#include <string.h>
#include <mdiwin/capture.hpp>

Capture::Capture(void)
: mhWnd(0), mIsInCapture(FALSE), mHasCapture(FALSE)
{
	reset();
}

Capture::~Capture()
{
}

void Capture::leftButtonDown(LPARAM lParam)
{
	HDC hDC;
	if(!mhWnd)return;

	mIsInCapture=TRUE;
	mHasCapture=FALSE;
	hDC=::GetDC(mhWnd);
	::DrawFocusRect(hDC,(RECT FAR *)&mZoomRect);
	::ReleaseDC(mhWnd,hDC);
	::memset((char*)&mZoomRect,0,sizeof(RECT));
	::SetCapture(mhWnd);
	::GetClientRect(mhWnd,(RECT FAR *)&mZoomRect);
	::ClientToScreen(mhWnd,(POINT FAR *)&mZoomRect);
	::ClientToScreen(mhWnd,(POINT FAR *)&mZoomRect+1);
	::ClipCursor((RECT FAR *)&mZoomRect);
	mZoomRect.top=mZoomRect.bottom=HIWORD(lParam);
	mZoomRect.left=mZoomRect.right=LOWORD(lParam);
}

void Capture::mouseMove(LPARAM lParam)
{
	HDC hDC;

	if(!mIsInCapture)return;
	hDC=::GetDC(mhWnd);
	::DrawFocusRect(hDC,(RECT FAR *)&mZoomRect);
	mZoomRect.bottom=HIWORD(lParam);
	mZoomRect.right=LOWORD(lParam);
	::DrawFocusRect(hDC,(RECT FAR *)&mZoomRect);
	::ReleaseDC(mhWnd,hDC);
}

void Capture::leftButtonUp(void)
{
  HDC hDC;
	int width;
	int height;
	int temp;

	if(!mIsInCapture)return;
	mIsInCapture=FALSE;
	::ClipCursor(NULL);
	::ReleaseCapture();
  hDC=::GetDC(mhWnd);
	::DrawFocusRect(hDC,(RECT FAR *)&mZoomRect);
	if(mZoomRect.left>mZoomRect.right)
	{
		temp=mZoomRect.left;
		mZoomRect.left=mZoomRect.right;
		mZoomRect.right=temp;
	}
	if(mZoomRect.top>mZoomRect.bottom)
	{
		temp=mZoomRect.top;
		mZoomRect.top=mZoomRect.bottom;
		mZoomRect.bottom=temp;
	}
	width=mZoomRect.right-mZoomRect.left;
	height=mZoomRect.bottom-mZoomRect.top;
	::DrawFocusRect(hDC,(RECT FAR *)&mZoomRect);
	::ReleaseDC(mhWnd,hDC);
	if(width>7 && height>7)
	{
		mClipRect.right=mZoomRect.right;
		mClipRect.left=mZoomRect.left;
		mClipRect.top=mZoomRect.top;
		mClipRect.bottom=mZoomRect.bottom;
		mHasCapture=TRUE;
	}
}

WORD Capture::boundedRect(RECT &boundingRect)
{
	HDC hDC;

	if(!mHasCapture)return FALSE;
	boundingRect.right=mClipRect.right;
	boundingRect.left=mClipRect.left;
	boundingRect.top=mClipRect.top;
	boundingRect.bottom=mClipRect.bottom;
  hDC=::GetDC(mhWnd);
	::DrawFocusRect(hDC,(RECT FAR *)&mZoomRect);
	::ReleaseDC(mhWnd,hDC);
	::memset((char*)&mZoomRect,0,sizeof(RECT));
	return TRUE;
}

void Capture::reset(void)
{
	HDC hDC(::GetDC(mhWnd));

	if(mHasCapture)
  {
		::DrawFocusRect(hDC,(RECT FAR *)&mZoomRect);
		mHasCapture=FALSE;
  }
	::memset((char *)&mZoomRect,0,sizeof(RECT));
	::ReleaseDC(mhWnd,hDC);
}