/*
* DelayLoadWorkbenchTab.java
*
* Copyright (C) 2009-12 by RStudio, Inc.
*
* Unless you have received this program directly from RStudio pursuant
* to the terms of a commercial license agreement with RStudio, then
* this program is licensed to you under the terms of version 3 of the
* GNU Affero General Public License. This program is distributed WITHOUT
* ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT,
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the
* AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details.
*
*/
package org.rstudio.studio.client.workbench.ui;
import com.google.gwt.dom.client.Style;
import com.google.gwt.event.shared.HandlerManager;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.user.client.Command;
import com.google.gwt.user.client.ui.DockLayoutPanel;
import com.google.gwt.user.client.ui.IsWidget;
import com.google.gwt.user.client.ui.Panel;
import com.google.gwt.user.client.ui.Widget;
import org.rstudio.core.client.SerializedCommandQueue;
import org.rstudio.core.client.events.EnsureHiddenEvent;
import org.rstudio.core.client.events.EnsureHiddenHandler;
import org.rstudio.core.client.events.EnsureHeightEvent;
import org.rstudio.core.client.events.EnsureHeightHandler;
import org.rstudio.core.client.events.EnsureVisibleEvent;
import org.rstudio.core.client.events.EnsureVisibleHandler;
import org.rstudio.studio.client.RStudioGinjector;
public abstract class DelayLoadWorkbenchTab<T extends IsWidget>
implements WorkbenchTab
{
protected DelayLoadWorkbenchTab(
String title,
DelayLoadTabShim<T, ? extends DelayLoadWorkbenchTab<T>> shimmed)
{
title_ = title;
panel_ = new DockLayoutPanel(Style.Unit.PX);
shimmed_ = shimmed;
shimmed_.setParentTab(this);
}
public Widget asWidget()
{
return panel_;
}
public String getTitle()
{
return title_;
}
public Panel getPanel()
{
return panel_;
}
public final void onBeforeSelected()
{
shimmed_.onBeforeSelected();
}
public void onBeforeUnselected()
{
shimmed_.onBeforeUnselected();
}
public void prefetch(final Command continuation)
{
shimmed_.forceLoad(true, continuation);
}
public final void onSelected()
{
shimmed_.onSelected();
}
public boolean isSuppressed()
{
return false;
}
@Override
public boolean closeable()
{
return false;
}
@Override
public void confirmClose(Command onConfirmed)
{
onConfirmed.execute();
}
public void ensureVisible(boolean activate)
{
handlers_.fireEvent(new EnsureVisibleEvent(activate));
}
public void ensureHidden()
{
handlers_.fireEvent(new EnsureHiddenEvent());
}
public void ensureHeight(int height)
{
handlers_.fireEvent(new EnsureHeightEvent(height));
}
public HandlerRegistration addEnsureVisibleHandler(EnsureVisibleHandler handler)
{
return handlers_.addHandler(EnsureVisibleEvent.TYPE, handler);
}
public HandlerRegistration addEnsureHiddenHandler(EnsureHiddenHandler handler)
{
return handlers_.addHandler(EnsureHiddenEvent.TYPE, handler);
}
public HandlerRegistration addEnsureHeightHandler(EnsureHeightHandler handler)
{
return handlers_.addHandler(EnsureHeightEvent.TYPE, handler);
}
protected void setInternalCallbacks(InternalCallbacks callbacks)
{
callbacks_ = callbacks;
}
protected interface InternalCallbacks
{
void onBeforeSelected();
void onSelected();
}
protected void initialize(final WorkbenchPane pane, Panel panel)
{
assert !initialized_;
initialized_ = true;
pane.ensureWidget();
panel.add(pane);
pane.addEnsureVisibleHandler(new EnsureVisibleHandler()
{
public void onEnsureVisible(EnsureVisibleEvent event)
{
ensureVisible(event.getActivate());
}
});
pane.addEnsureHiddenHandler(new EnsureHiddenHandler()
{
@Override
public void onEnsureHidden(EnsureHiddenEvent event)
{
ensureHidden();
}
});
setInternalCallbacks(new InternalCallbacks()
{
public void onBeforeSelected()
{
pane.onBeforeSelected();
}
public void onSelected()
{
pane.onSelected();
}
});
pane.onBeforeSelected();
pane.onSelected();
}
protected void handleCodeLoadFailure(Throwable reason)
{
RStudioGinjector.INSTANCE.getGlobalDisplay().showErrorMessage(
"Code Failed to Load",
reason == null ? "(Unknown error)" : reason.getMessage());
}
private final HandlerManager handlers_ = new HandlerManager(null);
@SuppressWarnings("unused")
private SerializedCommandQueue initQueue = new SerializedCommandQueue();
private boolean initialized_;
protected final DockLayoutPanel panel_;
private final String title_;
@SuppressWarnings("unused")
private InternalCallbacks callbacks_;
private DelayLoadTabShim<T, ?> shimmed_;
}