reactos/base/applications/mspaint/selection.cpp

   1 /*
   2  * PROJECT:     PAINT for ReactOS
   3  * LICENSE:     LGPL
   4  * FILE:        base/applications/mspaint_new/selection.cpp
   5  * PURPOSE:     Window procedure of the selection window
   6  * PROGRAMMERS: Benedikt Freisen
   7  */
   8
   9 /* INCLUDES *********************************************************/
  10
  11 #include "precomp.h"
  12
  13 /* FUNCTIONS ********************************************************/
  14
  15 const LPCTSTR CSelectionWindow::m_lpszCursorLUT[9] = { /* action to mouse cursor lookup table */
  16     IDC_SIZEALL,
  17
  18     IDC_SIZENWSE, IDC_SIZENS, IDC_SIZENESW,
  19     IDC_SIZEWE,               IDC_SIZEWE,
  20     IDC_SIZENESW, IDC_SIZENS, IDC_SIZENWSE
  21 };
  22
  23 BOOL
  24 ColorKeyedMaskBlt(HDC hdcDest, int nXDest, int nYDest, int nWidth, int nHeight, HDC hdcSrc, int nXSrc, int nYSrc, HBITMAP hbmMask, int xMask, int yMask, DWORD dwRop, COLORREF keyColor)
  25 {
  26     HDC hTempDC;
  27     HDC hTempDC2;
  28     HBITMAP hTempBm;
  29     HBRUSH hTempBrush;
  30     HBITMAP hTempMask;
  31
  32     hTempDC = CreateCompatibleDC(hdcSrc);
  33     hTempDC2 = CreateCompatibleDC(hdcSrc);
  34     hTempBm = CreateCompatibleBitmap(hTempDC, nWidth, nHeight);
  35     SelectObject(hTempDC, hTempBm);
  36     hTempBrush = CreateSolidBrush(keyColor);
  37     SelectObject(hTempDC, hTempBrush);
  38     BitBlt(hTempDC, 0, 0, nWidth, nHeight, hdcSrc, nXSrc, nYSrc, SRCCOPY);
  39     PatBlt(hTempDC, 0, 0, nWidth, nHeight, PATINVERT);
  40     hTempMask = CreateBitmap(nWidth, nHeight, 1, 1, NULL);
  41     SelectObject(hTempDC2, hTempMask);
  42     BitBlt(hTempDC2, 0, 0, nWidth, nHeight, hTempDC, 0, 0, SRCCOPY);
  43     SelectObject(hTempDC, hbmMask);
  44     BitBlt(hTempDC2, 0, 0, nWidth, nHeight, hTempDC, xMask, yMask, SRCAND);
  45     MaskBlt(hdcDest, nXDest, nYDest, nWidth, nHeight, hdcSrc, nXSrc, nYSrc, hTempMask, xMask, yMask, dwRop);
  46     DeleteDC(hTempDC);
  47     DeleteDC(hTempDC2);
  48     DeleteObject(hTempBm);
  49     DeleteObject(hTempBrush);
  50     DeleteObject(hTempMask);
  51     return TRUE;
  52 }
  53
  54 void
  55 ForceRefreshSelectionContents()
  56 {
  57     if (selectionWindow.IsWindowVisible())
  58     {
  59         selectionWindow.SendMessage(WM_LBUTTONDOWN, 0, MAKELPARAM(0, 0));
  60         selectionWindow.SendMessage(WM_MOUSEMOVE,   0, MAKELPARAM(0, 0));
  61         selectionWindow.SendMessage(WM_LBUTTONUP,   0, MAKELPARAM(0, 0));
  62     }
  63 }
  64
  65 int CSelectionWindow::IdentifyCorner(int iXPos, int iYPos, int iWidth, int iHeight)
  66 {
  67     if (iYPos < 3)
  68     {
  69         if (iXPos < 3)
  70             return ACTION_RESIZE_TOP_LEFT;
  71         if ((iXPos < iWidth / 2 + 2) && (iXPos >= iWidth / 2 - 1))
  72             return ACTION_RESIZE_TOP;
  73         if (iXPos >= iWidth - 3)
  74             return ACTION_RESIZE_TOP_RIGHT;
  75     }
  76     if ((iYPos < iHeight / 2 + 2) && (iYPos >= iHeight / 2 - 1))
  77     {
  78         if (iXPos < 3)
  79             return ACTION_RESIZE_LEFT;
  80         if (iXPos >= iWidth - 3)
  81             return ACTION_RESIZE_RIGHT;
  82     }
  83     if (iYPos >= iHeight - 3)
