synthtabbedpaneui.java

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

                //forward the event (this will set the selected index, or none at all
                delegate.mousePressed(e);
            }

            public void mouseReleased(MouseEvent e) {
                if (selectedTabIsPressed) {
                    selectedTabIsPressed = false;
                    //TODO need to just repaint the tab area!
                    tabPane.repaint();
                }
                //forward the event
                delegate.mouseReleased(e);

                //hack: The super method *should* be setting the mouse-over property correctly
                //here, but it doesn't. That is, when the mouse is released, whatever tab is below the
                //released mouse should be in rollover state. But, if you select a tab and don't
                //move the mouse, this doesn't happen. Hence, forwarding the event.
                delegate2.mouseMoved(e);
            }
        };
    }

    @Override
    protected int getTabLabelShiftX(int tabPlacement, int tabIndex, boolean isSelected) {
        if (nudgeSelectedLabel) {
            return super.getTabLabelShiftX(tabPlacement, tabIndex, isSelected);
        } else {
            return 0;
        }
    }

    @Override
    protected int getTabLabelShiftY(int tabPlacement, int tabIndex, boolean isSelected) {
        if (nudgeSelectedLabel) {
            return super.getTabLabelShiftY(tabPlacement, tabIndex, isSelected);
        } else {
            return 0;
        }
    }

    public void update(Graphics g, JComponent c) {
        SynthContext context = getContext(c);

        SynthLookAndFeel.update(context, g);
        context.getPainter().paintTabbedPaneBackground(context,
                          g, 0, 0, c.getWidth(), c.getHeight());
        paint(context, g);
        context.dispose();
    }

    protected int getBaseline(int tab) {
        if (tabPane.getTabComponentAt(tab) != null ||
                getTextViewForTab(tab) != null) {
            return super.getBaseline(tab);
        }
        String title = tabPane.getTitleAt(tab);
        Font font = tabContext.getStyle().getFont(tabContext);
        FontMetrics metrics = getFontMetrics(font);
        Icon icon = getIconForTab(tab);
        textRect.setBounds(0, 0, 0, 0);
        iconRect.setBounds(0, 0, 0, 0);
        calcRect.setBounds(0, 0, Short.MAX_VALUE, maxTabHeight);
        tabContext.getStyle().getGraphicsUtils(tabContext).layoutText(
                tabContext, metrics, title, icon, SwingUtilities.CENTER,
                SwingUtilities.CENTER, SwingUtilities.LEADING,
                SwingUtilities.TRAILING, calcRect,
                iconRect, textRect, textIconGap);
        return textRect.y + metrics.getAscent() + getBaselineOffset();
    }

    public void paintBorder(SynthContext context, Graphics g, int x,
                            int y, int w, int h) {
        context.getPainter().paintTabbedPaneBorder(context, g, x, y, w, h);
    }

    public void paint(Graphics g, JComponent c) {
        SynthContext context = getContext(c);

        paint(context, g);
        context.dispose();
    }

    protected void paint(SynthContext context, Graphics g) {
        int selectedIndex = tabPane.getSelectedIndex();
        int tabPlacement = tabPane.getTabPlacement();

        ensureCurrentLayout();

	// Paint tab area
	// If scrollable tabs are enabled, the tab area will be
	// painted by the scrollable tab panel instead.
	//
	if (!scrollableTabLayoutEnabled()) { // WRAP_TAB_LAYOUT
            Insets insets = tabPane.getInsets();
            int x = insets.left;
            int y = insets.top;
            int width = tabPane.getWidth() - insets.left - insets.right;
            int height = tabPane.getHeight() - insets.top - insets.bottom;
            int size;
            switch(tabPlacement) {
            case LEFT:
                width = calculateTabAreaWidth(tabPlacement, runCount,
                                              maxTabWidth);
                break;
            case RIGHT:
                size = calculateTabAreaWidth(tabPlacement, runCount,
                                             maxTabWidth);
                x = x + width - size;
                width = size;
                break;            
            case BOTTOM:
                size = calculateTabAreaHeight(tabPlacement, runCount,
                                              maxTabHeight);
                y = y + height - size;
                height = size;
                break;
            case TOP:
            default:
                height = calculateTabAreaHeight(tabPlacement, runCount,
                                                maxTabHeight);
            }
            
            tabAreaBounds.setBounds(x, y, width, height);
            
            if (g.getClipBounds().intersects(tabAreaBounds)) {
                paintTabArea(tabAreaContext, g, tabPlacement,
                         selectedIndex, tabAreaBounds);
            }
	}
	
        // Paint content border
        paintContentBorder(tabContentContext, g, tabPlacement, selectedIndex);
    }


    protected void paintTabArea(Graphics g, int tabPlacement,
                                int selectedIndex) {
        // This can be invoked from ScrollabeTabPanel
        Insets insets = tabPane.getInsets();
        int x = insets.left;
        int y = insets.top;
        int width = tabPane.getWidth() - insets.left - insets.right;
        int height = tabPane.getHeight() - insets.top - insets.bottom;

        paintTabArea(tabAreaContext, g, tabPlacement, selectedIndex,
                     new Rectangle(x, y, width, height));
    }

    protected void paintTabArea(SynthContext ss, Graphics g,
                                int tabPlacement, int selectedIndex,
                                Rectangle tabAreaBounds) {
        Rectangle clipRect = g.getClipBounds();  

