Java by API/org.eclipse.swt.graphics/GC

Материал из Java эксперт
Перейти к: навигация, поиск

drawText(String string, int x, int y, int flags)

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.events.PaintEvent; import org.eclipse.swt.events.PaintListener; import org.eclipse.swt.graphics.Rectangle; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Canvas; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class MainClass { 

 public static void main(String[] a) {
   final Display d = new Display();
   final Shell shell = new Shell(d);
   shell.setSize(250, 200);
   shell.setLayout(new FillLayout());
   // Create a canvas
   Canvas canvas = new Canvas(shell, SWT.NONE);
   canvas.addPaintListener(new PaintListener() {
     public void paintControl(PaintEvent e) {
       // Do some drawing
       Rectangle rect = ((Canvas) e.widget).getBounds();
       e.gc.setForeground(e.display.getSystemColor(SWT.COLOR_RED));
       e.gc.drawFocus(5, 5, rect.width - 10, rect.height - 10);
       e.gc.drawText("www.jexp.ru", 5, 50, SWT.DRAW_MNEMONIC | SWT.DRAW_DELIMITER
           | SWT.DRAW_TAB | SWT.DRAW_TRANSPARENT);
     }
   });    
   
   
   shell.open();
   while (!shell.isDisposed()) {
     if (!d.readAndDispatch())
       d.sleep();
   }
   d.dispose();
 }

} 

      </source>



GC: drawFocus(int x, int y, int width, int height)

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.events.PaintEvent; import org.eclipse.swt.events.PaintListener; import org.eclipse.swt.graphics.Rectangle; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Canvas; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class MainClass { 

 public static void main(String[] a) {
   final Display d = new Display();
   final Shell shell = new Shell(d);
   shell.setSize(250, 200);
   shell.setLayout(new FillLayout());
   // Create a canvas
   Canvas canvas = new Canvas(shell, SWT.NONE);
   canvas.addPaintListener(new PaintListener() {
     public void paintControl(PaintEvent e) {
       // Do some drawing
       Rectangle rect = ((Canvas) e.widget).getBounds();
       e.gc.setForeground(e.display.getSystemColor(SWT.COLOR_RED));
       e.gc.drawFocus(5, 5, rect.width - 10, rect.height - 10);
       e.gc.drawText("www.jexp.ru", 5, 50, SWT.DRAW_MNEMONIC | SWT.DRAW_DELIMITER
           | SWT.DRAW_TAB | SWT.DRAW_TRANSPARENT);
     }
   });    
   
   
   shell.open();
   while (!shell.isDisposed()) {
     if (!d.readAndDispatch())
       d.sleep();
   }
   d.dispose();
 }

} 


      </source>



GC: drawImage(Image image, int x, int y)

   <source lang="java">

import org.eclipse.swt.events.PaintEvent; import org.eclipse.swt.events.PaintListener; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.graphics.ImageData; import org.eclipse.swt.graphics.Rectangle; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class MainClass { 

 public static void main(String[] args) {
 Display display = new Display();
   final Shell shell = new Shell(display);
   final Image image = new Image(display, new MainClass().getClass().getResourceAsStream(
       "swt.png"));
   System.out.println(image.getImageData().scanlinePad);
   image.getImageData().scanlinePad = 40;
   System.out.println(image.getImageData().scanlinePad);
   shell.addPaintListener(new PaintListener() {
     public void paintControl(PaintEvent event) {
       event.gc.drawImage(image, 0, 0);
       Rectangle rect = shell.getClientArea();
       ImageData data = image.getImageData();
       int srcX = data.width / 4;
       int srcY = data.height / 4;
       int srcWidth = data.width / 2;
       int srcHeight = data.height / 2;
       int destWidth = 2 * srcWidth;
       int destHeight = 2 * srcHeight;
       event.gc.drawImage(image, srcX, srcY, srcWidth, srcHeight, rect.width
           - destWidth, rect.height - destHeight, destWidth, destHeight);
     }
   });
   shell.setText("Draw Images");
   shell.open();
   while (!shell.isDisposed()) {
     if (!display.readAndDispatch()) {
       display.sleep();
     }
   }
   image.dispose();
   display.dispose();
 }

} 

      </source>



GC: drawLine(int x1, int y1, int x2, int y2)

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.events.PaintEvent; import org.eclipse.swt.events.PaintListener; import org.eclipse.swt.graphics.Rectangle; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Canvas; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class MainClass { 

 public static void main(String[] a) {
   final Display d = new Display();
   final Shell shell = new Shell(d);
   shell.setSize(250, 200);
   shell.setLayout(new FillLayout());
   // Create a canvas
   Canvas canvas = new Canvas(shell, SWT.NONE);
   canvas.addPaintListener(new PaintListener() {
     public void paintControl(PaintEvent e) {
       e.gc.setLineWidth(10);
       e.gc.drawLine(0, 0, 100, 100);
     }
   });    
   
   
   shell.open();
   while (!shell.isDisposed()) {
     if (!d.readAndDispatch())
       d.sleep();
   }
   d.dispose();
 }