  84     {
  85         if (iXPos < 3)
  86             return ACTION_RESIZE_BOTTOM_LEFT;
  87         if ((iXPos < iWidth / 2 + 2) && (iXPos >= iWidth / 2 - 1))
  88             return ACTION_RESIZE_BOTTOM;
  89         if (iXPos >= iWidth - 3)
  90             return ACTION_RESIZE_BOTTOM_RIGHT;
  91     }
  92     return 0;
  93 }
  94
  95 LRESULT CSelectionWindow::OnPaint(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
  96 {
  97     if (!m_bMoving)
  98     {
  99         HDC hDC = GetDC();
 100         DefWindowProc(WM_PAINT, wParam, lParam);
 101         SelectionFrame(hDC, 1, 1, selectionModel.GetDestRectWidth() * toolsModel.GetZoom() / 1000 + 5,
 102                        selectionModel.GetDestRectHeight() * toolsModel.GetZoom() / 1000 + 5,
 103                        m_dwSystemSelectionColor);
 104         ReleaseDC(hDC);
 105     }
 106     return 0;
 107 }
 108
 109 LRESULT CSelectionWindow::OnEraseBkgnd(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
 110 {
 111     // do nothing => transparent background
 112     return 0;
 113 }
 114
 115 LRESULT CSelectionWindow::OnCreate(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
 116 {
 117     m_bMoving = FALSE;
 118     m_iAction = ACTION_MOVE;
 119     /* update the system selection color */
 120     m_dwSystemSelectionColor = GetSysColor(COLOR_HIGHLIGHT);
 121     SendMessage(WM_PAINT, 0, MAKELPARAM(0, 0));
 122     return 0;
 123 }
 124
 125 LRESULT CSelectionWindow::OnSysColorChange(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
 126 {
 127     /* update the system selection color */
 128     m_dwSystemSelectionColor = GetSysColor(COLOR_HIGHLIGHT);
 129     SendMessage(WM_PAINT, 0, MAKELPARAM(0, 0));
 130     return 0;
 131 }
 132
 133 LRESULT CSelectionWindow::OnSetCursor(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
 134 {
 135     SetCursor(LoadCursor(NULL, IDC_SIZEALL));
 136     return 0;
 137 }
 138
 139 LRESULT CSelectionWindow::OnLButtonDown(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
 140 {
 141     m_ptPos.x = GET_X_LPARAM(lParam);
 142     m_ptPos.y = GET_Y_LPARAM(lParam);
 143     m_ptDelta.x = 0;
 144     m_ptDelta.y = 0;
 145     SetCapture();
 146     if (m_iAction != ACTION_MOVE)
 147         SetCursor(LoadCursor(NULL, m_lpszCursorLUT[m_iAction]));
 148     m_bMoving = TRUE;
 149     scrlClientWindow.InvalidateRect(NULL, TRUE);
 150     imageArea.SendMessage(WM_PAINT, 0, 0);
 151     return 0;
 152 }
 153
 154 LRESULT CSelectionWindow::OnMouseMove(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
 155 {
 156     if (m_bMoving)
 157     {
 158         TCHAR sizeStr[100];
 159         imageModel.ResetToPrevious();
 160         m_ptFrac.x += GET_X_LPARAM(lParam) - m_ptPos.x;
 161         m_ptFrac.y += GET_Y_LPARAM(lParam) - m_ptPos.y;
 162         m_ptDelta.x += m_ptFrac.x * 1000 / toolsModel.GetZoom();
 163         m_ptDelta.y += m_ptFrac.y * 1000 / toolsModel.GetZoom();
 164         if (toolsModel.GetZoom() < 1000)
 165         {
 166             m_ptFrac.x = 0;
 167             m_ptFrac.y = 0;
 168         }
 169         else
 170         {
 171             m_ptFrac.x -= (m_ptFrac.x * 1000 / toolsModel.GetZoom()) * toolsModel.GetZoom() / 1000;
