaReloaded2.Controller.Elements
     /// </summary>
     public abstract class ControlElementBase : ElementBase
     {
+        #region Propertis
+
         /// <summary>
         /// Gets a list of child elements, all of which must be derived
         /// from FormatElementBase.
         /// </summary>
         public IList<FormatElementBase> Children { get; internal set; }
 
+        /// <summary>
+        /// Informs whether this control element can have child elements.
+        /// </summary>
+        public virtual bool CanHaveChildren { get { return true; } }
+
+        #endregion
+
+        #region Constructors
+
         public ControlElementBase()
             : this(new List<FormatElementBase>())
         { }
@@ -45,6 +56,10 @@ namespace zaaReloaded2.Controller.Elements
             : this(new List<FormatElementBase>() { children })
         { }
 
+        #endregion
+
+        #region Protected methods
+
         /// <summary>
         /// Creates a clone of the Children list (for use in cloning
         /// derived classes).
@@ -54,5 +69,7 @@ namespace zaaReloaded2.Controller.Elements
         {
             return Children.Select(child => child.Clone() as FormatElementBase).ToList();
         }
+
+        #endregion
     }
 }

zaaReloaded2/Controller/Elements/FormatElementBase.cs

@@ -32,7 +32,6 @@ namespace zaaReloaded2.Controller.Elements
             set
             {
                 _content = value;
-
             }
         }
 

zaaReloaded2/Controller/Elements/NextColumn.cs

@@ -0,0 +1,54 @@
+/* NextColumn.cs
+ * part of zaaReloaded2
+ * 
+ * Copyright 2015 Daniel Kraus
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace zaaReloaded2.Controller.Elements
+{
+    /// <summary>
+    /// Format element that causes a Formatter object to move the
+    /// insertion point to the next colum in a layout table.
+    /// </summary>
+    class NextColumn : ControlElementBase
+    {
+        public override string Label
+        {
+            get { return "Nächste Spalte"; }
+        }
+
+        public override bool CanHaveChildren
+        {
+            get
+            {
+                return false;
+            }
+        }
+
+        public override void Run(Formatter.Formatter formatter)
+        {
+            formatter.NextColumn();
+        }
+
+        protected override ElementBase CreateInstance()
+        {
+            return new NextColumn();
+        }
+    }
+}

zaaReloaded2/Controller/Elements/TwoColumns.cs

@@ -0,0 +1,54 @@
+/* TwoColumns.cs
+ * part of zaaReloaded2
+ * 
+ * Copyright 2015 Daniel Kraus
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace zaaReloaded2.Controller.Elements
+{
+    /// <summary>
+    /// Format element that causes a Formatter object to insert a table with
+    /// two columns and one row into the documents.
+    /// </summary>
+    class TwoColumns : ControlElementBase
+    {
+        public override string Label
+        {
+            get { return "Zwei Spalten einfügen"; }
+        }
+
+        public override bool CanHaveChildren
+        {
+            get
+            {
+                return false;
+            }
+        }
+
+        public override void Run(Formatter.Formatter formatter)
+        {
+            formatter.InsertTwoColumns();
+        }
+
+        protected override ElementBase CreateInstance()
+        {
+            return new TwoColumns();
+        }
+    }
+}