synthtreeui.java

JAVA的一些源码 JAVA2 STANDARD EDITION DEVELOPMENT KIT 5.0

		    if (isLeaf) {
			isExpanded = hasBeenExpanded = false;
                    }
		    else {
			isExpanded = treeState.getExpandedState(path);
			hasBeenExpanded = tree.hasBeenExpanded(path);
		    }
		    bounds = treeState.getBounds(path, boundsBuffer);
                    adjustCellBounds(tree, bounds, insets);
		    // See if the vertical line to the parent has been drawn.
		    parentPath = path.getParentPath();
		    if (parentPath != null) {
			if (drawingCache.get(parentPath) == null) {
                            paintVerticalPartOfLeg(g, paintBounds, insets,
                                                   parentPath);
			    drawingCache.put(parentPath, Boolean.TRUE);
			}
			paintHorizontalPartOfLeg(g,
                                                 paintBounds, insets, bounds,
                                                 path, row, isExpanded,
						 hasBeenExpanded, isLeaf);
		    }
		    else if (rootVisible && row == 0) {
			paintHorizontalPartOfLeg(g,
                                                 paintBounds, insets, bounds,
                                                 path, row, isExpanded,
						 hasBeenExpanded, isLeaf);
		    }
		    if (shouldPaintExpandControl(path, row, isExpanded,
                                                 hasBeenExpanded, isLeaf)) {
			paintExpandControl(g, paintBounds,
                                           insets, bounds, path, row,
                                           isExpanded, hasBeenExpanded,isLeaf);
		    }
		    if ((bounds.y + bounds.height) >= endY) {
			done = true;
                    }
		}
		else {
		    done = true;
		}
		row++;
	    }
	}
        cellContext.dispose();
	// Empty out the renderer pane, allowing renderers to be gc'ed.
	rendererPane.removeAll();
    }

    private void configureRenderer(SynthContext context) {
        TreeCellRenderer renderer = tree.getCellRenderer();

        if (renderer instanceof DefaultTreeCellRenderer) {
            DefaultTreeCellRenderer r = (DefaultTreeCellRenderer)renderer;
            SynthStyle style = context.getStyle();

            context.setComponentState(ENABLED | SELECTED);
            Color color = r.getTextSelectionColor();
            if (color == null || (color instanceof UIResource)) {
                r.setTextSelectionColor(style.getColor(
                                     context, ColorType.TEXT_FOREGROUND));
            }
            color = r.getBackgroundSelectionColor();
            if (color == null || (color instanceof UIResource)) {
                r.setBackgroundSelectionColor(style.getColor(
                                        context, ColorType.TEXT_BACKGROUND));
            }

            context.setComponentState(ENABLED);
            color = r.getTextNonSelectionColor();
            if (color == null || color instanceof UIResource) {
                r.setTextNonSelectionColor(style.getColor(
                                        context, ColorType.TEXT_FOREGROUND));
            }
            color = r.getBackgroundNonSelectionColor();
            if (color instanceof UIResource) {
                r.setBackgroundNonSelectionColor(style.getColor(
                                  context, ColorType.TEXT_BACKGROUND));
            }
        }
    }

    protected void paintHorizontalPartOfLeg(Graphics g, Rectangle clipBounds,
					    Insets insets, Rectangle bounds,
					    TreePath path, int row,
					    boolean isExpanded,
					    boolean hasBeenExpanded, boolean
					    isLeaf) {
        if (drawHorizontalLines) {
            super.paintHorizontalPartOfLeg(g, clipBounds, insets, bounds,
                                           path, row, isExpanded,
                                           hasBeenExpanded, isLeaf);
        }
    }

    protected void paintHorizontalLine(Graphics g, JComponent c, int y,
				      int left, int right) {
        paintContext.getStyle().getGraphicsUtils(paintContext).drawLine(
            paintContext, "Tree.horizontalLine", g, left, y, right, y);
    }

    protected void paintVerticalPartOfLeg(Graphics g,
                                          Rectangle clipBounds, Insets insets,
                                          TreePath path) {
        if (drawVerticalLines) {
            super.paintVerticalPartOfLeg(g, clipBounds, insets, path);
        }
    }

    protected void paintVerticalLine(Graphics g, JComponent c, int x, int top,
				    int bottom) {
        paintContext.getStyle().getGraphicsUtils(paintContext).drawLine(
            paintContext, "Tree.verticalLine", g, x, top, x, bottom);
    }

    protected void paintRow(TreeCellRenderer renderer,
               DefaultTreeCellRenderer dtcr, SynthContext treeContext,
               SynthContext cellContext, Graphics g, Rectangle clipBounds,
               Insets insets, Rectangle bounds, Rectangle rowBounds,
               TreePath path, int row, boolean isExpanded,
               boolean hasBeenExpanded, boolean isLeaf) {
	// Don't paint the renderer if editing this row.
        boolean selected = tree.isRowSelected(row);

        if (selected) {
            cellContext.setComponentState(ENABLED | SELECTED);
        }
        else {
            cellContext.setComponentState(ENABLED);
        }
        if (dtcr != null && (dtcr.getBorderSelectionColor() instanceof
                             UIResource)) {
            dtcr.setBorderSelectionColor(style.getColor(
                                             cellContext, ColorType.FOCUS));
        }
        SynthLookAndFeel.updateSubregion(cellContext, g, rowBounds);
        cellContext.getPainter().paintTreeCellBackground(cellContext, g,
                    rowBounds.x, rowBounds.y, rowBounds.width,
                    rowBounds.height);
        cellContext.getPainter().paintTreeCellBorder(cellContext, g,
                    rowBounds.x, rowBounds.y, rowBounds.width,
                    rowBounds.height);
	if (editingComponent != null && editingRow == row) {
	    return;
        }

	int leadIndex;

	if (tree.hasFocus()) {
	    leadIndex = leadRow;
	}
	else {
	    leadIndex = -1;
        }

