fpdfsdk/src/pdfwindow/PWL_ScrollBar.cpp

// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com

#include "../../include/pdfwindow/PDFWindow.h"
#include "../../include/pdfwindow/PWL_Wnd.h"
#include "../../include/pdfwindow/PWL_ScrollBar.h"
#include "../../include/pdfwindow/PWL_Utils.h"

#define IsFloatZero(f)						((f) < 0.0001 && (f) > -0.0001)
#define IsFloatBigger(fa,fb)				((fa) > (fb) && !IsFloatZero((fa) - (fb)))
#define IsFloatSmaller(fa,fb)				((fa) < (fb) && !IsFloatZero((fa) - (fb)))
#define IsFloatEqual(fa,fb)					IsFloatZero((fa)-(fb))


/* ------------------------------- PWL_FLOATRANGE ------------------------------- */

PWL_FLOATRANGE::PWL_FLOATRANGE()
{
	Default();
}

PWL_FLOATRANGE::PWL_FLOATRANGE(FX_FLOAT min,FX_FLOAT max)
{
	Set(min,max);
}

void PWL_FLOATRANGE::Default()
{
	fMin = 0;
	fMax = 0;
}

void PWL_FLOATRANGE::Set(FX_FLOAT min,FX_FLOAT max)
{
	if (min > max)
	{
		fMin = max;
		fMax = min;
	}
	else
	{
		fMin = min;
		fMax = max;
	}
}

FX_BOOL	PWL_FLOATRANGE::In(FX_FLOAT x) const
{
	return (IsFloatBigger(x,fMin) || IsFloatEqual(x, fMin)) && 
		(IsFloatSmaller(x, fMax) || IsFloatEqual(x, fMax));
}

FX_FLOAT PWL_FLOATRANGE::GetWidth() const
{
	return fMax - fMin;
}

/* ------------------------------- PWL_SCROLL_PRIVATEDATA ------------------------------- */

PWL_SCROLL_PRIVATEDATA::PWL_SCROLL_PRIVATEDATA()
{
	Default();
}

void PWL_SCROLL_PRIVATEDATA::Default()
{
	ScrollRange.Default();
	fScrollPos = ScrollRange.fMin;
	fClientWidth = 0;
	fBigStep = 10;
	fSmallStep = 1;
}

void PWL_SCROLL_PRIVATEDATA::SetScrollRange(FX_FLOAT min,FX_FLOAT max)
{
	ScrollRange.Set(min,max);

	if (IsFloatSmaller(fScrollPos, ScrollRange.fMin))
		fScrollPos = ScrollRange.fMin;
	if (IsFloatBigger(fScrollPos, ScrollRange.fMax))
		fScrollPos = ScrollRange.fMax;		
}

void PWL_SCROLL_PRIVATEDATA::SetClientWidth(FX_FLOAT width)
{
	fClientWidth = width;
}

void PWL_SCROLL_PRIVATEDATA::SetSmallStep(FX_FLOAT step)
{
	fSmallStep = step;
}

void PWL_SCROLL_PRIVATEDATA::SetBigStep(FX_FLOAT step)
{
	fBigStep = step;
}

FX_BOOL PWL_SCROLL_PRIVATEDATA::SetPos(FX_FLOAT pos)
{
	if (ScrollRange.In(pos))
	{
		fScrollPos = pos;
		return TRUE;
	}
	return FALSE;
}

void PWL_SCROLL_PRIVATEDATA::AddSmall()
{
	if (!SetPos(fScrollPos + fSmallStep))
		SetPos(ScrollRange.fMax);
}

void PWL_SCROLL_PRIVATEDATA::SubSmall()
{
	if (!SetPos(fScrollPos - fSmallStep))
		SetPos(ScrollRange.fMin);
}

void PWL_SCROLL_PRIVATEDATA::AddBig()
{
	if (!SetPos(fScrollPos + fBigStep))
		SetPos(ScrollRange.fMax);		
}

void PWL_SCROLL_PRIVATEDATA::SubBig()
{
	if (!SetPos(fScrollPos - fBigStep))
		SetPos(ScrollRange.fMin);
}

/* ------------------------------- CPWL_SBButton ------------------------------- */

CPWL_SBButton::CPWL_SBButton(PWL_SCROLLBAR_TYPE eScrollBarType,PWL_SBBUTTON_TYPE eButtonType)
{
	m_eScrollBarType = eScrollBarType;
	m_eSBButtonType = eButtonType;

	m_bMouseDown = FALSE;
}

CPWL_SBButton::~CPWL_SBButton()
{

}

CFX_ByteString CPWL_SBButton::GetClassName() const
{
	return "CPWL_SBButton";
}

void CPWL_SBButton::OnCreate(PWL_CREATEPARAM & cp)
{
	cp.eCursorType = FXCT_ARROW;
}

void CPWL_SBButton::GetThisAppearanceStream(CFX_ByteTextBuf & sAppStream)
{
	CPWL_Wnd::GetThisAppearanceStream(sAppStream);

	if (!IsVisible()) return;

	CFX_ByteTextBuf sButton;

	CPDF_Rect rectWnd = GetWindowRect();

	if (rectWnd.IsEmpty()) return;

	sAppStream << "q\n";

	CPDF_Point ptCenter = this->GetCenterPoint();

	switch (this->m_eScrollBarType)
	{
		case SBT_HSCROLL:
			switch (this->m_eSBButtonType)
			{
				case PSBT_MIN:
					{
						CPDF_Point pt1(ptCenter.x - PWL_TRIANGLE_HALFLEN * 0.5f,ptCenter.y);
						CPDF_Point pt2(ptCenter.x + PWL_TRIANGLE_HALFLEN * 0.5f,ptCenter.y + PWL_TRIANGLE_HALFLEN);
						CPDF_Point pt3(ptCenter.x + PWL_TRIANGLE_HALFLEN * 0.5f,ptCenter.y - PWL_TRIANGLE_HALFLEN);

						if (rectWnd.right - rectWnd.left > PWL_TRIANGLE_HALFLEN * 2 &&
							rectWnd.top - rectWnd.bottom > PWL_TRIANGLE_HALFLEN )
						{
							sButton << "0 g\n";
							sButton << pt1.x << " " << pt1.y << " m\n";
							sButton << pt2.x << " " << pt2.y << " l\n";
							sButton << pt3.x << " " << pt3.y << " l\n";
							sButton << pt1.x << " " << pt1.y << " l f\n";

