Lab 4 - Graphics

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System.Drawing Lucru cu obiecte de desenare Lucru cu imagini Lucru cu text

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System.Drawing

Drawing2D Bitmap

Color, Point Size, Rectangle Brush

Font

Pen

Icon

Image

Graphics Metafile

SystemBrushes SystemColors SystemFonts SystemPans SystemIcons

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Color  Metode statice: FromArgb, FromName

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Point, PointF (prop: IsEmpty) Size, SizeF Rectangle, RectangleF

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Linie,curba cu o anumita grosime si stil Proprietati      

Color, Width DashOffset, DashPattern StartCap, StopCap DashCap: Flat, Round, Triangle DashStyle: Dash, Dot, DashDot, DashDotDot LineCap: Flat, Round, Triangle … 5

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Clasa abstracta Obiectul se obtine din:       

HatchBrush LinearGradientBrush PathGradientBrush SolidBrush TextureBrush Brushes SystemBrushes 6

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Nu se poate deriva sau instantia Obiectul se obtine cu:  CreateGraphics  FromImage

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Furnizeaza metode pentru desenare    

Clear DrawEllipse, DrawImage, DrawLine, DrawLines DrawPath, DrawPie, DrawPolygon, DrawRectangle DrawString, FillPolygon, FillEllipse, FillRectangle 7

Graphics g = this.CreateGraphics(); Pen p = new Pen(Color.Red, 3); p.DashPattern = new float[4] { 1, 2, 3, 2 }; p.EndCap = LineCap.DiamondAnchor; p.StartCap = LineCap.RoundAnchor; g.DrawLine(p, 10, 10, 100, 100); g.DrawBezier(p, 10, 10, 300, 70, 70, 30, 50, 50); Brush b = new LinearGradientBrush(new Point(60, 60), new Point(100, 100), Color.Red, Color.Blue); g.FillPie(b, new Rectangle(80, 100, 100, 120), 0, 300); 8

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Clasa abstracta Creare, modificare, incarcare, salvare de imagini Obiectul se obtine din: FromFile, FromStream Ofera suport pentru clasele Bitmap, Metafile Afisare se face cu:  Proprietatea BackgroundImage de la control  Metoda DrawImage de la Graphics 10

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Editarea:  Cu obiectul de tip Graphics

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Salvare:  Metoda Save  Fomat de salvare: Bmp, Gif, Icon, Jpeg, Tiff

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Se creaza obiectul din:  image, stream, file, blank

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Metode  GetPixel, SetPixel  RotateFlip(RotateFlipType ) b.SetPixel(Color.Red,10,10); b.RotateFlip(RotateFlipType.Rotate180FlipY);

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Bitmap bitmap = new Bitmap("d:\\map.jpg"); this.BackgroundImage = bitmap; Graphics g = Graphics.FromImage(bitmap); g.DrawLine(new Pen(Color.Red, 2), 0, bitmap.Height 20, bitmap.Width, bitmap.Height - 20); g.DrawLine(new Pen(Color.FromArgb(200, Color.Red)), 0, bitmap.Height - 5, bitmap.Width, bitmap.Height 5); g.DrawIcon(SystemIcons.Error, 40, 40); bitmap.Save("d:\\map2.jpeg", System.Drawing.Imaging.ImageFormat.Jpeg); 13

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Afisare, desenare mesaj  Graphics.DrawString  Parametri: String, Font, Brush, PointF | RectangleF StringFormat

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Clasa Font  Constructor  String | FontFamily , Dimensiune, FontStyle  ex: new Font(“Arial”,12,FontStyle.Bold ) 15

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Proprietati:  Alignment – alinierea orizontala a textului  StringAlignment: Center, Near, Far

 FormatFlags – proprietati  StringFormatFlags: DirectionRightToLeft, NoClip DirectionVertical, NoFontFallback, LineLimit

 LineAlignment – alinierea verticala  StringFormat: … 16

 Trimming – mod de afisare  StringTrimming: Character, EllipsisCharacter, EllipsisPath, EllipsisWord, None, Word

Font f = new Font("Arial", 18, FontStyle.Bold); string str = "MAP TUIASI"; StringFormat sf = new StringFormat(); sf.FormatFlags = StringFormatFlags.DirectionVertical; g.DrawString(str, f, Brushes.Blue, 40, 70, sf); 17

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