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Java example source code file (awt_Label.h)

This example Java source code file (awt_Label.h) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

awt_label_h, awtcomponent, awtlabel, bool, dopaint, enable, getclassname, lazypaint, lparam, msgrouting, rect, wmerasebkgnd, wmpaint, wmprintclient

The awt_Label.h Java example source code

/*
 * Copyright (c) 1996, 2004, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

#ifndef AWT_LABEL_H
#define AWT_LABEL_H

#include "awt_Component.h"

#include "java_awt_Label.h"
#include "sun_awt_windows_WLabelPeer.h"


/************************************************************************
 * AwtLabel class
 */

class AwtLabel : public AwtComponent {
public:
    /*
     * java.awt.Label fields
     */
    static jfieldID textID;
    static jfieldID alignmentID;

    AwtLabel();

    virtual LPCTSTR GetClassName();

    static AwtLabel* Create(jobject label, jobject parent);

    /*
     * Windows message handler functions
     */
    virtual MsgRouting WmPaint(HDC hDC);
    virtual MsgRouting WmPrintClient(HDC hDC, LPARAM flags);
    virtual MsgRouting WmEraseBkgnd(HDC hDC, BOOL& didErase);

    /*
     * if WM_PAINT was recieving when we can not paint
     * then setup m_needPaint end when can call this function
     */
    void LazyPaint();
     /*
      * Enable/disable component
      */
    virtual void Enable(BOOL bEnable);

    // some methods called on Toolkit thread
    static void _SetText(void *param);
    static void _SetAlignment(void *param);
    static void _LazyPaint(void *param);

private:
    BOOL m_needPaint; // flags for lazy paint of Label

    void DoPaint(HDC hDC, RECT& r);
};

#endif /* AWT_LABEL_H */

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