add upstream 10.19

14 files changed, 146 insertions, 158 deletions

diff --git a/wx+/bitmap_button.h b/wx+/bitmap_button.h
index bcbc7328..b40d8dd3 100644
--- a/wx+/bitmap_button.h
+++ b/wx+/bitmap_button.h
@@ -56,13 +56,13 @@ void setBitmapTextLabel(wxBitmapButton& btn, const wxImage& img, const wxString&
     wxImage dynImage = createImageFromText(text, btn.GetFont(), btn.GetForegroundColour());
     if (img.IsOk())
         dynImage = btn.GetLayoutDirection() != wxLayout_RightToLeft ?
-                   stackImages(img, dynImage, ImageStackLayout::HORIZONTAL, ImageStackAlignment::CENTER, gap) :
-                   stackImages(dynImage, img, ImageStackLayout::HORIZONTAL, ImageStackAlignment::CENTER, gap);
+                   stackImages(img, dynImage, ImageStackLayout::horizontal, ImageStackAlignment::center, gap) :
+                   stackImages(dynImage, img, ImageStackLayout::horizontal, ImageStackAlignment::center, gap);
 
-    //SetMinSize() instead of SetSize() is needed here for wxWindows layout determination to work corretly
+    //SetMinSize() instead of SetSize() is needed here for wxWindows layout determination to work correctly
     const int defaultHeight = wxButton::GetDefaultSize().GetHeight();
-    btn.SetMinSize(wxSize(dynImage.GetWidth () + 2 * border,
-                          std::max(dynImage.GetHeight() + 2 * border, defaultHeight)));
+    btn.SetMinSize({dynImage.GetWidth () + 2 * border,
+                    std::max(dynImage.GetHeight() + 2 * border, defaultHeight)});
 
     btn.SetBitmapLabel(wxBitmap(dynImage));
     //SetLabel() calls confuse wxBitmapButton in the disabled state and it won't show the image! workaround:
@@ -73,7 +73,7 @@ void setBitmapTextLabel(wxBitmapButton& btn, const wxImage& img, const wxString&
 inline
 void setImage(wxBitmapButton& button, const wxBitmap& bmp)
 {
-    if (!isEqual(button.GetBitmapLabel(), bmp))
+    if (!button.GetBitmapLabel().IsSameAs(bmp))
     {
         button.SetBitmapLabel(bmp);
 
diff --git a/wx+/file_drop.h b/wx+/file_drop.h
index ee5393b7..9826bf27 100644
--- a/wx+/file_drop.h
+++ b/wx+/file_drop.h
@@ -60,8 +60,6 @@ using FileDropEventFunction = void (wxEvtHandler::*)(FileDropEvent&);
 
 
 void setupFileDrop(wxWindow& wnd);
-
-
 }
 
 #endif //FILE_DROP_H_09457802957842560325626
diff --git a/wx+/graph.cpp b/wx+/graph.cpp
index a6d0f19d..ec338e99 100644
--- a/wx+/graph.cpp
+++ b/wx+/graph.cpp
@@ -226,11 +226,11 @@ void drawCornerText(wxDC& dc, const wxRect& graphArea, const wxString& txt, Grap
             break;
     }
 
-        //add text shadow to improve readability:
-	wxDCTextColourChanger textColor(dc, colorBack);
-     dc.DrawText(txt, drawPos + border + wxSize(fastFromDIP(1), fastFromDIP(1)));
+    //add text shadow to improve readability:
+    wxDCTextColourChanger textColor(dc, colorBack);
+    dc.DrawText(txt, drawPos + border + wxSize(fastFromDIP(1), fastFromDIP(1)));
 
-	textColor.Set(colorText);
+    textColor.Set(colorText);
     dc.DrawText(txt, drawPos + border);
 }
 
diff --git a/wx+/grid.cpp b/wx+/grid.cpp
index 0613e14f..fe168df6 100644
--- a/wx+/grid.cpp
+++ b/wx+/grid.cpp
@@ -35,7 +35,7 @@ int GridData::getColumnGapLeft() { return fastFromDIP(4); }
 namespace
 {
 //------------------------------ Grid Parameters --------------------------------
-inline wxColor getColorLabelText() { return wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT); }
+inline wxColor getColorLabelText(bool enabled) { return wxSystemSettings::GetColour(enabled ? wxSYS_COLOUR_WINDOWTEXT : wxSYS_COLOUR_GRAYTEXT); }
 inline wxColor getColorGridLine() { return { 192, 192, 192 }; } //light grey
 
 inline wxColor getColorLabelGradientFrom() { return wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW); }
@@ -213,13 +213,13 @@ wxSize GridData::drawCellText(wxDC& dc, const wxRect& rect, const std::wstring&
 }
 
