diff options
Diffstat (limited to 'src/main/java/com/google/gerrit/client/ui/DirectScreenLink.java')
-rw-r--r-- | src/main/java/com/google/gerrit/client/ui/DirectScreenLink.java | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/src/main/java/com/google/gerrit/client/ui/DirectScreenLink.java b/src/main/java/com/google/gerrit/client/ui/DirectScreenLink.java new file mode 100644 index 0000000000..20176504bf --- /dev/null +++ b/src/main/java/com/google/gerrit/client/ui/DirectScreenLink.java @@ -0,0 +1,56 @@ +// Copyright 2008 Google Inc. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package com.google.gerrit.client.ui; + +import com.google.gerrit.client.Gerrit; +import com.google.gwt.user.client.DOM; +import com.google.gwt.user.client.Event; +import com.google.gwt.user.client.ui.Hyperlink; + +/** + * Link to a Screen which can carry richer payload. + * <p> + * A standard Hyperlink widget which updates the current history token when + * activated, but subclasses are able to create the Screen instance themselves, + * passing additional data into the Screen's constructor. This may permit the + * screen to show some limited information early, before RPCs required to fully + * populate it are even started. + */ +public abstract class DirectScreenLink extends Hyperlink { + /** + * Creates a link with its text and target history token specified. + * + * @param text the hyperlink's text + * @param historyToken the history token to which it will link + */ + protected DirectScreenLink(final String text, final String historyToken) { + super(text, historyToken); + } + + @Override + public void onBrowserEvent(final Event event) { + if (DOM.eventGetType(event) == Event.ONCLICK) { + onClick(event); + } + } + + protected void onClick(final Event event) { + Gerrit.display(getTargetHistoryToken(), createScreen()); + DOM.eventPreventDefault(event); + } + + /** Create the screen this link wants to display. */ + protected abstract Screen createScreen(); +} |