							sAppStream << sButton;	
						}
					}
					break;
				case PSBT_MAX:
					{
						CPDF_Point pt1(ptCenter.x + PWL_TRIANGLE_HALFLEN * 0.5f,ptCenter.y);
						CPDF_Point pt2(ptCenter.x - PWL_TRIANGLE_HALFLEN * 0.5f,ptCenter.y + PWL_TRIANGLE_HALFLEN);
						CPDF_Point pt3(ptCenter.x - PWL_TRIANGLE_HALFLEN * 0.5f,ptCenter.y - PWL_TRIANGLE_HALFLEN);

						if (rectWnd.right - rectWnd.left > PWL_TRIANGLE_HALFLEN * 2 &&
							rectWnd.top - rectWnd.bottom > PWL_TRIANGLE_HALFLEN )
						{
							sButton << "0 g\n";
							sButton << pt1.x << " " << pt1.y << " m\n";
							sButton << pt2.x << " " << pt2.y << " l\n";
							sButton << pt3.x << " " << pt3.y << " l\n";
							sButton << pt1.x << " " << pt1.y << " l f\n";

							sAppStream << sButton;	
						}
					}
					break;
				default:
					break;
			}
			break;
		case SBT_VSCROLL:
			switch(this->m_eSBButtonType)
			{
				case PSBT_MIN:
					{
						CPDF_Point pt1(ptCenter.x - PWL_TRIANGLE_HALFLEN,ptCenter.y - PWL_TRIANGLE_HALFLEN * 0.5f);
						CPDF_Point pt2(ptCenter.x + PWL_TRIANGLE_HALFLEN,ptCenter.y - PWL_TRIANGLE_HALFLEN * 0.5f);
						CPDF_Point pt3(ptCenter.x,ptCenter.y + PWL_TRIANGLE_HALFLEN * 0.5f);

						if (rectWnd.right - rectWnd.left > PWL_TRIANGLE_HALFLEN * 2 &&
							rectWnd.top - rectWnd.bottom > PWL_TRIANGLE_HALFLEN )
						{
							sButton << "0 g\n";
							sButton << pt1.x << " " << pt1.y << " m\n";
							sButton << pt2.x << " " << pt2.y << " l\n";
							sButton << pt3.x << " " << pt3.y << " l\n";
							sButton << pt1.x << " " << pt1.y << " l f\n";

							sAppStream << sButton;	
						}
					}
					break;
				case PSBT_MAX:
					{
						CPDF_Point pt1(ptCenter.x - PWL_TRIANGLE_HALFLEN,ptCenter.y + PWL_TRIANGLE_HALFLEN * 0.5f);
						CPDF_Point pt2(ptCenter.x + PWL_TRIANGLE_HALFLEN,ptCenter.y + PWL_TRIANGLE_HALFLEN * 0.5f);
						CPDF_Point pt3(ptCenter.x,ptCenter.y - PWL_TRIANGLE_HALFLEN * 0.5f);

						if (rectWnd.right - rectWnd.left > PWL_TRIANGLE_HALFLEN * 2 &&
							rectWnd.top - rectWnd.bottom > PWL_TRIANGLE_HALFLEN )
						{
							sButton << "0 g\n";
							sButton << pt1.x << " " << pt1.y << " m\n";
							sButton << pt2.x << " " << pt2.y << " l\n";
							sButton << pt3.x << " " << pt3.y << " l\n";
							sButton << pt1.x << " " << pt1.y << " l f\n";

							sAppStream << sButton;	
						}
					}
					break;
				default:
					break;
			}
			break;
		default:
			break;
	}

	sAppStream << "Q\n";
}

void CPWL_SBButton::DrawThisAppearance(CFX_RenderDevice* pDevice, CPDF_Matrix* pUser2Device)
{
	if (!IsVisible()) return;

	CPDF_Rect rectWnd = GetWindowRect();
	if (rectWnd.IsEmpty()) return;

	CPDF_Point ptCenter = this->GetCenterPoint();
	FX_INT32 nTransparancy = this->GetTransparency();

	switch (this->m_eScrollBarType)
	{
	case SBT_HSCROLL:
		CPWL_Wnd::DrawThisAppearance(pDevice,pUser2Device);
		switch (this->m_eSBButtonType)
		{
		case PSBT_MIN:
			{
				CPDF_Point pt1(ptCenter.x - PWL_TRIANGLE_HALFLEN * 0.5f,ptCenter.y);
				CPDF_Point pt2(ptCenter.x + PWL_TRIANGLE_HALFLEN * 0.5f,ptCenter.y + PWL_TRIANGLE_HALFLEN);
				CPDF_Point pt3(ptCenter.x + PWL_TRIANGLE_HALFLEN * 0.5f,ptCenter.y - PWL_TRIANGLE_HALFLEN);

				if (rectWnd.right - rectWnd.left > PWL_TRIANGLE_HALFLEN * 2 &&
					rectWnd.top - rectWnd.bottom > PWL_TRIANGLE_HALFLEN )
				{
					CFX_PathData path;

					path.SetPointCount(4);
					path.SetPoint(0, pt1.x, pt1.y, FXPT_MOVETO);
					path.SetPoint(1, pt2.x, pt2.y, FXPT_LINETO);
					path.SetPoint(2, pt3.x, pt3.y, FXPT_LINETO);
					path.SetPoint(3, pt1.x, pt1.y, FXPT_LINETO);

					pDevice->DrawPath(&path, pUser2Device, NULL, 
						CPWL_Utils::PWLColorToFXColor(PWL_DEFAULT_BLACKCOLOR,nTransparancy), 
						0, FXFILL_ALTERNATE);
				}
			}
			break;
		case PSBT_MAX:
			{
				CPDF_Point pt1(ptCenter.x + PWL_TRIANGLE_HALFLEN * 0.5f,ptCenter.y);
				CPDF_Point pt2(ptCenter.x - PWL_TRIANGLE_HALFLEN * 0.5f,ptCenter.y + PWL_TRIANGLE_HALFLEN);
				CPDF_Point pt3(ptCenter.x - PWL_TRIANGLE_HALFLEN * 0.5f,ptCenter.y - PWL_TRIANGLE_HALFLEN);