} 

      </source>



GC: drawOval(int x, int y, int width, int height)

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.events.PaintEvent; import org.eclipse.swt.events.PaintListener; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Canvas; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class MainClass { 

 public static void main(String[] a) {
   final Display d = new Display();
   final Shell shell = new Shell(d);
   shell.setSize(250, 200);
   shell.setLayout(new FillLayout());
   // Create a canvas
   Canvas canvas = new Canvas(shell, SWT.NONE);
   canvas.addPaintListener(new PaintListener() {
     public void paintControl(PaintEvent e) {
       e.gc.setForeground(e.display.getSystemColor(SWT.COLOR_BLACK));
       e.gc.drawOval(100, 20, 100, 50);
       
     }
   });    
   
   
   shell.open();
   while (!shell.isDisposed()) {
     if (!d.readAndDispatch())
       d.sleep();
   }
   d.dispose();
 }

} 

      </source>



GC: drawPoint(int x, int y)

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.events.PaintEvent; import org.eclipse.swt.events.PaintListener; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Canvas; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class MainClass { 

 public static void main(String[] a) {
   final Display d = new Display();
   final Shell shell = new Shell(d);
   shell.setSize(250, 200);
   shell.setLayout(new FillLayout());
   // Create a canvas
   Canvas canvas = new Canvas(shell, SWT.NONE);
   canvas.addPaintListener(new PaintListener() {
     public void paintControl(PaintEvent e) {
       Canvas canvas = (Canvas) e.widget;
       int maxX = canvas.getSize().x;
       int maxY = canvas.getSize().y;
       int halfY = (int) maxY / 2;
       e.gc.setForeground(e.display.getSystemColor(SWT.COLOR_BLACK));
       e.gc.drawLine(0, halfY, maxX, halfY);
       
       for (int i = 0; i < maxX; i++) {
         e.gc.drawPoint(i, getNormalizedSine(i, halfY, maxX));
       }
     }
     int getNormalizedSine(int x, int halfY, int maxX) {
       double piDouble = 2 * Math.PI;
       double factor = piDouble / maxX;
       return (int) (Math.sin(x * factor) * halfY + halfY);
     }      
   });    
   
   
   shell.open();
   while (!shell.isDisposed()) {
     if (!d.readAndDispatch())
       d.sleep();
   }
   d.dispose();
 }

} 

      </source>



GC: drawPolygon(int[] pointArray)

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.events.PaintEvent; import org.eclipse.swt.events.PaintListener; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Canvas; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class MainClass { 

 public static void main(String[] a) {
   final Display d = new Display();
   final Shell shell = new Shell(d);
   shell.setSize(250, 200);
   shell.setLayout(new FillLayout());
   // Create a canvas
   Canvas canvas = new Canvas(shell, SWT.NONE);
   canvas.addPaintListener(new PaintListener() {
     public void paintControl(PaintEvent e) {
       Canvas canvas = (Canvas) e.widget;
       int x = canvas.getBounds().width;
       int y = canvas.getBounds().height;
       e.gc.setBackground(e.display.getSystemColor(SWT.COLOR_BLACK));
       int[] upper_left = { 0, 0, 200, 0, 0, 200};
       int[] lower_right = { x, y, x, y - 200, x - 200, y};
       e.gc.fillPolygon(upper_left);
       e.gc.fillPolygon(lower_right);
       
     }
   });    
   
   
   shell.open();
   while (!shell.isDisposed()) {
     if (!d.readAndDispatch())
       d.sleep();
   }
   d.dispose();
 }

} 

      </source>



GC: drawRoundRectangle(int x, int y, int width, int height, int arcWidth, int arcHeight)

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.events.PaintEvent; import org.eclipse.swt.events.PaintListener; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Canvas; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class MainClass { 

 public static void main(String[] a) {
   final Display d = new Display();
   final Shell shell = new Shell(d);
   shell.setSize(250, 200);
   shell.setLayout(new FillLayout());
   // Create a canvas
   Canvas canvas = new Canvas(shell, SWT.NONE);
   canvas.addPaintListener(new PaintListener() {
     public void paintControl(PaintEvent e) {
       e.gc.drawRoundRectangle(10, 10, 200, 200, 30, 60);
       
     }
   });    
   
   
   shell.open();
   while (!shell.isDisposed()) {
     if (!d.readAndDispatch())
       d.sleep();
   }
   d.dispose();
 }

} 

      </source>



GC: drawText(String string, int x, int y)

