basictabbedpaneui.java

JAVA的一些源码 JAVA2 STANDARD EDITION DEVELOPMENT KIT 5.0

        yp[pcnt++] = end;
        xp[pcnt] = ostart;
        yp[pcnt++] = start;
        for(int i = 0; i < rcnt; i++) {
            for(int j = 0; j < xCropLen.length; j++) {
                xp[pcnt] = cropline - xCropLen[j];
                yp[pcnt] = start + (i*CROP_SEGMENT) + yCropLen[j];
                if (yp[pcnt] >= end) {
                    yp[pcnt] = end;
                    pcnt++;
                    break;
                }
                pcnt++;
            }                           
        }
        if (tabPlacement == JTabbedPane.TOP || tabPlacement == JTabbedPane.BOTTOM) {
           return new Polygon(xp, yp, pcnt);

        } else { // LEFT or RIGHT
           return new Polygon(yp, xp, pcnt);
        }           
    }

    /* If tabLayoutPolicy == SCROLL_TAB_LAYOUT, this method will paint an edge
     * indicating the tab is cropped in the viewport display
     */
    private void paintCroppedTabEdge(Graphics g, int tabPlacement, int tabIndex, 
                                     boolean isSelected,
                                     int x, int y) {
        switch(tabPlacement) {
          case LEFT:
          case RIGHT:
            int xx = x;
            g.setColor(shadow);
            while(xx <= x+rects[tabIndex].width) {
                for (int i=0; i < xCropLen.length; i+=2) {
                    g.drawLine(xx+yCropLen[i],y-xCropLen[i],
                               xx+yCropLen[i+1]-1,y-xCropLen[i+1]);
                }
                xx+=CROP_SEGMENT;
            }       
            break;
          case TOP:
          case BOTTOM:
          default:
            int yy = y;       
            g.setColor(shadow);
            while(yy <= y+rects[tabIndex].height) {
                for (int i=0; i < xCropLen.length; i+=2) {
                    g.drawLine(x-xCropLen[i],yy+yCropLen[i],
                               x-xCropLen[i+1],yy+yCropLen[i+1]-1);
                }
                yy+=CROP_SEGMENT;
            }       
        }
    }

    protected void layoutLabel(int tabPlacement, 
                               FontMetrics metrics, int tabIndex,
                               String title, Icon icon,
                               Rectangle tabRect, Rectangle iconRect, 
                               Rectangle textRect, boolean isSelected ) {
        textRect.x = textRect.y = iconRect.x = iconRect.y = 0;

        View v = getTextViewForTab(tabIndex);
        if (v != null) {
            tabPane.putClientProperty("html", v);
        }

        SwingUtilities.layoutCompoundLabel((JComponent) tabPane,
                                           metrics, title, icon,
                                           SwingUtilities.CENTER,
                                           SwingUtilities.CENTER,
                                           SwingUtilities.CENTER,
                                           SwingUtilities.TRAILING,
                                           tabRect,
                                           iconRect,
                                           textRect,
                                           textIconGap);

        tabPane.putClientProperty("html", null);

        int xNudge = getTabLabelShiftX(tabPlacement, tabIndex, isSelected);
        int yNudge = getTabLabelShiftY(tabPlacement, tabIndex, isSelected);
        iconRect.x += xNudge;
        iconRect.y += yNudge;
        textRect.x += xNudge;
        textRect.y += yNudge;
    }

    protected void paintIcon(Graphics g, int tabPlacement,
                             int tabIndex, Icon icon, Rectangle iconRect, 
                             boolean isSelected ) {
        if (icon != null) {
            icon.paintIcon(tabPane, g, iconRect.x, iconRect.y);
        }
    }

    protected void paintText(Graphics g, int tabPlacement,
                             Font font, FontMetrics metrics, int tabIndex,
                             String title, Rectangle textRect, 
                             boolean isSelected) {

        g.setFont(font);

        View v = getTextViewForTab(tabIndex);
        if (v != null) {
            // html
            v.paint(g, textRect);
        } else {
            // plain text
            int mnemIndex = tabPane.getDisplayedMnemonicIndexAt(tabIndex);

            if (tabPane.isEnabled() && tabPane.isEnabledAt(tabIndex)) {
                Color fg = tabPane.getForegroundAt(tabIndex);
                if (isSelected && (fg instanceof UIResource)) {
                    Color selectedFG = UIManager.getColor(
                                  "TabbedPane.selectedForeground");
                    if (selectedFG != null) {
                        fg = selectedFG;
                    }
                }
                g.setColor(fg);
                SwingUtilities2.drawStringUnderlineCharAt(tabPane, g,
                             title, mnemIndex,
                             textRect.x, textRect.y + metrics.getAscent());
                
