com.google.gerrit.client.change.RightSidePopdownAction.java Source code

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Here is the source code for com.google.gerrit.client.change.RightSidePopdownAction.java

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// Copyright (C) 2013 The Android Open Source Project
//
// 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.change;

import com.google.gwt.dom.client.Document;
import com.google.gwt.dom.client.Style;
import com.google.gwt.event.logical.shared.CloseEvent;
import com.google.gwt.event.logical.shared.CloseHandler;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.PopupPanel;
import com.google.gwt.user.client.ui.UIObject;
import com.google.gwt.user.client.ui.Widget;
import com.google.gwtexpui.globalkey.client.GlobalKey;

abstract class RightSidePopdownAction {
    private final ChangeScreen.Style style;
    private final Widget button;
    private final UIObject relativeTo;
    private PopupPanel popup;

    RightSidePopdownAction(ChangeScreen.Style style, UIObject relativeTo, Widget button) {
        this.style = style;
        this.relativeTo = relativeTo;
        this.button = button;
    }

    abstract Widget getWidget();

    void show() {
        if (popup != null) {
            button.removeStyleName(style.selected());
            popup.hide();
            return;
        }

        final PopupPanel p = new PopupPanel(true) {
            @Override
            public void setPopupPosition(int left, int top) {
                top -= Document.get().getBodyOffsetTop();

                int w = Window.getScrollLeft() + Window.getClientWidth();
                int r = relativeTo.getAbsoluteLeft() + relativeTo.getOffsetWidth();
                int right = w - r;
                Style style = getElement().getStyle();
                style.clearProperty("left");
                style.setPropertyPx("right", right);
                style.setPropertyPx("top", top);
            }
        };
        p.setStyleName(style.replyBox());
        p.addAutoHidePartner(button.getElement());
        p.addCloseHandler(new CloseHandler<PopupPanel>() {
            @Override
            public void onClose(CloseEvent<PopupPanel> event) {
                if (popup == p) {
                    button.removeStyleName(style.selected());
                    popup = null;
                }
            }
        });
        p.add(getWidget());
        p.showRelativeTo(relativeTo);
        GlobalKey.dialog(p);
        button.addStyleName(style.selected());
        popup = p;
    }
}