reactos/base/applications/mspaint/scrollbox.cpp

   1 /*
   2  * PROJECT:     PAINT for ReactOS
   3  * LICENSE:     LGPL
   4  * FILE:        base/applications/mspaint/scrollbox.cpp
   5  * PURPOSE:     Functionality surrounding the scroll box window class
   6  * PROGRAMMERS: Benedikt Freisen
   7  */
   8
   9 /* INCLUDES *********************************************************/
  10
  11 #include "precomp.h"
  12
  13 /* FUNCTIONS ********************************************************/
  14
  15 void
  16 UpdateScrollbox()
  17 {
  18     RECT clientRectScrollbox;
  19     RECT clientRectImageArea;
  20     SCROLLINFO si;
  21     scrollboxWindow.GetClientRect(&clientRectScrollbox);
  22     imageArea.GetClientRect(&clientRectImageArea);
  23     si.cbSize = sizeof(SCROLLINFO);
  24     si.fMask  = SIF_PAGE | SIF_RANGE;
  25     si.nMax   = clientRectImageArea.right + 6 - 1;
  26     si.nMin   = 0;
  27     si.nPage  = clientRectScrollbox.right;
  28     scrollboxWindow.SetScrollInfo(SB_HORZ, &si);
  29     scrollboxWindow.GetClientRect(&clientRectScrollbox);
  30     si.nMax   = clientRectImageArea.bottom + 6 - 1;
  31     si.nPage  = clientRectScrollbox.bottom;
  32     scrollboxWindow.SetScrollInfo(SB_VERT, &si);
  33     scrlClientWindow.MoveWindow(
  34         -scrollboxWindow.GetScrollPos(SB_HORZ), -scrollboxWindow.GetScrollPos(SB_VERT),
  35         max(clientRectImageArea.right + 6, clientRectScrollbox.right),
  36         max(clientRectImageArea.bottom + 6, clientRectScrollbox.bottom), TRUE);
  37 }
  38
  39 LRESULT CScrollboxWindow::OnSize(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
  40 {
  41     if (m_hWnd == scrollboxWindow.m_hWnd)
  42     {
  43         UpdateScrollbox();
  44     }
  45     return 0;
  46 }
  47
  48 LRESULT CScrollboxWindow::OnHScroll(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
  49 {
  50     if (m_hWnd == scrollboxWindow.m_hWnd)
  51     {
  52         SCROLLINFO si;
  53         si.cbSize = sizeof(SCROLLINFO);
  54         si.fMask = SIF_ALL;
  55         scrollboxWindow.GetScrollInfo(SB_HORZ, &si);
  56         switch (LOWORD(wParam))
  57         {
  58             case SB_THUMBTRACK:
  59             case SB_THUMBPOSITION:
  60                 si.nPos = HIWORD(wParam);
  61                 break;
  62             case SB_LINELEFT:
  63                 si.nPos -= 5;
  64                 break;
  65             case SB_LINERIGHT:
  66                 si.nPos += 5;
  67                 break;
  68             case SB_PAGELEFT:
  69                 si.nPos -= si.nPage;
  70                 break;
  71             case SB_PAGERIGHT:
  72                 si.nPos += si.nPage;
  73                 break;
  74         }
  75         scrollboxWindow.SetScrollInfo(SB_HORZ, &si);
  76         scrlClientWindow.MoveWindow(-scrollboxWindow.GetScrollPos(SB_HORZ),
  77                    -scrollboxWindow.GetScrollPos(SB_VERT), imageModel.GetWidth() * toolsModel.GetZoom() / 1000 + 6,
  78                    imageModel.GetHeight() * toolsModel.GetZoom() / 1000 + 6, TRUE);
  79     }
  80     return 0;
  81 }
  82
  83 LRESULT CScrollboxWindow::OnVScroll(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
  84 {
  85     if (m_hWnd == scrollboxWindow.m_hWnd)
  86     {
  87         SCROLLINFO si;
  88         si.cbSize = sizeof(SCROLLINFO);
  89         si.fMask = SIF_ALL;
  90         scrollboxWindow.GetScrollInfo(SB_VERT, &si);
  91         switch (LOWORD(wParam))
  92         {
  93             case SB_THUMBTRACK:
  94             case SB_THUMBPOSITION:
  95                 si.nPos = HIWORD(wParam);
  96                 break;
  97             case SB_LINEUP:
  98                 si.nPos -= 5;
  99                 break;
 100             case SB_LINEDOWN:
 101                 si.nPos += 5;
 102                 break;
 103             case SB_PAGEUP:
 104                 si.nPos -= si.nPage;
 105                 break;
 106             case SB_PAGEDOWN:
 107                 si.nPos += si.nPage;
 108                 break;
 109         }
 110         scrollboxWindow.SetScrollInfo(SB_VERT, &si);
 111         scrlClientWindow.MoveWindow(-scrollboxWindow.GetScrollPos(SB_HORZ),
 112                    -scrollboxWindow.GetScrollPos(SB_VERT), imageModel.GetWidth() * toolsModel.GetZoom() / 1000 + 6,
 113                    imageModel.GetHeight() * toolsModel.GetZoom() / 1000 + 6, TRUE);
 114     }
 115     return 0;
 116 }