 
-void GridData::renderColumnLabel(Grid& grid, wxDC& dc, const wxRect& rect, ColumnType colType, bool highlighted)
+void GridData::renderColumnLabel(wxDC& dc, const wxRect& rect, ColumnType colType, bool enabled, bool highlighted)
 {
     wxRect rectRemain = drawColumnLabelBackground(dc, rect, highlighted);
 
     rectRemain.x     += getColumnGapLeft();
     rectRemain.width -= getColumnGapLeft();
-    drawColumnLabelText(dc, rectRemain, getColumnLabel(colType));
+    drawColumnLabelText(dc, rectRemain, getColumnLabel(colType), enabled);
 }
 
 
@@ -247,9 +247,9 @@ wxRect GridData::drawColumnLabelBackground(wxDC& dc, const wxRect& rect, bool hi
 }
 
 
-void GridData::drawColumnLabelText(wxDC& dc, const wxRect& rect, const std::wstring& text)
+void GridData::drawColumnLabelText(wxDC& dc, const wxRect& rect, const std::wstring& text, bool enabled)
 {
-    wxDCTextColourChanger textColor(dc, getColorLabelText()); //accessibility: always set both foreground AND background colors!
+    wxDCTextColourChanger textColor(dc, getColorLabelText(enabled)); //accessibility: always set both foreground AND background colors!
     drawCellText(dc, rect, text, wxALIGN_LEFT | wxALIGN_CENTER_VERTICAL);
 }
 
@@ -500,7 +500,8 @@ private:
 
     void render(wxDC& dc, const wxRect& rect) override
     {
-        clearArea(dc, rect, wxSystemSettings::GetColour(/*!renderAsEnabled(*this) ? wxSYS_COLOUR_BTNFACE :*/wxSYS_COLOUR_WINDOW));
+        const bool enabled = renderAsEnabled(*this);
+        clearArea(dc, rect, wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 
         dc.SetFont(GetFont()); //harmonize with RowLabelWin::getBestWidth()!
 
@@ -511,16 +512,16 @@ private:
             if (singleLabelArea.height > 0)
             {
                 singleLabelArea.y = refParent().CalcScrolledPosition(singleLabelArea.GetTopLeft()).y;
-                drawRowLabel(dc, singleLabelArea, row);
+                drawRowLabel(dc, singleLabelArea, row, enabled);
             }
         }
     }
 
-    void drawRowLabel(wxDC& dc, const wxRect& rect, size_t row)
+    void drawRowLabel(wxDC& dc, const wxRect& rect, size_t row, bool enabled)
     {
         //clearArea(dc, rect, getColorRowLabel());
         dc.GradientFillLinear(rect, getColorLabelGradientFrom(), getColorLabelGradientTo(), wxEAST); //clear overlapping cells
-        wxDCTextColourChanger textColor(dc, getColorLabelText()); //accessibility: always set both foreground AND background colors!
+        wxDCTextColourChanger textColor(dc, getColorLabelText(enabled)); //accessibility: always set both foreground AND background colors!
 
         //label text
         wxRect textRect = rect;
@@ -615,7 +616,8 @@ private:
 
     void render(wxDC& dc, const wxRect& rect) override
     {
-        clearArea(dc, rect, wxSystemSettings::GetColour(/*!renderAsEnabled(*this) ? wxSYS_COLOUR_BTNFACE :*/wxSYS_COLOUR_WINDOW));
+        const bool enabled = renderAsEnabled(*this);
+        clearArea(dc, rect, wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 
         //coordinate with "colLabelHeight" in Grid constructor:
         wxFont labelFont = GetFont();
@@ -637,7 +639,7 @@ private:
             if (labelAreaTL.x > rect.GetRight())
                 return; //done, rect is fully covered
             if (labelAreaTL.x + width > rect.x)
-                drawColumnLabel(dc, wxRect(labelAreaTL, wxSize(width, colLabelHeight)), col, it->type);
+                drawColumnLabel(dc, wxRect(labelAreaTL, wxSize(width, colLabelHeight)), col, it->type, enabled);
             labelAreaTL.x += width;
         }
         if (labelAreaTL.x > rect.GetRight())
@@ -652,11 +654,11 @@ private:
             const int clientWidth = GetClientSize().GetWidth(); //need reliable, stable width in contrast to rect.width
 
             if (totalWidth < clientWidth)
-                drawColumnLabel(dc, wxRect(labelAreaTL, wxSize(clientWidth - totalWidth, colLabelHeight)), absWidths.size(), ColumnType::NONE);
+                drawColumnLabel(dc, wxRect(labelAreaTL, wxSize(clientWidth - totalWidth, colLabelHeight)), absWidths.size(), ColumnType::NONE, enabled);
         }
     }
 
-    void drawColumnLabel(wxDC& dc, const wxRect& rect, size_t col, ColumnType colType)
+    void drawColumnLabel(wxDC& dc, const wxRect& rect, size_t col, ColumnType colType, bool enabled)
     {
         if (auto dataView = refParent().getDataProvider())
         {
@@ -666,7 +668,7 @@ private:
                                        false;
 
