Take src x, y into account when blitting with alpha

[wxWidgets.git] / src / msw / statbox.cpp

diff --git a/src/msw/statbox.cpp b/src/msw/statbox.cpp
index ea27a85d600d583b748cbed4f0525034b77155f7..88e485e64b57e19ecc41ab01e546dedf816c041c 100644 (file)
--- a/src/msw/statbox.cpp
+++ b/src/msw/statbox.cpp
@@ -40,8 +40,10 @@
 #include "wx/sysopt.h"
 #include "wx/image.h"
 #include "wx/dcmemory.h"
 #include "wx/sysopt.h"
 #include "wx/image.h"
 #include "wx/dcmemory.h"

+#include "wx/sysopt.h"

 
 #include "wx/msw/private.h"
 
 #include "wx/msw/private.h"

+#include "wx/msw/missing.h"

 
 // ----------------------------------------------------------------------------
 // wxWin macros
 
 // ----------------------------------------------------------------------------
 // wxWin macros


@@ -99,10 +101,6 @@ wxCONSTRUCTOR_6( wxStaticBox , wxWindow* , Parent , wxWindowID , Id , wxString ,
 IMPLEMENT_DYNAMIC_CLASS(wxStaticBox, wxControl)
 #endif
 
 IMPLEMENT_DYNAMIC_CLASS(wxStaticBox, wxControl)
 #endif
 

-BEGIN_EVENT_TABLE(wxStaticBox, wxControl)
-    EVT_PAINT(wxStaticBox::OnPaint)
-END_EVENT_TABLE()
-

 // ============================================================================
 // implementation
 // ============================================================================
 // ============================================================================
 // implementation
 // ============================================================================


@@ -125,9 +123,19 @@ bool wxStaticBox::Create(wxWindow *parent,
     if ( !MSWCreateControl(wxT("BUTTON"), label, pos, size) )
         return false;
 
     if ( !MSWCreateControl(wxT("BUTTON"), label, pos, size) )
         return false;
 

+#ifndef __WXWINCE__
+    if (!wxSystemOptions::IsFalse(wxT("msw.staticbox.optimized-paint")))
+        Connect(wxEVT_PAINT, wxPaintEventHandler(wxStaticBox::OnPaint));
+#endif // !__WXWINCE__
+

     return true;
 }
 
     return true;
 }
 

+wxBorder wxStaticBox::GetDefaultBorder() const
+{
+    return wxBORDER_NONE;
+}
+

 WXDWORD wxStaticBox::MSWGetStyle(long style, WXDWORD *exstyle) const
 {
     long styleWin = wxStaticBoxBase::MSWGetStyle(style, exstyle);
 WXDWORD wxStaticBox::MSWGetStyle(long style, WXDWORD *exstyle) const
 {
     long styleWin = wxStaticBoxBase::MSWGetStyle(style, exstyle);


@@ -137,7 +145,12 @@ WXDWORD wxStaticBox::MSWGetStyle(long style, WXDWORD *exstyle) const
     styleWin &= ~WS_CLIPCHILDREN;
 
     if ( exstyle )
     styleWin &= ~WS_CLIPCHILDREN;
 
     if ( exstyle )

-        *exstyle = 0;
+    {
+        if (wxSystemOptions::IsFalse(wxT("msw.staticbox.optimized-paint")))
+            *exstyle = WS_EX_TRANSPARENT;
+        else
+            *exstyle = 0;
+    }

 
     return styleWin | BS_GROUPBOX;
 }
 
     return styleWin | BS_GROUPBOX;
 }


@@ -156,9 +169,19 @@ wxSize wxStaticBox::DoGetBestSize() const
     return wxSize(wBox, hBox);
 }
 
     return wxSize(wBox, hBox);
 }
 

-WXLRESULT wxStaticBox::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
+void wxStaticBox::GetBordersForSizer(int *borderTop, int *borderOther) const

 {
 {

+    wxStaticBoxBase::GetBordersForSizer(borderTop, borderOther);
+
+    // need extra space, don't know how much but this seems to be enough
+    *borderTop += GetCharHeight()/3;
+}
+
+// all the hacks below are not necessary for WinCE

