Drawing and Java2D

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paint() vs. paintComponent() JFrames: use paint() method JPanels and other JComponents: usepaintComponent() paint() and paintComponent() are onlycalled when a redraw is necessary● e.g., expose after being covered If you make a change and want to request aredraw, call● repaint() (method of JFrame or Jcomponents)● Actual repainting may happen a bit laterCMPT166: drawing and Java2D 15 Feb 201110
Lines and rectangles import java.awt.Graphics; g.drawLine( int x1, int y1, int x2, int y2 );● Coordinates in pixels from top-left of component drawRect( x, y, w, h ), fillRect● (x,y) is top-left corner of rectangle draw3DRect( x, y, w, h, boolean raised )● Border-shading so it looks raised or sunken drawRoundRect( x, y, w, h, arcW, arcH )● Specify diameter of rounded cornersCMPT166: drawing and Java2D 15 Feb 201111
Page 8 and 9: WindowAdapter class Implementing th
Page 12 and 13: Ovals and arcs g.drawOval( x, y, w,
Page 14 and 15: Steps to draw in a widget Subclass
Page 16 and 17: Line stroke Stroking is how lines a
Page 18 and 19: Reading images from file ImageIO li
Page 20 and 21: Clipping The current clip is the vi
Page 22 and 23: Coordinate transforms Default has o

Drawing and Java2D

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