src/java.desktop/share/classes/javax/swing/plaf/synth/SynthProgressBarUI.java

*** 47,56 ****
--- 47,58 ----
      private int progressPadding;
      private boolean rotateText; // added for Nimbus LAF
      private boolean paintOutsideClip;
      private boolean tileWhenIndeterminate; //whether to tile indeterminate painting
      private int tileWidth; //the width of each tile
+     private Dimension minBarSize; // minimal visible bar size
+     private int glowWidth; // Glow around the bar foreground
  
      /**
       * Creates a new UI object for the given component.
       *
       * @param x component to create UI object for
*** 112,121 ****
--- 114,125 ----
                  tileWidth *= 0.857;
              } else if ("mini".equals(scaleKey)){
                  tileWidth *= 0.784;
              }
          }
+         minBarSize = (Dimension)style.get(context, "ProgressBar.minBarSize");
+         glowWidth = style.getInt(context, "ProgressBar.glowWidth", 0);
          context.dispose();
      }
  
      /**
       * {@inheritDoc}
*** 256,266 ****
                              - (pBarInsets.top + progressPadding
                               + pBarInsets.bottom + progressPadding);
  
                      if (!SynthLookAndFeel.isLeftToRight(pBar)) {
                          x = pBar.getWidth() - pBarInsets.right - width
!                                 - progressPadding;
                      }
                  } else {  // JProgressBar.VERTICAL
                      x = pBarInsets.left + progressPadding;
                      width = pBar.getWidth()
                              - (pBarInsets.left + progressPadding
--- 260,270 ----
                              - (pBarInsets.top + progressPadding
                               + pBarInsets.bottom + progressPadding);
  
                      if (!SynthLookAndFeel.isLeftToRight(pBar)) {
                          x = pBar.getWidth() - pBarInsets.right - width
!                                 - progressPadding - glowWidth;
                      }
                  } else {  // JProgressBar.VERTICAL
                      x = pBarInsets.left + progressPadding;
                      width = pBar.getWidth()
                              - (pBarInsets.left + progressPadding
*** 269,281 ****
                              - (pBarInsets.top + progressPadding
                               + pBarInsets.bottom + progressPadding)));
                      y = pBar.getHeight() - pBarInsets.bottom - height
                              - progressPadding;
  
!                     // When the progress bar is vertical we always paint
!                     // from bottom to top, not matter what the component
!                     // orientation is.
                  }
              }
          } else {
              boxRect = getBox(boxRect);
              x = boxRect.x + progressPadding;
--- 273,285 ----
                              - (pBarInsets.top + progressPadding
                               + pBarInsets.bottom + progressPadding)));
                      y = pBar.getHeight() - pBarInsets.bottom - height
                              - progressPadding;
  
!                     if (SynthLookAndFeel.isLeftToRight(pBar)) {
!                         y -= glowWidth;
!                     }
                  }
              }
          } else {
              boxRect = getBox(boxRect);
              x = boxRect.x + progressPadding;
*** 305,317 ****
--- 309,324 ----
                              context, g, x, i, width, tileWidth, pBar.getOrientation());
                  }
              }
              g.setClip(clip);
          } else {
+             if (minBarSize == null || (width >= minBarSize.width
+                     && height >= minBarSize.height)) {
                  context.getPainter().paintProgressBarForeground(context, g,
                          x, y, width, height, pBar.getOrientation());
              }
+         }
  
          if (pBar.isStringPainted()) {
              paintText(context, g, pBar.getString());
          }
      }