本文整理汇总了Java中java.awt.Container.isValid方法的典型用法代码示例。如果您正苦于以下问题：Java Container.isValid方法的具体用法？Java Container.isValid怎么用？Java Container.isValid使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类java.awt.Container的用法示例。
在下文中一共展示了Container.isValid方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: layoutSize
import java.awt.Container; //导入方法依赖的package包/类
/**
* Returns the minimum or preferred dimension needed to layout the target
* container.
*
* @param target target to get layout size for
* @param preferred should preferred size be calculated
* @return the dimension to layout the target container
*/
private Dimension layoutSize(final Container target, final boolean preferred) {
synchronized (target.getTreeLock()) {
// Each row must fit with the width allocated to the containter.
// When the container width = 0, the preferred width of the container
// has not yet been calculated so lets ask for the maximum.
int targetWidth = target.getSize().width;
if (targetWidth == 0) {
targetWidth = Integer.MAX_VALUE;
}
final int hgap = getHgap();
final int vgap = getVgap();
final Insets insets = target.getInsets();
final int horizontalInsetsAndGap = insets.left + insets.right + (hgap * 2);
final int maxWidth = targetWidth - horizontalInsetsAndGap;
// Fit components into the allowed width
final Dimension dim = new Dimension(0, 0);
int rowWidth = 0;
int rowHeight = 0;
final int nmembers = target.getComponentCount();
for (int i = 0; i < nmembers; i++) {
final Component m = target.getComponent(i);
if (m.isVisible()) {
final Dimension d = preferred ? m.getPreferredSize() : m.getMinimumSize();
// Can't add the component to current row. Start a new row.
if (rowWidth + d.width > maxWidth) {
addRow(dim, rowWidth, rowHeight);
rowWidth = 0;
rowHeight = 0;
}
// Add a horizontal gap for all components after the first
if (rowWidth != 0) {
rowWidth += hgap;
}
rowWidth += d.width;
rowHeight = Math.max(rowHeight, d.height);
}
}
addRow(dim, rowWidth, rowHeight);
dim.width += horizontalInsetsAndGap;
dim.height += insets.top + insets.bottom + vgap * 2;
// When using a scroll pane or the DecoratedLookAndFeel we need to
// make sure the preferred size is less than the size of the
// target containter so shrinking the container size works
// correctly. Removing the horizontal gap is an easy way to do this.
final Container scrollPane = SwingUtilities.getAncestorOfClass(JScrollPane.class, target);
if (scrollPane != null && target.isValid()) {
dim.width -= (hgap + 1);
}
return dim;
}
}