 #ifndef __WXWINCE__
 #ifndef __WXWINCE__

+
+WXLRESULT wxStaticBox::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
+{

     if ( nMsg == WM_NCHITTEST )
     {
         // This code breaks some other processing such as enter/leave tracking
     if ( nMsg == WM_NCHITTEST )
     {
         // This code breaks some other processing such as enter/leave tracking


@@ -169,8 +192,8 @@ WXLRESULT wxStaticBox::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lPar
             s_useHTClient = wxSystemOptions::GetOptionInt(wxT("msw.staticbox.htclient"));
         if (s_useHTClient == 1)
         {
             s_useHTClient = wxSystemOptions::GetOptionInt(wxT("msw.staticbox.htclient"));
         if (s_useHTClient == 1)
         {

-            int xPos = LOWORD(lParam);  // horizontal position of cursor
-            int yPos = HIWORD(lParam);  // vertical position of cursor
+            int xPos = GET_X_LPARAM(lParam);
+            int yPos = GET_Y_LPARAM(lParam);

 
             ScreenToClient(&xPos, &yPos);
 
 
             ScreenToClient(&xPos, &yPos);
 


@@ -180,148 +203,201 @@ WXLRESULT wxStaticBox::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lPar
                 return (long)HTCLIENT;
         }
     }
                 return (long)HTCLIENT;
         }
     }

-#endif // !__WXWINCE__

 
     return wxControl::MSWWindowProc(nMsg, wParam, lParam);
 }
 
 
     return wxControl::MSWWindowProc(nMsg, wParam, lParam);
 }
 

-void wxStaticBox::GetBordersForSizer(int *borderTop, int *borderOther) const
+// ----------------------------------------------------------------------------
+// static box drawing
+// ----------------------------------------------------------------------------
+
+/*
+   We draw the static box ourselves because it's the only way to prevent it
+   from flickering horribly on resize (because everything inside the box is
+   erased twice: once when the box itself is repainted and second time when
+   the control inside it is repainted) without using WS_EX_TRANSPARENT style as
+   we used to do and which resulted in other problems.
+ */
+
+// MSWGetRegionWithoutSelf helper: removes the given rectangle from region
+static inline void
+SubtractRectFromRgn(HRGN hrgn, int left, int top, int right, int bottom)

 {
 {

-    wxStaticBoxBase::GetBordersForSizer(borderTop, borderOther);
+    AutoHRGN hrgnRect(::CreateRectRgn(left, top, right, bottom));
+    if ( !hrgnRect )
+    {
+        wxLogLastError(_T("CreateRectRgn()"));
+        return;
+    }

 
 

-    // if not using correct (but backwards cojmpatible) text metrics
-    // calculations, we need to add some extra margin or otherwise static box
-    // title is clipped
-#if !wxDIALOG_UNIT_COMPATIBILITY
-    if ( !GetLabel().empty() )
-        *borderTop += GetCharHeight()/3;
-#endif // !wxDIALOG_UNIT_COMPATIBILITY
+    ::CombineRgn(hrgn, hrgn, hrgnRect, RGN_DIFF);

 }
 
 }
 

-// rc must be in client coords!
-void wxStaticBox::MSWClipBoxRegion(WXHRGN hrgn, const WXRECTPTR rc)
+void wxStaticBox::MSWGetRegionWithoutSelf(WXHRGN hRgn, int w, int h)

 {
 {

-    HRGN hrgnchild;
+    HRGN hrgn = (HRGN)hRgn;
+
+    // remove the area occupied by the static box borders from the region
+    int borderTop, border;
+    GetBordersForSizer(&borderTop, &border);

 
     // top
 
     // top

-    hrgnchild = ::CreateRectRgn(0, 0, ((const RECT*) rc)->right, 14);
-    ::CombineRgn((HRGN) hrgn, (HRGN) hrgn, hrgnchild, RGN_DIFF);
-    ::DeleteObject(hrgnchild);
+    SubtractRectFromRgn(hrgn, 0, 0, w, borderTop);

