Hello all,
Please I’d appreciate if you could help me. I’ve got a FlexTable and
when I use left , right , up , down keyboard it changes the:
cell’s board to read;
show on a TexBox what keyboard was used.
If enter it changes de cell’s text to the TexBox’s text
All these are working. However, the performance get worse and worse
when the keyboards left , right , up , down and enter are used. The
more I used them , the more it increases the time to change the cell’s
text to the TextBox’s text, such as, 10 seconds and if I use the
keyboards more, it might increases to 15 , 20 seconds.
Please help me to sort this performance’s problem
Pires
my Code:
package com.sibopsoft.begin.client;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.Element;
import com.google.gwt.user.client.Event;
import com.google.gwt.user.client.ui.KeyboardListener;
import com.google.gwt.user.client.ui.KeyboardListenerAdapter;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.FlexTable;
import com.google.gwt.user.client.ui.Widget;
public class Test extends VerticalPanel implements EntryPoint {
TextBox tb = new TextBox();
FlexTable t = new FlexTable();
int l=0;
int c=0;
public void onModuleLoad() {
t.setBorderWidth(1);
t.setCellSpacing(5);
for (int i=0 ; i<15 ; i++)
for (int j=0 ; j<15 ; j++)
t.setText(i,j, "KAKA");
add(tb);
add(t);
sinkEvents(Event.KEYEVENTS);
RootPanel.get().add(this);
}
public void onBrowserEvent(Event e) {
int type = DOM.eventGetType(e);
Element el = DOM.eventGetFromElement(e);
if ( type == Event.ONKEYDOWN ) {
if ( KeyboardListener.KEY_RIGHT ==
DOM.eventGetKeyCode
(e) ) {
tb.setText("KEY_RIGHT");
t.getFlexCellFormatter().setStyleName(l, c+=1,
"FlexTable-Cell-Red");
t.getFlexCellFormatter().setStyleName(l, c-1,
"FlexTable-Cell-Black");
}
if ( KeyboardListener.KEY_LEFT == DOM.eventGetKeyCode
(e) ) {
tb.setText("KEY_LEFT");
t.getFlexCellFormatter().setStyleName(l, c-=1,
"FlexTable-Cell-Red");
t.getFlexCellFormatter().setStyleName(l, c+1,
"FlexTable-Cell-Black");
}
if ( KeyboardListener.KEY_UP == DOM.eventGetKeyCode(e) )
{
tb.setText("KEY_RIGHT");
t.getFlexCellFormatter().setStyleName(l-=1, c,
"FlexTable-Cell-Red");
t.getFlexCellFormatter().setStyleName(l+1, c,
"FlexTable-Cell-Black");
}
if ( KeyboardListener.KEY_DOWN == DOM.eventGetKeyCode
(e) ) {
tb.setText("KEY_LEFT");
t.getFlexCellFormatter().setStyleName(l+=1, c,
"FlexTable-Cell-Red");
t.getFlexCellFormatter().setStyleName(l-1, c,
"FlexTable-Cell-Black");
}
}
tb.addKeyboardListener(new KeyboardListenerAdapter() {
public void onKeyDown(Widget sender, char keyCode, int
modifiers) {
if (keyCode == (char) KEY_ENTER)
t.setText(l, c, tb.getText());
}
});
}
}
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