first commit

1 files changed, 302 insertions, 0 deletions

diff --git a/src/Label.cs b/src/Label.cs
new file mode 100644
index 00000000..699c2e88
--- /dev/null
+++ b/src/Label.cs
@@ -0,0 +1,302 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Diagnostics;
+using Cairo;
+
+namespace go
+{
+    public class Label : GraphicObject
+    {
+        //static constructor to init label specific theme value
+        public static class Theme
+        {
+            public static Color background = Color.Transparent;
+            public static Color borderColor = Color.White;
+            public static int margin = 0;
+            public static int borderWidth = 0;
+            public static VerticalAlignment verticalAlignment = VerticalAlignment.None;
+            public static HorizontalAlignment horizontalAlignment = HorizontalAlignment.None;
+            public static bool sizeToContent = false;
+            //label specific
+            public static int fontSize = 10;
+            public static Color fontColor = Color.White;
+        }
+
+        public Label(string _text)
+            : base()
+        {
+            init();
+            updateFont();
+            text = _text;
+
+        }
+
+        void init()
+        {
+            background = Theme.background;
+            borderColor = Theme.borderColor;
+            borderWidth = Theme.borderWidth;
+            margin = Theme.margin;
+            horizontalAlignment = Theme.horizontalAlignment;
+            verticalAlignment = Theme.verticalAlignment;
+            sizeToContent = Theme.sizeToContent;
+            fontSize = Theme.fontSize;
+            fontColor = Theme.fontColor;
+        }
+
+
+
+        protected string _text = "label";
+        int _fontSize;
+        Color _fontColor;
+
+        public string text
+        {
+            get { return _text; }
+            set
+            {
+                if (_text == value)
+                    return;
+
+                registerForGraphicUpdate();
+
+                //if (value.Length != _text.Length)
+                //    layoutIsValid = false;
+
+                _text = value;                
+            }
+        }
+        public int fontSize
+        {
+            get { return _fontSize; }
+            set
+            {
+                _fontSize = value;
+                registerForGraphicUpdate();
+            }
+        }        
+        public Color fontColor
+        {
+            get { return _fontColor; }
+            set 
+            { 
+                _fontColor = value;
+                registerForGraphicUpdate();
+            }
+        }
+
+        public byte[] utf8Text
+        {
+            get { return System.Text.UTF8Encoding.UTF8.GetBytes(text); }
+        }
+        
+        protected Rectangle rText;
+		
+        //public FontStyle fontStyle
+        //{
+        //    get { return _fontStyle; }
+        //    set
+        //    {
+        //        _fontStyle = value;
+        //        updateFont();
+        //    }
+        //}
+        //public FontFamily fontFamily
+        //{
+        //    get { return _fontFamily; }
+        //    set
+        //    {
+        //        _fontFamily = value;
+        //        updateFont();
+        //    }
+        //}
+
+        
+
+        //Font TextFont;
+
+        public Alignment textAlignment = Alignment.LeftCenter;
+
+
+
+        void updateFont()
+        {
+            //TextFont = new Font(fontFamily, fontSize, fontStyle, GraphicsUnit.Pixel);
+            bmp = null;
+        }
+
+        public override Size measureRawSize()
+        {
+            byte[] txt = utf8Text;
+            
+            Size s;
+
+            using (Context gr = new Context(new ImageSurface(Format.Argb32,1,1)))
+            {
+                gr.SetFontSize(fontSize);
+				TextExtents te;
+#if _WIN32 || _WIN64
+                te =  gr.TextExtents(utf8Text);
+#elif __linux__
+                te =  gr.TextExtents(text);
+#endif
+                FontExtents fe = gr.FontExtents;
+                s = new Size((int)Math.Ceiling(te.XAdvance),(int)Math.Ceiling(fe.Height));
+            }
+            return s;// +borderWidth;
+        }
+
+        internal override void updateGraphic()
+        {
+            byte[] txt = utf8Text;
+            int stride = 4 * renderBounds.Width;
+
+
+            //init  bmp with widget background and border
+            base.updateGraphic();
+
+            using (ImageSurface bitmap =
+                new ImageSurface(bmp, Format.Argb32, renderBounds.Width, renderBounds.Height, stride))
+            {
+                using (Context gr = new Context(bitmap))
+                {
+                    gr.FontOptions.Antialias = Antialias.Subpixel;
+                    gr.FontOptions.HintMetrics = HintMetrics.On;
+                    gr.SetFontSize(fontSize);
+                    FontExtents fe = gr.FontExtents;
+                    rText = new Rectangle(new Point(0,0), measureRawSize());
+                    //gr.Rotate(Math.PI);
+                    
+                    //  double a = Math.PI;
+                    //gr.Transform(new c.Matrix(Math.Cos(a),-Math.Sin(a),Math.Sin(a),Math.Cos(a),renderBounds.Width,renderBounds.Height));
+                    gr.Antialias = Antialias.Subpixel;
+                    gr.LineWidth = borderWidth;
+
+                    float widthRatio = 1f;
+                    float heightRatio = 1f;
+
+                    Rectangle cb = clientBounds;
+
+                    //ignore text alignment if size to content = true
+                    if (!sizeToContent)
+                    {
+                        switch (textAlignment)
+                        {
+                            case Alignment.None:
+                                break;
+                            case Alignment.TopLeft:     //ok
+                                rText.X = cb.X;
