Add beginning of label

Application.cs → Core.cs

@@ -66,6 +66,8 @@ namespace Terminal {
         public void SetNeedsDisplay ()
         {
             NeedDisplay = true;
+            if (container != null)
+                container.SetNeedsDisplay ();
         }
 
         /// <summary>
@@ -426,7 +428,7 @@ namespace Terminal {
                 Driver.AddStr ("Line: " + i);
             }
         }
-#endif
+#endif  
     }
 
     /// <summary>
@@ -630,9 +632,10 @@ namespace Terminal {
                     MainLoop.MainIteration();
                     if (Iteration != null)
                         Iteration(null, EventArgs.Empty);
-                }
-                else if (wait == false)
+                } else if (wait == false)
                     return;
+                if (state.Toplevel.NeedDisplay)
+                    state.Toplevel.Redraw ();
             }
         }
 

driver.cs → Driver.cs

@@ -85,6 +85,7 @@ namespace Terminal {
 
         public override void AddStr (string str)
         {
+            // TODO; optimize this to determine if the str fits in the clip region, and if so, use Curses.addstr directly
             foreach (var c in str)
                 AddCh ((int) c);
         }

Terminal.csproj

@@ -32,18 +32,22 @@
     <Reference Include="System" />
   </ItemGroup>
   <ItemGroup>
-    <Compile Include="Application.cs" />
-    <Compile Include="driver.cs" />
+    <Compile Include="Core.cs" />
+    <Compile Include="Driver.cs" />
     <Compile Include="Event.cs" />
     <Compile Include="Types\Point.cs" />
     <Compile Include="Types\Rect.cs" />
     <Compile Include="Types\Size.cs" />
     <Compile Include="demo.cs" />
+    <Compile Include="Views\Label.cs" />
   </ItemGroup>
   <ItemGroup>
    <Reference Include="mono-curses.dll">
      <HintPath>$(MSBuildProjectDirectory)/../mono-curses/mono-curses.dll</HintPath>
    </Reference>
   </ItemGroup>
+  <ItemGroup>
+    <Folder Include="Views\" />
+  </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
 </Project>

Views/Label.cs

@@ -0,0 +1,98 @@
+
+using System;
+
+namespace Terminal {
+    public enum TextAlignment {
+        Left, Right, Centered, Justified
+    }
+
+    /// <summary>
+    ///   Label widget, displays a string at a given position, can include multiple lines.
+    /// </summary>
+    public class Label : View {
+        string text;
+        TextAlignment textAlignment;
+
+        static Rect CalcRect (int x, int y, string s)
+        {
+            int mw = 0;
+            int ml = 1;
+
+            int cols = 0;
+            foreach (var c in s) {
+                if (c == '\n'){
+                    ml++;
+                    if (cols > mw)
+                        mw = cols;
+                    cols = 0;
+                } else
+                    cols++;
+            }
+            return new Rect (x, y, cols, ml);
+        }
+
+        /// <summary>
+        ///   Public constructor: creates a label at the given
+        ///   coordinate with the given string, computes the bounding box
+        ///   based on the size of the string, assumes that the string contains
+        ///   newlines for multiple lines, no special breaking rules are used.
+        /// </summary>
+        public Label (int x, int y, string text) : this (CalcRect (x, y, text), text)
+        {
+        }
+
+        /// <summary>
+        ///   Public constructor: creates a label at the given
+        ///   coordinate with the given string and uses the specified
+        ///   frame for the string.
+        /// </summary>
+        public Label (Rect rect, string text) : base (rect)
+        {
+            this.text = text;
+        }
+
+        public override void Redraw ()
+        {
+            if (TextColor != -1)
+                Driver.SetColor (TextColor);
+            else
+                Driver.SetColor(Colors.Base.Normal);
+
+            Clear ();
+            Move (Frame.X, Frame.Y);
+            Driver.AddStr (text);
+        }
+
+        /// <summary>
+        ///   The text displayed by this widget.
+        /// </summary>
+        public virtual string Text {
+            get => text;
+            set {
+                text = value;
+                SetNeedsDisplay ();
+            }
+        }
+
+        public TextAlignment TextAlignment {
+            get => textAlignment;
+            set {
+                textAlignment = value;
+                SetNeedsDisplay ();
+            }
+        }
+
+        /// <summary>
+        ///   The color used for the label
+        /// </summary>        
+        Color textColor = -1;
+        public Color TextColor {
+            get => textColor;
+            set {
+                textColor = value;
+                SetNeedsDisplay ();
+            }
+        }
+    }
+
+}