Method OnMouseMove

Src/LocationView.cpp:584–619

* @brief Process drag action on a captured mouse. * * Reposition on every dragged movement. * The Screen update stress will be similar to a mouse wheeling.:-) */

 * The Screen update stress will be similar to a mouse wheeling.:-)
 */
void CLocationView::OnMouseMove(UINT nFlags, CPoint point) 
{
	if (GetCapture() == this)
	{
		CMergeDoc *pDoc = GetDocument();
		int nGroup = pDoc->GetActiveMergeView()->m_nThisGroup;

		// Don't go above bars.
		point.y = max(point.y, Y_OFFSET);

		// Vertical scroll handlers are range safe, so there is no need to
		// make sure value is valid and in range.
		int nSubLine = (int) (m_pixInLines * (point.y - Y_OFFSET));
		nSubLine -= pDoc->GetView(nGroup, 0)->GetScreenLines() / 2;
		if (nSubLine < 0)
			nSubLine = 0;

		// Just a random choose as both view share the same scroll bar.
		CWnd *pView = pDoc->GetView(nGroup, 0);

		SCROLLINFO si = { sizeof SCROLLINFO };
		si.fMask = SIF_POS;
		si.nPos = nSubLine;
		pView->SetScrollInfo(SB_VERT, &si);

		// The views are child windows of a splitter windows. Splitter window
		// doesn't accept scroll bar updates not send from scroll bar control.
		// So we need to update both views.
		int pane;
		int nBuffers = pDoc->m_nBuffers;
		for (pane = 0; pane < nBuffers; pane++)
			pDoc->GetView(nGroup, pane)->SendMessage(WM_VSCROLL, MAKEWPARAM(SB_THUMBPOSITION, 0), NULL);
	}

	CView::OnMouseMove(nFlags, point);
}

int  CLocationView::OnMouseActivate(CWnd* pDesktopWnd, UINT nHitTest, UINT message)
{