             RecursiveDcClipper clip(dc, rect);
-            dataView->renderColumnLabel(refParent(), dc, rect, colType, isHighlighted);
+            dataView->renderColumnLabel(dc, rect, colType, enabled, isHighlighted);
 
             //draw move target location
             if (refParent().allowColumnMove_)
@@ -885,7 +887,8 @@ public:
 private:
     void render(wxDC& dc, const wxRect& rect) override
     {
-        clearArea(dc, rect, wxSystemSettings::GetColour(/*!renderAsEnabled(*this) ? wxSYS_COLOUR_BTNFACE :*/wxSYS_COLOUR_WINDOW));
+        const bool enabled = renderAsEnabled(*this);
+        clearArea(dc, rect, wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 
         dc.SetFont(GetFont()); //harmonize with Grid::getBestColumnSize()
 
@@ -914,7 +917,7 @@ private:
                 {
                     const wxRect rowRect(cellAreaTL + wxPoint(0, row * rowHeight), wxSize(totalRowWidth, rowHeight));
                     RecursiveDcClipper dummy3(dc, rowRect);
-                    prov->renderRowBackgound(dc, rowRect, row, renderAsEnabled(*this), drawAsSelected(row));
+                    prov->renderRowBackgound(dc, rowRect, row, enabled, drawAsSelected(row));
                 }
 
                 //draw single cells, column by column
@@ -928,7 +931,7 @@ private:
                         {
                             const wxRect cellRect(cellAreaTL.x, cellAreaTL.y + row * rowHeight, cw.width, rowHeight);
                             RecursiveDcClipper dummy3(dc, cellRect);
-                            prov->renderCell(dc, cellRect, row, cw.type, renderAsEnabled(*this), drawAsSelected(row), getRowHoverToDraw(row));
+                            prov->renderCell(dc, cellRect, row, cw.type, enabled, drawAsSelected(row), getRowHoverToDraw(row));
                         }
                     cellAreaTL.x += cw.width;
                 }
@@ -1488,10 +1491,10 @@ wxSize Grid::GetSizeAvailableForScrollTarget(const wxSize& size)
 
     //2. try(!) to determine scrollbar sizes:
 #if GTK_MAJOR_VERSION == 2
-	/* Ubuntu 19.10: "scrollbar-spacing" has a default value of 3: https://developer.gnome.org/gtk2/stable/GtkScrolledWindow.html#GtkScrolledWindow--s-scrollbar-spacing
-		=> the default Ubuntu theme (but also our Gtk2Styles.rc) set it to 0, but still the first call to gtk_widget_style_get() returns 3: why?
-		=> maybe styles are applied asynchronously? GetClientSize() is affected by this, so can't use!
-		=> always ignore spacing to get consistent scrollbar dimensions!  */
+    /* Ubuntu 19.10: "scrollbar-spacing" has a default value of 3: https://developer.gnome.org/gtk2/stable/GtkScrolledWindow.html#GtkScrolledWindow--s-scrollbar-spacing
+        => the default Ubuntu theme (but also our Gtk2Styles.rc) set it to 0, but still the first call to gtk_widget_style_get() returns 3: why?
+        => maybe styles are applied asynchronously? GetClientSize() is affected by this, so can't use!
+        => always ignore spacing to get consistent scrollbar dimensions!  */
     GtkScrolledWindow* scrollWin = GTK_SCROLLED_WINDOW(wxWindow::m_widget);
     assert(scrollWin);
     GtkWidget* rangeH = ::gtk_scrolled_window_get_hscrollbar(scrollWin);
@@ -1509,9 +1512,9 @@ wxSize Grid::GetSizeAvailableForScrollTarget(const wxSize& size)
     assert(scrollBarWidthV_  == 0 || scrollBarWidthV_  == scrollBarSizeTmp.x);
 
 #elif GTK_MAJOR_VERSION == 3
-		//scrollbar size increases dynamically on mouse-hover! 
-		//see "overlay scrolling": https://developer.gnome.org/gtk3/stable/GtkScrolledWindow.html#gtk-scrolled-window-set-overlay-scrolling
-		//luckily "scrollbar-spacing" is stable on GTK3
+    //scrollbar size increases dynamically on mouse-hover!
+    //see "overlay scrolling": https://developer.gnome.org/gtk3/stable/GtkScrolledWindow.html#gtk-scrolled-window-set-overlay-scrolling
+    //luckily "scrollbar-spacing" is stable on GTK3
     const wxSize scrollBarSizeTmp = GetSize() - GetClientSize();
 
