//-----------------------------------------------------------------------------
// Purpose: Handles left mouse button down events in the 2D view.
// Input : Per CWnd::OnLButtonDown.
// Output : Returns true if the message was handled, false if not.
//-----------------------------------------------------------------------------
bool Clipper3D::OnLMouseDown2D(CMapView2D *pView, UINT nFlags, CPoint point)
{
CMapDoc *pDoc = pView->GetDocument();
CMapWorld *pWorld = pDoc->GetMapWorld();
m_ptLDownClient = point;
m_bLButtonDown = true;
pView->SetCapture();
//
// Convert to some odd coordinate space that the base tools code uses.
//
CPoint ptScreen = point;
ptScreen.x += pView->GetScrollPos(SB_HORZ);
ptScreen.y += pView->GetScrollPos(SB_VERT);
//
// Convert point to world coords.
//
pView->ClientToWorld(point);
Vector ptOrg( COORD_NOTINIT, COORD_NOTINIT, COORD_NOTINIT );
ptOrg[axHorz] = point.x;
ptOrg[axVert] = point.y;
// getvisiblepoint fills in any coord that's still set to COORD_NOTINIT:
pDoc->GetBestVisiblePoint(ptOrg);
// snap starting position to grid
if (!(GetAsyncKeyState(VK_MENU) & 0x8000))
{
pDoc->Snap(ptOrg);
}
BOOL bStarting = FALSE;
// if the tool is not empty, and shift is not held down (to
// start a new camera), don't do anything.
if(!IsEmpty())
{
if(!StartTranslation(ptScreen))
{
if (nFlags & MK_SHIFT)
{
SetEmpty();
bStarting = TRUE;
}
else
{
goto _DoNothing;
}
}
}
else
{
bStarting = TRUE;
}
SetClipObjects(pDoc->Selection_GetList());
if (bStarting)
{
StartNew(ptOrg);
pView->SetUpdateFlag(CMapView2D::updTool);
}
_DoNothing:
return true;
}
