src/msw/statbox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        statbox.cpp
   3 // Purpose:     wxStaticBox
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "statbox.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20 #pragma hdrstop
  21 #endif
  22
  23 #include "wx/window.h"
  24 #include "wx/msw/private.h"
  25
  26 #ifndef WX_PRECOMP
  27 #include "wx/app.h"
  28 #include "wx/dcclient.h"
  29 #endif
  30
  31 #include "wx/statbox.h"
  32
  33 #if !USE_SHARED_LIBRARY
  34 IMPLEMENT_DYNAMIC_CLASS(wxStaticBox, wxControl)
  35
  36 BEGIN_EVENT_TABLE(wxStaticBox, wxControl)
  37     EVT_ERASE_BACKGROUND(wxStaticBox::OnEraseBackground)
  38 END_EVENT_TABLE()
  39
  40 #endif
  41
  42 /*
  43  * Group box
  44  */
  45
  46 bool wxStaticBox::Create(wxWindow *parent, wxWindowID id,
  47            const wxString& label,
  48            const wxPoint& pos,
  49            const wxSize& size,
  50            long style,
  51            const wxString& name)
  52 {
  53   SetName(name);
  54
  55   if (parent) parent->AddChild(this);
  56
  57   SetBackgroundColour(parent->GetBackgroundColour()) ;
  58   SetForegroundColour(parent->GetForegroundColour()) ;
  59
  60   if ( id == -1 )
  61       m_windowId = (int)NewControlId();
  62   else
  63     m_windowId = id;
  64
  65   int x = pos.x;
  66   int y = pos.y;
  67   int width = size.x;
  68   int height = size.y;
  69
  70   m_windowStyle = style;
  71
  72   long msStyle = BS_GROUPBOX | WS_CHILD | WS_VISIBLE ; // GROUP_FLAGS;
  73
  74   bool want3D;
  75   WXDWORD exStyle = Determine3DEffects(0, &want3D) ;
  76
  77   HWND wx_button =
  78     CreateWindowEx(exStyle, _T("BUTTON"), (const wxChar *)label, msStyle,
  79                     0, 0, 0, 0, (HWND) parent->GetHWND(), (HMENU)m_windowId,
  80                     wxGetInstance(), NULL);
  81 #if wxUSE_CTL3D
  82   if (want3D)
  83   {
  84     Ctl3dSubclassCtl(wx_button);
  85       m_useCtl3D = TRUE;
  86   }
  87 #endif
  88
  89   m_hWnd = (WXHWND)wx_button;
  90
  91   // Subclass again for purposes of dialog editing mode
  92   SubclassWin(GetHWND());
  93
  94   SetFont(parent->GetFont());
  95
  96   SetSize(x, y, width, height);
  97   ShowWindow(wx_button, SW_SHOW);
  98
  99   return TRUE;
 100 }
 101
 102 wxSize wxStaticBox::DoGetBestSize()
 103 {
 104     int cx, cy;
 105     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
 106
 107     int wBox;
 108     GetTextExtent(wxGetWindowText(m_hWnd), &wBox, &cy);
 109
 110     wBox += 3*cx;
 111     int hBox = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
 112
 113     return wxSize(wBox, hBox);
 114 }
 115
 116 WXHBRUSH wxStaticBox::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
 117                                  WXUINT message,
 118                                  WXWPARAM wParam,
 119                                  WXLPARAM lParam)
 120 {
 121 #if wxUSE_CTL3D
 122   if ( m_useCtl3D )
 123   {
 124     HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
 125     return (WXHBRUSH) hbrush;
 126   }
 127 #endif
 128
 129   if (GetParent()->GetTransparentBackground())
 130     SetBkMode((HDC) pDC, TRANSPARENT);
 131   else
 132     SetBkMode((HDC) pDC, OPAQUE);
 133
 134   ::SetBkColor((HDC) pDC, RGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
 135   ::SetTextColor((HDC) pDC, RGB(GetForegroundColour().Red(), GetForegroundColour().Green(), GetForegroundColour().Blue()));
 136
 137   wxBrush *backgroundBrush = wxTheBrushList->FindOrCreateBrush(GetBackgroundColour(), wxSOLID);
 138
 139   // Note that this will be cleaned up in wxApp::OnIdle, if backgroundBrush
 140   // has a zero usage count.
 141 //  backgroundBrush->RealizeResource();
 142   return (WXHBRUSH) backgroundBrush->GetResourceHandle();
 143 }
 144
 145 // Shouldn't erase the whole window, since the static box must only paint its
 146 // outline.
 147 void wxStaticBox::OnEraseBackground(wxEraseEvent& event)
 148 {
 149     // If we don't have this (call Default()), we don't paint the background properly.
 150     // If we do have this, we seem to overwrite enclosed controls.
 151     // Is it the WS_CLIPCHILDREN style that's causing the problems?
 152     // Probably - without this style, the background of the window will show through,
 153     // so the control doesn't have to paint it. The window background will always be
 154     // painted before all other controls, therefore there are no problems with
 155     // controls being hidden by the static box.
 156     // So, if we could specify wxCLIP_CHILDREN in window, or not, we could optimise painting better.
 157     // We would assume wxCLIP_CHILDREN in a frame and a scrolled window, but not in a panel.
 158     // Is this too platform-specific?? What else can we do? Not a lot, since we have to pass
 159     // this information from arbitrary wxWindow derivatives, and it depends on what you wish to
 160     // do with the windows.
 161     // Alternatively, just make sure that wxStaticBox is always at the back! There are probably
 162     // few other circumstances where it matters about child clipping. But what about painting onto
 163     // to panel, inside a groupbox? Doesn't appear, because the box wipes it out.
 164     wxWindow *parent = GetParent();
 165     if ( parent && parent->GetHWND() && (::GetWindowLong((HWND) parent->GetHWND(), GWL_STYLE) & WS_CLIPCHILDREN) )
 166     {
 167         // TODO: May in fact need to generate a paint event for inside this
 168         // control's rectangle, otherwise all controls are going to be clipped -
 169         // ugh.
 170         HBRUSH hBrush = ::CreateSolidBrush(PALETTERGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
 171         int mode = ::SetMapMode((HDC) event.GetDC()->GetHDC(), MM_TEXT);
 172
 173         RECT rect;
 174
 175         ::GetClientRect(GetHwnd(), &rect);
 176         ::FillRect ((HDC) event.GetDC()->GetHDC(), &rect, hBrush);
 177         ::DeleteObject(hBrush);
 178         ::SetMapMode((HDC) event.GetDC()->GetHDC(), mode);
 179     }
 180     else
 181     {
 182         event.Skip();
 183     }
 184 }
 185
 186 long wxStaticBox::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
 187 {
 188     if ( nMsg == WM_NCHITTEST)
 189     {
 190         int xPos = LOWORD(lParam);  // horizontal position of cursor
 191         int yPos = HIWORD(lParam);  // vertical position of cursor
 192
 193         ScreenToClient(&xPos, &yPos);
 194
 195         // Make sure you can drag by the top of the groupbox, but let
 196         // other (enclosed) controls get mouse events also
 197         if (yPos < 10)
 198             return (long)HTCLIENT;
 199     }
 200
 201     return wxControl::MSWWindowProc(nMsg, wParam, lParam);
 202 }
 203