     assert(scrollBarSizeTmp.x == 0 || scrollBarSizeTmp.x == 6 || scrollBarSizeTmp.x == 13); //lame hard-coded numbers (from Ubuntu 19.10)
@@ -1522,7 +1525,7 @@ wxSize Grid::GetSizeAvailableForScrollTarget(const wxSize& size)
     scrollBarHeightH_ = std::max(scrollBarHeightH_, scrollBarSizeTmp.y);
     scrollBarWidthV_  = std::max(scrollBarWidthV_,  scrollBarSizeTmp.x);
     //this function is called again by wxScrollHelper::AdjustScrollbars() if SB_SHOW_ALWAYS-scrollbars are not yet shown => scrollbar size > 0 eventually!
-	   
+
     //-----------------------------------------------------------------------------
     //harmonize with Grid::updateWindowSizes()!
     wxSize sizeAvail = size - wxSize(rowLabelWidth, colLabelHeight_);
@@ -1904,7 +1907,7 @@ void Grid::showScrollBars(Grid::ScrollBarStatus horizontal, Grid::ScrollBarStatu
         assert(false);
         return GTK_POLICY_AUTOMATIC;
     };
-	 
+
     GtkScrolledWindow* scrollWin = GTK_SCROLLED_WINDOW(wxWindow::m_widget);
     assert(scrollWin);
     ::gtk_scrolled_window_set_policy(scrollWin,
diff --git a/wx+/grid.h b/wx+/grid.h
index 74dc25b2..662c4fc1 100644
--- a/wx+/grid.h
+++ b/wx+/grid.h
@@ -115,7 +115,7 @@ public:
 
     //label area:
     virtual std::wstring getColumnLabel(ColumnType colType) const = 0;
-    virtual void renderColumnLabel(Grid& grid, wxDC& dc, const wxRect& rect, ColumnType colType, bool highlighted); //default implementation
+    virtual void renderColumnLabel(wxDC& dc, const wxRect& rect, ColumnType colType, bool enabled, bool highlighted); //default implementation
     virtual std::wstring getToolTip(ColumnType colType) const { return std::wstring(); }
 
     static int getColumnGapLeft(); //for left-aligned text
@@ -128,7 +128,7 @@ public:
     static void   drawCellBackground(wxDC& dc, const wxRect& rect, bool enabled, bool selected, const wxColor& backgroundColor);
 
     static wxRect drawColumnLabelBackground(wxDC& dc, const wxRect& rect, bool highlighted); //returns inner rectangle
-    static void   drawColumnLabelText      (wxDC& dc, const wxRect& rect, const std::wstring& text);
+    static void   drawColumnLabelText      (wxDC& dc, const wxRect& rect, const std::wstring& text, bool enabled);
 };
 
 
diff --git a/wx+/image_resources.cpp b/wx+/image_resources.cpp
index 91189ba6..2a3b7039 100644
--- a/wx+/image_resources.cpp
+++ b/wx+/image_resources.cpp
@@ -12,6 +12,7 @@
 #include <zen/perf.h>
 #include <zen/thread.h>
 #include <zen/file_io.h>
+#include <zen/file_traverser.h>
 #include <wx/zipstrm.h>
 #include <wx/mstream.h>
 #include <wx/image.h>
@@ -182,63 +183,81 @@ private:
 };
 
 
-void GlobalBitmaps::init(const Zstring& filePath)
+void GlobalBitmaps::init(const Zstring& zipPath)
 {
     assert(bitmaps_.empty() && anims_.empty());
 