        //if the tab area's states should match that of the selected tab, then
        //first update the selected tab's states, then set the state
        //for the tab area to match
        //otherwise, restore the tab area's state to ENABLED (which is the
        //only supported state otherwise).
        if (tabAreaStatesMatchSelectedTab && selectedIndex >= 0) {
            updateTabContext(selectedIndex, true, selectedTabIsPressed,
                              (getRolloverTab() == selectedIndex),
                              (getFocusIndex() == selectedIndex));
            ss.setComponentState(tabContext.getComponentState());
        } else {
            ss.setComponentState(SynthConstants.ENABLED);
        }

        // Paint the tab area.
        SynthLookAndFeel.updateSubregion(ss, g, tabAreaBounds);
        ss.getPainter().paintTabbedPaneTabAreaBackground(ss, g,
             tabAreaBounds.x, tabAreaBounds.y, tabAreaBounds.width,
             tabAreaBounds.height, tabPlacement);
        ss.getPainter().paintTabbedPaneTabAreaBorder(ss, g, tabAreaBounds.x,
             tabAreaBounds.y, tabAreaBounds.width, tabAreaBounds.height,
             tabPlacement);

        int tabCount = tabPane.getTabCount();

        iconRect.setBounds(0, 0, 0, 0);
        textRect.setBounds(0, 0, 0, 0);

        // Paint tabRuns of tabs from back to front
        for (int i = runCount - 1; i >= 0; i--) {
            int start = tabRuns[i];
            int next = tabRuns[(i == runCount - 1)? 0 : i + 1];
            int end = (next != 0? next - 1: tabCount - 1);
            for (int j = start; j <= end; j++) {
                if (rects[j].intersects(clipRect) && selectedIndex != j) {
                    paintTab(tabContext, g, tabPlacement, rects, j, iconRect,
                             textRect);
                }
            }
        }

        if (selectedIndex >= 0) {
            if (rects[selectedIndex].intersects(clipRect)) {
                paintTab(tabContext, g, tabPlacement, rects, selectedIndex,
                         iconRect, textRect);
            }
        }
    }
    
    protected void setRolloverTab(int index) {
        int oldRolloverTab = getRolloverTab();
        super.setRolloverTab(index);

        Rectangle r = null;
        
        if (oldRolloverTab != index && tabAreaStatesMatchSelectedTab) {
            //TODO need to just repaint the tab area!
            tabPane.repaint();
        } else {
            if ((oldRolloverTab >= 0) && (oldRolloverTab < tabPane.getTabCount())) {
                r = getTabBounds(tabPane, oldRolloverTab);
                if (r != null) {
                    tabPane.repaint(r);
                }
            }

            if (index >= 0) {
                r = getTabBounds(tabPane, index);
                if (r != null) {
                    tabPane.repaint(r);
                }
            }
        }
    }

    protected void paintTab(SynthContext ss, Graphics g,
                            int tabPlacement, Rectangle[] rects, int tabIndex, 
                            Rectangle iconRect, Rectangle textRect) {
        Rectangle tabRect = rects[tabIndex];
        int selectedIndex = tabPane.getSelectedIndex();
        boolean isSelected = selectedIndex == tabIndex;
        updateTabContext(tabIndex, isSelected, isSelected && selectedTabIsPressed,
                          (getRolloverTab() == tabIndex), 
                          (getFocusIndex() == tabIndex));

        SynthLookAndFeel.updateSubregion(ss, g, tabRect);
        int x = tabRect.x;
        int y = tabRect.y;
        int height = tabRect.height;
        int width = tabRect.width;
        int placement = tabPane.getTabPlacement();
        if (extendTabsToBase && runCount > 1) {
            //paint this tab such that its edge closest to the base is equal to
            //edge of the selected tab closest to the base. In terms of the TOP
            //tab placement, this will cause the bottom of each tab to be
            //painted even with the bottom of the selected tab. This is because
            //in each tab placement (TOP, LEFT, BOTTOM, RIGHT) the selected tab
            //is closest to the base.
            if (selectedIndex >= 0) {
                Rectangle r = rects[selectedIndex];
                switch (placement) {
                    case TOP:
                        int bottomY = r.y + r.height;
                        height = bottomY - tabRect.y;
                        break;
                    case LEFT:
                        int rightX = r.x + r.width;
                        width = rightX - tabRect.x;
                        break;
                    case BOTTOM:
                        int topY = r.y;
                        height = (tabRect.y + tabRect.height) - topY;
                        y = topY;
                        break;
                    case RIGHT:
                        int leftX = r.x;
                        width = (tabRect.x + tabRect.width) - leftX;
                        x = leftX;
                        break;
                }
            }
        }
        tabContext.getPainter().paintTabbedPaneTabBackground(tabContext, g,
                x, y, width, height, tabIndex, placement);