Test case for ticket #2470.

svn changeset:6612/svn branch:trunk

diff --git a/src/com/itmill/toolkit/tests/tickets/Ticket2470.java b/src/com/itmill/toolkit/tests/tickets/Ticket2470.java
new file mode 100644 (file)
index 0000000..633384d
--- /dev/null
+++ b/src/com/itmill/toolkit/tests/tickets/Ticket2470.java
@@ -0,0 +1,112 @@
+package com.itmill.toolkit.tests.tickets;
+
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.image.BufferedImage;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+import javax.imageio.ImageIO;
+
+import com.itmill.toolkit.Application;
+import com.itmill.toolkit.terminal.StreamResource;
+import com.itmill.toolkit.ui.Button;
+import com.itmill.toolkit.ui.Embedded;
+import com.itmill.toolkit.ui.Window;
+import com.itmill.toolkit.ui.Button.ClickEvent;
+
+public class Ticket2470 extends Application {
+
+    @Override
+    public void init() {
+        final Window main = new Window();
+        setMainWindow(main);
+        
+        final Embedded embedded = new Embedded();
+        embedded.setDescription("Click on the grid cells to switch them.");
+
+        final MyImageSource imageSource = new MyImageSource();
+        final StreamResource imageResource = new StreamResource(imageSource, "testimage.png", this);
+        imageResource.setCacheTime(0);
+        embedded.setSource(imageResource);
+        
+        main.addComponent(embedded);
+        
+        Button button = new Button ("Click to Update");
+        button.addListener(new Button.ClickListener() {
+           @Override
+            public void buttonClick(ClickEvent event) {
+               embedded.requestRepaint();
+            } 
+        });
+        main.addComponent(button);
+    }
+
+    public class MyImageSource implements StreamResource.StreamSource {
+        public MyImageSource() {
+        }
+        
+        int intervalPos(int pos, int resolution, int cells) {
+                return (int) Math.round(pos*resolution/(cells*1.0));
+        }
+
+        public InputStream getStream() {
+            // Create an image and draw some background on it.
+            BufferedImage image = new BufferedImage (640, 480, BufferedImage.TYPE_INT_RGB);
+            Graphics drawable = image.getGraphics();
+                
+                // Background
+                drawable.setColor(Color.white);
+                drawable.fillRect(0, 0, 640, 480);
+                
+                final int rows = 10;
+                final int cols = 10;
+
+                // Grid
+                for (int row=0; row<rows; row++) {
+                        int gridy     = intervalPos(row,   480, rows);
+                        int gridynext = intervalPos(row+1, 480, rows);
+                        
+                        // Horizontal grid line
+                        if (row > 0) {
+                                drawable.setColor(Color.lightGray);
+                                drawable.drawLine(0, gridy, 640-1, gridy);
+                        }
+                        
+                        for (int col=0; col<cols; col++) {
+                                int gridx     = intervalPos(col,   640, cols);
+                                int gridxnext = intervalPos(col+1, 640, cols);
+                                
+                                // Vertical grid line
+                                if (row == 0 && col > 0) {
+                                        drawable.setColor(Color.lightGray);
+                                        drawable.drawLine(gridx, 0, gridx, 480-1);
+                                }
+
+                                // Cell
+                                if (Math.random() < 0.5f) {
+                                    drawable.setColor(Color.white);
+                                } else {
+                                    drawable.setColor(Color.black);
+                                }
+                                drawable.fillRect(gridx+1, gridy+1, gridxnext-gridx-1, gridynext-gridy-1);
+                        }
+                }
+                
+                try {
+                    // Write the image to a buffer.
+                    ByteArrayOutputStream imagebuffer = new ByteArrayOutputStream();
+                    ImageIO.write(image, "png", imagebuffer);
+
+                    // Return a stream from the buffer.
+                    ByteArrayInputStream istream = new ByteArrayInputStream(imagebuffer.toByteArray());
+                    return istream; //new DownloadStream (istream,null,null);
+                } catch (IOException e) {
+                    return null;
+                }
+                }
+
+    }
+}