base/applications/mspaint/selection.cpp

   1 /*
   2  * PROJECT:     PAINT for ReactOS
   3  * LICENSE:     LGPL
   4  * FILE:        base/applications/mspaint/selection.cpp
   5  * PURPOSE:     Window procedure of the selection window
   6  * PROGRAMMERS: Benedikt Freisen
   7  *              Katayama Hirofumi MZ
   8  */
   9
  10 #include "precomp.h"
  11
  12 CSelectionWindow selectionWindow;
  13
  14 /* FUNCTIONS ********************************************************/
  15
  16 const LPCTSTR CSelectionWindow::m_lpszCursorLUT[9] = { /* action to mouse cursor lookup table */
  17     IDC_SIZEALL,
  18
  19     IDC_SIZENWSE, IDC_SIZENS, IDC_SIZENESW,
  20     IDC_SIZEWE,               IDC_SIZEWE,
  21     IDC_SIZENESW, IDC_SIZENS, IDC_SIZENWSE
  22 };
  23
  24 void CSelectionWindow::ForceRefreshSelectionContents()
  25 {
  26     if (::IsWindowVisible(selectionWindow))
  27     {
  28         imageModel.ResetToPrevious();
  29         imageModel.DrawSelectionBackground(m_rgbBack);
  30         selectionModel.DrawSelection(imageModel.GetDC(), paletteModel.GetBgColor(), toolsModel.IsBackgroundTransparent());
  31     }
  32 }
  33
  34 int CSelectionWindow::IdentifyCorner(int iXPos, int iYPos, int iWidth, int iHeight)
  35 {
  36     return 0;
  37 }
  38
  39 LRESULT CSelectionWindow::OnPaint(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
  40 {
  41     PAINTSTRUCT ps;
  42     HDC hDC = BeginPaint(&ps);
  43     if (!m_bMoving)
  44     {
  45         RECT rcClient;
  46         GetClientRect(&rcClient);
  47         drawSizeBoxes(hDC, &rcClient, TRUE, &ps.rcPaint);
  48     }
  49     EndPaint(&ps);
  50     return 0;
  51 }
  52
  53 LRESULT CSelectionWindow::OnEraseBkgnd(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
  54 {
  55     // do nothing => transparent background
  56     return TRUE;
  57 }
  58
  59 LRESULT CSelectionWindow::OnCreate(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
  60 {
  61     m_bMoving = FALSE;
  62     m_iAction = ACTION_MOVE;
  63     /* update the system selection color */
  64     Invalidate();
  65     return 0;
  66 }
  67
  68 LRESULT CSelectionWindow::OnSysColorChange(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
  69 {
  70     /* update the system selection color */
  71     Invalidate();
  72     return 0;
  73 }
  74
  75 LRESULT CSelectionWindow::OnSetCursor(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
  76 {
  77     RECT rcClient;
  78     GetClientRect(&rcClient);
  79
  80     POINT pt;
  81     ::GetCursorPos(&pt);
  82     ScreenToClient(&pt);
  83
  84     if (!setCursorOnSizeBox(getSizeBoxHitTest(pt, &rcClient)))
  85         ::SetCursor(::LoadCursor(NULL, IDC_SIZEALL));
  86
  87     return 0;
  88 }
  89
  90 LRESULT CSelectionWindow::OnLButtonDown(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
  91 {
  92     m_ptPos.x = GET_X_LPARAM(lParam);
  93     m_ptPos.y = GET_Y_LPARAM(lParam);
  94     m_ptDelta.x = 0;
  95     m_ptDelta.y = 0;
  96     SetCapture();
  97     if (m_iAction != ACTION_MOVE)
  98         SetCursor(LoadCursor(NULL, m_lpszCursorLUT[m_iAction]));
  99     m_bMoving = TRUE;
 100     imageArea.InvalidateRect(NULL, FALSE);
 101     imageArea.SendMessage(WM_PAINT, 0, 0);
 102     m_rgbBack = paletteModel.GetBgColor();
 103     return 0;
 104 }
 105
 106 LRESULT CSelectionWindow::OnMouseMove(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
 107 {
 108     if (m_bMoving)
 109     {
 110         imageModel.ResetToPrevious();
 111         imageModel.DrawSelectionBackground(m_rgbBack);
 112         m_ptFrac.x += GET_X_LPARAM(lParam) - m_ptPos.x;
 113         m_ptFrac.y += GET_Y_LPARAM(lParam) - m_ptPos.y;
 114         m_ptDelta.x += UnZoomed(m_ptFrac.x);
 115         m_ptDelta.y += UnZoomed(m_ptFrac.y);
 116         if (toolsModel.GetZoom() < 1000)
 117         {
 118             m_ptFrac.x = 0;
 119             m_ptFrac.y = 0;
 120         }
 121         else
 122         {
