SwtUtil.java 文件源码

/**
 * Setup some sensible paging information.
 */
public static void setupPagingInformation(ScrolledComposite composite) {
    GC gc = new GC(composite);
    FontMetrics fontMetrics = gc.getFontMetrics();
    gc.dispose();
    int fontHeight = fontMetrics.getHeight();
    int fontWidth = fontMetrics.getAverageCharWidth();
    Rectangle clientArea = composite.getClientArea();
    int lines = clientArea.height / fontHeight;
    int pageHeight = lines * fontHeight;
    int pageWidth = clientArea.width - fontWidth; 
    composite.getVerticalBar().setIncrement(fontHeight);
    composite.getVerticalBar().setPageIncrement(pageHeight);
    composite.getHorizontalBar().setIncrement(fontWidth);
    composite.getHorizontalBar().setPageIncrement(pageWidth);
}