/********************************************************************************
* Begin store the mouse movements into our stroke objects *
********************************************************************************/
void CWhiteBoardView::OnLButtonDown(UINT nFlags, CPoint point)
{
CWhiteBoardDoc* pDoc = GetDocument(); // the Document
// Note: Do NOT use GetDC when sending coordinates from one
// scroll view to another, the stroke will not display correctly
CClientDC theDC(this); // the Device Context
OnPrepareDC(&theDC); // prepare the Device Context
bIsDrawing = true; // We are now drawing
SetCapture(); // Keep the mouse focus
// Covert the point to logical units (prevent mangling due to scrolling)
theDC.DPtoLP(&point);
// Create a new stroke starting at the current mouse location
if (pDoc->m_pCurStroke == NULL)
{
pDoc->m_pCurStroke = new CStroke(point);
pDoc->m_pCurStroke->mStrokeColor = pDoc->m_CurStrokeColor;
pDoc->m_pCurStroke->mStrokeSize = pDoc->m_nCurStrokeSize;
pDoc->m_StrokeList.AddTail( pDoc->m_pCurStroke );
}
// Move the graphics pt to the stroke's first point (mouse position)
theDC.MoveTo(point);
mCurPoint = point;
// Call the base case implementation
CScrollView::OnLButtonDown(nFlags, point);
}
ZDC ZSubPane::GetDC()
{
ZDC theDC(this->GetWindow()->GetWindowCanvas(), ZPoint::sZero);
theDC.SetOrigin(this->ToWindow(ZPoint::sZero));
theDC.SetPatternOrigin(this->GetCumulativeTranslation());
theDC.SetClip(this->CalcVisibleBoundsRgn());
return theDC;
}
/********************************************************************************
* Renders a single stroke. Used after receiving a stroke to void a full redraw *
********************************************************************************/
void CWhiteBoardView::DrawSingleStroke(CStroke *pStroke)
{
// Create a device context for the client window
// (Do NOT use GetDC() when sending from one ScrollView to another)
CClientDC theDC(this);
OnPrepareDC(&theDC);
// Tell the stroke to draw itself
pStroke->DrawStroke(&theDC);
}
ZDC ZSubPane::GetDC(ZDCRgn& outBoundsRgn)
{
ZDC theDC(this->GetWindow()->GetWindowCanvas(), ZPoint::sZero);
theDC.SetOrigin(this->ToWindow(ZPoint::sZero));
theDC.SetPatternOrigin(this->GetCumulativeTranslation());
outBoundsRgn = this->CalcBoundsRgn();
if (this->GetVisible())
{
if (fSuperPane)
theDC.SetClip(outBoundsRgn & this->FromSuper(fSuperPane->CalcVisibleBoundsRgn()));
else
theDC.SetClip(outBoundsRgn);
}
return theDC;
}
/********************************************************************************
* Whenever the mouse moves. We need to track the path of each stroke *
********************************************************************************/
void CWhiteBoardView::OnMouseMove(UINT nFlags, CPoint point)
{
// TODO: Add your message handler code here and/or call default
CStroke* pCurStroke = GetDocument()->m_pCurStroke;
// Are we drawing?
if (bIsDrawing)
{
// Prepare a DC
CClientDC theDC(this);
OnPrepareDC(&theDC);
// Convert the point to Logical coords due to possible mangling (from scrolling)
theDC.DPtoLP(&point);
// Move the graphics position to the previous point
theDC.MoveTo(mCurPoint);
// Create the stroke's pen for drawing
CPen thePen(PS_SOLID,pCurStroke->mStrokeSize,pCurStroke->mStrokeColor);
CPen* pOldPen = theDC.SelectObject(&thePen);
// Draw a line to the current mouse position
theDC.LineTo(point);
// Restore the old pen
theDC.SelectObject(pOldPen);
// Set the new current point
mCurPoint = point;
// If the current stroke isn't NULL (which it shouldn't be when drawing)
// add the new point to the end of it's path
if (pCurStroke != NULL)
pCurStroke->m_PointList.AddTail( new CPoint(point) );
}
// Call the base class implementation
CScrollView::OnMouseMove(nFlags, point);
}
