synthtoolbarui.java

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

        int w = dragWindow.getWidth();
        int h = dragWindow.getHeight();
        SynthContext context = getContext(
                toolBar, Region.TOOL_BAR_DRAG_WINDOW, dragWindowStyle);
        SynthLookAndFeel.updateSubregion(
                context, g, new Rectangle(0, 0, w, h));
        context.getPainter().paintToolBarDragWindowBackground(context,
                                                           g, 0, 0, w, h,
                                                           dragWindow.getOrientation());
        context.getPainter().paintToolBarDragWindowBorder(context, g, 0, 0, w, h,
                                                          dragWindow.getOrientation());
        context.dispose();
    }

    //
    // PropertyChangeListener
    //

    public void propertyChange(PropertyChangeEvent e) {
        if (SynthLookAndFeel.shouldUpdateStyle(e)) {
            updateStyle((JToolBar)e.getSource());
        }
    }


    class SynthToolBarLayoutManager implements LayoutManager {
        public void addLayoutComponent(String name, Component comp) {}

        public void removeLayoutComponent(Component comp) {}

        public Dimension minimumLayoutSize(Container parent) {
            JToolBar tb = (JToolBar)parent;
            Insets insets = tb.getInsets();
            Dimension dim = new Dimension();
            SynthContext context = getContext(tb);

            if (tb.getOrientation() == JToolBar.HORIZONTAL) {
                dim.width = tb.isFloatable() ?
                    SynthIcon.getIconWidth(handleIcon, context) : 0;
                Dimension compDim;
                for (int i = 0; i < tb.getComponentCount(); i++) {
                    compDim = tb.getComponent(i).getMinimumSize();
                    dim.width += compDim.width;
                    dim.height = Math.max(dim.height, compDim.height);
                }
            } else {
                dim.height = tb.isFloatable() ?
                    SynthIcon.getIconHeight(handleIcon, context) : 0;
                Dimension compDim;
                for (int i = 0; i < tb.getComponentCount(); i++) {
                    compDim = tb.getComponent(i).getMinimumSize();
                    dim.width = Math.max(dim.width, compDim.width);
                    dim.height += compDim.height;
                }
            }
            dim.width += insets.left + insets.right;
            dim.height += insets.top + insets.bottom;

            context.dispose();
            return dim;
        }

        public Dimension preferredLayoutSize(Container parent) {
            JToolBar tb = (JToolBar)parent;
            Insets insets = tb.getInsets();
            Dimension dim = new Dimension();
            SynthContext context = getContext(tb);

            if (tb.getOrientation() == JToolBar.HORIZONTAL) {
                dim.width = tb.isFloatable() ?
                    SynthIcon.getIconWidth(handleIcon, context) : 0;
                Dimension compDim;
                for (int i = 0; i < tb.getComponentCount(); i++) {
                    compDim = tb.getComponent(i).getPreferredSize();
                    dim.width += compDim.width;
                    dim.height = Math.max(dim.height, compDim.height);
                }
            } else {
                dim.height = tb.isFloatable() ?
                    SynthIcon.getIconHeight(handleIcon, context) : 0;
                Dimension compDim;
                for (int i = 0; i < tb.getComponentCount(); i++) {
                    compDim = tb.getComponent(i).getPreferredSize();
                    dim.width = Math.max(dim.width, compDim.width);
                    dim.height += compDim.height;
                }
            }
            dim.width += insets.left + insets.right;
            dim.height += insets.top + insets.bottom;

            context.dispose();
            return dim;
        }

        public void layoutContainer(Container parent) {
            JToolBar tb = (JToolBar)parent;
            Insets insets = tb.getInsets();
            boolean ltr = tb.getComponentOrientation().isLeftToRight();
            SynthContext context = getContext(tb);

            Component c;
            Dimension d;
            
            // JToolBar by default uses a somewhat modified BoxLayout as
            // its layout manager. For compatibility reasons, we want to
            // support Box "glue" as a way to move things around on the
            // toolbar. "glue" is represented in BoxLayout as a Box.Filler
            // with a minimum and preferred size of (0,0).
            // So what we do here is find the number of such glue fillers
            // and figure out how much space should be allocated to them.
            int glueCount = 0;
            for (int i=0; i<tb.getComponentCount(); i++) {
                if (isGlue(tb.getComponent(i))) glueCount++;
            }
            
            if (tb.getOrientation() == JToolBar.HORIZONTAL) {
                int handleWidth = tb.isFloatable() ?
                    SynthIcon.getIconWidth(handleIcon, context) : 0;

