Src/Win32/Widgets/WindowSelect.cpp

   1
   2 #include "WinCommon.h"
   3 #include "WindowSelect.h"
   4 #include "../resource.h"
   5 #include <utility>              // for std::pair
   6
   7 using namespace Dasher;
   8
   9 CWinSel::CWinSel(HWND Parent, CEdit *m_pEdit)
  10 :m_hwnd(0), m_pEdit(m_pEdit)
  11 {
  12   g_hRectanglePen = CreatePen(PS_SOLID, 3, RGB(256, 0, 0));
  13   g_bStartSearchWindow = FALSE;
  14   g_hBitmapFinderToolFilled = LoadBitmap(WinHelper::hInstApp, MAKEINTRESOURCE(IDB_FINDER_FULL));
  15   
  g_hBitmapFinderToolEmpty = LoadBitmap(WinHelper::hInstApp, MAKEINTRESOURCE(IDB_FINDER_EMPTY));
  16   g_hCursorSearchWindow = LoadCursor(WinHelper::hInstApp, MAKEINTRESOURCE(IDC_SEARCH_CURSOR));
  17   DialogBoxParam(WinHelper::hInstApp, (LPCTSTR) IDD_WINSELECT, Parent, (DLGPROC) WinWrapMap::WndProc, (LPARAM) this);
  18 }
  19
  20 long CWinSel::RefreshWindow(HWND hwndWindowToBeRefreshed) 
{
  long lRet = 0;
  InvalidateRect(hwndWindowToBeRefreshed, NULL, TRUE);
  UpdateWindow(hwndWindowToBeRefreshed);
  RedrawWindow(hwndWindowToBeRefreshed, NULL, NULL, RDW_FRAME | RDW_INVALIDATE 
                | RDW_UPDATENOW | RDW_ALLCHILDREN);
  21     
  return lRet;
}
  22 
long CWinSel::SearchWindow(HWND hwndDialog) {
  23   long lRet = 0;
  g_bStartSearchWindow = TRUE;
  24   // Set the screen cursor to the BullsEye cursor.
  25   if(g_hCursorSearchWindow) {  
    g_hCursorPrevious = SetCursor(g_hCursorSearchWindow);
  }
  26   else {
    g_hCursorPrevious = NULL; 
  }
  SetCapture(hwndDialog);
  SetFinderToolImage(hwndDialog, FALSE);
  return lRet;
}
  27
  28 long CWinSel::DoMouseMove(HWND hwndDialog, UINT message, WPARAM wParam, LPARAM lParam) {
  POINT screenpoint;
  HWND hwndFoundWindow = NULL;
  long lRet = 0;
  29   // Must use GetCursorPos() instead of calculating 
  // from "lParam".
  GetCursorPos(&screenpoint);
  30   // Determine the window that lies underneath 
  // the mouse cursor.
  hwndFoundWindow = WindowFromPoint(screenpoint);
  31   // We have just found a new window.
  // If there was a previously found window, we must 
  // instruct it to refresh itself. 
  // This is done to remove any highlighting 
  // effects drawn by us.
  32   if(g_hwndFoundWindow) {
    RefreshWindow(g_hwndFoundWindow);  
  }
  33
  34   // Indicate that this found window is now
  35   // the current global found window.
  36   g_hwndFoundWindow = hwndFoundWindow;
  37
  38   // We now highlight the found window.
  39   HighlightFoundWindow(hwndDialog, g_hwndFoundWindow);
  return lRet;
}
  40
  41 long CWinSel::HighlightFoundWindow(HWND hwndDialog, HWND hwndFoundWindow) {
  42   // The DC of the found window.
  43   HDC hWindowDC = NULL;
  44
  45   // Handle of the existing pen in the DC of the found window.
  46   HGDIOBJ hPrevPen = NULL;
  47   // Handle of the existing brush in the DC of the found window.
  48   HGDIOBJ hPrevBrush = NULL;
  RECT rect;                  // Rectangle area of the found window.
  49   long lRet = 0;
  50   // Get the screen coordinates of the rectangle
  51   // of the found window.
  52   GetWindowRect(hwndFoundWindow, &rect);
  53   // Get the window DC of the found window.
  54   hWindowDC = GetWindowDC(hwndFoundWindow);
  if(hWindowDC) {
  55     // Select our created pen into the DC and 
    // backup the previous pen.
    hPrevPen = SelectObject(hWindowDC, g_hRectanglePen);
  56     // Select a transparent brush into the DC and 
    // backup the previous brush.
    hPrevBrush = SelectObject(hWindowDC, 
    GetStockObject(HOLLOW_BRUSH));
  57     // Draw a rectangle in the DC covering 
    // the entire window area of the found window.