-    //wxFFileInputStream/wxZipInputStream loads in junks of 512 bytes => WTF!!! => implement sane file loading:
-    try
+    std::vector<std::pair<Zstring /*file name*/, std::string /*byte stream*/>> streams;
+
+    try //to load from ZIP first:
+    {
+        //wxFFileInputStream/wxZipInputStream loads in junks of 512 bytes => WTF!!! => implement sane file loading:
+        const std::string rawStream = loadBinContainer<std::string>(zipPath, nullptr /*notifyUnbufferedIO*/); //throw FileError
+        wxMemoryInputStream memStream(rawStream.c_str(), rawStream.size()); //does not take ownership
+        wxZipInputStream zipStream(memStream, wxConvUTF8);
+        //do NOT rely on wxConvLocal! On failure shows unhelpful popup "Cannot convert from the charset 'Unknown encoding (-1)'!"
+
+        while (const auto& entry = std::unique_ptr<wxZipEntry>(zipStream.GetNextEntry())) //take ownership!
+            if (std::string stream(entry->GetSize(), '\0'); !stream.empty() && zipStream.ReadAll(&stream[0], stream.size()))
+                streams.emplace_back(utfTo<Zstring>(entry->GetName()), std::move(stream));
+            else
+                assert(false);
+    }
+    catch (FileError&) //fall back to folder
+    {
+        traverseFolder(beforeLast(zipPath, Zstr(".zip"), IF_MISSING_RETURN_NONE), [&](const FileInfo& fi)
+        {
+            if (endsWith(fi.fullPath, Zstr(".png")))
+                try
+                {
+                    std::string stream = loadBinContainer<std::string>(fi.fullPath, nullptr /*notifyUnbufferedIO*/); //throw FileError
+                    streams.emplace_back(fi.itemName, std::move(stream));
+                }
+                catch (FileError&) { assert(false); }
+        }, nullptr, nullptr, [](const std::wstring& errorMsg) { assert(false); }); //errors are not really critical in this context
+    }
+    //--------------------------------------------------------------------
+
+    //activate support for .png files
+    wxImage::AddHandler(new wxPNGHandler); //ownership passed
+
+    //do we need xBRZ scaling for high quality DPI images?
+    const int hqScale = std::clamp<int>(std::ceil(fastFromDIP(1000) / 1000.0), 1, xbrz::SCALE_FACTOR_MAX);
+    //even for 125% DPI scaling, "2xBRZ + bilinear downscale" gives a better result than mere "125% bilinear upscale"!
+    if (hqScale > 1)
+        dpiScaler_ = std::make_unique<DpiParallelScaler>(hqScale);
+
+    for (const auto& [fileName, stream] : streams)
     {
-        const std::string rawStream = loadBinContainer<std::string>(filePath, nullptr /*notifyUnbufferedIO*/); //throw FileError
-		wxMemoryInputStream memStream(rawStream.c_str(), rawStream.size()); //does not take ownership
-		wxZipInputStream zipStream(memStream, wxConvUTF8);
-		//do NOT rely on wxConvLocal! On failure shows unhelpful popup "Cannot convert from the charset 'Unknown encoding (-1)'!"
-
-		//activate support for .png files
-		wxImage::AddHandler(new wxPNGHandler); //ownership passed
-
-		//do we need xBRZ scaling for high quality DPI images?
-		const int hqScale = std::clamp<int>(std::ceil(fastFromDIP(1000) / 1000.0), 1, xbrz::SCALE_FACTOR_MAX);
-		//even for 125% DPI scaling, "2xBRZ + bilinear downscale" gives a better result than mere "125% bilinear upscale"!
-		if (hqScale > 1)
-			dpiScaler_ = std::make_unique<DpiParallelScaler>(hqScale);
-
-		while (const auto& entry = std::unique_ptr<wxZipEntry>(zipStream.GetNextEntry())) //take ownership!)
-		{
-			const wxString name = entry->GetName();
-
-			if (endsWith(name, L".png"))
-			{
-				wxImage img(zipStream, wxBITMAP_TYPE_PNG);
-				assert(img.IsOk());
-
-				//end this alpha/no-alpha/mask/wxDC::DrawBitmap/RTL/high-contrast-scheme interoperability nightmare here and now!!!!
-				//=> there's only one type of wxImage: with alpha channel, no mask!!!
-				convertToVanillaImage(img);
-
-				if (dpiScaler_)
-					dpiScaler_->add(name, img); //scale in parallel!
-				else
-					bitmaps_.emplace(name, img);
-			}
-			else if (endsWith(name, L".gif"))
-			{
-				//work around wxWidgets bug: wxAnimation::Load() requires seekable input stream (zip-input stream is not seekable)
-				std::string stream(entry->GetSize(), '\0');
-				if (!stream.empty() && zipStream.ReadAll(&stream[0], stream.size()))
-				{
-					wxMemoryInputStream seekAbleStream(stream.c_str(), stream.size()); //stream does not take ownership of data
-					[[maybe_unused]] const bool loadSuccess = anims_[name].Load(seekAbleStream, wxANIMATION_TYPE_GIF);
-					assert(loadSuccess);
-				}
-				else
-					assert(false);
-			}
-			else
-				assert(false);
-		}
+        const wxString& name = utfTo<wxString>(afterLast(fileName, FILE_NAME_SEPARATOR, IF_MISSING_RETURN_ALL));
+
+        wxMemoryInputStream wxstream(stream.c_str(), stream.size()); //stream does not take ownership of data
+        //bonus: work around wxWidgets bug: wxAnimation::Load() requires seekable input stream (zip-input stream is not seekable)
+          
+        if (endsWith(name, L".png"))
+        {
+            wxImage img(wxstream, wxBITMAP_TYPE_PNG);
+            assert(img.IsOk());
+
+            //end this alpha/no-alpha/mask/wxDC::DrawBitmap/RTL/high-contrast-scheme interoperability nightmare here and now!!!!
+            //=> there's only one type of wxImage: with alpha channel, no mask!!!
+            convertToVanillaImage(img);
+
+            if (dpiScaler_)
+                dpiScaler_->add(name, img); //scale in parallel!
+            else
+                bitmaps_.emplace(name, img);
+        }
+#if 0
+        else if (endsWith(name, L".gif"))
+        {
+            [[maybe_unused]] const bool loadSuccess = anims_[name].Load(wxstream, wxANIMATION_TYPE_GIF);
+            assert(loadSuccess);
+        }
+#endif
+        else
+            assert(false);
     }
-    catch (FileError&) { assert(false); }
 }
 