            } else { // tab disabled
                g.setColor(tabPane.getBackgroundAt(tabIndex).brighter());
                SwingUtilities2.drawStringUnderlineCharAt(tabPane, g,
                             title, mnemIndex,
                             textRect.x, textRect.y + metrics.getAscent());
                g.setColor(tabPane.getBackgroundAt(tabIndex).darker());
                SwingUtilities2.drawStringUnderlineCharAt(tabPane, g,
                             title, mnemIndex,
                             textRect.x - 1, textRect.y + metrics.getAscent() - 1);

            }
        }
    } 


    protected int getTabLabelShiftX(int tabPlacement, int tabIndex, boolean isSelected) {
        Rectangle tabRect = rects[tabIndex];
        int nudge = 0;
        switch(tabPlacement) {
          case LEFT:
              nudge = isSelected? -1 : 1;
              break;
          case RIGHT:
              nudge = isSelected? 1 : -1;
              break;
          case BOTTOM:
          case TOP:
          default:
              nudge = tabRect.width % 2;
        }
        return nudge;
    }

    protected int getTabLabelShiftY(int tabPlacement, int tabIndex, boolean isSelected) {
        Rectangle tabRect = rects[tabIndex];
        int nudge = 0;
        switch(tabPlacement) {
           case BOTTOM:
              nudge = isSelected? 1 : -1;
              break;
          case LEFT:
          case RIGHT:
              nudge = tabRect.height % 2;
              break;
          case TOP:
          default:
              nudge = isSelected? -1 : 1;;
        }
        return nudge;
    }

    protected void paintFocusIndicator(Graphics g, int tabPlacement,
                                       Rectangle[] rects, int tabIndex, 
                                       Rectangle iconRect, Rectangle textRect,
                                       boolean isSelected) {
        Rectangle tabRect = rects[tabIndex];
        if (tabPane.hasFocus() && isSelected) {
            int x, y, w, h;
            g.setColor(focus);
            switch(tabPlacement) {
              case LEFT:
                  x = tabRect.x + 3;
                  y = tabRect.y + 3;
                  w = tabRect.width - 5;
                  h = tabRect.height - 6;
                  break;
              case RIGHT:
                  x = tabRect.x + 2;
                  y = tabRect.y + 3;
                  w = tabRect.width - 5;
                  h = tabRect.height - 6;
                  break;
              case BOTTOM:
                  x = tabRect.x + 3;
                  y = tabRect.y + 2;
                  w = tabRect.width - 6;
                  h = tabRect.height - 5;
                  break;
              case TOP:
              default:
                  x = tabRect.x + 3;
                  y = tabRect.y + 3;
                  w = tabRect.width - 6;
                  h = tabRect.height - 5;
            }
            BasicGraphicsUtils.drawDashedRect(g, x, y, w, h);
        }
    }

    /**
      * this function draws the border around each tab
      * note that this function does now draw the background of the tab.
      * that is done elsewhere
      */
    protected void paintTabBorder(Graphics g, int tabPlacement,
                                  int tabIndex,
                                  int x, int y, int w, int h, 
                                  boolean isSelected ) {
        g.setColor(lightHighlight);  

        switch (tabPlacement) {
          case LEFT:
              g.drawLine(x+1, y+h-2, x+1, y+h-2); // bottom-left highlight
              g.drawLine(x, y+2, x, y+h-3); // left highlight
              g.drawLine(x+1, y+1, x+1, y+1); // top-left highlight
              g.drawLine(x+2, y, x+w-1, y); // top highlight

              g.setColor(shadow);
              g.drawLine(x+2, y+h-2, x+w-1, y+h-2); // bottom shadow

              g.setColor(darkShadow);
              g.drawLine(x+2, y+h-1, x+w-1, y+h-1); // bottom dark shadow
              break;
          case RIGHT:
              g.drawLine(x, y, x+w-3, y); // top highlight

              g.setColor(shadow);
              g.drawLine(x, y+h-2, x+w-3, y+h-2); // bottom shadow
              g.drawLine(x+w-2, y+2, x+w-2, y+h-3); // right shadow

              g.setColor(darkShadow);
              g.drawLine(x+w-2, y+1, x+w-2, y+1); // top-right dark shadow
              g.drawLine(x+w-2, y+h-2, x+w-2, y+h-2); // bottom-right dark shadow
              g.drawLine(x+w-1, y+2, x+w-1, y+h-3); // right dark shadow
              g.drawLine(x, y+h-1, x+w-3, y+h-1); // bottom dark shadow
              break;              
          case BOTTOM:
              g.drawLine(x, y, x, y+h-3); // left highlight
              g.drawLine(x+1, y+h-2, x+1, y+h-2); // bottom-left highlight