				if (rectWnd.right - rectWnd.left > PWL_TRIANGLE_HALFLEN * 2 &&
					rectWnd.top - rectWnd.bottom > PWL_TRIANGLE_HALFLEN )
				{
					CFX_PathData path;

					path.SetPointCount(4);
					path.SetPoint(0, pt1.x, pt1.y, FXPT_MOVETO);
					path.SetPoint(1, pt2.x, pt2.y, FXPT_LINETO);
					path.SetPoint(2, pt3.x, pt3.y, FXPT_LINETO);
					path.SetPoint(3, pt1.x, pt1.y, FXPT_LINETO);

					pDevice->DrawPath(&path, pUser2Device, NULL, 
						CPWL_Utils::PWLColorToFXColor(PWL_DEFAULT_BLACKCOLOR,nTransparancy), 
						0, FXFILL_ALTERNATE);	
				}
			}
			break;
		default:
			break;
		}
		break;
	case SBT_VSCROLL:
		switch(this->m_eSBButtonType)
		{
		case PSBT_MIN:
			{
				//draw border
				CPDF_Rect rcDraw = rectWnd;
				CPWL_Utils::DrawStrokeRect(pDevice, pUser2Device, rcDraw, 
					ArgbEncode(nTransparancy,100,100,100),0.0f);

				//draw inner border
				rcDraw = CPWL_Utils::DeflateRect(rectWnd,0.5f);
				CPWL_Utils::DrawStrokeRect(pDevice, pUser2Device, rcDraw, 
					ArgbEncode(nTransparancy,255,255,255),1.0f);

				//draw background

				rcDraw = CPWL_Utils::DeflateRect(rectWnd,1.0f);

				if (this->IsEnabled())
					CPWL_Utils::DrawShadow(pDevice, pUser2Device, TRUE, FALSE, rcDraw, nTransparancy, 80, 220);
				else
					CPWL_Utils::DrawFillRect(pDevice, pUser2Device, rcDraw, ArgbEncode(255,255,255,255));

				//draw arrow

				if (rectWnd.top - rectWnd.bottom > 6.0f )
				{
					FX_FLOAT fX = rectWnd.left + 1.5f;
					FX_FLOAT fY = rectWnd.bottom;
					CPDF_Point pts[7] = {
								CPDF_Point(fX+2.5f, fY+4.0f),
								CPDF_Point(fX+2.5f, fY+3.0f),
								CPDF_Point(fX+4.5f, fY+5.0f),
								CPDF_Point(fX+6.5f, fY+3.0f),
								CPDF_Point(fX+6.5f, fY+4.0f),
								CPDF_Point(fX+4.5f, fY+6.0f),
								CPDF_Point(fX+2.5f, fY+4.0f)};
					

					if (this->IsEnabled())
						CPWL_Utils::DrawFillArea(pDevice, pUser2Device, pts, 7, ArgbEncode(nTransparancy,255,255,255));
					else
						CPWL_Utils::DrawFillArea(pDevice, pUser2Device, pts, 7, 
							CPWL_Utils::PWLColorToFXColor(PWL_DEFAULT_HEAVYGRAYCOLOR,255));
				}
			}
			break;
		case PSBT_MAX:
			{
				//draw border
				CPDF_Rect rcDraw = rectWnd;
				CPWL_Utils::DrawStrokeRect(pDevice, pUser2Device, rcDraw, 
					ArgbEncode(nTransparancy,100,100,100),0.0f);
				
				//draw inner border
				rcDraw = CPWL_Utils::DeflateRect(rectWnd,0.5f);
				CPWL_Utils::DrawStrokeRect(pDevice, pUser2Device, rcDraw, 
					ArgbEncode(nTransparancy,255,255,255),1.0f);

				//draw background
				rcDraw = CPWL_Utils::DeflateRect(rectWnd,1.0f);
				if (this->IsEnabled())
					CPWL_Utils::DrawShadow(pDevice, pUser2Device, TRUE, FALSE, rcDraw, nTransparancy, 80, 220);
				else
					CPWL_Utils::DrawFillRect(pDevice, pUser2Device, rcDraw, ArgbEncode(255,255,255,255));

				//draw arrow

				if (rectWnd.top - rectWnd.bottom > 6.0f )
				{
					FX_FLOAT fX = rectWnd.left + 1.5f;
					FX_FLOAT fY = rectWnd.bottom;

					CPDF_Point pts[7] = {
								CPDF_Point(fX+2.5f, fY+5.0f),
								CPDF_Point(fX+2.5f, fY+6.0f),
								CPDF_Point(fX+4.5f, fY+4.0f),
								CPDF_Point(fX+6.5f, fY+6.0f),
								CPDF_Point(fX+6.5f, fY+5.0f),
								CPDF_Point(fX+4.5f, fY+3.0f),
								CPDF_Point(fX+2.5f, fY+5.0f)};
					

					if (this->IsEnabled())
						CPWL_Utils::DrawFillArea(pDevice, pUser2Device, pts, 7, ArgbEncode(nTransparancy,255,255,255));
					else
						CPWL_Utils::DrawFillArea(pDevice, pUser2Device, pts, 7, 
							CPWL_Utils::PWLColorToFXColor(PWL_DEFAULT_HEAVYGRAYCOLOR,255));
				}
			}
			break;
		case PSBT_POS:
			{
				//CPWL_Wnd::DrawThisAppearance(pDevice,pUser2Device);

				//draw border
				CPDF_Rect rcDraw = rectWnd;
				CPWL_Utils::DrawStrokeRect(pDevice, pUser2Device, rcDraw, 
					ArgbEncode(nTransparancy,100,100,100),0.0f);
				
				//draw inner border
				rcDraw = CPWL_Utils::DeflateRect(rectWnd,0.5f);
				CPWL_Utils::DrawStrokeRect(pDevice, pUser2Device, rcDraw, 
					ArgbEncode(nTransparancy,255,255,255),1.0f);

				if (this->IsEnabled())
				{
					//draw shadow effect						
					
					CPDF_Point ptTop = CPDF_Point(rectWnd.left,rectWnd.top-1.0f);
					CPDF_Point ptBottom = CPDF_Point(rectWnd.left,rectWnd.bottom+1.0f);

					ptTop.x += 1.5f;
					ptBottom.x += 1.5f;
					