 
     // bottom
 
     // bottom

-    hrgnchild = ::CreateRectRgn(0, ((const RECT*) rc)->bottom - 7, ((const RECT*) rc)->right, ((const RECT*) rc)->bottom);
-    ::CombineRgn((HRGN) hrgn, (HRGN) hrgn, hrgnchild, RGN_DIFF);
-    ::DeleteObject(hrgnchild);
+    SubtractRectFromRgn(hrgn, 0, h - border, w, h);

 
     // left
 
     // left

-    hrgnchild = ::CreateRectRgn(0, 0, 7, ((const RECT*) rc)->bottom);
-    ::CombineRgn((HRGN) hrgn, (HRGN) hrgn, hrgnchild, RGN_DIFF);
-    ::DeleteObject(hrgnchild);
+    SubtractRectFromRgn(hrgn, 0, 0, border, h);

 
     // right
 
     // right

-    hrgnchild = ::CreateRectRgn(((const RECT*) rc)->right - 7, 0, ((const RECT*) rc)->right, ((const RECT*) rc)->bottom);
-    ::CombineRgn((HRGN) hrgn, (HRGN) hrgn, hrgnchild, RGN_DIFF);
-    ::DeleteObject(hrgnchild);
+    SubtractRectFromRgn(hrgn, w - border, 0, w, h);

 }
 
 }
 

-WXHRGN wxStaticBox::MSWCalculateClippingRegion()
+WXHRGN wxStaticBox::MSWGetRegionWithoutChildren()

 {
     RECT rc;
     ::GetWindowRect(GetHwnd(), &rc);
     HRGN hrgn = ::CreateRectRgn(rc.left, rc.top, rc.right + 1, rc.bottom + 1);
 
 {
     RECT rc;
     ::GetWindowRect(GetHwnd(), &rc);
     HRGN hrgn = ::CreateRectRgn(rc.left, rc.top, rc.right + 1, rc.bottom + 1);
 

-    wxWindowList::compatibility_iterator node = GetParent()->GetChildren().GetFirst();
-    while ( node )
+    // iterate over all child windows (not just wxWindows but all windows)
+    for ( HWND child = ::GetWindow(GetHwndOf(GetParent()), GW_CHILD);
+          child;
+          child = ::GetWindow(child, GW_HWNDNEXT) )

     {
     {

-        wxWindow *child = node->GetData();
-
-        // can't just test for (this != child) here since if a wxStaticBox
-        // overlaps another wxStaticBox then neither are drawn. The overlapping
-        // region will flicker but we shouldn't have overlapping windows anyway.
-        if ( !child->IsKindOf(CLASSINFO(wxStaticBox)) )
+        if ( ! ::IsWindowVisible(child) )
+        {
+            // if the window isn't visible then it doesn't need clipped
+            continue;
+        }
+        
+        LONG style = ::GetWindowLong(child, GWL_STYLE);
+        wxString str(wxGetWindowClass(child));
+        str.UpperCase();
+        if ( str == wxT("BUTTON") && (style & BS_GROUPBOX) == BS_GROUPBOX )

         {
         {

-            ::GetWindowRect(GetHwndOf(child), &rc);
-            if ( RectInRegion(hrgn, &rc) )
+            // Don't clip any static boxes, not just this one.  This will
+            // result in flicker in overlapping static boxes, but at least
+            // they will all be drawn correctly and we shouldn't have
+            // overlapping windows anyway.
+            continue;
+        }
+        
+        ::GetWindowRect(child, &rc);
+        if ( ::RectInRegion(hrgn, &rc) )
+        {
+            // need to remove WS_CLIPSIBLINGS from all sibling windows
+            // that are within this staticbox if set
+            if ( style & WS_CLIPSIBLINGS )