	Component component = renderer.getTreeCellRendererComponent(
                         tree, path.getLastPathComponent(),
                         selected, isExpanded, isLeaf, row,
                         (leadIndex == row));

	rendererPane.paintComponent(g, component, tree, bounds.x, bounds.y,
				    bounds.width, bounds.height, true);
    }

    protected void drawCentered(Component c, Graphics graphics, Icon icon,
				int x, int y) {
        int w = SynthIcon.getIconWidth(icon, paintContext);
        int h = SynthIcon.getIconHeight(icon, paintContext);

	SynthIcon.paintIcon(icon, paintContext, graphics, x - w/2, y - h/2, w,
                            h);
    }

    public void propertyChange(PropertyChangeEvent event) {
        if (SynthLookAndFeel.shouldUpdateStyle(event)) {
            updateStyle((JTree)event.getSource());
        }
    }

    protected int getRowX(int row, int depth) {
        return super.getRowX(row, depth) + padding;
    }


    private class SynthTreeCellRenderer extends DefaultTreeCellRenderer
                               implements UIResource {
        SynthTreeCellRenderer() {
        }
        public String getName() {
            return "Tree.cellRenderer";
        }
        public Component getTreeCellRendererComponent(JTree tree, Object value,
                                                      boolean sel,
                                                      boolean expanded,
                                                      boolean leaf, int row,
                                                      boolean hasFocus) {
            if (!useTreeColors && (sel || hasFocus)) {
                SynthLookAndFeel.setSelectedUI((SynthLabelUI)SynthLookAndFeel.
                             getUIOfType(getUI(), SynthLabelUI.class),
                                   sel, hasFocus, tree.isEnabled());
            }
            else {
                SynthLookAndFeel.resetSelectedUI();
            }
            return super.getTreeCellRendererComponent(tree, value, sel,
                                                      expanded, leaf, row, hasFocus);
        }
        public void paint(Graphics g) {
            paintComponent(g);
            if (hasFocus) {
                SynthContext context = getContext(tree, Region.TREE_CELL);

                if (context.getStyle() == null) {
                    assert false: "SynthTreeCellRenderer is being used " +
                        "outside of UI that created it";
                    return;
                }
                int imageOffset = 0;
                Icon currentI = getIcon();

                if(currentI != null && getText() != null) {
                    imageOffset = currentI.getIconWidth() +
                                          Math.max(0, getIconTextGap() - 1);
                }
                if (selected) {
                    context.setComponentState(ENABLED | SELECTED);
                }
                else {
                    context.setComponentState(ENABLED);
                }
                if(getComponentOrientation().isLeftToRight()) {
                    context.getPainter().paintTreeCellFocus(context, g,
                            imageOffset, 0, getWidth() - imageOffset,
                            getHeight());
                }
                else {
                    context.getPainter().paintTreeCellFocus(context, g,
                            0, 0, getWidth() - imageOffset, getHeight());
                }
                context.dispose();
            }
            SynthLookAndFeel.resetSelectedUI();
        }
    }


    private static class SynthTreeCellEditor extends DefaultTreeCellEditor {
        public SynthTreeCellEditor(JTree tree,
                                   DefaultTreeCellRenderer renderer) {
            super(tree, renderer);
            setBorderSelectionColor(null);
        }

        protected TreeCellEditor createTreeCellEditor() {
            JTextField tf = new JTextField() {
                public String getName() {
                    return "Tree.cellEditor";
                }
            };
            DefaultCellEditor editor = new DefaultCellEditor(tf);

            // One click to edit.
            editor.setClickCountToStart(1);
            return editor;
        }
    }


    //
    // BasicTreeUI directly uses expandIcon outside of the Synth methods.
    // To get the correct context we return an instance of this that fetches
    // the SynthContext as needed.
    //
    private class ExpandedIconWrapper extends SynthIcon {
        public void paintIcon(SynthContext context, Graphics g, int x,
                              int y, int w, int h) {
            if (context == null) {
                context = getContext(tree);
                SynthIcon.paintIcon(expandedIcon, context, g, x, y, w, h);
                context.dispose();
            }
            else {
                SynthIcon.paintIcon(expandedIcon, context, g, x, y, w, h);
            }
        }

        public int getIconWidth(SynthContext context) {
            int width;
            if (context == null) {
                context = getContext(tree);
                width = SynthIcon.getIconWidth(expandedIcon, context);
                context.dispose();
            }
            else {
                width = SynthIcon.getIconWidth(expandedIcon, context);
            }
            return width;
        }

        public int getIconHeight(SynthContext context) {
            int height;
            if (context == null) {
                context = getContext(tree);
                height = SynthIcon.getIconHeight(expandedIcon, context);
                context.dispose();
            }
            else {
                height = SynthIcon.getIconHeight(expandedIcon, context);
            }
            return height;
        }
    }
}