Added ability to call wxWindow::OnPaint under Windows (experimental).

Added wxTR_NO_LINES to remove lines from tree control (MSW only).


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@7925 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/treectrl.tex

@@ -22,6 +22,10 @@ To intercept events from a tree control, use the event table macros described in
 \begin{twocollist}\itemsep=0pt
 \twocolitem{\windowstyle{wxTR\_HAS\_BUTTONS}}{Use this style to show + and - buttons to the
 left of parent items. Win32 only. }
+\twocolitem{\windowstyle{wxTR\_NO\_LINES}}{Use this style to hide vertical lines.
+Win32 only. }
+\twocolitem{\windowstyle{wxTR\_LINES\_AT\_ROOT}}{Use this style to show lines at the
+tree root. Win32 only.}
 \twocolitem{\windowstyle{wxTR\_EDIT\_LABELS}}{Use this style if you wish the user to be
 able to edit labels in the tree control.}
 \twocolitem{\windowstyle{wxTR\_MULTIPLE}}{Use this style to allow the user to

include/wx/defs.h

@@ -1087,6 +1087,7 @@ enum wxStretch
 #define wxTR_MULTIPLE        0x0020
 #define wxTR_EXTENDED        0x0040
 #define wxTR_HAS_VARIABLE_ROW_HEIGHT 0x0080
+#define wxTR_NO_LINES        0x0100
 
 /*
  * wxListCtrl flags

include/wx/msw/dcclient.h

@@ -74,6 +74,9 @@ public:
 
     virtual ~wxPaintDC();
 
+    // find the entry for this DC in the cache (keyed by the window)
+    static WXHDC FindDCInCache(wxWindow* win);
+
 protected:
     static wxArrayDCInfo ms_cache;
 

include/wx/msw/window.h

@@ -185,6 +185,7 @@ public:
     void OnSetFocus(wxFocusEvent& event);
     void OnEraseBackground(wxEraseEvent& event);
     void OnIdle(wxIdleEvent& event);
+    void OnPaint(wxPaintEvent& event);
 
 public:
     // For implementation purposes - sometimes decorations make the client area

src/msw/dcclient.cpp

@@ -262,3 +262,20 @@ wxPaintDCInfo *wxPaintDC::FindInCache(size_t *index) const
 
     return info;
 }
+
+// find the entry for this DC in the cache (keyed by the window)
+WXHDC wxPaintDC::FindDCInCache(wxWindow* win)
+{
+    wxPaintDCInfo *info = NULL;
+    size_t nCache = ms_cache.GetCount();
+    for ( size_t n = 0; n < nCache; n++ )
+    {
+        info = &ms_cache[n];
+        if ( info->hwnd == win->GetHWND() )
+        {
+            return info->hdc;
+        }
+    }
+    return 0;
+}
+

src/msw/treectrl.cpp

@@ -519,8 +519,10 @@ bool wxTreeCtrl::Create(wxWindow *parent,
         return FALSE;
 
     DWORD wstyle = WS_VISIBLE | WS_CHILD | WS_TABSTOP |
-                   TVS_HASLINES | TVS_SHOWSELALWAYS /* | WS_CLIPSIBLINGS */;
+                   TVS_SHOWSELALWAYS /* | WS_CLIPSIBLINGS */;
 
+    if ((m_windowStyle & wxTR_NO_LINES) == 0)
+        wstyle |= TVS_HASLINES;
     if ( m_windowStyle & wxTR_HAS_BUTTONS )
         wstyle |= TVS_HASBUTTONS;
 

src/msw/window.cpp

@@ -2952,6 +2952,16 @@ bool wxWindow::HandlePaint()
     return GetEventHandler()->ProcessEvent(event);
 }
 
+// Can be called from an application's OnPaint handler
+void wxWindow::OnPaint(wxPaintEvent& event)
+{
+    HDC hDC = (HDC) wxPaintDC::FindDCInCache((wxWindow*) event.GetEventObject());
+    if (hDC != 0)
+    {
+        MSWDefWindowProc(WM_PAINT, (WPARAM) hDC, 0);
+    }
+}
+
 bool wxWindow::HandleEraseBkgnd(WXHDC hdc)
 {
     // Prevents flicker when dragging