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-rw-r--r--src/Label.cs302
1 files changed, 302 insertions, 0 deletions
diff --git a/src/Label.cs b/src/Label.cs
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+++ b/src/Label.cs
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+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();
+ }
+
+ }
+}
generated by cgit v1.3.1-4-g156e (git 2.54.0) at 2026-11-12 17:43:03 +0000