Why does not ToolStripMenuButton show icon while ToolStripButton does?

[pkuyjxu]

Both type of button extends StretchImgButton, but ToolStripMenuButton does not show icon, why?

[pkuyjxu]

After added String imgHTML = Canvas.imgHTML(GWT.getHostPageBaseURL() + "images/icons/48/" + iconName + ".png"), it shew the icon, but the title still does not alianed on the center.How to fix?

private ToolStripMenuButton getToolMenuStripButton(String title, String iconName,Menu menu) {
ToolStripMenuButton ret = new ToolStripMenuButton(title,menu);
if (iconName == null)
iconName = "cube_blue";

String imgHTML = Canvas.imgHTML(GWT.getHostPageBaseURL() + "images/icons/48/" + iconName + ".png");
//ret.setTitle("<span>" + imgHTML + "&nbsp;" + title + "</span>");
ret.setTitle(imgHTML + /*"&nbsp;" + */title);
ret.setAlign(Alignment.CENTER);

return ret;
}