1 files changed, 121 insertions, 0 deletions
diff --git a/wx+/rtl.h b/wx+/rtl.h
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+++ b/wx+/rtl.h
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+// **************************************************************************
+// * This file is part of the FreeFileSync project. It is distributed under *
+// * GNU General Public License: http://www.gnu.org/licenses/gpl.html       *
+// * Copyright (C) ZenJu (zhnmju123 AT gmx DOT de) - All Rights Reserved    *
+// **************************************************************************
+
+#ifndef RTL_H_0183487180058718273432148
+#define RTL_H_0183487180058718273432148
+
+#include <memory>
+#include <wx/dcmemory.h>
+#include <wx/dcmirror.h>
+#include <wx/image.h>
+#include <wx/icon.h>
+#include <wx/app.h>
+
+namespace zen
+{
+//functions supporting right-to-left GUI layout
+
+void drawBitmapRtlMirror(wxDC& dc,
+                         const wxBitmap& image,
+                         const wxRect& rect,
+                         int alignment,
+                         std::unique_ptr<wxBitmap>& buffer); //mirror image if layout is RTL + fix some strange wxDC::Blit bug on RTL
+
+void drawBitmapRtlNoMirror(wxDC& dc,  //wxDC::DrawLabel does already NOT mirror by default (but does a crappy job at it, surprise)
+                           const wxBitmap& image,
+                           const wxRect& rect,
+                           int alignment,
+                           std::unique_ptr<wxBitmap>& buffer);
+
+void drawIconRtlNoMirror(wxDC& dc,
+                         const wxIcon& icon, //wxDC::DrawIcon DOES mirror by default
+                         const wxPoint& pt,
+                         std::unique_ptr<wxBitmap>& buffer);
+
+wxBitmap mirrorIfRtl(const wxBitmap& bmp);
+
+
+
+
+
+
+
+
+
+
+
+//---------------------- implementation ------------------------
+namespace
+{
+template <class DrawImageFun>
+void drawRtlImpl(wxDC& dc, const wxRect& rect, std::unique_ptr<wxBitmap>& buffer, bool doMirror, DrawImageFun draw)
+{
+    if (dc.GetLayoutDirection() == wxLayout_RightToLeft)
+    {
+        if (!buffer || buffer->GetWidth() != rect.width || buffer->GetHeight() < rect.height) //[!] since we do a mirror, width needs to match exactly!
+            buffer.reset(new wxBitmap(rect.width, rect.height));
+
+        wxMemoryDC memDc(*buffer);
+        memDc.Blit(wxPoint(0, 0), rect.GetSize(), &dc, rect.GetTopLeft()); //blit in: background is mirrored due to memDc, dc having different layout direction!
+
+        if (!doMirror)
+        {
+            *buffer = wxBitmap(buffer->ConvertToImage().Mirror());
+            memDc.SelectObject(*buffer);
+        }
+
+        draw(memDc, wxRect(0, 0, rect.width, rect.height));
+        //note: we cannot simply use memDc.SetLayoutDirection(wxLayout_RightToLeft) due to some strange 1 pixel bug! so it's a quadruple mirror! :>
+
+        if (!doMirror)
+        {
+            *buffer = wxBitmap(buffer->ConvertToImage().Mirror());
+            memDc.SelectObject(*buffer);
+        }
+
+        dc.Blit(rect.GetTopLeft(), rect.GetSize(), &memDc, wxPoint(0, 0)); //blit out: mirror once again
+    }
+    else
+        draw(dc, rect);
+}
+}
+
+
+inline
+void drawBitmapRtlMirror(wxDC& dc, const wxBitmap& image, const wxRect& rect, int alignment, std::unique_ptr<wxBitmap>& buffer)
+{
+    return drawRtlImpl(dc, rect, buffer, true, [&](wxDC& dc2, const wxRect& rect2) { dc2.DrawLabel(wxString(), image, rect2, alignment); });
+}
+
+inline
+void drawBitmapRtlNoMirror(wxDC& dc, const wxBitmap& image, const wxRect& rect, int alignment, std::unique_ptr<wxBitmap>& buffer)
+{
+    if (dc.GetLayoutDirection() == wxLayout_RightToLeft)
+        if ((alignment & wxALIGN_CENTER_HORIZONTAL) == 0) //we still *do* want to mirror alignment!
+            alignment ^= wxALIGN_RIGHT;
+    static_assert(wxALIGN_LEFT == 0, "doh");
+    return drawRtlImpl(dc, rect, buffer, false, [&](wxDC& dc2, const wxRect& rect2) { dc2.DrawLabel(wxString(), image, rect2, alignment); });
+}
+
+inline
+void drawIconRtlNoMirror(wxDC& dc, const wxIcon& icon, const wxPoint& pt, std::unique_ptr<wxBitmap>& buffer)
+{
+    wxRect rect(pt.x, pt.y, icon.GetWidth(), icon.GetHeight());
+    return drawRtlImpl(dc, rect, buffer, false, [&](wxDC& dc2, const wxRect& rect2) { dc2.DrawIcon(icon, rect2.GetTopLeft()); });
+}
+
+
+inline
+wxBitmap mirrorIfRtl(const wxBitmap& bmp)
+{
+    if (wxTheApp->GetLayoutDirection() == wxLayout_RightToLeft)
+        return bmp.ConvertToImage().Mirror();
+    else
+        return bmp;
+}
+}
+
+#endif //RTL_H_0183487180058718273432148