/********************************************************************************
*                                                                               *
*                           B u t t o n   W i d g e t                           *
*                                                                               *
*********************************************************************************
* Copyright (C) 1997,2024 by Jeroen van der Zijp.   All Rights Reserved.        *
*********************************************************************************
* This library is free software; you can redistribute it and/or modify          *
* it under the terms of the GNU Lesser General Public License as published by   *
* the Free Software Foundation; either version 3 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 Lesser General Public License for more details.                           *
*                                                                               *
* You should have received a copy of the GNU Lesser General Public License      *
* along with this program.  If not, see <http://www.gnu.org/licenses/>          *
********************************************************************************/
#ifndef FXBUTTON_H
#define FXBUTTON_H

#ifndef FXLABEL_H
#include "FXLabel.h"
#endif

namespace FX {


/// Button states
enum {
  STATE_UP        = 0,		  /// Button is up
  STATE_DOWN      = 1,		  /// Button is down
  STATE_ENGAGED   = 2,		  /// Button is engaged
  STATE_UNCHECKED = STATE_UP,	  /// Same as STATE_UP (used for check buttons or radio buttons)
  STATE_CHECKED   = STATE_ENGAGED /// Same as STATE_ENGAGED (used for check buttons or radio buttons)
  };


/// Button flags
enum {
  BUTTON_AUTOGRAY  = 0x00800000,  /// Automatically gray out when not updated
  BUTTON_AUTOHIDE  = 0x01000000,  /// Automatically hide button when not updated
  BUTTON_TOOLBAR   = 0x02000000,  /// Toolbar style button [flat look]
  BUTTON_DEFAULT   = 0x04000000,  /// May become default button when receiving focus
  BUTTON_INITIAL   = 0x08000000,  /// This button is the initial default button
  BUTTON_NORMAL    = (FRAME_RAISED|FRAME_THICK|JUSTIFY_NORMAL|ICON_BEFORE_TEXT)
  };


/**
* A button provides a push button, with optional icon and/or text label.
* When pressed, the button widget sends a SEL_COMMAND to its target.
* Passing the BUTTON_TOOLBAR style option gives buttons a "flat" look, and
* causes the edge of the button to be raised when the cursor moves over it.
* Passing BUTTON_DEFAULT allows the button to become the default button in
* a dialog, when the focus moves to it.  The default widget in a dialog
* is the widget which will accept the RETURN key when it is pressed.
* The BUTTON_INITIAL flag makes the button the default widget when the
* focus moves to a widget which can not itself be a default widget.
* There should be only a single button in the dialog which is the
* initial default; typically this is the OK or CLOSE button.
* The option BUTTON_AUTOGRAY (BUTTON_AUTOHIDE) causes the button to be grayed
* out (hidden) if its handler does not respond to the SEL_UPDATE message.
* This is useful when messages are delegated, for example when using a
* multiple document interface, where the ultimate destination of a message
* can be changed.
*/
class FXAPI FXButton : public FXLabel {
  FXDECLARE(FXButton)
protected:
  FXuchar  state;
protected:
  FXButton();
private:
  FXButton(const FXButton&);
  FXButton& operator=(const FXButton&);
public:
  long onPaint(FXObject*,FXSelector,void*);
  long onUpdate(FXObject*,FXSelector,void*);
  long onEnter(FXObject*,FXSelector,void*);
  long onLeave(FXObject*,FXSelector,void*);
  long onFocusIn(FXObject*,FXSelector,void*);
  long onFocusOut(FXObject*,FXSelector,void*);
  long onUngrabbed(FXObject*,FXSelector,void*);
  long onLeftBtnPress(FXObject*,FXSelector,void*);
  long onLeftBtnRelease(FXObject*,FXSelector,void*);
  long onKeyPress(FXObject*,FXSelector,void*);
  long onKeyRelease(FXObject*,FXSelector,void*);
  long onHotKeyPress(FXObject*,FXSelector,void*);
  long onHotKeyRelease(FXObject*,FXSelector,void*);
  long onCheck(FXObject*,FXSelector,void*);
  long onUncheck(FXObject*,FXSelector,void*);
  long onCmdSetValue(FXObject*,FXSelector,void*);
  long onCmdSetIntValue(FXObject*,FXSelector,void*);
  long onCmdGetIntValue(FXObject*,FXSelector,void*);
public:

  /// Construct button with text and icon
  FXButton(FXComposite* p,const FXString& text,FXIcon* ic=nullptr,FXObject* tgt=nullptr,FXSelector sel=0,FXuint opts=BUTTON_NORMAL,FXint x=0,FXint y=0,FXint w=0,FXint h=0,FXint pl=DEFAULT_PAD,FXint pr=DEFAULT_PAD,FXint pt=DEFAULT_PAD,FXint pb=DEFAULT_PAD);

  /// Returns true because a button can receive focus
  virtual FXbool canFocus() const;

  /// Move the focus to this window
  virtual void setFocus();

  /// Remove the focus from this window
  virtual void killFocus();

  /// Set as default button
  virtual void setDefault(FXuchar flag=true);

  /// Set the button state
  void setState(FXuint s);

  /// Get the button state
  FXuint getState() const { return state; }

  /// Set the button style flags
  void setButtonStyle(FXuint style);

  /// Get the button style flags
  FXuint getButtonStyle() const;

  };

}

#endif