extract (and expand and clean up and document) the header window implementation used inside the generic wxDataViewCtrl in a separate wxHeaderCtrl class which could be reused in (generic) wxListCtrl and, most importantly, wxGrid later

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@57093 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/headerctrl.cpp

@@ -0,0 +1,185 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        src/msw/headerctrl.cpp
+// Purpose:     implementation of wxHeaderCtrl for wxMSW
+// Author:      Vadim Zeitlin
+// Created:     2008-12-01
+// RCS-ID:      $Id$
+// Copyright:   (c) 2008 Vadim Zeitlin <vadim@wxwidgets.org>
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+// ============================================================================
+// declarations
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
+// for compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
+
+#ifdef __BORLANDC__
+    #pragma hdrstop
+#endif
+
+#ifndef WX_PRECOMP
+#endif // WX_PRECOMP
+
+#include "wx/headerctrl.h"
+#include "wx/imaglist.h"
+
+#include "wx/msw/wrapcctl.h"
+
+// ============================================================================
+// wxHeaderCtrl implementation
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// wxHeaderCtrl construction/destruction
+// ----------------------------------------------------------------------------
+
+void wxHeaderCtrl::Init()
+{
+    m_imageList = NULL;
+}
+
+bool wxHeaderCtrl::Create(wxWindow *parent,
+                          wxWindowID id,
+                          const wxPoint& pos,
+                          const wxSize& size,
+                          long style,
+                          const wxString& name)
+{
+    // notice that we don't need InitCommonControlsEx(ICC_LISTVIEW_CLASSES)
+    // here as we already call InitCommonControls() in wxApp initialization
+    // code which covers this
+
+    if ( !CreateControl(parent, id, pos, size, style, wxDefaultValidator, name) )
+        return false;
+
+    if ( !MSWCreateControl(WC_HEADER, _T(""), pos, size) )
+        return false;
+
+    return true;
+}
+
+WXDWORD wxHeaderCtrl::MSWGetStyle(long style, WXDWORD *exstyle) const
+{
+    WXDWORD msStyle = wxControl::MSWGetStyle(style, exstyle);
+
+    if ( style & wxHD_DRAGDROP )
+        msStyle |= HDS_DRAGDROP;
+
+    // the control looks nicer with these styles and there doesn't seem to be
+    // any reason to not use them so we always do (as for HDS_HORZ it is 0
+    // anyhow but include it for clarity)
+    msStyle |= HDS_HORZ | HDS_BUTTONS | HDS_FLAT | HDS_FULLDRAG | HDS_HOTTRACK;
+
+    return msStyle;
+}
+
+wxHeaderCtrl::~wxHeaderCtrl()
+{
+    delete m_imageList;
+}
+
+// ----------------------------------------------------------------------------
+// wxHeaderCtrl geometry calculation
+// ----------------------------------------------------------------------------
+
+wxSize wxHeaderCtrl::DoGetBestSize() const
+{
+    RECT rc = wxGetClientRect(GetHwndOf(GetParent()));
+    WINDOWPOS wpos;
+    HDLAYOUT layout = { &rc, &wpos };
+    if ( !Header_Layout(GetHwnd(), &layout) )
+    {
+        wxLogLastError(_T("Header_Layout"));
+        return wxControl::DoGetBestSize();
+    }
+
+    return wxSize(wpos.cx, wpos.cy);
+}
+
+// ----------------------------------------------------------------------------
+// wxHeaderCtrl columns managements
+// ----------------------------------------------------------------------------
+
+unsigned int wxHeaderCtrl::DoGetCount() const
+{
+    return Header_GetItemCount(GetHwnd());
+}
+
+void wxHeaderCtrl::DoInsert(const wxHeaderColumn& col, unsigned int idx)
+{
+    // copy the HDITEM because we may modify it below
+    HDITEM hdi = col.GetHDI();
+
+    const wxBitmap bmp = col.GetBitmap();
+    if ( bmp.IsOk() )
+    {
+        const int bmpWidth = bmp.GetWidth(),
+                  bmpHeight = bmp.GetHeight();
+
+        if ( !m_imageList )
+        {
+            m_imageList = new wxImageList(bmpWidth, bmpHeight);
+            Header_SetImageList(GetHwnd(), GetHimagelistOf(m_imageList));
+        }
+        else // already have an image list
+        {
+            // check that all bitmaps we use have the same size
+            int imageWidth,
+                imageHeight;
+            m_imageList->GetSize(0, imageWidth, imageHeight);
+
+            wxASSERT_MSG( imageWidth == bmpWidth && imageHeight == bmpHeight,
+                          "all column bitmaps must have the same size" );
+        }
+
+        m_imageList->Add(bmp);
+        hdi.mask |= HDI_IMAGE;
+        hdi.iImage = m_imageList->GetImageCount() - 1;
+    }
+
+    if ( Header_InsertItem(GetHwnd(), idx, &hdi) == -1 )
+    {
+        wxLogLastError(_T("Header_InsertItem"));
+    }
+}
+
+void wxHeaderCtrl::DoDelete(unsigned int idx)
+{
+    if ( !Header_DeleteItem(GetHwnd(), idx) )
+    {
+        wxLogLastError(_T("Header_DeleteItem"));
+    }
+}
+
+// ----------------------------------------------------------------------------
+// wxHeaderCtrl columns attributes
+// ----------------------------------------------------------------------------
+
+void wxHeaderCtrl::DoShowSortIndicator(unsigned int idx, int sortOrder)
+{
+    wxHDITEM hdi;
+    hdi.mask = HDI_FORMAT;
+
+    if ( !Header_GetItem(GetHwnd(), idx, &hdi) )
+    {
+        wxLogLastError(_T("Header_GetItem"));
+        return;
+    }
+
+    if ( sortOrder == -1 )
+        hdi.fmt &= ~(HDF_SORTDOWN | HDF_SORTUP);
+    else
+        hdi.fmt |= sortOrder ? HDF_SORTUP : HDF_SORTDOWN;
+
+    if ( !Header_SetItem(GetHwnd(), idx, &hdi) )
+    {
+        wxLogLastError(_T("Header_SetItem"));
+    }
+}
+