             {
             {

-                // need to remove WS_CLIPSIBLINGS from all sibling windows
-                // that are within this staticbox if set
-                LONG style = ::GetWindowLong(GetHwndOf(child), GWL_STYLE);
-                if ( style & WS_CLIPSIBLINGS )
-                {
-                    style &= ~WS_CLIPSIBLINGS;
-                    ::SetWindowLong(GetHwndOf(child), GWL_STYLE, style);
-
-                    // MSDN: "If you have changed certain window data using
-                    // SetWindowLong, you must call SetWindowPos to have the
-                    // changes take effect."
-                    ::SetWindowPos(GetHwndOf(child), NULL, 0, 0, 0, 0,
-                                   SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER |
-                                   SWP_FRAMECHANGED);
-                }
-
-                HRGN hrgnchild = ::CreateRectRgnIndirect(&rc);
-                ::CombineRgn(hrgn, hrgn, hrgnchild, RGN_DIFF);
-                ::DeleteObject(hrgnchild);
+                style &= ~WS_CLIPSIBLINGS;
+                ::SetWindowLong(child, GWL_STYLE, style);
+                
+                // MSDN: "If you have changed certain window data using
+                // SetWindowLong, you must call SetWindowPos to have the
+                // changes take effect."
+                ::SetWindowPos(child, NULL, 0, 0, 0, 0,
+                               SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER |
+                               SWP_FRAMECHANGED);

             }
             }

+
+            AutoHRGN hrgnChild(::CreateRectRgnIndirect(&rc));
+            ::CombineRgn(hrgn, hrgn, hrgnChild, RGN_DIFF);

         }
         }

+    }
+
+    return (WXHRGN)hrgn;
+}

 
 

-        node = node->GetNext();
+// helper for OnPaint(): really erase the background, i.e. do it even if we
+// don't have any non default brush for doing it (DoEraseBackground() doesn't
+// do anything in such case)
+void wxStaticBox::PaintBackground(wxDC& dc, const RECT& rc)
+{
+    // note that we do not use the box background colour here, it shouldn't
+    // apply to its interior for several reasons:
+    //  1. wxGTK doesn't do it
+    //  2. controls inside the box don't get correct bg colour because they
+    //     are not our children so we'd have some really ugly colour mix if
+    //     we did it
+    //  3. this is backwards compatible behaviour and some people rely on it,
+    //     see http://groups.google.com/groups?selm=4252E932.3080801%40able.es
+    wxWindow *parent = GetParent();
+    HBRUSH hbr = (HBRUSH)parent->MSWGetBgBrush(dc.GetHDC(), GetHWND());
+
+    // if there is no special brush for painting this control, just use the
+    // solid background colour
+    wxBrush brush;
+    if ( !hbr )
+    {
+        brush = wxBrush(parent->GetBackgroundColour());
+        hbr = GetHbrushOf(brush);

     }
     }

-    ::GetWindowRect(GetHwnd(), &rc);
-    ::OffsetRgn(hrgn, -rc.left, -rc.top);

 
 

-    return hrgn;
+    ::FillRect(GetHdcOf(dc), &rc, hbr);
+}
+
+void wxStaticBox::PaintForeground(wxDC& dc, const RECT& WXUNUSED(rc))
+{
+    // NB: neither setting the text colour nor transparent background mode
+    //     doesn't change anything: the static box def window proc still
+    //     draws the label in its own colours, so if we want to have control
+    //     over this we really have to draw everything ourselves
+    MSWDefWindowProc(WM_PAINT, (WPARAM)GetHdcOf(dc), 0);

 }
 
 void wxStaticBox::OnPaint(wxPaintEvent& WXUNUSED(event))
 {
 }
 
 void wxStaticBox::OnPaint(wxPaintEvent& WXUNUSED(event))
 {

-    wxPaintDC dc(this);

     RECT rc;
     ::GetClientRect(GetHwnd(), &rc);
 
     RECT rc;
     ::GetClientRect(GetHwnd(), &rc);
 

