e832. 从JTabbedPane中移动卡片

To move a tab, it must first be removed and then reinserted into the tabbed pane as a new tab. Unfortunately, since there is no object that represents a tab, it is necessary to record all of the tab's properties before moving it and to restore them after the new tab has been created.

This example moves the last tab to the first position:

    // To create a tabbed pane, see e828 创建JTabbedPane

    int src = pane.getTabCount()-1;
    int dst = 0;

    // Get all the properties
    Component comp = pane.getComponentAt(src);
    String label = pane.getTitleAt(src);
    Icon icon = pane.getIconAt(src);
    Icon iconDis = pane.getDisabledIconAt(src);
    String tooltip = pane.getToolTipTextAt(src);
    boolean enabled = pane.isEnabledAt(src);
    int keycode = pane.getMnemonicAt(src);
    int mnemonicLoc = pane.getDisplayedMnemonicIndexAt(src);
    Color fg = pane.getForegroundAt(src);
    Color bg = pane.getBackgroundAt(src);

    // Remove the tab
    pane.remove(src);

    // Add a new tab
    pane.insertTab(label, icon, comp, tooltip, dst);

    // Restore all properties
    pane.setDisabledIconAt(dst, iconDis);
    pane.setEnabledAt(dst, enabled);
    pane.setMnemonicAt(dst, keycode);
    pane.setDisplayedMnemonicIndexAt(dst, mnemonicLoc);
    pane.setForegroundAt(dst, fg);
    pane.setBackgroundAt(dst, bg);

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