Advanced GWT Components

Hi Sergey,

I extended AdvancedTabPanel to allow setTabEnabled method. Feel free to incorporate into your next release. I had to do some extra work because some of the variables are private in AdvancedTabPanel. Somehow this forum is not allowing uploading both .java and .txt. I have cut&paste the code below...

Thx

pady



/**
*
* Code given as is. Use at your own risk.
*
*/

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.gwt.advanced.client.ui.widget.AdvancedTabPanel;

import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.SourcesTabEvents;
import com.google.gwt.user.client.ui.TabListener;
import com.google.gwt.user.client.ui.Widget;

/**
* @author pady
*
*/
public class FramesTabPanel extends AdvancedTabPanel {


public FramesTabPanel() {

addTabListener(tabListener);
}

private TabListener tabListener = new TabListener() {
@Override
public boolean onBeforeTabSelected(SourcesTabEvents sender, int tabIndex) {
for (TabState tabState : tabStateLst) {
if ( tabIndex == tabState.index && !tabState.enable ) {
return false;
}
}
return true;
}

@Override
public void onTabSelected(SourcesTabEvents sender, int tabIndex) {
}
};

private int tabCnt = 0;

public void addTab(Widget tab, Widget content) {
super.addTab(tab, content);
tabCnt++;
TabState tabState = new TabState();
tabState.index = tabCnt;
tabState.tabWidget = tab;
tabState.enable = true;
tabStateLst.add(tabState);
}

@Override
public void removeTab(Widget tab) {
super.removeTab(tab);
TabState selState = null;
for (TabState tabState : tabStateLst) {
if ( tabState.tabWidget.equals(tab) )
selState = tabState;
}

if ( selState != null ) {
int selIndex = selState.index;
tabStateLst.remove(selState);
for (TabState tabState : tabStateLst) {
if ( tabState.index > selIndex )
tabState.index--;
}
}
}

public void setTabEnabled(int tabIndex, boolean enable) {
Widget w = getTab(tabIndex);
if ( enable ) {
w.removeStyleName("disableTab");
} else {
w.addStyleName("disableTab");
}
for (TabState tabState : tabStateLst) {
if ( tabState.index == tabIndex )
tabState.enable = enable;
}
}

private List<TabListener> tabListeners = new ArrayList<TabListener>();

@Override
public void addTabListener(TabListener listener) {
//super.addTabListener(listener);
tabListeners.add(listener);
}

private int selected = -1;
public int getSelected() {
return selected;
}

public void setSelected(int index) {
if (index >= tabStateLst.size())
return;
boolean continueTabSelection = true;
for (TabListener tabList : tabListeners) {
if ( !tabList.onBeforeTabSelected(this, index) )
continueTabSelection = false;
}

if ( !continueTabSelection )
return;

selected = index;
renderTabs();

for (TabListener tabList : tabListeners) {
tabList.onTabSelected(this, index);
}
resize();
}

private List<TabState> tabStateLst = new ArrayList<TabState>();

private class TabState {
int index;
public Widget tabWidget;
public boolean enable;
}
}

Hi Sergey,

I forgot 2 more methods ( this helps in changing from gwt TabPanel to AdvancedTabPanel very easy...minimal changes )...

public void add(Widget content, Widget tab) {
addTab(tab, content);
}

public void selectTab(int index) {
setSelected(index);
}


Thanks

pady

Done, but I modified your source code to provide GWT 1.4, 1.5 support