					CPWL_Utils::DrawStrokeLine(pDevice, pUser2Device, ptTop, ptBottom, 
						ArgbEncode(nTransparancy,210,210,210),1.0f);

					ptTop.x += 1.0f;
					ptBottom.x += 1.0f;
					
					CPWL_Utils::DrawStrokeLine(pDevice, pUser2Device, ptTop, ptBottom, 
						ArgbEncode(nTransparancy,220,220,220),1.0f);

					ptTop.x += 1.0f;
					ptBottom.x += 1.0f;
					
					CPWL_Utils::DrawStrokeLine(pDevice, pUser2Device, ptTop, ptBottom, 
						ArgbEncode(nTransparancy,240,240,240),1.0f);

					ptTop.x += 1.0f;
					ptBottom.x += 1.0f;
					
					CPWL_Utils::DrawStrokeLine(pDevice, pUser2Device, ptTop, ptBottom, 
						ArgbEncode(nTransparancy,240,240,240),1.0f);

					ptTop.x += 1.0f;
					ptBottom.x += 1.0f;
					
					CPWL_Utils::DrawStrokeLine(pDevice, pUser2Device, ptTop, ptBottom, 
						ArgbEncode(nTransparancy,210,210,210),1.0f);

					ptTop.x += 1.0f;
					ptBottom.x += 1.0f;
					
					CPWL_Utils::DrawStrokeLine(pDevice, pUser2Device, ptTop, ptBottom, 
						ArgbEncode(nTransparancy,180,180,180),1.0f);

					ptTop.x += 1.0f;
					ptBottom.x += 1.0f;
					
					CPWL_Utils::DrawStrokeLine(pDevice, pUser2Device, ptTop, ptBottom, 
						ArgbEncode(nTransparancy,150,150,150),1.0f);

					ptTop.x += 1.0f;
					ptBottom.x += 1.0f;
					
					CPWL_Utils::DrawStrokeLine(pDevice, pUser2Device, ptTop, ptBottom, 
						ArgbEncode(nTransparancy,150,150,150),1.0f);

					ptTop.x += 1.0f;
					ptBottom.x += 1.0f;
					
					CPWL_Utils::DrawStrokeLine(pDevice, pUser2Device, ptTop, ptBottom, 
						ArgbEncode(nTransparancy,180,180,180),1.0f);

					ptTop.x += 1.0f;
					ptBottom.x += 1.0f;
					
					CPWL_Utils::DrawStrokeLine(pDevice, pUser2Device, ptTop, ptBottom, 
						ArgbEncode(nTransparancy,210,210,210),1.0f);
				}
				else
				{
					CPWL_Utils::DrawFillRect(pDevice, pUser2Device, rcDraw, ArgbEncode(255,255,255,255));
				}

				//draw friction

				if (rectWnd.Height() > 8.0f)
				{
					FX_COLORREF crStroke = ArgbEncode(nTransparancy,120,120,120);
					if (!this->IsEnabled())
						crStroke = CPWL_Utils::PWLColorToFXColor(PWL_DEFAULT_HEAVYGRAYCOLOR,255);

					FX_FLOAT nFrictionWidth = 5.0f;
					FX_FLOAT nFrictionHeight = 5.5f;

					CPDF_Point ptLeft = CPDF_Point(ptCenter.x - nFrictionWidth / 2.0f, ptCenter.y - nFrictionHeight / 2.0f + 0.5f);
					CPDF_Point ptRight = CPDF_Point(ptCenter.x + nFrictionWidth / 2.0f, ptCenter.y - nFrictionHeight / 2.0f + 0.5f);

					CPWL_Utils::DrawStrokeLine(pDevice, pUser2Device, ptLeft, ptRight, 
						crStroke,1.0f);

					ptLeft.y += 2.0f;
					ptRight.y += 2.0f;

					CPWL_Utils::DrawStrokeLine(pDevice, pUser2Device, ptLeft, ptRight, 
						crStroke,1.0f);

					ptLeft.y += 2.0f;
					ptRight.y += 2.0f;

					CPWL_Utils::DrawStrokeLine(pDevice, pUser2Device, ptLeft, ptRight, 
						crStroke,1.0f);

					/*
					ptLeft.y += 1.5f;
					ptRight.y += 1.5f;

					CPWL_Utils::DrawStrokeLine(pDevice, pUser2Device, ptLeft, ptRight, 
						ArgbEncode(nTransparancy,150,150,150),1.0f);
						*/
				}
			}
			break;
		default:
			break;
		}
		break;
	default:
		break;
	}
}

FX_BOOL CPWL_SBButton::OnLButtonDown(const CPDF_Point & point, FX_DWORD nFlag)
{
	CPWL_Wnd::OnLButtonDown(point,nFlag);

	if (CPWL_Wnd * pParent = GetParentWindow())
		pParent->OnNotify(this,PNM_LBUTTONDOWN,0,(FX_INTPTR)&point);

	m_bMouseDown = TRUE;
	SetCapture();

	return TRUE;
}

FX_BOOL CPWL_SBButton::OnLButtonUp(const CPDF_Point & point, FX_DWORD nFlag)
{
	CPWL_Wnd::OnLButtonUp(point,nFlag);

	if (CPWL_Wnd * pParent = GetParentWindow())
		pParent->OnNotify(this,PNM_LBUTTONUP,0,(FX_INTPTR)&point);

	m_bMouseDown = FALSE;
	ReleaseCapture();

	return TRUE;
}

FX_BOOL CPWL_SBButton::OnMouseMove(const CPDF_Point & point, FX_DWORD nFlag)
{
	CPWL_Wnd::OnMouseMove(point,nFlag);

	if (CPWL_Wnd * pParent = GetParentWindow())
	{		
		pParent->OnNotify(this,PNM_MOUSEMOVE,0,(FX_INTPTR)&point);

		/*
		if (m_bMouseDown && (m_eSBButtonType == PSBT_MIN || m_eSBButtonType == PSBT_MAX))
		{
			if (!pParent->OnNotify(this,PNM_LBUTTONDOWN,nFlags,(FX_INTPTR)&point))
				return FALSE;
		}
		*/
	}

	return TRUE;
}

/* ------------------------------- CPWL_ScrollBar ---------------------------------- */