              g.setColor(shadow);
              g.drawLine(x+2, y+h-2, x+w-3, y+h-2); // bottom shadow
              g.drawLine(x+w-2, y, x+w-2, y+h-3); // right shadow

              g.setColor(darkShadow);
              g.drawLine(x+2, y+h-1, x+w-3, y+h-1); // bottom dark shadow
              g.drawLine(x+w-2, y+h-2, x+w-2, y+h-2); // bottom-right dark shadow
              g.drawLine(x+w-1, y, x+w-1, y+h-3); // right dark shadow
              break;
          case TOP:
          default:           
              g.drawLine(x, y+2, x, y+h-1); // left highlight
              g.drawLine(x+1, y+1, x+1, y+1); // top-left highlight
              g.drawLine(x+2, y, x+w-3, y); // top highlight              

              g.setColor(shadow);  
              g.drawLine(x+w-2, y+2, x+w-2, y+h-1); // right shadow

              g.setColor(darkShadow); 
              g.drawLine(x+w-1, y+2, x+w-1, y+h-1); // right dark-shadow
              g.drawLine(x+w-2, y+1, x+w-2, y+1); // top-right shadow
        }
    }

    protected void paintTabBackground(Graphics g, int tabPlacement,
                                      int tabIndex,
                                      int x, int y, int w, int h, 
                                      boolean isSelected ) {
        g.setColor(!isSelected || selectedColor == null? 
                   tabPane.getBackgroundAt(tabIndex) : selectedColor);
        switch(tabPlacement) {
          case LEFT:
              g.fillRect(x+1, y+1, w-1, h-3);
              break;
          case RIGHT:
              g.fillRect(x, y+1, w-2, h-3);
              break;
          case BOTTOM:
              g.fillRect(x+1, y, w-3, h-1);
              break;
          case TOP:
          default:
              g.fillRect(x+1, y+1, w-3, h-1);
        }
    }

    protected void paintContentBorder(Graphics g, int tabPlacement, int selectedIndex) {
        int width = tabPane.getWidth();
        int height = tabPane.getHeight();
        Insets insets = tabPane.getInsets();
        Insets tabAreaInsets = getTabAreaInsets(tabPlacement);

        int x = insets.left;
        int y = insets.top;
        int w = width - insets.right - insets.left;
        int h = height - insets.top - insets.bottom;

        switch(tabPlacement) {
          case LEFT:
              x += calculateTabAreaWidth(tabPlacement, runCount, maxTabWidth);
	      if (tabsOverlapBorder) {
		  x -= tabAreaInsets.right;
	      }
              w -= (x - insets.left);
              break;
          case RIGHT:
              w -= calculateTabAreaWidth(tabPlacement, runCount, maxTabWidth);
	      if (tabsOverlapBorder) {
		  w += tabAreaInsets.left;
	      }
              break;            
          case BOTTOM: 
              h -= calculateTabAreaHeight(tabPlacement, runCount, maxTabHeight);
	      if (tabsOverlapBorder) {
		  h += tabAreaInsets.top;
	      }
              break;
          case TOP:
          default:
              y += calculateTabAreaHeight(tabPlacement, runCount, maxTabHeight);
	      if (tabsOverlapBorder) {
		  y -= tabAreaInsets.bottom;
	      }
              h -= (y - insets.top);
        } 

        if (contentOpaque || tabPane.isOpaque()) {
            // Fill region behind content area
            Color color = UIManager.getColor("TabbedPane.contentAreaColor");
            if (color != null) {
                g.setColor(color);
            }
            else if (selectedColor == null) {
                g.setColor(tabPane.getBackground());
            }
            else {
                g.setColor(selectedColor);
            }
            g.fillRect(x,y,w,h);
        }

        paintContentBorderTopEdge(g, tabPlacement, selectedIndex, x, y, w, h);
        paintContentBorderLeftEdge(g, tabPlacement, selectedIndex, x, y, w, h); 
        paintContentBorderBottomEdge(g, tabPlacement, selectedIndex, x, y, w, h);
        paintContentBorderRightEdge(g, tabPlacement, selectedIndex, x, y, w, h); 

    }
         
    protected void paintContentBorderTopEdge(Graphics g, int tabPlacement,
                                         int selectedIndex, 
                                         int x, int y, int w, int h) {