 
@@ -272,10 +291,10 @@ const wxAnimation& GlobalBitmaps::getAnimation(const wxString& name) const
 }
 
 
-void zen::initResourceImages(const Zstring& filepath)
+void zen::initResourceImages(const Zstring& zipPath)
 {
     if (std::shared_ptr<GlobalBitmaps> inst = GlobalBitmaps::instance())
-        inst->init(filepath);
+        inst->init(zipPath);
     else
         assert(false);
 }
diff --git a/wx+/image_resources.h b/wx+/image_resources.h
index 5ea56679..ff1d5648 100644
--- a/wx+/image_resources.h
+++ b/wx+/image_resources.h
@@ -14,7 +14,7 @@
 
 namespace zen
 {
-void initResourceImages(const Zstring& filePath); //pass resources .zip file at application startup
+void initResourceImages(const Zstring& zipPath); //pass resources .zip file at application startup
 void cleanupResourceImages();
 
 const wxBitmap&    getResourceImage    (const wxString& name);
diff --git a/wx+/image_tools.cpp b/wx+/image_tools.cpp
index 0f248057..8f94d1bc 100644
--- a/wx+/image_tools.cpp
+++ b/wx+/image_tools.cpp
@@ -72,7 +72,7 @@ wxImage zen::stackImages(const wxImage& img1, const wxImage& img2, ImageStackLay
     int width  = std::max(img1Width,  img2Width);
     int height = std::max(img1Height, img2Height);
 
-    if (dir == ImageStackLayout::HORIZONTAL)
+    if (dir == ImageStackLayout::horizontal)
         width = img1Width + gap + img2Width;
     else
         height = img1Height + gap + img2Height;
@@ -85,11 +85,11 @@ wxImage zen::stackImages(const wxImage& img1, const wxImage& img2, ImageStackLay
     {
         switch (align)
         {
-            case ImageStackAlignment::CENTER:
+            case ImageStackAlignment::center:
                 return static_cast<int>(std::floor((totalExtent - imageExtent) / 2.0)); //consistency: round down negative values, too!
-            case ImageStackAlignment::LEFT:
+            case ImageStackAlignment::left:
                 return 0;
-            case ImageStackAlignment::RIGHT:
+            case ImageStackAlignment::right:
                 return totalExtent - imageExtent;
         }
         assert(false);
@@ -98,12 +98,12 @@ wxImage zen::stackImages(const wxImage& img1, const wxImage& img2, ImageStackLay
 
     switch (dir)
     {
-        case ImageStackLayout::HORIZONTAL:
+        case ImageStackLayout::horizontal:
             writeToImage(output, img1, wxPoint(0,               calcPos(img1Height, height)));
             writeToImage(output, img2, wxPoint(img1Width + gap, calcPos(img2Height, height)));
             break;
 
-        case ImageStackLayout::VERTICAL:
+        case ImageStackLayout::vertical:
             writeToImage(output, img1, wxPoint(calcPos(img1Width, width), 0));
             writeToImage(output, img2, wxPoint(calcPos(img2Width, width), img1Height + gap));
             break;
@@ -165,13 +165,13 @@ wxImage zen::createImageFromText(const wxString& text, const wxFont& font, const
             if (!lineText.empty())
                 switch (textAlign)
                 {
-                    case ImageStackAlignment::LEFT:
+                    case ImageStackAlignment::left:
                         dc.DrawText(lineText, wxPoint(0, posY));
                         break;
-                    case ImageStackAlignment::RIGHT:
+                    case ImageStackAlignment::right:
                         dc.DrawText(lineText, wxPoint(maxWidth - lineSize.GetWidth(), posY));
                         break;
-                    case ImageStackAlignment::CENTER:
+                    case ImageStackAlignment::center:
                         dc.DrawText(lineText, wxPoint((maxWidth - lineSize.GetWidth()) / 2, posY));
                         break;
                 }
@@ -191,7 +191,7 @@ wxImage zen::createImageFromText(const wxString& text, const wxFont& font, const
     for (int i = 0; i < pixelCount; ++i)
     {
         //black(0,0,0) becomes wxIMAGE_ALPHA_OPAQUE(255), while white(255,255,255) becomes wxIMAGE_ALPHA_TRANSPARENT(0)
-        *alpha++ = static_cast<unsigned char>((255 - rgb[0] + 255 - rgb[1] + 255 - rgb[2]) / 3); //mixed mode arithmetics!
+        *alpha++ = static_cast<unsigned char>((255 - rgb[0] + 255 - rgb[1] + 255 - rgb[2]) / 3); //mixed-mode arithmetics!
 
         rgb[0] = col.Red  (); //
         rgb[1] = col.Green(); //apply actual text color
@@ -211,7 +211,7 @@ wxImage zen::layOver(const wxImage& back, const wxImage& front, int alignment)
     const int width  = std::max(back.GetWidth(),  front.GetWidth());
     const int height = std::max(back.GetHeight(), front.GetHeight());
 
