5 files changed, 30 insertions, 5 deletions
diff --git a/src/se/liu/gusso230/tetris/Board.java b/src/se/liu/gusso230/tetris/Board.java
index 3d1d8d0..dba539a 100644
--- a/src/se/liu/gusso230/tetris/Board.java
+++ b/src/se/liu/gusso230/tetris/Board.java
@@ -27,6 +27,7 @@ public class Board {
     private int fallingX;
     private int fallingY;
     private int points = 0;
+    private int lineStreak = 0;
 
     private HighscoreList highscores;
     private File highscoreFile;
@@ -35,7 +36,7 @@ public class Board {
     private int timerDelay;
     private List<BoardListener> boardListeners;
 
-    private FallHandler fallHandler = new Fallthrough();
+    private FallHandler fallHandler = new DefaultFallHandler();
 
     private final static Random RND = new Random();
 
@@ -80,6 +81,7 @@ public class Board {
                 moveFalling();
             }
             checkFullLines();
+            updateFallHandler();
         }
     }
 
@@ -191,7 +193,7 @@ public class Board {
 
     private void checkFullLines() {
         int y = height - 1;
-        int clearedLines = 0;
+        int linesCleared = 0;
         while (y >= 0) {
             boolean hole = false;
             for (int x = 0; x < width; x++) {
@@ -203,11 +205,11 @@ public class Board {
             if (hole) {
                 y--;
             } else {
-                clearedLines++;
+                linesCleared++;
                 moveDownFrom(y);
             }
         }
-        switch (clearedLines) {
+        switch (linesCleared) {
             case 1:
                 points += POINTS_ONE_LINE;
                 break;
@@ -223,12 +225,21 @@ public class Board {
             default:
                 break;
         }
-        if (clearedLines > 0) {
+        if (linesCleared > 0) {
             timerDelay = (int) (timerDelay * 0.95);
             timer.setDelay(timerDelay);
         }
     }
 
+    private void updateFallHandler() {
+        if (lineStreak >= 4) {
+            fallHandler = new Fallthrough();
+            lineStreak -= 4;
+        } else {
+            fallHandler = new DefaultFallHandler();
+        }
+    }
+
     private void moveDownFrom(int line) {
         for (int y = line; y > 0; y--) {  // > since we dont want to copy into the top line
             for (int x = 0; x < width; x++) {
@@ -289,6 +300,10 @@ public class Board {
         return highscores.getHighscores();
    }
 
+    public String getPowerupDescription() {
+        return fallHandler.getDescription();
+    }
+
     public void setFalling(final Poly falling) {
         this.falling = falling;
         notifyListeners();
diff --git a/src/se/liu/gusso230/tetris/DefaultFallHandler.java b/src/se/liu/gusso230/tetris/DefaultFallHandler.java
index 180d8f4..dcf86a8 100644
--- a/src/se/liu/gusso230/tetris/DefaultFallHandler.java
+++ b/src/se/liu/gusso230/tetris/DefaultFallHandler.java
@@ -5,6 +5,10 @@ public class DefaultFallHandler implements FallHandler {
         return !board.getFalling().onlyCoversEmpty(board.getFallingX(), board.getFallingY(), board);
     }
 
+    @Override public boolean isRepeatable() {
+        return true;
+    }
+
     @Override public String getDescription() {
         return "No powerup";
     }
diff --git a/src/se/liu/gusso230/tetris/FallHandler.java b/src/se/liu/gusso230/tetris/FallHandler.java
index ed21d33..682d37f 100644
--- a/src/se/liu/gusso230/tetris/FallHandler.java
+++ b/src/se/liu/gusso230/tetris/FallHandler.java
@@ -2,5 +2,6 @@ package se.liu.gusso230.tetris;
 
 public interface FallHandler {
     boolean hasFallingCollision(Board board);
+    boolean isRepeatable();
     String getDescription();
 }
diff --git a/src/se/liu/gusso230/tetris/Fallthrough.java b/src/se/liu/gusso230/tetris/Fallthrough.java
index add19fc..cf3d3c7 100644
--- a/src/se/liu/gusso230/tetris/Fallthrough.java
+++ b/src/se/liu/gusso230/tetris/Fallthrough.java
@@ -5,6 +5,10 @@ public class Fallthrough implements FallHandler {
         return !board.getFalling().isAtOrAbove(board.getFallingY(), board.getHeight());
     }
 
+    @Override public boolean isRepeatable() {
+        return false;
+    }
+
     @Override public String getDescription() {
         return "Fallthrough";
     }
diff --git a/src/se/liu/gusso230/tetris/TetrisComponent.java b/src/se/liu/gusso230/tetris/TetrisComponent.java
index 9240f69..0ada2e8 100644
--- a/src/se/liu/gusso230/tetris/TetrisComponent.java
+++ b/src/se/liu/gusso230/tetris/TetrisComponent.java
@@ -71,6 +71,7 @@ public class TetrisComponent extends JComponent implements BoardListener {
                 g.setColor(Color.BLACK);
                 g.setFont(new Font("serif", Font.PLAIN, 22));
                 g.drawString(Integer.toString(board.getPoints()), LEFT_MARGIN, LINE_HEIGHT);
+                g.drawString(board.getPowerupDescription(), LEFT_MARGIN, TILE_SIZE * board.getHeight() + (2 * TILE_SIZE) + LINE_HEIGHT);
                 break;
             case SHOWING_HIGHSCORES:
                 List<Highscore> highscores = board.getHighscores();