static void
DoFeedback(void)
{
GLint x;
glFeedbackBuffer(MAXFEED, GL_3D_COLOR, feedBuf);
(void) glRenderMode(GL_FEEDBACK);
glPushMatrix();
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluOrtho2D(-175, 175, -175, 175);
glMatrixMode(GL_MODELVIEW);
glClearColor(0.0, 0.0, 0.0, 0.0);
glClear(GL_COLOR_BUFFER_BIT);
glScalef(zoom, zoom, zoom);
glRotatef(zRotation, 0, 0, 1);
Render(GL_FEEDBACK);
glPopMatrix();
x = glRenderMode(GL_RENDER);
if (x == -1) {
x = MAXFEED;
}
DrawFeedback((GLint) x);
}
// Track mouse
bool CMouseTracker::Track(HWND hWnd, POINT& pt)
{
// Capture mouse
SetCapture(hWnd);
// Constrain to bounds
SnapMouse(pt);
ConstrainMouse(pt);
// Store attributes
m_hWnd=hWnd;
m_ptStart=pt;
if (m_bLockWindowUpdate)
{
// Update the window
RedrawWindow(hWnd, NULL, NULL, RDW_UPDATENOW|RDW_ALLCHILDREN);
LockWindowUpdate(m_hWnd);
}
// Call start handler
OnStarting(m_ptStart);
if (m_bAutoScroll)
{
m_dwLastScrollAt=GetTickCount();
SetTimer(m_hWnd, AUTOSCROLL_TIMER_ID, AUTOSCROLL_TIMER_PERIOD, NULL);
}
if (m_bHoverDetect)
{
m_dwHoverStart=GetTickCount();
SetTimer(m_hWnd, HOVER_TIMER_ID, HOVER_TIMER_PERIOD, NULL);
}
// Spin message loop
bool bCancelled=true;
bool bMoved=false;
while (true)
{
// Get a message
MSG msg;
if (!GetMessage(&msg, NULL, 0, 0))
break;
// Dispatch all non-input messages
if (!IsInputMessage(msg.message) &&
!(msg.message==WM_TIMER && (msg.wParam==AUTOSCROLL_TIMER_ID || msg.wParam==HOVER_TIMER_ID)))
{
DispatchMessage(&msg);
continue;
}
// Quit if lost capture
if (GetCapture()!=m_hWnd)
break;
// Handle message
switch (msg.message)
{
case WM_TIMER:
if (m_bHoverDetect && m_dwHoverStart && msg.wParam==HOVER_TIMER_ID)
{
if (GetTickCount() > m_dwHoverStart+HOVER_TIMEOUT)
{
POINT pt;
GetCursorPos(&pt);
ScreenToClient(m_hWnd, &pt);
m_dwHoverStart=0;
OnHover(pt);
}
break;
}
if (msg.wParam!=AUTOSCROLL_TIMER_ID)
break;
{
POINT pt;
GetCursorPos(&pt);
ScreenToClient(m_hWnd, &pt);
msg.lParam=MAKELPARAM(pt.x, pt.y);
// Fall throught to fake a WM_MOUSEMOVE
}
case WM_MOUSEMOVE:
{
// Get new point
POINT ptNew;
ptNew.x=(int)(short)LOWORD(msg.lParam);
ptNew.y=(int)(short)HIWORD(msg.lParam);
if (ptNew.x!=m_ptStart.x || ptNew.y!=m_ptStart.y)
bMoved=true;
// Get client rectangle
if (m_bAutoScroll)
{
// Outside client area?
RECT rcClient;
GetClientRect(m_hWnd, &rcClient);
if (!PtInRect(&rcClient, ptNew) && GetTickCount()>m_dwLastScrollAt + AUTOSCROLL_FREQUENCY)
{
// Kill old feedback
DrawFeedback();
// Release DC
if (m_bLockWindowUpdate)
{
LockWindowUpdate(NULL);
}
// Do scrolling
if (ptNew.x<rcClient.left)
SendMessage(m_hWnd, WM_HSCROLL, SB_LINEUP, 0);
if (ptNew.x>rcClient.right)
SendMessage(m_hWnd, WM_HSCROLL, SB_LINEDOWN, 0);
if (ptNew.y<rcClient.top)
SendMessage(m_hWnd, WM_VSCROLL, SB_LINEUP, 0);
if (ptNew.y>rcClient.bottom)
SendMessage(m_hWnd, WM_VSCROLL, SB_LINEDOWN, 0);
UpdateWindow(m_hWnd);
// Get a newly clipped DC
if (m_bLockWindowUpdate)
{
RedrawWindow(hWnd, NULL, NULL, RDW_UPDATENOW|RDW_ALLCHILDREN);
LockWindowUpdate(m_hWnd);
}
// Redraw feedback
DrawFeedback();
m_dwLastScrollAt=GetTickCount();
}
}
// Adjust for scrolling
POINT ptScrollOffset=GetScrollOffset();
ptNew.x+=ptScrollOffset.x;
ptNew.y+=ptScrollOffset.y;
// Constrain to bounds
SnapMouse(ptNew);
ConstrainMouse(ptNew);
// Only handle if still moved after constraining
if (ptNew.x!=pt.x || ptNew.y!=pt.y || msg.message==WM_TIMER)
{
if (msg.message!=WM_TIMER)
{
m_dwHoverStart=GetTickCount();
}
// Call handler
OnMove(pt, ptNew);
// Store new point
pt=ptNew;
}
}
break;
case WM_LBUTTONUP:
case WM_RBUTTONUP:
bCancelled=false;
ReleaseCapture();
break;
case WM_RBUTTONDOWN:
ReleaseCapture();
break;
case WM_KEYDOWN:
if (msg.wParam==VK_ESCAPE)
{
ReleaseCapture();
break;
}
// Fall through
case WM_KEYUP:
case WM_SYSKEYDOWN:
case WM_SYSKEYUP:
// Call handler
OnMove(pt, pt);
break;
}
// Quit if lost capture
if (GetCapture()!=m_hWnd)
break;
}
if (m_bAutoScroll)
{
KillTimer(m_hWnd, AUTOSCROLL_TIMER_ID);
}
if (m_bHoverDetect)
{
KillTimer(m_hWnd, HOVER_TIMER_ID);
}
// Finished
OnFinished(pt, bCancelled);
// Clean up
if (m_bLockWindowUpdate)
{
LockWindowUpdate(NULL);
}
return bMoved && !bCancelled;
}
