Let's read the following code:
======CellPanel.java===
/**
* Sets the height of the cell associated with the given widget,
related to
* the panel as a whole.
*
* @param w the widget whose cell height is to be set
* @param height the cell's height, in CSS units
*/
public void setCellHeight(Widget w, String height) {
Element td = DOM.getParent(w.getElement());
DOM.setElementProperty(td, "height", height);
}
/**
* Sets the horizontal alignment of the given widget within its
cell.
*
* @param w the widget whose horizontal alignment is to be set
* @param align the widget's horizontal alignment, as defined in
* [EMAIL PROTECTED] HasHorizontalAlignment}.
*/
public void setCellHorizontalAlignment(Widget w,
HorizontalAlignmentConstant align) {
Element td = getWidgetTd(w);
if (td != null) {
setCellHorizontalAlignment(td, align);
}
}
/**
* Sets the vertical alignment of the given widget within its cell.
*
* @param w the widget whose vertical alignment is to be set
* @param align the widget's vertical alignment, as defined in
* [EMAIL PROTECTED] HasVerticalAlignment}.
*/
public void setCellVerticalAlignment(Widget w,
VerticalAlignmentConstant align) {
Element td = getWidgetTd(w);
if (td != null) {
setCellVerticalAlignment(td, align);
}
}
/**
* Sets the width of the cell associated with the given widget,
related to the
* panel as a whole.
*
* @param w the widget whose cell width is to be set
* @param width the cell's width, in CSS units
*/
public void setCellWidth(Widget w, String width) {
Element td = DOM.getParent(w.getElement());
DOM.setElementProperty(td, "width", width);
}
====
The method setCellSize is defferent from setCellAlign.
I want to say that, there is a bug use setCellSize:
VerticalPanel v = new VerticalPanel();
Button b = new Button("Button");
v.setCellWidth(b, "100px");
v.add(b);
These codes are normal when i uesed in debug model, but there is a IE
error after i comlie it. The "td" is null!
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