com.google.gerrit.client.ui.CommentedActionDialog.java Source code

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Here is the source code for com.google.gerrit.client.ui.CommentedActionDialog.java

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// Copyright (C) 2009 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.ui;

import com.google.gerrit.client.Gerrit;
import com.google.gerrit.client.rpc.GerritCallback;
import com.google.gerrit.client.ui.SmallHeading;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.logical.shared.CloseEvent;
import com.google.gwt.event.logical.shared.CloseHandler;
import com.google.gwt.user.client.DOM;
import com.google.gwtjsonrpc.common.AsyncCallback;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.FocusWidget;
import com.google.gwt.user.client.ui.PopupPanel;
import com.google.gwtexpui.globalkey.client.GlobalKey;
import com.google.gwtexpui.globalkey.client.NpTextArea;
import com.google.gwtexpui.user.client.AutoCenterDialogBox;

public abstract class CommentedActionDialog<T> extends AutoCenterDialogBox implements CloseHandler<PopupPanel> {
    protected final FlowPanel panel;
    protected final NpTextArea message;
    protected final Button sendButton;
    protected final Button cancelButton;
    protected final FlowPanel buttonPanel;
    protected AsyncCallback<T> callback;
    protected FocusWidget focusOn;

    protected boolean sent = false;

    public CommentedActionDialog(final String title, final String heading, AsyncCallback<T> callback) {
        super(/* auto hide */false, /* modal */true);
        this.callback = callback;
        setGlassEnabled(true);
        setText(title);

        addStyleName(Gerrit.RESOURCES.css().commentedActionDialog());

        message = new NpTextArea();
        message.setCharacterWidth(60);
        message.setVisibleLines(10);
        DOM.setElementPropertyBoolean(message.getElement(), "spellcheck", true);
        setFocusOn(message);
        sendButton = new Button(Util.C.commentedActionButtonSend());
        sendButton.addClickHandler(new ClickHandler() {
            @Override
            public void onClick(final ClickEvent event) {
                enableButtons(false);
                onSend();
            }
        });

        cancelButton = new Button(Util.C.commentedActionButtonCancel());
        DOM.setStyleAttribute(cancelButton.getElement(), "marginLeft", "300px");
        cancelButton.addClickHandler(new ClickHandler() {
            @Override
            public void onClick(final ClickEvent event) {
                hide();
            }
        });

        final FlowPanel mwrap = new FlowPanel();
        mwrap.setStyleName(Gerrit.RESOURCES.css().commentedActionMessage());
        mwrap.add(message);

        buttonPanel = new FlowPanel();
        buttonPanel.add(sendButton);
        buttonPanel.add(cancelButton);

        panel = new FlowPanel();
        panel.add(new SmallHeading(heading));
        panel.add(mwrap);
        panel.add(buttonPanel);
        add(panel);

        addCloseHandler(this);
    }

    public void setFocusOn(FocusWidget focusWidget) {
        focusOn = focusWidget;
    }

    public void enableButtons(boolean enable) {
        sendButton.setEnabled(enable);
        cancelButton.setEnabled(enable);
    }

    @Override
    public void center() {
        super.center();
        GlobalKey.dialog(this);
        if (focusOn != null) {
            focusOn.setFocus(true);
        }
    }

    @Override
    public void onClose(CloseEvent<PopupPanel> event) {
        if (!sent) {
            // the dialog was closed without the send button being pressed
            // e.g. the user pressed Cancel or ESC to close the dialog
            if (callback != null) {
                callback.onFailure(null);
            }
        }
        sent = false;
    }

    public abstract void onSend();

    public String getMessageText() {
        return message.getText().trim();
    }

    public AsyncCallback<T> createCallback() {
        return new GerritCallback<T>() {
            @Override
            public void onSuccess(T result) {
                sent = true;
                if (callback != null) {
                    callback.onSuccess(result);
                }
                hide();
            }

            @Override
            public void onFailure(Throwable caught) {
                enableButtons(true);
                super.onFailure(caught);
            }
        };
    }
}