generic implementation of wxHeaderCtrl API so far

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@57136 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/headerctrlg.cpp

@@ -30,8 +30,249 @@
 
 #ifdef wxHAS_GENERIC_HEADERCTRL
 
+#include "wx/dcbuffer.h"
+#include "wx/renderer.h"
+
+// ----------------------------------------------------------------------------
+// constants
+// ----------------------------------------------------------------------------
+
+namespace
+{
+
+const unsigned NO_SORT = (unsigned)-1;
+
+const unsigned COL_NONE = (unsigned)-1;
+
+} // anonymous namespace
+
 // ============================================================================
-// implementation
+// wxHeaderCtrl implementation
 // ============================================================================
 
+// ----------------------------------------------------------------------------
+// wxHeaderCtrl creation
+// ----------------------------------------------------------------------------
+
+void wxHeaderCtrl::Init()
+{
+    m_hover = COL_NONE;
+    m_scrollOffset = 0;
+}
+
+bool wxHeaderCtrl::Create(wxWindow *parent,
+                          wxWindowID id,
+                          const wxPoint& pos,
+                          const wxSize& size,
+                          long style,
+                          const wxString& name)
+{
+    if ( !wxHeaderCtrlBase::Create(parent, id, pos, size,
+                                   style, wxDefaultValidator, name) )
+        return false;
+
+    // tell the system to not paint the background at all to avoid flicker as
+    // we paint the entire window area in our OnPaint()
+    SetBackgroundStyle(wxBG_STYLE_CUSTOM);
+
+    return true;
+}
+
+wxHeaderCtrl::~wxHeaderCtrl()
+{
+}
+
+// ----------------------------------------------------------------------------
+// wxHeaderCtrl columns manipulation
+// ----------------------------------------------------------------------------
+
+unsigned int wxHeaderCtrl::DoGetCount() const
+{
+    return m_cols.size();
+}
+
+void wxHeaderCtrl::DoInsert(const wxHeaderColumn& col, unsigned int idx)
+{
+    m_cols.insert(m_cols.begin() + idx, col);
+    m_sortOrders.insert(m_sortOrders.begin() + idx, -1);
+
+    if ( m_cols[idx].IsShown() )
+        RefreshColsAfter(idx);
+}
+
+void wxHeaderCtrl::DoDelete(unsigned int idx)
+{
+    m_cols.erase(m_cols.begin() + idx);
+    m_sortOrders.erase(m_sortOrders.begin() + idx);
+
+    RefreshColsAfter(idx);
+}
+
+void wxHeaderCtrl::DoShowColumn(unsigned int idx, bool show)
+{
+    if ( show != m_cols[idx].IsShown() )
+    {
+        m_cols[idx].SetHidden(!show);
+
+        RefreshColsAfter(idx);
+    }
+}
+
+void wxHeaderCtrl::DoShowSortIndicator(unsigned int idx, int sortOrder)
+{
+    if ( sortOrder != m_sortOrders[idx] )
+    {
+        m_sortOrders[idx] = sortOrder;
+
+        RefreshCol(idx);
+    }
+}
+
+// ----------------------------------------------------------------------------
+// wxHeaderCtrl scrolling
+// ----------------------------------------------------------------------------
+
+void wxHeaderCtrl::DoScrollHorz(int dx)
+{
+    m_scrollOffset += dx;
+
+    // don't call our own version which calls this function!
+    wxControl::ScrollWindow(dx, 0);
+}
+
+// ----------------------------------------------------------------------------
+// wxHeaderCtrl geometry
+// ----------------------------------------------------------------------------
+
+wxSize wxHeaderCtrl::DoGetBestSize() const
+{
+    // the vertical size is rather arbitrary but it looks better if we leave
+    // some space around the text
+    return wxSize(GetColStart(GetColumnCount()), (7*GetCharHeight())/4);
+}
+
+int wxHeaderCtrl::GetColStart(unsigned int idx) const
+{
+    int pos = 0;
+    for ( unsigned n = 0; n < idx; n++ )
+    {
+        const wxHeaderColumn& col = m_cols[n];
+        if ( col.IsShown() )
+            pos += col.GetWidth();
+    }
+
+    return pos;
+}
+
+// ----------------------------------------------------------------------------
+// wxHeaderCtrl repainting
+// ----------------------------------------------------------------------------
+
+void wxHeaderCtrl::RefreshCol(unsigned int idx)
+{
+    wxRect rect = GetClientRect();
+    rect.x += GetColStart(idx);
+    rect.width = m_cols[idx].GetWidth();
+
+    RefreshRect(rect);
+}
+
+void wxHeaderCtrl::RefreshColsAfter(unsigned int idx)
+{
+    wxRect rect = GetClientRect();
+    const int ofs = GetColStart(idx);
+    rect.x += ofs;
+    rect.width -= ofs;
+
+    RefreshRect(rect);
+}
+
+// ----------------------------------------------------------------------------
+// wxHeaderCtrl event handlers
+// ----------------------------------------------------------------------------
+
+BEGIN_EVENT_TABLE(wxHeaderCtrl, wxControl)
+    EVT_PAINT(wxHeaderCtrl::OnPaint)
+
+    EVT_MOUSE_EVENTS(wxHeaderCtrl::OnMouse)
+END_EVENT_TABLE()
+
+void wxHeaderCtrl::OnPaint(wxPaintEvent& WXUNUSED(event))
+{
+    int w, h;
+    GetClientSize(&w, &h);
+
+    wxAutoBufferedPaintDC dc(this);
+
+    dc.SetBackground(GetBackgroundColour());
+    dc.Clear();
+
+    // account for the horizontal scrollbar offset in the parent window
+    dc.SetDeviceOrigin(m_scrollOffset, 0);
+
+    const unsigned int count = m_cols.size();
+    int xpos = 0;
+    for ( unsigned int i = 0; i < count; i++ )
+    {
+        const wxHeaderColumn& col = m_cols[i];
+        if ( col.IsHidden() )
+            continue;
+
+        const int colWidth = col.GetWidth();
+
+        wxHeaderSortIconType sortArrow;
+        switch ( m_sortOrders[i] )
+        {
+            default:
+                wxFAIL_MSG( "wrong sort order value" );
+                // fall through
+
+            case -1:
+                sortArrow = wxHDR_SORT_ICON_NONE;
+                break;
+
+            case 0:
+                sortArrow = wxHDR_SORT_ICON_DOWN;
+                break;
+
+            case 1:
+                sortArrow = wxHDR_SORT_ICON_UP;
+                break;
+        }
+
+        int state = 0;
+        if ( IsEnabled() )
+        {
+            if ( i == m_hover )
+                state = wxCONTROL_CURRENT;
+        }
+        else // disabled
+        {
+            state = wxCONTROL_DISABLED;
+        }
+
+        wxHeaderButtonParams params;
+        params.m_labelText = col.GetTitle();
+        params.m_labelBitmap = col.GetBitmap();
+        params.m_labelAlignment = col.GetAlignment();
+
+        wxRendererNative::Get().DrawHeaderButton
+                                (
+                                    this,
+                                    dc,
+                                    wxRect(xpos, 0, colWidth, h),
+                                    state,
+                                    sortArrow,
+                                    &params
+                                );
+
+        xpos += colWidth;
+    }
+}
+
+void wxHeaderCtrl::OnMouse(wxMouseEvent& event)
+{
+    event.Skip();
+}
+
 #endif // wxHAS_GENERIC_HEADERCTRL