396 lines
8.5 KiB
C++
396 lines
8.5 KiB
C++
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#include "precomp.h"
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#include "splitbar2.h"
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#include "resource.h"
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/* static */ int CSplitBar2::ms_dxpSplitBar = 0; // width of a standard split bar window // GetSystemMetrics(SM_CXSIZEFRAME);
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/* static */ void CSplitBar2::_UpdateSplitBar(void)
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{
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ms_dxpSplitBar = GetSystemMetrics(SM_CXSIZEFRAME);
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}
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/* C S P L I T B A R */
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/*-------------------------------------------------------------------------
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%%Function: CSplitBar2
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-------------------------------------------------------------------------*/
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CSplitBar2::CSplitBar2(void)
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: m_hwndBuddy (NULL)
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, m_hwndParent(NULL)
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, m_pfnAdjust(NULL)
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, m_Context(NULL)
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, m_hdcDrag(NULL)
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, m_fCaptured(FALSE)
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{
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DBGENTRY(CSplitBar2::CSplitBar2);
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_UpdateSplitBar();
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DBGEXIT(CSplitBar2::CSplitBar2);
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}
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CSplitBar2::~CSplitBar2()
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{
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DBGENTRY(CSplitBar2::~CSplitBar2);
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if( ::IsWindow( m_hWnd ) )
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{
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DestroyWindow();
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}
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DBGEXIT(CSplitBar2::~CSplitBar2);
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}
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HRESULT CSplitBar2::Create(HWND hwndBuddy, PFN_ADJUST pfnAdjust, LPARAM Context)
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{
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DBGENTRY(CSplitBar2::Create);
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HRESULT hr = S_OK;
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if( hwndBuddy && pfnAdjust )
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{
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m_hwndBuddy = hwndBuddy;
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m_hwndParent = ::GetParent(hwndBuddy);
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m_pfnAdjust = pfnAdjust;
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m_Context = Context;
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RECT rc;
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SetRect( &rc, 0, 0, ms_dxpSplitBar, 0 );
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if( !CWindowImpl<CSplitBar2>::Create( m_hwndParent, rc ) )
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{
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hr = HRESULT_FROM_WIN32(GetLastError());
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}
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}
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else
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{
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hr = E_INVALIDARG;
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}
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DBGEXIT_HR(CSplitBar2::Create,hr);
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return hr;
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}
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LRESULT CSplitBar2::OnLButtonDown(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
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{
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DBGENTRY(CSplitBar2::OnLButtonDown);
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POINT pt;
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pt.x = LOWORD(lParam);
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pt.y = HIWORD(lParam);
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_TrackDrag(pt);
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DBGEXIT(CSplitBar2::OnLButtonDown);
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return 0;
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}
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/* C O N S T R A I N D R A G P O I N T */
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/*-------------------------------------------------------------------------
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%%Function: _ConstrainDragPoint
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-------------------------------------------------------------------------*/
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int CSplitBar2::_ConstrainDragPoint(short x)
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{
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DBGENTRY(CSplitBar2::_ConstrainDragPoint);
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// Factor out the drag offset (to make calculations easier)
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int dx = x - m_dxDragOffset;
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// Don't allow the panes to go below their minimum size
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if (dx < m_dxMin)
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{
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dx = m_dxMin;
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}
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else if (dx > m_dxMax)
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{
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dx = m_dxMax;
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}
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DBGEXIT(CSplitBar2::_ConstrainDragPoint);
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// Factor the drag offset back in
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return (m_dxDragOffset + dx);
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}
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/* D R A W B A R */
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/*-------------------------------------------------------------------------
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%%Function: _DrawBar
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-------------------------------------------------------------------------*/
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void CSplitBar2::_DrawBar(void)
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{
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DBGENTRY(CSplitBar2::_DrawBar);
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RECT rc;
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RECT ClientRect;
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GetClientRect( &ClientRect );
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// Rectangle is a larger to make it easier to see.
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rc.top = ClientRect.top;
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rc.bottom = ClientRect.bottom;
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rc.left = m_xCurr - (m_dxDragOffset + 1); //ClientRect.left +
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rc.right = rc.left + ms_dxpSplitBar + 1;
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::MapWindowPoints(m_hwndParent, GetDesktopWindow(), (POINT *) &rc, 2);
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::InvertRect(m_hdcDrag, &rc);
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DBGEXIT(CSplitBar2::_DrawBar);
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}
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/* F I N I T D R A G L O O P */
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/*-------------------------------------------------------------------------
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%%Function: FInitDragLoop
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Initialize the mouse down drag loop.
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Return FALSE if there was a problem.
