- GXT version: 2.2.5
- Host mode / web mode / both: All
- Browser and version: All
- Operating System: Windows 7

public void setSize(float size)
The region's preferred size. Values of 1 or less are treated as percentages (defaults to 200).
Parameters:
size - the region size

But if size < 1 :

com.extjs.gxt.ui.client.widget.CollapsePanel

PHP Code:
 308         int w 0;
 
309         int h 0;
 
310
 311         
switch (region) {
 
312             case WEST:
 
313             case EAST:
 
314                  w = (int) parentData.getSize(); // (float) size < 1 ~ (int) 0!
 
315                  h box.height 25;
 
316                  break;
 
317             case NORTH:
 
318             case SOUTH:
 
319                  w box.width;
 
320                  h = (int) parentData.getSize(); // (float) size < 1 ~ (int) 0!
 
321         }
 
322
 323         
// needed to enforce correct sizing
 
324         panel.removeFromParent();
 
325         popup.setSize(wh); // popup will be have incorrect position!
 
326         popup.show(getElement(), alignadj);
 
327         popup.add(panel);
 
328         popup.layout();
 
329
 330         afterShowPanel
(panel);
 
331