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.events.PaintEvent; import org.eclipse.swt.events.PaintListener; import org.eclipse.swt.graphics.Rectangle; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Canvas; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class MainClass { 

 public static void main(String[] a) {
   final Display d = new Display();
   final Shell shell = new Shell(d);
   shell.setSize(250, 200);
   shell.setLayout(new FillLayout());
   // Create a canvas
   Canvas canvas = new Canvas(shell, SWT.NONE);
   canvas.addPaintListener(new PaintListener() {
     public void paintControl(PaintEvent e) {
       // Do some drawing
       Rectangle rect = ((Canvas) e.widget).getBounds();
       e.gc.setForeground(e.display.getSystemColor(SWT.COLOR_RED));
       e.gc.drawFocus(5, 5, rect.width - 10, rect.height - 10);
       e.gc.drawText("www.jexp.ru", 5, 50);
     }
   });    
   
   
   shell.open();
   while (!shell.isDisposed()) {
     if (!d.readAndDispatch())
       d.sleep();
   }
   d.dispose();
 }

} 

      </source>



GC: fillArc(int x, int y, int width, int height, int startAngle, int endAngle)

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.events.PaintEvent; import org.eclipse.swt.events.PaintListener; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Canvas; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class MainClass { 

 public static void main(String[] a) {
   final Display d = new Display();
   final Shell shell = new Shell(d);
   shell.setSize(250, 200);
   shell.setLayout(new FillLayout());
   Canvas drawingCanvas = new Canvas(shell, SWT.NONE);
   drawingCanvas.addPaintListener(new ArcExamplePaintListener());
   
   shell.open();
   while (!shell.isDisposed()) {
     if (!d.readAndDispatch())
       d.sleep();
   }
   d.dispose();
 }

} class ArcExamplePaintListener implements PaintListener { 

 public void paintControl(PaintEvent e) {
   Canvas canvas = (Canvas) e.widget;
   int x = canvas.getBounds().width;
   int y = canvas.getBounds().height;
   e.gc.setBackground(e.display.getSystemColor(SWT.COLOR_BLACK));
   e.gc.fillArc((x - 200) / 2, (y - 200) / 2, 200, 200, 0, 90);
 }

} 

      </source>



GC: setBackground(Color c)

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.events.PaintEvent; import org.eclipse.swt.events.PaintListener; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Canvas; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class MainClass { 

 public static void main(String[] a) {
   final Display d = new Display();
   final Shell shell = new Shell(d);
   shell.setSize(250, 200);
   shell.setLayout(new FillLayout());
   Canvas drawingCanvas = new Canvas(shell, SWT.NONE);
   drawingCanvas.addPaintListener(new ArcExamplePaintListener());
   
   shell.open();
   while (!shell.isDisposed()) {
     if (!d.readAndDispatch())
       d.sleep();
   }
   d.dispose();
 }

} class ArcExamplePaintListener implements PaintListener { 

 public void paintControl(PaintEvent e) {
   Canvas canvas = (Canvas) e.widget;
   int x = canvas.getBounds().width;
   int y = canvas.getBounds().height;
   e.gc.setBackground(e.display.getSystemColor(SWT.COLOR_BLACK));
   e.gc.fillArc((x - 200) / 2, (y - 200) / 2, 200, 200, 0, 90);
 }

} 

      </source>



GC: setFont(Font f)

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.events.PaintEvent; import org.eclipse.swt.events.PaintListener; import org.eclipse.swt.graphics.Font; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Canvas; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class MainClass { 

 public static void main(String[] a) {
   final Display display = new Display();
   final Shell shell = new Shell(display);
   shell.setSize(250, 200);
   shell.setLayout(new FillLayout());
   // Create a canvas
   Canvas canvas = new Canvas(shell, SWT.NONE);
   canvas.addPaintListener(new PaintListener() {
     public void paintControl(PaintEvent e) {
       e.gc.setFont(new Font(display, "Helvetica", 18, SWT.NORMAL));
       e.gc.drawText("www.jexp.ru", 0, 0);
     }
   });    
   
   
   shell.open();
   while (!shell.isDisposed()) {
     if (!display.readAndDispatch())
       display.sleep();
   }
   display.dispose();
 }

} 


      </source>



GC: setLineWidth(int w)

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.events.PaintEvent; import org.eclipse.swt.events.PaintListener; import org.eclipse.swt.graphics.Rectangle; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Canvas; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class MainClass { 

 public static void main(String[] a) {
   final Display d = new Display();
   final Shell shell = new Shell(d);
   shell.setSize(250, 200);
   shell.setLayout(new FillLayout());
   // Create a canvas
   Canvas canvas = new Canvas(shell, SWT.NONE);
   canvas.addPaintListener(new PaintListener() {
     public void paintControl(PaintEvent e) {
       e.gc.setLineWidth(10);
       e.gc.drawLine(0, 0, 100, 100);
     }
   });    
   
   
   shell.open();
   while (!shell.isDisposed()) {
     if (!d.readAndDispatch())
       d.sleep();
   }
   d.dispose();
 }

} 


      </source>
Источник — «http://www.jexp.ru/index.php?title=Java_by_API/org.eclipse.swt.graphics/GC&oldid=864»