CPWL_ScrollBar::CPWL_ScrollBar(PWL_SCROLLBAR_TYPE sbType):
	m_sbType(sbType),
	m_pMinButton(NULL),
	m_pMaxButton(NULL),
	m_pPosButton(NULL),
	m_bMouseDown(FALSE),
	m_bMinOrMax(FALSE),
	m_bNotifyForever(TRUE)
{
}

CPWL_ScrollBar::~CPWL_ScrollBar()
{
}

CFX_ByteString CPWL_ScrollBar::GetClassName() const
{
	return "CPWL_ScrollBar";
}

void CPWL_ScrollBar::OnCreate(PWL_CREATEPARAM & cp)
{
	cp.eCursorType = FXCT_ARROW;
}

void CPWL_ScrollBar::RePosChildWnd()
{
	CPDF_Rect rcClient = this->GetClientRect();

/*
	switch(m_sbType)
	{
		case SBT_HSCROLL:
			if (rcClient.right - rcClient.left < PWL_SCROLLBAR_WIDTH ||
				rcClient.top - rcClient.bottom < PWL_SCROLLBAR_WIDTH)
			{
				SetVisible(FALSE);
			}
			break;
		case SBT_VSCROLL:
			if (rcClient.right - rcClient.left < PWL_SCROLLBAR_WIDTH ||
				rcClient.top - rcClient.bottom < PWL_SCROLLBAR_WIDTH)
			{
				SetVisible(FALSE);
			}
			break;
	}	
*/
	CPDF_Rect rcMinButton,rcMaxButton;

	FX_FLOAT fBWidth = 0;

	switch (m_sbType)
	{
	case SBT_HSCROLL:
		if (rcClient.right - rcClient.left > PWL_SCROLLBAR_BUTTON_WIDTH * 2 + PWL_SCROLLBAR_POSBUTTON_MINWIDTH + 2)
		{
			rcMinButton = CPDF_Rect(rcClient.left,rcClient.bottom,
				rcClient.left + PWL_SCROLLBAR_BUTTON_WIDTH,rcClient.top);
			rcMaxButton = CPDF_Rect(rcClient.right - PWL_SCROLLBAR_BUTTON_WIDTH,rcClient.bottom,
				rcClient.right,rcClient.top);
		}
		else
		{
			fBWidth = (rcClient.right - rcClient.left - PWL_SCROLLBAR_POSBUTTON_MINWIDTH - 2) / 2;

			if (fBWidth > 0)
			{
				rcMinButton = CPDF_Rect(rcClient.left,rcClient.bottom,
					rcClient.left + fBWidth,rcClient.top);
				rcMaxButton = CPDF_Rect(rcClient.right - fBWidth,rcClient.bottom,
					rcClient.right,rcClient.top);
			}
			else SetVisible(FALSE);
		}
		break;
	case SBT_VSCROLL:
		if (IsFloatBigger(rcClient.top - rcClient.bottom, PWL_SCROLLBAR_BUTTON_WIDTH * 2 + PWL_SCROLLBAR_POSBUTTON_MINWIDTH + 2))
		{
			rcMinButton = CPDF_Rect(rcClient.left,rcClient.top - PWL_SCROLLBAR_BUTTON_WIDTH,
				rcClient.right,rcClient.top);
			rcMaxButton = CPDF_Rect(rcClient.left,rcClient.bottom,
				rcClient.right,rcClient.bottom + PWL_SCROLLBAR_BUTTON_WIDTH);
		}
		else
		{
			fBWidth = (rcClient.top - rcClient.bottom - PWL_SCROLLBAR_POSBUTTON_MINWIDTH - 2) / 2;

			if (IsFloatBigger(fBWidth, 0))
			{
				rcMinButton = CPDF_Rect(rcClient.left,rcClient.top - fBWidth,
					rcClient.right,rcClient.top);
				rcMaxButton = CPDF_Rect(rcClient.left,rcClient.bottom,
					rcClient.right,rcClient.bottom + fBWidth);
			}
			else SetVisible(FALSE);
		}
		break;
	}	
	
//	if (IsVisible())
	{
		if (m_pMinButton)
			m_pMinButton->Move(rcMinButton,TRUE,FALSE);
		
		if (m_pMaxButton)
			m_pMaxButton->Move(rcMaxButton,TRUE,FALSE);

		MovePosButton(FALSE);
	}
}

void CPWL_ScrollBar::GetThisAppearanceStream(CFX_ByteTextBuf & sAppStream)
{
	CPDF_Rect rectWnd = GetWindowRect();

	if (IsVisible() && !rectWnd.IsEmpty())
	{
		CFX_ByteTextBuf sButton;		

		sButton << "q\n";
		sButton << "0 w\n" << CPWL_Utils::GetColorAppStream(GetBackgroundColor(),TRUE);
		sButton << rectWnd.left << " " << rectWnd.bottom << " "
				<< rectWnd.right - rectWnd.left << " " << rectWnd.top - rectWnd.bottom << " re b Q\n";	

		sAppStream << sButton;	
	}
}

void CPWL_ScrollBar::DrawThisAppearance(CFX_RenderDevice* pDevice, CPDF_Matrix* pUser2Device)
{
//	CPWL_Wnd::DrawThisAppearance(pDevice,pUser2Device);
	CPDF_Rect rectWnd = GetWindowRect();

	if (IsVisible() && !rectWnd.IsEmpty())
	{
		CPWL_Utils::DrawFillRect(pDevice, pUser2Device, rectWnd, this->GetBackgroundColor(), GetTransparency());

		CPWL_Utils::DrawStrokeLine(pDevice, pUser2Device, 
			CPDF_Point(rectWnd.left+2.0f,rectWnd.top-2.0f), CPDF_Point(rectWnd.left+2.0f,rectWnd.bottom+2.0f), 
			ArgbEncode(this->GetTransparency(),100,100,100),1.0f);

		CPWL_Utils::DrawStrokeLine(pDevice, pUser2Device, 
			CPDF_Point(rectWnd.right-2.0f,rectWnd.top-2.0f), CPDF_Point(rectWnd.right-2.0f,rectWnd.bottom+2.0f), 
			ArgbEncode(this->GetTransparency(),100,100,100),1.0f);
	}
}

FX_BOOL CPWL_ScrollBar::OnLButtonDown(const CPDF_Point & point, FX_DWORD nFlag)
{
	CPWL_Wnd::OnLButtonDown(point,nFlag);