 172             m_ptFrac.y -= (m_ptFrac.y * 1000 / toolsModel.GetZoom()) * toolsModel.GetZoom() / 1000;
 173         }
 174         selectionModel.ModifyDestRect(m_ptDelta, m_iAction);
 175
 176         _stprintf(sizeStr, _T("%d x %d"), selectionModel.GetDestRectWidth(), selectionModel.GetDestRectHeight());
 177         SendMessage(hStatusBar, SB_SETTEXT, 2, (LPARAM) sizeStr);
 178
 179         if (toolsModel.GetActiveTool() == TOOL_TEXT)
 180         {
 181             selectionModel.DrawTextToolText(imageModel.GetDC(), paletteModel.GetFgColor(), paletteModel.GetBgColor(), toolsModel.IsBackgroundTransparent());
 182         }
 183         else
 184         {
 185             if (m_iAction != ACTION_MOVE)
 186                 selectionModel.DrawSelectionStretched(imageModel.GetDC());
 187             else
 188                 selectionModel.DrawSelection(imageModel.GetDC(), paletteModel.GetBgColor(), toolsModel.IsBackgroundTransparent());
 189         }
 190         imageArea.InvalidateRect(NULL, FALSE);
 191         imageArea.SendMessage(WM_PAINT, 0, 0);
 192         m_ptPos.x = GET_X_LPARAM(lParam);
 193         m_ptPos.y = GET_Y_LPARAM(lParam);
 194     }
 195     else
 196     {
 197         int w = selectionModel.GetDestRectWidth() * toolsModel.GetZoom() / 1000 + 6;
 198         int h = selectionModel.GetDestRectHeight() * toolsModel.GetZoom() / 1000 + 6;
 199         m_ptPos.x = GET_X_LPARAM(lParam);
 200         m_ptPos.y = GET_Y_LPARAM(lParam);
 201         SendMessage(hStatusBar, SB_SETTEXT, 2, (LPARAM) NULL);
 202         m_iAction = IdentifyCorner(m_ptPos.x, m_ptPos.y, w, h);
 203         if (m_iAction != ACTION_MOVE)
 204             SetCursor(LoadCursor(NULL, m_lpszCursorLUT[m_iAction]));
 205     }
 206     return 0;
 207 }
 208
 209 LRESULT CSelectionWindow::OnLButtonUp(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
 210 {
 211     if (m_bMoving)
 212     {
 213         m_bMoving = FALSE;
 214         ReleaseCapture();
 215         if (m_iAction != ACTION_MOVE)
 216         {
 217             if (toolsModel.GetActiveTool() == TOOL_TEXT)
 218             {
 219                 // FIXME: What to do?
 220             }
 221             else
 222             {
 223                 selectionModel.ScaleContentsToFit();
 224             }
 225         }
 226         placeSelWin();
 227         ShowWindow(SW_HIDE);
 228         ShowWindow(SW_SHOW);
 229     }
 230     return 0;
 231 }
 232
 233 LRESULT CSelectionWindow::OnPaletteModelColorChanged(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
 234 {
 235     if (toolsModel.GetActiveTool() == TOOL_TEXT)
 236         ForceRefreshSelectionContents();
 237     return 0;
 238 }
 239
 240 LRESULT CSelectionWindow::OnToolsModelSettingsChanged(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
 241 {
 242     if (toolsModel.GetActiveTool() == TOOL_FREESEL ||
 243         toolsModel.GetActiveTool() == TOOL_RECTSEL ||
 244         toolsModel.GetActiveTool() == TOOL_TEXT)
 245         ForceRefreshSelectionContents();
 246     return 0;
 247 }
 248
 249 LRESULT CSelectionWindow::OnSelectionModelRefreshNeeded(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
 250 {
 251     ForceRefreshSelectionContents();
 252     return 0;
 253 }