render_form.h

monqueror一个很具有参考价值的源玛

/*
 * This file is part of the DOM implementation for KDE.
 *
 * Copyright (C) 1999 Lars Knoll ([e-mail])
 *           (C) 1999 Antti Koivisto ([e-mail])
 *           (C) 2000 Dirk A. Mueller ([e-mail])
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * $Id: render_form.h,v 1.1.1.1 2002/01/16 10:39:56 ymwei Exp $
 */
#ifndef RENDER_FORM_H
#define RENDER_FORM_H

// TODO:
//
// ### we need a generic event handling mechanism for elements replaced by widgets
// ### this is just a hack and does only work for onclick :-(
//
// ### tabbing order
// ### return == submit in some cases

#include "render_replaced.h"
#include "render_image.h"

class QWidget;
class QMultiLineEdit;
class MGHTMLView;
class QLineEdit;
class QListboxItem;

namespace DOM {
    class HTMLFormElementImpl;
    class HTMLInputElementImpl;
    class HTMLSelectElementImpl;
};

namespace khtml {

class DocLoader;

// -------------------------------------------------------------------------

class RenderFormElement : public khtml::RenderWidget
{
public:
    RenderFormElement(MGHTMLView *view, HTMLGenericFormElementImpl *element);
    virtual ~RenderFormElement();

    virtual const char *renderName() const { return "RenderForm"; }

    virtual bool isRendered() const  { return true; }

    virtual void calcMinMaxWidth();

    HTMLGenericFormElementImpl *element() { return m_element; }

    virtual void blur();
    virtual void focus();

public slots:
    virtual void slotBlurred();
    virtual void slotFocused();
    virtual void slotSelected();
    virtual void slotClicked();

protected:

    void applyLayout(int iWidth, int iHeight);
    HTMLGenericFormElementImpl *m_element;
};


// -------------------------------------------------------------------------

// generic class for all buttons
class RenderButton : public RenderFormElement
{
public:

    RenderButton(MGHTMLView *view, HTMLGenericFormElementImpl *element);

    virtual const char *renderName() const { return "RenderButton"; }

    virtual void layout();
};




// -------------------------------------------------------------------------hidden

class RenderHiddenButton : public RenderButton
{
public:
    RenderHiddenButton(MGHTMLView *view, HTMLInputElementImpl *element);

    virtual const char *renderName() const { return "RenderHiddenButton"; }
};


// -------------------------------------------------------------------------

class RenderCheckBox : public RenderButton
{
public:
    RenderCheckBox(MGHTMLView *view, HTMLInputElementImpl *element);

    virtual const char *renderName() const { return "RenderCheckBox"; }

    virtual void layout( );
public slots:
    virtual void slotStateChanged(int state);
};

#if 0
// -------------------------------------------------------------------------

class CheckBoxWidget : public QCheckBox
{
public:
    CheckBoxWidget(QWidget *parent);

protected:
    virtual void focusInEvent(QFocusEvent *);
    virtual void focusOutEvent(QFocusEvent *);

signals:
    void focused();
    void blurred();
};

#endif

// -------------------------------------------------------------------------radio

class RenderRadioButton : public RenderButton
{
public:
    RenderRadioButton(MGHTMLView *view, HTMLInputElementImpl *element);

    virtual const char *renderName() const { return "RenderRadioButton"; }

    virtual void setChecked(bool);

    virtual void layout();

 public slots:
    void slotClicked();
};


// -------------------------------------------------------------------------submit

class RenderSubmitButton : public RenderButton
{
public:

    RenderSubmitButton(MGHTMLView *view, HTMLInputElementImpl *element);
    virtual ~RenderSubmitButton();

    virtual QString defaultLabel();

    virtual void layout();
    bool clicked() { return m_clicked; }
    void setClicked(bool _clicked) { m_clicked = _clicked; }

protected:

public:
    virtual void slotClicked();

    bool m_clicked;
};



// -------------------------------------------------------------------------Reset

class RenderResetButton : public RenderSubmitButton
{
public:
    RenderResetButton(MGHTMLView *view, HTMLInputElementImpl *element);
    virtual ~RenderResetButton();

    virtual QString defaultLabel();
    virtual void slotClicked();
};




// -------------------------------------------------------------------------LineEdit

class RenderLineEdit : public RenderFormElement
{
public:
    RenderLineEdit(MGHTMLView *view, HTMLInputElementImpl *element);

    virtual void layout();

    virtual const char *renderName() const { return "RenderLineEdit"; }
    void select();

public slots:
    void slotReturnPressed();
    void slotTextChanged(const QString &string);
};





// -------------------------------------------------------------------------pushbutton

// these define <Input type=button>, and can only work with scripts

class RenderPushButton : public RenderSubmitButton
{
public:
    RenderPushButton(MGHTMLView *view, HTMLInputElementImpl *element);
    virtual ~RenderPushButton();

    virtual QString defaultLabel();

    virtual void slotClicked();
};








// -------------------------------------------------------------------------FileButton

class RenderFileButton : public RenderFormElement
{
public:
    RenderFileButton(MGHTMLView *view, HTMLInputElementImpl *element);
    virtual ~RenderFileButton();

    virtual const char *renderName() const { return "RenderFileButton"; }
    virtual void layout();
    void select();

public slots:
    virtual void slotClicked();
    virtual void slotReturnPressed();
    virtual void slotTextChanged(const QString &string);
    virtual void slotBlurred();
    virtual void slotFocused();

protected:
    bool m_clicked;
    bool m_haveFocus;
    MGWidgetEdit   *m_edit;
    MGWidgetButton *m_button;
};




// ------------------------------------------------------------------------------------------------------Select

class RenderSelect : public RenderFormElement
{
public:
    RenderSelect(MGHTMLView *view, HTMLSelectElementImpl *element);

    virtual const char *renderName() const { return "RenderSelect"; }

    virtual void layout();
    virtual void close( );

    virtual QString state();
    virtual void restoreState(const QString &);

    void setOptionsChanged(bool _optionsChanged);

    bool selectionChanged() { return m_selectionChanged; }
    void setSelectionChanged(bool _selectionChanged) { m_selectionChanged = _selectionChanged; }

    void updateSelection();

protected:
    unsigned  m_size;
    bool m_multiple;
    bool m_listBox;
    bool m_selectionChanged;
    bool m_ignoreSelectEvents;

public:
    void slotActivated(int index);
};




//-------------------------------------------------------------------------------------------------------RenderTextArea

class RenderTextArea : public RenderFormElement
{
public:
    RenderTextArea(MGHTMLView *view, HTMLTextAreaElementImpl *element);

    virtual const char *renderName() const { return "RenderTextArea"; }

    virtual void layout();
    virtual void close ( );

    QString text(); // ### remove

    void select();

    void slotTextChanged();
};




// -------------------------------------------------------------------------

class RenderImageButton : public RenderImage
{
public:
    RenderImageButton(HTMLInputElementImpl *element);
    virtual ~RenderImageButton();

    virtual const char *renderName() const { return "RenderImageButton"; }

    HTMLInputElementImpl *m_element;
};





}; //namespace

#endif