                // Note: contentRect does not take insets into account
                // since it is used for determining the bounds that are
                // passed to paintToolBarContentBackground().
                contentRect.x = ltr ? handleWidth : 0;
                contentRect.y = 0;
                contentRect.width = tb.getWidth() - handleWidth;
                contentRect.height = tb.getHeight();

                // However, we do take the insets into account here for
                // the purposes of laying out the toolbar child components.
                int x = ltr ?
                    handleWidth + insets.left :
                    tb.getWidth() - handleWidth - insets.right;
                int baseY = insets.top;
                int baseH = tb.getHeight() - insets.top - insets.bottom;

                // we need to get the minimum width for laying things out
                // so that we can calculate how much empty space needs to
                // be distributed among the "glue", if any
                int extraSpacePerGlue = 0;
                if (glueCount > 0) {
                    int minWidth = minimumLayoutSize(parent).width;
                    extraSpacePerGlue = (tb.getWidth() - minWidth) / glueCount;
                    if (extraSpacePerGlue < 0) extraSpacePerGlue = 0;
                }
                
                for (int i = 0; i < tb.getComponentCount(); i++) {
                    c = tb.getComponent(i);
                    d = c.getPreferredSize();
                    int y, h;
                    if (d.height >= baseH || c instanceof JSeparator) {
                        // Fill available height
                        y = baseY;
                        h = baseH;
                    } else {
                        // Center component vertically in the available space
                        y = baseY + (baseH / 2) - (d.height / 2);
                        h = d.height;
                    }
                    //if the component is a "glue" component then add to its
                    //width the extraSpacePerGlue it is due
                    if (isGlue(c)) d.width += extraSpacePerGlue;
                    c.setBounds(ltr ? x : x - d.width, y, d.width, h);
                    x = ltr ? x + d.width : x - d.width;
                }
            } else {
                int handleHeight = tb.isFloatable() ?
                    SynthIcon.getIconHeight(handleIcon, context) : 0;

                // See notes above regarding the use of insets
                contentRect.x = 0;
                contentRect.y = handleHeight;
                contentRect.width = tb.getWidth();
                contentRect.height = tb.getHeight() - handleHeight;

                int baseX = insets.left;
                int baseW = tb.getWidth() - insets.left - insets.right;
                int y = handleHeight + insets.top;

                // we need to get the minimum height for laying things out
                // so that we can calculate how much empty space needs to
                // be distributed among the "glue", if any
                int extraSpacePerGlue = 0;
                if (glueCount > 0) {
                    int minHeight = minimumLayoutSize(parent).height;
                    extraSpacePerGlue = (tb.getHeight() - minHeight) / glueCount;
                    if (extraSpacePerGlue < 0) extraSpacePerGlue = 0;
                }
                
                for (int i = 0; i < tb.getComponentCount(); i++) {
                    c = tb.getComponent(i);
                    d = c.getPreferredSize();
                    int x, w;
                    if (d.width >= baseW || c instanceof JSeparator) {
                        // Fill available width
                        x = baseX;
                        w = baseW;
                    } else {
                        // Center component horizontally in the available space
                        x = baseX + (baseW / 2) - (d.width / 2);
                        w = d.width;
                    }
                    //if the component is a "glue" component then add to its
                    //height the extraSpacePerGlue it is due
                    if (isGlue(c)) d.height += extraSpacePerGlue;
                    c.setBounds(x, y, w, d.height);
                    y += d.height;
                }
            }
            context.dispose();
        }
        
        private boolean isGlue(Component c) {
            if (c instanceof Box.Filler) {
                Box.Filler f = (Box.Filler)c;
                Dimension min = f.getMinimumSize();
                Dimension pref = f.getPreferredSize();
                return min.width == 0 &&  min.height == 0 &&
                        pref.width == 0 && pref.height == 0;
            }
            return false;
        }
    }
}