synthtreeui.java

Mobile 应用程序使用 Java Micro Edition (Java ME) 平台

        Insets insets = tree.getInsets();

        if (tree.getRowCount() == 0) {
            rect = new Rectangle(insets.left,
                                 insets.top,
                                 tree.getWidth() - insets.left - insets.right,
                                 0);
        } else {
            int row = tree.getRowForPath(path);
            TreeModel model = getModel();
            Object root = model.getRoot();

            if (path.getLastPathComponent() == root
                    && index >= model.getChildCount(root)) {

                rect = tree.getRowBounds(tree.getRowCount() - 1);
                rect.y = rect.y + rect.height;
                Rectangle xRect;

                if (!tree.isRootVisible()) {
                    xRect = tree.getRowBounds(0);
                } else if (model.getChildCount(root) == 0){
                    xRect = tree.getRowBounds(0);
                    xRect.x += totalChildIndent;
                    xRect.width -= totalChildIndent + totalChildIndent;
                } else {
                    TreePath lastChildPath = path.pathByAddingChild(
                        model.getChild(root, model.getChildCount(root) - 1));
                    xRect = tree.getPathBounds(lastChildPath);
                }

                rect.x = xRect.x;
                rect.width = xRect.width;
            } else {
                rect = tree.getPathBounds(path.pathByAddingChild(
                    model.getChild(path.getLastPathComponent(), index)));
            }
        }

        if (rect.y != 0) {
            rect.y--;
        }

        if (!ltr) {
            rect.x = rect.x + rect.width - 100;
        }

        rect.width = 100;
        rect.height = 2;

        return rect;
    }

    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.getColorForState(
                                        context, ColorType.TEXT_FOREGROUND));
            }
            color = r.getBackgroundNonSelectionColor();
            if (color == null || color instanceof UIResource) {
                r.setBackgroundNonSelectionColor(style.getColorForState(
                                  context, ColorType.TEXT_BACKGROUND));
            }
        }
    }

    @Override
    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);
        }
    }

    @Override
    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, linesStyle);
    }

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

    @Override
    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, linesStyle);
    }

    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);

        JTree.DropLocation dropLocation = (JTree.DropLocation)tree.getDropLocation();
        boolean isDrop = dropLocation != null
                         && dropLocation.getChildIndex() == -1
                         && path == dropLocation.getPath();

        int state = ENABLED;
        if (selected || isDrop) {
            state |= SELECTED;
        }

        if (tree.isFocusOwner() && row == leadRow) {
            state |= FOCUSED;
        }

        cellContext.setComponentState(state);

        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);
    }

    private int findCenteredX(int x, int iconWidth) {
        return tree.getComponentOrientation().isLeftToRight()
               ? x - (int)Math.ceil(iconWidth / 2.0)
               : x - (int)Math.floor(iconWidth / 2.0);
    }

    /**
     * @inheritDoc
     */
    @Override
    protected void paintExpandControl(Graphics g,
				      Rectangle clipBounds, Insets insets,
				      Rectangle bounds, TreePath path,
				      int row, boolean isExpanded,
				      boolean hasBeenExpanded,
				      boolean isLeaf) {
        //modify the paintContext's state to match the state for the row
        //this is a hack in that it requires knowledge of the subsequent
        //method calls. The point is, the context used in drawCentered
        //should reflect the state of the row, not of the tree.
        boolean isSelected = tree.getSelectionModel().isPathSelected(path);
        int state = paintContext.getComponentState();
        if (isSelected) {
            paintContext.setComponentState(state | SynthConstants.SELECTED);
        }
        super.paintExpandControl(g, clipBounds, insets, bounds, path, row,
                isExpanded, hasBeenExpanded, isLeaf);
        paintContext.setComponentState(state);
    }

    @Override
    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,
                            findCenteredX(x, w),
                            y - h/2, w, h);
    }

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

        if ("dropLocation" == event.getPropertyName()) {
            JTree.DropLocation oldValue = (JTree.DropLocation)event.getOldValue();
            repaintDropLocation(oldValue);
            repaintDropLocation(tree.getDropLocation());
        }
    }

    private void repaintDropLocation(JTree.DropLocation loc) {
        if (loc == null) {
            return;
        }

        Rectangle r;

        if (isDropLine(loc)) {
            r = getDropLineRect(loc);
        } else {
            r = tree.getPathBounds(loc.getPath());
            if (r != null) {
                r.x = 0;
                r.width = tree.getWidth();
            }
        }

        if (r != null) {
            tree.repaint(r);
        }
    }

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


    private class SynthTreeCellRenderer extends DefaultTreeCellRenderer
                               implements UIResource {
        SynthTreeCellRenderer() {
        }
        
        @Override
        public String getName() {
            return "Tree.cellRenderer";
        }
        
        @Override
        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(), false);
            }
            else {
                SynthLookAndFeel.resetSelectedUI();
            }
            return super.getTreeCellRendererComponent(tree, value, sel,
                                                      expanded, leaf, row, hasFocus);
        }
        
        @Override
        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);
        }

        @Override
        protected TreeCellEditor createTreeCellEditor() {
            JTextField tf = new JTextField() {
                @Override
                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;
        }
    }
}