    Rectangle(hWindowDC, 0, 0, 
    rect.right - rect.left, rect.bottom - rect.top);
  58     // Reinsert the previous pen and brush 
    // into the found window's DC.
    SelectObject(hWindowDC, hPrevPen);
    SelectObject(hWindowDC, hPrevBrush);
  59     // Finally release the DC.
    ReleaseDC(hwndFoundWindow, hWindowDC);
  } 
  return lRet;
}
  60
  61 long CWinSel::DoMouseUp(HWND hwndDialog, UINT message, WPARAM wParam, LPARAM lParam) {
  long lRet = 0;
  62   // If we had a previous cursor, set the 
  // screen cursor to the previous one.
  // The cursor is to stay exactly where it 
  // is currently located when the 
  // left mouse button is lifted.
  if(g_hCursorPrevious) { 
    SetCursor(g_hCursorPrevious); 
  }
  63   // If there was a found window, refresh 
  // it so that its highlighting is erased. 
  if(g_hwndFoundWindow) {
    RefreshWindow(g_hwndFoundWindow);
  64   }
  65   // Very important : must release the mouse capture.
  ReleaseCapture();
  // Set the global search window flag to FALSE.
  g_bStartSearchWindow = FALSE; 
  return lRet;
}
  66
  67 void CWinSel::SetFinderToolImage(HWND hwndDialog, BOOL full) {
  68   HBITMAP hBmpToSet = NULL;
  69   if(full) {
  70     // Set a FILLED image.
  71     hBmpToSet = g_hBitmapFinderToolFilled;
  }
  72   else {
  73     // Set an EMPTY image.
    hBmpToSet = g_hBitmapFinderToolEmpty;
  74   }
  75   SendDlgItemMessage 
    (
    (HWND) hwndDialog,   // handle of dialog box
  76     (int)IDC_DRAGCONTROL, // identifier of control
  77     (UINT) STM_SETIMAGE,  // message to send
  78     (WPARAM) IMAGE_BITMAP,        // first message parameter
  79     (LPARAM) hBmpToSet    // second message parameter
  80     );
  81 }
  82
  83 LRESULT CWinSel::WndProc(HWND Window, UINT message, WPARAM wParam, LPARAM lParam) {
  84   switch (message) {
  85   case WM_MOUSEMOVE: {
    if(g_bStartSearchWindow) {
  86       // Only when we have started the
  87       // Window Searching operation will we
  88       // track mouse movement.
  89       DoMouseMove(Window, message, wParam, lParam);
    }
    return TRUE;
    break;
  }
  90   case WM_LBUTTONUP: {
    if(g_bStartSearchWindow)
    {
  91       // Only when we have started the
  92       // window searching operation will we
  93       // be interested when the user lifts
  94       // up the left mouse button.
  95       DoMouseUp(Window, message, wParam, lParam);
      SetFinderToolImage(Window, TRUE); 
    }
    return TRUE;
    break;   
  }
  96   case WM_INITDIALOG:
  97     {
  98       if(!m_hwnd) {             // If this is the initial dialog for the first time
  99         m_hwnd = Window;
 100       }
 101       return TRUE;
 102       break;
 103     }
 104   case WM_COMMAND:
 105     switch (LOWORD(wParam)) {
 106     case (IDC_DISPLAY):
 107       if(HIWORD(wParam) == EN_CHANGE) {
 108         HWND Control = GetDlgItem(Window, IDC_DISPLAY);
 109         LRESULT BufferLength = SendMessage(Control, WM_GETTEXTLENGTH, 0, 0) + 1;        // +1 to allow for terminator
 110         TCHAR *Buffer = new TCHAR[BufferLength];
 111         SendMessage(Control, WM_GETTEXT, BufferLength, (LPARAM) Buffer);
 112         std::string ItemName;
 113         SendMessage(GetDlgItem(Window, IDC_TEXT), WM_SETTEXT, 0, (LPARAM) Buffer);
 114         delete[]Buffer;
 115       }
 116       break;
 117     case (IDOK):
 118       m_pEdit->SetWindow(g_hwndFoundWindow);
 119       // Fall through
 120     case (IDCANCEL):
 121       {
 122         EndDialog(Window, LOWORD(wParam));
 123         return TRUE;
 124       }
 125     case IDC_DRAGCONTROL:
 126       {
 127         SearchWindow(Window);
 128         return TRUE;
 129         break;
 130       }
 131     }
 132   default:
 133     return FALSE;
 134   }
 135 }