	//SetFocus();

	if (HasFlag(PWS_AUTOTRANSPARENT))
	{
		if (GetTransparency() != 255)
		{
			SetTransparency(255);
			InvalidateRect();
		}
	}

	CPDF_Rect rcMinArea,rcMaxArea;

	if (m_pPosButton && m_pPosButton->IsVisible())
	{
		CPDF_Rect rcClient = this->GetClientRect();
		CPDF_Rect rcPosButton = m_pPosButton->GetWindowRect();

		switch (m_sbType)
		{
		case SBT_HSCROLL:
			rcMinArea = CPDF_Rect(rcClient.left + PWL_SCROLLBAR_BUTTON_WIDTH,rcClient.bottom,
							rcPosButton.left,rcClient.top);
			rcMaxArea = CPDF_Rect(rcPosButton.right,rcClient.bottom,
							rcClient.right - PWL_SCROLLBAR_BUTTON_WIDTH,rcClient.top);

			break;
		case SBT_VSCROLL:
			rcMinArea = CPDF_Rect(rcClient.left,rcPosButton.top,
							rcClient.right,rcClient.top - PWL_SCROLLBAR_BUTTON_WIDTH);
			rcMaxArea = CPDF_Rect(rcClient.left,rcClient.bottom + PWL_SCROLLBAR_BUTTON_WIDTH,
							rcClient.right,rcPosButton.bottom);
			break;
		}

		rcMinArea.Normalize();
		rcMaxArea.Normalize();

		if (rcMinArea.Contains(point.x,point.y))
		{
			m_sData.SubBig();
			MovePosButton(TRUE);
			NotifyScrollWindow();
		}

		if (rcMaxArea.Contains(point.x,point.y))
		{
			m_sData.AddBig();
			MovePosButton(TRUE);
			NotifyScrollWindow();
		}
	}

	return TRUE;
}

FX_BOOL CPWL_ScrollBar::OnLButtonUp(const CPDF_Point & point, FX_DWORD nFlag)
{
	CPWL_Wnd::OnLButtonUp(point,nFlag);

	if (HasFlag(PWS_AUTOTRANSPARENT))
	{
		if (GetTransparency() != PWL_SCROLLBAR_TRANSPARANCY)
		{
			SetTransparency(PWL_SCROLLBAR_TRANSPARANCY);
			InvalidateRect();
		}
	}

	EndTimer();
	m_bMouseDown = FALSE;

	return TRUE;
}

void CPWL_ScrollBar::OnNotify(CPWL_Wnd* pWnd, FX_DWORD msg, FX_INTPTR wParam, FX_INTPTR lParam)
{
	CPWL_Wnd::OnNotify(pWnd,msg,wParam,lParam);

	switch (msg)
	{
	case PNM_LBUTTONDOWN:			
		if (pWnd == m_pMinButton)
		{
			OnMinButtonLBDown(*(CPDF_Point*)lParam);
		}

		if (pWnd == m_pMaxButton)
		{
			OnMaxButtonLBDown(*(CPDF_Point*)lParam);
		}

		if (pWnd == m_pPosButton)
		{
			OnPosButtonLBDown(*(CPDF_Point*)lParam);				
		}
		break;
	case PNM_LBUTTONUP:
		if (pWnd == m_pMinButton)
		{
			OnMinButtonLBUp(*(CPDF_Point*)lParam);		
		}

		if (pWnd == m_pMaxButton)
		{
			OnMaxButtonLBUp(*(CPDF_Point*)lParam);				
		}

		if (pWnd == m_pPosButton)
		{
			OnPosButtonLBUp(*(CPDF_Point*)lParam);			
		}
		break;
	case PNM_MOUSEMOVE:
		if (pWnd == m_pMinButton)
		{
			OnMinButtonMouseMove(*(CPDF_Point*)lParam);
		}

		if (pWnd == m_pMaxButton)
		{
			OnMaxButtonMouseMove(*(CPDF_Point*)lParam);				
		}

		if (pWnd == m_pPosButton)
		{
			OnPosButtonMouseMove(*(CPDF_Point*)lParam);				
		}
		break;
	case PNM_SETSCROLLINFO:
		{
			if (PWL_SCROLL_INFO * pInfo = (PWL_SCROLL_INFO*)lParam)
			{
				if (FXSYS_memcmp(&m_OriginInfo, pInfo, sizeof(PWL_SCROLL_INFO)) != 0)
				{
					m_OriginInfo = *pInfo;
					FX_FLOAT fMax = pInfo->fContentMax - pInfo->fContentMin - pInfo->fPlateWidth;
					fMax = fMax > 0.0f ? fMax : 0.0f;
					this->SetScrollRange(0,fMax, pInfo->fPlateWidth);
					this->SetScrollStep(pInfo->fBigStep,pInfo->fSmallStep);
				}
			}
		}
		break;
	case PNM_SETSCROLLPOS:
		{
			FX_FLOAT fPos = *(FX_FLOAT*)lParam;
			switch (this->m_sbType)
			{
			case SBT_HSCROLL:
				fPos = fPos - m_OriginInfo.fContentMin;
				break;
			case SBT_VSCROLL:
				fPos = m_OriginInfo.fContentMax - fPos;
				break;
			}
			this->SetScrollPos(fPos);
		}
		break;
	}
}

void CPWL_ScrollBar::CreateButtons(const PWL_CREATEPARAM & cp)
{
	PWL_CREATEPARAM	scp = cp;
	scp.pParentWnd = this;
	scp.dwBorderWidth = 2;
	scp.nBorderStyle = PBS_BEVELED;
	
	scp.dwFlags = PWS_VISIBLE | PWS_CHILD | PWS_BORDER | PWS_BACKGROUND | PWS_NOREFRESHCLIP;

	if (!m_pMinButton) 
	{
		m_pMinButton = new CPWL_SBButton(m_sbType,PSBT_MIN);
		m_pMinButton->Create(scp);
	}

	if (!m_pMaxButton)
	{
		m_pMaxButton = new CPWL_SBButton(m_sbType,PSBT_MAX);
		m_pMaxButton->Create(scp);
	}

	if (!m_pPosButton)
	{
		m_pPosButton = new CPWL_SBButton(m_sbType,PSBT_POS);
		m_pPosButton->SetVisible(FALSE);
		m_pPosButton->Create(scp);
	}
}