-    // paint the actual box
+    // draw the entire box in a memory DC

     wxMemoryDC memdc;
     wxBitmap bitmap(rc.right, rc.bottom);
     memdc.SelectObject(bitmap);
 
     wxMemoryDC memdc;
     wxBitmap bitmap(rc.right, rc.bottom);
     memdc.SelectObject(bitmap);
 

-    // get bg brush
-    WXHBRUSH hbr = DoMSWControlColor(GetHdcOf(memdc), wxNullColour);
-    if ( !hbr )
-    {
-        wxBrush *brush = wxTheBrushList->FindOrCreateBrush(GetBackgroundColour(), wxSOLID);
-        hbr = (WXHBRUSH)brush->GetResourceHandle();
-    }
+    PaintBackground(memdc, rc);
+    PaintForeground(memdc, rc);

 
 

-    // draw solid box, but only blit the good bits
-    ::FillRect(GetHdcOf(memdc), &rc, (HBRUSH)hbr);
-    MSWDefWindowProc(WM_PAINT, (WPARAM)GetHdcOf(memdc), 0);
+    // now only blit the static box border itself, not the interior, to avoid
+    // flicker when background is drawn below
+    //
+    // note that it seems to be faster to do 4 small blits here and then paint
+    // directly into wxPaintDC than painting background in wxMemoryDC and then
+    // blitting everything at once to wxPaintDC, this is why we do it like this
+    wxPaintDC dc(this);
+    int borderTop, border;
+    GetBordersForSizer(&borderTop, &border);

 
     // top
 
     // top

-    dc.Blit(7, 0, rc.right - 7, 14, &memdc, 7, 0);
+    dc.Blit(border, 0, rc.right - border, borderTop,
+            &memdc, border, 0);

     // bottom
     // bottom

-    dc.Blit(7, rc.bottom - 7, rc.right - 7, rc.bottom, &memdc, 7, rc.bottom - 7);
+    dc.Blit(border, rc.bottom - border, rc.right - border, rc.bottom,
+            &memdc, border, rc.bottom - border);

     // left
     // left

-    dc.Blit(0, 0, 7, rc.bottom, &memdc, 0, 0);
+    dc.Blit(0, 0, border, rc.bottom,
+            &memdc, 0, 0);

     // right
     // right

-    dc.Blit(rc.right - 7, 0, rc.right, rc.bottom, &memdc, rc.right - 7, 0);
+    dc.Blit(rc.right - border, 0, rc.right, rc.bottom,
+            &memdc, rc.right - border, 0);

 
 

-    // paint the inner
-    HRGN hrgn = (HRGN)MSWCalculateClippingRegion();
-    // now remove the box itself
-    MSWClipBoxRegion((WXHRGN) hrgn, (const WXRECTPTR) &rc);

 
 

-    hbr = DoMSWControlColor(GetHdcOf(dc), wxNullColour);
-    if ( !hbr )
-    {
-        wxBrush *brush = wxTheBrushList->FindOrCreateBrush(GetBackgroundColour(), wxSOLID);
-        hbr = (WXHBRUSH)brush->GetResourceHandle();
-    }
+    // create the region excluding box children
+    AutoHRGN hrgn((HRGN)MSWGetRegionWithoutChildren());
+    RECT rcWin;
+    ::GetWindowRect(GetHwnd(), &rcWin);
+    ::OffsetRgn(hrgn, -rcWin.left, -rcWin.top);

 
 

-    ::SelectClipRgn(GetHdcOf(dc), hrgn);
-    ::FillRect(GetHdcOf(dc), &rc, (HBRUSH)hbr);
-    ::SelectClipRgn(GetHdcOf(dc), NULL);
-    ::DeleteObject(hrgn);
+    // and also the box itself
+    MSWGetRegionWithoutSelf((WXHRGN) hrgn, rc.right, rc.bottom);
+    HDCClipper clipToBg(GetHdcOf(dc), hrgn);
+
+    // paint the inside of the box (excluding box itself and child controls)
+    PaintBackground(dc, rc);

 }
 
 }
 

+#endif // !__WXWINCE__
+

 #endif // wxUSE_STATBOX
 
 #endif // wxUSE_STATBOX