/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (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.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
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 * decision by deleting the provisions above and replace them with the notice
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 * the provisions above, a recipient may use your version of this file under
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 * ***** END LICENSE BLOCK ***** */

#include "nsCheckButton.h"
#include "nsToolkit.h"
#include "nsColor.h"
#include "nsGUIEvent.h"
#include "nsString.h"
#include "nsStringUtil.h"
#include <windows.h>

#include "nsILookAndFeel.h"
#include "nsWidgetsCID.h"
#include "nsIComponentManager.h"

#include "nsIDeviceContext.h"

//-------------------------------------------------------------------------
nsresult
NS_NewCheckButton(nsICheckButton** aControl)
{
  NS_PRECONDITION(aControl, "null OUT ptr");
  if (nsnull == aControl) {
    return NS_ERROR_NULL_POINTER;
  }
  nsCheckButton* it = new nsCheckButton;
  if (!it) {
    return NS_ERROR_OUT_OF_MEMORY;
  }
  NS_ADDREF(it);
  *aControl = (nsICheckButton*)it;
  return NS_OK;
}


NS_IMPL_ADDREF(nsCheckButton)
NS_IMPL_RELEASE(nsCheckButton)

//-------------------------------------------------------------------------
//
// nsCheckButton constructor
//
//-------------------------------------------------------------------------
nsCheckButton::nsCheckButton() : nsWindow() , nsICheckButton(),
  mState(PR_FALSE)
{
}


//-------------------------------------------------------------------------
//
// nsCheckButton destructor
//
//-------------------------------------------------------------------------
nsCheckButton::~nsCheckButton()
{
}


/**
 * Implement the standard QueryInterface for NS_IWIDGET_IID and NS_ISUPPORTS_IID
 * @modify gpk 8/4/98
 * @param aIID The name of the class implementing the method
 * @param _classiiddef The name of the #define symbol that defines the IID
 * for the class (e.g. NS_ISUPPORTS_IID)
 * 
*/ 
nsresult nsCheckButton::QueryInterface(const nsIID& aIID, void** aInstancePtr)
{
    if (NULL == aInstancePtr) {
        return NS_ERROR_NULL_POINTER;
    }

    static NS_DEFINE_IID(kICheckButtonIID, NS_ICHECKBUTTON_IID);
    if (aIID.Equals(kICheckButtonIID)) {
        *aInstancePtr = (void*) ((nsICheckButton*)this);
        NS_ADDREF_THIS();
        return NS_OK;
    }
    return nsWindow::QueryInterface(aIID,aInstancePtr);
}


//-------------------------------------------------------------------------
//
// Set this button label
//
//-------------------------------------------------------------------------
NS_METHOD nsCheckButton::SetState(const PRBool aState)
{
  mState = aState;
  if (mWnd) {
    BOOL state;
    if (aState) 
        state = BST_CHECKED;
    else
        state = BST_UNCHECKED;
    ::SendMessage(mWnd, BM_SETCHECK, (WPARAM)state, (LPARAM)0);
  }
  return NS_OK;
}

//-------------------------------------------------------------------------
//
// Set this button label
//
//-------------------------------------------------------------------------
NS_METHOD nsCheckButton::GetState(PRBool& aState)
{
  if (::SendMessage(mWnd, BM_GETCHECK, (WPARAM)0, (LPARAM)0) == BST_CHECKED)
      aState = PR_TRUE;
  else
      aState = PR_FALSE;
  return NS_OK;
}

//-------------------------------------------------------------------------
//
// Set this button label
//
//-------------------------------------------------------------------------
NS_METHOD nsCheckButton::SetLabel(const nsString& aText)
{
  char label[256];
  aText.ToCString(label, 256);
  label[255] = '\0';
  VERIFY(::SetWindowText(mWnd, label));
  return NS_OK;
}


//-------------------------------------------------------------------------
//
// Get this button label
//
//-------------------------------------------------------------------------
NS_METHOD nsCheckButton::GetLabel(nsString& aBuffer)
{
  int actualSize = ::GetWindowTextLength(mWnd)+1;
  NS_ALLOC_CHAR_BUF(label, 256, actualSize);
  ::GetWindowText(mWnd, label, actualSize);
  aBuffer.SetLength(0);
  aBuffer.AppendWithConversion(label);
  NS_FREE_CHAR_BUF(label);
  return NS_OK;
}