-	const int offsetX = [&]
+    const int offsetX = [&]
     {
         if (alignment & wxALIGN_RIGHT)
             return back.GetWidth() - front.GetWidth();
@@ -239,7 +239,7 @@ wxImage zen::layOver(const wxImage& back, const wxImage& front, int alignment)
     ::memset(output.GetAlpha(), wxIMAGE_ALPHA_TRANSPARENT, width * height);
 
     const wxPoint posBack(std::max(-offsetX, 0), std::max(-offsetY, 0));
-    writeToImage(output, back , posBack);
+    writeToImage(output, back, posBack);
     writeToImage(output, front, posBack + wxPoint(offsetX, offsetY));
     return output;
 }
diff --git a/wx+/image_tools.h b/wx+/image_tools.h
index d72597ef..e2d42fb0 100644
--- a/wx+/image_tools.h
+++ b/wx+/image_tools.h
@@ -18,25 +18,25 @@ namespace zen
 {
 enum class ImageStackLayout
 {
-    HORIZONTAL,
-    VERTICAL
+    horizontal,
+    vertical
 };
 
 enum class ImageStackAlignment //one-dimensional unlike wxAlignment
 {
-    CENTER,
-    LEFT,
-    RIGHT,
-    TOP = LEFT,
-    BOTTOM = RIGHT,
+    center,
+    left,
+    right,
+    top = left,
+    bottom = right,
 };
 wxImage stackImages(const wxImage& img1, const wxImage& img2, ImageStackLayout dir, ImageStackAlignment align, int gap = 0);
 
-wxImage createImageFromText(const wxString& text, const wxFont& font, const wxColor& col, ImageStackAlignment textAlign = ImageStackAlignment::LEFT); //CENTER/LEFT/RIGHT
+wxImage createImageFromText(const wxString& text, const wxFont& font, const wxColor& col, ImageStackAlignment textAlign = ImageStackAlignment::left); //center/left/right
 
 wxImage layOver(const wxImage& back, const wxImage& front, int alignment = wxALIGN_CENTER);
 
-wxImage greyScale(const wxImage& img); //greyscale + brightness adaption
+wxImage  greyScale(const wxImage&  img); //greyscale + brightness adaption
 wxBitmap greyScale(const wxBitmap& bmp); //
 
 //void moveImage(wxImage& img, int right, int up);
@@ -44,8 +44,6 @@ void adjustBrightness(wxImage& img, int targetLevel);
 double getAvgBrightness(const wxImage& img); //in [0, 255]
 void brighten(wxImage& img, int level); //level: delta per channel in points
 
-bool isEqual(const wxBitmap& lhs, const wxBitmap& rhs); //pixel-wise equality (respecting alpha channel)
-
 void convertToVanillaImage(wxImage& img); //add alpha channel if missing + remove mask if existing
 
 //wxColor gradient(const wxColor& from, const wxColor& to, double fraction); //maps fraction within [0, 1] to an intermediate color
@@ -153,36 +151,6 @@ void adjustBrightness(wxImage& img, int targetLevel)
 
 
 inline
-bool isEqual(const wxBitmap& lhs, const wxBitmap& rhs)
-{
-    if (lhs.IsOk() != rhs.IsOk())
-        return false;
-    if (!lhs.IsOk())
-        return true;
-
-    if (lhs.GetSize() != rhs.GetSize())
-        return false;
-
-    wxImage imLhs = lhs.ConvertToImage();
-    wxImage imRhs = rhs.ConvertToImage();
-
-    if (imLhs.HasAlpha() != imRhs.HasAlpha())
-        return false;
-
-    const int pixelCount = lhs.GetWidth() * lhs.GetHeight();
-
-    if (!std::equal(imLhs.GetData(), imLhs.GetData() + pixelCount * 3, imRhs.GetData()))
-        return false;
-
-    if (imLhs.HasAlpha())
-        if (!std::equal(imLhs.GetAlpha(), imLhs.GetAlpha() + pixelCount, imRhs.GetAlpha()))
-            return false;
-
-    return true;
-}
-
-
-inline
 wxImage shrinkImage(const wxImage& img, int requestedSize)
 {
     const int maxExtent = std::max(img.GetWidth(), img.GetHeight());
diff --git a/wx+/popup_dlg_generated.cpp b/wx+/popup_dlg_generated.cpp
index 3e490757..af43c85b 100644
--- a/wx+/popup_dlg_generated.cpp
+++ b/wx+/popup_dlg_generated.cpp
@@ -1,5 +1,5 @@
 ///////////////////////////////////////////////////////////////////////////
-// C++ code generated with wxFormBuilder (version May 29 2018)
+// C++ code generated with wxFormBuilder (version Oct 26 2018)
 // http://www.wxformbuilder.org/
 //
 // PLEASE DO *NOT* EDIT THIS FILE!
@@ -39,7 +39,7 @@ PopupDialogGenerated::PopupDialogGenerated( wxWindow* parent, wxWindowID id, con
 
     bSizer16->Add( 0, 5, 0, 0, 5 );
 