+                                rText.Y = cb.Y;
+                                break;
+                            case Alignment.TopCenter:   //ok
+                                rText.Y = cb.Y;
+                                rText.X = cb.X + cb.Width / 2 - rText.Width / 2;
+                                break;
+                            case Alignment.TopRight:    //ok
+                                rText.X = cb.Right - rText.Width;
+                                rText.Y = cb.Y;
+                                break;
+                            case Alignment.TopStretch://ok
+                                heightRatio = widthRatio = (float)cb.Width / rText.Width;
+                                rText.X = cb.X;
+                                rText.Y = cb.Y;
+                                rText.Width = cb.Width;
+                                rText.Height = (int)(rText.Height * heightRatio);
+                                break;
+                            case Alignment.LeftCenter://ok
+                                rText.X = cb.X;
+                                rText.Y = cb.Y + cb.Height / 2 - rText.Height / 2;
+                                break;
+                            case Alignment.LeftStretch://ok
+                                heightRatio = widthRatio = (float)cb.Height / rText.Height;
+                                rText.X = cb.X;
+                                rText.Y = cb.Y;
+                                rText.Height = cb.Height;
+                                rText.Width = (int)(widthRatio * cb.Width);
+                                break;
+                            case Alignment.RightCenter://ok
+                                rText.X = cb.X + cb.Width - rText.Width;
+                                rText.Y = cb.Y + cb.Height / 2 - rText.Height / 2;
+                                break;
+                            case Alignment.RightStretch://ok
+                                heightRatio = widthRatio = (float)cb.Height / rText.Height;
+                                rText.Height = cb.Height;
+                                rText.Width = (int)(widthRatio * cb.Width);
+                                rText.X = cb.X;
+                                rText.Y = cb.Y;
+                                break;
+                            case Alignment.BottomCenter://ok
+                                rText.X = cb.Width / 2 - rText.Width / 2;
+                                rText.Y = cb.Height - rText.Height;
+                                break;
+                            case Alignment.BottomStretch://ok
+                                heightRatio = widthRatio = (float)cb.Width / rText.Width;
+                                rText.Width = cb.Width;
+                                rText.Height = (int)(rText.Height * heightRatio);
+                                rText.Y = cb.Bottom - rText.Height;
+                                rText.X = cb.X;
+                                break;
+                            case Alignment.BottomLeft://ok
+                                rText.X = cb.X;
+                                rText.Y = cb.Bottom - rText.Height;
+                                break;
+                            case Alignment.BottomRight://ok
+                                rText.Y = cb.Bottom - rText.Height;
+                                rText.X = cb.Right - rText.Width;
+                                break;
+                            case Alignment.Center://ok
+                                rText.X = cb.X + cb.Width / 2 - rText.Width / 2;
+                                rText.Y = cb.Y + cb.Height / 2 - rText.Height / 2;
+                                break;
+                            case Alignment.Fit://ok, peut être mieu aligné                            
+                                widthRatio = (float)cb.Width / rText.Width;
+                                heightRatio = (float)cb.Height / rText.Height;
+                                rText = cb.Clone;
+                                break;
+                            case Alignment.HorizontalStretch://ok
+                                heightRatio = widthRatio = (float)cb.Width / rText.Width;
+                                rText.Width = cb.Width;
+                                rText.Height = (int)(heightRatio * rText.Height);
+                                rText.Y = cb.Y + cb.Height / 2 - rText.Height / 2;
+                                rText.X = cb.X;
+                                break;
+                            case Alignment.VerticalStretch://ok
+                                heightRatio = widthRatio = (float)cb.Height / rText.Height;
+                                rText.Height = cb.Height;
+                                rText.Width = (int)(widthRatio * rText.Width);
+                                rText.X = cb.X + cb.Width / 2 - rText.Width / 2;
+                                rText.Y = cb.Y;
+                                break;
+                            default:
+                                break;
+                        }
+                    }
+                                      
+
+                    gr.Color = fontColor;
+
+                    gr.FontMatrix = new Matrix(widthRatio * fontSize, 0, 0, heightRatio * fontSize, 0, 0);
+                    
+                    fe = gr.FontExtents;  
+
+                    gr.MoveTo(rText.X, rText.Y + fe.Ascent);
+#if _WIN32 || _WIN64
+                    gr.ShowText(txt);
+#elif __linux__
+                    gr.ShowText(text);
+#endif
+
+                    gr.Fill();
+                    
+                }
+                bitmap.Flush();
+                //bitmap.WriteToPng(directories.rootDir + @"test.png");
+            }
+
+            //registerForRedraw();
+        }
+
+    }
+}