FX_FLOAT CPWL_ScrollBar::GetScrollBarWidth() const
{
	if (!IsVisible()) return 0;

	return PWL_SCROLLBAR_WIDTH;
}

void CPWL_ScrollBar::SetScrollRange(FX_FLOAT fMin,FX_FLOAT fMax,FX_FLOAT fClientWidth)
{
	if (m_pPosButton)
	{
		m_sData.SetScrollRange(fMin,fMax);
		m_sData.SetClientWidth(fClientWidth);

		if (IsFloatSmaller(m_sData.ScrollRange.GetWidth(), 0.0f))
		{
			m_pPosButton->SetVisible(FALSE);
		}
		else
		{
			m_pPosButton->SetVisible(TRUE);	
			MovePosButton(TRUE);
		}
	}
}

void CPWL_ScrollBar::SetScrollPos(FX_FLOAT fPos)
{
	FX_FLOAT fOldPos = m_sData.fScrollPos;

	m_sData.SetPos(fPos);

	if (!IsFloatEqual(m_sData.fScrollPos, fOldPos))
		MovePosButton(TRUE);
}

void CPWL_ScrollBar::SetScrollStep(FX_FLOAT fBigStep,FX_FLOAT fSmallStep)
{
	m_sData.SetBigStep(fBigStep);
	m_sData.SetSmallStep(fSmallStep);
}

void CPWL_ScrollBar::MovePosButton(FX_BOOL bRefresh)
{
	ASSERT (m_pPosButton != NULL);
	ASSERT (m_pMinButton != NULL);
	ASSERT (m_pMaxButton != NULL);

	if (m_pPosButton->IsVisible())
	{




		CPDF_Rect rcClient;
		CPDF_Rect rcPosArea,rcPosButton;	

		rcClient = this->GetClientRect();
		rcPosArea = GetScrollArea();

		FX_FLOAT fLeft,fRight,fTop,fBottom;

		switch (m_sbType)
		{
		case SBT_HSCROLL:
			fLeft = TrueToFace(m_sData.fScrollPos);
			fRight = TrueToFace(m_sData.fScrollPos + m_sData.fClientWidth);

			if (fRight - fLeft < PWL_SCROLLBAR_POSBUTTON_MINWIDTH)
				fRight = fLeft + PWL_SCROLLBAR_POSBUTTON_MINWIDTH;

			if (fRight > rcPosArea.right)
			{
				fRight = rcPosArea.right;
				fLeft = fRight - PWL_SCROLLBAR_POSBUTTON_MINWIDTH;
			}

			rcPosButton = CPDF_Rect(fLeft ,
								rcPosArea.bottom,
								fRight ,
								rcPosArea.top);
			
			break;
		case SBT_VSCROLL:
			fBottom = TrueToFace(m_sData.fScrollPos + m_sData.fClientWidth);
			fTop = TrueToFace(m_sData.fScrollPos);

			if (IsFloatSmaller(fTop - fBottom, PWL_SCROLLBAR_POSBUTTON_MINWIDTH))
				fBottom = fTop - PWL_SCROLLBAR_POSBUTTON_MINWIDTH;
			
			if (IsFloatSmaller(fBottom, rcPosArea.bottom))
			{
				fBottom = rcPosArea.bottom;
				fTop = fBottom + PWL_SCROLLBAR_POSBUTTON_MINWIDTH;
			}

			rcPosButton = CPDF_Rect(rcPosArea.left,
								fBottom,								
								rcPosArea.right,
								fTop);
			
			break;
		}

		m_pPosButton->Move(rcPosButton,TRUE,bRefresh);
	}
}

void CPWL_ScrollBar::OnMinButtonLBDown(const CPDF_Point & point)
{
	m_sData.SubSmall();
	MovePosButton(TRUE);
	NotifyScrollWindow();

	m_bMinOrMax = TRUE;

	EndTimer();
	BeginTimer(100);
}

void CPWL_ScrollBar::OnMinButtonLBUp(const CPDF_Point & point)
{
}

void CPWL_ScrollBar::OnMinButtonMouseMove(const CPDF_Point & point)
{	
}

void CPWL_ScrollBar::OnMaxButtonLBDown(const CPDF_Point & point)
{
	m_sData.AddSmall();
	MovePosButton(TRUE);
	NotifyScrollWindow();

	m_bMinOrMax = FALSE;
	
	EndTimer();
	BeginTimer(100);
}

void CPWL_ScrollBar::OnMaxButtonLBUp(const CPDF_Point & point)
{
}

void CPWL_ScrollBar::OnMaxButtonMouseMove(const CPDF_Point & point)
{	
}

void CPWL_ScrollBar::OnPosButtonLBDown(const CPDF_Point & point)
{
	m_bMouseDown = TRUE;

	if (m_pPosButton)
	{
		CPDF_Rect rcPosButton = m_pPosButton->GetWindowRect();

		switch(m_sbType)
		{
		case SBT_HSCROLL:
			m_nOldPos = point.x;
			m_fOldPosButton = rcPosButton.left;
			break;
		case SBT_VSCROLL:
			m_nOldPos = point.y;
			m_fOldPosButton = rcPosButton.top;
			break;
		}
	}
}

void CPWL_ScrollBar::OnPosButtonLBUp(const CPDF_Point & point)
{
	if (m_bMouseDown)
	{
		if (!m_bNotifyForever)
			NotifyScrollWindow();
	}
	m_bMouseDown = FALSE;
}

void CPWL_ScrollBar::OnPosButtonMouseMove(const CPDF_Point & point)
{
	FX_FLOAT fOldScrollPos = m_sData.fScrollPos;