-    m_textCtrlTextDetail = new wxTextCtrl( m_panel33, wxID_ANY, wxEmptyString, wxDefaultPosition, wxDefaultSize, wxTE_MULTILINE|wxTE_READONLY|wxNO_BORDER );
+    m_textCtrlTextDetail = new wxTextCtrl( m_panel33, wxID_ANY, wxEmptyString, wxDefaultPosition, wxDefaultSize, wxTE_MULTILINE|wxTE_READONLY|wxBORDER_NONE );
     bSizer16->Add( m_textCtrlTextDetail, 1, wxEXPAND, 5 );
 
 
@@ -63,6 +63,7 @@ PopupDialogGenerated::PopupDialogGenerated( wxWindow* parent, wxWindowID id, con
     bSizerStdButtons = new wxBoxSizer( wxHORIZONTAL );
 
     m_buttonAccept = new wxButton( this, wxID_YES, _("dummy"), wxDefaultPosition, wxSize( -1, -1 ), 0 );
+
     m_buttonAccept->SetDefault();
     bSizerStdButtons->Add( m_buttonAccept, 0, wxALIGN_CENTER_VERTICAL|wxBOTTOM|wxRIGHT|wxLEFT, 5 );
 
diff --git a/wx+/popup_dlg_generated.h b/wx+/popup_dlg_generated.h
index 9d9bc3f8..2b09289b 100644
--- a/wx+/popup_dlg_generated.h
+++ b/wx+/popup_dlg_generated.h
@@ -1,12 +1,11 @@
 ///////////////////////////////////////////////////////////////////////////
-// C++ code generated with wxFormBuilder (version May 29 2018)
+// C++ code generated with wxFormBuilder (version Oct 26 2018)
 // http://www.wxformbuilder.org/
 //
 // PLEASE DO *NOT* EDIT THIS FILE!
 ///////////////////////////////////////////////////////////////////////////
 
-#ifndef __POPUP_DLG_GENERATED_H__
-#define __POPUP_DLG_GENERATED_H__
+#pragma once
 
 #include <wx/artprov.h>
 #include <wx/xrc/xmlres.h>
@@ -70,4 +69,3 @@ public:
 
 };
 
-#endif //__POPUP_DLG_GENERATED_H__
diff --git a/wx+/rtl.h b/wx+/rtl.h
index 0adb6037..3ab701a7 100644
--- a/wx+/rtl.h
+++ b/wx+/rtl.h
@@ -94,13 +94,14 @@ void drawBitmapRtlNoMirror(wxDC& dc, const wxBitmap& bmp, const wxRect& rect, in
 }
 
 
-inline 
+inline
 wxImage mirrorIfRtl(const wxImage& bmp)
 {
     if (wxTheApp->GetLayoutDirection() == wxLayout_RightToLeft)
         return bmp.Mirror();
     else
-        return bmp;}
+        return bmp;
+}
 
 
 inline
diff --git a/wx+/std_button_layout.h b/wx+/std_button_layout.h
index cf0152de..d2c5fc32 100644
--- a/wx+/std_button_layout.h
+++ b/wx+/std_button_layout.h
@@ -83,7 +83,7 @@ void setStandardButtonLayout(wxBoxSizer& sizer, const StdButtons& buttons)
         {
             assert(btn->GetMinSize().GetHeight() == -1); //let OS or this routine do the sizing! note: OS X does not allow changing the (visible!) button height!
             const int defaultHeight = wxButton::GetDefaultSize().GetHeight(); //buffered by wxWidgets
-            btn->SetMinSize(wxSize(-1, std::max(defaultHeight, fastFromDIP(30)))); //default button height is much too small => increase!
+            btn->SetMinSize({-1, std::max(defaultHeight, fastFromDIP(31))}); //default button height is much too small => increase!
 
             if (settingFirstButton)
                 settingFirstButton = false;
diff --git a/wx+/tooltip.cpp b/wx+/tooltip.cpp
index 42fb058a..0beef0bf 100644
--- a/wx+/tooltip.cpp
+++ b/wx+/tooltip.cpp
@@ -61,7 +61,7 @@ void Tooltip::show(const wxString& text, wxPoint mousePos, const wxBitmap* bmp)
 
     const wxBitmap& newBmp = bmp ? *bmp : wxNullBitmap;
 
-    if (!isEqual(tipWindow_->bitmapLeft_->GetBitmap(), newBmp))
+    if (!tipWindow_->bitmapLeft_->GetBitmap().IsSameAs(newBmp))
     {
         tipWindow_->bitmapLeft_->SetBitmap(newBmp);
         tipWindow_->Refresh(); //needed if bitmap size changed!