 123             m_ptFrac.x -= Zoomed(UnZoomed(m_ptFrac.x));
 124             m_ptFrac.y -= Zoomed(UnZoomed(m_ptFrac.y));
 125         }
 126         selectionModel.ModifyDestRect(m_ptDelta, m_iAction);
 127
 128         CString strSize;
 129         strSize.Format(_T("%ld x %ld"), selectionModel.GetDestRectWidth(), selectionModel.GetDestRectHeight());
 130         SendMessage(hStatusBar, SB_SETTEXT, 2, (LPARAM) (LPCTSTR) strSize);
 131
 132         if (m_iAction != ACTION_MOVE)
 133             selectionModel.DrawSelectionStretched(imageModel.GetDC());
 134         else
 135             selectionModel.DrawSelection(imageModel.GetDC(), paletteModel.GetBgColor(), toolsModel.IsBackgroundTransparent());
 136         imageArea.InvalidateRect(NULL, FALSE);
 137         imageArea.SendMessage(WM_PAINT, 0, 0);
 138         m_ptPos.x = GET_X_LPARAM(lParam);
 139         m_ptPos.y = GET_Y_LPARAM(lParam);
 140     }
 141     else
 142     {
 143         int w = Zoomed(selectionModel.GetDestRectWidth()) + 2 * GRIP_SIZE;
 144         int h = Zoomed(selectionModel.GetDestRectHeight()) + 2 * GRIP_SIZE;
 145         m_ptPos.x = GET_X_LPARAM(lParam);
 146         m_ptPos.y = GET_Y_LPARAM(lParam);
 147         SendMessage(hStatusBar, SB_SETTEXT, 2, (LPARAM) NULL);
 148         m_iAction = IdentifyCorner(m_ptPos.x, m_ptPos.y, w, h);
 149         if (m_iAction != ACTION_MOVE)
 150             SetCursor(LoadCursor(NULL, m_lpszCursorLUT[m_iAction]));
 151     }
 152     return 0;
 153 }
 154
 155 LRESULT CSelectionWindow::OnMove(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
 156 {
 157     m_bMoved = TRUE;
 158     return 0;
 159 }
 160
 161 LRESULT CSelectionWindow::OnLButtonUp(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
 162 {
 163     if (m_bMoving)
 164     {
 165         m_bMoving = FALSE;
 166         ReleaseCapture();
 167         if (m_iAction != ACTION_MOVE && toolsModel.GetActiveTool() != TOOL_TEXT)
 168         {
 169             imageModel.Undo();
 170             imageModel.DrawSelectionBackground(m_rgbBack);
 171             selectionModel.ScaleContentsToFit();
 172             imageModel.CopyPrevious();
 173         }
 174         placeSelWin();
 175     }
 176     return 0;
 177 }
 178
 179 LRESULT CSelectionWindow::OnCaptureChanged(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
 180 {
 181     if (m_bMoving)
 182     {
 183         m_bMoving = FALSE;
 184         if (m_iAction == ACTION_MOVE)
 185         {
 186             if (toolsModel.GetActiveTool() == TOOL_RECTSEL)
 187                 imageArea.cancelDrawing();
 188             else
 189                 placeSelWin();
 190         }
 191         else
 192         {
 193             m_iAction = ACTION_MOVE;
 194         }
 195         ShowWindow(SW_HIDE);
 196     }
 197     return 0;
 198 }
 199
 200 LRESULT CSelectionWindow::OnKeyDown(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
 201 {
 202     if (wParam == VK_ESCAPE)
 203     {
 204         if (GetCapture() == m_hWnd)
 205         {
 206             ReleaseCapture();
 207         }
 208     }
 209     return 0;
 210 }
 211
 212 LRESULT CSelectionWindow::OnPaletteModelColorChanged(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
 213 {
 214     return 0;
 215 }
 216
 217 LRESULT CSelectionWindow::OnToolsModelSettingsChanged(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
 218 {
 219     return 0;
 220 }
 221
 222 LRESULT CSelectionWindow::OnSelectionModelRefreshNeeded(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
 223 {
 224     ForceRefreshSelectionContents();
 225     return 0;
 226 }
 227
 228 LRESULT CSelectionWindow::OnMouseWheel(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
 229 {
 230     return ::SendMessage(GetParent(), nMsg, wParam, lParam);
 231 }
 232
 233 LRESULT CSelectionWindow::OnToolsModelZoomChanged(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
 234 {
 235     placeSelWin();
 236     return 0;
 237 }