//-------------------------------------------------------------------------
//
// move, paint, resizes message - ignore
//
//-------------------------------------------------------------------------
PRBool nsCheckButton::OnMove(PRInt32, PRInt32)
{
  return PR_FALSE;
}

PRBool nsCheckButton::OnPaint()
{
    return PR_FALSE;
}

PRBool nsCheckButton::OnResize(nsRect &aWindowRect)
{
    return PR_FALSE;
}

//-------------------------------------------------------------------------
//
// return the window class name and initialize the class if needed
//
//-------------------------------------------------------------------------
LPCWSTR nsCheckButton::WindowClassW()
{
    return L"BUTTON";
}

//-------------------------------------------------------------------------
//
// return the window class name and initialize the class if needed
//
//-------------------------------------------------------------------------
LPCTSTR nsCheckButton::WindowClass()
{
    return "BUTTON";
}


//-------------------------------------------------------------------------
//
// return window styles
//
//-------------------------------------------------------------------------
DWORD nsCheckButton::WindowStyle()
{
    return BS_CHECKBOX | WS_CHILD | WS_CLIPSIBLINGS; 
}


//-------------------------------------------------------------------------
//
// return window extended styles
//
//-------------------------------------------------------------------------
DWORD nsCheckButton::WindowExStyle()
{
    return 0;
}



/**
 * Renders the CheckButton for Printing
 *
 **/
NS_METHOD nsCheckButton::Paint(nsIRenderingContext& aRenderingContext,
                               const nsRect&        aDirtyRect)
{
  nsRect rect;
  float  appUnits;
  float  scale;
  nsIDeviceContext * context;
  aRenderingContext.GetDeviceContext(context);

  context->GetCanonicalPixelScale(scale);
  appUnits = context->DevUnitsToAppUnits();

  GetBoundsAppUnits(rect, appUnits);

  nscoord one   = nscoord(PRFloat64(rect.height) * 1.0/20.0);
  nscoord three = nscoord(PRFloat64(rect.width)  * 3.0/20.0);
  nscoord five  = nscoord(PRFloat64(rect.width)  * 5.0/20.0);
  nscoord six   = nscoord(PRFloat64(rect.height) * 5.0/20.0);
  nscoord eight = nscoord(PRFloat64(rect.height) * 7.0/20.0);
  nscoord nine  = nscoord(PRFloat64(rect.width)  * 9.0/20.0);
  nscoord ten   = nscoord(PRFloat64(rect.height) * 9.0/20.0);

  rect.x      += three;
  rect.y      += nscoord(PRFloat64(rect.height) * 3.5 /20.0);
  rect.width  = nscoord(PRFloat64(rect.width) * 12.0/20.0);
  rect.height = nscoord(PRFloat64(rect.height) * 12.0/20.0);

  aRenderingContext.SetColor(NS_RGB(0,0,0));

  nscoord onePixel  = nscoord((appUnits+0.6F));
  DrawScaledRect(aRenderingContext, rect, scale, appUnits);
  nscoord x = rect.x;
  nscoord y = rect.y;

  if (mState) {
    nscoord inc   = nscoord(PRFloat64(rect.height) *   0.75/20.0);
    nscoord yy = 0;
    for (nscoord i=0;i<4;i++) {
      DrawScaledLine(aRenderingContext, x+three, y+eight+yy,  x+five, y+ten+yy, scale, appUnits, PR_FALSE); // top
      DrawScaledLine(aRenderingContext, x+five,  y+ten+yy,    x+nine, y+six+yy, scale, appUnits, PR_FALSE); // top
      //aRenderingContext.DrawLine(x+three, y+eight+yy,  x+five, y+ten+yy);
      //aRenderingContext.DrawLine(x+five,  y+ten+yy,    x+nine, y+six+yy);
      yy += nscoord(scale);
    }
  }

  NS_RELEASE(context);
  return NS_OK;
}