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Drawing Operations

Drawing Operations. NameSpaces : System.Drawing System.Drawing.Drawing2D. Color. Used for representing color There are two ways to create color object RGB values Color c = Color.FromArgb(100, 100, 255); Predefined Colors Color c1 = Color.LavenderBlush; . Graphics Class.

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Drawing Operations

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  1. Drawing Operations NameSpaces : System.Drawing System.Drawing.Drawing2D

  2. Color • Used for representing color • There are two ways to create color object • RGB values • Color c = Color.FromArgb(100, 100, 255); • Predefined Colors • Color c1 = Color.LavenderBlush;

  3. Graphics Class • Using for drawing a surface. • There are two ways to obtain graphics object • In Paint event handler • In other functions

  4. Graphics Class Functions • DrawCurve • DrawEllipse • DrawImage • DrawPath • DrawPolygon • DrawRectangle • DrawString • FillEllipse • FillPath • FillRectangle

  5. Point Structure • Represents a point • Used in some functions or structures to represent a location • Definition example Point p = new Point(2, 1); • Point (0,0) is upper-left corner of the form Point (0,0)

  6. Pen Class • Used for drawing lines, arcs and shapes. • Simple usage;

  7. Pen Class - Properties • Color : Color for pen. • Width : Width of the pen. • DashStyle: Style of dashed lines. • StartCap – EndCap : Cap style used in start and end of the line. • LineJoin : ıntersection style of consecutive lines (smooth, sharp)

  8. Pen Class – Color & Width Properties

  9. Pen Class – DashStyle • Line drawing style

  10. Pen Class – LineJoin & LineCaps Edges are smooth

  11. Brush Class • Used for painting graphical objects.

  12. LinearGradientBrush • Used for drawing object in desired pattern.

  13. Exercise • Write a drawing program that is used with mouse movements. • Let there be an option of picking color. • Let there be an option of picking line width.

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