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/*
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	文件：ResizeDlg.cpp		类CResizeDlg的执行文件

	版权：Firebird Software Workroom 保留

	声明：本源程序的版权受《中华人民共和国著作权法》以及其
		  它相关法律和条约的保护。任何有机会得到本源程序的
		  个人和机构，未经作者明确授权，不得将本源程序用于
		  任何商业目的(直接的或间接的)。对于非商业目的的使
		  用 (包括复制、传播、编译和修改)， 原则上没有特别
		  的限制条款，但请在相关文档中说明其来源，并尊重原
		  作者的署名权。

	编写：秦传安(chings)	2000.5

	联络：Tel：(0792)6323086	E_mail：chings@163.net
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#include "fclstd.h"
#include "ScreenCap.h"
#include "resource.h"
#include "MainWnd.h"
#include "ResizeDlg.h"

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CResizeDlg::CResizeDlg()
{
	m_pImg = NULL;
	m_hBmpTemp = NULL;
}

CResizeDlg::~CResizeDlg()
{

}
//####################################################################
LRESULT CResizeDlg::WindowProc(UINT msg,WPARAM wParam,LPARAM lParam)
{
	if(msg == WM_HSCROLL)
	{
		HWND hwnd = GetDlgItem(m_hWnd,IDC_SLIDER1);
		if(hwnd == (HWND)lParam && m_pImg)
		{
			if((LOWORD(wParam) == TB_ENDTRACK) ||
				(LOWORD(wParam) == TB_THUMBPOSITION))
				OnHScroll(HIWORD(wParam));
		}
		return 0;
	}
	else if(msg == WM_DESTROY && m_pImg)
	{
		LPIMAGE_INFO pii = m_pImg->GetImageInfo();
		memcpy(pii,&img,sizeof(IMAGE_INFO));
	}

	return CModalDlg::WindowProc(msg,wParam,lParam);
}
//####################################################################
void CResizeDlg::OnInitDialog()
{
	if(!m_pImg)
	{
		CMainWnd* pFrame = (CMainWnd*)GetApp()->m_pMainWnd;
		if(pFrame)
			m_pImg = pFrame->GetCurrentImage();

		if(!m_pImg)
			EndDialog(m_hWnd,IDCANCEL);
	}

	LPIMAGE_INFO pii = m_pImg->GetImageInfo();
	memcpy(&img,pii,sizeof(IMAGE_INFO));
	memset(pii,0,sizeof(IMAGE_INFO));

	cx = img.cx;
	cy = img.cy;
	scale = 100;

	HWND hwnd = GetDlgItem(m_hWnd,IDC_SLIDER1);
	if(hwnd)
		SendMessage(hwnd,TBM_SETRANGE,(WPARAM)TRUE,MAKELPARAM(0,200));

	RECT rc,rcOwner;
	GetWindowRect(m_hWnd,&rc);
	GetWindowRect(m_pOwner->m_hWnd,&rcOwner);
	int x = rcOwner.right - (rc.right - rc.left);
	int y = rcOwner.bottom - (rc.bottom - rc.top);

	SetWindowPos(m_hWnd,NULL,x,y,0,0,SWP_NOZORDER|SWP_NOSIZE);

	UpdateControl();
}
//####################################################################
void CResizeDlg::UpdateControl()
{
	if(!m_hWnd)return;

	char str[16];
	HWND hwnd = GetDlgItem(m_hWnd,IDC_EDIT_SCALE);
	if(hwnd)
	{
		ltoa(scale,str,10);
		SendMessage(hwnd,WM_SETTEXT,0,(LPARAM)str);
	}

	hwnd = GetDlgItem(m_hWnd,IDC_EDIT_WIDTH);
	if(hwnd)
	{
		ltoa(cx,str,10);
		SendMessage(hwnd,WM_SETTEXT,0,(LPARAM)str);
	}

	hwnd = GetDlgItem(m_hWnd,IDC_EDIT_HEIGHT);
	if(hwnd)
	{
		ltoa(cy,str,10);
		SendMessage(hwnd,WM_SETTEXT,0,(LPARAM)str);
	}

	hwnd = GetDlgItem(m_hWnd,IDC_SLIDER1);
	if(hwnd)
		SendMessage(hwnd,TBM_SETPOS,(WPARAM)TRUE,(LPARAM)scale);
}
//####################################################################
void CResizeDlg::OnHScroll(int nNewPos)
{
	HDC hdc = NULL, hBmpDC = NULL,hImgDC = NULL;
	HBITMAP hbmp = NULL;
	int pos;

	HWND hwnd = GetDlgItem(m_hWnd,IDC_SLIDER1);
	if(hwnd)
		pos = SendMessage(hwnd,TBM_GETPOS,0,0);

	if(pos == scale)
		return;

	scale = pos;
	cx = (int)(img.cx*scale)/100;
	cy = (int)(img.cy*scale)/100;
	UpdateControl();

	hImgDC = GetDC(m_pImg->m_hWnd);
	hdc = CreateCompatibleDC(hImgDC);
	if(!hdc)return;

	SelectObject(hdc,img.hBmp);

	hBmpDC = CreateCompatibleDC(hImgDC);
	if(!hBmpDC)
		goto Done;

	hbmp = CreateCompatibleBitmap(hdc,cx,cy);
	if(!hbmp)
		goto Done;

	SelectObject(hBmpDC,hbmp);
	StretchBlt(hBmpDC,0,0,cx,cy,hdc,0,0,img.cx,img.cy,SRCCOPY);

	if(m_hBmpTemp)
		DeleteObject(m_hBmpTemp);

	m_hBmpTemp = hbmp;
	m_pImg->LoadFromHandle(hbmp);
	m_pImg->Invalidate();

Done:
	if(hdc)
		DeleteDC(hdc);
	if(hBmpDC)
		DeleteDC(hBmpDC);
	if(hImgDC)
		ReleaseDC(m_hWnd,hImgDC);
}