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-------------------------------------------------------------------------*/
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BOOL CSplitBar2::FInitDragLoop(POINT pt)
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{
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DBGENTRY(CSplitBar2::FInitDragLoop);
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if (NULL != ::GetCapture())
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{
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ERROR_OUT(("InitDragLoop: Unable to capture"));
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return FALSE;
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}
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// handle pending WM_PAINT messages
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MSG msg;
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while (::PeekMessage(&msg, NULL, WM_PAINT, WM_PAINT, PM_NOREMOVE))
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{
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if (!GetMessage(&msg, NULL, WM_PAINT, WM_PAINT))
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return FALSE;
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DispatchMessage(&msg);
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}
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HWND hwndDesktop = GetDesktopWindow();
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DWORD dwFlags = ::LockWindowUpdate(hwndDesktop) ? DCX_WINDOW|DCX_CACHE|DCX_LOCKWINDOWUPDATE : DCX_WINDOW|DCX_CACHE;
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ASSERT(m_hdcDrag == NULL);
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m_hdcDrag = ::GetDCEx(hwndDesktop, NULL, dwFlags);
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ASSERT(m_hdcDrag != NULL);
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ASSERT(!m_fCaptured);
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SetCapture();
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ASSERT(m_hWnd == GetCapture());
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m_fCaptured = TRUE;
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m_dxDragOffset = pt.x;
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m_xCurr = pt.x;
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_DrawBar();
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RECT rc;
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// determine the drag extent
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::GetClientRect(m_hwndBuddy, &rc);
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::MapWindowPoints(m_hwndBuddy, m_hwndParent, (POINT *) &rc, 1);
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m_dxMin = rc.left + (32 + (3*2));
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::GetClientRect( ::GetParent( m_hwndParent ) , &rc);
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m_dxMax = RectWidth(rc) - (ms_dxpSplitBar + 176);
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if (m_dxMax < m_dxMin)
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m_dxMax = m_dxMin;
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TRACE_OUT(("captured mouse at (%d,%d) (min=%d, max=%d)", pt.x, pt.y, m_dxMin, m_dxMax));
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DBGEXIT(CSplitBar2::FInitDragLoop);
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return TRUE;
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}
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/* O N D R A G M O V E */
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/*-------------------------------------------------------------------------
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%%Function: OnDragMove
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-------------------------------------------------------------------------*/
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void CSplitBar2::OnDragMove(POINT pt)
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{
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DBGENTRY(CSplitBar2::OnDragMove);
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ASSERT(m_fCaptured);
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::ScreenToClient(m_hwndParent, &pt);
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int x = _ConstrainDragPoint((short)pt.x);
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if (x != m_xCurr)
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{
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_DrawBar();
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m_xCurr = x;
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_DrawBar();
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}
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DBGEXIT(CSplitBar2::OnDragMove);
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}
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/* O N D R A G E N D */
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/*-------------------------------------------------------------------------
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%%Function: OnDragEnd
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-------------------------------------------------------------------------*/
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void CSplitBar2::OnDragEnd(POINT pt)
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{
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DBGENTRY(CSplitBar2::OnDragEnd);
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CancelDragLoop();
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RECT ClientRect;
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GetClientRect( &ClientRect );
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::ScreenToClient(m_hwndParent, &pt);
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int x = _ConstrainDragPoint((short)pt.x);
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if (0 != x)
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{
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// Call the adjustment function
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if(m_pfnAdjust)
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{
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m_pfnAdjust(x - (ClientRect.left + m_dxDragOffset), m_Context);
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}
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// ForceWindowResize();
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}
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DBGEXIT(CSplitBar2::OnDragEnd);
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}
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/* C A N C E L D R A G L O O P */
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/*-------------------------------------------------------------------------
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%%Function: CancelDragLoop
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-------------------------------------------------------------------------*/
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void CSplitBar2::CancelDragLoop(void)
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{
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DBGENTRY(CSplitBar2::CancelDragLoop);
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if (m_fCaptured)
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{
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TRACE_OUT(("Canceling drag loop..."));
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// Release the capture
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ReleaseCapture();
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m_fCaptured = FALSE;
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// Erase the bar
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_DrawBar();
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// unlock window updates
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LockWindowUpdate(NULL);
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if (m_hdcDrag != NULL)
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{
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::ReleaseDC(GetDesktopWindow(), m_hdcDrag);
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m_hdcDrag = NULL;
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}
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}
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DBGEXIT(CSplitBar2::CancelDragLoop);
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}
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void CSplitBar2::_TrackDrag(POINT pt)
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{
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DBGENTRY(CSplitBar2::_TrackDrag);
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// set capture to the window which received this message
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if (FInitDragLoop(pt))
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{
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// get messages until capture lost or cancelled/accepted
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while (GetCapture() == m_hWnd)
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{
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MSG msg;
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if (!::GetMessage(&msg, NULL, 0, 0))
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{
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PostQuitMessage(msg.wParam);
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break;
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}
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if (WM_MOUSEMOVE == msg.message)
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{
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OnDragMove(msg.pt);
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continue;
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}
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if (WM_LBUTTONUP == msg.message)
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{
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OnDragEnd(msg.pt);
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break;
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}
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if ((WM_KEYDOWN == msg.message) ||
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(WM_RBUTTONDOWN == msg.message))
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{
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break;
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}
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// dispatch all other messages
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DispatchMessage(&msg);
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}
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CancelDragLoop();
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}
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else
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{
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WARNING_OUT(("Unable to Initialize drag loop?"));
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}
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DBGEXIT(CSplitBar2::_TrackDrag);
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}
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/* static */ CWndClassInfo& CSplitBar2::GetWndClassInfo()
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{
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DBGENTRY(CSplitBar2::GetWndClassInfo);
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static CWndClassInfo wc =
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{
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{
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sizeof(WNDCLASSEX), // cbSize
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NULL, // style
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StartWindowProc, // WndProc
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0, // cbClsExtra
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0, // cbWndExtra
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0, // hInstance
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0, // hIcon
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NULL, // hCursor
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reinterpret_cast<HBRUSH>(COLOR_3DFACE + 1), // hBackground
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0, // lpszMenuName
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_T("ConfSplitBarClass2"), // lpszClassName
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0 // hIconSm
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},
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NULL,
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NULL,
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MAKEINTRESOURCE(IDC_SPLITV), // hCursor,
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FALSE,
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0,
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_T("")
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};
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DBGEXIT(CSplitBar2::GetWndClassInfo);
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return wc;
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}
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