	FX_FLOAT fNewPos = 0;

	switch (m_sbType)
	{
	case SBT_HSCROLL:
		if (FXSYS_fabs(point.x - m_nOldPos) < 1) return;
		fNewPos = FaceToTrue(m_fOldPosButton + point.x - m_nOldPos);
		break;
	case SBT_VSCROLL:
		if (FXSYS_fabs(point.y - m_nOldPos) < 1) return;
		fNewPos = FaceToTrue(m_fOldPosButton + point.y - m_nOldPos);
		break;
	}

	if (m_bMouseDown)
	{
		switch (m_sbType)
		{
		case SBT_HSCROLL:

			if (IsFloatSmaller(fNewPos, m_sData.ScrollRange.fMin))
			{
				fNewPos = m_sData.ScrollRange.fMin;
			}

			if (IsFloatBigger(fNewPos, m_sData.ScrollRange.fMax))
			{
				fNewPos = m_sData.ScrollRange.fMax;
			}

			m_sData.SetPos(fNewPos);
			
			break;
		case SBT_VSCROLL:
		
			if (IsFloatSmaller(fNewPos, m_sData.ScrollRange.fMin))
			{
				fNewPos = m_sData.ScrollRange.fMin;
			}

			if (IsFloatBigger(fNewPos, m_sData.ScrollRange.fMax))
			{
				fNewPos = m_sData.ScrollRange.fMax;
			}	

			m_sData.SetPos(fNewPos);
		
			break;
		}	
		
		if (!IsFloatEqual(fOldScrollPos, m_sData.fScrollPos))
		{			
			MovePosButton(TRUE);

			if (m_bNotifyForever)
				NotifyScrollWindow();
		}
	}
}

void CPWL_ScrollBar::NotifyScrollWindow()
{
	if (CPWL_Wnd * pParent = this->GetParentWindow())
	{
		FX_FLOAT fPos;
		switch (this->m_sbType)
		{
		case SBT_HSCROLL:
			fPos = m_OriginInfo.fContentMin + m_sData.fScrollPos;
			break;
		case SBT_VSCROLL:
			fPos = m_OriginInfo.fContentMax - m_sData.fScrollPos;
			break;
		}	
		pParent->OnNotify(this,PNM_SCROLLWINDOW,(FX_INTPTR)m_sbType,(FX_INTPTR)&fPos);
	}
}

CPDF_Rect CPWL_ScrollBar::GetScrollArea() const
{
	CPDF_Rect rcClient = GetClientRect();
	CPDF_Rect rcArea;

	if (!m_pMinButton || !m_pMaxButton)return rcClient;

	CPDF_Rect rcMin = m_pMinButton->GetWindowRect();
	CPDF_Rect rcMax = m_pMaxButton->GetWindowRect();

	FX_FLOAT fMinWidth = rcMin.right - rcMin.left;
	FX_FLOAT fMinHeight = rcMin.top - rcMin.bottom;
	FX_FLOAT fMaxWidth = rcMax.right - rcMax.left;
	FX_FLOAT fMaxHeight = rcMax.top - rcMax.bottom;

	switch(m_sbType)
	{
	case SBT_HSCROLL:
		if (rcClient.right - rcClient.left > fMinWidth + fMaxWidth + 2)
		{
			rcArea = CPDF_Rect(rcClient.left + fMinWidth + 1,rcClient.bottom,
						rcClient.right - fMaxWidth - 1,rcClient.top);
		}
		else
		{
			rcArea = CPDF_Rect(rcClient.left + fMinWidth + 1,rcClient.bottom,
						rcClient.left + fMinWidth + 1,rcClient.top);
		}
		break;
	case SBT_VSCROLL:
		if (rcClient.top - rcClient.bottom > fMinHeight + fMaxHeight + 2)
		{
			rcArea = CPDF_Rect(rcClient.left,rcClient.bottom + fMinHeight + 1,
						rcClient.right,rcClient.top - fMaxHeight - 1);
		}
		else
		{
			rcArea = CPDF_Rect(rcClient.left,rcClient.bottom + fMinHeight + 1,
						rcClient.right,rcClient.bottom + fMinHeight + 1);
		}
		break;
	}
	
	rcArea.Normalize();

	return rcArea;
}

FX_FLOAT CPWL_ScrollBar::TrueToFace(FX_FLOAT fTrue)
{
	CPDF_Rect rcPosArea;	
	rcPosArea = GetScrollArea();

	FX_FLOAT fFactWidth = m_sData.ScrollRange.GetWidth() + m_sData.fClientWidth;
	fFactWidth = fFactWidth == 0 ? 1 : fFactWidth;

	FX_FLOAT fFace = 0;

	switch(m_sbType)
	{
	case SBT_HSCROLL:
		fFace = rcPosArea.left + fTrue * (rcPosArea.right - rcPosArea.left) / fFactWidth;
		break;
	case SBT_VSCROLL:
		fFace = rcPosArea.top - fTrue * (rcPosArea.top - rcPosArea.bottom) / fFactWidth;
		break;
	}	

	return fFace;
}

FX_FLOAT CPWL_ScrollBar::FaceToTrue(FX_FLOAT fFace)
{
	CPDF_Rect rcPosArea;	
	rcPosArea = GetScrollArea();

	FX_FLOAT fFactWidth = m_sData.ScrollRange.GetWidth() + m_sData.fClientWidth;
	fFactWidth = fFactWidth == 0 ? 1 : fFactWidth;

	FX_FLOAT fTrue = 0;

	switch(m_sbType)
	{
	case SBT_HSCROLL:
		fTrue =  (fFace - rcPosArea.left) * fFactWidth / (rcPosArea.right - rcPosArea.left);
		break;
	case SBT_VSCROLL:
		fTrue = (rcPosArea.top - fFace) * fFactWidth / (rcPosArea.top - rcPosArea.bottom);
		break;
	}	

	return fTrue;
}

void CPWL_ScrollBar::CreateChildWnd(const PWL_CREATEPARAM & cp)
{
	CreateButtons(cp);
}

void CPWL_ScrollBar::TimerProc()
{
	PWL_SCROLL_PRIVATEDATA sTemp = m_sData;

	if (m_bMinOrMax)m_sData.SubSmall();	
	else m_sData.AddSmall();

	if (FXSYS_memcmp(&m_sData, &sTemp, sizeof(PWL_SCROLL_PRIVATEDATA)) != 0)
	{
		MovePosButton(TRUE);
		NotifyScrollWindow();
	}
}

/*
void CPWL_ScrollBar::OnSetFocus()
{
	if (GetTransparency() != 255)
	{
		SetTransparency(255);
		InvalidateRect();
	}
}

void CPWL_ScrollBar::OnKillFocus()
{
	if (GetTransparency() != PWL_SCROLLBAR_TRANSPARANCY)
	{
		SetTransparency(PWL_SCROLLBAR_TRANSPARANCY);
		InvalidateRect();
	}
}
*/